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52. A hidden precipitation scenario of the θ′-phase in Al-Cu alloys

Author

W.Q. Ming, Li Zhou, C.L. Wu, J.H. Chen, Pan Xie, Ke Du, and Fengjiao Niu

Subjects
Morphology (linguistics), Materials science, Polymers and Plastics, Precipitation (chemistry), Mechanical Engineering, Metals and Alloys, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Tetragonal crystal system, Crystallography, Precipitation hardening, Mechanics of Materials, Phase (matter), Materials Chemistry, Ceramics and Composites, 0210 nano-technology
Abstract

Al-Cu binary alloys are important and interesting industry materials. Up to date, the formation mechanisms of the key strengthening precipitates, named θ′-phase, in the alloys are still controversial. Here, we report that for non-deformed bulk Al-Cu alloys the θ′-phase actually has its own direct precursors that can form only at elevated aging temperature (> ca. 200 °C). These high-temperature precursors have the same plate-like morphology as the θ′-phase precipitates but rather different structures. Atomic-resolution imaging reveals that they have a tetragonal structure with a = 0.405 nm and c = 1.213 nm, and an average composition of Al5-xCu1+x (0 ≤ x

Published
2021

53. Atomic-scale roles of Zn element in age-hardened AlMgSiZn alloys

Author

Sidong Chen, Peng Gao, J.H. Chen, N.N. Jiao, and Y.X. Lai

Subjects
Materials science, Polymers and Plastics, Mechanical Engineering, Alloy, Metallurgy, Metals and Alloys, chemistry.chemical_element, 02 engineering and technology, Crystal structure, engineering.material, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Atomic units, 0104 chemical sciences, Zn element, chemistry, Mechanics of Materials, Aluminium, Materials Chemistry, Ceramics and Composites, engineering, Hardening (metallurgy), 0210 nano-technology
Abstract

Adding alloying elements to improve the performances or the manufacturing processes of Al-Mg-Si alloys has long been a serious issue in developing advanced automotive aluminum materials. The Zn element, among those promising ones, has demonstrated positive alloying effects on Al-Mg-Si alloys. However, the atomic-scale roles of Zn in an age-hardened Al-Mg-Si-Zn alloy have not been adequately understood. Using atomic-resolution electron microscopy, here we report the precise locations of Zn elements in all hardening precipitates involved and their alloying mechanism at the atomic scale when alloying the alloy. Our results show that Zn atoms enter all the major hardening phases to occupy specific featured atomic sites of the original elements, e.g. the Si1 and Mg2 sites in the β'-2 phase, and modify their crystal structures, interfacial structures and morphologies in characteristic manners. It is revealed that for the β'-phase, Zn atoms occupy unique atomic sites, whereas for other phases, they demonstrate similar behaviors as other additive alloying elements such as Ag and Cu do.

Published
2021

55. Preface

Author

J.H. Chen

Subjects
General Earth and Planetary Sciences, General Environmental Science
Published
2023

56. Enhanced Hydrogen Ab/De-sorption of Mg(Zn) solid solution alloy catalyzed by YH2/Y2O3 nanocomposite

Author

Z.Y. Du, Y.S. Huang, C.Y. Cao, H.C. Zhong, L.Y. Dai, Huaijun Lin, X.J. Lu, and J.H. Chen

Subjects
Materials science, Nanocomposite, Hydrogen, Renewable Energy, Sustainability and the Environment, Alloy, Intermetallic, Energy Engineering and Power Technology, chemistry.chemical_element, 02 engineering and technology, engineering.material, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, 0104 chemical sciences, Fuel Technology, Chemical engineering, chemistry, Phase (matter), Desorption, engineering, Dehydrogenation, 0210 nano-technology, Solid solution
Abstract

YH2/Y2O3 nanocomposite was prepared and introduced to Mg0.97Zn0.03 solid solution alloy forming a nanocomposite of Mg0.97Zn0.03-10 wt%YH2/Y2O3 by mechanical milling. The phase components and microstructure were systematically investigated by XRD, SEM and STEM. Hydrogenation of Mg0.97Zn0.03 solid solution resulted in phase segregation into MgH2 and intermetallic compound MgZn2. The in-situ formed ultra-fine MgZn2 homogeneously dispersed in MgH2 matrix, and returned to Mg(Zn) solid solution through dehydrogenation. This reversible phase transition of Mg(Zn) solid solution benefited to thermodynamic destabilization of MgH2. The co-dopant of YH2 and Y2O3 exhibited synergistic catalytic effects on the hydrogen absorption and desorption of Mg0.97Zn0.03 solid solution alloy. As a result, Mg0.97Zn0.03-10 wt%YH2/Y2O3 nanocomposite showed significantly improved kinetics with obviously lowered hydriding and dehydriding activation energy of 45.8 kJ⋅mol−1⋅H2 and 74.7 kJ⋅mol−1⋅H2, respectively, and the enthalpy of hydrogen desorption was reduced to 72.2 kJ⋅mol−1⋅H2.

Published
2020

57. Construction and commissioning of the collinear laser spectroscopy system at BRIF

Author

S.J. Wang, X.F. Yang, S.W. Bai, Y.C. Liu, P. Zhang, Y.S. Liu, H.R. Hu, H.W. Li, B. Tang, B.Q. Cui, C.Y. He, X. Ma, Q.T. Li, J.H. Chen, K. Ma, L.S. Yang, Z.Y. Hu, W.L. Pu, Y. Chen, Y.F. Guo, Z.Y. Du, Z. Yan, F.L. Liu, H.R. Wang, G.Q. Yang, Y.L. Ye, and B. Guo

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Physics::Accelerator Physics, FOS: Physical sciences, Physics::Atomic Physics, Instrumentation and Detectors (physics.ins-det), Nuclear Experiment (nucl-ex), Nuclear Experiment, Instrumentation
Abstract

We have constructed a collinear laser spectroscopy (CLS) system installed at the Beijing Radioactive Ion-beam Facility (BRIF), aiming to investigate the nuclear properties of unstable nuclei. The first on-line commissioning experiment of this system was performed using the continuous stable ($^{39}$K) and unstable ($^{38}$K) ion beams produced by impinging a 100-MeV proton beam on a CaO target. Hyperfine structure spectra of these two isotopes are reasonably reproduced, and the extracted magnetic dipole hyperfine parameters and isotope shift agree with the literature values. The on-line experiment demonstrates the overall functioning of this CLS system, opening new opportunities for laser spectroscopy measurement of unstable isotopes at BRIF and other radioactive ion beam facilities in China.

Published
2022
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65. Precipitation of γ′ nitrides in N-saturated ferrite at high temperature and its effect on nitriding

Author

Hong Yue, C.L. Wu, and J.H. Chen

Subjects
Materials science, Scanning electron microscope, Mechanical Engineering, Metallurgy, Metals and Alloys, Nucleation, chemistry.chemical_element, 02 engineering and technology, Nitride, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Nitrogen, 0104 chemical sciences, chemistry, Mechanics of Materials, Transmission electron microscopy, Ferrite (iron), Vickers hardness test, Materials Chemistry, 0210 nano-technology, Nitriding
Abstract

The precipitation behavior of the γ′ phase during ferritic nitriding has ever been unclear although a lot of attentions have been drawn to shortening the incubation period of γ′ nitrides and improving the nitriding efficiency. In the present work, the precipitation of γ′ nitrides at high temperature and the effect of early formed γ′ nitrides on nitriding were systematically investigated using X-ray diffraction, scanning electron microscopy, transmission electron microscopy and hardness test. The results indicate that, once nucleation occurs, the γ′ phase is formed quickly via the phase transformation of α-Fe → αN → γ′ at high temperature. The early-formed nitrides on the surface of samples accelerate the penetration of nitrogen in the α-Fe grains and improve the nitriding efficiency. The decrease of temperature during nitriding induces the formation of the γ′ nitrides in advance, shortens the incubation time and further increase the nitriding rate. A new nitriding process, involving a short term nitriding at high temperature and a short term nitriding with temperature drop, is proposed to shorten the incubation time and improve the nitriding efficiency.

Published
2019

66. PBA-loaded albite-base ceramic foam in application to adsorb harmful ions of Cd, Cs and As(V) in water

Author

Wei Cheng, P.S. Liu, and J.H. Chen

Subjects
Ceramic foam, Materials science, Ion exchange, Mechanical Engineering, Metal ions in aqueous solution, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Adsorption, Chemical engineering, Mechanics of Materials, Modeling and Simulation, Specific surface area, visual_art, visual_art.visual_art_medium, Slurry, General Materials Science, Ceramic, 0210 nano-technology, Zeolite
Abstract

Purpose The purpose of this paper is to provide an investigation on a new kind of adsorbent materials, namely, the Prussian blue analog (PBA)-loaded albite-base porous ceramic foam, which can effectively adsorb the heavy metal ion in the wastewater. Design/methodology/approach The natural zeolite powder has been used as the primary raw material to make a sort of porous ceramic foam by impregnating polymer foam in slurry and then sintering. Adjusting the technological parameters could control the bulk density of the ceramic product, which could float on water with the bulk density less than 1 g/cm3 and also sink in water with the bulk density higher than 1 g/cm3. After desilicating the porous ceramic foam, an Al-Fe type PBA with a strong function of ion exchange was loaded on the ceramic surface by directly yielding. Findings The adsorption performance for harmful metal ions was greatly improved by combining together the high adsorption capability of the PB analog and the efficient high specific surface area of the porous ceramic foam. Originality/value This work presents a PBA-loaded albite-base porous ceramic foam that can effectively adsorb the harmful substance in water, and the adsorption efficiency for some typical harmful ions, i.e., Cd2+, Cs+ and As(V), was examined under different conditions of the experimental period, the pH value and the ion concentration in the tested solution.

