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1. New strategy using plant growth regulator AVG to increase fruit set on apples in mild climatic region in southern Brazil

Author: L. Rufato, G.F. Sander, P.D. Welter, M.F.G. Pereira, P.S. da Silva, A.F. Schultz, and D. Petry
Subjects: Horticulture
Published: 2022

2. Understanding feeding complexity and culture in the NICU: A qualitative study

Author: Ashlea D. Cardin, Paige A. Conner, Hannah R. Hedrick, Kasey D. Hoelscher, and Allison D. Petry
Subjects: Pediatrics
Published: 2023

3. A search for signatures of interactions of X-ray binary outflows with their environments with ALMA

Author: D. Petry, Hauyu Baobab Liu, C. M. V. Impellizzeri, M. Diaz Trigo, and Elizabeth Humphreys
Subjects: Submillimeter: stars, Young stellar object, Continuum (design consultancy), X-ray binary, FOS: Physical sciences, Astrophysics, Astrophysics - high energy astrophysical phenomena, 01 natural sciences, Submillimeter Array, law.invention, X-rays: binaries, law, 0103 physical sciences, Stars: black holes, Maser, 010303 astronomy & astrophysics, Line (formation), Physics, High Energy Astrophysical Phenomena (astro-ph.HE), 010308 nuclear & particles physics, Astronomy and Astrophysics, Stars: neutron, Interstellar medium, Stars, ISM: jets and outflows, Space and Planetary Science
Abstract: We observed the X-ray binaries CirX-1, ScoX-1, GRS 1915+105, GX13+1, and CygX-1 with the Atacama Large Millimeter/submillimeter Array (ALMA). Unresolved continuum emission is found at the positions of all the sources at a frequency of 92 GHz, with flux densities ranging between 0.8 and 10 mJy/beam. In all cases the emission can be associated with jets that have been extensively observed at lower frequencies. We searched for line emission from H$\alpha$ recombination, SiO,H2O, and CH3OH at the positions of all the sources and, for CirX-1 and CygX-1, also at regions where shocks associated with an interaction between the jet and the interstellar medium had previously been observed. The search did not yield any significant detection, resulting in 3$\sigma$ upper limits between 0.65 and 3.7 K km s$^{-1}$ for the existence of line emission in these regions. In contrast, we detected spatially unresolved SiO emission in the field of view of GX13+1, and we tentatively associate this emission with a SiO maser in a potential young stellar object or evolved star. We also found spatially extended line emission at two additional sites in the field of view of GX13+1 that we tentatively associate with emission from SO and CH3OH; we speculate that it may be associated with a star-forming region, but again we cannot rule out alternative origins such as emission from evolved stars., Comment: Accepted for publication in A&A
Published: 2021
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4. Improving ALMA's data processing effciency using a holistic approach

Author: Kouichiro Nakanishi, Catarina Ubach, T. Stanke, Erica Keller, D. Petry, Harold Francke, Junko Ueda, Luciano Cerrigone, Theodoros Nakos, and Alfonso Trejo
Subjects: Data processing, Data acquisition, business.industry, Observatory, Computer science, Data management, FOS: Physical sciences, business, Telecommunications, Astrophysics - Instrumentation and Methods for Astrophysics, Throughput (business), Submillimeter Array, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract: ALMA (Atacama Large Millimeter/submillimeter Array) is the world's largest ground-based facility for observations in the millimeter/submillimeter regime. One of ALMA's outstanding characteristics is the large effort dedicated to the quality assurance (QA) of the calibrated and imaged data products offered to the astronomical community. The Data Management Group (DMG), in charge of the data processing, review, and delivery of the ALMA data, consists of approximately 60 experts in data reduction, from the ALMA Regional Centers (ARCs) and the Joint ALMA Observatory (JAO), distributed in fourteen countries. With a throughput of more than 3,000 datasets per year, meeting the goal of delivering the pipeline-able data products within 30 days after data acquisition is a huge challenge. This paper presents (a) the history of data processing at ALMA, (b) the challenges our team had and is still facing, (c) the methodology followed to mitigate the operational risks, (d) the ongoing optimization initiatives, (e) the current data processing status, (f) the strategy which is being followed so that, in a few Cycles from now, a team of approximately 10 data reducers (DRs) at JAO can process and review some 80% of the datasets collected during an observing cycle, and, finally, (g) the important role of the ARCs for processing the remaining datasets., Comment: 18 pages, 5 figures, paper presented at the December 2020 SPIE virtual conference on Astronomical Telescopes and Instrumentation
Published: 2021
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5. A search for millimeter emission from the coldest and closest brown dwarf with ALMA

Author: Valentin D. Ivanov and D. Petry
Subjects: Physics, 010308 nuclear & particles physics, Brown dwarf, FOS: Physical sciences, Astronomy and Astrophysics, Quasar, Context (language use), Astrometry, Astrophysics, Light curve, Atacama Large Millimeter Array, 01 natural sciences, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, 0103 physical sciences, Millimeter, 010303 astronomy & astrophysics, Noise (radio), Solar and Stellar Astrophysics (astro-ph.SR)
Abstract: Context: WISE J085510.83-071442.5 (W0855) is a unique object: with Teff ca. 250 K, it is the coldest known brown dwarf (BD), located at only ca.2.2 pc form the Sun. It is extremely faint, which makes any astronomical observations difficult. However, at least one remotely similar ultra-low-mass object, the M9 dwarf TVLM 513-46546, has been shown to be a steady radio emitter at frequencies up to 95 GHz with superimposed active states where strong, pulsed emission is observed. Aims: Our goal is to determine the millimeter radio properties of W0855 with deep observations around 93 GHz (3.2 mm) in order to investigate whether radio astrometry of this object is feasible and to measure or set an upper limit on its magnetic field. Methods: We observed W0855 for 94 min at 85.1-100.9 GHz on 24 December 2019 using 44 of the Atacama Large millimeter Array (ALMA) 12 m antennas. We used the standard ALMA calibration procedure and created the final image for our analysis by accommodating the Quasar 3C 209, the brightest nearby object by far. Furthermore, we created a light curve with a 30 s time resolution to search for pulsed emission. Results: Our observations achieve a noise RMS of 7.3 {\mu}Jy/beam for steady emission and of 88 {\mu}Jy for 30 s pulses in the aggregated bandwidth (Stokes I). There is no evidence for steady or pulsed emission from the object at the time of the observation. We derive 3 {\sigma} upper limits of 21.9 {\mu}Jy on the steady emission and of 264 {\mu}Jy on the pulsed emission of W0855 between 85 GHz and 101 GHz. Conclusions: Together with the recent non-detection of W0855 at 4-8 GHz, our constraints on the steady and pulsed emission from W0855 confirm that the object is neither radio-loud nor magnetospherically particularly active., Comment: 4 pages, 3 figures, accepted by A&A
Published: 2020

6. Calibration of ALMA as a Phased Array. ALMA Observations During the 2017 VLBI Campaign

Author: Maciek Wielgus, Violette Impellizzeri, Remo P. J. Tilanus, Lynn D. Matthews, Rubén Herrero-Illana, Hugo Messias, Ed Fomalont, Michael Janssen, E. Villard, Ciriaco Goddi, Jan Wagner, Geoffrey B. Crew, D. Petry, N. Phillips, Ivan Marti-Vidal, Helge Rottmann, and Lindy Blackburn
Subjects: Physics, 010504 meteorology & atmospheric sciences, Phased array, Calibration (statistics), Astronomy, FOS: Physical sciences, Astronomy and Astrophysics, 01 natural sciences, Space and Planetary Science, 0103 physical sciences, Very-long-baseline interferometry, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, Remote sensing
Abstract: We present a detailed description of the special procedures for calibration and quality assurance of Atacama Large Millimeter/submillimeter Array (ALMA) observations in Very Long Baseline Interferometry (VLBI) mode. These procedures are required to turn the phased ALMA array into a fully calibrated VLBI station. As an illustration of these methodologies, we present full-polarization observations carried out with ALMA as a phased array at 3mm (Band 3) and 1.3mm (Band 6) as part of Cycle-4. These are the first VLBI science observations conducted with ALMA and were obtained during a 2017 VLBI campaign in concert with other telescopes worldwide as part of the Global mm-VLBI Array (GMVA, April 1-3) and the Event Horizon Telescope (EHT, April 5-11) in ALMA Bands 3 and 6, respectively., 39 pages, 20 figures, 10 tables, accepted by PASP
Published: 2019

7. PNS167 QUANTITATIVE AND QUALITATIVE ANALYSIS OF DIFFERENCES IN AMNOG OUTCOMES BETWEEN IQWIG AND G-BA BETWEEN 2011-2018

Author: J. Dehnen, D. Petry, F. Kruse, and J. Bercher
Subjects: medicine.medical_specialty, Qualitative analysis, Health Policy, Family medicine, Public Health, Environmental and Occupational Health, medicine, AMNOG, Psychology
Published: 2019

8. PHP139 - G-BA CONDITIONAL APPROVALS IN THE AMNOG PROCEDURE: IMPACT ON HTA OUTCOMES AND PRICE

Author: J. Dehnen, D. Petry, J. Bercher, and F. Kruse
Subjects: 03 medical and health sciences, 0302 clinical medicine, Actuarial science, Health Policy, Public Health, Environmental and Occupational Health, AMNOG, 030212 general & internal medicine, Business, 030226 pharmacology & pharmacy
Published: 2018

9. Thermal and Oxidation Response of UHTC Leading Edge Samples Exposed to Simulated Hypersonic Flight Conditions

Author: Melvin D. Petry, Michael K. Cinibulk, Mark R. Gruber, Tarun Mathur, and Triplicane A. Parthasarathy
Subjects: Jet (fluid), Leading edge, Materials science, Hafnon, Heat flux, Drop (liquid), Materials Chemistry, Ceramics and Composites, Hypersonic flight, Forensic engineering, Evaporation, Scramjet, Composite material
Abstract: Sharp Leading Edge (LE) samples of UHTC (20 vol%SiC-HfB2) and SiC were exposed to simulated hypersonic flight conditions using a direct-connect scramjet rig and their thermal and oxidation responses measured. The measured backwall temperatures and scale thicknesses were significantly smaller than might be expected from stagnation temperatures at the LE. Furthermore, the scale that formed around the LE was more uniform than expected from the steep drop in cold wall heat flux with distance from the tip. These results were interpreted and rationalized using physics-based models. An aerothermal model in combination with an oxidation model accounted for the observed scale thicknesses at the tip and their slight variation with distance. The scale thicknesses were similar to values reported for exposures in furnaces at temperatures calculated for the tip, but less than those reported in arc jet tests. The formation of Hafnon (HfSiO4) and the absence of external glassy layer and of silica in the outer portions of the oxide region are unique to scramjet tested samples, presumably due to the high fluid flow (high shear and evaporation) rates.
Published: 2013

10. Efficacy of iron-biofortified crops

Author: Boy, Erick; Haas, Jere D.; Petry, Nicolai; Cercamondi CI; Gahutu, Jean B.; Mehta S.; Finkelstein, Julia L.; Hurrell, Richard F., http://orcid.org/0000-0002-0271-1725 Boy, Erick, Boy, Erick; Haas, Jere D.; Petry, Nicolai; Cercamondi CI; Gahutu, Jean B.; Mehta S.; Finkelstein, Julia L.; Hurrell, Richard F., and http://orcid.org/0000-0002-0271-1725 Boy, Erick
Abstract: PR, IFPRI3; CRP4, HarvestPlus; A4NH, CGIAR Research Program on Agriculture for Nutrition and Health (A4NH)
Published: 2017

