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251. System size dependence of associated yields in hadron-triggered jets

Author

F. Videbæk, B. Grube, A. Feng, G. Webb, O. I. Mall, Q. H. Xu, Jay Roberts, A. Ridiger, A. Chikanian, V. N. Tram, W. Guryn, D. Arkhipkin, A. Hamed, Y. Panebratsev, A. Iordanova, D. Grosnick, V. Kouchpil, D. Thein, R. N. Singaraju, L. Huo, A. P. Meschanin, Jorn Henning Putschke, A. V. Brandin, H. Okada, T. S. McShane, M. S. Ganti, M. Kopytine, M. Tokarev, S. E. Vigdor, C. Roy, B. V.K.S. Potukuchi, Yi Zhang, M. Calderon De La Barca Sanchez, O. Catu, Madan M. Aggarwal, W. Christie, P. R. Pujahari, T. P. Burton, P. Chaloupka, A. Shabetai, Chitrasen Jena, Raimond Snellings, Christian Claude Kuhn, X. L. Wang, J. Engelage, S. Heppelmann, Yu-Gang Ma, Rolf K. Reed, O. G. Grebenyuk, L. Kotchenda, W. M. Zhang, A. Kocoloski, J. C. Dunlop, Y. P. Lu, M. Cherney, Xiangming Sun, V. Perevoztchikov, Basanta Kumar Nandi, S. Zhang, B. Biritz, V. Ghazikhanian, S. Dash, R. Fatemi, Michael Joseph Betancourt, V. A. Okorokov, T. D. S. Stanislaus, J. Fedorisin, B. Haag, Xuan Zhang, M. van Leeuwen, X. Dong, Jie Liu, Andrey Vasiliev, A. G. Knospe, K. Krueger, A. Geromitsos, F. Du, D. D. Koetke, J. E. Draper, H. H. Wieman, J. Ulery, H. G. Ritter, J. A. Vanfossen, S. Baumgart, Fuqiang Wang, S. K. Pal, Hanna Paulina Zbroszczyk, Premomoy Ghosh, J. M. Landgraf, D. Tlusty, Mirko Planinic, L. K. Mangotra, P. Sorensen, X. H. Shi, O. Barannikova, R. Bellwied, D. R. Beavis, Janet Elizabeth Seger, Russell Richard Betts, L. V. Nogach, M. J. Ng, R. S. Longacre, I. Sakrejda, S. Bueltmann, Matthew Walker, A. M. Hoffman, D. G. Underwood, M. Strikhanov, Lijuan Ruan, E. P. Sichtermann, V. I. Kravtsov, Y. N. Gorbunov, Zebo Tang, R. Manweiler, Peter Graham Jones, Yong Xu, Zubayer Ahammed, M. J. LeVine, L. Gaillard, L. C. Bland, Sergey Voloshin, J. X. Zuo, V. Emelianov, D. Keane, W. He, Bedangadas Mohanty, J. Balewski, Marek Bombara, J. L. Romero, A. M. Poskanzer, Christine Nattrass, Ki-Seok Choi, M. Shao, Rashmi Raniwala, P. Kurnadi, Nikolai Smirnov, J. Mitchell, W. J. Llope, Claude Andre Pruneau, L. G. Efimov, S. M. Guertin, E. Finch, Thomas Michael Cormier, H. Z. Huang, S. Vokal, Debasish Das, Raghunath Sahoo, B. D. Anderson, J. Sandweiss, Y. J. Sun, Lokesh Kumar, F. Liu, Elena Bruna, T. J. Hallman, J. Cheng, Zhenyu Zhang, Z. Chajecki, Y. Yang, Alexandre Alarcon Do Passo Suaide, S. LaPointe, N. Li, S. Chattopadhyay, C-H. Lee, T. K. Nayak, A. Kechechyan, Andre Mischke, T. J. M. Symons, L. Didenko, L. Liu, C. L. Jones, B. E. Bonner, M. A.C. Lamont, M. R. Cosentino, A. Gordon, Z. J. Sun, O. D. Tsai, J. Baudot, M. C. Suarez, S. Kabana, T. Ullrich, D. P. Mahapatra, C-Q. Li, M. Elnimr, M. Krus, G. Igo, M. Wada, R. Cendejas, Guo-Liang Ma, M. Sharma, N. K. Pruthi, M. C. Cervantes, C. Perkins, R. S. Hollis, Y. P. Viyogi, R. Zoulkarneev, J. S. Wang, A. M. Vander Molen, R. D. Majka, K. Kang, F. Benedosso, J. Bouchet, J. Bielcikova, T. Peitzmann, R. P. Scharenberg, Christina Markert, E. Hjort, H. S. Matis, M. Bystersky, Y. F. Wu, William Axel Leight, G. Eppley, Z. Xu, G. Lin, S. Margetis, A. S. Hirsch, J. C. Webb, P. Kravtsov, R. F. Clarke, J. Schambach, S. R. Klein, T. Tarnowsky, N. L. Subba, Anju Bhasin, J. Kiryluk, W. L. Zhan, L. Eun, Anik Gupta, R. Witt, M. DePhillips, Andrew Rose, Y. Zhao, J. Pluta, R. P. Redwine, D. L. Olson, A. K. Bhati, Sevil Salur, Y. Wang, A. Lebedev, J. Sowinski, Jongmin Lee, R. L. Ray, W. W. Jacobs, Michal Sumbera, M. J. Skoby, Frank Jm Geurts, J. Lauret, E. Elhalhuli, J. G. Cramer, T. G. Dedovich, Ermes Braidot, M. Botje, D. Staszak, M. S. Daugherity, A. A. Derevschikov, A. L. Trattner, T. Sakuma, S. C. Phatak, M. Pachr, D. A. Morozov, R. E. Tribble, Jifa Tian, T. Ljubicic, X. Cai, Ross Milner, S. Mioduszewski, V. Yu Khodyrev, R. Lednicky, P. Djawotho, Adam Ryszard Kisiel, H. Caines, Sudhir Raniwala, J. W. Harris, V. Fine, Wei Xie, Gerald W Hoffmann, W. T. Waggoner, J. Joseph, H. J. Crawford, G. M.S. Vasconcelos, Y. Fisyak, M. Sarsour, Sergey Timoshenko, Frank Simon, S. W. Wissink, Jake Y. Chen, Y. Pandit, N. Schmitz, T. J. Humanic, Wolfgang Korsch, P. Fachini, K. S.F.F. Guimaraes, E. Shahaliev, G. Van Buren, Qian Yue, Anthony R. Timmins, B. K. Srivastava, I. M. Vasilevski, R. Varma, Yu A. Matulenko, B. S. Page, Nikola Poljak, G. Wang, A. Ogawa, H. F. Chen, P. Yepes, Thomas A. Trainor, W. R. Edwards, D. P. Kikola, P. Seyboth, E. J. Garcia-Solis, S. S. Shi, B. Stringfellow, A. H. Tang, N. G. Minaev, T. W. Ludlam, J. M. Nelson, R. Derradi de Souza, B. I. Abelev, Xiong Wang, Yan Li, M. J. M. Codrington, Jing-Han Chen, W. Peryt, Boris Hippolyte, M. Heinz, David Jonathan Hofman, A. Stadnik, Peter Martin Jacobs, J. Takahashi, Lee Stuart Barnby, N. Xu, P. Filip, S. B. Nurushev, Jaroslav Bielcik, G. D. Westfall, I. K. Yoo, Petr Jákl, M. R. Dutta Mazumdar, O. V. Rogachevskiy, D. R. Gangadharan, E. G. Judd, W. A. Love, C. A. Whitten, Feng Jin, R. Corliss, S. J. Lindenbaum, I. Selyuzhenkov, Bernd Surrow, Pawan Kumar Netrakanti, C. A. Gagliardi, Marcelo Gameiro Munhoz, D. J. Prindle, M. A. Lisa, J. H. Thomas, B. Erazmus, Neeraj Gupta, D. Cebra, S. Trentalange, M. Estienne, D. Kettler, H. Bichsel, G. Odyniec, Y. Zoulkarneeva, C. Zhong, Q. Wang, M. J. Russcher, Jing Zhou, G. S. Averichev, K. Kajimoto, M. Zawisza, H. M. Spinka, L. C. De Silva, A. Szanto de Toledo, J. Kapitan, S. M. Dogra, T. Pawlak, J. L. Drachenberg, Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), STAR, and 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)

Subjects
heavy ion, scattering, fragmentation, Nuclear and High Energy Physics, di-hadron fragmentation function, Hadron, chemistry.chemical_element, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Nuclear physics, Fragmentation (mass spectrometry), 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Jet quenching, Nuclear Experiment, Size dependence, Physics, Quantitative Biology::Neurons and Cognition, 010308 nuclear & particles physics, Angular distance, Copper, parton energy loss, 25.75.-q, 25.75.Gz, jet quenching, Deuterium, chemistry, Transverse momentum, relativistic heavy-ion collisions
Abstract

We present results on the system size dependence of high transverse momentum di-hadron correlations at $\sqrt{s_{NN}}$ = 200 GeV as measured by STAR at RHIC. Measurements in d+Au, Cu+Cu and Au+Au collisions reveal similar jet-like correlation yields at small angular separation ($\Delta\phi\sim0$, $\Delta\eta\sim0$) for all systems and centralities. Previous measurements have shown that the away-side yield is suppressed in heavy-ion collisions. We present measurements of the away-side suppression as a function of transverse momentum and centrality in Cu+Cu and Au+Au collisions. The suppression is found to be similar in Cu+Cu and Au+Au collisions at a similar number of participants. The results are compared to theoretical calculations based on the parton quenching model and the modified fragmentation model. The observed differences between data and theory indicate that the correlated yields presented here will provide important constraints on medium density profile and energy loss model parameters., Comment: 12 pages, 5 figures

Published
2009
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252. Using simply self-injection technology for low cost upstream signal in 10 Gbps TDM-PON

Author

Y. F. Wu, Sien Chi, Chien-Hung Yeh, Chi-Wai Chow, C.H. Wang, and F. Y. Shih

Subjects
Network architecture, Computer science, business.industry, Bandwidth (signal processing), Laser, Passive optical network, law.invention, Semiconductor laser theory, Time-division multiplexing, law, Telecommunications link, Bit error rate, business, Computer hardware, Computer network
Abstract

In this paper, we propose and experimentally investigate a simple self-injection Fabry-Perot laser scheme on each optical network unit (ONU) for 10 Gbps TDM passive optical networks (PONs). Based on the proposed four piped 2.5 Gbps lasers, the 10 Gbps uplink traffic can be easily achieved at a cost-effective way. The network architecture and performance have also been analyzed and discussed.

Published
2008

253. Forward Neutral-Pion Transverse Single-Spin Asymmetries inp+pCollisions ats=200 GeV

Author

A. I. Pavlinov, B. E. Bonner, F. Liu, A. Ridiger, J. Engelage, M. L. Miller, Thorsten Sven Kollegger, O. D. Tsai, L. K. Mangotra, R. Manweiler, S. Heppelmann, M. C. Cervantes, Hong Liu, Kyungeon Choi, L. Kotchenda, Premomoy Ghosh, T. Dietel, Mirko Planinic, J. Tatarowicz, I. Selyuzhenkov, G. Van Buren, J. M. Landgraf, M. Heinz, Lee Stuart Barnby, Jaroslav Bielcik, Sergey Voloshin, Christine Nattrass, A. M. Poskanzer, X. L. Wang, R. D. Majka, M. Strikhanov, Y. N. Gorbunov, G. Wang, P. Seyboth, E. J. Garcia-Solis, B. Haag, B. Grube, D. D. Koetke, S. L. Blyth, G. M.S. Vasconcelos, M. R. Dutta Mazumdar, J. E. Draper, S. Margetis, R. F. Clarke, J. Schambach, N. Schmitz, T. J. Humanic, E. Shahaliev, T. W. Ludlam, H. Zhang, O. V. Rogachevskiy, Zebo Tang, R. Derradi de Souza, B. I. Abelev, F. Videbæk, W. Guryn, A. Kechechyan, Andre Mischke, J. Sandweiss, J. Baudot, W. Zhan, M. Wada, A. M. Vander Molen, E. Hjort, Y. F. Wu, Gregory Rakness, I. A. Qattan, Z. Chajecki, J. M. Nelson, M. van Leeuwen, X. Dong, Bedangadas Mohanty, W. A. Love, J. P. Coffin, Sukalyan Chattopadhyay, O. G. Grebenyuk, B. Erazmus, W. Christie, V. Ghazikhanian, Sevil Salur, Y. Wang, Yan Li, W. Peryt, S. K. Pal, T. W. Henry, C-Q. Li, Marek Bombara, H. Z. Huang, J. L. Romero, M. S. Ganti, S. Vokal, J. Langdon, Jie Liu, T. P. Burton, D. Thein, E. Finch, R. P. Scharenberg, Christina Markert, M. J. M. Codrington, C. Perkins, W. M. Zhang, Bernd Surrow, E. P. Sichtermann, Andrey Vasiliev, H. S. Matis, M. Kopytine, J. Fu, T. Peitzmann, M. Tokarev, K. Kang, P. Djawotho, I. Sakrejda, W. W. Jacobs, D. Cebra, J. Lauret, J. Kiryluk, Pawan Kumar Netrakanti, Z. Xu, G. Lin, K. Kajimoto, M. Bystersky, J. Balewski, Rashmi Raniwala, D. R. Beavis, Claude Andre Pruneau, M. Calderon De La Barca Sanchez, A. Shabetai, R. Lednicky, M. J. Horner, S. Trentalange, M. Estienne, Y. P. Lu, J. H. Chen, C. A. Gagliardi, O. Catu, Janet Elizabeth Seger, N. van der Kolk, C. Miller, J. X. Zuo, T. D. S. Stanislaus, A. M. Hoffman, H. H. Wieman, V. Perevoztchikov, N. T. Porile, S. M. Guertin, Alexandre Alarcon Do Passo Suaide, D. A. Morozov, Sergey Timoshenko, Jianhong Wu, Madan M. Aggarwal, Fuqiang Wang, R. Fatemi, E. W. Hughes, Morton Kaplan, A. Kocoloski, T. Ullrich, Q. H. Xu, Anju Bhasin, Z. J. Sun, R. Zoulkarneev, X. Z. Cai, Q. Li, E. Elhalhuli, V. Emelianov, A. K. Bhati, D. Keane, S. Dash, K. L. Kowalik, D. P. Mahapatra, H. Bichsel, K. Krueger, J. L. Drachenberg, G. Odyniec, Y. Zoulkarneeva, C. Zhong, Jifa Tian, S. LaPointe, Nikolai Smirnov, R. Stock, J. Mitchell, L. G. Efimov, Qian Yue, L. Eun, A. Lebedev, David Jonathan Hofman, R. S. Hollis, J. W. Harris, Xuan Wang, A. Ogawa, H. F. Chen, W. J. Llope, A. Gordon, Frank Simon, M. Potekhin, C. Nepali, Thomas A. Trainor, W. R. Edwards, C-H. Lee, T. K. Nayak, M. M. de Moura, A. Stadnik, W. T. Waggoner, R. L. Ray, Jorn Henning Putschke, Guo-Liang Ma, A. V. Brandin, Anthony R. Timmins, Peter Martin Jacobs, M. Botje, H. Okada, David Lynn, P. Yepes, Q. Wang, M. J. Russcher, D. Staszak, C. A. Whitten, Feng Jin, Y. Fisyak, S. Bueltmann, I. K. Yoo, Renaud Vernet, J. Takahashi, A. H. Tang, Y. Panebratsev, D. Grosnick, S. E. Vigdor, T. Ljubicic, N. Gupta, A. Feng, Christian Claude Kuhn, V. Kouchpil, S. B. Nurushev, H. Caines, Sudhir Raniwala, A. S. Hirsch, J. C. Webb, D. Relyea, S. Lange, P. Kravtsov, J. H. Thomas, S. J. Lindenbaum, J. S. Wang, J. Callner, J. G. Ma, Jing Zhou, Jay Roberts, P. Fachini, J. Sowinski, K. S.F.F. Guimaraes, S. U. Chung, D. Kettler, E. G. Judd, B. V.K.S. Potukuchi, Yu-Gang Ma, W. He, Marcelo Gameiro Munhoz, D. J. Prindle, G. S. Averichev, N. G. Minaev, M. Cherney, J. Speltz, N. Xu, Thomas Michael Cormier, M. DePhillips, P. Filip, M. A. Lisa, E. Braidot, M. Sarsour, G. D. Westfall, M. Zawisza, H. M. Spinka, Jana Bielcikova, Michal Sumbera, Petr Jákl, Y. Bai, P. Sorensen, X. H. Shi, Peter Graham Jones, S. W. Wissink, Y. Zhang, Nikola Poljak, L. Didenko, Adam Ryszard Kisiel, J. C. Dunlop, H. J. Crawford, S. R. Klein, T. Tarnowsky, N. L. Subba, D. L. Olson, Zubayer Ahammed, M. J. LeVine, A. A. Derevschikov, A. L. Trattner, C. Roy, H. Gos, P. Chaloupka, R. Witt, S. Mioduszewski, V. Yu Khodyrev, B. K. Srivastava, I. M. Vasilevski, A. Gupta, S. Bhardwaj, Boris Hippolyte, Basanta Kumar Nandi, S. Zhang, V. A. Okorokov, A. Chikanian, M. J. Skoby, V. N. Tram, D. Arkhipkin, A. Hamed, V. Fine, Jake Y. Chen, A. Iordanova, R. N. Singaraju, A. P. Meschanin, A. Kumar, F. Du, V. Rykov, L. V. Nogach, M. J. Ng, Manish Sharma, R. S. Longacre, V. I. Kravtsov, Debasish Das, Raghunath Sahoo, M. A.C. Lamont, P. Kurnadi, G. Igo, J. Bouchet, Zhenyu Zhang, M. R. Cosentino, J. Millane, Andrew Rose, Y. Zhao, F. Benedosso, T. G. Dedovich, T. Sakuma, S. C. Phatak, M. S. Daugherity, L. C. Bland, J. Fedorisin, A. G. Knospe, L. Liu, M. C. Suarez, Raimond Snellings, J. Ulery, H. G. Ritter, F. Laue, A. Szanto de Toledo, J. Kapitan, O. Barannikova, R. Bellwied, L. Gaillard, S. M. Dogra, Xiangming Sun, T. Pawlak, X. Lin, Russell Richard Betts, D. G. Underwood, Lijuan Ruan, B. D. Anderson, M. Shao, T. J. Hallman, J. Cheng, T. J. M. Symons, N. K. Pruthi, R. Varma, G. Eppley, Yu A. Matulenko, B. Stringfellow, J. Pluta, M. Pachr, R. E. Tribble, Gerald W Hoffmann, J. G. Cramer, N. Zachariou, T. S. McShane, S. Baumgart, S. Kabana, and Y. P. Viyogi