Published
2019

67. Critical care usage after major gastrointestinal and liver surgery: a prospective, multicentre observational study

Author

T. Yang, T. Pitts-Tucker, Daron Smith, S. Suresh, A.A. Khetarpal, C. Brathwaite-Shirley, Justine Davies, Sayinthen Vivekanantham, A. A. Adebayo, T. Sorah, N. Yim, H.R. Jackson, Salim Tayeh, R.H. Bremner, A. Piquet, L. Higgs, R. Yuen, P. Fergurson, N.K. Sim, A. Hibberd, A. Mehdi, N. Moody, D. Maru, C. Joyner, I. Hindle Fisher, Vartan Balian, N. Wetherall, Siyin Liu, P.N. Phan, S. Mallick, C. Lek, B. Oremule, S. Nelaj, M. Williams, Maqsood Qamar, A. Menon, M. Mohamud, H. Cheema, C. Chan, H.M. Omer, S.J. Cole, E. Craig, K.E. Leslie, S.S. Talukdar, R.B.S. Holliday, J. Heskin, A. Cody, Syed Shumon, S. McAleer, S. Abburu, P. Deekonda, S.F. Ashraf, R. Bose, AE Cotton, C. McGowan, S. Rashid, K. Theodoropoulou, A. MacAskill, Vishal Narwani, R. Maamari, S. Stokes, L.N. Harris, Peng Yong Sim, Evie Gardner, Leo Ng, N. Chandan, J.W. Lockey, M. Acres, H. Jhala, M.L. Kwan, A. Abdulmajid, A.E. Cardwell, P. Buakuma, C.P. Keane, M. Ahmed, N.J. Chilvers, E. Semple, J. Meek, A.K. Clarke, K. Koysombat, A. Hague, E.J.H. Turner, N. Keelty, P. Karunakaran, K.D. Clement, Mansoor Khan, Y. Cao, O. Prys-Jones, S.L. Walsh, C.N. McKerr, Sanjay Shah, S. Peroos, A. Dhanji, Joseph M. Norris, Neil Smith, M. Lakhani, M. Wijesekera, M. Bhatti, Midhun Mohan, C.Y. Luk, M. Elkawafi, S. Wadanamby, Jameel Mushtaq, Jonathan C. M. Wan, A. Ghaffar, M. Siddiqui, S. Naqib, Michaeline Kelly, J.W. Duncumb, F. Hughes, H.E.M. Jordan, R. Callan, G. Hung, C.F. Brewer, E.M. Ruiz, A. Higgins, C. Horst, C. Roberts, S. Kanabar, C. Wall, A.M. Buchan, A. Luhishi, R.P. Watson, D. Xylas, A. McBride, A. Bell, G. Heppenstall-Harris, A. Pericleous, Akanksha Chhabra, N. Hitchen, P. Raut, Shahzada Ahmed, M. Mirza, C.H. Archer, G. Russell, C.T. Francescon, D.T. Robertson, N. Gardiner, K. Cheng, A. Mishra, E. Webb, L. Rothwell, Dee A. Carter, V. Gupta, M. Johnstone, M.E. Kelly, R.D.C. Moon, E. Woin, K. Nadanakumaran, U. White, J. Empey, F. Bulley, R. Morley, G. Charalambous, L. Turner, S. Angelov, D. Coffey, S. Hartley, S. Pronin, E. Seager, R.K. Varma, Sharifullah Khan, S.B. Husnoo, R.K. Sethi, H.M. Chang, A. Duffy, Hew D.T. Torrance, P. Cunha, L. Kimani, W. Din, E.G. Heywood, C. O'Connell, D. Wylam, L. Anderson, N. Ahern, A.J. Trist, D. Burke, A. He, M. Sundar-Singh, A. Odeleye, G. Kumaran, N.L. Salloum, T.M. Brooks, A.S. Lynch, R. Debenham, Howard Gardner, M. Nielsen, M. Das, G. Bingham, S. Qureshi, Aditya Borakati, J. Wylie, Z. Kazmi, J.H. Park, P. Gill, A.R. Craig, M. Chen, Jonathan Wild, S.J. Lim, K.P. Choo, G. Culleton, G. Deas, E.Y. Chua, D. Vanniasegaram, A.H. Amphlett, N. Rajan, J.H. Chen, M. Hameed, Paul Ziprin, C. Toale, D. Gold, N. Keane, Jacob H Matthews, E. Palkhi, Nick Watson, C.M. Hewitt, A. Yousif, Faheem Ahmed, D. Wilkinson, John Mason, C. Reeder, R. Sagar, Deirdre A. Collins, S. Sandhu, S. Singh, J. Herron, A.Y.L. Ng, K. Brennan, K.A. Hoban, V. Navayogaarajah, A.S. Jawad, J.Y.L. Low, Julian R. Johnston, J. Wye, Inge Bernstein, John Parkin, A.D. Henson, Y.H. Soo, C. Topham, M. Steel, Priyank Patel, C.M. Lankage, U. Ashfaq, E.J. Brown, N.L. Foster, C.W. Rookes, R.J. Greig, K.L. McKevitt, N. Jathanna, J.M. Geraghty, M. Karia, S. Cumming, H. Holyoak, S. Parthiban, R.B. Karsan, V.C. Wing, T.E. Glover, R.D. Adams, B.H. Miranda, S. Gaffney, S. Rogers, G.E. Torlot, J.J. Filby, S. Sii, N.M. Rafiq, M. Shoa, S. Singagireson, N. Ungcharoen, Jennie Parker, B.F. Chong, N.M. Shafiq, V. Wong, E. Shakweh, A. Al-Mousawi, J. Pearce, S. Botchey, L. Horne, L. Fletcher, B. Singh, E.A. Whatling, K. Duke, A. Mastan, A.L. Frank, S. Verma, Humaira Shaheen, W. Liew, J. Turner, R. Rampal, T. Filipescu, R.M. Markham, B.A. Patel, S. Lim, A. Atayi, S. Yoganathan, N. Ramsay, M. Khattak, O. Amin, E. McAleer, K. Gohil, H. Shufflebotham, George S Bethell, M. Dhar, J.E. Davies, A.F. Carroll, E. Cornish, S. Omara, J. Bartlett, D. Loughran, A. Iqbal, L.R. Springford, D.R. McCormack, S. Leong, R. Ingham, D. Tan, A. Khajuria, M. Tonkins, M. Petrarca, A.M. Bucko, L.L. McKelvey, C. Gill, C.E. Thakker, K. Mohan, J. Turnbull, G. Cuthbert, W. Dean, R.D.J. Whitham, D.M. Lees, N. Chan, D. Osei-Kuffour, A. Sahathevan, K. Ng, L.B. Anderson, J. Eraifej, A. O'Connor, O.J. Cundy, C. Kong, R.K. Hughes, Bryan Paul Traynor, P. Keane, C. Liu, E. Canning, E.D. Mills, C. Gouldthrope, S. Patel, M.J.V. Holmes, C. Cullen, Lisa McNamee, Alberto Pizzolato, P. Harries, M. Elseedawy, R. Varley, C. Whacha, S.G. Ratu, A. Wright, S. Parsons, Pishoy Gouda, A. Mian, R. Bhudia, R. Adams, N. Bell, Talisa Ross, R. Reid, J.P. Shah, Sarah Dean, C. Neophytou, Alex Ward, J.D. Thompson, M. Seedat, A. Ramnarine, R.T. Harris, A. Qureshi, C. Major, Y. Sinha, A.S. Rocke, C.S. Yong, P. Kwang, David Neil Cooper, L. Aildasani, R.W. Goh, A.R. Dyal, L. Braganza, L. Healy, N. Davies, T. Reakes, N. Patel, S. Sng, C. Brennan, Z.R. Bakewell, S.L. Jenkin, Ahmed Daoub, I.A. Rhema, R.A. Walford, O. Spence, L. Yow, E.J. Roberts, W. Cymes, Y. Liew, E. Segall, June A. Sullivan, K.K. Sandhu, L. Satterthwaite, G.X. Xu, R.M. Waldron, S. McGarvie, D. Brown, M. Alizadeh, J.A. Syeed, H.F. Roberts, P. Dawson, H.R. Abdikadir, S. O'Connor, Y. Maheswaran, B.A. Hughes, B.A. Atraszkiewicz, K. Singh, C. Mcgenity, A.D. Wood, Ewan D. Kennedy, S.X. Poo, S. Mitrasinovic, Max Marsden, A. Ibrahim, Daniel F. McAuley, M. Attalla, S. Govinden, Siti Asma' Hassan, T. Raghvani, T. Bloomfield, R. Heminway, M. Ali, K.L. Robertson, P. Lalor, T. Dogra, I. Antoniou, A. Tahmina, Markus L. Sagmeister, Ronan McMullan, J. Matthams, Richard J. Egan, Elspeth Cumber, M. Dolaghan, P. Sritharan, S. Sarwar, E.S.M. Tan, S.E. Murray, S. Morris, S. Mansoor, M. King, Randall V. Martin, P. Williams, G. Brent, N.B. Reid, S. Collinson, T. Sarvanandan, R. Ratnakumaran, R.E. Keeling, M.A. Sherif, D. Thomas, I.J. Clark, R. Coulson, T.P. Bemand, A. Abid, A.L. Martin, J.C.K. Ng, P. Avery, Y. Narang, R. Manson, H. Petra, J.E. Giles, A.E. Lim, N.A. Vithanage, S. Osman, D. Elf, Panagis M. Lykoudis, A. Ang, Debra Salmon, A. Croall, T. Sale, S. Bonsu, Y.P. Mogan, G.E. Cooper, J. Lamont, S.T. Marchal, P. Naran, A.N. Kumar, R. Owasil, F. Koumpa, J.Q. Ng, P.N. Nesargikar, J. Boyle, Ryan Preece, E. Sewart, S. Lee, S. Kosasih, N. Jamal, Stephen J Chapman, N.A. Redgrave, C. Holmes, A.E. Barthorpe, S. Mistry, J.A. Yates, Robin Wilson, E. Prakash, J.Y. Kee, S.M. Anderson, R.S. Suresh, N. Hussain, S. Gentry, S. Darr, H. Heneghan, H.D. McRobbie, S. Assadullah, Shivam Bhanderi, C. Weston, A. Delport, A. Winarski, M.M. Li, T. Tharmachandirar, N. Canning, P.R. Forrest, Adam J Boulton, A. Ponweera, G.E. Stewart, J.S. Ahn, J. Hartley, A. Isaac, J.L.Y. Allen, R. Carr, S. Gokani, J. Zhao, C. Player, D. Sim, W. English, R.J. McGalliard, S. Cullen, R. Thethi, A. Livesey, K.N. Lwin, M. K. Abd Ghaffar, C.L. Knight, P.C. Hurst, A.Y. Tay, Devender Mittapalli, F. Winslow, G. Bhaskaran, L. Gauntlett, W. Leung, D.M. Golding, A. Wali, D.C. Marshall, H. Ross, K.P. Raman, P.J. Teoh, C. Allan, I. Nehikhare, C.M. Ventre, M. Venn, J.A. Crewdson, A. Shukla, N. Ramjeeawon, S. Shahid, P. Mithrakumar, J. Fern, Y. Tan, H. Haq, S. Turaga, U. Hayat, C. Palmer, H. Goradia, T. Ramtoola, J. Bloomer, C. Chhina, Z. Momoh, W.M. Wynell-Mayow, N. Jayakody, M. Bravo, J. Gabriel, R. Khanijau, L. Esteve, A. Malik, R.D. Obute, S. Sheth, S. Lunawat, U. Qureshi, C. Rees, A. Kerai, M. Peters, A.Y. Tsui, K. Kow, M. Trail, A. Coates, F. Long, V. Paraoan, M.T. Stoddart, N. Li, M. Bright, W.W. Chaudhry, M.K. Malys, S. Owczarek, C.L. Jubainville, E. Brennan, M. Hanrahan, A. Wang, A. Burgess, S. Dutt, N. Varma, R.P. Williams, A. Ledsam, R.T. Buckle, W. Ho, U. Sajjad, B. Goh, M.R. Hardy, E. Lim, L.J. Burney, C.S.D. Roy, Thomas M Drake, Harry J. Gilbert, A. Yener, A. Trimble, Archana Shah, H. Ahmed, E.C. Barton, K. Eparh, C. McCrann, F. Harding, J. Mah, D. Kotecha, A. Al-Robeye, J. MacDonald, S. Kim, Andrew Logan, C. McLaughin, H. Collier, O. Brewster, J. Loveday, L. Tung, S. Dindyal, O. Al-Obaedi, A. Simpson, M. Sirakaya, F. Morgan, G.S. Ng, S. Mahboob, D. FitzPatrick, A. Jindal, O. O'Carroll, Y. Devabalan, T. Axelson, D. Rojoa, K. Sasapu, Kirsty Davies, J. Moradzadeh, Ewen M Harrison, K. Gandhi, S. Beecroft, G. McCabe, C.P. Chilima, T. Goldsmith, H.Z. Bazeer, N. Kalra, P. Morrison, T.C. Hoskins, J.J. Wiltshire, A. Narain, D. Joshi, D. Horth, H.C.P. Wilson, Y.F. Dennis, M. Mills, C. Diaper, J.A. Sanders, S.M. Chiu, J. Coffin, V. Elangovan, K.S. Dolbec, H.L. Warwick, R.H. Shuttleworth, T. Patel, R. Goodson, F.S. Brown, Jane Lim, O. Ziff, M. Rashid, V. Mirdavoudi, K.G. Reid, A. Broyd, E. Woon, M. Zuhair, A.D. Greenhalgh, L.R. Wingfield, S. Stevens, O. Hussain, G. Pandey, A. Bakhsh, I.B. Ptacek, J. Dobson, L. Bolton, A.L. Kerr, T.M.P. Fung, P. Narayan, T. Ward, Ruth Lyons, C. Robinson, Buket Gundogan, S. Akhtar, P. Vanmali, L. Austreng, N. Kelly, M. Kadicheeni, H Ali, P. Holton, H. Turley, C.J. Morrison, L. Hu, M. Sukkari, D.A. O'Sullivan, J. Brecher, C.J. White, M.A. Charalambos, William Bolton, M. Tahir, L. Grundy, T.P. Pezas, Ewan Brown, Nicholas Bullock, A.M.A. Shafi, A. Aslanyan, Michael F. Bath, H. Wilson, P.C. Copley, S.E. Scotcher, Heather Kennedy, N. Bassam, A. Omar, G.D. Stott, S. Ashraf, E. Galloway, R.D. Bartlett, H. Amin, Y.N. Neo, W.C. Soon, S. Rabinthiran, C. Phillips, L.A. Henderson, K. Whitehurst, A. Kahar, S. Sukumar, M.R. Williams, W.A. Gatfield, C. Ntala, K. Dear, A.R. Chitnis, M. Eragat, H.C. Huang, K. O'Sullivan, N. Yong, J. Robson, A. Valli, A. Mohite, G.J. Salam, F. Tongo, S. Lopes, R.A. O'Loughlin, S.L. Hickling, J. Fong, A. Chung, Kathy Nicholls, H. Abid, S. Balaji, J. Hardie, T. Reeves, H.R. Paine, M. Hayat, H. Nayee, Y.N. Suleman, S. Tan, M. Sharifpour, X. Chen, I. Barai, A. Yan, M.A. Gillies, T.W. Tilston, A. Kreibich, Y.H. Tan, A. Murtaza, Chris Dunn, P. Jull, J.W. Kim, A.D. Semana, N. Abuhussein, P. Shepherd, L. Derbyshire, P.M. McEnhill, J.B. Patel, C. Toh, T. Arif, B.W. Matthews, D. Shanahan, N. Seneviratne, L. Carr, A. Curran, A. Batho, L.D. O'Flynn, R. McAllister, A. Durr, Rahul Bhome, S. Mackin, K. Ahmad, R. Shaunak, S. Bassiony, H.A. Khokhar, R. Chin, R. Priestland, G.X.J. Sherliker, J.H. Entwisle, C. Anandarajah, H. Aziz, M. Chaudhary, A. Kishore, H. Adjei, M. Minhas, S.W. McLure, T. Kane, E. Ingram, T. Fautz, D. Chrastek, R. Singh, B.N. Shurovi, A. Asmadi, N. Ansari, J. Mahmood, K. Patel, A.N. Street, A. Thacoor, C. Girling, L. Cheskes, V. Shatkar, B. Ali, A. McGrath, Shaun Trecarten, J.D. Farmer, R. Dean, R.C. McLean, P.L.M. Harrison, S. Iqbal, S. Hirani, R. Fleck, S. Pope, C.Y. Kong, A.M. Demetri, H. Selvachandran, M. Malaj, H.K. Blege, B.D. Mistry, C.M. Grossart, R. Slade, S.A. Stanger, A.J. Dhutia, A. Amajuoyi, Ased Ali, M. Robinson, R. Punj, Jane Dickson, J. Lucas de Carvalho, Jessica Harvey, L.M. Bullman, D Nepogodiev, H.L. Joyce, Catrin Morgan, J. Paul, R. Vaughan, A. Prabhudesai, C. Egerton, A. Sheldon, C. Holloway, K. Brzyska, J. Ashwood, Christine McGarrigle, S. Pal, H. Rosen O'Sullivan, A. Rangedara, A. Hill, A. Szczap, S. Hudson-Phillips, J. Lavery, Harriet Mitchell, J.D.B. Hayes, M. Salem, F.A. Bamgbose, J. Bassett, V. Raghuvir, R. Dennis, S.E. Cox, C.J. Dewdney, N. Mitha, A.W. Roberts, Brij Patel, J. Wills, R. Goodier, R.M. Koshy, D. Weinberg, E.J. Griffin, Harriet L. Mills, A. Marsh, Z. Khonat, Kenneth A. McLean, E. Hester, T. Spencer, A.H.Y. Lee, J. Chong, L.R. Bookless, Michael J. Raphael, P. Sangal, M. McMenamin, H. Khalid, G.S. Harbhajan Singh, F.I. Chaudhry, N. Favero, J.E.F. Fitzgerald, Chetan Khatri, J. Remedios, A. Charania, Daniel J. George, S. Jackson, C. Murkin, R. Dawar, I. Kisyov, E. Wong, R.J. Pearse, A.N. Baker, L. Carthew, N. Warren, I. Adeleja, M. McCann, C. Drislane, R. Tan, S. Ho, K. Hulley, L. Doan, E.M. O'Neill, R. Gratton, M. Srikantharajah, C. Henderson, L. Puan, H. Whittingham, A. Johnston, E. Mckean, A.K. Tear, D. Varma, H. McFarlane, C.N. Lou, E.M. Cumber, Aneel Bhangu, Z.H. Siddiqui, J. Cleere, M. Chamberlain, James Glasbey, Sarah Ali, M. Masood, A. Linton, G. Chillarge, M. Davis-Hall, A. Anilkumar, U. Khan, A. Tai, R. Shepherd, Joshua Burke, W. Loke, M. Edison, A. Mortimer, N. Anim-Addo, R.S. Reehal, R. Blessed, Daniyal J. Jafree, M.S. Sait, H.C. Copley, N. Ward, M. Wells, K. Raji, J. Gulati, H. Keevil, C.A. Asbjoernsen, A. White, Nikita R. Bhatt, J. Barnes, S. Wang, F. Cheung, Clive Graham, K. Dynes, C. Dorman, E. Strange, A. Radotra, A. Reed, R. Nachiappan, I. Ibrahim, F. Acquaah, P. Jalota, S. Stezaker, J.E. Rogers, MI Perera, R. Kiff, T. Rangan, R. Weaver, E. Mazumdar, J. Beckett, Rowena McGregor, E.V. Wright, N. Punjabi, V. Charavanamuttu, Stephen O'Neill, S. Majid, Zulfiqarali G. Abbas, S.M. Lakhani, G. Rattan, J. Lua Boon Xuan, K. Joshi, HE Whewell, M. Patel, T.M. Schulz, O.K. Vernon, L.F. McClymont, N. Woodcock, L. Gray, Reena Shah, H. Thakur, F.S. Peck, P. Karia, L. Ashken, S. Rinkoff, M. McDowell, L. Chew, C.D. Blore, A.C.D. Smith, E. Auyoung, L.M. Sabine, O. Parker, S.M. Choi, V. Thirumal, J. Pickard, L. Murphy, C.J. Coffey, P. Dube, M.H. Abul, T. Khan, J. Campbell, M.T. Turner, Adam Gwozdz, K.K. Ong, B. Durrani, A. O'Kane, A.S. North, Najeeb Ahmed, C. Xiao, D. Maclennan, Nora Abdul Aziz, S.A. Semnani, L. Bell, Amy Ashton, L. Crozier, V. Teng, M. O'Bryan, K. Clesham, Vanisha Patel, L. Kretzmer, T. Lo, G.H. Stanley, M.D. Theodoreson, J.K. Mehta, F. Morris, L. Howells, R. Pinto, T. Bergara, J. Matheson, E. Devlin, E.T. Tan, E. Toner, L. Jacob, Sher Ahmad, J. Sellathurai, Catherine Doherty, J. Norton, C. Maxwell-Armstrong, S. Ng, T.R. Barrow, N. Boxall, A.A. Thevathasan, M. Ryan, E. Uppal, C. Jenvey, G.E. Aidoo-Micah, Karan Verma, U. Datta, F. Hirst, H. Woodward, J. Khangura, J. Chervenkoff, F. Edozie, E. Burke, M.G. Rasiah, A. Jaitley, Thomas L. Lewis, D. Lazenby, A. Lotfallah, A. Khan, E. McCance, Henry A. Claireaux, A.S. Fawaz, P.D. Jewell, R.G. Tharakan, R. Narramore, E. Heathcote, G. Nixon, H. Chin, E. Sun, L.S. Chew, K. Lim, G. Lakshmipathy, R. Telfer, B.A. Shuker, H. Kitt, O.D. Thompson, N. Behar, H. Naveed, R. Allot, E. Batt, E.J. Stone, J.M. Aithie, I. Henderson, Rakesh Heer, C. Deall, C.J. McIntyre, L. Dinsmore, S. Milne, Bhavik Anil Patel, N. Cody, A. Pandey, A. Kaushal, M.C. Sykes, N. Maple, R. Simpson, S. Lynne, S. Shahidi, M.I. Zegeye, B. Forte, P. Khonsari, G. Thomas, O. Sitta, V. Robertson, K. Mazan, J. Prest-Smith, D. O'Reilly, A. Sreh, A.E. Salih, Anna Craig-Mcquaide, Vandana Agarwal, E.G. Chisholm, Z. Afzal, G.L. de Bernier, P.W. Stather, Lucy Elliott, A. Collins, D. Lim, M. Abdelhadi, Q. Lu, and J. Stein

Subjects
Adult, Male, medicine.medical_specialty, Adolescent, Critical Care, medicine.medical_treatment, Patient Care Planning, Young Adult, 03 medical and health sciences, Patient Admission, 0302 clinical medicine, 030202 anesthesiology, Laparotomy, Intensive care, medicine, Humans, Hospital Mortality, Prospective Studies, Prospective cohort study, Digestive System Surgical Procedures, Aged, Aged, 80 and over, Postoperative Care, business.industry, Patient Selection, Professional Practice, Odds ratio, Middle Aged, United Kingdom, Confidence interval, Anesthesiology and Pain Medicine, Cohort, Emergency medicine, Female, Observational study, Emergencies, business, Ireland, Abdominal surgery
Abstract

Patient selection for critical care admission must balance patient safety with optimal resource allocation. This study aimed to determine the relationship between critical care admission, and postoperative mortality after abdominal surgery.This prespecified secondary analysis of a multicentre, prospective, observational study included consecutive patients enrolled in the DISCOVER study from UK and Republic of Ireland undergoing major gastrointestinal and liver surgery between October and December 2014. The primary outcome was 30-day mortality. Multivariate logistic regression was used to explore associations between critical care admission (planned and unplanned) and mortality, and inter-centre variation in critical care admission after emergency laparotomy.Of 4529 patients included, 37.8% (n=1713) underwent planned critical care admissions from theatre. Some 3.1% (n=86/2816) admitted to ward-level care subsequently underwent unplanned critical care admission. Overall 30-day mortality was 2.9% (n=133/4519), and the risk-adjusted association between 30-day mortality and critical care admission was higher in unplanned [odds ratio (OR): 8.65, 95% confidence interval (CI): 3.51-19.97) than planned admissions (OR: 2.32, 95% CI: 1.43-3.85). Some 26.7% of patients (n=1210/4529) underwent emergency laparotomies. After adjustment, 49.3% (95% CI: 46.8-51.9%, P0.001) were predicted to have planned critical care admissions, with 7% (n=10/145) of centres outside the 95% CI.After risk adjustment, no 30-day survival benefit was identified for either planned or unplanned postoperative admissions to critical care within this cohort. This likely represents appropriate admission of the highest-risk patients. Planned admissions in selected, intermediate-risk patients may present a strategy to mitigate the risk of unplanned admission. Substantial inter-centre variation exists in planned critical care admissions after emergency laparotomies.

Published
2019

69. Location of MMPs in human radicular dentin and the effects of MMPs inhibitor on the bonding stability of fiber posts to radicular dentin

Author

H.H. Yu, J. Liu, Z.X. Liao, F. Yu, B.Y. Qiu, M.D. Zhou, F. Li, J.H. Chen, W. Zhou, and L. Zhang

Subjects
Dental Bonding, Biomedical Engineering, Matrix Metalloproteinase Inhibitors, Resin Cements, Biomaterials, Matrix Metalloproteinase 8, Mechanics of Materials, Adhesives, Dentin-Bonding Agents, Dentin, Materials Testing, Humans, Matrix Metalloproteinase 2, Matrix Metalloproteinase 3
Abstract

This study explored the location of MMP-2, -3, -8 in human root dentin and the inhibition of EGCG/EGCG-3Me on dentin-originated collagen proteases activities. Also, the study evaluated EGCG/EGCG-3Me modified etch-and-rinse adhesives (Single Bond 2, SB 2) for their bonding stabilities to intraradicular dentin. Immunostaining and liquid chip analysis demonstrated that MMP-2 and MMP-8 are widely distributed in root dentin while MMP-3 shows a higher fluorescence intensity in the middle and apical third of the root. The contents of MMP-2, -3 and -8 varies in different locations of human tooth root and MMP-2 has the highest content than MMP-3 and MMP-8 at each third of teeth root. Both EGCG and EGCG-3Me showed an inhibitory effect on the root dentin-derived MMPs in a concentration dependent manner (P 0.05) and the inhibitory activity of EGCG-3ME was stronger than that of EGCG at the same concentration (P 0.05). EGCG and EGCG-3Me were incorporated separately into the adhesive SB 2 at concentrations of 200, and 400 μg/mL respectively. The immediate push-out strength of SB 2 was not compromised by EGCG/EGCG-3Me modification. EGCG/EGCG-3Me modified adhesive had higher push-out strength than SB 2 after thermocycling, showing no correlation with concentration.

Published
2022

71. Preparation and compression performance of porous magnesium alloy composite with ceramic hollow spheres

Author

S. Song, P.S. Liu, and J.H. Chen

Subjects
Materials science, Mechanical Engineering, Alloy, Composite number, Metals and Alloys, engineering.material, Microstructure, Specific strength, Compressive strength, Mechanics of Materials, visual_art, Materials Chemistry, visual_art.visual_art_medium, engineering, Ceramic, Composite material, Magnesium alloy, Porous medium
Abstract

Using two different ceramic hollow spheres (the commercial alumina hollow sphere and the self-made silicon-containing ceramic hollow sphere) as reinforcements, two kinds of lightweight porous magnesium alloy composite materials were successfully fabricated by sintering at 600 °C for 3 h 20 min. The microstructure of samples with the self-made silicon-containing ceramic hollow sphere reveals that an alloy phase containing MgO and Mg2Si was formed by an interfacial reaction at the interface between the magnesium alloy and the self-made ceramic hollow sphere. The formation of the alloy phase is beneficial to improve the mechanical properties of the sample. The influence of different types of ceramic hollow spheres on the apparent density, compressive strength, specific strength, energy absorption, and energy absorption efficiency was studied for these porous products. The results show that the apparent density of these two porous samples is markedly lower than that of the magnesium alloy. The Compression curves of both samples have the elastic stage, the yield platform, and the densification stage, which are the typical compression characteristics of porous materials. The compressive strength and specific strength of the samples made by self-made silicon-containing ceramic hollow spheres are both significantly higher than those made by commercial alumina hollow spheres. Moreover, the energy absorption performance of the sample made by self-made silicon-containing ceramic hollow spheres is better than that of the sample made by alumina hollow spheres. The higher energy absorption capacity and the wider strain range of maintaining the maximum energy absorption efficiency mean the sample made by self-made silicon-containing ceramic hollow spheres can absorb more energy.