11. VERITAS: the Very Energetic Radiation Imaging Telescope Array System

Author: T.C Weekes, H Badran, S.D Biller, I Bond, S Bradbury, J Buckley, D Carter-Lewis, M Catanese, S Criswell, W Cui, P Dowkontt, C Duke, D.J Fegan, J Finley, L Fortson, J Gaidos, G.H Gillanders, J Grindlay, T.A Hall, K Harris, A.M Hillas, P Kaaret, M Kertzman, D Kieda, F Krennrich, M.J Lang, S LeBohec, R Lessard, J Lloyd-Evans, J Knapp, B McKernan, J McEnery, P Moriarty, D Muller, P Ogden, R Ong, D Petry, J Quinn, N.W Reay, P.T Reynolds, J Rose, M Salamon, G Sembroski, R Sidwell, P Slane, N Stanton, S.P Swordy, V.V Vassiliev, and S.P Wakely
Subjects: Aperture, primordial black-holes, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Field of view, Reflector (antenna), Stereoscopy, Astrophysics, galactic plane, law.invention, Telescope, Optics, supernova-remnants, neutralinos, law, gamma-ray astronomy, air cerenkov telescopes, tev, Cherenkov radiation, Very Energetic, atmospheric cherenkov radiation, supernova remnants, Physics, Pixel, business.industry, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, gamma-ray telescopes, Astronomy and Astrophysics, acceleration, very-high-energy, pulsars, markarian-421, agn, galaxy, business
Abstract: The Very Energetic Radiation Imaging Telescope Array System (VERITAS) represents an important step forward in the study of extreme astrophysical processes in the universe. It combines the power of the atmospheric Cherenkov imaging technique using a large optical reflector with the power of stereoscopic observatories using arrays of separated telescopes looking at the same shower. The seven identical telescopes in VERITAS, each of aperture 10 m, will be deployed in a filled hexagonal pattern of side 80 m; each telescope will have a camera consisting of 499 pixels with a field of view of 3.5 deg VERITAS will substantially increase the catalog of very high energy (E > 100GeV) gamma-ray sources and greatly improve measurements of established sources., 44 pages, 16 figures
Published: 2016

12. VERITAS and multiwavelength observations of the BL Lacertae object 1ES 1741+196

Author: J. V. Cardenzana, J. Biteau, C. A. Johnson, A. McCann, N. Kelley-Hoskins, K. Reynolds, R. A. Ong, Sinéad M. Griffin, D. Petry, D. S. Hanna, A. N. Otte, M. P. Connolly, Lucy Fortson, P. Kaaret, S. McArthur, V. Bugaev, J. Tyler, E. Roache, J. P. Finley, David Kieda, J. H. Buckley, B. Zitzer, A. Archer, F. Krennrich, G. H. Gillanders, J. Grube, G. Ratliff, Wystan Benbow, Manel Errando, A. Flinders, M. J. Lang, Xuhui Chen, Q. Feng, Abraham D. Falcone, Karlen Shahinyan, A. Popkow, E. Pueschel, Maria Krause, M. Huetten, O. M. Weiner, M. Kertzman, M. Buchovecky, A. O'Faolain de Bhroithe, Karen Byrum, J. D. Eisch, A. Weinstein, K. Meagher, Henrike Fleischhack, A. W. Smith, T. B. Humensky, S. Archambault, Martin Pohl, Gordon T. Richards, Geza Gyuk, P. Fortin, Marcos Santander, J. Dumm, Ralph Bird, Jodi Christiansen, John L. Quinn, P. T. Reynolds, C. B. Rulten, Matteo Cerruti, Amy Furniss, P. Moriarty, Daniel Nieto, L. Ciupik, K. Ragan, A. Wilhelm, S. Vincent, Hugh Dickinson, N. H. Park, S. O'Brien, J. V. Tucci, Gernot Maier, S. P. Wakely, R. Mukherjee, Anushka Udara Abeysekara, V. Pelassa, A. Petrashyk, P. Kar, G. H. Sembroski, David A. Williams, D. Staszak, I. Telezhinsky, Jamie Holder, L. C. Reyes, and Wei Cui
Subjects: Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Flux, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, telescope, 01 natural sciences, law.invention, Telescope, swift, law, gamma-ray astronomy, 0103 physical sciences, Blazar, 010303 astronomy & astrophysics, relativistic processes, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Spectral index, 010308 nuclear & particles physics, tev blazars, Institut für Physik und Astronomie, Astronomy, Astronomy and Astrophysics, Gamma-ray astronomy, source catalog, lac objects, spectral energy-distributions, Crab Nebula, x-ray, Space and Planetary Science, astroparticle physics, Spectral energy distribution, ddc:520, High Energy Physics::Experiment, Astrophysics - High Energy Astrophysical Phenomena, fermi, galaxies: individual: 1es 1741+196=ver j1744+195, discovery, BL Lac object
Abstract: Monthly notices of the Royal Astronomical Society 459(3), 2550 - 2557 (2016). doi:10.1093/mnras/stw664, We present results from multiwavelength observations of the BL Lacertae object 1ES 1741 + 196, including results in the very high energy γ-ray regime using the Very Energetic Radiation Imaging Telescope Array System (VERITAS). The VERITAS time-averaged spectrum, measured above 180 GeV, is well modelled by a power law with a spectral index of 2.7 ± 0.7$_{stat}$ ± 0.2syst. The integral flux above 180 GeV is (3.9 ± 0.8$_{stat}$ ± 1.0$_{syst}$) × 10$^{−8}$ m$^{−2}$ s$^{−1}$, corresponding to 1.6 per cent of the Crab nebula flux on average. The multiwavelength spectral energy distribution of the source suggests that 1ES 1741+196 is an extreme-high-frequency-peaked BL Lacertae object. The observations analysed in this paper extend over a period of six years, during which time no strong flares were observed in any band. This analysis is therefore one of the few characterizations of a blazar in a non-flaring state., Published by Oxford Univ. Press, Oxford
Published: 2016
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13. Effective Thermal-Conductivity Measurements on Supporting Structures of the Mercury Probe Bepi Colombo

Author: H. P. Ebert, S. Rausch, D. Petry, S. Vidi, and A. Löhberg
Subjects: Thermal contact conductance, Materials science, Correction method, business.industry, Thermal resistance, Thermal contact, Condensed Matter Physics, law.invention, Thermal transmittance, Honeycomb structure, Optics, Thermal conductivity, law, Composite material, business, Mercury probe
Abstract: Measurements were done on a carbon fiber reinforced composite (CFC) sample tested for the space probe Bepi Colombo by using the guarded hot-plate (GHP) method. The values of interest were the thermal transmittance through the samples, (56.3 ± 3.6) W · m−2 · K−1, and the effective thermal conductivity (1.06 ± 0.07) W · m−1 · K−1. The samples consist of a light honeycomb core attached to thicker surface plates. Due to this construction, the effective thermal conductivity parallel to the face plates is higher than the effective thermal conductivity through the sample. This leads to lateral heat gains or losses during the GHP measurement, which in return can lead to erroneous results. Furthermore, due to the high rigidity of the CFC material, there will be high contact resistances between the samples and the GHP apparatus plates. The separation of these thermal contact resistances from the total measured thermal resistance is essential in order to achieve correct results. Good results were achieved using a special measurement setup and a lateral correction method designed to reduce errors due to lateral heat flows.
Published: 2012

14. Structural conditions in German water supply

Author: P. Levai, J. Bräcker, W. Merkel, N. Staben, D. Petry, M. Neskovic, and M. Weiss
Subjects: Economic efficiency, Actuarial science, business.industry, Process (engineering), media_common.quotation_subject, Comparability, Water supply, Sample (statistics), Environmental economics, Economics, Quality (business), Cluster analysis, business, Reliability (statistics), Water Science and Technology, media_common
Abstract: Against the background of price controls for drinking water supply utilities in Germany, the comparability of utilities with regard to their specific structural conditions comes into focus. Relevant structural conditions were identified for the two main technical processes, namely water production (WP) and treatment, storage and distribution (TSD). A defined clustering process for comparable utilities has been developed. At the end of the process, groups of comparable utilities are obtained including information to what extent and in which structural condition these utilities are similar. These sets of relevant structural conditions and the clustering process were verified in a data assessment study with 45 German utilities. Applying the clustering process to the sample, WP and TSD peer groups of a certain utility are obtained, where structural similarities are above a certain threshold value. Performance and cost indicators of comparable utilities have been evaluated, providing interesting data on general performance levels and spread among individual utilities. The survey underlines the high standard of German water supply in terms of reliability, quality, customer service, sustainability and economic efficiency.
Published: 2011

15. EVIDENCE FOR LONG-TERM GAMMA-RAY AND X-RAY VARIABILITY FROM THE UNIDENTIFIED TeV SOURCE HESS J0632+057

Author: V. A. Acciari, E. Aliu, T. Arlen, M. Beilicke, W. Benbow, D. Boltuch, S. M. Bradbury, J. H. Buckley, V. Bugaev, K. Byrum, A. Cannon, A. Cesarini, Y. C. Chow, L. Ciupik, P. Cogan, R. Dickherber, C. Duke, T. Ergin, A. Falcone, S. J. Fegan, J. P. Finley, G. Finnegan, P. Fortin, L. Fortson, A. Furniss, K. Gibbs, G. H. Gillanders, J. Grube, R. Guenette, G. Gyuk, D. Hanna, J. Holder, D. Horan, C. M. Hui, T. B. Humensky, A. Imran, P. Kaaret, N. Karlsson, M. Kertzman, D. Kieda, J. Kildea, A. Konopelko, H. Krawczynski, F. Krennrich, M. J. Lang, S. LeBohec, G. Maier, A. McCann, M. McCutcheon, J. Millis, P. Moriarty, R. Mukherjee, R. A. Ong, A. N. Otte, D. Pandel, J. S. Perkins, D. Petry, M. Pohl, J. Quinn, K. Ragan, L. C. Reyes, P. T. Reynolds, H. J. Rose, M. Schroedter, G. H. Sembroski, A. W. Smith, D. Steele, S. Swordy, M. Theiling, J. A. Toner, A. Varlotta, V. V. Vassiliev, S. Vincent, R. G. Wagner, S. P. Wakely, J. E. Ward, T. C. Weekes, A. Weinstein, T. Weisgarber, D. A. Williams, S. Wissel, and M. Wood
Subjects: stars, catalog, Be star, Astrophysics::High Energy Astrophysical Phenomena, binary, FOS: Physical sciences, Astrophysics, telescope, 01 natural sciences, emission, 0103 physical sciences, 010303 astronomy & astrophysics, acceleration of particles, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, 010308 nuclear & particles physics, stars: individual (hess j0632+057, mwc 148), Gamma ray, X-ray, Astronomy and Astrophysics, Crab Nebula, binaries: general, Space and Planetary Science, Astrophysics - High Energy Astrophysical Phenomena, gamma rays: observations, discovery
Abstract: HESS J0632+057 is one of only two unidentified very-high-energy gamma-ray sources which appear to be point-like within experimental resolution. It is possibly associated with the massive Be star MWC 148 and has been suggested to resemble known TeV binary systems like LS I +61 303 or LS 5039. HESS J0632+057 was observed by VERITAS for 31 hours in 2006, 2008 and 2009. During these observations, no significant signal in gamma rays with energies above 1 TeV was detected from the direction of HESS J0632+057. A flux upper limit corresponding to 1.1% of the flux of the Crab Nebula has been derived from the VERITAS data. The non-detection by VERITAS excludes with a probability of 99.993% that HESS J0632+057 is a steady gamma-ray emitter. Contemporaneous X-ray observations with Swift XRT reveal a factor of 1.8+-0.4 higher flux in the 1-10 keV range than earlier X-ray observations of HESS J0632+057. The variability in the gamma-ray and X-ray fluxes supports interpretation of the ob ject as a gamma-ray emitting binary., Comment: 8 pages, 3 figures, Accepted for publication in The Astrophysical Journal
Published: 2009