Subjects
Quantum chromodynamics, Physics, Particle physics, Proton, Meson, 010308 nuclear & particles physics, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Hadron, General Physics and Astronomy, Perturbative QCD, 7. Clean energy, 01 natural sciences, Gluon, Nuclear physics, Pion, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon
Abstract

We report precision measurements of the Feynman x (x(F)) dependence, and first measurements of the transverse momentum (p(T)) dependence, of transverse single-spin asymmetries for the production of pi(0) mesons from polarized proton collisions at s=200 GeV. The x(F) dependence of the results is in fair agreement with perturbative QCD model calculations that identify orbital motion of quarks and gluons within the proton as the origin of the spin effects. Results for the p(T) dependence at fixed x(F) are not consistent with these same perturbative QCD-based calculations.

Published
2008

254. Spin alignment measurements of theK*0(892)andϕ(1020)vector mesons in heavy ion collisions atsNN=200GeV

Author

Zhenyu Zhang, M. R. Cosentino, F. Benedosso, V. Fine, Jake Y. Chen, T. G. Dedovich, T. Sakuma, S. C. Phatak, F. Du, V. Rykov, L. V. Nogach, M. J. Ng, V. I. Kravtsov, H. Zhang, I. Sakrejda, J. X. Zuo, David Jonathan Hofman, Kyungeon Choi, L. Kotchenda, A. M. Vander Molen, A. Stadnik, R. S. Longacre, S. LaPointe, A. Gordon, Peter Martin Jacobs, G. Eppley, Y. F. Wu, Xu Cai, Gang Wang, J. Takahashi, Debasish Das, Raghunath Sahoo, J. Pluta, S. B. Nurushev, M. A.C. Lamont, G. Igo, D. Thein, T. P. Burton, J. Bouchet, J. Millane, P. Djawotho, M. Pachr, R. E. Tribble, Andrew Rose, Y. Zhao, Gerald W Hoffmann, Morton Kaplan, S. M. Guertin, M. Sharma, M. Kopytine, Alexandre Alarcon Do Passo Suaide, J. S. Wang, R. N. Singaraju, A. P. Meschanin, Raimond Snellings, N. G. Minaev, D. P. Mahapatra, G. Van Buren, Mikhail Tokarev, Xiangming Sun, R. S. Hollis, S. S. Shi, T. W. Ludlam, J. G. Cramer, J. M. Nelson, C. Nepali, Yinina Ma, T. D. S. Stanislaus, Jorn Henning Putschke, B. D. Anderson, A. V. Brandin, Yan Li, H. Okada, W. Peryt, V. Ghazikhanian, H. H. Wieman, W. Christie, N. K. Pruthi, S. E. Vigdor, C. A. Whitten, Marek Bombara, Christian Claude Kuhn, L. K. Mangotra, W. M. Zhang, Andrey Vasiliev, Adam Ryszard Kisiel, J. L. Romero, H. J. Crawford, R. Manweiler, Xiaoyu Wang, F. Laue, Shaobo Zhang, A. Chikanian, M. J. Skoby, S. Lange, E. Finch, R. Fatemi, Jana Bielcikova, Christine Nattrass, V. N. Tram, A. Szanto de Toledo, A. M. Poskanzer, J. L. Drachenberg, K. Krueger, S. J. Lindenbaum, Q. H. Xu, H. Z. Huang, S. Vokal, K. Kajimoto, J. Kapitan, S. M. Dogra, N. Xu, P. Filip, Z. J. Sun, Janet Elizabeth Seger, Thomas Peitzmann, P. Sorensen, G. D. Westfall, D. Arkhipkin, A. Hamed, Peter Graham Jones, A. M. Hoffman, A. Kechechyan, Andre Mischke, G. M.S. Vasconcelos, J. Callner, W. He, T. Pawlak, Petr Jákl, N. Gupta, A. Feng, T. J. Humanic, M. Cherney, Thomas Michael Cormier, Lokesh Kumar, J. W. Harris, R. Cendejas, N. Schmitz, Akash Kumar, E. Shahaliev, A. Iordanova, M. Sarsour, X. Lin, J. Kiryluk, Pijush Ghosh, L. Didenko, X-H. Shi, N. T. Porile, Jay Roberts, P. Seyboth, E. J. Garcia-Solis, C. Roy, Anthony R. Timmins, Qian Yue, D. A. Morozov, B. Grube, J. Baudot, M. Wada, F. Liu, P. Yepes, A. Ridiger, S. Bueltmann, A. H. Tang, Thorsten Sven Kollegger, R. Varma, Yu A. Matulenko, S. Heppelmann, W. Guryn, R. Derradi de Souza, B. I. Abelev, B. Haag, P. Chaloupka, D. D. Koetke, J. E. Draper, B. Stringfellow, S. R. Klein, O. G. Grebenyuk, T. Tarnowsky, N. L. Subba, D. L. Olson, Zebo Tang, J. Fedorisin, Sergei A. Voloshin, J. P. Coffin, Hong Liu, A. G. Knospe, T. S. McShane, Russell Richard Betts, I. A. Qattan, Z. Chajecki, M. J. M. Codrington, D. G. Underwood, Lijuan Ruan, A. A. Derevschikov, S. Baumgart, A. L. Trattner, R. D. Majka, C. Perkins, J. C. Dunlop, Z. Xu, G. Lin, M. Shao, S. Margetis, R. F. Clarke, J. Schambach, Anju Bhasin, T. J. Hallman, J. Cheng, T. J. M. Symons, Sergey Timoshenko, Jianhong Wu, Basanta Kumar Nandi, S. Kabana, J. Tian, E. Elhalhuli, I. Selyuzhenkov, Y. P. Viyogi, Zubayer Ahammed, M. J. LeVine, A. Lebedev, Vitaly Okorokov, M. M. de Moura, B. Biritz, M. Botje, Y. Fisyak, Bernd Surrow, W. T. Waggoner, P. Fachini, M. Calderon De La Barca Sanchez, K. S.F.F. Guimaraes, Pawan Kumar Netrakanti, O. Catu, C. A. Gagliardi, N. van der Kolk, A. Ogawa, A. Kocoloski, Madan M. Aggarwal, H. F. Chen, S. Dash, Thomas A. Trainor, W. R. Edwards, Fuqiang Wang, C-Q. Li, R. Witt, R. P. Scharenberg, Christina Markert, S. Mioduszewski, W. L. Zhan, H. S. Matis, V. Yu Khodyrev, Frank Simon, Subrata Pal, M. Heinz, Lee Stuart Barnby, Jaroslav Bielcik, B. K. Srivastava, I. M. Vasilevski, W. W. Jacobs, J. Lauret, M. R. Dutta Mazumdar, A. Gupta, S. Bhardwaj, Boris Hippolyte, O. V. Rogachevskiy, R. Lednicky, W. A. Love, Y. Panebratsev, D. Grosnick, V. Kouchpil, T. Dietel, B. E. Bonner, Mirko Planinic, O. D. Tsai, M. Elnimr, M. C. Cervantes, Sevil Salur, Y. Wang, V. Emelianov, A. K. Bhati, D. Keane, Y. N. Gorbunov, Nikolai Smirnov, R. Stock, J. Mitchell, L. G. Efimov, C-H. Lee, T. K. Nayak, J. Ulery, H. G. Ritter, Bedangadas Mohanty, O. Barannikova, R. Bellwied, L. Gaillard, M. S. Daugherity, L. C. Bland, L. Liu, M. C. Suarez, J. H. Chen, M. Bystersky, F. Videbæk, Sukalyan Chattopadhyay, M. DePhillips, Michal Sumbera, M. S. Ganti, Y. Bai, S. W. Wissink, Y. Zhang, Nikola Poljak, V. Perevoztchikov, E. W. Hughes, I. K. Yoo, Alexandre Shabetai, M. L. Miller, Y. Lu, D. R. Gangadharan, E. G. Judd, Guo-Liang Ma, A. S. Hirsch, J. C. Webb, P. Kravtsov, J. Sowinski, J. Engelage, J. M. Landgraf, M. Strikhanov, J. Sandweiss, K. Kang, B. V.K.S. Potukuchi, Jie Liu, Hanna Paulina Zbroszczyk, D. R. Beavis, X. L. Wang, C. Zhong, M. van Leeuwen, X. Dong, F. Jin, W. J. Llope, R. L. Ray, D. Staszak, J. H. Thomas, T. Ljubicic, H. Caines, Sudhir Raniwala, E. P. Sichtermann, J. Balewski, Rashmi Raniwala, Claude Andre Pruneau, D. Kettler, T. Ullrich, R. Zoulkarneev, L. Eun, G. S. Averichev, M. Zawisza, H. M. Spinka, H. Bichsel, G. Odyniec, Y. Zoulkarneeva, M. Potekhin, David Lynn, Q. Wang, M. J. Russcher, J. G. Ma, Jing Zhou, B. Erazmus, D. Cebra, S. Trentalange, M. Estienne, S. U. Chung, Marcelo Gameiro Munhoz, D. J. Prindle, M. A. Lisa, E. Braidot, and P. Kurnadi

Subjects
Physics, Density matrix, Nuclear and High Energy Physics, Angular momentum, Meson, Magnetic moment, Spins, 010308 nuclear & particles physics, Polarization (waves), 01 natural sciences, Nuclear physics, 0103 physical sciences, Quark–gluon plasma, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics, Spectroscopy
Abstract

We present the first spin alignment measurements for the K*{sup 0}(892) and (1020) vector mesons produced at midrapidity with transverse momenta up to 5 GeV/c at {radical}s{sub NN} = 200 GeV at RHIC. The diagonal spin-density matrix elements with respect to the reaction plane in Au+Au collisions are {rho}{sub 00} = 0.32 {+-} 0.04 (stat) {+-} 0.09 (syst) for the K*{sup 0} (0.8 < p{sub T} < 5.0 GeV/c) and {rho}{sub 00} = 0.34 {+-} 0.02 (stat) {+-} 0.03 (syst) for the {phi} (0.4 < p{sub T} < 5.0 GeV/c) and are constant with transverse momentum and collision centrality. The data are consistent with the unpolarized expectation of 1/3 and thus no evidence is found for the transfer of the orbital angular momentum of the colliding system to the vector-meson spins. Spin alignments for K*{sup 0} and {phi} in Au+Au collisions were also measured with respect to the particle's production plane. The {phi} result, {rho}{sub 00} = 0.41 {+-} 0.02 (stat) {+-} 0.04 (syst), is consistent with that in p+p collisions, {rho}{sub 00} = 0.39 {+-} 0.03 (stat) {+-} 0.06 (syst), also measured in this work. The measurements thus constrain the possible size of polarization phenomena in the production dynamicsmore » of vector mesons.« less