Published
2022

73. DS_10.1177_0022034520913540 – Supplemental material for Evaluation of a Collagen-Reactive Monomer with Advanced Bonding Durability

Author

F. Yu, M.L. Luo, R.C. Xu, L. Huang, W. Zhou, J. Li, F.R. Tay, L.N. Niu, and J.H. Chen

Subjects
110599 Dentistry not elsewhere classified, FOS: Materials engineering, FOS: Clinical medicine, 91299 Materials Engineering not elsewhere classified
Abstract

Supplemental material, DS_10.1177_0022034520913540 for Evaluation of a Collagen-Reactive Monomer with Advanced Bonding Durability by F. Yu, M.L. Luo, R.C. Xu, L. Huang, W. Zhou, J. Li, F.R. Tay, L.N. Niu and J.H. Chen in Journal of Dental Research

Published
2020
Full Text
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74. Correlation measurements between flow harmonics in Au+Au collisions at RHIC

Author

J. Adam, L. Adamczyk, J.R. Adams, J.K. Adkins, G. Agakishiev, M.M. Aggarwal, Z. Ahammed, N.N. Ajitanand, I. Alekseev, D.M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E.C. Aschenauer, M.U. Ashraf, F. Atetalla, A. Attri, G.S. Averichev, X. Bai, V. Bairathi, K. Barish, A.J. Bassill, A. Behera, R. Bellwied, A. Bhasin, A.K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L.C. Bland, I.G. Bordyuzhin, J. Bouchet, J.D. Brandenburg, A.V. Brandin, D. Brown, J. Bryslawskyj, I. Bunzarov, J. Butterworth, H. Caines, M. Calderón de la Barca Sánchez, J.M. Campbell, D. Cebra, I. Chakaberia, P. Chaloupka, F.-H. Chang, Z. Chang, N. Chankova-Bunzarova, A. Chatterjee, S. Chattopadhyay, J.H. Chen, X. Chen, J. Cheng, M. Cherney, W. Christie, G. Contin, H.J. Crawford, S. Das, T.G. Dedovich, I.M. Deppner, A.A. Derevschikov, L. Didenko, C. Dilks, X. Dong, J.L. Drachenberg, J.C. Dunlop, L.G. Efimov, N. Elsey, J. Engelage, G. Eppley, R. Esha, S. Esumi, O. Evdokimov, J. Ewigleben, O. Eyser, R. Fatemi, S. Fazio, P. Federic, P. Federicova, J. Fedorisin, Z. Feng, P. Filip, E. Finch, Y. Fisyak, C.E. Flores, L. Fulek, C.A. Gagliardi, F. Geurts, A. Gibson, D. Grosnick, D.S. Gunarathne, Y. Guo, A. Gupta, W. Guryn, A.I. Hamad, A. Hamed, A. Harlenderova, J.W. Harris, L. He, S. Heppelmann, N. Herrmann, A. Hirsch, L. Holub, S. Horvat, X. Huang, B. Huang, S.L. Huang, T. Huang, H.Z. Huang, T.J. Humanic, P. Huo, G. Igo, W.W. Jacobs, A. Jentsch, J. Jia, K. Jiang, S. Jowzaee, E.G. Judd, S. Kabana, D. Kalinkin, K. Kang, D. Kapukchyan, K. Kauder, H.W. Ke, D. Keane, A. Kechechyan, D.P. Kikoła, C. Kim, T.A. Kinghorn, I. Kisel, A. Kisiel, L. Kochenda, L.K. Kosarzewski, A.F. Kraishan, L. Kramarik, L. Krauth, P. Kravtsov, K. Krueger, N. Kulathunga, S. Kumar, L. Kumar, J. Kvapil, J.H. Kwasizur, R. Lacey, J.M. Landgraf, K.D. Landry, J. Lauret, A. Lebedev, R. Lednicky, J.H. Lee, Y. Li, W. Li, X. Li, C. Li, J. Lidrych, T. Lin, M.A. Lisa, Y. Liu, H. Liu, F. Liu, P. Liu, T. Ljubicic, W.J. Llope, M. Lomnitz, R.S. Longacre, S. Luo, X. Luo, R. Ma, Y.G. Ma, G.L. Ma, L. Ma, N. Magdy, R. Majka, D. Mallick, S. Margetis, C. Markert, H.S. Matis, O. Matonoha, D. Mayes, J.A. Mazer, K. Meehan, J.C. Mei, N.G. Minaev, S. Mioduszewski, D. Mishra, S. Mizuno, B. Mohanty, M.M. Mondal, I. Mooney, D.A. Morozov, M.K. Mustafa, Md. Nasim, T.K. Nayak, J.D. Negrete, J.M. Nelson, D.B. Nemes, M. Nie, G. Nigmatkulov, T. Niida, L.V. Nogach, T. Nonaka, S.B. Nurushev, G. Odyniec, A. Ogawa, K. Oh, V.A. Okorokov, D. Olvitt, B.S. Page, R. Pak, Y. Panebratsev, B. Pawlik, H. Pei, C. Perkins, J. Pluta, K. Poniatowska, J. Porter, M. Posik, N.K. Pruthi, M. Przybycien, J. Putschke, A. Quintero, S.K. Radhakrishnan, S. Ramachandran, R.L. Ray, R. Reed, H.G. Ritter, J.B. Roberts, O.V. Rogachevskiy, J.L. Romero, L. Ruan, J. Rusnak, O. Rusnakova, N.R. Sahoo, P.K. Sahu, S. Salur, J. Sandweiss, J. Schambach, A.M. Schmah, W.B. Schmidke, N. Schmitz, B.R. Schweid, J. Seger, M. Sergeeva, R. Seto, P. Seyboth, N. Shah, E. Shahaliev, P.V. Shanmuganathan, M. Shao, W.Q. Shen, F. Shen, Z. Shi, S.S. Shi, Q.Y. Shou, E.P. Sichtermann, R. Sikora, M. Simko, S. Singha, D. Smirnov, N. Smirnov, W. Solyst, P. Sorensen, H.M. Spinka, B. Srivastava, T.D.S. Stanislaus, D.J. Stewart, M. Strikhanov, B. Stringfellow, A.A.P. Suaide, T. Sugiura, M. Sumbera, B. Summa, X.M. Sun, X. Sun, Y. Sun, B. Surrow, D.N. Svirida, A.H. Tang, Z. Tang, A. Taranenko, T. Tarnowsky, J. Thäder, J.H. Thomas, A.R. Timmins, D. Tlusty, T. Todoroki, M. Tokarev, C.A. TomKiel, S. Trentalange, R.E. Tribble, P. Tribedy, S.K. Tripathy, B.A. Trzeciak, O.D. Tsai, B. Tu, T. Ullrich, D.G. Underwood, I. Upsal, G. Van Buren, J. Vanek, A.N. Vasiliev, I. Vassiliev, F. Videbæk, S. Vokal, S.A. Voloshin, A. Vossen, F. Wang, G. Wang, Y. Wang, J.C. Webb, G. Webb, L. Wen, G.D. Westfall, H. Wieman, S.W. Wissink, R. Witt, Y. Wu, Z.G. Xiao, W. Xie, G. Xie, Z. Xu, J. Xu, Q.H. Xu, Y.F. Xu, N. Xu, C. Yang, S. Yang, Q. Yang, Y. Yang, Z. Ye, L. Yi, K. Yip, I.-K. Yoo, N. Yu, H. Zbroszczyk, W. Zha, J.B. Zhang, X.P. Zhang, S. Zhang, Z. Zhang, L. Zhang, J. Zhang, Y. Zhang, J. Zhao, C. Zhong, C. Zhou, L. Zhou, Z. Zhu, X. Zhu, M. Zyzak, Adam, J., Adamczyk, L., Adams, J. R., Adkins, J. K., Agakishiev, G., Aggarwal, M. M., Ahammed, Z., Ajitanand, N. N., Alekseev, I., Anderson, D. M., Aoyama, R., Aparin, A., Arkhipkin, D., Aschenauer, E. C., Ashraf, M. U., Atetalla, F., Attri, A., Averichev, G. S., Bai, X., Bairathi, V., Barish, K., Bassill, A. J., Behera, A., Bellwied, R., Bhasin, A., Bhati, A. K., Bhattarai, P., Bielcik, J., Bielcikova, J., Bland, L. C., Bordyuzhin, I. G., Bouchet, J., Brandenburg, J. D., Brandin, A. V., Brown, D., Bryslawskyj, J., Bunzarov, I., Butterworth, J., Caines, H., Calderón de la Barca Sánchez, M., Campbell, J. M., Cebra, D., Chakaberia, I., Chaloupka, P., Chang, F. -H., Chang, Z., Chankova-Bunzarova, N., Chatterjee, A., Chattopadhyay, S., Chen, J. H., Chen, X., Cheng, J., Cherney, M., Christie, W., Contin, G., Crawford, H. J., Das, S., Dedovich, T. G., Deppner, I. M., Derevschikov, A. A., Didenko, L., Dilks, C., Dong, X., Drachenberg, J. L., Dunlop, J. C., Efimov, L. G., Elsey, N., Engelage, J., Eppley, G., Esha, R., Esumi, S., Evdokimov, O., Ewigleben, J., Eyser, O., Fatemi, R., Fazio, S., Federic, P., Federicova, P., Fedorisin, J., Feng, Z., Filip, P., Finch, E., Fisyak, Y., Flores, C. E., Fulek, L., Gagliardi, C. A., Geurts, F., Gibson, A., Grosnick, D., Gunarathne, D. S., Guo, Y., Gupta, A., Guryn, W., Hamad, A. I., Hamed, A., Harlenderova, A., Harris, J. W., He, L., Heppelmann, S., Herrmann, N., Hirsch, A., Holub, L., Horvat, S., Huang, X., Huang, B., Huang, S. L., Huang, T., Huang, H. Z., Humanic, T. J., Huo, P., Igo, G., Jacobs, W. W., Jentsch, A., Jia, J., Jiang, K., Jowzaee, S., Judd, E. G., Kabana, S., Kalinkin, D., Kang, K., Kapukchyan, D., Kauder, K., Ke, H. W., Keane, D., Kechechyan, A., Kikoła, D. P., Kim, C., Kinghorn, T. A., Kisel, I., Kisiel, A., Kochenda, L., Kosarzewski, L. K., Kraishan, A. F., Kramarik, L., Krauth, L., Kravtsov, P., Krueger, K., Kulathunga, N., Kumar, S., Kumar, L., Kvapil, J., Kwasizur, J. H., Lacey, R., Landgraf, J. M., Landry, K. D., Lauret, J., Lebedev, A., Lednicky, R., Lee, J. H., Li, Y., Li, W., Li, X., Li, C., Lidrych, J., Lin, T., Lisa, M. A., Liu, Y., Liu, H., Liu, F., Liu, P., Ljubicic, T., Llope, W. J., Lomnitz, M., Longacre, R. S., Luo, S., Luo, X., Ma, R., Ma, Y. G., Ma, G. L., Ma, L., Magdy, N., Majka, R., Mallick, D., Margetis, S., Markert, C., Matis, H. S., Matonoha, O., Mayes, D., Mazer, J. A., Meehan, K., Mei, J. C., Minaev, N. G., Mioduszewski, S., Mishra, D., Mizuno, S., Mohanty, B., Mondal, M. M., Mooney, I., Morozov, D. A., Mustafa, M. K., Nasim, Md., Nayak, T. K., Negrete, J. D., Nelson, J. M., Nemes, D. B., Nie, M., Nigmatkulov, G., Niida, T., Nogach, L. V., Nonaka, T., Nurushev, S. B., Odyniec, G., Ogawa, A., Oh, K., Okorokov, V. A., Olvitt, D., Page, B. S., Pak, R., Panebratsev, Y., Pawlik, B., Pei, H., Perkins, C., Pluta, J., Poniatowska, K., Porter, J., Posik, M., Pruthi, N. K., Przybycien, M., Putschke, J., Quintero, A., Radhakrishnan, S. K., Ramachandran, S., Ray, R. L., Reed, R., Ritter, H. G., Roberts, J. B., Rogachevskiy, O. V., Romero, J. L., Ruan, L., Rusnak, J., Rusnakova, O., Sahoo, N. R., Sahu, P. K., Salur, S., Sandweiss, J., Schambach, J., Schmah, A. M., Schmidke, W. B., Schmitz, N., Schweid, B. R., Seger, J., Sergeeva, M., Seto, R., Seyboth, P., Shah, N., Shahaliev, E., Shanmuganathan, P. V., Shao, M., Shen, W. Q., Shen, F., Shi, Z., Shi, S. S., Shou, Q. Y., Sichtermann, E. P., Sikora, R., Simko, M., Singha, S., Smirnov, D., Smirnov, N., Solyst, W., Sorensen, P., Spinka, H. M., Srivastava, B., Stanislaus, T. D. S., Stewart, D. J., Strikhanov, M., Stringfellow, B., Suaide, A. A. P., Sugiura, T., Sumbera, M., Summa, B., Sun, X. M., Sun, X., Sun, Y., Surrow, B., Svirida, D. N., Tang, A. H., Tang, Z., Taranenko, A., Tarnowsky, T., Thäder, J., Thomas, J. H., Timmins, A. R., Tlusty, D., Todoroki, T., Tokarev, M., Tomkiel, C. A., Trentalange, S., Tribble, R. E., Tribedy, P., Tripathy, S. K., Trzeciak, B. A., Tsai, O. D., Tu, B., Ullrich, T., Underwood, D. G., Upsal, I., Van Buren, G., Vanek, J., Vasiliev, A. N., Vassiliev, I., Videbæk, F., Vokal, S., Voloshin, S. A., Vossen, A., Wang, F., Wang, G., Wang, Y., Webb, J. C., Webb, G., Wen, L., Westfall, G. D., Wieman, H., Wissink, S. W., Witt, R., Wu, Y., Xiao, Z. G., Xie, W., Xie, G., Xu, Z., Xu, J., Xu, Q. H., Xu, Y. F., Xu, N., Yang, C., Yang, S., Yang, Q., Yang, Y., Ye, Z., Yi, L., Yip, K., Yoo, I. -K., Yu, N., Zbroszczyk, H., Zha, W., Zhang, J. B., Zhang, X. P., Zhang, S., Zhang, Z., Zhang, L., Zhang, J., Zhang, Y., Zhao, J., Zhong, C., Zhou, C., Zhou, L., Zhu, Z., Zhu, X., and Zyzak, M.

Subjects
Physics, Nuclear and High Energy Physics, Collectivity, Correlation, Shear viscosity, 010308 nuclear & particles physics, FOS: Physical sciences, 01 natural sciences, Measure (mathematics), High Energy Physics - Experiment, Nuclear physics, Nonlinear system, Third order, High Energy Physics - Experiment (hep-ex), Distribution (mathematics), Harmonics, 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Anisotropy, Nuclear Experiment, Cumulant, Fourier series
Abstract

Flow harmonics ($v_n$) in the Fourier expansion of the azimuthal distribution of particles are widely used to quantify the anisotropy in particle emission in high-energy heavy-ion collisions. The symmetric cumulants, $SC(m,n)$, are used to measure the correlations between different orders of flow harmonics. These correlations are used to constrain the initial conditions and the transport properties of the medium in theoretical models. In this Letter, we present the first measurements of the four-particle symmetric cumulants in Au+Au collisions at $\sqrt{s_{NN}}$ = 39 and 200 GeV from data collected by the STAR experiment at RHIC. We observe that $v_{2}$ and $v_{3}$ are anti-correlated in all centrality intervals with similar correlation strengths from 39 GeV Au+Au to 2.76 TeV Pb+Pb (measured by the ALICE experiment). The $v_{2}$-$v_{4}$ correlation seems to be stronger at 39 GeV than at higher collision energies. The initial-stage anti-correlations between second and third order eccentricities are sufficient to describe the measured correlations between $v_{2}$ and $v_{3}$. The best description of $v_{2}$-$v_{4}$ correlations at $\sqrt{s_{NN}}$ = 200 GeV is obtained with inclusion of the system's nonlinear response to initial eccentricities accompanied by the viscous effect with $\eta/s$ $>$ 0.08. Theoretical calculations using different initial conditions, equations of state and viscous coefficients need to be further explored to extract $\eta/s$ of the medium created at RHIC., Comment: 4 figures, Accepted for publication in Physics Letter B, and final version

Published
2018

75. Influence of processing on surface morphology and specific surface area for the nickel foam made by electrodeposition

Author

Peisheng Liu, B. Chen, and J.H. Chen

Subjects
010302 applied physics, chemistry.chemical_classification, Materials science, Mechanical Engineering, Sintering, chemistry.chemical_element, 02 engineering and technology, Polymer, Metal foam, 021001 nanoscience & nanotechnology, 01 natural sciences, Decomposition, Permeability (earth sciences), Nickel, chemistry, Mechanics of Materials, Modeling and Simulation, Specific surface area, 0103 physical sciences, General Materials Science, Composite material, 0210 nano-technology, Porosity
Abstract

Purpose With the nickel foam made by the technique of electrodeposition on polymer foam, the purpose of this paper is to investigate the influence of several deferent processes on the surface morphology and the specific surface area of this porous product. Design/methodology/approach The surface morphologies of the nickel foam were examined by SEM. The specific surface area of the porous product was measured by gas (N2) permeability method and also calculated by the reported formula. Findings The nickel foam from sintering in NH3 decomposition atmosphere at 850°C will achieve the same specific surface area as that at 980°C, whether this porous structure after electrodeposition comes through direct sintering in NH3 decomposition atmosphere, or through burning in air at 600°C for 4 min beforehand then the same reductive sintering. Originality/value There have been some studies on the preparation and application of nickel foam, but few works focus on the processing influence on the specific surface of this porous product. The present work provides the investigations on the difference of the product made under different producing conditions, and the influence of several deferent processes on the specific surface area of the product.

Published
2018

76. Iron oxide recovery from fayalite in water vapor at high temperature

Author

Kuo-Chih Chou, W.J. Mi, B. Li, J.H. Chen, Xinmei Hou, and H.Y. Chen

Subjects
lcsh:TN1-997, magnetite, Materials science, Hydrogen, 020209 energy, Iron oxide, Analytical chemistry, Mineralogy, chemistry.chemical_element, 02 engineering and technology, chemistry.chemical_compound, fayalite, Mineral redox buffer, oxidation behavior, water vapor, 0202 electrical engineering, electronic engineering, information engineering, Materials Chemistry, lcsh:Mining engineering. Metallurgy, Magnetite, Metals and Alloys, Hematite, Geotechnical Engineering and Engineering Geology, Gas analyzer, chemistry, Mechanics of Materials, hydrogen, visual_art, visual_art.visual_art_medium, Fayalite, Water vapor
Abstract

The oxidation behavior of fayalite (Fe2SiO4) in water vapor at 1000?C was investigated. The phase constitution and microstructure of the solid products were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM) with energy dispersive spectrometer (EDS). The gas product was continuously measured online by a gas analyzer. The results showed that fayalite was completely decomposed into magnetite (58.8 wt%), hematite (21.6 wt%) and silica (19.6 wt%) at 1000 ?C for 40 min under water vapor condition. Compared with the result obtained in dry air, water vapor could promote fayalite to transform into magnetite by decreasing oxygen fugacity. In addition, the iron oxide product was further enriched via alkaline cleaning in 1 mol/L NaOH. As for the gas product, the hydrogen production capacity reached 24.41 mL/g when exposed to 50 vol% water-50 vol% Ar at 1000?C for 40 min.