16. Mode I fracture of large-scale welded thin-walled AA 6061 extruded panels

Author: Tomasz Wierzbicki, D. Petry, L. Zheng, and H. Rapp
Subjects: Materials science, business.industry, Fissure, Mechanical Engineering, Stress–strain curve, Fracture mechanics, Building and Construction, Structural engineering, Crack growth resistance curve, Crack closure, Fracture toughness, medicine.anatomical_structure, mental disorders, Fracture (geology), medicine, Composite material, Deformation (engineering), business, Civil and Structural Engineering
Abstract: This paper presents the experimental and numerical investigation on deformation and fracture of the large-scale welded thin-walled AA 6061 panels under Mode I loading. The proposed model is able to successfully capture crack initiation, initial growth, as well as a more complicated phenomenon where the crack undergoes a sudden jump to a new location and steadily propagates. The fracture process was explained by an in-depth analysis of the local stress and strain fields along the crack path.
Published: 2009

17. Characterization of material and fracture of AA6061 butt weld

Author: H. Rapp, D. Petry, Tomasz Wierzbicki, and L. Zheng
Subjects: Engineering, business.industry, Mechanical Engineering, Butt welding, Metallurgy, Building and Construction, Welding, Plasticity, law.invention, Machining, law, Ultimate tensile strength, Fracture (geology), Butt joint, Composite material, business, Civil and Structural Engineering, Tensile testing
Abstract: As a critical part of a comprehensive study on fracture of welded thin-walled aluminum structures for train safety, a material testing procedure was developed to calibrate heterogeneous weldments for plasticity and fracture. This technique eliminates the need for machining and testing of miniature tensile specimens, cut from different zones within the weldment. The material characterization for plasticity and fracture of each of the material zones within the weld is reported, as a combination of experimental and numerical studies. The material data were applied in further investigation on large-scale Mode I and Mode III test as presented in the two accompanying papers [Zheng L, et al., Mode I fracture of large scale welded thin-walled AA 6061 extruded panels, submitted as an accompanying paper; Zheng L, et al., Mode III fracture of large scale welded thin-walled AA 6061 extruded panels. Thin-Walled Structures 2008; 46(11): 1262–73].
Published: 2009

18. Mode III fracture of a large-scale welded extruded aluminum panel

Author: L. Zheng, Tomasz Wierzbicki, H. Rapp, and D. Petry
Subjects: Engineering, Computer simulation, Scale (ratio), business.industry, Mechanical Engineering, Mode (statistics), Fracture mechanics, Building and Construction, Structural engineering, Welding, Deformation (meteorology), Finite element method, Physics::Geophysics, law.invention, law, Fracture (geology), business, Civil and Structural Engineering
Abstract: As part of the research on deformation and fracture of the large-scale welded thin-walled AA 6061 panels, this paper presents the experimental and numerical investigation on its fracture under Mode III loading. The proposed local fracture approach is applied by incorporating the calibrated damage input data into the finite element model. The investigations demonstrate that the present finite element model can successfully predict the global force–deflection response, the deformation modes, as well as the crack formation and propagation, in this quite sophisticated problem involving welded joints.
Published: 2008

19. The Whipple Observatory 10m gamma-ray telescope, 1997–2006

Author: G. E. Kenny, O. Celik, M. J. Lang, P. Moriarty, D. Petry, G. H. Gillanders, A. Konopelko, J. P. Finley, John Kildea, D. A. Carter-Lewis, F. Krennrich, T. C. Weekes, A. Syson, J. Millis, Y. C. K. Chow, J. Lloyd-Evans, I. D. Perez, I. Jung, M. K. Daniel, C. Duke, D. J. Fegan, H. J. Rose, R. J. White, S. P. Wakely, Daniel Gall, S. B. Hughes, J. S. Perkins, M. Jordan, A. W. Smith, J. Grube, Jamie Holder, J. H. Buckley, M. Schroedter, C. Dowdall, K. Gutierrez, John Toner, P. Cogan, S. M. Bradbury, G. H. Sembroski, R. W. Atkins, J. Knapp, P. A. Ogden, I. H. Bond, Henric Krawczynski, Lucy Fortson, R. A. Ong, D. Horan, S. LeBohec, J. Hall, T. Nagai, P. Rebillot, Martin Pohl, K. Kosack, Mark N. Quinn, Wei Cui, L. Valcarcel, M. Kertzman, G. Blaylock, H. M. Badran, V. V. Vassiliev, Tony Hall, Abraham D. Falcone, F. Pizlo, S. J. Fegan, and John L. Quinn
Subjects: Physics, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astronomy and Astrophysics, Context (language use), Gamma-ray astronomy, Cherenkov Telescope Array, law.invention, Primary mirror, Telescope, Observatory, law, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Cherenkov radiation, Fermi Gamma-ray Space Telescope
Abstract: Details are presented of the Whipple Observatory’s 10 m atmospheric Cherenkov telescope and camera, as it evolved during the period 1997 until 2006. The design of the telescope and camera’s optical and electronic systems is discussed together with a detailed description of the four-stage GRANITE (Gamma-RAy New Imaging TElescope) upgrade program, undertaken during the same time period. The objective of the upgrade was to improve the telescope’s sensitivity for the detection of very-high-energy gamma-rays. Results from the program are provided and are briefly discussed in the context of the design of VERITAS.
Published: 2007

20. Very High Energy Observations of Gamma‐Ray Burst Locations with the Whipple Telescope

Author: M. Schroedter, P. Cogan, J. Grube, R. W. Atkins, Vladimir Vassiliev, Y. C. K. Chow, M. K. Daniel, Karen Byrum, Gernot Maier, P. Fortin, A. D. Falcone, David Kieda, S. P. Wakely, John Kildea, H. Krawczynski, I. de la Calle Perez, Stephan LeBohec, S. P. Swordy, Jeremy Perkins, H. J. Rose, R. A. Ong, J. H. Buckley, R. J. White, K. Ragan, S. J. Fegan, D. Steele, P. T. Reynolds, M. Kertzman, M. J. Lang, Lucy Fortson, S. B. Hughes, R. G. Wagner, G. H. Sembroski, Thomas Brian Humensky, J. Hall, Jamie Holder, S. M. Bradbury, D. J. Fegan, P. Moriarty, John L. Quinn, G. Blaylock, J. P. Finley, T. C. Weekes, K. J. Gutierrez, D. Horan, T. N. Nagai, D. Petry, G. H. Gillanders, Frank Krennrich, C. Dowdall, O. Celik, D. S. Hanna, D. A. Williams, G. E. Kenny, H. M. Badran, John Toner, Wei Cui, L. Valcarcel, and Mark N. Quinn
Subjects: Physics, gamma rays : bursts, gamma rays : observations, Astronomy & Astrophysics, High energy, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Afterglow, law.invention, Telescope, compton emission, refreshed shocks, external matter, light-curve, afterglows, tev, models, flares, discovery, search, Space and Planetary Science, Observatory, law, Spectral energy distribution, Blazar, Gamma-ray burst, Flare
Abstract: Gamma-ray burst (GRB) observations at very high energies (VHE, E > 100 GeV) can impose tight constraints on some GRB emission models. Many GRB afterglow models predict a VHE component similar to that seen in blazars and plerions, in which the GRB spectral energy distribution has a double-peaked shape extending into the VHE regime. VHE emission coincident with delayed X-ray flare emission has also been predicted. GRB follow-up observations have had high priority in the observing program at the Whipple 10m Gamma-ray Telescope and GRBs will continue to be high priority targets as the next generation observatory, VERITAS, comes on-line. Upper limits on the VHE emission, at late times (>~4 hours), from seven GRBs observed with the Whipple Telescope are reported here., Accepted for publication in the January 20, 2007 volume of the Astrophysical Journal, 655, 396
Published: 2007