Published
2008

255. Centrality dependence of charged hadron and strange hadron elliptic flow fromsNN=200GeV Au+Au collisions

Author

R. Fatemi, V. Ghazikhanian, K. Krueger, R. L. Ray, J. S. Wang, J. Callner, Z. Xu, G. Lin, Sergey Voloshin, Christine Nattrass, D. Staszak, Sergey Timoshenko, Marek Bombara, W. He, Jun Takahashi, Anik Gupta, M. Cherney, Thomas Michael Cormier, J. L. Romero, C. W. Whitten, T. Ljubicic, Jana Bielcikova, Jianhong Wu, H. Caines, Sudhir Raniwala, Lokesh Kumar, M. Sarsour, X-H. Shi, P. Sorensen, E. Elhalhuli, M. Calderon De La Barca Sanchez, E. Finch, R. S. Longacre, D. Relyea, W. Christie, J. Baudot, M. Wada, Peter Graham Jones, O. Catu, E. P. Sichtermann, Kyungeon Choi, L. Kotchenda, P. Kurnadi, Debasish Das, Raghunath Sahoo, B. Grube, A. M. Vander Molen, H. Zhang, Y. F. Wu, A. Kocoloski, W. M. Zhang, Andrey Vasiliev, Zhenyu Zhang, J. Balewski, Rashmi Raniwala, M. A.C. Lamont, H. Z. Huang, S. Vokal, W. T. Waggoner, Claude Andre Pruneau, W. Guryn, I. Sakrejda, D. Thein, S. Dash, G. Igo, M. R. Cosentino, K. Kajimoto, T. P. Burton, L. Didenko, T. S. McShane, A. Ogawa, O. G. Grebenyuk, G. M.S. Vasconcelos, Janet Elizabeth Seger, J. Fedorisin, J. H. Thomas, H. F. Chen, W. R. Edwards, J. X. Zuo, T. Ullrich, A. M. Hoffman, F. Benedosso, M. Kopytine, R. Witt, N. Schmitz, E. Shahaliev, P. Djawotho, B. Haag, K. Schweda, M. Tokarev, S. Lange, J. Millane, A. G. Knospe, R. Zoulkarneev, J. Engelage, S. M. Guertin, Alexandre Alarcon Do Passo Suaide, Raimond Snellings, T. Dietel, S. Mioduszewski, J. Kiryluk, S. J. Lindenbaum, Andrew Rose, Y. Zhao, S. LaPointe, W. J. Llope, A. Shabetai, Mirko Planinic, V. Yu Khodyrev, D. P. Mahapatra, R. S. Hollis, D. Kettler, Zebo Tang, Xiangming Sun, N. Xu, P. Filip, L. Eun, S. R. Klein, T. G. Dedovich, T. Tarnowsky, N. L. Subba, A. Gordon, C. Nepali, F. Laue, A. Szanto de Toledo, J. Kapitan, D. L. Olson, Jorn Henning Putschke, B. K. Srivastava, I. M. Vasilevski, T. D. S. Stanislaus, S. Baumgart, H. H. Wieman, S. M. Dogra, I. A. Qattan, Z. Chajecki, F. Liu, Q. H. Xu, S. U. Chung, T. Sakuma, Adam Ryszard Kisiel, G. D. Westfall, S. C. Phatak, A. V. Brandin, Y. N. Gorbunov, Marcelo Gameiro Munhoz, D. J. Prindle, T. Pawlak, H. Okada, G. S. Averichev, L. K. Mangotra, Z. J. Sun, S. Bhardwaj, Boris Hippolyte, Yinina Ma, A. A. Derevschikov, X. Lin, H. J. Crawford, A. L. Trattner, D. A. Morozov, C. Perkins, R. N. Singaraju, R. Manweiler, J. L. Drachenberg, Bedangadas Mohanty, Russell Richard Betts, Petr Jákl, T. Peitzmann, X. L. Wang, R. D. Majka, G. Wang, B. D. Anderson, D. G. Underwood, A. P. Meschanin, V. Fine, S. E. Vigdor, Christian Claude Kuhn, C. Zhong, P. Seyboth, Lijuan Ruan, A. M. Poskanzer, N. Gupta, A. Feng, E. J. Garcia-Solis, J. W. Harris, S. Margetis, R. F. Clarke, J. Schambach, V. Emelianov, A. K. Bhati, D. Keane, M. A. Lisa, Premomoy Ghosh, J. M. Landgraf, Anju Bhasin, Nikolai Smirnov, N. K. Pruthi, C-Q. Li, G. Eppley, M. Shao, Jay Roberts, A. Kechechyan, Andre Mischke, M. van Leeuwen, X. Dong, A. Ridiger, Thorsten Sven Kollegger, T. J. Hallman, J. Cheng, T. J. M. Symons, R. Derradi de Souza, B. I. Abelev, Jake Y. Chen, R. Stock, J. Mitchell, S. Kabana, J. Tian, L. G. Efimov, Y. P. Viyogi, A. Lebedev, Shaobo Zhang, S. K. Pal, R. P. Scharenberg, Christina Markert, Anthony R. Timmins, E. Braidot, H. S. Matis, P. Fachini, F. Jin, P. Yepes, M. M. de Moura, C-H. Lee, T. K. Nayak, B. E. Bonner, M. J. M. Codrington, S. Bueltmann, M. Botje, A. H. Tang, O. D. Tsai, M. C. Cervantes, S. Heppelmann, J. G. Cramer, M. Zawisza, H. M. Spinka, Jie Liu, W. W. Jacobs, J. Lauret, M. Strikhanov, M. Sharma, J. H. Chen, J. Pluta, J. C. Dunlop, Hanna Paulina Zbroszczyk, Y. Fisyak, R. Lednicky, M. Bystersky, B. Erazmus, A. Kumar, F. Du, N. G. Minaev, Zubayer Ahammed, M. J. LeVine, V. Rykov, L. V. Nogach, M. J. Ng, V. I. Kravtsov, Sevil Salur, Y. Wang, D. R. Beavis, Xuejun Wang, Y. Panebratsev, J. Sandweiss, T. J. Humanic, D. Grosnick, V. Kouchpil, D. Cebra, S. Trentalange, M. Estienne, N. T. Porile, Qian Yue, I. K. Yoo, R. Varma, Yu A. Matulenko, D. D. Koetke, J. E. Draper, B. Stringfellow, H. Bichsel, G. Odyniec, Y. Zoulkarneeva, Bernd Surrow, Y. Lu, M. Pachr, K. Kang, M. Potekhin, E. G. Judd, David Lynn, Q. Wang, R. E. Tribble, Basanta Kumar Nandi, M. J. Russcher, M. DePhillips, Pawan Kumar Netrakanti, J. P. Coffin, Michal Sumbera, Gerald W Hoffmann, Y. Bai, J. G. Ma, Jing Zhou, S. W. Wissink, Y. Zhang, C. A. Gagliardi, N. van der Kolk, Nikola Poljak, V. A. Okorokov, B. V.K.S. Potukuchi, M. Heinz, Lee Stuart Barnby, Jaroslav Bielcik, M. R. Dutta Mazumdar, H. Liu, A. Chikanian, M. J. Skoby, O. V. Rogachevskiy, V. N. Tram, W. A. Love, Madan M. Aggarwal, Fuqiang Wang, M. Oldenburg, W. L. Zhan, Frank Simon, D. Arkhipkin, A. Hamed, A. Iordanova, C. Roy, J. Ulery, H. G. Ritter, O. Barannikova, R. Bellwied, L. Gaillard, P. Chaloupka, L. C. Bland, L. Liu, M. C. Suarez, Guo-Liang Ma, A. S. Hirsch, J. C. Webb, P. Kravtsov, M. S. Daugherity, J. Sowinski, M. L. Miller, F. Videbæk, Sukalyan Chattopadhyay, M. S. Ganti, V. Perevoztchikov, E. W. Hughes, I. Selyuzhenkov, G. Van Buren, S. S. Shi, T. W. Ludlam, J. M. Nelson, Yan Li, W. Peryt, David Jonathan Hofman, A. Stadnik, Peter Martin Jacobs, S. B. Nurushev, Morton Kaplan, and X. Z. Cai

Subjects
Physics, Quark, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, 010308 nuclear & particles physics, Nuclear Theory, Hadron, Elliptic flow, 01 natural sciences, Omega, Nuclear physics, 0103 physical sciences, Quark–gluon plasma, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Scaling
Abstract

We present STAR results on the elliptic flow upsilon(2) Of charged hadrons, strange and multistrange particles from,root s(NN) = 200 GeV Au+Au collisions at the BNL Relativistic Heavy Ion Collider (RHIC). The detailed study of the centrality dependence of upsilon(2) over a broad transverse momentum range is presented. Comparisons of different analysis methods are made in order to estimate systematic uncertainties. To discuss the nonflow effect, we have performed the first analysis Of upsilon(2) with the Lee-Yang zero method for K(S)(0) and A. In the relatively low PT region, P(T)

Published
2008

256. Beam-Energy and System-Size Dependence of Dynamical Net Charge Fluctuations

Author

A. V. Brandin, H. Okada, S. E. Vigdor, Christian Claude Kuhn, M. M. De Moira, L. Kotchenda, A. Ridiger, Madan M. Aggarwal, T. S. McShane, J. H. Thomas, H. Zhang, J. S. Wang, E. G. Judd, A. Shabetai, I. Sakrejda, J. X. Zuo, S. LaPointe, Fuqiang Wang, A. Gordon, J. Wu, D. Thein, S. Baumgart, R. Fatemi, G. Eppley, David Jonathan Hofman, S. Bueltmann, D. Kettler, K. Krueger, R. S. Longacre, M. Kopytine, Z. J. Sun, Subhasis Chattopadhyay, Yong Xu, Thomas Peitzmann, M. S. Daugherity, V. Fine, R. Witt, R. L. Ray, M. J. Skoby, D. D. Koetke, J. Callner, M. Calderon De La Barca Sanchez, W. He, P. Fachini, A. Stadnik, M. Cherney, F. Laue, A. Szanto de Toledo, B. Erazmus, J. Kapitan, S. M. Dogra, Zebo Tang, G. S. Averichev, Y. P. Viyogi, Xu Cai, J. Pluta, W. M. Zhang, Andrey Vasiliev, S. Mioduszewski, V. N. Tram, L. C. Bland, Thomas Michael Cormier, Bedangadas Mohanty, Lokesh Kumar, Peter Martin Jacobs, V. Ghazikhanian, M. Sarsour, Debasish Das, Raghunath Sahoo, V. Yu Khodyrev, C. A. Gagliardi, O. Catu, Christine Nattrass, Gang Wang, Subrata Pal, T. D. S. Stanislaus, Z. Chajecki, M. A.C. Lamont, M. L. Miller, D. Staszak, Y. Fisyak, Sergei A. Voloshin, Janet Elizabeth Seger, J. P. Coffin, T. Pawlak, W. L. Zhan, H. H. Wieman, S. M. Guertin, Alexandre Alarcon Do Passo Suaide, B. K. Srivastava, I. M. Vasilevski, J. Takahashi, J. G. Cramer, G. Igo, A. M. Hoffman, M. Pachr, R. E. Tribble, Mikhail Tokarev, Y. Panebratsev, D. Grosnick, Anju Bhasin, P. G. Jones, Frank Simon, K. S.F.F. Guimaraes, J. Engelage, L. K. Mangotra, D. P. Mahapatra, Gerald W Hoffmann, R. S. Hollis, C. Perkins, T. Ljubicic, S. Bhardwaj, Raimond Snellings, S. B. Nurushev, Marek Bombara, J. Bouchet, V. Kouchpil, X. Lin, Boris Hippolyte, J. L. Drachenberg, S. Vokal, R. Manweiler, T. Dictel, S. Zhang, M. Bystersky, Xiangming Sun, P. Seyboth, E. J. Garcia-Solis, A. Lebedev, J. Zhou, Adam Ryszard Kisiel, D. Arkhipkin, A. Kocoloski, B. V.K.S. Potukuchi, A. Hamed, Z. Xu, G. Lin, Yu-Gang Ma, A. Hirsch, Sudhir Raniwala, J. Millane, Premomoy Ghosh, I. Selyuzhenkov, Jana Bielcikova, J. M. Landgraf, M. DePhillips, A. M. Poskanzer, F. Videbæk, M. Botje, N. Gupta, A. Feng, Anik Gupta, R. Derradi de Souza, B. I. Abelev, B. Grube, J. L. Romero, Bernd Surrow, S. Dash, P. Kurnadi, W. J. Llope, Yufeng Zhang, Zhenyu Zhang, Michal Sumbera, J. E. Draper, Jianping Cheng, Andrew Rose, Jay Roberts, P. Sorensen, X. H. Shi, M. Strikhanov, J. Kiryluk, A. Kechechyan, Andre Mischke, Y. Zhao, B. D. Anderson, E. Elhalhuli, M. R. Cosentino, Hank Crawford, K. Kang, M. J. M. Codrington, Y. Bai, K. Kajimoto, Y. Li, J. Baudot, N. T. Porile, R. Cendejas, Qian Yue, M. Wada, Q. H. Xu, N. K. Pruthi, Jifa Tian, H. Caines, Ki-Seok Choi, M. S. Ganti, H. Bichsel, L. G. Efimov, W. Guryn, Pawan Kumar Netrakanti, E. Finch, Yifu Sun, S. W. Wissink, F. Benedosso, J. Sandweiss, D. A. Morozov, W. Christie, A. Iordanova, W. T. Waggoner, Nikola Poljak, L. Didenko, Chitrasen Jena, Samuel Heppelmann, Y. P. Lu, R. N. Singaraju, N. van der Kolk, V. Perevoztchikov, L. Huo, R. Varma, X. L. Wang, J. C. Dunlop, Yu A. Matulenko, A. P. Meschanin, F. Liu, O. G. Grebenyuk, M. Heinz, Lee Stuart Barnby, Morton Kaplan, C. Zhong, T. G. Dedovich, T. P. Burton, Jaroslav Bielcik, J. Liu, Zubayer Ahammed, T. Sakuma, S. R. Klein, S. C. Phatak, M. J. LeVine, T. Tarnowsky, N. L. Subba, Guo-Liang Ma, B. Stringfellow, R. D. Majka, J. Fedorisin, M. Zawisza, H. M. Spinka, Hanna Paulina Zbroszczyk, J. Y. Chen, D. L. Olson, S. Margetis, R. F. Clarke, I. K. Yoo, A. Chikanian, C. Roy, M. van Leeuwen, X. Dong, M. R. Dutta Mazumdar, D. R. Beavis, J. Schambach, G. Van Buren, A. G. Knospe, A. A. Derevschikov, A. L. Trattner, A. Kumar, J. C. Webb, P. Kravtsov, S. S. Shi, O. V. Rogachevskiy, F. Du, C. L. Jones, J. Joseph, Russell Richard Betts, D. R. Gangadharan, V. Emelianov, A. K. Bhati, D. Keane, T. W. Ludlam, G. M.S. Vasconcelos, E. P. Sichtermann, L. V. Nogach, M. J. Ng, J. M. Nelson, J. Balewski, Nikolai Smirnov, V. I. Kravtsov, J. Sowinski, Rashmi Raniwala, V. Rykov, Jing-Han Chen, W. Peryt, Claude Andre Pruneau, J. Mitchell, D. G. Underwood, Lijuan Ruan, C-H. Lee, T. K. Nayak, T. Ullrich, B. E. Bonner, O. D. Tsai, N. Schmitz, S. Kabana, M. Elnimr, R. Zoulkarneev, M. C. Cervantes, L. Eun, E. Shahaliev, Sevil Salur, A. M. Vander Molen, J. G. Ma, E. Hjort, Y. F. Wu, Y. Wang, M. Shao, Thomas Humanic, T. J. Hallman, J. W. Harris, P. Chaloupka, T. J. M. Symons, William Jacobs, Anthony R. Timmins, P. Yepes, A. H. Tang, Basanta Kumar Nandi, B. Biritz, V. A. Okorokov, G. Odyniec, Y. Zoulkarneeva, M. Potekhin, David Lynn, Q. Wang, M. J. Russcher, S. U. Chung, Marcelo Gameiro Munhoz, D. J. Prindle, M. A. Lisa, E. Braidot, D. Cebra, S. Trentalange, M. Estienne, C-Q. Li, R. P. Scharenberg, Christina Markert, H. S. Matis, J. Lauret, R. Lednicky, P. Djawotho, Sergey Timoshenko, Xuan Wang, A. Ogawa, H. F. Chen, W. R. Edwards, Mirko Planinic, Y. N. Gorbunov, C. A. Whitten, Feng Jin, S. J. Lindenbaum, N. Xu, P. Filip, G. D. Westfall, Petr Jákl, M. Sharma, N. G. Minaev, L. Liu, M. C. Suarez, J. Ulery, H. G. Ritter, H. Z. Huang, O. Barannikova, R. Bellwied, L. Gaillard, C. Nepali, Jorn Henning Putschke, Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), 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), STAR, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes)