Published
2018

77. Formation of β'-related composite precipitates in relation to enhanced thermal stability of Sc-alloyed Al-Mg-Si alloys

Author

Yutang Liu, J.H. Chen, Sidong Chen, Y.X. Lai, Z.Q. Chen, and Peng Gao

Subjects
Materials science, Mechanical Engineering, Composite number, Alloy, Metals and Alloys, 02 engineering and technology, engineering.material, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Crystallography, Mechanics of Materials, Scanning transmission electron microscopy, Materials Chemistry, engineering, Thermal stability, 0210 nano-technology, Strong binding
Abstract

The Al-Mg-Si alloys added with trace Sc demonstrates an improved thermal stability, as compared with that without Sc-addition. But the microstructural origin of the enhanced property is unclear. In the present study, the precipitates formed in an Al-Mg-Si-Sc alloy were studied in detail by atomic-resolution scanning transmission electron microscopy. It is shown that the dominant precipitates formed at the peak-aging condition are the disordered β" precipitates consisting of Sc-free β" sub-units and Sc-containing disordered regions, rather than the well-ordered β". Upon further aging, these disordered β" precipitates will evolve to β"/β'/B′/U2 composite precipitates. The formation of the composite precipitates is probably associated with the strong binding between Sc and Si atoms, and with the non-preference for Sc atoms to occupy the atomic sites of the β"-structure. Our study reveals the following: It is the formation of stabilized β"-related composite precipitates that enhances the thermal stability of the Sc-added Al-Mg-Si alloy.

Published
2021

78. Sample size effect on the dynamic torsional behaviour of the 2A12 aluminium alloy

Author

Wen Jun Hu, W.F. Xu, J.H. Chen, Fang Ju Zhang, Ruo Ze Xie, Gang Chen, and Xicheng Huang

Subjects
Environmental Engineering, Materials science, Alloy, Biomedical Engineering, Computational Mechanics, Aerospace Engineering, Ocean Engineering, 02 engineering and technology, engineering.material, Stress (mechanics), 0203 mechanical engineering, Aluminium alloy, Composite material, Dynamic torsion, Civil and Structural Engineering, Stress concentration, Stress distribution, business.industry, Mechanical Engineering, Finite element analysis, Structural engineering, Split-Hopkinson pressure bar, 021001 nanoscience & nanotechnology, Sample (graphics), Finite element method, Sample size effect, 020303 mechanical engineering & transports, lcsh:TA1-2040, Mechanics of Materials, Sample size determination, visual_art, visual_art.visual_art_medium, engineering, Torsional split Hopkinson bar, lcsh:Engineering (General). Civil engineering (General), 0210 nano-technology, business
Abstract

In order to investigate the effect of sample size on the dynamic torsional behaviour of the 2A12 aluminium alloy. In this paper, torsional split Hopkinson bar tests are conducted on this alloy with different sample dimensions. It is found that with the decreasing gauge length and thickness, the tested yield strength increases. However, the sample inner/outer diameter has little effect on the dynamic torsional behaviour. Based on the finite element method, the stress states in the alloy with different sample sizes are analysed. Due to the effect of stress concentration zone (SCZ), the shorter sample has a higher yield stress. Furthermore, the stress distributes more uniformly in the thinner sample, which leads to the higher tested yield stress. According to the experimental and simulation analysis, some suggestions on choosing the sample size are given as well.

Published
2017

79. Energy dependence of J/ψ production in Au + Au collisions at sNN=39,62.4 and 200GeV

Author

L. Adamczyk, J.K. Adkins, G. Agakishiev, M.M. Aggarwal, Z. Ahammed, N.N. Ajitanand, I. Alekseev, D.M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E.C. Aschenauer, M.U. Ashraf, A. Attri, G.S. Averichev, X. Bai, V. Bairathi, A. Behera, R. Bellwied, A. Bhasin, A.K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L.C. Bland, I.G. Bordyuzhin, J. Bouchet, J.D. Brandenburg, A.V. Brandin, D. Brown, I. Bunzarov, J. Butterworth, H. Caines, M. Calderón de la Barca Sánchez, J.M. Campbell, D. Cebra, I. Chakaberia, P. Chaloupka, Z. Chang, N. Chankova-Bunzarova, A. Chatterjee, S. Chattopadhyay, X. Chen, J.H. Chen, J. Cheng, M. Cherney, W. Christie, G. Contin, H.J. Crawford, S. Das, L.C. De Silva, R.R. Debbe, T.G. Dedovich, J. Deng, A.A. Derevschikov, L. Didenko, C. Dilks, X. Dong, J.L. Drachenberg, J.E. Draper, L.E. Dunkelberger, J.C. Dunlop, L.G. Efimov, N. Elsey, J. Engelage, G. Eppley, R. Esha, S. Esumi, O. Evdokimov, J. Ewigleben, O. Eyser, R. Fatemi, S. Fazio, P. Federic, P. Federicova, J. Fedorisin, Z. Feng, P. Filip, E. Finch, Y. Fisyak, C.E. Flores, J. Fujita, L. Fulek, C.A. Gagliardi, D. Garand, F. Geurts, A. Gibson, M. Girard, D. Grosnick, D.S. Gunarathne, Y. Guo, A. Gupta, S. Gupta, W. Guryn, A.I. Hamad, A. Hamed, A. Harlenderova, J.W. Harris, L. He, S. Heppelmann, A. Hirsch, G.W. Hoffmann, S. Horvat, B. Huang, H.Z. Huang, T. Huang, X. Huang, T.J. Humanic, P. Huo, G. Igo, W.W. Jacobs, A. Jentsch, J. Jia, K. Jiang, S. Jowzaee, E.G. Judd, S. Kabana, D. Kalinkin, K. Kang, K. Kauder, H.W. Ke, D. Keane, A. Kechechyan, Z. Khan, D.P. Kikoła, I. Kisel, A. Kisiel, L. Kochenda, M. Kocmanek, T. Kollegger, L.K. Kosarzewski, A.F. Kraishan, P. Kravtsov, K. Krueger, N. Kulathunga, L. Kumar, J. Kvapil, J.H. Kwasizur, R. Lacey, J.M. Landgraf, K.D. Landry, J. Lauret, A. Lebedev, R. Lednicky, J.H. Lee, Y. Li, X. Li, W. Li, C. Li, J. Lidrych, T. Lin, M.A. Lisa, Y. Liu, H. Liu, F. Liu, P. Liu, T. Ljubicic, W.J. Llope, M. Lomnitz, R.S. Longacre, S. Luo, X. Luo, G.L. Ma, L. Ma, Y.G. Ma, R. Ma, N. Magdy, R. Majka, D. Mallick, S. Margetis, C. Markert, H.S. Matis, K. Meehan, J.C. Mei, Z.W. Miller, N.G. Minaev, S. Mioduszewski, D. Mishra, S. Mizuno, B. Mohanty, M.M. Mondal, D.A. Morozov, M.K. Mustafa, Md. Nasim, T.K. Nayak, J.M. Nelson, M. Nie, G. Nigmatkulov, T. Niida, L.V. Nogach, T. Nonaka, S.B. Nurushev, G. Odyniec, A. Ogawa, K. Oh, V.A. Okorokov, D. Olvitt, B.S. Page, R. Pak, Y. Pandit, Y. Panebratsev, B. Pawlik, H. Pei, C. Perkins, P. Pile, J. Pluta, K. Poniatowska, J. Porter, M. Posik, N.K. Pruthi, M. Przybycien, J. Putschke, H. Qiu, A. Quintero, S. Ramachandran, R.L. Ray, R. Reed, M.J. Rehbein, H.G. Ritter, J.B. Roberts, O.V. Rogachevskiy, J.L. Romero, J.D. Roth, L. Ruan, J. Rusnak, O. Rusnakova, N.R. Sahoo, P.K. Sahu, S. Salur, J. Sandweiss, M. Saur, J. Schambach, A.M. Schmah, W.B. Schmidke, N. Schmitz, B.R. Schweid, J. Seger, M. Sergeeva, P. Seyboth, N. Shah, E. Shahaliev, P.V. Shanmuganathan, M. Shao, A. Sharma, M.K. Sharma, W.Q. Shen, S.S. Shi, Z. Shi, Q.Y. Shou, E.P. Sichtermann, R. Sikora, M. Simko, S. Singha, M.J. Skoby, N. Smirnov, D. Smirnov, W. Solyst, L. Song, P. Sorensen, H.M. Spinka, B. Srivastava, T.D.S. Stanislaus, M. Strikhanov, B. Stringfellow, T. Sugiura, M. Sumbera, B. Summa, X. Sun, Y. Sun, X.M. Sun, B. Surrow, D.N. Svirida, A.H. Tang, Z. Tang, A. Taranenko, T. Tarnowsky, A. Tawfik, J. Thäder, J.H. Thomas, A.R. Timmins, D. Tlusty, T. Todoroki, M. Tokarev, S. Trentalange, R.E. Tribble, P. Tribedy, S.K. Tripathy, B.A. Trzeciak, O.D. Tsai, T. Ullrich, D.G. Underwood, I. Upsal, G. Van Buren, G. van Nieuwenhuizen, A.N. Vasiliev, F. Videbæk, S. Vokal, S.A. Voloshin, A. Vossen, G. Wang, Y. Wang, F. Wang, J.C. Webb, G. Webb, L. Wen, G.D. Westfall, H. Wieman, S.W. Wissink, R. Witt, Y. Wu, Z.G. Xiao, W. Xie, G. Xie, J. Xu, N. Xu, Q.H. Xu, Y.F. Xu, Z. Xu, Y. Yang, Q. Yang, C. Yang, S. Yang, Z. Ye, L. Yi, K. Yip, I.-K. Yoo, N. Yu, H. Zbroszczyk, W. Zha, Z. Zhang, X.P. Zhang, J.B. Zhang, S. Zhang, J. Zhang, Y. Zhang, J. Zhao, C. Zhong, L. Zhou, C. Zhou, X. Zhu, Z. Zhu, and M. Zyzak

Subjects
Quark, Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Screening effect, Nuclear Theory, Fermion, 01 natural sciences, Spectral line, Particle detector, Nuclear physics, 0103 physical sciences, Production (computer science), Nuclear Experiment, 010306 general physics, Recombination, STAR detector
Abstract

The inclusive J / ψ transverse momentum spectra and nuclear modification factors are reported at mid-rapidity ( | y | 1.0 ) in Au + Au collisions at s N N = 39, 62.4 and 200 GeV taken by the STAR experiment. A suppression of J / ψ production, with respect to the production in p + p scaled by the number of binary nucleon–nucleon collisions, is observed in central Au + Au collisions at these three energies. No significant energy dependence of nuclear modification factors is found within uncertainties. The measured nuclear modification factors can be described by model calculations that take into account both suppression of direct J / ψ production due to the color screening effect and J / ψ regeneration from recombination of uncorrelated charm–anticharm quark pairs.

Published
2017

80. Allelopathic effects of Solidago canadensis L. between the leaf litter and green leaf

Author

Y .L. Liao, D.L. Du, J.H. Chen, P. Huang, J.F. Sun, H. Zhang, Zhi-Cong Dai, X.Y . Wang, and W.W. Zhang

Subjects
0106 biological sciences, biology, 010604 marine biology & hydrobiology, Botany, Plant Science, Plant litter, Solidago canadensis, biology.organism_classification, 010603 evolutionary biology, 01 natural sciences, Agronomy and Crop Science, Green leaf, Allelopathy
Published
2017

81. Microstructure and property evolution of Fe-N ferrite undergoing early-stages of precipitation

Author

L. Tian, Q. Xu, J.H. Chen, N. Li, Y. Hong, and C.L. Wu

Subjects
010302 applied physics, Materials science, Precipitation (chemistry), Mechanical Engineering, Alloy, 02 engineering and technology, engineering.material, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Microstructure, 01 natural sciences, Crystallography, Mechanics of Materials, Transmission electron microscopy, Ferrite (iron), 0103 physical sciences, engineering, Hardening (metallurgy), General Materials Science, Tempering, 0210 nano-technology
Abstract

The precipitation-hardening phenomenon is well-known in nitrogen-supersaturated ferrite and its precipitation sequence has received extensive attention. Thus far the α″-Fe 16 N 2 phase has been known as the main hardening precipitates in the alloy upon ageing at low temperatures. Here we report that distinct precursors (pre-α″) of the α″-phase exist and they also play a crucial role in the precipitation-hardened alloy. Using (in-situ) high-resolution transmission electron microscopy, property characterization and first-principle energy calculations in association with varying thermal processes, it is shown that lying on the {001} α planes, the pre-α″ precipitates have a plate-like morphology and are the major hardening precipitates in natural aged Fe-N ferrite. They are stable without much change even after tempering at 60 °C for 2 h. Furthermore, the plate-like pre-α″ precipitates typically consist of needle-like domains, due to energy minimization. The in-situ observations demonstrate that the precipitation sequence upon ageing is as follows: N-supersaturated α-Fe→N-rich clusters→pre-α″ (GP zones)→α″, where GP zones stands for Guinier-Prestone zones. The pre-α″ precipitates can have even more significant effects on properties of the alloy, as compared with the well-known α″ precipitates.

Published
2017

82. Near infrared spectroscopy: A new technique for assessing erectile function

Author

F.S. Tsai, H-C. Chang, Y.-K. Chang, F.C. Hung, T-D. Wang, W-L. Huang, J-T. Hsieh, J.H. Chen, M.T. Lo, Y.H. Peng, and C. Lin

Subjects
Materials science, Nuclear magnetic resonance, Urology, Near-infrared spectroscopy, Erectile function, lcsh:Diseases of the genitourinary system. Urology, lcsh:RC870-923, lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens, lcsh:RC254-282
Published
2020

83. Mechanical properties enhanced by deformation-modified precipitation of θ′-phase approximants in an Al-Cu alloy

Author

Chunhui Liu, J.H. Chen, Limei Liu, C.L. Wu, and P.P. Ma

Subjects
010302 applied physics, Materials science, Precipitation (chemistry), Mechanical Engineering, Alloy, Metallurgy, technology, industry, and agriculture, 02 engineering and technology, engineering.material, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Tetragonal crystal system, Precipitation hardening, Mechanics of Materials, 0103 physical sciences, Scanning transmission electron microscopy, engineering, General Materials Science, Deformation (engineering), Dislocation, 0210 nano-technology, Ductility
Abstract

The influence of large pre-deformation on the age hardening behaviors, tensile properties and precipitate characteristics in an Al-Cu alloy during artificial ageing was investigated using mechanical property measurements and electron microscopy. Room-temperature rolling of Al-Cu alloy with a thickness reduction of 80% plus a subsequent artificial ageing can result in a strength increase of 35% without sacrificing ductility compared with an alloy that is peak–aged using a conventional heat treatment process (T6). A large quantity of dislocations that accumulated during cold-rolling was retained in the alloy after post-ageing at 150 °C. Although dense dislocation walls and dislocation tangles that exist in cold-rolled Al-Cu alloys were expected to cause micro-structural heterogeneity, the plate-shaped precipitates on the {001} Al planes exhibited an exceptionally uniform distribution. Atomic-scale angular dark-field scanning transmission electron microscopy (ADF-STEM) revealed these precipitates are θ′–approximants with a crystal structure similar with the well–known tetragonal θ′ phase but with the body-centered position not fully occupied by Cu. In addition, the precipitate sizes were considerably refined as compared to the θ′ precipitates that were formed in the T6 peak-aged alloys. The microstructure–property relationships in the alloy are discussed to explain the observations. Our results suggest the deformation-modified precipitation may play a vital role in achieving better strength-ductility synergy.

Published
2016

84. Review of Research on Fault Analysis of Large-Scale Motor-Generator

Author

Lu Ting, Quansheng Zhang, Zhe Hou, Zheng Zhang, Changyu Hong, J.H. Chen, Li Haibo, Wu Min, Di Hongwei, Jiang Mengjiao, and Yawu Zhang

Subjects
Electric power system, Reliability (semiconductor), Power station, Computer science, Power Balance, Scale (chemistry), Fault analysis, Motor–generator, Stability (probability), Reliability engineering
Abstract

Based on power balance and stability of power grid, pumped storage power station plays an important role in modern power system. Motor-generator is the main equipment of a pumped storage power station. The fault rate and operation reliability of motor-generator is directly related to safe and stable operation of the power station and even the power grid. This paper summaries different types of faults with several examples of fault treatment of large-scale motor-generators, and puts forward corresponding countermeasures and suggestions, which provides a good reference for similar fault prevention and diagnosis.

Published
2019

86. Direct, sequential growth of copper film on TaN/Ta barrier substrates by alternation of Pb-UPD and Cu-SLRR

Author

J. S. Fang, Tsung-Shune Chin, Giin-Shan Chen, Y. L. Cheng, and J.H. Chen

Subjects
Materials science, Annealing (metallurgy), 020209 energy, General Chemical Engineering, Inorganic chemistry, chemistry.chemical_element, 02 engineering and technology, 021001 nanoscience & nanotechnology, Electrochemistry, Underpotential deposition, Redox, Copper, Barrier layer, Perchlorate, chemistry.chemical_compound, chemistry, Electrical resistivity and conductivity, 0202 electrical engineering, electronic engineering, information engineering, 0210 nano-technology
Abstract

This study uses an electrochemical form of layer-by-layer deposition to grow Cu films on TaN/Ta barriers without the need for a copper seed layer. The process involves sequential underpotential deposition (UPD) of Pb and surface-limited redox replacement (SLRR) of Cu. Additionally, this work elucidates the influence of pH and Pb deposition potential on the growth mechanism and electrical properties of the resulting Cu films on TaN/Ta barriers. The results demonstrate that during Cu-SLRR, the onset of Cu2+ substitution of Pb2+ is delayed when Pb coverage is increased via deposition at a higher Pb-UPD. This is because perchlorate anions are adsorbed on the underlying UPD-deposited Pb adatoms. Cu films formed at a Pb-UPD of −1150 mV exhibit the lowest resistivity of 7.6 μΩcm in the as-deposited state because these films are formed with the Cu(111) texture. Additionally, the Cu layer remains thermally stable after annealing at 700 °C. The results of this study may be of interest for the fabrication of microelectronics, particularly for forming Cu-interconnections.