21. The 2014 ALMA Long Baseline Campaign: An Overview

Author: ALMA Partnership, E. B. Fomalont, C. Vlahakis, S. Corder, A. Remijan, D. Barkats, R. Lucas, T. R. Hunter, C. L. Brogan, Y. Asaki, S. Matsushita, W. R. F. Dent, R. E. Hills, N. Phillips, A. M. S. Richards, P. Cox, R. Amestica, D. Broguiere, W. Cotton, A. S. Hales, R. Hiriart, A. Hirota, J. A. Hodge, C. M. V. Impellizzeri, J. Kern, R. Kneissl, E. Liuzzo, N. Marcelino, R. Marson, A. Mignano, K. Nakanishi, B. Nikolic, J. E. Perez, L. M. Pérez, I. Toledo, R. Aladro, B. Butler, J. Cortes, P. Cortes, V. Dhawan, J. Di Francesco, D. Espada, F. Galarza, D. Garcia-Appadoo, L. Guzman-Ramirez, E. M. Humphreys, T. Jung, S. Kameno, R. A. Laing, S. Leon, J. Mangum, G. Marconi, H. Nagai, L.-A. Nyman, M. Radiszcz, J. A. Rodón, T. Sawada, S. Takahashi, R. P. J. Tilanus, T. van Kempen, B. Vila Vilaro, L. C. Watson, T. Wiklind, F. Gueth, K. Tatematsu, A. Wootten, A. Castro-Carrizo, E. Chapillon, G. Dumas, I. de Gregorio-Monsalvo, H. Francke, J. Gallardo, J. Garcia, S. Gonzalez, J. E. Hibbard, T. Hill, T. Kaminski, A. Karim, M. Krips, Y. Kurono, C. Lopez, S. Martin, L. Maud, F. Morales, V. Pietu, K. Plarre, G. Schieven, L. Testi, L. Videla, E. Villard, N. Whyborn, M. A. Zwaan, F. Alves, P. Andreani, A. Avison, M. Barta, F. Bedosti, G. J. Bendo, F. Bertoldi, M. Bethermin, A. Biggs, J. Boissier, J. Brand, S. Burkutean, V. Casasola, J. Conway, L. Cortese, B. Dabrowski, T. A. Davis, M. Diaz Trigo, F. Fontani, R. Franco-Hernandez, G. Fuller, R. Galvan Madrid, A. Giannetti, A. Ginsburg, S. F. Graves, E. Hatziminaoglou, M. Hogerheijde, P. Jachym, I. Jimenez Serra, M. Karlicky, P. Klaasen, M. Kraus, D. Kunneriath, C. Lagos, S. Longmore, S. Leurini, M. Maercker, B. Magnelli, I. Marti Vidal, M. Massardi, A. Maury, S. Muehle, S. Muller, T. Muxlow, E. O’Gorman, R. Paladino, D. Petry, J. Pineda, S. Randall, J. S. Richer, A. Rossetti, A. Rushton, K. Rygl, A. Sanchez Monge, R. Schaaf, P. Schilke, T. Stanke, M. Schmalzl, F. Stoehr, S. Urban, E. van Kampen, W. Vlemmings, K. Wang, W. Wild, Y. Yang, S. Iguchi, T. Hasegawa, M. Saito, J. Inatani, N. Mizuno, S. Asayama, G. Kosugi, K.-I. Morita, K. Chiba, S. Kawashima, S. K. Okumura, N. Ohashi, R. Ogasawara, S. Sakamoto, T. Noguchi, Y.-D. Huang, S.-Y. Liu, F. Kemper, P. M. Koch, M.-T. Chen, Y. Chikada, M. Hiramatsu, D. Iono, M. Shimojo, S. Komugi, J. Kim, A.-R. Lyo, E. Muller, C. Herrera, R. E. Miura, J. Ueda, J. Chibueze, Y.-N. Su, A. Trejo-Cruz, K.-S. Wang, H. Kiuchi, N. Ukita, M. Sugimoto, R. Kawabe, M. Hayashi, S. Miyama, P. T. P. Ho, N. Kaifu, M. Ishiguro, A. J. Beasley, S. Bhatnagar, J. A. Braatz III, D. G. Brisbin, N. Brunetti, C. Carilli, J. H. Crossley, L. D’Addario, J. L. Donovan Meyer, D. T. Emerson, A. S. Evans, P. Fisher, K. Golap, D. M. Griffith, A. E. Hale, D. Halstead, E. J. Hardy, M. C. Hatz, M. Holdaway, R. Indebetouw, P. R. Jewell, A. A. Kepley, D.-C. Kim, M. D. Lacy, A. K. Leroy, H. S. Liszt, C. J. Lonsdale, B. Matthews, M. McKinnon, B. S. Mason, G. Moellenbrock, A. Moullet, S. T. Myers, J. Ott, A. B. Peck, J. Pisano, S. J. E. Radford, W. T. Randolph, U. Rao Venkata, M. G. Rawlings, R. Rosen, S. L. Schnee, K. S. Scott, N. K. Sharp, K. Sheth, R. S. Simon, T. Tsutsumi, S. J. Wood, National Radio Astronomy Observatory (NRAO), Joint ALMA Observatory (JAO), European Southern Observatory (ESO)-National Radio Astronomy Observatory (NRAO), Institute for Ethnomedicine, University of Wyoming (UW), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Chimie des métaux de transition et catalyse (CMTC), Centre National de la Recherche Scientifique (CNRS)-Université Louis Pasteur - Strasbourg I, Istituto di Radioastronomia [Bologna] (IRA), Istituto Nazionale di Astrofisica (INAF), Institut Jacques Monod (IJM (UMR_7592)), Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), ESO, European Southern Observatory (ESO), Department of Organic and Polymeric Materials, Tokyo Institute of Technology [Tokyo] (TITECH), Biogeochemistry Research Centre, School of Chemistry, Onsala Space Observatory, Chalmers University of Technology [Göteborg], Institut de RadioAstronomie Millimétrique (IRAM), Centre National de la Recherche Scientifique (CNRS), AMOR 2015, Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Departamento de Analisis Matematico, Universidad de Málaga [Málaga] = University of Málaga [Málaga], Unité de recherche Zoologie Forestière (URZF), Institut National de la Recherche Agronomique (INRA), IFP Energies nouvelles (IFPEN), Fastopt GmbH, D-20357 Hamburg, Germany, Mathématiques Appliquées Paris 5 (MAP5 - UMR 8145), Université Paris Descartes - Paris 5 (UPD5)-Institut National des Sciences Mathématiques et de leurs Interactions (INSMI)-Centre National de la Recherche Scientifique (CNRS), Departament de Ecologia, Universitat d'Alacant, Centro de Estudios Ambientales del Mediterraneo, INAF - Osservatorio Astrofisico di Arcetri (OAA), Faculty of Medicine, Universidad de Chile = University of Chile [Santiago] (UCHILE), Université Pierre et Marie Curie - Paris 6 (UPMC), Unité de Recherche sur les Maladies Cardiovasculaires, du Métabolisme et de la Nutrition = Institute of cardiometabolism and nutrition (ICAN), Université Pierre et Marie Curie - Paris 6 (UPMC)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Sorbonne Université (SU), Laboratoire de génie électrique de Paris (LGEP), Université Paris-Sud - Paris 11 (UP11)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Centre National de la Recherche Scientifique (CNRS), Astronomical Institute of the Czech Academy of Sciences (ASU / CAS), Czech Academy of Sciences [Prague] (CAS), Max-Planck-Institut für Radioastronomie (MPIFR), Northern Illinois University (NORTHERN ILLINOIS UNIVERSITY), Northern Illinois University, Centre for Astrophysics Research [Hatfield], University of Hertfordshire [Hatfield] (UH), Jodrell Bank Centre for Astrophysics (JBCA), University of Manchester [Manchester], foreign laboratories (FL), CERN [Genève], Departements of Medicine and Microbiology, University of Alabama [Tuscaloosa] (UA), Swinburne University of Technology (Hawthorn campus), San Pedro de Atacama Celestial Explorations (SPACE), San Pedro de Atacama Celestial Explorations, General Electric Medical Systems [Buc] (GE Healthcare), General Electric Medical Systems, Laboratoire de Radiopathologie (LRP), Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de la Santé et de la Recherche Médicale (INSERM), Università degli Studi di Milano [Milano] (UNIMI), Altération génétique des cancers, chimioprévention et réponse thérapeutique, Physikalisches Institut [Köln], Universität zu Köln, Ministère de la santé, National Astronomical Observatory of Japan (NAOJ), National Institute for Materials Science (NIMS), Espaces acoustiques et cognitifs (EAC), Sciences et Technologies de la Musique et du Son (STMS), Institut de Recherche et Coordination Acoustique/Musique (IRCAM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche et Coordination Acoustique/Musique (IRCAM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Département de Mathématiques et Applications - ENS Paris (DMA), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Department of Chemistry and Biochemistry [Bern], University of Bern, Academia Sinica, Department of Marine Organic Biogeochemistry, Royal Netherlands Institute for Sea Research (NIOZ), Faculty of Geosciences, Utrecht University, Faculty of Geosciences, Brain Mind Institute (BMI - EPFL), Ecole Polytechnique Fédérale de Lausanne (EPFL), Departamento de Ingenieria Eléctrica (DIE), Universidad de Concepción [Chile], Laboratório de Bioinformática, Embrapa Recursos Genéticos e Biotecnologia, Graduate School of Engineering [The Univ of Tokyo] (UTokyo), The University of Tokyo (UTokyo), Kyushu University [Fukuoka], Mitsubishi Research Institute, Inc., Department of Computer Science and Automation [Bangalore] (CSA), Indian Institute of Science [Bangalore] (IISc Bangalore), National Radio Astronomy Observatory [Socorro] (NRAO), Occupational Physiology Laboratory (Vandœuvre-Les -Nancy, France), Computational Science and Engineering Department [Daresbury] (STFC), Science & Technologie Facilities Council, University College of London [London] (UCL), Centre for Atmospheric Chemistry [Wollongong] (CAC), University of Wollongong [Australia], Safety science group, Delft University of Technology (TU Delft), Centre d'Investigation Clinique - Innovation Technologique - INSERM - CHU de Grenoble (CIC-IT Grenoble (CIT803)), CHU Grenoble-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Grenoble Alpes (UGA), Northern Research Station, Forest Research [Great Britain], Department of Helsinki Institute for Information Technology Communications and Networking, Aalto University, University of Washington [Seattle], Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de la Santé et de la Recherche Médicale (INSERM), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Astronomy, Unité de Recherche sur les Maladies Cardiovasculaires, du Métabolisme et de la Nutrition = Research Unit on Cardiovascular and Metabolic Diseases (ICAN), Università degli Studi di Milano = University of Milan (UNIMI), Universität zu Köln = University of Cologne, Universidad de Concepción - University of Concepcion [Chile], Kyushu University, Istituto di Radioastronomia (IRA), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7), Universidad de Málaga [Málaga], Unité de recherche Zoologie Forestière (UZF), Science et Technologie du Lait et de l'Oeuf (STLO), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Mathématiques et de leurs Interactions (INSMI)-Université Paris Descartes - Paris 5 (UPD5), University of Chile [Santiago], Université Pierre et Marie Curie - Paris 6 (UPMC)-Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Pitié-Salpêtrière [APHP], Université Paris-Sud - Paris 11 (UP11)-Université Pierre et Marie Curie - Paris 6 (UPMC)-SUPELEC-Centre National de la Recherche Scientifique (CNRS), Astronomical Institute of the Czech Academy of Sciences, Czech Academy of Sciences [Prague] (ASCR), Jodrell Bank Centre for Astrophysics, School of Physics, Università degli studi di Milano [Milano], National Institute of Materials Science, Equipe Espaces acoustiques et cognitifs, Université Pierre et Marie Curie - Paris 6 (UPMC)-IRCAM-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-IRCAM-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Paris (ENS Paris)-Centre National de la Recherche Scientifique (CNRS), Department of Chemistry and Biochemistry, Graduate School of Engineering [Tokyo], The University of Tokyo, Center for Atmospheric Chemistry [Wollongong] (CAC), University of Wollongong, CHU Grenoble-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Joseph Fourier - Grenoble 1 (UJF), Forest Research, Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), École normale supérieure - Paris (ENS Paris), Université Grenoble Alpes (UGA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Grenoble, Joint ALMA Office (JAO), ALMA, Institut Jacques Monod (IJM), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Mathématiques et de leurs Interactions-Université Paris Descartes - Paris 5 (UPD5), ALMA Observatory, Laboratoire d'analyse et d'architecture des systèmes [Toulouse] (LAAS), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UPS), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique [Toulouse] (INP), Center for Brain Simulation, Ecole Polytechnique Fédérale de Lausanne, Université Joseph Fourier - Grenoble 1 (UJF)-CHU Grenoble-Institut National de la Santé et de la Recherche Médicale (INSERM), National Radio Astronomy Observatory ( NRAO ), Joint ALMA Office ( JAO ), University of Wyoming ( UW ), Max-Planck-Institut für Astronomie ( MPIA ), Chimie des métaux de transition et catalyse ( CMTC ), Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique ( CNRS ), Istituto di Radioastronomia ( IRA ), Istituto Nazionale di Astrofisica ( INAF ), Institut Jacques Monod ( IJM ), Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS ), European Southern Observatory ( ESO ), Tokyo Institute of Technology [Tokyo] ( TITECH ), Institut de RadioAstronomie Millimétrique ( IRAM ), Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'Astrophysique de Bordeaux [Pessac] ( LAB ), Université de Bordeaux ( UB ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Bordeaux ( UB ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Unité de recherche Zoologie Forestière ( UZF ), Institut National de la Recherche Agronomique ( INRA ), IFP Energies nouvelles ( IFPEN ), Science et Technologie du Lait et de l'Oeuf ( STLO ), Institut National de la Recherche Agronomique ( INRA ) -AGROCAMPUS OUEST, Mathématiques Appliquées à Paris 5 ( MAP5 - UMR 8145 ), Université Paris Descartes - Paris 5 ( UPD5 ) -Institut National des Sciences Mathématiques et de leurs Interactions-Centre National de la Recherche Scientifique ( CNRS ), INAF - Osservatorio Astrofisico di Arcetri ( OAA ), Université Pierre et Marie Curie - Paris 6 ( UPMC ), Unité de Recherche sur les Maladies Cardiovasculaires, du Métabolisme et de la Nutrition = Institute of cardiometabolism and nutrition ( ICAN ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Assistance publique - Hôpitaux de Paris (AP-HP)-Institut National de la Santé et de la Recherche Médicale ( INSERM ) -CHU Pitié-Salpêtrière [APHP], Laboratoire de génie électrique de Paris ( LGEP ), Université Paris-Sud - Paris 11 ( UP11 ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -SUPELEC-Centre National de la Recherche Scientifique ( CNRS ), Czech Academy of Sciences [Prague] ( ASCR ), Max-Planck-Institut für Radioastronomie ( MPIFR ), Northern Illinois University ( NORTHERN ILLINOIS UNIVERSITY ), Canadian Space Agency, foreign laboratories ( FL ), University of Alabama [Tuscaloosa] ( UA ), San Pedro de Atacama Celestial Explorations ( SPACE ), General Electric Medical Systems [Buc] ( GE Healthcare ), Laboratoire de Radiopathologie ( LRP ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Max Planck Institute for Biochemistry, Max-Planck-Institut, Department of Virology, Global COE Program, Nagasaki University-Institute of Tropical Medicine, Sciences et Technologies de la Musique et du Son ( STMS ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -IRCAM-Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -IRCAM-Centre National de la Recherche Scientifique ( CNRS ), Département de Mathématiques et Applications - ENS Paris ( DMA ), École normale supérieure - Paris ( ENS Paris ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'analyse et d'architecture des systèmes [Toulouse] ( LAAS ), Centre National de la Recherche Scientifique ( CNRS ) -Université Toulouse III - Paul Sabatier ( UPS ), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse ( INSA Toulouse ), Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ) -Institut National Polytechnique [Toulouse] ( INP ), Royal Netherlands Institute for Sea Research ( NIOZ ), Departamento de Ingenieria Eléctrica ( DIE ), AUTRES, Department of Computer Science and Automation [Bangalore] ( CSA ), Indian Institute of Science [Bangalore] ( IISc Bangalore ), National Radio Astronomy Observatory [Socorro] ( NRAO ), Computational Science and Engineering Department [Daresbury] ( STFC ), University College of London [London] ( UCL ), Center for Atmospheric Chemistry [Wollongong] ( CAC ), Delft University of Technology ( TU Delft ), Service Hématologie, Hôpital Morvan [Brest]-Centre Hospitalier Régional Universitaire de Brest ( CHRU Brest ), Centre d'Investigation Clinique - Innovation Technologique - INSERM - CHU de Grenoble ( CIC-IT Grenoble (CIT803) ), and Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Centre Hospitalier Universitaire de Grenoble
Subjects: [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], techniques: high angular resolution, Astronomy and Astrophysics, submillimeter: general, telescopes, Submillimeter Array, [ SDU.ASTR.CO ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Space and Planetary Science, techniques: interferometric, Environmental science, Millimeter, Baseline (configuration management), instrumentation: interferometers, QB, Remote sensing
Abstract: 著者人数: 248名, Accepted: 2015-04-10, 資料番号: SA1150145000
Published: 2015