Subjects
Nuclear and High Energy Physics, Au Collisions, Gev/C, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, 0103 physical sciences, Mean Transverse-Momentum, Rapidity, Multiplicity (chemistry), Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Size dependence, Scaling, Nuclear Collisions, Physics, Signal, 010308 nuclear & particles physics, Heavy-Ion Collisions, Collision, By-Event Fluctuations, NATURAL SCIENCES. Physics, PRIRODNE ZNANOSTI. Fizika, Azimuth, Multiplicity, Pseudorapidity, Quark–gluon plasma, Quark-Gluon Plasma, charge correlation strength, Atomic physics
Abstract

We present measurements of net charge fluctuations in $Au + Au$ collisions at $\sqrt{s_{NN}} = $ 19.6, 62.4, 130, and 200 GeV, $Cu + Cu$ collisions at $\sqrt{s_{NN}} = $ 62.4, 200 GeV, and $p + p$ collisions at $\sqrt{s} = $ 200 GeV using the dynamical net charge fluctuations measure $\nu_{+-{\rm,dyn}}$. We observe that the dynamical fluctuations are non-zero at all energies and exhibit a modest dependence on beam energy. A weak system size dependence is also observed. We examine the collision centrality dependence of the net charge fluctuations and find that dynamical net charge fluctuations violate $1/N_{ch}$ scaling, but display approximate $1/N_{part}$ scaling. We also study the azimuthal and rapidity dependence of the net charge correlation strength and observe strong dependence on the azimuthal angular range and pseudorapidity widths integrated to measure the correlation., Comment: 15 pages, 6 figures, STAR Collaboration

Published
2008
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257. System-Size Independence of Directed Flow Measured at the BNL Relativistic Heavy-Ion Collider

Author

A. M. Vander Molen, Y. F. Wu, B. Grube, M. L. Miller, X. L. Wang, W. Guryn, S. U. Chung, Guo-Liang Ma, Jie Liu, C. Zhong, A. Ridiger, A. S. Hirsch, J. C. Webb, P. Kravtsov, Marcelo Gameiro Munhoz, D. J. Prindle, L. K. Mangotra, R. Manweiler, I. Selyuzhenkov, Adam Ryszard Kisiel, J. Sowinski, J. L. Drachenberg, M. S. Daugherity, C. Roy, O. G. Grebenyuk, J. H. Thomas, C. A. Whitten, Feng Jin, Thorsten Sven Kollegger, A. M. Poskanzer, Bernd Surrow, H. J. Crawford, M. van Leeuwen, X. Dong, S. K. Pal, Hanna Paulina Zbroszczyk, F. Videbæk, Sergey Voloshin, Christine Nattrass, J. Fedorisin, N. Gupta, M. A. Lisa, D. R. Beavis, Sukalyan Chattopadhyay, A. Shabetai, M. S. Ganti, A. Kechechyan, Andre Mischke, Raimond Snellings, A. Feng, Y. P. Lu, V. Perevoztchikov, Y. Yang, E. W. Hughes, Jay Roberts, M. Calderon De La Barca Sanchez, R. S. Longacre, S. Heppelmann, W. Christie, A. G. Knospe, E. P. Sichtermann, Pawan Kumar Netrakanti, E. Braidot, Kyungeon Choi, L. Kotchenda, Z. Xu, G. Lin, R. Cendejas, K. Kang, S. Lange, J. Balewski, Rashmi Raniwala, R. Fatemi, D. Kettler, W. M. Zhang, Andrey Vasiliev, Claude Andre Pruneau, O. Catu, C. A. Gagliardi, S. J. Lindenbaum, G. M.S. Vasconcelos, N. van der Kolk, H. Bichsel, G. Odyniec, Y. Zoulkarneeva, D. D. Koetke, J. E. Draper, C-Q. Li, A. Kumar, Debasish Das, K. Krueger, F. Du, Anik Gupta, N. Xu, P. Filip, D. Thein, J. Ulery, Raghunath Sahoo, T. Ullrich, K. Kajimoto, H. G. Ritter, V. Rykov, M. Potekhin, A. Kocoloski, P. Chaloupka, R. P. Scharenberg, Christina Markert, G. S. Averichev, F. Laue, A. Szanto de Toledo, M. Heinz, Lee Stuart Barnby, R. Zoulkarneev, N. Schmitz, E. Shahaliev, V. Ghazikhanian, Q. H. Xu, Xiangming Sun, Janet Elizabeth Seger, Z. J. Sun, M. A.C. Lamont, L. V. Nogach, M. J. Ng, Jaroslav Bielcik, J. G. Cramer, J. Baudot, M. Wada, G. D. Westfall, A. M. Hoffman, M. Kopytine, J. P. Coffin, Jianhong Wu, O. Barannikova, M. Tokarev, R. Bellwied, G. Igo, David Lynn, Q. Wang, L. Eun, V. I. Kravtsov, H. S. Matis, Marek Bombara, J. L. Romero, M. J. Russcher, R. Witt, J. Callner, A. Chikanian, M. J. Skoby, R. L. Ray, S. Mioduszewski, Petr Jákl, T. D. S. Stanislaus, V. N. Tram, J. Bouchet, L. Gaillard, L. C. Bland, Anju Bhasin, S. Q. Zhang, J. Kapitan, V. Yu Khodyrev, J. Engelage, D. Staszak, T. Ljubicic, S. Dash, L. Liu, H. Z. Huang, S. Vokal, E. Elhalhuli, H. Caines, Sudhir Raniwala, S. M. Dogra, V. Fine, B. K. Srivastava, I. M. Vasilevski, G. Wang, A. Lebedev, M. M. de Moura, M. Botje, J. Millane, T. Pawlak, W. He, M. Cherney, Thomas Michael Cormier, Lokesh Kumar, X. Lin, M. R. Dutta Mazumdar, O. V. Rogachevskiy, M. Sarsour, B. D. Anderson, M. C. Suarez, W. W. Jacobs, J. Lauret, E. Finch, D. Arkhipkin, A. Hamed, P. Seyboth, E. J. Garcia-Solis, Andrew Rose, Y. Zhao, S. M. Guertin, Alexandre Alarcon Do Passo Suaide, J. G. Ma, Jing Zhou, Jake Y. Chen, Premomoy Ghosh, M. Zawisza, H. M. Spinka, W. J. Llope, W. A. Love, Bedangadas Mohanty, T. J. Humanic, J. M. Landgraf, A. Iordanova, T. P. Burton, S. Bhardwaj, J. Kiryluk, Russell Richard Betts, R. Lednicky, M. Strikhanov, N. K. Pruthi, Jifa Tian, D. P. Mahapatra, Boris Hippolyte, J. C. Dunlop, R. Derradi de Souza, B. I. Abelev, N. T. Porile, P. Djawotho, R. S. Hollis, D. G. Underwood, Lijuan Ruan, H. H. Wieman, Zubayer Ahammed, D. A. Morozov, Qian Yue, B. Erazmus, T. Dietel, M. J. LeVine, G. Eppley, Madan M. Aggarwal, Fuqiang Wang, R. N. Singaraju, P. Kurnadi, A. P. Meschanin, J. Sandweiss, F. Liu, M. Sharma, M. Shao, Mirko Planinic, Zhenyu Zhang, T. J. Hallman, R. Varma, Yu A. Matulenko, M. J. M. Codrington, M. R. Cosentino, D. Cebra, J. Cheng, T. J. M. Symons, S. Trentalange, N. G. Minaev, Yong Xu, Basanta Kumar Nandi, M. Estienne, B. Stringfellow, J. Pluta, F. Benedosso, Y. N. Gorbunov, T. S. McShane, R. D. Majka, W. T. Waggoner, B. Biritz, V. A. Okorokov, W. L. Zhan, T. G. Dedovich, S. Margetis, R. F. Clarke, J. Schambach, Morton Kaplan, T. Sakuma, Frank Simon, X. Z. Cai, S. C. Phatak, Y. Fisyak, B. V.K.S. Potukuchi, Yu-Gang Ma, S. Baumgart, J. W. Harris, J. H. Chen, M. Bystersky, M. Pachr, R. E. Tribble, B. Haag, David Jonathan Hofman, Anthony R. Timmins, Sergey Timoshenko, P. Yepes, Gerald W Hoffmann, A. Stadnik, S. Bueltmann, M. DePhillips, Peter Martin Jacobs, A. H. Tang, J. Takahashi, Y. J. Sun, S. B. Nurushev, V. Emelianov, Zebo Tang, Michal Sumbera, G. Van Buren, S. Kabana, Y. Bai, S. S. Shi, I. A. Qattan, T. W. Ludlam, Z. Chajecki, J. M. Nelson, A. K. Bhati, D. Keane, S. W. Wissink, Y. P. Viyogi, Yan Li, W. Peryt, Y. Zhang, C. Perkins, T. Peitzmann, Nikola Poljak, Nikolai Smirnov, Xuan Wang, A. Ogawa, H. F. Chen, Thomas A. Trainor, W. R. Edwards, R. Stock, J. Mitchell, I. K. Yoo, D. R. Gangadharan, E. G. Judd, L. G. Efimov, C-H. Lee, T. K. Nayak, Y. Panebratsev, D. Grosnick, V. Kouchpil, B. E. Bonner, O. D. Tsai, M. Elnimr, M. C. Cervantes, Sevil Salur, Y. Wang, J. S. Wang, C. Nepali, Jorn Henning Putschke, A. V. Brandin, H. Okada, S. E. Vigdor, Christian Claude Kuhn, H. Zhang, I. Sakrejda, J. X. Zuo, S. LaPointe, A. Gordon, P. Fachini, K. S.F.F. Guimaraes, Jana Bielcikova, P. Sorensen, X. H. Shi, Peter Graham Jones, L. Didenko, S. R. Klein, T. Tarnowsky, N. L. Subba, D. L. Olson, A. A. Derevschikov, and A. L. Trattner

Subjects
Nuclear reaction, Particle physics, Star, General Physics and Astronomy, 01 natural sciences, Anisotropic Flow, Nuclear physics, Au+Au and Cu+Cu collisions, 0103 physical sciences, Dependence, 010306 general physics, Nuclear Experiment, Physics, Energy, Time projection chamber, Nucleus-Nucleus Collisions, 010308 nuclear & particles physics, Elliptic flow, Collective Flow, Collision, Collaboration, Charged particle, NATURAL SCIENCES. Physics, PRIRODNE ZNANOSTI. Fizika, Elliptic Flow, Pseudorapidity, Time Projection Chamber, Transverse momentum, Quark-Gluon Plasma, High Energy Physics::Experiment, Relativistic Heavy Ion Collider
Abstract

We measure directed flow (v_{1}) for charged particles in Au+Au and Cu+Cu collisions at sqrt[s_{NN}]=200 and 62.4 GeV, as a function of pseudorapidity (eta), transverse momentum (p_{t}), and collision centrality, based on data from the STAR experiment. We find that the directed flow depends on the incident energy but, contrary to all available model implementations, not on the size of the colliding system at a given centrality. We extend the validity of the limiting fragmentation concept to v_{1} in different collision systems, and investigate possible explanations for the observed sign change in v_{1}(p_{t}).

Published
2008

258. Minimum Cuts for Circular-Arc Graphs

Author

Y. F. Wu, D. T. Lee, and Majid Sarrafzadeh

Subjects
General Computer Science, Computational complexity theory, General Mathematics, Graph theory, law.invention, Combinatorics, Unit circle, Minimum cut, law, Algorithmics, Independent set, Time complexity, Circle graph, Computer Science::Databases, MathematicsofComputing_DISCRETEMATHEMATICS, Mathematics
Abstract

The problem of finding a minimum cut of n arcs on a unit circle is considered. It is shown that this problem can be solved in $\Theta (n \log n)$ time, which is optimal to within a constant factor. If the endpoints of the arcs are sorted, the problem can be solved in linear time. The solution to the minimum cut problem can be used to solve a minimum new facility problem in competitive location and a minimum partition set problem for the intersection model of a circle graph. As a by-product it is also shown that the maximum independent set of n arcs can be obtained in linear time, assuming the endpoints are sorted, which is much simpler than the most recent result of Masuda and Nakajima [SIAMI. Comput., 17 (1988), pp. 41–52].