Published
2016

87. Di-hadron correlations with identified leading hadrons in 200 GeV Au + Au and d + Au collisions at STAR

Author

L. Adamczyk, J.K. Adkins, G. Agakishiev, M.M. Aggarwal, Z. Ahammed, I. Alekseev, A. Aparin, D. Arkhipkin, E.C. Aschenauer, G.S. Averichev, X. Bai, V. Bairathi, A. Banerjee, R. Bellwied, A. Bhasin, A.K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L.C. Bland, I.G. Bordyuzhin, J. Bouchet, D. Brandenburg, A.V. Brandin, I. Bunzarov, J. Butterworth, H. Caines, M. Calderón de la Barca Sánchez, J.M. Campbell, D. Cebra, M.C. Cervantes, I. Chakaberia, P. Chaloupka, Z. Chang, S. Chattopadhyay, X. Chen, J.H. Chen, J. Cheng, M. Cherney, W. Christie, G. Contin, H.J. Crawford, S. Das, L.C. De Silva, R.R. Debbe, T.G. Dedovich, J. Deng, A.A. Derevschikov, B. di Ruzza, L. Didenko, C. Dilks, X. Dong, J.L. Drachenberg, J.E. Draper, C.M. Du, L.E. Dunkelberger, J.C. Dunlop, L.G. Efimov, J. Engelage, G. Eppley, R. Esha, O. Evdokimov, O. Eyser, R. Fatemi, S. Fazio, P. Federic, J. Fedorisin, Z. Feng, P. Filip, Y. Fisyak, C.E. Flores, L. Fulek, C.A. Gagliardi, D. Garand, F. Geurts, A. Gibson, M. Girard, L. Greiner, D. Grosnick, D.S. Gunarathne, Y. Guo, S. Gupta, A. Gupta, W. Guryn, A. Hamad, A. Hamed, R. Haque, J.W. Harris, L. He, S. Heppelmann, A. Hirsch, G.W. Hoffmann, D.J. Hofman, S. Horvat, T. Huang, B. Huang, H.Z. Huang, X. Huang, P. Huck, T.J. Humanic, G. Igo, W.W. Jacobs, H. Jang, J. Jia, K. Jiang, E.G. Judd, S. Kabana, D. Kalinkin, K. Kang, K. Kauder, H.W. Ke, D. Keane, A. Kechechyan, Z.H. Khan, D.P. Kikoła, A. Kisiel, L. Kochenda, D.D. Koetke, L.K. Kosarzewski, A.F. Kraishan, P. Kravtsov, K. Krueger, L. Kumar, M.A.C. Lamont, J.M. Landgraf, K.D. Landry, J. Lauret, A. Lebedev, R. Lednicky, J.H. Lee, X. Li, W. Li, Z.M. Li, Y. Li, C. Li, M.A. Lisa, F. Liu, T. Ljubicic, W.J. Llope, M. Lomnitz, R.S. Longacre, X. Luo, G.L. Ma, Y.G. Ma, R. Ma, L. Ma, N. Magdy, R. Majka, A. Manion, S. Margetis, C. Markert, H. Masui, H.S. Matis, D. McDonald, K. Meehan, J.C. Mei, N.G. Minaev, S. Mioduszewski, D. Mishra, B. Mohanty, M.M. Mondal, D.A. Morozov, M.K. Mustafa, B.K. Nandi, Md. Nasim, T.K. Nayak, G. Nigmatkulov, T. Niida, L.V. Nogach, S.Y. Noh, J. Novak, S.B. Nurushev, G. Odyniec, A. Ogawa, K. Oh, V. Okorokov, D. Olvitt, B.S. Page, R. Pak, Y.X. Pan, Y. Pandit, Y. Panebratsev, B. Pawlik, H. Pei, C. Perkins, A. Peterson, P. Pile, J. Pluta, K. Poniatowska, J. Porter, M. Posik, A.M. Poskanzer, N.K. Pruthi, J. Putschke, H. Qiu, A. Quintero, S. Ramachandran, R. Raniwala, S. Raniwala, R.L. Ray, H.G. Ritter, J.B. Roberts, O.V. Rogachevskiy, J.L. Romero, A. Roy, L. Ruan, J. Rusnak, O. Rusnakova, N.R. Sahoo, P.K. Sahu, I. Sakrejda, S. Salur, J. Sandweiss, A. Sarkar, J. Schambach, R.P. Scharenberg, A.M. Schmah, W.B. Schmidke, N. Schmitz, J. Seger, P. Seyboth, N. Shah, E. Shahaliev, P.V. Shanmuganathan, M. Shao, B. Sharma, M.K. Sharma, W.Q. Shen, S.S. Shi, Q.Y. Shou, E.P. Sichtermann, R. Sikora, M. Simko, S. Singha, M.J. Skoby, N. Smirnov, D. Smirnov, L. Song, P. Sorensen, H.M. Spinka, B. Srivastava, T.D.S. Stanislaus, M. Stepanov, M. Strikhanov, B. Stringfellow, M. Sumbera, B. Summa, Y. Sun, Z. Sun, X.M. Sun, X. Sun, B. Surrow, D.N. Svirida, M.A. Szelezniak, A.H. Tang, Z. Tang, T. Tarnowsky, A. Tawfik, J.H. Thomas, A.R. Timmins, D. Tlusty, T. Todoroki, M. Tokarev, S. Trentalange, R.E. Tribble, P. Tribedy, S.K. Tripathy, O.D. Tsai, T. Ullrich, D.G. Underwood, I. Upsal, G. Van Buren, G. van Nieuwenhuizen, M. Vandenbroucke, R. Varma, A.N. Vasiliev, R. Vertesi, F. Videbæk, Y.P. Viyogi, S. Vokal, S.A. Voloshin, A. Vossen, J.S. Wang, F. Wang, H. Wang, G. Wang, Y. Wang, G. Webb, J.C. Webb, L. Wen, G.D. Westfall, H. Wieman, S.W. Wissink, R. Witt, Y.F. Wu, null Wu, Z.G. Xiao, W. Xie, K. Xin, H. Xu, Z. Xu, Q.H. Xu, Y.F. Xu, N. Xu, S. Yang, Y. Yang, Q. Yang, C. Yang, Z. Ye, P. Yepes, L. Yi, K. Yip, I.-K. Yoo, N. Yu, H. Zbroszczyk, W. Zha, Y. Zhang, Z. Zhang, J.B. Zhang, J. Zhang, X.P. Zhang, S. Zhang, J. Zhao, C. Zhong, L. Zhou, X. Zhu, Y. Zoulkarneeva, Adamczyk, L., Adkins, J. K., Agakishiev, G., Aggarwal, M. M., Ahammed, Z., Alekseev, I., Aparin, A., Arkhipkin, D., Aschenauer, E. C., Averichev, G. S., Bai, X., Bairathi, V., Banerjee, A., Bellwied, R., Bhasin, A., Bhati, A. K., Bhattarai, P., Bielcik, J., Bielcikova, J., Bland, L. C., Bordyuzhin, I. G., Bouchet, J., Brandenburg, D., Brandin, A. V., Bunzarov, I., Butterworth, J., Caines, H., Calderón de la Barca Sánchez, M., Campbell, J. M., Cebra, D., Cervantes, M. C., Chakaberia, I., Chaloupka, P., Chang, Z., Chattopadhyay, S., Chen, X., Chen, J. H., Cheng, J., Cherney, M., Christie, W., Contin, G., Crawford, H. J., Das, S., De Silva, L. C., Debbe, R. R., Dedovich, T. G., Deng, J., Derevschikov, A. A., di Ruzza, B., Didenko, L., Dilks, C., Dong, X., Drachenberg, J. L., Draper, J. E., Du, C. M., Dunkelberger, L. E., Dunlop, J. C., Efimov, L. G., Engelage, J., Eppley, G., Esha, R., Evdokimov, O., Eyser, O., Fatemi, R., Fazio, S., Federic, P., Fedorisin, J., Feng, Z., Filip, P., Fisyak, Y., Flores, C. E., Fulek, L., Gagliardi, C. A., Garand, D., Geurts, F., Gibson, A., Girard, M., Greiner, L., Grosnick, D., Gunarathne, D. S., Guo, Y., Gupta, S., Gupta, A., Guryn, W., Hamad, A., Hamed, A., Haque, R., Harris, J. W., He, L., Heppelmann, S., Hirsch, A., Hoffmann, G. W., Hofman, D. J., Horvat, S., Huang, T., Huang, B., Huang, H. Z., Huang, X., Huck, P., Humanic, T. J., Igo, G., Jacobs, W. W., Jang, H., Jia, J., Jiang, K., Judd, E. G., Kabana, S., Kalinkin, D., Kang, K., Kauder, K., Ke, H. W., Keane, D., Kechechyan, A., Khan, Z. H., Kikoła, D. P., Kisiel, A., Kochenda, L., Koetke, D. D., Kosarzewski, L. K., Kraishan, A. F., Kravtsov, P., Krueger, K., Kumar, L., Lamont, M. A. C., Landgraf, J. M., Landry, K. D., Lauret, J., Lebedev, A., Lednicky, R., Lee, J. H., Li, X., Li, W., Li, Z. M., Li, Y., Li, C., Lisa, M. A., Liu, F., Ljubicic, T., Llope, W. J., Lomnitz, M., Longacre, R. S., Luo, X., Ma, G. L., Ma, Y. G., Ma, R., Ma, L., Magdy, N., Majka, R., Manion, A., Margetis, S., Markert, C., Masui, H., Matis, H. S., Mcdonald, D., Meehan, K., Mei, J. C., Minaev, N. G., Mioduszewski, S., Mishra, D., Mohanty, B., Mondal, M. M., Morozov, D. A., Mustafa, M. K., Nandi, B. K., Nasim, Md., Nayak, T. K., Nigmatkulov, G., Niida, T., Nogach, L. V., Noh, S. Y., Novak, J., Nurushev, S. B., Odyniec, G., Ogawa, A., Oh, K., Okorokov, V., Olvitt, D., Page, B. S., Pak, R., Pan, Y. X., Pandit, Y., Panebratsev, Y., Pawlik, B., Pei, H., Perkins, C., Peterson, A., Pile, P., Pluta, J., Poniatowska, K., Porter, J., Posik, M., Poskanzer, A. M., Pruthi, N. K., Putschke, J., Qiu, H., Quintero, A., Ramachandran, S., Raniwala, R., Raniwala, S., Ray, R. L., Ritter, H. G., Roberts, J. B., Rogachevskiy, O. V., Romero, J. L., Roy, A., Ruan, L., Rusnak, J., Rusnakova, O., Sahoo, N. R., Sahu, P. K., Sakrejda, I., Salur, S., Sandweiss, J., Sarkar, A., Schambach, J., Scharenberg, R. P., Schmah, A. M., Schmidke, W. B., Schmitz, N., Seger, J., Seyboth, P., Shah, N., Shahaliev, E., Shanmuganathan, P. V., Shao, M., Sharma, B., Sharma, M. K., Shen, W. Q., Shi, S. S., Shou, Q. Y., Sichtermann, E. P., Sikora, R., Simko, M., Singha, S., Skoby, M. J., Smirnov, N., Smirnov, D., Song, L., Sorensen, P., Spinka, H. M., Srivastava, B., Stanislaus, T. D. S., Stepanov, M., Strikhanov, M., Stringfellow, B., Sumbera, M., Summa, B., Sun, Y., Sun, Z., Sun, X. M., Sun, X., Surrow, B., Svirida, D. N., Szelezniak, M. A., Tang, A. H., Tang, Z., Tarnowsky, T., Tawfik, A., Thomas, J. H., Timmins, A. R., Tlusty, D., Todoroki, T., Tokarev, M., Trentalange, S., Tribble, R. E., Tribedy, P., Tripathy, S. K., Tsai, O. D., Ullrich, T., Underwood, D. G., Upsal, I., Van Buren, G., van Nieuwenhuizen, G., Vandenbroucke, M., Varma, R., Vasiliev, A. N., Vertesi, R., Videbæk, F., Viyogi, Y. P., Vokal, S., Voloshin, S. A., Vossen, A., Wang, J. S., Wang, F., Wang, H., Wang, G., Wang, Y., Webb, G., Webb, J. C., Wen, L., Westfall, G. D., Wieman, H., Wissink, S. W., Witt, R., Wu, Y. F., Wu, Null, Xiao, Z. G., Xie, W., Xin, K., Xu, H., Xu, Z., Xu, Q. H., Xu, Y. F., Xu, N., Yang, S., Yang, Y., Yang, Q., Yang, C., Ye, Z., Yepes, P., Yi, L., Yip, K., Yoo, I. -K., Yu, N., Zbroszczyk, H., Zha, W., Zhang, Y., Zhang, Z., Zhang, J. B., Zhang, J., Zhang, X. P., Zhang, S., Zhao, J., Zhong, C., Zhou, L., Zhu, X., Zoulkarneeva, Y., Laboratoire SUBATECH Nantes (SUBATECH), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and STAR

Subjects
Quark, Nuclear and High Energy Physics, Particle physics, High Energy Physics::Lattice, Nuclear Theory, Hadron, FOS: Physical sciences, Constituent quark, Context (language use), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear physics, Root-S(Nn)=2.76 Tev, Pion, Pb-Pb Collisions, Nuclear Experiment (nucl-ex), heavy ions, Nuclear Experiment, Nuclear and High Energy Physic, Transverse-Momentum, Physics, RHIC, STAR, High Energy Physics::Phenomenology, Spectra, Pp, Collaboration, lcsh:QC1-999, heavy ion, quark gluon plasma, Hadronization, Nucleus Collisions, Perspective, Quark–gluon plasma, Quark-Gluon Plasma, High Energy Physics::Experiment, Relativistic Heavy Ion Collider, lcsh:Physics
Abstract

The STAR Collaboration presents for the first time two-dimensional di-hadron correlations with identified leading hadrons in 200 GeV central Au+Au and minimum-bias d+Au collisions to explore hadronization mechanisms in the quark gluon plasma. The enhancement of the jet-like yield for leading pions in Au + Au data with respect to the d + Au reference and the absence of such an enhancement for leading non-pions (protons and kaons) are discussed within the context of a quark recombination scenario. The correlated yield at large angles, specifically in the ridge region, is found to be significantly higher for leading non-pions than pions. The consistencies of the constituent quark scaling, azimuthal harmonic model and a mini-jet modification model description of the data are tested, providing further constraints on hadronization. (C) 2015 The Authors. Published by Elsevier B.V.

Published
2015

88. The effect of pre-deformation on the precipitation behavior of AlCuMg(Si) alloys with low Cu/Mg ratios

Author

Z. Le, Jiangbo Lu, W.Q. Ming, S.Y. Duan, Fengjiao Niu, C.L. Wu, and J.H. Chen

Subjects
Materials science, Precipitation (chemistry), Mechanical Engineering, Alloy, Composite number, Metallurgy, technology, industry, and agriculture, Metals and Alloys, 02 engineering and technology, engineering.material, equipment and supplies, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Precipitation hardening, Mechanics of Materials, Phase (matter), Materials Chemistry, engineering, Imaging technique, 0210 nano-technology, Pre deformation, Chemical composition
Abstract

The addition of a trace amount of Si significantly affects the precipitation sequence of the Al–Cu–Mg alloy with a low Cu/Mg ratio, such as forming Si-modified Guinier-Preston-Bagaryatsky (GPB) zones to suppress the precipitation of the S phase. The introduction of pre-deformation also affects the precipitation behavior during the subsequent aging process. In this paper, the atomic-resolution high-angle-annular-dark-field (HAADF) imaging technique and first-principles calculation are used to study the effect of pre-deformation on the precipitation behavior of an Al-3.0Cu-1.8Mg-0.5Si alloy during aging at 180 °C. In order to learn the effect of minor Si-addition, a Si-free alloy with similar chemical composition is also studied. It is found that for Si-free alloy, the 6% pre-deformation promotes the precipitation of the S phase dispersedly during the subsequent aging, leading to an increase of the peak hardness. For Si-containing alloy, the 6% pre-deformation prior to aging suppresses the precipitation of Si-modified GPB zone acting as the original main strengthening precipitates and promotes the formation of successive composite precipitates including the S phase, various GPB zones, C phase and sub-units of C/Qʹ phase. The successive composite precipitates are easy to grow up and coarsen, which weakens the contribution of precipitation strengthening compared to the small Si-modified GPB zone. As such, the 6% pre-deformation prior to aging at 180 °C provides a positive strengthening effect for Si-free alloy, but a negative strengthening effect for the Si-containing alloy.

Published
2020

89. Transverse spin-dependent azimuthal correlations of charged pion pairs measured in + Collisions at

Author

L. Adamczyk, J.R. Adams, J.K. Adkins, G. Agakishiev, M.M. Aggarwal, Z. Ahammed, N.N. Ajitanand, I. Alekseev, D.M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E.C. Aschenauer, M.U. Ashraf, A. Attri, G.S. Averichev, V. Bairathi, K. Barish, A. Behera, R. Bellwied, A. Bhasin, A.K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L.C. Bland, I.G. Bordyuzhin, J. Bouchet, J.D. Brandenburg, A.V. Brandin, D. Brown, J. Bryslawskyj, I. Bunzarov, J. Butterworth, H. Caines, M. Calderón de la Barca Sánchez, J.M. Campbell, D. Cebra, I. Chakaberia, P. Chaloupka, Z. Chang, N. Chankova-Bunzarova, A. Chatterjee, S. Chattopadhyay, J.H. Chen, X. Chen, J. Cheng, M. Cherney, W. Christie, G. Contin, H.J. Crawford, T.G. Dedovich, J. Deng, I.M. Deppner, A.A. Derevschikov, L. Didenko, C. Dilks, X. Dong, J.L. Drachenberg, J.E. Draper, J.C. Dunlop, L.G. Efimov, N. Elsey, J. Engelage, G. Eppley, R. Esha, S. Esumi, O. Evdokimov, J. Ewigleben, O. Eyser, R. Fatemi, S. Fazio, P. Federic, P. Federicova, J. Fedorisin, Z. Feng, P. Filip, E. Finch, Y. Fisyak, C.E. Flores, J. Fujita, L. Fulek, C.A. Gagliardi, F. Geurts, A. Gibson, M. Girard, D. Grosnick, D.S. Gunarathne, Y. Guo, A. Gupta, W. Guryn, A.I. Hamad, A. Hamed, A. Harlenderova, J.W. Harris, L. He, S. Heppelmann, N. Herrmann, A. Hirsch, S. Horvat, X. Huang, H.Z. Huang, T. Huang, B. Huang, T.J. Humanic, P. Huo, G. Igo, W.W. Jacobs, A. Jentsch, J. Jia, K. Jiang, S. Jowzaee, E.G. Judd, S. Kabana, D. Kalinkin, K. Kang, D. Kapukchyan, K. Kauder, H.W. Ke, D. Keane, A. Kechechyan, Z. Khan, D.P. Kikoła, C. Kim, I. Kisel, A. Kisiel, L. Kochenda, M. Kocmanek, T. Kollegger, L.K. Kosarzewski, A.F. Kraishan, L. Krauth, P. Kravtsov, K. Krueger, N. Kulathunga, L. Kumar, J. Kvapil, J.H. Kwasizur, R. Lacey, J.M. Landgraf, K.D. Landry, J. Lauret, A. Lebedev, R. Lednicky, J.H. Lee, W. Li, C. Li, X. Li, Y. Li, J. Lidrych, T. Lin, M.A. Lisa, Y. Liu, H. Liu, F. Liu, P. Liu, T. Ljubicic, W.J. Llope, M. Lomnitz, R.S. Longacre, X. Luo, S. Luo, L. Ma, Y.G. Ma, G.L. Ma, R. Ma, N. Magdy, R. Majka, D. Mallick, S. Margetis, C. Markert, H.S. Matis, D. Mayes, K. Meehan, J.C. Mei, Z.W. Miller, N.G. Minaev, S. Mioduszewski, D. Mishra, S. Mizuno, B. Mohanty, M.M. Mondal, D.A. Morozov, M.K. Mustafa, Md. Nasim, T.K. Nayak, J.M. Nelson, D.B. Nemes, M. Nie, G. Nigmatkulov, T. Niida, L.V. Nogach, T. Nonaka, S.B. Nurushev, G. Odyniec, A. Ogawa, K. Oh, V.A. Okorokov, D. Olvitt, B.S. Page, R. Pak, Y. Pandit, Y. Panebratsev, B. Pawlik, H. Pei, C. Perkins, J. Pluta, K. Poniatowska, J. Porter, M. Posik, N.K. Pruthi, M. Przybycien, J. Putschke, A. Quintero, S. Ramachandran, R.L. Ray, R. Reed, M.J. Rehbein, H.G. Ritter, J.B. Roberts, O.V. Rogachevskiy, J.L. Romero, J.D. Roth, L. Ruan, J. Rusnak, O. Rusnakova, N.R. Sahoo, P.K. Sahu, S. Salur, J. Sandweiss, M. Saur, J. Schambach, A.M. Schmah, W.B. Schmidke, N. Schmitz, B.R. Schweid, J. Seger, M. Sergeeva, R. Seto, P. Seyboth, N. Shah, E. Shahaliev, P.V. Shanmuganathan, M. Shao, W.Q. Shen, S.S. Shi, Z. Shi, Q.Y. Shou, E.P. Sichtermann, R. Sikora, M. Simko, S. Singha, M.J. Skoby, N. Smirnov, D. Smirnov, W. Solyst, P. Sorensen, H.M. Spinka, B. Srivastava, T.D.S. Stanislaus, D.J. Stewart, M. Strikhanov, B. Stringfellow, A.A.P. Suaide, T. Sugiura, M. Sumbera, B. Summa, X. Sun, X.M. Sun, Y. Sun, B. Surrow, D.N. Svirida, Z. Tang, A.H. Tang, A. Taranenko, T. Tarnowsky, A. Tawfik, J. Thäder, J.H. Thomas, A.R. Timmins, D. Tlusty, T. Todoroki, M. Tokarev, S. Trentalange, R.E. Tribble, P. Tribedy, S.K. Tripathy, B.A. Trzeciak, O.D. Tsai, B. Tu, T. Ullrich, D.G. Underwood, I. Upsal, G. Van Buren, G. van Nieuwenhuizen, A.N. Vasiliev, F. Videbæk, S. Vokal, S.A. Voloshin, A. Vossen, G. Wang, Y. Wang, F. Wang, G. Webb, J.C. Webb, L. Wen, G.D. Westfall, H. Wieman, S.W. Wissink, R. Witt, Y. Wu, Z.G. Xiao, G. Xie, W. Xie, N. Xu, Y.F. Xu, Q.H. Xu, Z. Xu, Y. Yang, C. Yang, S. Yang, Q. Yang, Z. Ye, L. Yi, K. Yip, I.-K. Yoo, H. Zbroszczyk, W. Zha, J.B. Zhang, J. Zhang, S. Zhang, Z. Zhang, Y. Zhang, L. Zhang, X.P. Zhang, J. Zhao, C. Zhong, C. Zhou, L. Zhou, X. Zhu, Z. Zhu, and M. Zyzak