22. Deployment of the VERITAS observatory

Author: S. P. Swordy, R. A. Ong, J. H. Buckley, M Schroedter, H. Manseri, Gernot Maier, F. Pizlo, S. LeBohec, D Horana, J. Lloyd-Evans, S. P. Wakely, G. Walker, Mark N. Quinn, G. Blaylock, J. Knapp, J. Hall, I. H. Bond, K. Ragan, H. M. Badran, F. Krennrich, R. W. Atkins, Vladimir Vassiliev, David Kieda, M. J. Lang, Martin Pohl, K. Kosack, P T Reynolds, Sm Bradbury, John L. Quinn, R. G. Wagner, D. Petry, K. G. Gibbs, Jeremy Perkins, S. Gammell, P Rebillot, E. Hays, P. A. Ogden, A. Syson, Reshmi Mukherjee, G. H. Gillanders, Jamie Holder, C Duke, Da Carter-Lewis, P. Fortin, H. J. Rose, D. J. Fegan, Y. C. Chow, G H Sembroski, Lucy Fortson, B. Power-Mooney, P. Moriarty, T Ergin, Dowdall, J. Grube, T. N. Nagai, A. D. Falcone, M K Daniel, M. A. Olevitch, David A. Williams, John Kildea, J. P. Finley, Henric Krawczynski, T. C. Weekes, R. J. White, S. B. Hughes, M. Kertzmann, Thomas Brian Humensky, P. Cogan, P. J. Boyle, S. J. Fegan, D. Steele, Paul Dowkontt, D. S. Hanna, W CuP, Jeffrey Zweerink, O. Celik, A. Milovanovic, G. E. Kenny, I. de la Calle Perez, P. Kaaret, E. Linton, and L. Valcarcel
Subjects: Physics, History, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Radiation imaging, Astronomy, Cherenkov Telescope Array, Computer Science Applications, Education, law.invention, Telescope, Observatory, Software deployment, law, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Galaxy Astrophysics, Cherenkov radiation
Abstract: The Very Energetic Radiation Imaging Telescope Array System (VERITAS) being constructed in Southern Arizona consists of an array of four Atmospheric Cherenkov 12m Telescopes designed to observe astrophysical gamma rays in the energy range from 100 GeV to tens of TeV. A first telescope has been in operation on a temporary site since the end of 2004 and meets all specifications. The second is being installed on the same site, 85m from the first, in order to test stereoscopic capabilities. The full system of four telescopes is expected to be installed on the definitive site by the end of 2006.
Published: 2006

23. A Survey of Unidentified EGRET Sources at Very High Energies

Author: J. McEnery, A. M. Hillas, O. Celik, J. H. Buckley, C. Duke, J. Grube, A. Syson, Dietrich Müller, David Kieda, J. Lloyd-Evans, A. Jarvis, J. Hall, K. Ragan, Reshmi Mukherjee, K. Kosack, P. Moriarty, F. Krennrich, V. V. Vassiliev, M. K. Daniel, G. H. Sembroski, J. Knapp, Wei Cui, B. Power-Mooney, D. J. Fegan, S. P. Swordy, Jamie Holder, I. de la Calle Perez, P. T. Reynolds, S. P. Wakely, G. Walker, S. J. Fegan, R. A. Ong, S. Le Bohec, G. E. Kenny, I. H. Bond, M. Schroedter, J. P. Finley, R. Pallassini, T. C. Weekes, Lucy Fortson, M. Jordan, M. Catanese, D. Petry, John Kildea, D. S. Hanna, P. Rebillot, P. J. Boyle, E. Linton, Henric Krawczynski, D. A. Carter-Lewis, H. M. Badran, M. D'Vali, Tony Hall, Mark N. Quinn, M. J. Lang, J. A. Gaidos, S. J. Nolan, A. Milovanovic, R. W. Lessard, Jeffrey Zweerink, H. J. Rose, S. M. Bradbury, Abraham D. Falcone, M. Kertzman, D. Horan, John L. Quinn, K. G. Gibbs, S. Gammell, T. N. Nagai, and G. H. Gillanders
Subjects: tev energies, Astrophysics::High Energy Astrophysical Phenomena, sax j0635+0533, Flux, error box, Astrophysics, galactic plane, law.invention, Telescope, surveys, supernova-remnants, galaxies : jets, gamma rays : observations, gamma-ray sources, source 3eg j2227+6122, x-ray, ls i+61-degrees-303, galaxy clusters, Observatory, law, Egret, Astrophysics::Galaxy Astrophysics, Galaxy cluster, Physics, biology, Astronomy, Astronomy and Astrophysics, Galactic plane, biology.organism_classification, Galaxy, Space and Planetary Science
Abstract: The Whipple Observatory 10 m γ-ray telescope has been used to survey the error boxes of EGRET unidentified sources in an attempt to find counterparts at energies of 350 GeV and above. Twenty-one unidentified sources detected by EGRET (more than 10% of the total number) have been included in this survey. In no case is a statistically significant signal found in the EGRET error box, which implies that, at least for this sample, the γ-ray spectra of these sources steepen between 100 MeV and 350 GeV. For each EGRET source location, we list candidate associations and derive upper limits on the integral γ-ray flux above 350 GeV.
Published: 2005

24. Fracture prediction in 4-point bending of an extruded aluminum panel

Author: Tomasz Wierzbicki, L. Zheng, H. Rapp, and D. Petry
Subjects: Engineering, business.industry, Mechanical Engineering, Full scale, Building and Construction, Structural engineering, Bending, Durability, Finite element method, Buckling, Fracture (geology), Composite material, business, Sandwich-structured composite, Beam (structure), Civil and Structural Engineering
Abstract: Currently, the ICE cab cars in Europe are of all-aluminum construction for durability and low weight. Several serious train collisions involving this type of train raised questions about their integrity under accidental loads. A typical aluminum cab car is assembled from extruded aluminum panels, which are MIG welded, forming long seam lines. In this work, crushing characteristics of full scale sandwich panels under a 4-point bending load configuration were studied experimentally and numerically. Tests were run all the way to first fracture which occurred inside buckling induced dimples on the compressive side. The force–deflection response and fracture initiation were predicted by the finite element method and compared with experimental results. The location of the first fracture and the corresponding load was predicted with great accuracy using a newly developed fracture criterion. Based on a simplified beam model, a closed form analytical solution of the force–deflection response for the pre-fracture stage was also developed.
Published: 2005

25. Spectrum of Very High Energy Gamma‐Rays from the blazar 1ES 1959+650 during Flaring Activity in 2002

Author: M. K. Daniel, H. M. Badran, I. H. Bond, P. J. Boyle, S. M. Bradbury, J. H. Buckley, D. A. Carter‐Lewis, M. Catanese, O. Celik, P. Cogan, W. Cui, M. D’Vali, I. de la Calle Perez, C. Duke, A. Falcone, D. J. Fegan, S. J. Fegan, J. P. Finley, L. F. Fortson, J. A. Gaidos, S. Gammell, K. Gibbs, G. H. Gillanders, J. Grube, J. Hall, T. A. Hall, D. Hanna, A. M. Hillas, J. Holder, D. Horan, T. B. Humensky, A. Jarvis, M. Jordan, G. E. Kenny, M. Kertzman, D. Kieda, J. Kildea, J. Knapp, K. Kosack, H. Krawczynski, F. Krennrich, M. J. Lang, S. Le Bohec, E. Linton, J. Lloyd‐Evans, A. Milovanovic, P. Moriarty, D. Muller, T. Nagai, S. Nolan, R. A. Ong, R. Pallassini, D. Petry, B. Power‐Mooney, J. Quinn, M. Quinn, K. Ragan, P. Rebillot, P. T. Reynolds, H. J. Rose, M. Schroedter, G. H. Sembroski, S. P. Swordy, A. Syson, V. V. Vassiliev, S. P. Wakely, G. Walker, T. C. Weekes, and J. Zweerink
Subjects: tev energies, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics, system, techniques : spectroscopic, law.invention, Telescope, project, law, Coincident, bl lacertae objects : individual (1es 1959+650), gamma rays : observations, strong flares, Blazar, Cherenkov radiation, Physics, Spectral index, Range (particle radiation), Astrophysics (astro-ph), Gamma ray, h1426+428, Astronomy and Astrophysics, calibration, radiation, Space and Planetary Science, cherenkov telescopes, markarian-421, High Energy Physics::Experiment, Flare
Abstract: The blazar 1ES 1959+650 was observed in a flaring state with the Whipple 10 m Imaging Atmospheric Cherenkov Telescope during May of 2002. A spectral analysis has been carried out on the data from that time period and the resulting very high energy gamma-ray spectrum ($E \geq 316$ GeV) can be well fit by a power-law of differential spectral index \alpha = 2.78 +/- 0.12_{stat.} +/- 0.21_{sys.}. On June 4th 2002, the source flared dramatically in the gamma-ray range without any coincident increase in the X-ray emission, providing the first unambiguous example of an `orphan' gamma-ray flare from a blazar. The gamma-ray spectrum for these data can also be described by a simple power-law fit with \alpha = 2.82 +/- 0.15_{stat.} +/- 0.30_{sys.}. There is no compelling evidence for spectral variability, or for any cut-off to the spectrum., Comment: 25 pages. Collaboration website at http://veritas.sao.arizona.edu/
Published: 2005

26. VERITAS: the Very Energetic Radiation Imaging Telescope Array System

Author: M. K. Daniel, S. P. Wakely, G. Walker, John Kildea, J. H. Buckley, David Kieda, Mark N. Quinn, A. Jarvis, S. M. Bradbury, S. P. Swordy, A. Milovanovic, Wei Cui, A. Syson, D. Horan, F. Krennrich, M. Schroedter, V. V. Vassiliev, Abraham D. Falcone, G. E. Kenny, H. J. Rose, R. Pallassini, Lucy Fortson, P. J. Boyle, E. Linton, D. S. Hanna, J. A. Gaidos, M. D'Vali, P. Moriarty, S. J. Nolan, M. Jordan, Jeffrey Zweerink, J. Hall, K. Ragan, Tony Hall, J. Knapp, K. Kosack, D. A. Carter-Lewis, D. Petry, J. Lloyd-Evans, Dietrich Müller, G. H. Gillanders, B. Power-Mooney, G. H. Sembroski, Jamie Holder, S. LeBohec, I. de la Calle Perez, I. H. Bond, M. J. Lang, S. J. Fegan, Henric Krawczynski, M. Kertzman, T. N. Nagai, J. Grube, P. Rebillot, P. T. Reynolds, J. P. Finley, C. Duke, T. C. Weekes, D. J. Fegan, John L. Quinn, K. G. Gibbs, R. A. Ong, S. Gammell, A. M. Hillas, and O. Celik
Subjects: Physics, tev energies, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astronomy and Astrophysics, Gamma-ray astronomy, Astrophysics, First light, Cherenkov Telescope Array, law.invention, Telescope, Primary mirror, Space and Planetary Science, law, Observatory, gamma-ray astronomy, atmospheric cherenkov detectors, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Galaxy Astrophysics, Very Energetic, Cherenkov radiation
Abstract: The Very Energetic Radiation Imaging Telescope Array System (VERITAS) is the major next generation imaging atmospheric Cherenkov γ-ray telescope in the western hemisphere and will be located in southern Arizona nearby Kitt Peak National Observatory. The VERITAS observatory will provide unprecedented sensitivity to photon energies between 50 GeV and 50 TeV. The first stage is an array of four telescopes to be fully operational in early 2006, with an expansion to seven telescopes envisioned for 2008. The construction of a prototype telescope is underway, for which first light is expected in Fall 2003. The technical concept is outlined and a progress report is given.
Published: 2004