Published
1990

259. Liver progenitor cells activated after 30% small-for-size liver transplantation in rats: a preliminary study

Author

Sheng Fang, Yu-Dong Qiu, Y.-F. Wu, Liang Mao, Hong Liu, and Yitao Ding

Subjects
medicine.medical_specialty, Pathology, genetic structures, medicine.medical_treatment, Liver transplantation, Gastroenterology, Internal medicine, medicine, Animals, Hepatectomy, Progenitor cell, Survival rate, Liver injury, Transplantation, biology, business.industry, Stem Cells, Graft Survival, medicine.disease, Proliferating cell nuclear antigen, Liver Transplantation, Rats, Liver, Models, Animal, biology.protein, Hepatocytes, Immunohistochemistry, Surgery, Stem cell, business
Abstract

Aim To explore whether liver progenitor cells were activated after 30% small-for-size liver transplantation in rats. Methods 200 rats were arranged in three groups: 70% partial hepatectomy (PH), whole liver transplantation (WLT), and 30% liver transplantation (SLT) group. On days 1, 2, 3, 5, 7 after operation, 6 rats were sacrificed in each group at each time. One week survivals were analyzed; while liver injury and regeneration index were estimated by serum ALT AST, H&E staining and proliferating cell nuclear antigen index. The oval cell markers, including CD90 and OV6, were detected in liver sections by immunohistochemistry. Results The 50% survival rate of the SLT group was significantly lower than those of the PH and the WLT groups. At each time after operation, the serum ALT and AST were much higher in the SLT group. Compared with the PH group on days 1, 2, and 3 postoperatively, the PCNA indices were lower among the SLT group. OV-6 positive and CD90 positive cells were detected in the SLT group from day 2 postoperatively. These progenitor cells were first dispersed in the liver but restricted to the periportal region over the following days. Conclusion Liver progenitor cell activation after SLT may be related to the liver dysfunction caused by a small-for-size graft.

Published
2007

260. Partonic Flow andϕ-Meson Production inAu+AuCollisions atsNN=200 GeV

Author

T. Kollegger, A. I. Pavlinov, F. Liu, R. S. Longacre, M. Calderon De La Barca Sanchez, C-Q. Li, Sukalyan Chattopadhyay, R. P. Scharenberg, Christina Markert, P. Seyboth, A. Wetzler, H. S. Matis, M. S. Ganti, T. J. Hallman, F. Laue, R. D. Majka, J. Speltz, J. L. Drachenberg, J. Sowinski, Raghunath Sahoo, W. W. Jacobs, B. I. Abelev, O. Catu, M. DePhillips, Y. P. Lu, V. Perevoztchikov, Lee Stuart Barnby, Sunil Dogra, E. W. Hughes, Michal Sumbera, A. A. P. Suaide, J. Schambach, K. L. Kowalik, A. Bellingeri-Laurikainen, G. Igo, J. Lauret, T. W. Henry, V. Ghazikhanian, R. Witt, Y. Bai, S. Mioduszewski, W. J. Llope, Guo-Liang Ma, M. Oldenburg, Jaroslav Bielcik, R. Lednicky, Anthony Robert Timmins, S. W. Wissink, Y. Zhang, Nikola Poljak, V. Yu Khodyrev, A. Kocoloski, Q. Li, Adam Ryszard Kisiel, Marek Bombara, Z. P. Zhang, Jana Bielcikova, L. Kotchenda, J. E. Draper, M. Heinz, B. Haag, T. S. McShane, A. S. Hirsch, P. M. Jacobs, H. J. Crawford, P. Kravtsov, B. K. Srivastava, J. Bouchet, I. M. Vasilevski, Bedangadas Mohanty, A. N. Zubarev, Jie Liu, J. Engelage, S. Baumgart, R. Fatemi, S. Bhardwaj, Boris Hippolyte, S. U. Chung, W. Christie, A. I. Kulikov, J. Millane, Mirko Planinic, Y. Fisyak, J. L. Romero, M. Bystersky, B. Grube, M. R. Dutta Mazumdar, O. V. Rogachevskiy, W. M. Zhang, Andrey Vasiliev, P. Fachini, K. S.F.F. Guimaraes, S. Lehocka, Premomoy Ghosh, J. M. Landgraf, Y. Li, S. M. Guertin, P. S. Sazhin, E. Finch, Y. Zhao, D. P. Mahapatra, R. S. Hollis, L. K. Mangotra, W. A. Love, R. Manweiler, Y. G. Gorbunov, J. Callner, A. Feng, Jay Roberts, Janet Elizabeth Seger, A. M. Hoffman, M. Strikhanov, I. A. Qattan, Z. Chajecki, D. D. Koetke, B. V. K. S. Potukuchi, V. B. Dunin, V. V. Belaga, M. Cherney, Thomas Michael Cormier, S. Kabana, Y. P. Viyogi, J. Fedorisin, E. G. Judd, Anju Bhasin, A. Shabetai, G. Wang, Q. H. Xu, K. Kang, A. Stadnik, S. L. Blyth, F. Jia, D. J. Hofman, C. A. Whitten, W. He, E. M. Kislov, C. Perkins, J. G. Cramer, A. Szanto de Toledo, A. Lebedev, M. M. de Moura, L. Ruan, Peter Graham Jones, V. Fine, A. Kechechyan, Andre Mischke, G. Odyniec, J. Sandweiss, J. Kapitan, Z. J. Sun, Madan M. Aggarwal, Y. Panebratsev, K. Krueger, Fuqiang Wang, J. Putschke, J. W. Watson, M. Botje, R. N. Singaraju, T. Peitzmann, J. Takahashi, A. P. Meschanin, T. Pawlak, M. A. C. Lamont, D. Grosnick, X. Lin, M. Sarsour, S. B. Nurushev, A. Ogawa, H. F. Chen, Thomas A. Trainor, W. R. Edwards, L. Didenko, M. J. Horner, Russell Richard Betts, A. Rose, N. Schmitz, Jake Y. Chen, E. Shahaliev, D. G. Underwood, G. Lin, V. Kouchpil, Manish Sharma, Edmundo Javier Garcia-Solis, V. I. Yurevich, S. Lange, M. Kopytine, J. Fu, W. L. Zhan, Tai Sakuma, J. Cheng, T. J. M. Symons, J. C. Dunlop, N. T. Porile, R. V. Cadman, M. Tokarev, S. R. Klein, T. Tarnowsky, N. L. Subba, A. M. Vander Molen, Frank Simon, E. Hjort, Y. F. Wu, Qian Yue, Jianhong Wu, O. Barannikova, S. J. Lindenbaum, D. L. Olson, Beomkyu Kim, R. Varma, Vitaly Okorokov, Zubayer Ahammed, M. J. LeVine, Yu A. Matulenko, N. Xu, S. Timoshenko, P. Filip, B. Stringfellow, A. A. Derevschikov, T. D. S. Stanislaus, Bernd Surrow, Debasish Das, A. G. Knospe, L. C. Bland, H. H. Wieman, G. D. Westfall, W. T. Waggoner, Morton Kaplan, Pawan Kumar Netrakanti, X. Z. Cai, J. W. Harris, C. A. Gagliardi, O. G. Grebenyuk, N. van der Kolk, M. Pachr, Petr Jákl, X. M. Sun, P. Sorensen, Z. Z. Xu, M. Shao, G. Van Buren, P. Yepes, V. Eckardt, Renaud Vernet, A. H. Tang, T. W. Ludlam, J. M. Nelson, Nikita Smirnov, Y. G. Ma, W. Peryt, N. G. Minaev, V. Emelianov, A. K. Bhati, D. Keane, R. Stock, L. G. Efimov, C-H. Lee, T. K. Nayak, B. E. Bonner, O. D. Tsai, W. Q. Shen, Sevil Salur, F. Du, Basanta Kumar Nandi, Camelia Mironov, Thomas Dietel, A. M. Poskanzer, T. P. Burton, C. Roy, L. V. Nogach, H. Gos, P. Chaloupka, S. Trentalange, V. I. Kravtsov, L. Liu, I-K. Yoo, M. C. Suarez, P. Kurnadi, M. R. Cosentino, F. Benedosso, M. S. Daugherity, T. G. Dedovich, R.J.M. Snellings, S. C. Phatak, A. Kumar, X. L. Wang, H. Liu, A. Chikanian, S. Margetis, J. Ulery, H. Zhang, H. G. Ritter, M. van Leeuwen, X. Dong, I. Sakrejda, S. K. Pal, T. J. Humanic, D. Arkhipkin, A. Hamed, L. Gaillard, A. Bravar, J. X. Zuo, A. Iordanova, E. P. Sichtermann, M. L. Miller, J. Balewski, Rashmi Raniwala, Claude Andre Pruneau, Sadhana Dash, S. LaPointe, T. Ullrich, R. Zoulkarneev, A. A. Kuznetsov, J. S. Wang, E. Potrebenikova, D. Staszak, T. Ljubicic, H. Caines, Sudhir Raniwala, S. S. Shimanskiy, D. Relyea, C. Nepali, A. V. Brandin, J. W. Mitchell, S. E. Vigdor, Christian Claude Kuhn, P. Djawotho, Sergey Voloshin, Y. Wang, J. Baudot, Marcelo Gameiro Munhoz, D. J. Prindle, M. A. Lisa, B. Erazmus, Neeraj Gupta, D. Cebra, M. Estienne, Yu Melnick, H. Bichsel, Y. Zoulkarneeva, C. Zhong, B. D. Anderson, M. Potekhin, J. H. Thomas, David Lynn, M. J. Russcher, J. C. Webb, G. Eppley, J. Pluta, J. G. Ma, Jing Zhou, Rene Bellwied, R. E. Tribble, Gerald W Hoffmann, D. Kettler, G. S. Averichev, H. M. Spinka, H. Z. Huang, S. Vokal, J. Kiryluk, J. H. Chen, Rajarshi Ray, D. A. Morozov, A. Ridiger, Christine Nattrass, S. Heppelmann, L. Martin, C. J. McClain, Ilya Selyuzhenkov, and J. P. Coffin

Subjects
Physics, Particle physics, Meson production, Flow (mathematics), 010308 nuclear & particles physics, 0103 physical sciences, General Physics and Astronomy, 010306 general physics, 01 natural sciences
Published
2007

261. Transverse Momentum and Centrality Dependence of High-pTNonphotonic Electron Suppression inAu+AuCollisions atsNN=200 GeV

Author

S. U. Chung, T. P. Burton, Marcelo Gameiro Munhoz, D. J. Prindle, V. Fine, P. Djawotho, N. Xu, P. Filip, Jake Y. Chen, V. Ghazikhanian, D. Magestro, B. Haag, M. D.S. De La Barca, M. A. Lisa, G. D. Westfall, Marek Bombara, L. Kotchenda, J. L. Romero, I. A. Qattan, Z. Chajecki, Petr Jákl, C. Perkins, T. Peitzmann, H. M. Spinka, F. Laue, A. Szanto de Toledo, J. Kapitan, Z. Xu, G. Lin, T. S. McShane, P. S. Sazhin, R. V. Cadman, E. Finch, Jianhong Wu, R. L. Ray, P. Kurnadi, W. T. Waggoner, J. L. Drachenberg, S. M. Dogra, Madan M. Aggarwal, Fuqiang Wang, E. Potrebenikova, Zhenyu Zhang, T. Pawlak, J. Engelage, M. R. Cosentino, H. Bichsel, G. Odyniec, M. Oldenburg, D. Staszak, Y. Zoulkarneeva, S. Baumgart, F. Benedosso, X. Lin, N. Gupta, A. Feng, M. Potekhin, H. Z. Huang, S. Vokal, Jay Roberts, Premomoy Ghosh, J. M. Landgraf, N. S. Nepali, T. G. Dedovich, H. Zhang, T. Ljubicic, T. Sakuma, David Lynn, S. C. Phatak, Sergey Voloshin, Christine Nattrass, M. J. Russcher, V. I. Yurevich, S. M. Guertin, Alexandre Alarcon Do Passo Suaide, H. Caines, Sudhir Raniwala, B. V.K.S. Potukuchi, Yu-Gang Ma, M. Strikhanov, W. L. Zhan, Frank Simon, N. Schmitz, D. P. Mahapatra, R. S. Hollis, E. Shahaliev, S. S. Shimanskiy, S. Kabana, Y. P. Viyogi, N. G. Minaev, S. L. Blyth, D. Relyea, I. Sakrejda, J. C. Dunlop, M. Kopytine, J. Fu, M. Tokarev, M. Heinz, Lee Stuart Barnby, J. Baudot, J. Sandweiss, A. M. Vander Molen, A. Kumar, F. Du, O. G. Grebenyuk, V. B. Dunin, E. P. Sichtermann, Zubayer Ahammed, T. J. Humanic, J. Fedorisin, M. J. LeVine, Jaroslav Bielcik, J. G. Ma, Jing Zhou, W. J. Llope, L. V. Nogach, J. X. Zuo, J. H. Thomas, David Jonathan Hofman, E. Hjort, Y. F. Wu, A. G. Knospe, V. I. Kravtsov, T. D. S. Stanislaus, H. H. Wieman, J. Balewski, N. T. Porile, Rashmi Raniwala, A. N. Zubarev, M. R. Dutta Mazumdar, Russell Richard Betts, L. Ruan, Claude Andre Pruneau, Qian Yue, B. Erazmus, Adam Ryszard Kisiel, Beomkyu Kim, D. Kettler, D. G. Underwood, O. V. Rogachevskiy, C. A. Whitten, L. K. Mangotra, R. Manweiler, H. J. Crawford, K. Kang, P. Fachini, R. Varma, S. LaPointe, Yu A. Matulenko, G. S. Averichev, J. W. Harris, R. Fatemi, J. Kiryluk, R. Witt, A. M. Poskanzer, M. J. Horner, A. Stadnik, T. Ullrich, D. Cebra, A. Kechechyan, Andre Mischke, W. A. Love, K. S.F.F. Guimaraes, S. Mioduszewski, S. Lange, Jana Bielcikova, B. Stringfellow, S. Trentalange, S. J. Lindenbaum, K. Krueger, R. Zoulkarneev, M. Estienne, V. Yu Khodyrev, Anthony R. Timmins, Yu Melnick, M. Shao, B. K. Srivastava, I. M. Vasilevski, T. J. Hallman, E. M. Kislov, J. Cheng, T. J. M. Symons, W. He, D. A. Morozov, Bernd Surrow, P. Yepes, V. Eckardt, S. Bhardwaj, J. G. Cramer, Boris Hippolyte, M. Cherney, Peter Martin Jacobs, Thomas Michael Cormier, V. V. Belaga, Renaud Vernet, A. H. Tang, Pawan Kumar Netrakanti, M. Sarsour, F. Jia, J. S. Wang, X. L. Wang, A. Ridiger, P. Sorensen, Thorsten Sven Kollegger, C. Zhong, Peter Graham Jones, Jie Liu, C. A. Gagliardi, N. van der Kolk, L. Didenko, S. Heppelmann, M. van Leeuwen, X. Dong, L. Martin, S. K. Pal, S. R. Klein, T. Tarnowsky, N. L. Subba, D. D. Koetke, J. E. Draper, C. J. McClain, D. L. Olson, A. Bravar, S. B. Nurushev, A. A. Derevschikov, J. P. Coffin, I. Selyuzhenkov, G. Van Buren, Jorn Henning Putschke, T. W. Ludlam, A. V. Brandin, J. M. Nelson, Yan Li, W. Peryt, O. Catu, S. E. Vigdor, Christian Claude Kuhn, Bedangadas Mohanty, J. H. Chen, M. Bystersky, I. K. Yoo, Y. G. Gorbunov, Alexandre Shabetai, Morton Kaplan, X. Z. Cai, A. Kocoloski, Q. Li, E. G. Judd, H. Liu, A. Chikanian, J. Speltz, M. DePhillips, S. Dash, Michal Sumbera, D. Arkhipkin, A. Hamed, Y. Bai, A. Iordanova, S. W. Wissink, Y. Zhang, Basanta Kumar Nandi, Nikola Poljak, J. Callner, Wen-Qing Shen, V. A. Okorokov, C. Roy, H. Gos, P. Chaloupka, Sukalyan Chattopadhyay, M. S. Ganti, Y. P. Lu, V. Perevoztchikov, E. W. Hughes, K. L. Kowalik, Guo-Liang Ma, G. Eppley, J. Pluta, A. S. Hirsch, J. C. Webb, P. Kravtsov, M. Pachr, R. E. Tribble, Gerald W Hoffmann, Raimond Snellings, Xiangming Sun, B. D. Anderson, A. I. Pavlinov, F. Liu, R. D. Majka, S. Margetis, J. Schambach, W. Christie, J. Sowinski, A. I. Kulikov, W. M. Zhang, Andrey Vasiliev, Janet Elizabeth Seger, A. M. Hoffman, L. C. Bland, Anju Bhasin, A. A. Kuznetsov, L. Liu, M. L. Miller, A. Lebedev, M. C. Suarez, M. M. de Moura, M. Botje, A. Wetzler, R. N. Singaraju, A. P. Meschanin, C-Q. Li, J. Ulery, H. G. Ritter, R. P. Scharenberg, Christina Markert, O. Barannikova, R. Bellwied, L. Gaillard, H. S. Matis, Manish Sharma, M. S. Daugherity, R. S. Longacre, W. W. Jacobs, C. Mironov, Y. Fisyak, J. Lauret, Debasish Das, Raghunath Sahoo, M. A.C. Lamont, A. Bellingeri-Laurikainen, G. Igo, J. Bouchet, J. Millane, R. Lednicky, S. Lehocka, Andrew Rose, Y. Zhao, G. Wang, P. Seyboth, T. Dietel, Mirko Planinic, B. I. Abelev, T. W. Henry, Sergey Timoshenko, Q. H. Xu, Z. J. Sun, J. Takahashi, J. W. Watson, A. Ogawa, H. F. Chen, Thomas A. Trainor, W. R. Edwards, Y. Panebratsev, D. Grosnick, V. Kouchpil, E. Garcia-Solis, V. Emelianov, A. K. Bhati, D. Keane, Nikolai Smirnov, R. Stock, J. Mitchell, L. G. Efimov, C-H. Lee, T. K. Nayak, B. E. Bonner, O. D. Tsai, Sevil Salur, and Y. Wang