Subjects
Physics, Quark, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Nuclear Theory, Parton, Spin structure, Polarization (waves), Deep inelastic scattering, 01 natural sciences, Pion, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Nucleon, Nuclear Experiment
Abstract

The transversity distribution, which describes transversely polarized quarks in transversely polarized nucleons, is a fundamental component of the spin structure of the nucleon, and is only loosely constrained by global fits to existing semi-inclusive deep inelastic scattering (SIDIS) data. In transversely polarized p↑+p collisions it can be accessed using transverse polarization dependent fragmentation functions which give rise to azimuthal correlations between the polarization of the struck parton and the final state scalar mesons.This letter reports on spin dependent di-hadron correlations measured by the STAR experiment. The new dataset corresponds to 25 pb$^{−1}$ integrated luminosity of p↑+p collisions at s=500 GeV, an increase of more than a factor of ten compared to our previous measurement at s=200 GeV. Non-zero asymmetries sensitive to transversity are observed at a Q2 of several hundred GeV and are found to be consistent with the former measurement and a model calculation. We expect that these data will enable an extraction of transversity with comparable precision to current SIDIS datasets but at much higher momentum transfers where subleading effects are suppressed.

Published
2018

90. Transverse spin-dependent azimuthal correlations of charged pion pairs measured in p ↑ + p collisions at s=500 GeV

Author

L. Adamczyk, J.R. Adams, J.K. Adkins, G. Agakishiev, M.M. Aggarwal, Z. Ahammed, N.N. Ajitanand, I. Alekseev, D.M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E.C. Aschenauer, M.U. Ashraf, A. Attri, G.S. Averichev, V. Bairathi, K. Barish, A. Behera, R. Bellwied, A. Bhasin, A.K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L.C. Bland, I.G. Bordyuzhin, J. Bouchet, J.D. Brandenburg, A.V. Brandin, D. Brown, J. Bryslawskyj, I. Bunzarov, J. Butterworth, H. Caines, M. Calderón de la Barca Sánchez, J.M. Campbell, D. Cebra, I. Chakaberia, P. Chaloupka, Z. Chang, N. Chankova-Bunzarova, A. Chatterjee, S. Chattopadhyay, J.H. Chen, X. Chen, J. Cheng, M. Cherney, W. Christie, G. Contin, H.J. Crawford, T.G. Dedovich, J. Deng, I.M. Deppner, A.A. Derevschikov, L. Didenko, C. Dilks, X. Dong, J.L. Drachenberg, J.E. Draper, J.C. Dunlop, L.G. Efimov, N. Elsey, J. Engelage, G. Eppley, R. Esha, S. Esumi, O. Evdokimov, J. Ewigleben, O. Eyser, R. Fatemi, S. Fazio, P. Federic, P. Federicova, J. Fedorisin, Z. Feng, P. Filip, E. Finch, Y. Fisyak, C.E. Flores, J. Fujita, L. Fulek, C.A. Gagliardi, F. Geurts, A. Gibson, M. Girard, D. Grosnick, D.S. Gunarathne, Y. Guo, A. Gupta, W. Guryn, A.I. Hamad, A. Hamed, A. Harlenderova, J.W. Harris, L. He, S. Heppelmann, N. Herrmann, A. Hirsch, S. Horvat, X. Huang, H.Z. Huang, T. Huang, B. Huang, T.J. Humanic, P. Huo, G. Igo, W.W. Jacobs, A. Jentsch, J. Jia, K. Jiang, S. Jowzaee, E.G. Judd, S. Kabana, D. Kalinkin, K. Kang, D. Kapukchyan, K. Kauder, H.W. Ke, D. Keane, A. Kechechyan, Z. Khan, D.P. Kikoła, C. Kim, I. Kisel, A. Kisiel, L. Kochenda, M. Kocmanek, T. Kollegger, L.K. Kosarzewski, A.F. Kraishan, L. Krauth, P. Kravtsov, K. Krueger, N. Kulathunga, L. Kumar, J. Kvapil, J.H. Kwasizur, R. Lacey, J.M. Landgraf, K.D. Landry, J. Lauret, A. Lebedev, R. Lednicky, J.H. Lee, W. Li, C. Li, X. Li, Y. Li, J. Lidrych, T. Lin, M.A. Lisa, Y. Liu, H. Liu, F. Liu, P. Liu, T. Ljubicic, W.J. Llope, M. Lomnitz, R.S. Longacre, X. Luo, S. Luo, L. Ma, Y.G. Ma, G.L. Ma, R. Ma, N. Magdy, R. Majka, D. Mallick, S. Margetis, C. Markert, H.S. Matis, D. Mayes, K. Meehan, J.C. Mei, Z.W. Miller, N.G. Minaev, S. Mioduszewski, D. Mishra, S. Mizuno, B. Mohanty, M.M. Mondal, D.A. Morozov, M.K. Mustafa, Md. Nasim, T.K. Nayak, J.M. Nelson, D.B. Nemes, M. Nie, G. Nigmatkulov, T. Niida, L.V. Nogach, T. Nonaka, S.B. Nurushev, G. Odyniec, A. Ogawa, K. Oh, V.A. Okorokov, D. Olvitt, Jr., B.S. Page, R. Pak, Y. Pandit, Y. Panebratsev, B. Pawlik, H. Pei, C. Perkins, J. Pluta, K. Poniatowska, J. Porter, M. Posik, N.K. Pruthi, M. Przybycien, J. Putschke, A. Quintero, S. Ramachandran, R.L. Ray, R. Reed, M.J. Rehbein, H.G. Ritter, J.B. Roberts, O.V. Rogachevskiy, J.L. Romero, J.D. Roth, L. Ruan, J. Rusnak, O. Rusnakova, N.R. Sahoo, P.K. Sahu, S. Salur, J. Sandweiss, M. Saur, J. Schambach, A.M. Schmah, W.B. Schmidke, N. Schmitz, B.R. Schweid, J. Seger, M. Sergeeva, R. Seto, P. Seyboth, N. Shah, E. Shahaliev, P.V. Shanmuganathan, M. Shao, W.Q. Shen, S.S. Shi, Z. Shi, Q.Y. Shou, E.P. Sichtermann, R. Sikora, M. Simko, S. Singha, M.J. Skoby, N. Smirnov, D. Smirnov, W. Solyst, P. Sorensen, H.M. Spinka, B. Srivastava, T.D.S. Stanislaus, D.J. Stewart, M. Strikhanov, B. Stringfellow, A.A.P. Suaide, T. Sugiura, M. Sumbera, B. Summa, X. Sun, X.M. Sun, Y. Sun, B. Surrow, D.N. Svirida, Z. Tang, A.H. Tang, A. Taranenko, T. Tarnowsky, A. Tawfik, J. Thäder, J.H. Thomas, A.R. Timmins, D. Tlusty, T. Todoroki, M. Tokarev, S. Trentalange, R.E. Tribble, P. Tribedy, S.K. Tripathy, B.A. Trzeciak, O.D. Tsai, B. Tu, T. Ullrich, D.G. Underwood, I. Upsal, G. Van Buren, G. van Nieuwenhuizen, A.N. Vasiliev, F. Videbæk, S. Vokal, S.A. Voloshin, A. Vossen, G. Wang, Y. Wang, F. Wang, G. Webb, J.C. Webb, L. Wen, G.D. Westfall, H. Wieman, S.W. Wissink, R. Witt, Y. Wu, Z.G. Xiao, G. Xie, W. Xie, N. Xu, Y.F. Xu, Q.H. Xu, Z. Xu, Y. Yang, C. Yang, S. Yang, Q. Yang, Z. Ye, L. Yi, K. Yip, I.-K. Yoo, H. Zbroszczyk, W. Zha, J.B. Zhang, J. Zhang, S. Zhang, Z. Zhang, Y. Zhang, L. Zhang, X.P. Zhang, J. Zhao, C. Zhong, C. Zhou, L. Zhou, X. Zhu, Z. Zhu, M. Zyzak, Adamczyk, L., Adams, J. R., Adkins, J. K., Agakishiev, G., Aggarwal, M. M., Ahammed, Z., Ajitanand, N. N., Alekseev, I., Anderson, D. M., Aoyama, R., Aparin, A., Arkhipkin, D., Aschenauer, E. C., Ashraf, M. U., Attri, A., Averichev, G. S., Bairathi, V., Barish, K., Behera, A., Bellwied, R., Bhasin, A., Bhati, A. K., Bhattarai, P., Bielcik, J., Bielcikova, J., Bland, L. C., Bordyuzhin, I. G., Bouchet, J., Brandenburg, J. D., Brandin, A. V., Brown, D., Bryslawskyj, J., Bunzarov, I., Butterworth, J., Caines, H., Calderón de la Barca Sánchez, M., Campbell, J. M., Cebra, D., Chakaberia, I., Chaloupka, P., Chang, Z., Chankova-Bunzarova, N., Chatterjee, A., Chattopadhyay, S., Chen, J. H., Chen, X., Cheng, J., Cherney, M., Christie, W., Contin, G., Crawford, H. J., Dedovich, T. G., Deng, J., Deppner, I. M., Derevschikov, A. A., Didenko, L., Dilks, C., Dong, X., Drachenberg, J. L., Draper, J. E., Dunlop, J. C., Efimov, L. G., Elsey, N., Engelage, J., Eppley, G., Esha, R., Esumi, S., Evdokimov, O., Ewigleben, J., Eyser, O., Fatemi, R., Fazio, S., Federic, P., Federicova, P., Fedorisin, J., Feng, Z., Filip, P., Finch, E., Fisyak, Y., Flores, C. E., Fujita, J., Fulek, L., Gagliardi, C. A., Geurts, F., Gibson, A., Girard, M., Grosnick, D., Gunarathne, D. S., Guo, Y., Gupta, A., Guryn, W., Hamad, A. I., Hamed, A., Harlenderova, A., Harris, J. W., He, L., Heppelmann, S., Herrmann, N., Hirsch, A., Horvat, S., Huang, X., Huang, H. Z., Huang, T., Huang, B., Humanic, T. J., Huo, P., Igo, G., Jacobs, W. W., Jentsch, A., Jia, J., Jiang, K., Jowzaee, S., Judd, E. G., Kabana, S., Kalinkin, D., Kang, K., Kapukchyan, D., Kauder, K., Ke, H. W., Keane, D., Kechechyan, A., Khan, Z., Kikoła, D. P., Kim, C., Kisel, I., Kisiel, A., Kochenda, L., Kocmanek, M., Kollegger, T., Kosarzewski, L. K., Kraishan, A. F., Krauth, L., Kravtsov, P., Krueger, K., Kulathunga, N., Kumar, L., Kvapil, J., Kwasizur, J. H., Lacey, R., Landgraf, J. M., Landry, K. D., Lauret, J., Lebedev, A., Lednicky, R., Lee, J. H., Li, W., Li, C., Li, X., Li, Y., Lidrych, J., Lin, T., Lisa, M. A., Liu, Y., Liu, H., Liu, F., Liu, P., Ljubicic, T., Llope, W. J., Lomnitz, M., Longacre, R. S., Luo, X., Luo, S., Ma, L., Ma, Y. G., Ma, G. L., Ma, R., Magdy, N., Majka, R., Mallick, D., Margetis, S., Markert, C., Matis, H. S., Mayes, D., Meehan, K., Mei, J. C., Miller, Z. W., Minaev, N. G., Mioduszewski, S., Mishra, D., Mizuno, S., Mohanty, B., Mondal, M. M., Morozov, D. A., Mustafa, M. K., Nasim, Md., Nayak, T. K., Nelson, J. M., Nemes, D. B., Nie, M., Nigmatkulov, G., Niida, T., Nogach, L. V., Nonaka, T., Nurushev, S. B., Odyniec, G., Ogawa, A., Oh, K., Okorokov, V. A., Olvitt, D., Page, B. S., Pak, R., Pandit, Y., Panebratsev, Y., Pawlik, B., Pei, H., Perkins, C., Pluta, J., Poniatowska, K., Porter, J., Posik, M., Pruthi, N. K., Przybycien, M., Putschke, J., Quintero, A., Ramachandran, S., Ray, R. L., Reed, R., Rehbein, M. J., Ritter, H. G., Roberts, J. B., Rogachevskiy, O. V., Romero, J. L., Roth, J. D., Ruan, L., Rusnak, J., Rusnakova, O., Sahoo, N. R., Sahu, P. K., Salur, S., Sandweiss, J., Saur, M., Schambach, J., Schmah, A. M., Schmidke, W. B., Schmitz, N., Schweid, B. R., Seger, J., Sergeeva, M., Seto, R., Seyboth, P., Shah, N., Shahaliev, E., Shanmuganathan, P. V., Shao, M., Shen, W. Q., Shi, S. S., Shi, Z., Shou, Q. Y., Sichtermann, E. P., Sikora, R., Simko, M., Singha, S., Skoby, M. J., Smirnov, N., Smirnov, D., Solyst, W., Sorensen, P., Spinka, H. M., Srivastava, B., Stanislaus, T. D. S., Stewart, D. J., Strikhanov, M., Stringfellow, B., Suaide, A. A. P., Sugiura, T., Sumbera, M., Summa, B., Sun, X., Sun, X. M., Sun, Y., Surrow, B., Svirida, D. N., Tang, Z., Tang, A. H., Taranenko, A., Tarnowsky, T., Tawfik, A., Thäder, J., Thomas, J. H., Timmins, A. R., Tlusty, D., Todoroki, T., Tokarev, M., Trentalange, S., Tribble, R. E., Tribedy, P., Tripathy, S. K., Trzeciak, B. A., Tsai, O. D., Tu, B., Ullrich, T., Underwood, D. G., Upsal, I., Van Buren, G., van Nieuwenhuizen, G., Vasiliev, A. N., Videbæk, F., Vokal, S., Voloshin, S. A., Vossen, A., Wang, G., Wang, Y., Wang, F., Webb, G., Webb, J. C., Wen, L., Westfall, G. D., Wieman, H., Wissink, S. W., Witt, R., Wu, Y., Xiao, Z. G., Xie, G., Xie, W., Xu, N., Xu, Y. F., Xu, Q. H., Xu, Z., Yang, Y., Yang, C., Yang, S., Yang, Q., Ye, Z., Yi, L., Yip, K., Yoo, I. -K., Zbroszczyk, H., Zha, W., Zhang, J. B., Zhang, J., Zhang, S., Zhang, Z., Zhang, Y., Zhang, L., Zhang, X. P., Zhao, J., Zhong, C., Zhou, C., Zhou, L., Zhu, X., Zhu, Z., and Zyzak, M.

Subjects
Nuclear and High Energy Physics, Transversity, Interference fragmentation function, Di-hadron correlations, High Energy Physics::Experiment, Di-hadron correlation, Nuclear Experiment, lcsh:Physics, lcsh:QC1-999
Abstract

The transversity distribution, which describes transversely polarized quarks in transversely polarized nucleons, is a fundamental component of the spin structure of the nucleon, and is only loosely constrained by global fits to existing semi-inclusive deep inelastic scattering (SIDIS) data. In transversely polarized p↑+p collisions it can be accessed using transverse polarization dependent fragmentation functions which give rise to azimuthal correlations between the polarization of the struck parton and the final state scalar mesons.This letter reports on spin dependent di-hadron correlations measured by the STAR experiment. The new dataset corresponds to 25 pb−1 integrated luminosity of p↑+p collisions at s=500 GeV, an increase of more than a factor of ten compared to our previous measurement at s=200 GeV. Non-zero asymmetries sensitive to transversity are observed at a Q2 of several hundred GeV and are found to be consistent with the former measurement and a model calculation. We expect that these data will enable an extraction of transversity with comparable precision to current SIDIS datasets but at much higher momentum transfers where subleading effects are suppressed. Keywords: Transversity, Di-hadron correlations, Interference fragmentation function

Published
2018

91. On the compressive failure of tungsten fiber reinforced Zr-based bulk metallic glass composite

Author

Lanhong Dai, J.H. Chen, X. W. Chen, Minqiang Jiang, Yan Chen, and H.F. Zhang

Subjects
Fiber pull-out, Materials science, Applied Mathematics, Mechanical Engineering, Composite number, chemistry.chemical_element, Fiber-reinforced composite, Strain rate, Tungsten, Condensed Matter Physics, Shear (sheet metal), chemistry, Mechanics of Materials, Modeling and Simulation, Volume fraction, General Materials Science, Fiber, Composite material
Abstract

In this paper, a combination of experimentation and analysis is used to identify and study the mechanisms that govern the failure of tungsten fiber reinforced Zr41.2Ti13.8Cu10Ni12.5Be22.5 bulk metallic glass composite. In the experimental part, quasi-static and dynamic compressive behaviors of this composite with various fiber volume fractions were systematically investigated. For this composite under uniaxial compression, both the microstructure and strain rate are found to affect the compressive failure behavior. With the increasing fiber volume fraction, or with the decreasing strain rate, the failure mode of the composite switches from shear to splitting. Motivated by the experimental findings, an energy competition mechanism is proposed to unveil these fundamental behaviors of the tungsten fiber reinforced bulk metallic glass composite. The critical energy dissipations for shear banding and splitting of the composite are derived as the functions of tungsten fiber volume fraction and strain rate. It is found that the failure behavior of the composite is decided by the energy competition between shear banding and splitting. (C) 2015 Elsevier Ltd. All rights reserved.