27. The TeV Spectrum of H1426+428

Author: Vladimir Vassiliev, Dietrich Müller, Jamie Holder, S. M. Bradbury, Frank Krennrich, M. Kertzman, S. J. Fegan, A. M. Hillas, T. N. Nagai, John Kildea, D. J. Fegan, D. Horan, Wei Cui, M. Schroedter, J. Hall, S. Gammell, J. P. Finley, K. Kosack, J. Knapp, C. Duke, D. A. Carter-Lewis, T. C. Weekes, S. P. Swordy, R. A. Ong, Morgan T. Page, R. Sidwell, P. Moriarty, I. H. Bond, S. P. Wakely, S. LeBohec, N. Stanton, B. Power-Mooney, G. Walker, I. de la Calle Perez, D. Petry, Tony Hall, J. H. Buckley, J. A. Gaidos, David Kieda, G. H. Sembroski, R. Pallassini, M. Jordan, Abraham D. Falcone, H. J. Rose, N. W. Reay, John L. Quinn, K. G. Gibbs, and P. T. Reynolds
Subjects: Normalization (statistics), Physics, ray, Astrophysics::High Energy Astrophysical Phenomena, Spectrum (functional analysis), Flux, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Space (mathematics), Power law, objects, Crab Nebula, Space and Planetary Science, bl lacertae objects : individual (h1426+428), gamma rays : observations, High Energy Physics::Experiment, Blazar, BL Lac object
Abstract: The BL Lac object H1426+428 was recently detected as a high energy gamma-ray source by the VERITAS collaboration (Horan et al. 2002). We have reanalyzed the 2001 portion of the data used in the detection in order to examine the spectrum of H1426+428 above 250 GeV. We find that the time-averaged spectrum agrees with a power law of the shape dF/dE = 10^(-7.31 +- 0.15(stat) +- 0.16(syst)) x E^(-3.50 +- 0.35(stat) +- 0.05(syst)) m^(-2)s^(-1)TeV^(-1) The statistical evidence from our data for emission above 2.5 TeV is 2.6 sigma. With 95% c.l., the integral flux of H1426+428 above 2.5 TeV is larger than 3% of the corresponding flux from the Crab Nebula. The spectrum is consistent with the (non-contemporaneous) measurement by Aharonian et al. (2002) both in shape and in normalization. Below 800 GeV, the data clearly favours a spectrum steeper than that of any other TeV Blazar observed so far indicating a difference in the processes involved either at the source or in the intervening space., Comment: LaTeX, 8 pages, 4 figures, accepted for publication in ApJ
Published: 2002

28. HEPATITE AUTOIMUNE EM UMA POPULAÇÃO DE 847 PACIENTES COM LÚPUS ERITEMATOSO SISTÊMICO JUVENIL

Author: B. Montenegro, Eloisa Silva Dutra de Oliveira Bonfa, V. Balbi, Simone Appenzeller, D. Petry, M. T. Terreri, Cláudia Silami de Magalhães, L.P. Coelho, Ana C. Pitta, Katia Kozu, Ana Paula Sakamoto, R. M. R. Pereira, C. A. A. Silva, A.R. Schimidt, Lúcia Maria de Arruda Campos, and Virgínia Paes Leme Ferriani
Subjects: 030203 arthritis & rheumatology, Gynecology, 03 medical and health sciences, medicine.medical_specialty, 0302 clinical medicine, Rheumatology, business.industry, Medicine, 030212 general & internal medicine, business
Published: 2017

29. The human pipeline: distributed data reduction for ALMA

Author: Eric Villard, Crystal L. Brogan, S. Schnee, Baltasar Vila-Vilaro, D. Petry, Shinya Komugi, Daniel Espada, and Elizabeth Humphreys
Subjects: Computer science, business.industry, FOS: Physical sciences, Astrophysics - Instrumentation and Methods for Astrophysics, Raw data, Telecommunications, business, Instrumentation and Methods for Astrophysics (astro-ph.IM), Submillimeter Array, Pipeline (software), Data reduction
Abstract: Users of the Atacama Large Millimeter/submillimeter Array (ALMA) are provided with calibration and imaging products in addition to raw data. In Cycle 0 and Cycle 1, these products are produced by a team of data reduction experts spread across Chile, East Asia, Europe, and North America. This article discusses the lines of communication between the data reducers and ALMA users that enable this model of distributed data reduction. This article also discusses the calibration and imaging scripts that have been provided to ALMA users in Cycles 0 and 1, and what will be different in future Cycles., 7 pages, Proceedings of SPIE in Montreal (2014)
Published: 2014

30. The European ALMA Regional Centre: a model of user support

Author: S. Randall, Anita M. S. Richards, T. W. B. Muxlow, M. Diaz-Trigo, Michiel R. Hogerheijde, E. van Kampen, F. Gueth, Martin Zwaan, Frank Bertoldi, D. Petry, Elizabeth Humphreys, Jan Brand, T. Stanke, Paola Andreani, Evanthia Hatziminaoglou, A. D. Biggs, Felix Stoehr, Miroslav Bárta, and Wouter Vlemmings
Subjects: Service (systems architecture), Successful operation, Preparation stage, business.industry, Central node, Telecommunications, business
Abstract: The ALMA Regional Centres (ARCs) form the interface between the ALMA observatory and the user community from the proposal preparation stage to the delivery of data and their subsequent analysis. The ARCs provide critical services to both the ALMA operations in Chile and to the user community. These services were split by the ALMA project into core and additional services. The core services are financed by the ALMA operations budget and are critical to the successful operation of ALMA. They are contractual obligations and must be delivered to the ALMA project. The additional services are not funded by the ALMA project and are not contractual obligations, but are critical to achieve ALMA full scientific potential. A distributed network of ARC nodes (with ESO being the central ARC) has been set up throughout Europe at the following seven locations: Bologna, Bonn-Cologne, Grenoble, Leiden, Manchester, Ondrejov, Onsala. These ARC nodes are working together with the central node at ESO and provide both core and additional services to the ALMA user community. This paper presents the European ARC, and how it operates in Europe to support the ALMA community. This model, although complex in nature, is turning into a very successful one, providing a service to the scientific community that has been so far highly appreciated. The ARC could become a reference support model in an age where very large collaborations are required to build large facilities, and support is needed for geographically and culturally diverse communities.
Published: 2014

31. ALMA service data analysis and level 2 quality assurance with CASA

Author: D. Petry, Eric Villard, S. Schnee, Shinya Komugi, and Baltasar Vila-Vilaro
Subjects: Service (systems architecture), Computer science, business.industry, Volume (computing), FOS: Physical sciences, Engineering management, Radio observatory, Software, Data quality, business, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Quality assurance, Radio astronomy
Abstract: The Atacama Large mm and sub-mm Array (ALMA) radio observatory is one of the world's largest astronomical projects. After the very successful conclusion of the first observation cycles Early Science Cycles 0 and 1, the ALMA project can report many successes and lessons learned. The science data taken interleaved with commissioning tests for the still continuing addition of new capabilities has already resulted in numerous publications in high-profile journals. The increasing data volume and complexity are challenging but under control. The radio-astronomical data analysis package "Common Astronomy Software Applications" (CASA) has played a crucial role in this effort. This article describes the implementation of the ALMA data quality assurance system, in particular the level 2 which is based on CASA, and the lessons learned., About to be published in the SPIE Astronomical Telescopes and Instrumentation Proceedings of the conference "Software and Cyberinfrastructure for Astronomy III", June 2014, Montreal, Canada, Paper ID 9152-17
Published: 2014

32. Observation of Markarian 421 in TeV gamma rays over a 14-year time span

Author: M. J. Lang, J. Tyler, J. H. Buckley, D. A. Carter-Lewis, E. Collins-Hughes, G. H. Gillanders, S. P. Wakely, Daniel Gall, L. Ciupik, N. Galante, E. Roache, A. N. Otte, H. Krawczynski, T. Reynolds, M. P. Connolly, D. S. Hanna, Ralph Bird, G. Finnegan, Geza Gyuk, K. Ragan, A. W. Smith, C. Duke, A. Pichel, G. H. Sembroski, Lucy Fortson, R. Welsing, Abraham D. Falcone, T. C. Arlen, V. Bugaev, Matthew R. Orr, J. P. Finley, Wei Cui, Y. Khassen, V. A. Acciari, T. Aune, T. C. Weekes, S. M. Bradbury, John Toner, A. C. Rovero, A. Cesarini, A. S. Madhavan, Wystan Benbow, Martin Pohl, John L. Quinn, P. Moriarty, R. A. Ong, K. G. Gibbs, J. Dumm, J. S. Perkins, S. J. Fegan, S. Federici, A. Weinstein, Stephanie Wissel, M. Schroedter, I. de la Calle Perez, A. Varlotta, A. Bouvier, P. Kaaret, J. E. Ward, David Kieda, M. Theiling, Sinéad M. Griffin, M. Kertzman, A. O'Faolain de Bhroithe, D. J. Fegan, T. J. N. Nelson, J. A. Gaidos, David A. Williams, I. Telezhinsky, T. B. Humensky, Julie McEnery, D. Horan, D. Petry, J. Grube, M. Vivier, and F. Krennrich
Subjects: multiwavelength observations, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Active galactic nucleus, Ciencias Físicas, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Flux, Astrophysics, telescope, timing explorer, 01 natural sciences, Spectral line, law.invention, purl.org/becyt/ford/1 [https], Telescope, law, blazar markarian-421, emission, 0103 physical sciences, crab-nebula, flare, AGN, Blazar, tev gamma rays, 010303 astronomy & astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Markarian 421, 010308 nuclear & particles physics, markarian 421, Gamma ray, Astronomy, Institut für Physik und Astronomie, Astronomy and Astrophysics, purl.org/becyt/ford/1.3 [https], TeV gamma rays, Astronomía, Crab Nebula, correlated variability, active galactic nuclei, ddc:540, agn, Astrophysics - High Energy Astrophysical Phenomena, Markarian galaxies, CIENCIAS NATURALES Y EXACTAS, energy, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The variability of the blazar Markarian 421 in TeV gamma rays over a 14-year time period has been explored with the Whipple 10 m telescope. It is shown that the dynamic range of its flux variations is large and similar to that in X-rays. A correlation between the X-ray and TeV energy bands is observed during some bright flares and when the complete data sets are binned on long timescales. The main database consists of 878.4 hours of observation with the Whipple telescope, spread over 783 nights. The peak energy response of the telescope was 400 GeV with 20% uncertainty. This is the largest database of any TeV-emitting active galactic nucleus (AGN) and hence was used to explore the variability profile of Markarian 421. The time-averaged flux from Markarian 421 over this period was 0.446$\pm$0.008 Crab flux units. The flux exceeded 10 Crab flux units on three separate occasions. For the 2000-2001 season the average flux reached 1.86 Crab units, while in the 1996-1997 season the average flux was only 0.23 Crab units., Comment: 29 pages, 15 figures. Accepted for publication in Astroparticle Physics
Published: 2014