Subjects
Nuclear reaction, Physics, Semileptonic decay, Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Hadron, General Physics and Astronomy, Elementary particle, Electron, 01 natural sciences, law.invention, Nuclear physics, law, 0103 physical sciences, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics, Collider, Lepton
Abstract

The STAR collaboration at the BNL Relativistic Heavy-Ion Collider (RHIC) reports measurements of the inclusive yield of nonphotonic electrons, which arise dominantly from semileptonic decays of heavy flavor mesons, over a broad range of transverse momenta (1.2

Published
2007

262. SiC and GaN Wide Bandgap Device Technology Overview

Author

W.L. Pribble, Scott T. Sheppard, StG. Muller, Y.-F. Wu, J.W. Milligan, and John W. Palmour

Subjects
Materials science, Reliability (semiconductor), Ultra high frequency, business.industry, Wide-bandgap semiconductor, Optoelectronics, MESFET, business, Sheet resistance, Die (integrated circuit), Monolithic microwave integrated circuit, Micropipe
Abstract

Wide bandgap (WBG) devices offer significant advantages for next generation military and commercial systems. SiC MESFETs currently achieve power densities of 4.0 W/mm with power added efficiencies in excess of 60% on a repeatable basis. They are commercially available in packaged or die formats and have been successfully designed into a number of systems. GaN is also extremely promising as a next generation wide bandgap device. Cree has demonstrated power densities higher than 25 watts per mm of gate periphery. With ftau's > 40 GHz, GaN devices have the capability of satisfying system device requirements from UHF through millimeter-wave. Both technologies are now also offered through commercial MMIC foundry services using design rules and non-linear models provided for external designers. Significant progress has also been made in the development of 100-mm SiC substrates and WBG epitaxy (SiC and GaN) which is key for commercializing the technology and providing low costs. Micropipe densities as low as 2.5 cm-2 have been demonstrated for 100-mm HPSI substrates and both SiC and GaN epitaxy with excellent intra-wafer sheet resistance uniformity have been demonstrated. With robust reliability for SiC MESFETs now established for several years, the latest results for GaN device reliability benchmarking are shown.

Published
2007

263. Improved Superconducting Properties in Bulk MgB2 Prepared by High Energy Milling of Mg and B Powder

Author

Soo Kien Chen, Ping Xiang Zhang, Yexin Feng, G. Yan, Cheng Shan Li, H. L. Xu, Ya Feng Lu, H. P. Tang, Jinshan Li, and Y. F. Wu

Subjects
Diffraction, Superconductivity, High energy, Materials science, Condensed matter physics, Magnetometer, Scanning electron microscope, Condensed Matter - Superconductivity, Metals and Alloys, FOS: Physical sciences, Condensed Matter Physics, Microstructure, law.invention, SQUID, Superconductivity (cond-mat.supr-con), Magnetization, law, Condensed Matter::Superconductivity, Materials Chemistry, Ceramics and Composites, Electrical and Electronic Engineering
Abstract

The MgB2 bulks were prepared by high energy milling of Mg and B powder. The correlations among milling times, microstructure and superconducting properties were investigated in MgB2 bulks. Samples were characterized by x-ray diffraction (XRD), energy dispersive spectrometry (EDX) and scanning electron microscope (SEM), and the magnetization properties were examined by a Superconducting quantum interfere device (SQUID) magnetometer. It showed that the high energy milling is an effective approach to get fine crystalline (40-100nm) bulk MgB2 with good grain connectivity and high Jc performance. The critical current density reaches to 2.0X10E6A/cm2 at 15K and 0.59T, 5.7X10E5A/cm2 at 2T and 3.0X10E4A/cm2 at 5T., 12 pages, 6 figures

Published
2006

264. Three-dimensional Data Capture and Processing

Author

Y. F. Wu, Y.F. Zhang, Wei Feng, and Yoke San Wong

Subjects
medicine.diagnostic_test, business.industry, Computer science, Three dimensional data, medicine, Magnetic resonance imaging, Ultrasonic sensor, Computer vision, Artificial intelligence, business
Published
2006

265. Social support and life adjustment for teenagers with cleft lip and palate in Taiwan

Author

Y F, Wu, P H, Chao, L J, Lo, Y R, Chen, and M S, Noordhoff

Subjects
Cleft Palate, Male, Adolescent, Cleft Lip, Humans, Social Support, Female, Social Adjustment
Abstract

The teenage years (13-19 years) are a critical period for psychosocial development. Therefore, social support and life adjustment for teenagers with cleft lip/palate were chosen for investigation.The sample survey included 101 cleft patients randomly selected from the Chang Gung Craniofacial Center, and 101 non-cleft controls selected from local middle and high schools for comparison. Questionnaires were used to evaluate the social support and life adjustment scales. Items of social support were subdivided into social activities, social service, and psychological support. Items of life adjustment were subdivided into social, psychological, and physical adjustments.The coefficients of alpha reliability were high at 0.9294 for social support, and 0.9389 for life adjustment. The results show that personal factors, family factors, and treatment status do not influence social support or life adjustment in either group; however, gender does. In the control group, non-cleft males had better social support and life adjustment than did females. Such a difference was not observed in the cleft group. Both groups received the same social support. The cleft teenagers have a significantly lower level of life adjustment. The association between the social support and life adjustment is high in both groups.The cleft group has a lower level of life adjustment. There is a positive relationship between social support and life adjustment. More social support is required for the cleft group in order to improve their level of life adjustment.

Published
2005

266. Use of asymmetric somatic hybridization for transfer of the bacterial blight resistance trait from Oryza meyeriana L. to O. sativa L. ssp. japonica

Author

Y.-Z. Zhao, Ping Wu, Y.-F. Wu, C.-Q. Yan, Xueqin Zhang, J. Huang, W.-G. Huangfu, Gang-Ping Xue, Z.-Y. Xue, G.-Z. Xu, K.-X. Qian, and Qiusheng Yan

Subjects
Oryza sativa, Resistance (ecology), Somatic cell, Protoplasts, fungi, food and beverages, Oryza, Plant Science, General Medicine, Biology, biology.organism_classification, Plants, Genetically Modified, Japonica, Immunity, Innate, Botany, Genotype, Trait, Hybridization, Genetic, Regeneration, Cultivar, Agronomy and Crop Science, Crosses, Genetic, Hybrid, Plant Diseases
Abstract

Bacterial blight is one of the major diseases affecting rice productivity. To improve the resistance of cultivated rice to bacterial blight, we introduced a bacterial blight resistance trait from Oryza meyeriana, a wild rice species, into an elite japonica rice cultivar (Dalixiang) using asymmetric somatic hybridization. One hundred and thirty-two independent lines were regenerated. The hybrid plants possessed several morphological features of the donor species, O. meyeriana. Random amplified polymorphic DNA analysis revealed that hybrid plants exhibited banding patterns derived from their parental genotypes. For the majority of the hybrids, resistance to bacterial blight pathogens was intermediate to that observed for O. meyeriana and O. sativa (cv. Dalixiang). Four of the hybrid lines exhibited a high bacterial blight resistance, but it was less than that observed for O. meyeriana. These results demonstrate that O. meyeriana can be used as a good genetic source for improving bacterial blight resistance in commercial rice cultivars through asymmetric somatic hybridization.

Published
2003

267. [Clinical efficacy of burning mouth syndrome treated by livial]

Author

J Y, Peng, Y F, Wu, and W N, Han

Subjects
Adult, Male, Postmenopause, Estrogen Receptor Modulators, Norpregnenes, Humans, Female, Burning Mouth Syndrome, Middle Aged
Abstract

To observe the clinical efficacy of livial on postmenopause women with burning mouth syndrome.Fifty six postmenopause women with burning mouth syndrome were randomly divided into two groups, 26 patients were treated with livial as the treatment group, 30 patients were treated with oryzanol and vitamin E as the control. To evaluate the effect, all the patients were observed in 3-6 months after therapy.The result showed that the total effective rate of the treatment group was 84.62% after 3 months, 88.46% after 6 months, and significantly higher than that in the control(P0.005).It is indicated that livial is safer and more effective than nylestriol in treatment with burning mouth syndrome.

Published
2003

268. 14-W GaN-based microwave power amplifiers

Author

Umesh K. Mishra, Bernd Keller, D. Wapolnek, J. P. Ibbetson, Primit Parikh, and Y.-F. Wu

Subjects
Materials science, business.industry, Microwave power amplifiers, Amplifier, Bandwidth (signal processing), Wide-bandgap semiconductor, Gallium nitride, Hardware_PERFORMANCEANDRELIABILITY, Active devices, Power level, chemistry.chemical_compound, chemistry, Hardware_INTEGRATEDCIRCUITS, Optoelectronics, business, Electronic circuit
Abstract

High-power GaN-based flip-chip ICs are demonstrated using AlGaN/GaN High-Electron-Mobility-Transistors (HEMTs) as the active devices and AlN as the circuit substrates. The circuits achieved 6-10 GHz bandwidth, 9 dB linear gain and 14.1-W output power. This power level is the highest for a GaN-based amplifier to date, and is a factor of 4-7 higher than conventional GaAs-HEMT-based amplifiers using the same size of output devices.

Published
2002

269. Finite-size behavior near the critical point of QCD phase-transition

Author

Yun-Yun Chen, Y. F. Wu, and Li-Zhu Chen

Subjects
Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Phase transition, Critical point (thermodynamics), Quantum electrodynamics, Detector, Astronomy and Astrophysics, Observable, Fixed point, Instrumentation, Scaling, Quantum
Abstract

It is pointed out that the finite-size effect is not negligible in locating the critical point of quantum colordynamics (QCD) phase transitions at current relativistic heavy ion collisions. The finite-size scaling form of the critical related observable is suggested. Its fixed point behavior at critical incident energy can be served as a reliable identification of a critical point and nearby boundary of QCD phase transition. How to experimentally find the fixed point behavior is demonstrated by using 3D-Ising model as an example. The validity of the method at finite detector acceptances at RHIC is also discussed.

Published
2014

270. Structure of the atmosphere in the vicinity of VHF radar echoes in the mesosphere

Author

Y.-F. Wu and H. U. Widdel

Subjects
Atmospheric Science, Radar tracker, Richardson number, Meteorology, Turbulence, Aeronomy, Aerospace Engineering, Astronomy and Astrophysics, law.invention, Mesosphere, Atmosphere, Geophysics, Space and Planetary Science, law, Wind shear, General Earth and Planetary Sciences, Radar, Geology
Abstract

A series of five consecutive foil chaff experiments launched in summer 1987 at Andenes (69°N) was investigated in respect to variance of vertical air velocity w, Richardson number Ri and horizontal wind shear. Peaks in variance were seen at certain heights correspond to heights at which the Richardson number is smaller than 0.25 and where the wind shear is larger than about 50/m/s/km. For heights below about 85 km a 1:1 correspondence between MST radar echoes and these turbulent layers were found. This was not the case for heights greater than 86–87 km, and the MST radar echoes were transient in time. Two interpretations of this observation are possible: Frozen turbulence drifting in the wind or transient turbulence generated locally. At present we see no way to decide which interpretation is valid.