Published
2015

92. Ultrathin ZrBxOy films as diffusion barriers in Cu interconnects

Author

Y. Meng, Z.X. Song, J.H. Chen, F. Ma, Y.H. Li, J.F. Wang, C.C. Wang, and K.W. Xu

Subjects
Materials science, Diffusion barrier, Diffusion, Analytical chemistry, Nanotechnology, Sputter deposition, Condensed Matter Physics, Block (periodic table), Surfaces, Coatings and Films, Amorphous solid, Atomic diffusion, Thermal stability, Thin film, Instrumentation
Abstract

Ultra-thin ZrB x O y films 5 nm in thickness were prepared by radio-frequency (rf) magnetron sputtering. The thermal stability and the barrier performance against the inter-diffusion between Cu and Si were studied via thermal annealing at different temperatures. The as-deposited amorphous ZrB x O y thin films could effectively block the inter-diffusion of Cu and Si atoms. However, the thin films became invalid at temperatures higher than 600 °C and significant atomic diffusion occurred, resulting in high-resistivity Cu 3 Si compound. Hence, ZrB x O y thin films can be exploited as diffusion barriers in Cu interconnects at temperatures lower than 600 °C.

Published
2015

93. Long-range pseudorapidity dihadron correlations in d+ Au collisions at sNN=200 GeV

Author

L. Adamczyk, J.K. Adkins, G. Agakishiev, M.M. Aggarwal, Z. Ahammed, I. Alekseev, J. Alford, A. Aparin, D. Arkhipkin, E.C. Aschenauer, G.S. Averichev, A. Banerjee, R. Bellwied, A. Bhasin, A.K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L.C. Bland, I.G. Bordyuzhin, J. Bouchet, A.V. Brandin, I. Bunzarov, T.P. Burton, J. Butterworth, H. Caines, M. Calder'on de la Barca S'anchez, J.M. Campbell, D. Cebra, M.C. Cervantes, I. Chakaberia, P. Chaloupka, Z. Chang, S. Chattopadhyay, J.H. Chen, X. Chen, J. Cheng, M. Cherney, W. Christie, M.J.M. Codrington, G. Contin, H.J. Crawford, S. Das, L.C. De Silva, R.R. Debbe, T.G. Dedovich, J. Deng, A.A. Derevschikov, B. di Ruzza, L. Didenko, C. Dilks, X. Dong, J.L. Drachenberg, J.E. Draper, C.M. Du, L.E. Dunkelberger, J.C. Dunlop, L.G. Efimov, J. Engelage, G. Eppley, R. Esha, O. Evdokimov, O. Eyser, R. Fatemi, S. Fazio, P. Federic, J. Fedorisin, null Feng, P. Filip, Y. Fisyak, C.E. Flores, L. Fulek, C.A. Gagliardi, D. Garand, F. Geurts, A. Gibson, M. Girard, L. Greiner, D. Grosnick, D.S. Gunarathne, Y. Guo, S. Gupta, A. Gupta, W. Guryn, A. Hamad, A. Hamed, R. Haque, J.W. Harris, L. He, S. Heppelmann, A. Hirsch, G.W. Hoffmann, D.J. Hofman, S. Horvat, H.Z. Huang, X. Huang, B. Huang, P. Huck, T.J. Humanic, G. Igo, W.W. Jacobs, H. Jang, K. Jiang, E.G. Judd, S. Kabana, D. Kalinkin, K. Kang, K. Kauder, H.W. Ke, D. Keane, A. Kechechyan, Z.H. Khan, D.P. Kikola, I. Kisel, A. Kisiel, D.D. Koetke, T. Kollegger, L.K. Kosarzewski, L. Kotchenda, A.F. Kraishan, P. Kravtsov, K. Krueger, I. Kulakov, L. Kumar, R.A. Kycia, M.A.C. Lamont, J.M. Landgraf, K.D. Landry, J. Lauret, A. Lebedev, R. Lednicky, J.H. Lee, X. Li, W. Li, Z.M. Li, Y. Li, C. Li, M.A. Lisa, F. Liu, T. Ljubicic, W.J. Llope, M. Lomnitz, R.S. Longacre, X. Luo, L. Ma, R. Ma, G.L. Ma, Y.G. Ma, N. Magdy, R. Majka, A. Manion, S. Margetis, C. Markert, H. Masui, H.S. Matis, D. McDonald, K. Meehan, N.G. Minaev, S. Mioduszewski, B. Mohanty, M.M. Mondal, D.A. Morozov, M.K. Mustafa, B.K. Nandi, Md. Nasim, T.K. Nayak, G. Nigmatkulov, L.V. Nogach, S.Y. Noh, J. Novak, S.B. Nurushev, G. Odyniec, A. Ogawa, K. Oh, V. Okorokov, D.L. Olvitt, B.S. Page, Y.X. Pan, Y. Pandit, Y. Panebratsev, T. Pawlak, B. Pawlik, H. Pei, C. Perkins, A. Peterson, P. Pile, M. Planinic, J. Pluta, N. Poljak, K. Poniatowska, J. Porter, M. Posik, A.M. Poskanzer, N.K. Pruthi, J. Putschke, H. Qiu, A. Quintero, S. Ramachandran, R. Raniwala, S. Raniwala, R.L. Ray, H.G. Ritter, J.B. Roberts, O.V. Rogachevskiy, J.L. Romero, A. Roy, L. Ruan, J. Rusnak, O. Rusnakova, N.R. Sahoo, P.K. Sahu, I. Sakrejda, S. Salur, A. Sandacz, J. Sandweiss, A. Sarkar, J. Schambach, R.P. Scharenberg, A.M. Schmah, W.B. Schmidke, N. Schmitz, J. Seger, P. Seyboth, N. Shah, E. Shahaliev, P.V. Shanmuganathan, M. Shao, M.K. Sharma, B. Sharma, W.Q. Shen, S.S. Shi, Q.Y. Shou, E.P. Sichtermann, R. Sikora, M. Simko, M.J. Skoby, N. Smirnov, D. Smirnov, D. Solanki, L. Song, P. Sorensen, H.M. Spinka, B. Srivastava, T.D.S. Stanislaus, R. Stock, M. Strikhanov, B. Stringfellow, M. Sumbera, B.J. Summa, Y. Sun, Z. Sun, X.M. Sun, X. Sun, B. Surrow, D.N. Svirida, M.A. Szelezniak, J. Takahashi, A.H. Tang, Z. Tang, T. Tarnowsky, A.N. Tawfik, J.H. Thomas, A.R. Timmins, D. Tlusty, M. Tokarev, S. Trentalange, R.E. Tribble, P. Tribedy, S.K. Tripathy, B.A. Trzeciak, O.D. Tsai, T. Ullrich, D.G. Underwood, I. Upsal, G. Van Buren, G. van Nieuwenhuizen, M. Vandenbroucke, R. Varma, A.N. Vasiliev, R. Vertesi, F. Videbaek, Y.P. Viyogi, S. Vokal, S.A. Voloshin, A. Vossen, Y. Wang, F. Wang, H. Wang, J.S. Wang, G. Wang, J.C. Webb, G. Webb, L. Wen, G.D. Westfall, H. Wieman, S.W. Wissink, R. Witt, Y.F. Wu, Z. Xiao, W. Xie, K. Xin, Z. Xu, Q.H. Xu, N. Xu, H. Xu, Y.F. Xu, Y. Yang, C. Yang, S. Yang, Q. Yang, Z. Ye, P. Yepes, L. Yi, K. Yip, I.-K. Yoo, N. Yu, H. Zbroszczyk, W. Zha, J.B. Zhang, X.P. Zhang, S. Zhang, J. Zhang, Z. Zhang, Y. Zhang, J.L. Zhang, F. Zhao, J. Zhao, C. Zhong, L. Zhou, X. Zhu, Y. Zoulkarneeva, and M. Zyzak

Subjects
Delta, Physics, Nuclear and High Energy Physics, Particle physics, Time projection chamber, Hadron, Nuclear physics, Phi coefficient, Pseudorapidity, Quark–gluon plasma, High Energy Physics::Experiment, Multiplicity (chemistry), Nuclear Experiment, Relativistic Heavy Ion Collider
Abstract

Dihadron angular correlations in d + Au collisions at root S-NN = 200 GeV are reported as a function of the measured zero-degree calorimeter neutral energy and the forward charged hadron multiplicity in the Au-beam direction. A finite correlated yield is observed at large relative pseudorapidity (Delta eta) on the near side (i.e. relative azimuth Delta phi similar to 0). This correlated yield as a function of Delta eta appears to scale with the dominant, primarily jet-related, away-side (Delta phi similar to pi) yield. The Fourier coefficients of the Delta phi correlation, V-n = , have a strong Delta eta dependence. In addition, it is found that V-1 is approximately inversely proportional to the mid-rapidity event multiplicity, while V-2 is independent of it with similar magnitude in the forward (d-going) and backward (Au-going) directions. (C) 2015 The Authors. Published by Elsevier B.V.

Published
2015

94. Dynamic shear punch behavior of tungsten fiber reinforced Zr-based bulk metallic glass matrix composites

Author

J.H. Chen, H.F. Zhang, Lanhong Dai, Huazhu Fu, Xin Chen, Yan Chen, and Minqiang Jiang

Subjects
Materials science, Amorphous metal, Mechanical Engineering, Composite number, Aerospace Engineering, chemistry.chemical_element, Ocean Engineering, Tungsten, Shear (sheet metal), chemistry, Mechanics of Materials, Automotive Engineering, Volume fraction, Fracture (geology), Fiber, Composite material, Safety, Risk, Reliability and Quality, Failure mode and effects analysis, Civil and Structural Engineering
Abstract

Dynamic shear punch tests were carried out on the tungsten fiber reinforced Zr-based bulk metallic glass composites. The experimental results show that with the increasing fiber volume fraction, the failure mode of the composites switches from shear to tensile fracture. A new failure criterion, based on the Tsai-Hill criterion and the unified failure criterion for bulk metallic glasses, is proposed to characterize fracture behavior of this bulk metallic glass composite. It is found that the shear-to-normal strength ratio a controls the transition of failure mode of this metallic glass composite. The underlying mechanism of the transition of failure mode is discussed as well. (C) 2014 Elsevier Ltd. All rights reserved.

Published
2015

95. Corrigendum to 'Suppression of ϒ production in d+ Au and Au + Au collisions at sNN=200 GeV' [Phys. Lett. B 735 (2014) 127–137]

Author

L. Adamczyk, J.K. Adkins, G. Agakishiev, M.M. Aggarwal, Z. Ahammed, I. Alekseev, J. Alford, C.D. Anson, A. Aparin, D. Arkhipkin, E.C. Aschenauer, G.S. Averichev, J. Balewski, A. Banerjee, Z. Barnovska, D.R. Beavis, R. Bellwied, A. Bhasin, A.K. Bhati, P. Bhattarai, H. Bichsel, J. Bielcik, J. Bielcikova, L.C. Bland, I.G. Bordyuzhin, W. Borowski, J. Bouchet, A.V. Brandin, S.G. Brovko, S. Bültmann, I. Bunzarov, T.P. Burton, J. Butterworth, H. Caines, M. Calderón de la Barca Sánchez, D. Cebra, R. Cendejas, M.C. Cervantes, P. Chaloupka, Z. Chang, S. Chattopadhyay, H.F. Chen, J.H. Chen, L. Chen, J. Cheng, M. Cherney, A. Chikanian, W. Christie, J. Chwastowski, M.J.M. Codrington, R. Corliss, J.G. Cramer, H.J. Crawford, X. Cui, S. Das, A. Davila Leyva, L.C. De Silva, R.R. Debbe, T.G. Dedovich, J. Deng, A.A. Derevschikov, R. Derradi de Souza, S. Dhamija, B. di Ruzza, L. Didenko, C. Dilks, F. Ding, P. Djawotho, X. Dong, J.L. Drachenberg, J.E. Draper, C.M. Du, L.E. Dunkelberger, J.C. Dunlop, L.G. Efimov, J. Engelage, K.S. Engle, G. Eppley, L. Eun, O. Evdokimov, R. Fatemi, S. Fazio, J. Fedorisin, P. Filip, E. Finch, Y. Fisyak, C.E. Flores, C.A. Gagliardi, D.R. Gangadharan, D. Garand, F. Geurts, A. Gibson, M. Girard, S. Gliske, D. Grosnick, Y. Guo, A. Gupta, S. Gupta, W. Guryn, B. Haag, O. Hajkova, A. Hamed, L.-X. Han, R. Haque, J.W. Harris, J.P. Hays-Wehle, S. Heppelmann, K. Hill, A. Hirsch, G.W. Hoffmann, D.J. Hofman, S. Horvat, B. Huang, H.Z. Huang, P. Huck, T.J. Humanic, G. Igo, W.W. Jacobs, H. Jang, E.G. Judd, S. Kabana, D. Kalinkin, K. Kang, K. Kauder, H.W. Ke, D. Keane, A. Kechechyan, A. Kesich, Z.H. Khan, D.P. Kikola, I. Kisel, A. Kisiel, D.D. Koetke, T. Kollegger, J. Konzer, I. Koralt, W. Korsch, L. Kotchenda, P. Kravtsov, K. Krueger, I. Kulakov, L. Kumar, R.A. Kycia, M.A.C. Lamont, J.M. Landgraf, K.D. Landry, J. Lauret, A. Lebedev, R. Lednicky, J.H. Lee, W. Leight, M.J. LeVine, C. Li, W. Li, X. Li, Y. Li, Z.M. Li, L.M. Lima, M.A. Lisa, F. Liu, T. Ljubicic, W.J. Llope, R.S. Longacre, X. Luo, G.L. Ma, Y.G. Ma, D.M.M.D. Madagodagettige Don, D.P. Mahapatra, R. Majka, S. Margetis, C. Markert, H. Masui, H.S. Matis, D. McDonald, T.S. McShane, N.G. Minaev, S. Mioduszewski, B. Mohanty, M.M. Mondal, D.A. Morozov, M.G. Munhoz, M.K. Mustafa, B.K. Nandi, Md. Nasim, T.K. Nayak, J.M. Nelson, L.V. Nogach, S.Y. Noh, J. Novak, S.B. Nurushev, G. Odyniec, A. Ogawa, K. Oh, A. Ohlson, V. Okorokov, E.W. Oldag, R.A.N. Oliveira, M. Pachr, B.S. Page, S.K. Pal, Y.X. Pan, Y. Pandit, Y. Panebratsev, T. Pawlak, B. Pawlik, H. Pei, C. Perkins, W. Peryt, A. Peterson, P. Pile, M. Planinic, J. Pluta, D. Plyku, N. Poljak, J. Porter, A.M. Poskanzer, N.K. Pruthi, M. Przybycien, P.R. Pujahari, H. Qiu, A. Quintero, S. Ramachandran, R. Raniwala, S. Raniwala, R.L. Ray, C.K. Riley, H.G. Ritter, J.B. Roberts, O.V. Rogachevskiy, J.L. Romero, J.F. Ross, A. Roy, L. Ruan, J. Rusnak, N.R. Sahoo, P.K. Sahu, I. Sakrejda, S. Salur, A. Sandacz, J. Sandweiss, E. Sangaline, A. Sarkar, J. Schambach, R.P. Scharenberg, A.M. Schmah, W.B. Schmidke, N. Schmitz, J. Seger, P. Seyboth, N. Shah, E. Shahaliev, P.V. Shanmuganathan, M. Shao, B. Sharma, W.Q. Shen, S.S. Shi, Q.Y. Shou, E.P. Sichtermann, R.N. Singaraju, M.J. Skoby, D. Smirnov, N. Smirnov, D. Solanki, P. Sorensen, U.G. deSouza, H.M. Spinka, B. Srivastava, T.D.S. Stanislaus, J.R. Stevens, R. Stock, M. Strikhanov, B. Stringfellow, A.A.P. Suaide, M. Sumbera, X. Sun, X.M. Sun, Y. Sun, Z. Sun, B. Surrow, D.N. Svirida, T.J.M. Symons, A. Szanto de Toledo, J. Takahashi, A.H. Tang, Z. Tang, T. Tarnowsky, J.H. Thomas, A.R. Timmins, D. Tlusty, M. Tokarev, S. Trentalange, R.E. Tribble, P. Tribedy, B.A. Trzeciak, O.D. Tsai, J. Turnau, T. Ullrich, D.G. Underwood, G. Van Buren, G. van Nieuwenhuizen, J.A. Vanfossen, R. Varma, G.M.S. Vasconcelos, A.N. Vasiliev, R. Vertesi, F. Videbæk, Y.P. Viyogi, S. Vokal, A. Vossen, M. Wada, M. Walker, F. Wang, G. Wang, H. Wang, J.S. Wang, X.L. Wang, Y. Wang, G. Webb, J.C. Webb, G.D. Westfall, H. Wieman, G. Wimsatt, S.W. Wissink, R. Witt, Y.F. Wu, Z. Xiao, W. Xie, K. Xin, H. Xu, N. Xu, Q.H. Xu, Y. Xu, Z. Xu, W. Yan, C. Yang, Y. Yang, Z. Ye, P. Yepes, L. Yi, K. Yip, I.-K. Yoo, Y. Zawisza, H. Zbroszczyk, W. Zha, J.B. Zhang, J.L. Zhang, S. Zhang, X.P. Zhang, Y. Zhang, Z.P. Zhang, F. Zhao, J. Zhao, C. Zhong, X. Zhu, Y.H. Zhu, Y. Zoulkarneeva, and M. Zyzak

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Meson, Parton, Plasma, Nuclear matter, Nuclear physics, Yield (chemistry), High Energy Physics::Experiment, Rapidity, Atomic physics, Nuclear Experiment, STAR detector
Abstract

We report measurements of Υ meson production in p + p, d + Au, and Au+Au collisions using the STAR detector at RHIC. We compare the Υ yield to the measured cross section in p + p collisions in order to quantify any modifications of the yield in cold nuclear matter using d + Au data and in hot nuclear matter using Au+Au data separated into three centrality classes. Our p + p measurement is based on three times the statistics of our previous result. We obtain a nuclear modification factor for Upsilon (1S + 2S + 3S) in the rapidity range |y| < 1 in d + Au collisions of RdAu = 0.79 ± 0.24(stat.) ± 0.03(syst.) ± 0.10(p + p syst.). A comparison with models including shadowing and initial state parton energy loss indicates the presence of additional cold-nuclear matter suppression. Similarly, in the top 10% most-central Au + Au collisions, we measure a nuclear modification factor of R AA = 0.49 ±0.1(stat.) ±0.02(syst.) ±0.06(p + p syst.), which is a larger suppression factor than that seen in cold nuclear matter. Our results are consistent with complete suppression of excited-state Upsilon mesons in Au + Au collisions. Themore » additional suppression in Au + Au is consistent with the level expected in model calculations that include the presence of a hot, deconfined Quark–Gluon Plasma. However, understanding the suppression seen in d + Au is still needed before any definitive statements about the nature of the suppression in Au + Au can be made.« less