33. Cutoff in the T[CLC]e[/CLC]V Energy Spectrum of Markarian 421 during Strong Flares in 2001

Author: H. J. Rose, M. Catanese, M. J. Lang, J. A. Gaidos, I. H. Bond, G. H. Sembroski, J. P. Finley, I. de la Calle Perez, R. A. Ong, John Kildea, T. C. Weekes, B. McKernan, S. LeBohec, S. Dunlea, M. Kertzman, R. Pallassini, A. M. Hillas, R. Sidwell, M. Jordan, Frank Krennrich, J. Knapp, Wei Cui, S. P. Swordy, Dietrich Müller, K. Kosack, N. W. Reay, S. M. Bradbury, Jamie Holder, P. Moriarty, D. A. Carter-Lewis, N. Stanton, H. M. Badran, P. T. Reynolds, Tony Hall, J. H. Buckley, S. P. Wakely, David Kieda, John L. Quinn, K. G. Gibbs, D. J. Fegan, D. Das, Vladimir Vassiliev, D. Horan, S. J. Fegan, D. Petry, and G. H. Gillanders
Subjects: Long lasting, mkn-501, Astrophysics::High Energy Astrophysical Phenomena, hegra, Astrophysics, Power law, objects, blazar, jet, Energy spectrum, Statistical precision, photons, Cutoff, gamma rays : observations, Blazar, Background radiation, Physics, active galaxy markarian-421, Astronomy and Astrophysics, gamma-rays, acceleration, Space and Planetary Science, Spectral energy distribution, High Energy Physics::Experiment, bl lacertae objects : individual (markarian 421), cherenkov telescope system
Abstract: Exceptionally strong and long lasting flaring activity of the blazar Markarian 421 (Mrk 421) occurred between January and March 2001. Based on the excellent signal-to-noise ratio of the data we derive the energy spectrum between 260 GeV - 17 TeV with unprecedented statistical precision. The spectrum is not well described by a simple power law even with a curvature term. Instead the data can be described by a power law with exponential cutoff: $\rm {{dN}\over{dE}} \propto \rm E^{-2.14 \pm 0.03_{stat}} \times e^{-E/E_{0}} m^{-2} s^{-1} TeV^{-1}$ with $\rm E_{0} = 4.3 \pm 0.3_{stat} TeV$. Mrk 421 is the second $\gamma$-ray blazar that unambiguously exhibits an absorption-like feature in its spectral energy distribution at 3-6 TeV suggesting that this may be a universal phenomenon, possibly due to the extragalactic infra-red background radiation.
Published: 2001

34. Performance of a fast low noise front-end preamplifier for the MAGIC imaging Cherenkov telescope

Author: M. Martinez, R. Mirzoyan, G. Blanchot, A. Ostankov, D. Petry, M. Dosil, X. Llopart, Matteo Cavalli-Sforza, W. Pimpl, Martine Bosman, Oscar Blanch, E. Fernandez, and E. Lorenz
Subjects: Physics, Transimpedance amplifier, Nuclear and High Energy Physics, Photomultiplier, Physics::Instrumentation and Detectors, Preamplifier, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, law.invention, Telescope, Optics, Nuclear Energy and Engineering, law, Nuclear electronics, Optoelectronics, MAGIC (telescope), Electrical and Electronic Engineering, business, Cherenkov radiation, Noise (radio)
Abstract: The observation of high energy cosmic gamma rays with an energy threshold of 15 GeV using the proposed MAGIC ground based air imaging Cherenkov telescope requires the development of new low noise fast preamplifiers for the camera photosensors. The speed and noise performance of a transimpedance preamplifier that resolves the multi photoelectron peaks from a hybrid photomultiplier with a peaking time below 7 ns is presented. The new front-end circuit is designed with RF low noise bipolar transistors and provides fast output pulses that allow for fast trigger settings.
Published: 1999

35. [Untitled]

Author: E. Remy, E. Bourgkard, N. Chau, P. Huguenin, J. M. Andre, and D. Petry
Subjects: Orthodontics, medicine.medical_specialty, Correlation coefficient, Dynamometer, Hand injury, Epidemiology, business.industry, Pinch Strength, medicine.disease, medicine.anatomical_structure, Volume (thermodynamics), Hand strength, medicine, Physical therapy, Pinch, Upper limb, business
Abstract: Assessments of oedema and decrease in hand strength are useful for patients with a hand lesion. This study examined the asymmetry of the arms and determined the estimates of the unknown prior to lesion values for hand volume, grip strengths assessed with a Jamar dynamometer (GSJ) and a Collins dynamometer (GSC), and pinch strength with a Jamar pinch gauge (PS) in 100 healthy working people. Hand volume, GSJ, GSC, and PS of the dominant hand were respectively 3.6 ± 4.1%, 6.6 ± 9.2%, 11.7 ± 11.2%, and 8.0 ± 13.2% higher than those of the non-dominant hand (p < 0.001). Very good estimates were obtained with the values of the contralateral arm for all the indices studied. The correlation coefficient equalled 0.95 for hand volume, 0.91 for GSJ, 0.83 for GSC, and 0.72 for PS. These estimates allow us to evaluate the evolution of oedema and hand strengths in patients with hand injury, especially to determine whether they could return to work as they are mostly manual workers with demanding jobs.
Published: 1998

36. On the influence of afterpulsing in PMTs on the trigger threshold of multichannel light detectors in self-trigger mode

Author: R. Mirzoyan, E. Lorenz, D. Petry, and C. Prosch
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, Light flashes, Optics, business.industry, Detector, Night sky, Mode (statistics), Cosmic ray, business, Instrumentation, Cherenkov radiation
Abstract: In some experiments photomultiplier based multichannel detectors are used to measure short light flashes in self-trigger mode in the presence of a significant background illumination. This background can induce a sizeable afterpulse rate. Contrary to published data the afterpulses can have rather large amplitudes and might be interpreted as genuine signals. This is the case with current imaging air Cherenkov telescopes in cosmic ray experiments. We found that due to the simple trigger logic of contemporary telescopes it is not the light of the night sky (LONS), but the afterpulsing which sets the trigger threshold. Afterpulsing features for 5 types of photomultiplier tubes are presented.
Published: 1997

37. [Untitled]

Author: N. Chau, D. Petry, E. Remy, E. Bourgkard, P. Huguenin, and J. M. Andre
Subjects: medicine.medical_specialty, Dynamometer, Epidemiology, business.industry, Work (physics), Pinch Strength, Anthropometry, medicine.anatomical_structure, Hand strength, Linear regression, Physical therapy, Medicine, Upper limb, Multiple correlation, business
Abstract: Edema and hand strength measurements are useful for the recovery assessment of patients with a hand lesion. This work determined and compared estimates of hand volume, grip strengths (measured with a Jamar and a Collins dynamometer), and pinch strength (with a Jamar pinch gauge) in terms of sex and age with or without anthropometric indices in healthy working people. The sample included 100 subjects from within the staffs of two rehabilitation centres. For both grip strengths, multiple linear regression models including body height, weight, and arm muscle area were very good (multiple correlation coefficient R of about 0.84) and clearly better than those obtained with sex and age only. For pinch strength, the best estimate was obtained with sex and arm muscle area (R of 0.76); for hand volume, the model with sex, body height, and weight provided the best result (R of 0.93). These findings suggested that anthropometric indices easy to measure must be taken into account to estimate hand volume and hand strengths.
Published: 1997

38. An optimized method for the reconstruction of the direction of air showers for scintillator arrays

Author: N. Magnussen, R.N. Sooth, S. Martinez, E. Lorenz, R. Eckmann, D. Schmele, José Fernández, I. Holl, H. Kornmeyer, Burkhardt Funk, G. Rauterberg, O. Kirstein, S. Westerhoff, D. Petry, N. Müller, C. Prosch, Wolfgang Rhode, L. Padilla, B. Wiebel-Sooth, Axel Lindner, S.M. Bradbury, M. Samorski, J. Prahl, V. Haustein, T. Deckers, R. Plaga, Abelardo Moralejo, E. Feigl, M. Merck, J. Sanchez, F. Arqueros, W. Stamm, Juan Cortina, V. Fonseca, J. Gebauer, F. Krennrich, M. Willmer, H. Möller, J. C. Gonzalez, Henric Krawczynski, H. Meyer, G. Heinzelmann, and R. Mirzoyan
Subjects: Physics, Nuclear and High Energy Physics, business.industry, Gaussian, Gamma ray, HEGRA, Cosmic ray, Scintillator, Threshold energy, symbols.namesake, Optics, Air shower, symbols, Angular resolution, business, Instrumentation
Abstract: An optimized method is presented for the reconstruction of air shower directions for scintillator arrays. The method takes into account that both the expectation value and the spread of the measured arrival times not only depend on the distance of a counter from the shower axis, but also on the number of particles registered in that counter. It also takes into account that the distributions of the measured arrival times are not Gaussian. For showers recorded with the HEGRA scintillator array above the threshold energy of E thres = 20 TeV the mean angular resolution obtained with this method is 〈 σ 63% θ 〉 = 1.0°, and above the threshold E thres = 50 TeV it is 〈 σ 63% θ 〉 = 0.6°. Comparing the new procedure with the HEGRA standard procedure the angular resolution has improved on average by a factor of 1.33. The mis-pointing has been determined with an accuracy of 0.15°. The method is developed using experimental data.
Published: 1996

39. Stereoscopic imaging of air showers with the first two HEGRA Cherenkov telescopes

Author: M. Hemberger, M. Samorski, A. Kohnle, T. Deckers, German Hermann, N. Müller, M. Heβ, C. Köhler, S.M. Bradbury, R. Mirzoyan, A. Plyasheshnikov, W. Stamm, A. Konopelko, M. Panter, V. Fonseca, José Fernández, A. G. Akhperjanian, C. A. Wiedner, Felix Aharonian, E. Lorenz, H. Wirth, G. Rauterberg, D. Petry, Heinrich J. Völk, M. Ulrich, Werner Hofmann, A. Daum, R. Kankanian, and A. Heusler
Subjects: Physics, Stereoscopic imaging, Physics::Instrumentation and Detectors, Cherenkov detector, Astrophysics::High Energy Astrophysical Phenomena, Monte Carlo method, Astrophysics::Instrumentation and Methods for Astrophysics, HEGRA, Astronomy, Astronomy and Astrophysics, Astrophysics, law.invention, Shower, Crab Nebula, law, Astrophysics::Solar and Stellar Astrophysics, Event (particle physics), Cherenkov radiation
Abstract: With systems of atmospheric Cherenkov telescopes, providing stereo images of air showers, the shower parameters, such as the direction, core location, and height of shower maximum can be determined event by event. Techniques for the reconstruction of air showers are introduced, and are demonstrated using data from the first two HEGRA Cherenkov telescopes. Applied to observations of the Crab nebula, a clear signal is observed; the angular distribution of the excess events is consistent with Monte Carlo simulations of the expected resolution.
Published: 1996

40. Detection of gamma rays above 1 TeV from the Crab Nebula by the second HEGRA imaging atmospheric Cherenkov telescope at La Palma