Published
1992

271. Cumulants in the 3-dimensional Ising, O (2) and O (4) spin models

Author

Y. F. Wu, X. L. Chen, Li-Zhu Chen, and Xue Pan

Subjects
High Energy Physics - Theory, Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Phase transition, Statistical Mechanics (cond-mat.stat-mech), Critical phenomena, FOS: Physical sciences, Astronomy and Astrophysics, Universality (dynamical systems), High Energy Physics - Theory (hep-th), Critical point (thermodynamics), Spin model, Ising model, Statistical physics, Instrumentation, Cumulant, Condensed Matter - Statistical Mechanics
Abstract

Based on the universal properties of a critical point in different systems and that the QCD phase transitions fall into the same universality classes as the 3-dimensional Ising, $O(2)$ or $O(4)$ spin models, the critical behavior of cumulants and higher cumulant ratios of the order parameter from the three kinds of spin models is studied. We found that all higher cumulant ratios change dramatically the sign near the critical temperature. The qualitative critical behavior of the same order cumulant ratio is consistent in these three models., 5 pages, 5 figures

Published
2013

273. Thermal Performance Evaluation of VBGA Packages

Author

Wen C. Zheng, Paul Y. F. Wu, and James J. D. Lan

Abstract

Photo-imageable-dielectric (PID) materials and the Micro-filled Via (MfVia) technology are utilized to make the ViperBGA (VBGA), a thermally enhanced BGA package substrate. The thermal performance of the VBGA packages was evaluated by wind tunnel tests of JEDEC standard and FEM simulations. It is shown that the thermal resistance Θja of any given package can be approximated by a rational function of the power level and the airflow speed. One advantage of such expression is that the thermal resistance of the package under any condition can be confidently predicted, and the other is that more reliable numerical predictions can be achieved. This paper also describes how to approach a confident FEM modeling of the wind tunnel tests in terms of heat transfer coefficients and other factors.

Published
1997

274. Neighboring azimuthal bin-bin multiplicity correlation as a direct measure for the shear viscosity in relativistic heavy ion collisions

Author

Lin Li, Meijuan Wang, and Y. F. Wu

Subjects
Physics, Scattering cross-section, Nuclear and High Energy Physics, Shear viscosity, Astronomy and Astrophysics, Molecular physics, Bin, Direct measure, Physics::Fluid Dynamics, Azimuth, Heavy ion, Multiplicity (chemistry), Atomic physics, Instrumentation
Abstract

Neighboring azimuthal bin-bin multiplicity correlation is suggested to be a good measure for internal layer-to-layer interactions of the formed matter in relativistic heavy ion collisions. It is shown to be directly related to the shear viscosity of the formed matter. As an application of this method, the shear viscosity in the samples generated by a multi-phase transport model (AMPT) is estimated. The results are in qualitative agreement with the theoretical calculation from microscopic interactions, i.e., the larger the scattering cross section, the smaller the shear viscosity.

Published
2013

275. Eccentricity and elliptic flow at a fixed centrality in Au+Au collisions at in an AMPT model

Author

Y. F. Wu, Mei-Juan Wang, and Gang Chen

Subjects
Physics, Nuclear and High Energy Physics, media_common.quotation_subject, Mathematical analysis, Elliptic flow, Astronomy and Astrophysics, Space (mathematics), AMPT, Classical mechanics, medicine, Impact parameter, Eccentricity (behavior), Nuclear Experiment, Centrality, Saturation (chemistry), Anisotropy, Instrumentation, medicine.drug, media_common
Abstract

In this paper, elliptic flow is studied at a fixed centrality in Au+Au collisions at in the AMPT model. It is observed that as the participants increase, elliptic flow either increases or decreases at a different fixed impact parameter, but it does not have a trivial fluctuation. It is analyzed that the initial space anisotropy dominates the participant dependence of elliptic flow in near-central collisions(b = 5 fm) and mid-central collisions(b = 8 fm), while the interaction between particles can mainly answer for the elliptic flow behavior with the participant in peripheral collisions (b = 12 fm). To distinguish the pure geometrical effect, elliptic flow scaled by initial eccentricity is studied. It is found that the ratio ν2/ increases with the participant and reaches a saturation when the participant is large enough, indicating that the collision system may reach a local equilibrium.

Published
2013

276. Kaon Interferometry

Author

U. Heinz, B. Tomášik, U. A. Wiedemann, and Y. -F. Wu

Subjects
Nuclear Theory (nucl-th), Nuclear and High Energy Physics, Nuclear Theory, General Physics and Astronomy, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Two-kaon and two-pion correlation functions for an expanding thermalized source are compared. In the Yano-Koonin-Podgoretskii parametrization of the correlation function, the HBT radius parameters are shown to obey M_\bot- scaling in the absence of collective transverse flow. This scaling is broken by transverse flow. An accurate comparison of pion and kaon correlations can thus resolve issue whether the observed M_\bot-dependence of the transverse radius parameter is due to transverse collective flow or other transverse gradients. Effects from resonance decays are shortly discussed., Comment: 8 pages (incl. 1 Figure), to appear in the proceedings of the workshop "Strangeness 96", Budapest, 15.-17 May 1996, as a special issue of the journal Heavy Ion Physics

Published
1996
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278. Using a 1.2 GHz bandwidth reflective semiconductor optical amplifier with seeding light by 64-quadrature amplitude modulation orthogonal frequency division multiplexing modulation to achieve a <math display='inline' overflow='scroll'><mrow><mn mathvariant='bold'>10</mn><mtext>-</mtext><mi>gbits</mi><mo>/</mo><mi mathvariant='normal'>s</mi></mrow></math> upstream rate in long-reach passive optical network access

Author

Chi-Wai Chow, Chien-Hung Yeh, Hsing-Yu Chen, and Y. F. Wu

Subjects
Physics, Quadrature modulation, Analog transmission, business.industry, General Engineering, Optical modulation amplitude, Optical performance monitoring, Passive optical network, Atomic and Molecular Physics, and Optics, Amplitude modulation, Optics, Pulse-amplitude modulation, business, Quadrature amplitude modulation
Abstract

We use a commercially available 1.2 GHz bandwidth reflective semiconductor optical amplifier (RSOA)-based optical network unit (ONU) to achieve 10-gbits/s upstream traffic for an optical orthogonal frequency division multiplexing (OFDM) long-reach passive optical network (LR-PON). This is the first time the 64-quadrature amplitude modulation (QAM) OFDM format has been applied to RSOA-ONU to achieve a 75 km fiber transmission length. In the proposed LR-PON, the upstream power penalty of 5.2 dB at the bit error rate of 3.8×10−3 is measured by using a 64-QAM OFDM modulation after the 75 km fiber transmission without dispersion compensation.

Published
2012

279. 13 Gbit/s WDM-OFDM PON using RSOA-based colourless ONU with seeding light source in local exchange

Author

Chi-Wai Chow, J. Y. Sung, Yi-Hsin Lin, Y. F. Wu, Hsing-Yu Chen, Chien-Hung Yeh, Ci-Ling Pan, and Yang Liu

Subjects
Gigabit, Computer science, Orthogonal frequency-division multiplexing, Wavelength-division multiplexing, Bandwidth (signal processing), Bit error rate, Electronic engineering, Seeding, Forward error correction, Electrical and Electronic Engineering, Passive optical network
Abstract

Optical-carrier-distribution using reflective-semiconductor-optical-amplifier (RSOA)-based colorless optical-networking-unit (ONU) is a promising candidate for the wavelength-division-multiplexed passive-optical-network (WDM-PON). However, commercial available RSOA has a typical modulation-bandwidth of ∼1 GHz, which is not enough for the future bandwidth demand. Here we demonstrate a WDM-PON using 1 GHz bandwidth RSOA-based ONU, which can be operated up to 13 Gbit/s. Experimental results show that 20 km singlemode-fibre transmission of the 13 Gbit/s orthogonal-frequency-division-multiplexed (OFDM) signal can be achieved with bit-error rate lower than the forward error correction threshold.

Published
2011

280. [Echocardiographic study on the anatomy and blood flow pattern of ductus arteriosus in normal fetus]

Author

Y F, Wu

Subjects
Fetal Heart, Pregnancy, Regional Blood Flow, Humans, Female, Ductus Arteriosus, Blood Flow Velocity, Ultrasonography, Prenatal
Abstract

The anatomy and blood flow pattern of ductus arteriosus in fetus were studied by echocardiogram in 51 pregnant women. According to the duration of pregnancy, women were divided into 3 groups: group A (15-24 weeks) 15 cases; group B (25-34 weeks) 23 cases; and group C (35-41 weeks) 13 cases. The mean blood flow velocity in ductus arteriosus was 88.8 cm/sec in group A, 112.7 cm/sec in group B, and 130.4 cm/sec in group C (P0.0001), and they were significantly higher than that in aorta and pulmonary artery (P0.001). The characteristics of Doppler blood flow pattern was higher peak velocity in systolic and lower in diastolic. The ratio of diameter of right pulmonary artery to ductus arteriosus was 1:1. To recognize the characteristic blood flow pattern is a reliable sign to identify ductus arteriosus in fetus, and reference data of ductus arteriosus blood flow was presented.

Published
1993

281. 100 GHz ultra-wideband (UWB) fiber-to-the-antenna (FTTA) system for in-building and in-home networks

Author

Chi-Wai Chow, Chien-Hung Yeh, Jin-Wei Shi, F. M. Kuo, Yun-Jing Li, Ci-Ling Pan, Y. F. Wu, and Chi-Luen Wang

Subjects
Materials science, Optical fiber, business.industry, Transducers, Transmitter, Optical communication, Ultra-wideband, Signal Processing, Computer-Assisted, Equipment Design, Atomic and Molecular Physics, and Optics, law.invention, Equipment Failure Analysis, Computer Communication Networks, Optics, Mode-locking, law, Telecommunications, Fiber optic splitter, Antenna (radio), Photonics, Microwaves, business, Optical Fibers
Abstract

Fiber-to-the-antenna (FTTA) system can be a cost-effective technique for distributing high frequency signals from the head-end office to a number of remote antenna units via passive optical splitter and propagating through low-loss and low-cost optical fibers. Here, we experimentally demonstrate an optical ultra-wideband (UWB) - impulse radio (IR) FTTA system for in-building and in-home applications. The optical UWB-IR wireless link is operated in the W-band (75 GHz - 110 GHz) using our developed near-ballistic unitraveling-carrier photodiode based photonic transmitter (PT) and a 10 GHz mode-locked laser. 2.5 Gb/s UWB-IR FTTA systems with 1,024 high split-ratio and transmission over 300 m optical fiber are demonstrated using direct PT modulation.

Published
2010

284. Detection and Molecular Characterization of a ‘Candidatus Phytoplasma asteris’-Related Strain Infecting Sasa fortunei in China

Author

Y. F. Wu, H. Min, H. Zhang, C. P. Zhang, X. Q. Yu, and X. Zheng

Subjects
biology, food and beverages, Plant Science, biology.organism_classification, Aster yellows, Phyllostachys, Phytoplasma, GenBank, Sasa, Botany, Phyllostachys nigra, Restriction fragment length polymorphism, Agronomy and Crop Science, Ribosomal DNA
Abstract

Bamboos are ecologically and economically valuable plants. Young shoots of almost all species are edible, either raw or cooked, and are major components of Asian cuisine while culms are used for furniture or handicrafts as well as fuel wood. Symptoms indicative of phytoplasma disease were observed on Sasa fortunei (van Houtte) Fiori during a survey in Yangling, Shaanxi Province, China during 2007. Symptoms included internode shortening, a mosaic pattern on leaves of diminished size, stunted growth, and death of entire plants. Total nucleic acids were extracted from leaf veins of 10 diseased plants and 6 symptomless plants with a modified cetyltrimethylammoniumbromide (CTAB) method (1). Phytoplasma infection of plants was demonstrated by a nested PCR assay employing primer pair R16mF2/R16mR1 followed by R16F2n/R16R2 (2), which generated a 16S rDNA product of approximately 1.2 kb from all symptomatic plants only. Restriction fragment length polymorphism analysis by digestion of nested PCR products with restriction enzymes AluI and MseI indicated that S. fortunei plants contained group 16SrI (aster yellows), subgroup B phytoplasmas. Sequencing and phylogenetic analysis of phytoplasma 16S rDNA from S. fortunei (GenBank Accession No. FJ501958) revealed this strain to be very similar (99.7 and 99.6%, respectively) to phytoplasmas previously associated with Henon bamboo (Phyllostachys nigra) witches'-broom (GenBank Accession No. AB242433) (4) and sasa (S. borealis) witches'-broom (GenBank Accession No. AB293421) in Korea but less so (98.6%) to bamboo (Phyllostachys spp.) witches'-broom (GenBank Accession No. AY635145) disease in China (3). To our knowledge, this is the first report of a ‘Ca. Phytoplasma asteris’-related strain infecting S. fortunei in China. References: (1) E. Angelini et al. Vitis 40:79, 2001. (2) D. E. Gundersen and I.-M. Lee. Phytopathol. Mediterr. 35:144, 1996. (3) C. Hong et al. Plant Prot. 31:39, 2005. (4) H. Jung et al. J. Gen. Plant Pathol. 72:261, 2006.

Published
2009

285. A simple self-restored fiber Bragg grating (FBG)-based passive sensing ring network

Author

Sien Chi, Chia Husan Wang, Chi-Wai Chow, Y. F. Wu, Fu Yuan Shih, and Chien-Hung Yeh

Subjects
Computer science, business.industry, Applied Mathematics, Reliability (computer networking), Survivability, Ring network, Laser, law.invention, Optics, Fiber Bragg grating, Fiber optic sensor, law, Electronic engineering, business, Instrumentation, Engineering (miscellaneous), Wireless sensor network, Tunable laser
Abstract

In this investigation, we propose and experimentally investigate a simple self-restored fiber Bragg grating (FBG)-based sensor ring system. This proposed multi-ring passive sensing architecture does not require active components in the network. In this experiment, the network survivability and capacity for the multi-point sensor systems are also enhanced. Besides, the tunable laser source (TLS) is adopted in a central office (CO) for FBG sensing. The survivability of an eight-point FBG sensor is examined and analyzed. It is cost effective since the sensing system is entirely centralized in the CO. Experimental results show that the proposed system can enhance the reliability of the FBG sensing network for large-scale and multi-point architecture.

Published
2009

286. First Report of Syringa oblata and S. reticulata Leafroll Disease in China

Author

W. J. Wu, Z. N. Li, Y. F. Wu, H. Min, Y. Yan, and Z. Zhao

Subjects
Syringa oblata, Botany, Plant Science, Ornamental tree, Biology, China, Agronomy and Crop Science
Abstract

Syringa oblata is an important ornamental tree widely grown in China. In September of 2008, S. oblata plants exhibiting symptoms of leafroll and yellowing were found in a garden on the Northwest A&F University campus. Samples were collected from this site. Total DNA was extracted from 0.5 g of phloem tissue from leaf midribs and stems of each sample. DNA samples were analyzed with a nested PCR assay using phytoplasma 16S rDNA universal primers R16mF2/R16mR1 followed by specific primers R16F2n/R16R2 (1), which amplified a 1,452- and 1,246-bp product, respectively. We tested all 30 lilac samples, 20 of which had symptoms of leafroll and yellowing. These produced the expected 1,452- and 1,246-bp PCR products In contrast, the remaining 10 samples from symptomless trees yielded no PCR products. We also surveyed another lilac variety (Syringa reticulata), which is widely grown on the campus, and tested 50 samples with the above method. Again, 1.4- and 1.2-kb PCR products were amplified from all 30 trees displaying leafroll and yellowing symptoms, but not from the other 20 samples from symptomless trees. A comparative analysis of sequences derived from the two hosts showed that the phytoplasmas infecting them were most similar (>99%) to paulownia witches'-broom (PaWB) phytoplasma (GenBank Accession No. EF199937). Restriction fragment length polymorphism (RFLP) analysis of the nested 1.2-kb 16S rDNA products with endonucleases AluI and MseI indicated that all symptomatic plants were infected by the phytoplasmas belonging to aster yellow group (16SrI) subgroup D (16SrI-D) PaWB phytoplasma (2). 16S rDNA sequence comparisons and RFLP analysis of the cloned 16S rDNA from S. oblata (GenBank Accession No. FJ445224) and S. reticulate (GenBank Accession No. FJ445225) indicated that the phytoplasmas infecting them were nearly identical (99.8% identity). To our knowledge, this is the first report of the presence of the phytoplasma associated with a leafroll disease of S. oblata and S. reticulata in China. References: (1) D. E. Gundersen and I.-M. Lee. Phytopathol. Mediterr. 35:144, 1996. (2) I.-M. Lee et al. Int. J. Syst. Bacteriol. 48:1153, 1998.