Published
2015

96. Effect of event selection on jetlike correlation measurement in d+ Au collisions at sNN=200 GeV

Author

L. Adamczyk, J.K. Adkins, G. Agakishiev, M.M. Aggarwal, Z. Ahammed, I. Alekseev, J. Alford, A. Aparin, D. Arkhipkin, E.C. Aschenauer, G.S. Averichev, A. Banerjee, R. Bellwied, A. Bhasin, A.K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L.C. Bland, I.G. Bordyuzhin, J. Bouchet, A.V. Brandin, I. Bunzarov, T.P. Burton, J. Butterworth, H. Caines, M. Calder'on de la Barca S'anchez, J.M. Campbell, D. Cebra, M.C. Cervantes, I. Chakaberia, P. Chaloupka, Z. Chang, S. Chattopadhyay, J.H. Chen, J. Cheng, M. Cherney, W. Christie, M.J.M. Codrington, G. Contin, H.J. Crawford, S. Das, L.C. De Silva, R.R. Debbe, T.G. Dedovich, J. Deng, A.A. Derevschikov, R. Derradi de Souza, B. di Ruzza, L. Didenko, C. Dilks, X. Dong, J.L. Drachenberg, J.E. Draper, C.M. Du, L.E. Dunkelberger, J.C. Dunlop, L.G. Efimov, J. Engelage, G. Eppley, R. Esha, O. Evdokimov, O. Eyser, R. Fatemi, S. Fazio, P. Federic, J. Fedorisin, null Feng, P. Filip, Y. Fisyak, C.E. Flores, C.A. Gagliardi, D. Garand, F. Geurts, A. Gibson, M. Girard, L. Greiner, D. Grosnick, D.S. Gunarathne, Y. Guo, S. Gupta, A. Gupta, W. Guryn, A. Hamad, A. Hamed, R. Haque, J.W. Harris, L. He, S. Heppelmann, A. Hirsch, G.W. Hoffmann, D.J. Hofman, S. Horvat, H.Z. Huang, X. Huang, B. Huang, P. Huck, T.J. Humanic, G. Igo, W.W. Jacobs, H. Jang, E.G. Judd, S. Kabana, D. Kalinkin, K. Kang, K. Kauder, H.W. Ke, D. Keane, A. Kechechyan, Z.H. Khan, D.P. Kikola, I. Kisel, A. Kisiel, S.R. Klein, D.D. Koetke, T. Kollegger, L.K. Kosarzewski, L. Kotchenda, A.F. Kraishan, P. Kravtsov, K. Krueger, I. Kulakov, L. Kumar, R.A. Kycia, M.A.C. Lamont, J.M. Landgraf, K.D. Landry, J. Lauret, A. Lebedev, R. Lednicky, J.H. Lee, X. Li, C. Li, W. Li, Z.M. Li, Y. Li, M.A. Lisa, F. Liu, T. Ljubicic, W.J. Llope, M. Lomnitz, R.S. Longacre, X. Luo, L. Ma, G.L. Ma, Y.G. Ma, R. Ma, N. Magdy, R. Majka, A. Manion, S. Margetis, C. Markert, H. Masui, H.S. Matis, D. McDonald, N.G. Minaev, S. Mioduszewski, B. Mohanty, M.M. Mondal, D.A. Morozov, M.K. Mustafa, B.K. Nandi, Md. Nasim, T.K. Nayak, G. Nigmatkulov, L.V. Nogach, S.Y. Noh, J. Novak, S.B. Nurushev, G. Odyniec, A. Ogawa, K. Oh, V. Okorokov, D.L. Olvitt, B.S. Page, Y.X. Pan, Y. Pandit, Y. Panebratsev, T. Pawlak, B. Pawlik, H. Pei, C. Perkins, P. Pile, M. Planinic, J. Pluta, N. Poljak, K. Poniatowska, J. Porter, A.M. Poskanzer, N.K. Pruthi, M. Przybycien, J. Putschke, H. Qiu, A. Quintero, S. Ramachandran, R. Raniwala, S. Raniwala, R.L. Ray, H.G. Ritter, J.B. Roberts, O.V. Rogachevskiy, J.L. Romero, A. Roy, L. Ruan, J. Rusnak, O. Rusnakova, N.R. Sahoo, P.K. Sahu, I. Sakrejda, S. Salur, A. Sandacz, J. Sandweiss, A. Sarkar, J. Schambach, R.P. Scharenberg, A.M. Schmah, W.B. Schmidke, N. Schmitz, J. Seger, P. Seyboth, N. Shah, E. Shahaliev, P.V. Shanmuganathan, M. Shao, B. Sharma, M.K. Sharma, W.Q. Shen, S.S. Shi, Q.Y. Shou, E.P. Sichtermann, M. Simko, M.J. Skoby, D. Smirnov, N. Smirnov, D. Solanki, L. Song, P. Sorensen, H.M. Spinka, B. Srivastava, T.D.S. Stanislaus, R. Stock, M. Strikhanov, B. Stringfellow, M. Sumbera, B.J. Summa, Z. Sun, Y. Sun, X. Sun, X.M. Sun, B. Surrow, D.N. Svirida, M.A. Szelezniak, J. Takahashi, Z. Tang, A.H. Tang, T. Tarnowsky, A.N. Tawfik, J.H. Thomas, A.R. Timmins, D. Tlusty, M. Tokarev, S. Trentalange, R.E. Tribble, P. Tribedy, S.K. Tripathy, B.A. Trzeciak, O.D. Tsai, J. Turnau, T. Ullrich, D.G. Underwood, I. Upsal, G. Van Buren, G. van Nieuwenhuizen, M. Vandenbroucke, R. Varma, G.M.S. Vasconcelos, A.N. Vasiliev, R. Vertesi, F. Videbaek, Y.P. Viyogi, S. Vokal, S.A. Voloshin, A. Vossen, J.S. Wang, Y. Wang, F. Wang, G. Wang, H. Wang, J.C. Webb, G. Webb, L. Wen, G.D. Westfall, H. Wieman, S.W. Wissink, R. Witt, Y.F. Wu, Z. Xiao, W. Xie, K. Xin, Q.H. Xu, H. Xu, N. Xu, Y.F. Xu, Z. Xu, W. Yan, Y. Yang, Q. Yang, C. Yang, S. Yang, Z. Ye, P. Yepes, L. Yi, K. Yip, I.-K. Yoo, N. Yu, H. Zbroszczyk, W. Zha, J.B. Zhang, X.P. Zhang, S. Zhang, Z. Zhang, Y. Zhang, J.L. Zhang, F. Zhao, J. Zhao, C. Zhong, X. Zhu, Y. Zoulkarneeva, and M. Zyzak

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Time projection chamber, 010308 nuclear & particles physics, Multiplicity (mathematics), 01 natural sciences, Charged particle, Nuclear physics, Correlation, Deuterium, 0103 physical sciences, Quark–gluon plasma, Nuclear Experiment, 010306 general physics, Jet quenching, Relativistic Heavy Ion Collider
Abstract

Dihadron correlations are analyzed in sNN=200 GeV d+Au collisions classified by forward charged particle multiplicity and zero-degree neutral energy in the Au-beam direction. It is found that the jetlike correlated yield increases with the event multiplicity. After taking into account this dependence, the non-jet contribution on the away side is minimal, leaving little room for a back-to-back ridge in these collisions.

Published
2015

97. A DNS study of self-accelerating cylindrical hydrogen–air flames with detailed chemistry

Author

Chun Sang Yoo, J.H. Chen, Yuxuan Xin, and C.K. Law

Subjects
Premixed flame, Laminar flame speed, Chemistry, Mechanical Engineering, General Chemical Engineering, Diffusion flame, Analytical chemistry, Direct numerical simulation, Radius, Mechanics, Combustion, Flame speed, Lewis number, Physics::Fluid Dynamics, Chemical Engineering(all), Physics::Chemical Physics, Physical and Theoretical Chemistry
Abstract

The self-accelerating expanding cylindrical stoichiometric hydrogen–air flames at eight atmospheres were studied via two-dimensional direct numerical simulation (DNS) of the full compressible Navier–Stokes equations with detailed chemistry. The flame morphology and propagation were finely resolved by the application of a time step of 2.5 ns and a grid size of 4 μm. Temporally, the intermittent propagation of the flame front is captured through examining its propagation velocity. Spatially, the flame front is found to be comprised of segments exhibiting similar propagation properties, i.e. the intermittent instantaneous propagation of the flame front is attributed to the development of cellular structures induced by hydrodynamic instability. The long-term average propagation velocity of the flame front is described by a power law, with a self-acceleration exponent of 1.22 for the flame radius with respect to time. The increase in the global flame velocity is shown to be primarily a consequence of increased flame surface area, with the local front propagation velocity remaining largely at the constant laminar flame speed for the near-unity Lewis number mixture studied herein.

Published
2015

98. STAR Collaboration

Author

B.I. Abelev, J. Adams, M.M. Aggarwal, Z. Ahammed, J. Amonett, B.D. Anderson, M. Anderson, D. Arkhipkin, G.S. Averichev, Y. Bai, J. Balewski, O. Barannikova, L.S. Barnby, J. Baudot, S. Bekele, V.V. Belaga, A. Bellingeri-Laurikainen, R. Bellwied, F. Benedosso, S. Bhardwaj, A. Bhasin, A.K. Bhati, H. Bichsel, J. Bielcik, J. Bielcikova, L.C. Bland, S.-L. Blyth, B.E. Bonner, M. Botje, J. Bouchet, A.V. Brandin, A. Bravar, M. Bystersky, R.V. Cadman, X.Z. Cai, H. Caines, M. Calderón de la Barca Sánchez, J. Castillo, O. Catu, D. Cebra, Z. Chajecki, P. Chaloupka, S. Chattopadhyay, H.F. Chen, J.H. Chen, J. Cheng, M. Cherney, A. Chikanian, W. Christie, J.P. Coffin, T.M. Cormier, M.R. Cosentino, J.G. Cramer, H.J. Crawford, D. Das, S. Das, M. Daugherity, M.M. de Moura, T.G. Dedovich, M. DePhillips, A.A. Derevschikov, L. Didenko, T. Dietel, P. Djawotho, S.M. Dogra, W.J. Dong, X. Dong, J.E. Draper, F. Du, V.B. Dunin, J.C. Dunlop, M.R. Dutta Mazumdar, V. Eckardt, W.R. Edwards, L.G. Efimov, V. Emelianov, J. Engelage, G. Eppley, B. Erazmus, M. Estienne, P. Fachini, R. Fatemi, J. Fedorisin, K. Filimonov, P. Filip, E. Finch, V. Fine, Y. Fisyak, J. Fu, C.A. Gagliardi, L. Gaillard, M.S. Ganti, V. Ghazikhanian, P. Ghosh, J.E. Gonzalez, Y.G. Gorbunov, H. Gos, O. Grebenyuk, D. Grosnick, S.M. Guertin, K.S.F.F. Guimaraes, N. Gupta, T.D. Gutierrez, B. Haag, T.J. Hallman, A. Hamed, J.W. Harris, W. He, M. Heinz, T.W. Henry, S. Hepplemann, B. Hippolyte, A. Hirsch, E. Hjort, A.M. Hoffman, G.W. Hoffmann, M.J. Horner, H.Z. Huang, S.L. Huang, E.W. Hughes, T.J. Humanic, G. Igo, P. Jacobs, W.W. Jacobs, P. Jakl, F. Jia, H. Jiang, P.G. Jones, E.G. Judd, S. Kabana, K. Kang, J. Kapitan, M. Kaplan, D. Keane, A. Kechechyan, V.Yu. Khodyrev, B.C. Kim, J. Kiryluk, A. Kisiel, E.M. Kislov, S.R. Klein, A. Kocoloski, D.D. Koetke, T. Kollegger, M. Kopytine, L. Kotchenda, V. Kouchpil, K.L. Kowalik, M. Kramer, P. Kravtsov, V.I. Kravtsov, K. Krueger, C. Kuhn, A.I. Kulikov, A. Kumar, A.A. Kuznetsov, M.A.C. Lamont, J.M. Landgraf, S. Lange, S. LaPointe, F. Laue, J. Lauret, A. Lebedev, R. Lednicky, C.-H. Lee, S. Lehocka, M.J. LeVine, C. Li, Q. Li, Y. Li, G. Lin, X. Lin, S.J. Lindenbaum, M.A. Lisa, F. Liu, H. Liu, J. Liu, L. Liu, Z. Liu, T. Ljubicic, W.J. Llope, H. Long, R.S. Longacre, W.A. Love, Y. Lu, T. Ludlam, D. Lynn, G.L. Ma, J.G. Ma, Y.G. Ma, D. Magestro, D.P. Mahapatra, R. Majka, L.K. Mangotra, R. Manweiler, S. Margetis, C. Markert, L. Martin, H.S. Matis, Yu.A. Matulenko, C.J. McClain, T.S. McShane, Yu. Melnick, A. Meschanin, J. Millane, M.L. Miller, N.G. Minaev, S. Mioduszewski, C. Mironov, A. Mischke, D.K. Mishra, J. Mitchell, B. Mohanty, L. Molnar, C.F. Moore, D.A. Morozov, M.G. Munhoz, B.K. Nandi, C. Nattrass, T.K. Nayak, J.M. Nelson, P.K. Netrakanti, L.V. Nogach, S.B. Nurushev, G. Odyniec, A. Ogawa, V. Okorokov, M. Oldenburg, D. Olson, M. Pachr, S.K. Pal, Y. Panebratsev, S.Y. Panitkin, A.I. Pavlinov, T. Pawlak, T. Peitzmann, V. Perevoztchikov, C. Perkins, W. Peryt, S.C. Phatak, R. Picha, M. Planinic, J. Pluta, N. Poljak, N. Porile, J. Porter, A.M. Poskanzer, M. Potekhin, E. Potrebenikova, B.V.K.S. Potukuchi, D. Prindle, C. Pruneau, J. Putschke, G. Rakness, R. Raniwala, S. Raniwala, R.L. Ray, S.V. Razin, J. Reinnarth, D. Relyea, F. Retiere, A. Ridiger, H.G. Ritter, J.B. Roberts, O.V. Rogachevskiy, J.L. Romero, A. Rose, C. Roy, L. Ruan, M.J. Russcher, R. Sahoo, T. Sakuma, S. Salur, J. Sandweiss, M. Sarsour, P.S. Sazhin, J. Schambach, R.P. Scharenberg, N. Schmitz, K. Schweda, J. Seger, I. Selyuzhenkov, P. Seyboth, A. Shabetai, E. Shahaliev, M. Shao, M. Sharma, W.Q. Shen, S.S. Shimanskiy, E. Sichtermann, F. Simon, R.N. Singaraju, N. Smirnov, R. Snellings, G. Sood, P. Sorensen, J. Sowinski, J. Speltz, H.M. Spinka, B. Srivastava, A. Stadnik, T.D.S. Stanislaus, R. Stock, A. Stolpovsky, M. Strikhanov, B. Stringfellow, A.A.P. Suaide, E. Sugarbaker, M. Sumbera, Z. Sun, B. Surrow, M. Swanger, T.J.M. Symons, A. Szanto de Toledo, A. Tai, J. Takahashi, A.H. Tang, T. Tarnowsky, D. Thein, J.H. Thomas, A.R. Timmins, S. Timoshenko, M. Tokarev, T.A. Trainor, S. Trentalange, R.E. Tribble, O.D. Tsai, J. Ulery, T. Ullrich, D.G. Underwood, G. Van Buren, N. van der Kolk, M. van Leeuwen, A.M. Vander Molen, R. Varma, I.M. Vasilevski, A.N. Vasiliev, R. Vernet, S.E. Vigdor, Y.P. Viyogi, S. Vokal, S.A. Voloshin, W.T. Waggoner, F. Wang, G. Wang, J.S. Wang, X.L. Wang, Y. Wang, J.W. Watson, J.C. Webb, G.D. Westfall, A. Wetzler, C. Whitten, H. Wieman, S.W. Wissink, R. Witt, J. Wood, J. Wu, N. Xu, Q.H. Xu, Z. Xu, P. Yepes, I.-K. Yoo, V.I. Yurevich, W. Zhan, H. Zhang, W.M. Zhang, Y. Zhang, Z.P. Zhang, Y. Zhao, C. Zhong, R. Zoulkarneev, Y. Zoulkarneeva, A.N. Zubarev, and J.X. Zuo

Subjects
Nuclear and High Energy Physics
Published
2014

99. Study of growing zinc oxide on polycrystalline silicon/glass substrate prepared by aluminum-induced crystallization of amorphous silicon

Author

W.J. Yan, J.D. Hwang, and J.H. Chen

Subjects
Amorphous silicon, Materials science, Mechanical Engineering, Inorganic chemistry, Nanocrystalline silicon, chemistry.chemical_element, Substrate (electronics), Zinc, engineering.material, Condensed Matter Physics, law.invention, chemistry.chemical_compound, Polycrystalline silicon, Chemical engineering, X-ray photoelectron spectroscopy, chemistry, Mechanics of Materials, law, engineering, General Materials Science, Crystallization, Layer (electronics)
Abstract

Zinc oxide (ZnO) was grown on a polycrystalline silicon (pc-Si)/glass substrate prepared by the aluminum-induced crystallization (AIC) of amorphous silicon. ZnO directly grown on the AIC-pc-Si exhibits many defects with a distribution unlike that of conventional ZnO; the defect density is highest near the conduction band and decreases near the valence band. The defects can be greatly suppressed by depositing an epitaxial silicon (Epi-Si) layer on the AIC-pc-Si. The resulting defect distribution is similar to that of ZnO grown on a crystalline Si (c-Si) substrate. X-ray diffraction shows that the epitaxial silicon layer can improve the crystallization of ZnO. However, the AIC-pc-Si and Epi-Si/AIC-pc-Si substrates exhibit rougher surfaces; consequently, the ZnO has a more random structure and lower density than that grown on a c-Si substrate. X-ray photoelectron spectroscopy demonstrates that as compared to the ZnO grown on the AIC-pc-Si, the defect ratio could be dramatically reduced from 0.70 to 0.56 by depositing an epitaxial silicon layer on AIC-pc-Si, and the defect ratio is about the same as that (0.55) for the ZnO grown on a c-Si substrate.

Published
2014

100. Direct Observation on the Evolution of Shear Banding and Buckling in Tungsten Fiber Reinforced Zr-Based Bulk Metallic Glass Composite

Author

Yongxing Chen, Lanhong Dai, H.F. Zhang, X. W. Chen, J.H. Chen, Huazhu Fu, and Minqiang Jiang

Subjects
Materials science, Structural material, Amorphous metal, Composite number, Metals and Alloys, chemistry.chemical_element, Tungsten, Condensed Matter Physics, Condensed Matter::Soft Condensed Matter, Deformation mechanism, Buckling, Shear (geology), chemistry, Mechanics of Materials, Composite material, Deformation (engineering)
Abstract

The evolution of micro-damage and deformation of each phase in the composite plays a pivotal role in the clarification of deformation mechanism of composite. However, limited model and mechanical experiments were conducted to reveal the evolution of the deformation of the two phases in the tungsten fiber reinforced Zr-based bulk metallic glass composite. In this study, quasi-static compressive tests were performed on this composite. For the first time, the evolution of micro-damage and deformation of the two phases in this composite, i.e., shear banding of the metallic glass matrix and buckling deformation of the tungsten fiber, were investigated systematically by controlling the loading process at different degrees of deformation. It is found that under uniaxial compression, buckling of the tungsten fiber occurs first, while the metallic glass matrix deforms homogeneously. Upon further loading, shear bands initiate from the fiber/matrix interface and propagate in the metallic glass matrix. Finally, the composite fractures in a mixed mode, with splitting in the tungsten fiber, along with shear fracture in the metallic glass matrix. Through the analysis on the stress state in the composite and resistance to shear banding of the two phases during compressive deformation, the possible deformation mechanism of the composite is unveiled. The deformation map of the composite, which covers from elastic deformation to final fracture, is obtained as well.

Published
2014

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