Author: B. Wiebel-Sooth, O. Kirstein, N. Magnussen, A. Kohnle, R. Plaga, I. Holl, L. Padilla, E. Smarsch, A. Karle, R. Mirzoyan, M. Panter, S.M. Bradbury, Axel Lindner, F. Krennrich, A. G. Akhperjanian, J. Sanchez, Abelardo Moralejo, W. Stamm, Burkhardt Funk, A. Heusler, M. Hemberger, G. Rauterberg, G. Aslanian, F. Arqueros, M. Ulrich, Henric Krawczynski, N. Müller, J. Prahl, D. Schmele, V. Fonseca, José Fernández, T. Deckers, Felix Aharonian, A. Daum, M. Willmer, Werner Hofmann, A. S. Beglarian, H. Wirth, R. N. Sooth, S. Westerhoff, V. Sahakian, S. Martinez, German Hermann, K. Sauerland, D. Petry, M. Samorski, M. Heβ, H. Meyer, Dieter Renker, G. Heinzelmann, C. Köhler, H. Möller, J. C. Gonzalez, W. Greve, R. Kankanian, Heinrich J. Völk, Wolfgang Rhode, M. Merck, C. Prosch, A. Plyasheshnikov, A. Konopelko, Juan Cortina, C. A. Wiedner, and E. Lorenz
Subjects: Physics, Spectral index, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, HEGRA, Flux, Astronomy, Astronomy and Astrophysics, Astrophysics, Cherenkov Telescope Array, law.invention, Telescope, Crab Nebula, law, Cherenkov radiation
Abstract: The results of observations of the Crab Nebula by the second HEGRA imaging atmospheric Cherenkov telescope during the period 1994/1995 are presented. The signal, detected at a level of 10 σ , allows one to estimate the flux and the spectral index of the γ -ray energy spectrum above 1 TeV. The analysis, based on the comparison of measurements with comprehensive Monte Carlo simulations, reveals a γ -ray flux F γ (≥ 1 TeV) ⋍ 8 × 10 −12 photons cm −2 s −1 , and indicates a rather steep integral spectrum in the energy region 1–3 TeV with a power-law index α ⋍ 1.6–1.8.
Published: 1996

41. Identifying putative candidate genes and pathways involved in immune responses to porcine reproductive and respiratory syndrome virus (PRRSV) infection

Author: M, Wysocki, H, Chen, J P, Steibel, D, Kuhar, D, Petry, J, Bates, R, Johnson, C W, Ernst, and J K, Lunney
Subjects: Gene Expression Regulation, Swine, Gene Expression Profiling, Porcine Reproductive and Respiratory Syndrome, Animals, Genetic Variation, Bronchi, Porcine respiratory and reproductive syndrome virus, Lymph Nodes, Lung, Polymerase Chain Reaction, Oligonucleotide Array Sequence Analysis
Abstract: Differences in gene expression were compared between RNAs from lungs of high (HR) and low (LR) porcine reproductive and respiratory syndrome virus (PRRSV) burden pigs using the swine protein-annotated long oligonucleotide microarray, the Pigoligoarray. Pathway analyses were carried out to determine biological processes, pathways and networks that differ between the LR and HR responses. Differences existed between HR and LR pigs for 16 signalling pathways [P0.01/-log (P-value)1.96]. Top canonical pathways included acute phase response signalling, crosstalk between dendritic cells and natural killer cells and tight junction signalling, with numerous immune response genes that were upregulated (SOCS1, SOD2, RBP4, HLA-B, HLA-G, PPP2R1A and TAP1) or downregulated (IL18, TF, C4BPA, C1QA, C1QB and TYROBP). One mechanism, regulation of complement activation, may have been blocked in HR (PRRSV-susceptible) pigs and could account for the poor clearance of PRRSV by infected macrophages. Multiple inhibiting signals may have prevented effective immune responses in susceptible HR pigs, although some protective genes were upregulated in these pigs. It is likely that in HR pigs, expression of genes associated with protection was delayed, so that the immune response was not stimulated early; thus, PRRSV infection prevented protective immune responses.
Published: 2012

42. 4+ Years of Amnog – Clinical Drivers for Successful Dossier Submissions in Oncology

Author: D Petry, J Dehnen, and K Goldhagen
Subjects: medicine.medical_specialty, business.industry, Health Policy, Family medicine, Public Health, Environmental and Occupational Health, medicine, AMNOG, business
Published: 2015

43. Een diagnostische puzzel

Author: M. L. F. J. Bak, H. D. Petry, and W. Schouten
Subjects: Medicine public health, General Medicine, Theology, Psychology
Abstract: Psychiatrische stoornissen komen vaak voor bij mensen met een licht verstandelijke handicap, ofwel zwakbegaafdheid (iq 50-90). Hulpverleners worden bij deze groep mensen dus dikwijls geconfronteerd met een dubbele diagnose. De verschijningsvorm van psychiatrische stoornissen bij licht verstandelijk gehandicapten is bovendien veelal atypisch. Velen van hen hebben leer- en geheugenproblemen, een vertraagde taalontwikkeling en moeilijkheden met het uiten of verwoorden van emoties. Afhankelijk van het niveau van de handicap beschikken zij over beperkte communicatievaardigheden en copingcapaciteiten. Dit leidt tot een verhoogde kwetsbaarheid voor stoornissen in de regulatie van angst, stemming, realiteitszin en agressie. De psychiatrische symptomatologie is daardoor veelal atypisch en de diagnostiek van psychiatrische stoornissen behoeft bij mensen met een licht verstandelijke handicap specifieke kennis en kunde vanuit de psychiatrie en pedagogiek. Aan de hand van een casus verduidelijken we de problematiek van de diagnostiek van psychiatrische stoornissen bij deze groep gehandicapten. Het gaat om een jongeman met een licht verstandelijke handicap zonder genetische of cerebrale oorzaak. We leggen de nadruk op de interactie tussen mentale handicap en psychiatrische stoornis.
Published: 2001

44. Erratum: 'veritas observations of a very high energy γ-ray flare from the blazar 3c 66a' (2009, apj, 693, l104)

Author: A. Varlotta, John Kildea, M. J. Lang, M. Beilicke, Wystan Benbow, Henric Krawczynski, R. G. Wagner, J. P. Finley, Lucy Fortson, Matthew Wood, A. Cannon, Martin Pohl, G. H. Sembroski, D. Pandel, Yousaf M. Butt, J. A. Toner, N. Karlsson, M. McCutcheon, A. McCann, C. M. Hui, T. C. Weekes, R. Dickherber, P. Moriarty, E. Hays, J. Grube, L. Ciupik, J. S. Perkins, Thomas Brian Humensky, V. Bugaev, V. A. Acciari, Stephanie Wissel, Geza Gyuk, David A. Williams, E. Aliu, Y. C. Chow, Reshmi Mukherjee, D. Horan, Amanda Weinstein, David Kieda, R. Guenette, M. K. Daniel, R. A. Ong, M. Kertzman, D. Petry, B. Zitzer, Gernot Maier, K. Ragan, S. M. Bradbury, P. Fortin, H. J. Rose, A. Konopelko, Markus Böttcher, S. LeBohec, P. Kaaret, S. P. Wakely, G. H. Gillanders, S. Godambe, S. P. Swordy, S. J. Fegan, Daniel Gall, O. Celik, D. Steele, F. Pizlo, Karen Byrum, D. S. Hanna, T. C. Arlen, M. Schroedter, A. Imran, Jamie Holder, J. E. Ward, Wei Cui, A. Cesarini, A. N. Otte, John L. Quinn, A. W. Smith, J. Millis, K. G. Gibbs, E. Roache, A. D. Falcone, P. Cogan, Luis C. Reyes, Vladimir Vassiliev, Amy Furniss, Tulun Ergin, F. Krennrich, M. Theiling, J. H. Buckley, P. T. Reynolds, and T. Nagai
Subjects: Physics, High energy, Space and Planetary Science, law, Astronomy, Astronomy and Astrophysics, Astrophysics, Blazar, Flare, law.invention
Published: 2010

45. Soft gamma-ray sources detected by INTEGRAL

Author: Hubert Halloin, D. Petry, Andrew W. Strong, Volker Beckmann, APC - Astrophysique des Hautes Energies (APC - AHE), AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Dipartimento di Astronomia, Universita degli Studi di Bologna, Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO)-Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), APC - Cosmologie, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Max-Planck-Institut für Extraterrestrische Physik (MPE), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Dipartimento di Astronomia, Universita degli Studi di Bologna, Università di Bologna [Bologna] (UNIBO)-Università di Bologna [Bologna] (UNIBO), Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Systematic error, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), [PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], 010504 meteorology & atmospheric sciences, Field (physics), [SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Flux, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, 01 natural sciences, Spectral line, Space and Planetary Science, 0103 physical sciences, Range (statistics), Cutoff, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, Source model, 0105 earth and related environmental sciences
Abstract: We aim to exploit the available INTEGRAL/SPI data to provide time-averaged spectra of the brightest soft gamma-ray sources. Employing a maximum-likelihood fit technique for our SPI data analysis, we take as input to our source model the source catalog derived by Bouchet et al. (2008) from a SPI all-sky study. We use the first four years of public SPI data and extract spectra between 25 keV and 1 MeV for the 20 catalog sources detected by Bouchet et al. at 200 - 600 keV with >= 2.5 sigma. In order to verify our analysis, we also extract spectra for the same sources from the corresponding INTEGRAL/ISGRI data. We fit adequate spectral models to the energy range 25-1000 keV for SPI and 25-600 keV for ISGRI. We use our spectra from the Crab (which is among the 20 sources studied here) and an empty location in a crowded field to derive an estimation of the systematic errors. The agreement between our SPI and ISGRI measurements is good if we normalise them on the Crab spectrum. Our SPI flux measurements also agree well with those by Bouchet et al. (2008). All 20 sources in our sample are detected independently in the bands 25-100 keV and 100-200 keV. At 200-600 keV we detect eight sources, at 600-1000 keV we detect two sources. Our spectra agree well with the results from previous publications where available. For six of the 14 XRBs in our sample we find evidence for a hard powerlaw-component which becomes dominant above the cutoff energy of the thermal Comptonization component. In two of these cases, our study provides the first indication of such emission. For the others, our results confirm previous studies. Our Crab spectrum (from 1.3 Ms exposure), shows a significant flux in all points and is well described by a powerlaw with a break near 100 keV and spectral indices 2.11 and 2.20., 24 pages, 44 figures, accepted for publication by A&A
Published: 2009
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46. Monazite Coatings on Nextel 720™, 610™, and Tyranno-Sa Fiber Tows; Effects of Precursors on Fiber Strength

Author: Emmanuel E. Boakye, Randall S. Hay, L. M. Douglas, and M. D. Petry
Subjects: Materials science, Fiber coating, Monazite, Fiber strength, Fiber, Composite material
Published: 2008

47. Processing, Microstructure, and Properties of Al2O3 -Y3Al5O12 (YAG) Eutectic Fibers

Author: L. E. Matson, M. D. Petry, Tai-Il Mah, and T. A. Parthasarathy
Subjects: Materials science, Composite material, Microstructure, Eutectic system
Published: 2008

48. Porous Aluminum Oxide and Lanthanum Phosphate Fiber Coatings

Author: M. D. Petry and E. Boakye
Subjects: Materials science, Chemical engineering, Inorganic chemistry, Fiber, Porosity, Aluminum oxide, Lanthanum phosphate
Published: 2008

49. Sol-Gel Synthesis of Zircon-Carbon Precursors and Coatings of Nextel 720™ Fiber Tows

Author: Randall S. Hay, Emmanuel E. Boakye, Melvin D. Petry, and Triplicane A. Parthasarathy
Subjects: chemistry.chemical_compound, Hydrolysis, Materials science, chemistry, Chemical engineering, Boron nitride, Inorganic chemistry, chemistry.chemical_element, Fiber, Carbon, Zircon, Sol-gel
Published: 2008

50. Grain Growth and Tensile Strength of 3M Nextel 720™ After Thermal Exposure

Author: Y. Berta, J. Welch, K. Von Lehmden, M. D. Petry, Randall S. Hay, and E. E. Boakye
Subjects: Grain growth, Materials science, Ultimate tensile strength, Thermal, Degradation (geology), Crystallite, Composite material
Published: 2008

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