Published
2009

287. Using multimode Fabry-Perot laser without external-injection for wavelength conversion

Author

Y. F. Wu, Chien-Hung Yeh, Chi-Wai Chow, F. Y. Shih, Chien-Jen Wang, and Sien Chi

Subjects
Physics, Multi-mode optical fiber, Laser diode, Physics::Instrumentation and Detectors, business.industry, Physics::Optics, Laser, Multiplexing, law.invention, Wavelength, Optics, law, Wavelength-division multiplexing, Electrical and Electronic Engineering, business, Fabry–Pérot interferometer, Diode
Abstract

Proposed and experimentally investigated is an all-optical wavelength converter using a multi-quantum-well multi-longitudinal-mode Fabry-Perot laser diode without any external probe beam or external built-in cavity. The input wavelength can be converted at 2.5 Gbit/s by the converter and the power penalty of 3.5 dB is observed at a bit error rate of 10−9. The proposed converter apparatus is simple and cost-effective for wavelength division multiplexing network applications.

Published
2009

288. Studies on heterologous expression of Rhizobium meliloti nifA gene and oxygen sensitivity of its product

Author

S P, Wang, J B, Zhu, G Q, Yu, Y F, Wu, and S J, Shen

Subjects
Oxygen, Bacterial Proteins, Genes, Bacterial, Nitrogen Fixation, Escherichia coli, Gene Expression Regulation, Bacterial, RNA, Messenger, Aerobiosis, Plasmids, Rhizobium
Abstract

When the R. meliloti (Rm) nifA'-lacZ fusion-carrying plasmids were introduced into the strains of Agrobacterium tumefaciens, R. trifolii and R. astragalus, beta-galactosidase activity was demonstrated. However, activity was not induced by microaerobiosis. Furthermore, R. meliloti nifA'-lacZ fusion was also not expressed in the nodule bacteroids of R. trifolii and R. astragalus. We speculate that some factor(s) important for the induction of Rm nifA presumed to be the fixLJ regulatory system would not be operative in these bacteria. Experiments using R. meliloti nifH'-lacZ/K. Pneumoniae nifH'-lacZ fusion and the constitutive Rm nifA system to test the nifA-dependent expression of nifH'-lacZ under aerobic and microaerobic conditions in E. coli were performed. The inhibition of the Rm nifA activation of nifH'-lacZ expression in the bacteria grown in the aerobic condition was shown. Assays on the Rm nifA-m RNA produced by the constitutive Rm nifA in E. coli under aerobic and microaerobic conditions with the cloned nifA as a probe for dot blot hybridization showed a marked decrease of Rm nifA mRNA when the bacteria were grown under aeration.

Published
1991

290. Use of asymmetric somatic hybridization for transfer of the bacterial blight resistance trait from Oryza meyeriana L. to O. sativa L. ssp. japonica.

Author

C.-Q. Yan, K.-X. Qian, Q.-S. Yan, X.-Q. Zhang, G.-P. Xue, W.-G. Huangfu, Y.-F. Wu, Y.-Z. Zhao, Z.-Y. Xue, J. Huang, G.-Z. Xu, and P. Wu

Subjects
SOMATIC hybrids, WILD rice, AGRICULTURAL productivity, PLANT morphology
Abstract

Bacterial blight is one of the major diseases affecting rice productivity. To improve the resistance of cultivated rice to bacterial blight, we introduced a bacterial blight resistance trait from Oryza meyeriana, a wild rice species, into an elite japonica rice cultivar (Dalixiang) using asymmetric somatic hybridization. One hundred and thirty-two independent lines were regenerated. The hybrid plants possessed several morphological features of the donor species, O. meyeriana. Random amplified polymorphic DNA analysis revealed that hybrid plants exhibited banding patterns derived from their parental genotypes. For the majority of the hybrids, resistance to bacterial blight pathogens was intermediate to that observed for O. meyeriana and O. sativa (cv. Dalixiang). Four of the hybrid lines exhibited a high bacterial blight resistance, but it was less than that observed for O. meyeriana. These results demonstrate that O. meyeriana can be used as a good genetic source for improving bacterial blight resistance in commercial rice cultivars through asymmetric somatic hybridization. [ABSTRACT FROM AUTHOR]

Published
2004

291. On Some Distance Problems in Fixed Orientations

Author

Y. F. Wu, C. K. Wong, and P. Widmayer

Subjects
Line segment, General Computer Science, General Mathematics, Polygon, Path (graph theory), Diagonal, Minimum spanning tree, Computational geometry, Topology, Voronoi diagram, Weighted Voronoi diagram, Mathematics
Abstract

In VLSI design, technology requirements often dictate the use of only two orthogonal orientations, determining both the shape of objects and the distance function, the $L_1 $-metric, to be used for wiring objects. More recent VLSI fabrication technology is capable of creating edges and wires in both the orthogonal and diagonal orientations.We generalize the distance concept to the case where any fixed set of orientations is allowed, and introduce a family of naturally induced metrics, and the subsequent generalization of geometrical concepts. A shortest connection between two points is in this case a path composed of line segments with only the given orientations. We derive optimal solutions for various basic planar distance problems in this setting, such as the computation of a Voronoi diagram, a minimum spanning tree, and the (minimum and maximum) distance between two convex polygons. Many other theoretically interesting and practically relevant problems remain to be solved. In particular, the new famil...

Published
1987

292. Rectilinear shortest paths in the presence of rectangular barriers

Author

Pedro J. de Rezende, Der-Tsai Lee, and Y. F. Wu

Subjects
Discrete mathematics, Disjoint sets, Upper and lower bounds, Longest path problem, Theoretical Computer Science, Combinatorics, Monotone polygon, Computational Theory and Mathematics, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Shortest path problem, Path (graph theory), Discrete Mathematics and Combinatorics, Point (geometry), Geometry and Topology, K shortest path routing, MathematicsofComputing_DISCRETEMATHEMATICS, Mathematics
Abstract

In this paper we address the following shortest-path problem. Given a point in the plane andn disjoint isothetic rectangles (barriers), we want to construct a shortestL1 path (not crossing any of the barriers) from the source point to any given query point. A restricted version of this problem (where the source and destination points are knowna priori) had been solved earlier inO(n2) time. Our approach consists of preprocessing the source point and the barriers to obtain a planar subdivision where a query point can be located and a shortest path connecting it to the source point quickly transvered. By showing that any such path is monotone in at least one ofx ory directions, we are able to apply a plane sweep technique to divide the plane intoO(n) rectangular regions. This leads to an algorithm whose complexity isO(n logn) preprocessing time,O(n) space, andO(logn+k) query time, wherek is the number of turns on the reported path. If only the length of the path is sought,O(logn) query time suffices. Furthermore, we show an ?(n logn) time lower bound for the case where the source and destination points are known in advance, which implies the optimality of our algorithm in this case.

Published
1989

293. Differentiation Capacity of Cultured B Lymphocytes from Immunodeficient Patients

Author

A. R. Lawton, L. Y. F. Wu, and M. D. Cooper

Subjects
Adult, Male, Adolescent, Lymphocyte, Cellular differentiation, Immunoglobulins, Plasma cell, Lymphocyte Activation, Immunofluorescence, Agammaglobulinemia, medicine, Humans, Carbon Radioisotopes, Child, Immunoelectrophoresis, Cells, Cultured, B-Lymphocytes, medicine.diagnostic_test, biology, Pokeweed mitogen, Immunologic Deficiency Syndromes, Infant, Cell Differentiation, Articles, General Medicine, Middle Aged, In vitro, medicine.anatomical_structure, Child, Preschool, Humoral immunity, Immunology, biology.protein, Autoradiography, Female, Mitogens, Antibody, Cell Division
Abstract

Peripheral blood lymphocytes from 27 healthy individuals and from 18 patients with a diverse spectrum of defects in humoral immunity were examined for their capacity to undergo terminal differentiation in vitro. Pokeweed mitogen induced cells from normal persons to synthesize and secrete IgM. IgG, and IgA as detected by Immunofluorescence and incorporation of [(14)C]amino acids, Lymphocytes from three boys with X-linked agammaglobulinemia were stimulated to proliferate, but did not synthesize immunoglobulin. Lymphocyte cultures from three of four patients having agammaglobulinemia with B lymphocytes produced different immunoglobulin classes in ratios similar to the in vivo distribution of classes of B lymphocytes, Lymphocytes from a dysgammaglobulinemic boy deficient in serum IgG and IgA, but who had normal numbers of IgM-, IgG-, and IgA-bearing B lymphocytes, could not be stimulated by pokeweed mitogen to make IgG and IgA. Synthesis and secretion of IgA, as well as IgM and IgG, was detected in cell cultures from each of 10 patients with isolated IgA deficiency. The results suggest that deficiencies in immunoglobulin synthesis may reflect either (a) failure to develop B lymphocytes, (b) arrested development of B lymphocytes due to intrinsic metabolic abnormalities, or (c) disturbance of factors extrinsic to the B lymphocyte which are essential for normal induction of plasma cell maturation.

Published
1973

294. A faster approximation algorithm for the Steiner problem in graphs

Author

Peter Widmayer, Y F Wu, and C. K. Wong

Subjects
Discrete mathematics, Graph center, Pseudoforest, Spanning tree, Computer Networks and Communications, Minimum spanning tree, k-minimum spanning tree, Steiner tree problem, Combinatorics, symbols.namesake, Graph power, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, symbols, Path graph, Computer Science::Data Structures and Algorithms, Software, MathematicsofComputing_DISCRETEMATHEMATICS, Information Systems, Mathematics
Abstract

We present an algorithm for finding a Steiner tree for a connected, undirected distance graph with a specified subset S of the set of vertices V. The set V-S is traditionally denoted as Steiner vertices. The total distance on all edges of this Steiner tree is at most 2(1−1/l) times that of a Steiner minimal tree, where l is the minimum number of leaves in any Steiner minimal tree for the given graph. The algorithm runs in O(¦E¦log¦V¦) time in the worst case, where E is the set of all edges and V the set of all vertices in the graph. It improves dramatically on the best previously known bound of O(¦S¦¦V¦2), unless the graph is very dense and most vertices are Steiner vertices. The essence of our algorithm is to find a generalized minimum spanning tree of a graph in one coherent phase as opposed to the previous multiple steps approach.

Published
1986

295. Distance problems in computational geometry with fixed orientations

Author

Y. F. Wu, C. K. Wong, and Peter Widmayer

Subjects
Combinatorics, Line segment, Diagonal, Path (graph theory), Regular polygon, Boundary (topology), Minimum spanning tree, Computational geometry, Voronoi diagram, Topology, Mathematics
Abstract

In computational geometry, problems involving only rectilinear objects with edges parallel to the x -and y-axes have attracted great attention. They are often easier to solve than the same problems for arbitrary objects, and solutions are of high practical value, for instance in VLSI design. This is because in VLSI design technology requirements often dictate the use of only two orthogonal orientations for the boundary edges of objects as well as wires.The restriction on the boundary edges motivates the study of rectilinear objects, while the restriction on wires brings the focus on the well-known L1-metric (the Manhattan distance). In short, given the two orthogonal orientations, both the shape of objects and the distance function are determined in a natural way.More recent VLSI fabrication technology is capable of creating edges and wires in both the orthogonal and diagonal orientations. This motivates us to study more general polygons, and to generalize the distance concept to the case where any fixed set of orientations is allowed. We introduce a family of naturally induced metrics, and the subsequent generalization of geometrical concepts. A shortest connection between two points is in this case a path composed of line segments with only the given orientations. We derive optimal solutions for various basic planar distance problems in this setting, such as the computation of a Voronoi diagram, a minimum spanning tree, and the (minimum and maximum) distance between two convex polygons. Many other theoretically interesting and practically relevant problems remain to be solved. In particular, the new family of metrics may help bridge the gap between the L1- and the L2-metrics, as those are the limiting cases for two and infinitely many regularly distributed orientations.

Published
1985

297. Ontogeny of B-lymphocyte differentiation induced by pokeweed mitogen

Author

A. Blanco, Alexander R. Lawton, Max D. Cooper, and L. Y. F. Wu

Subjects
Adult, Aging, Ontogeny, Immunology, Biology, Lymphocyte Activation, Pathology and Forensic Medicine, Fetus, Pregnancy, Immunology and Allergy, Humans, Cells, Cultured, B-Lymphocytes, Pokeweed mitogen, Infant, Newborn, Cell Differentiation, B Lymphocyte Differentiation, Fetal Blood, In vitro, Immunoglobulin A, Immunoglobulin M, Cytoplasm, Immunoglobulin G, biology.protein, Female, Antibody, Mitogens, Function (biology)
Abstract

Pokeweed mitogen (PWM) induces normal adult lymphocytes to divide and differentiate in vitro to cells containing large amounts of cytoplasmic immunoglobulin of the major classes IgM, IgG, and IgA. We have used this assay to study the ontogeny of B-lymphocyte function in humans. The response of lymphocytes from fetuses, newborns, and infants up to 2 months of age is quantitatively deficient with respect to adult cells and also differs qualitatively in being primarily of the IgM class. Whether the differences in response of fetal and adult lymphocytes are due to functional immaturity of B lymphocytes or to development of regulatory T cells is discussed.

Published
1976

300. [Developments in the treatment of complications of neoplastic diseases]

Author

Y F, Wu

Subjects
Blood Platelets, Antineoplastic Agents, Bone Marrow Cells, Infections, Pneumococcal Infections, Anti-Bacterial Agents, Hematopoiesis, Postoperative Complications, Neoplasms, Streptococcal Infections, Androgens, Humans, Kidney Failure, Chronic, Transplantation, Homologous, Blood Transfusion, Bone Marrow Diseases, Bone Marrow Transplantation
Published
1974

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