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Search Results: 1 - 10 of 50522 matches for " Y. Kolomensky "
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Configuration Database for BaBar On-line
R. Bartoldus,G. Dubois-Felsmann,Y. Kolomensky,A. Salnikov
Computer Science , 2003,
Abstract: The configuration database is one of the vital systems in the BaBar on-line system. It provides services for the different parts of the data acquisition system and control system, which require run-time parameters. The original design and implementation of the configuration database played a significant role in the successful BaBar operations since the beginning of experiment. Recent additions to the design of the configuration database provide better means for the management of data and add new tools to simplify main configuration tasks. We describe the design of the configuration database, its implementation with the Objectivity/DB object-oriented database, and our experience collected during the years of operation.
First Measurement of the CP-Violating Asymmetries with BABAR
Yury G. Kolomensky
Statistics , 2001, DOI: 10.1142/S0217751X01007601
Abstract: We report on a preliminary measurement of time-dependent CP-violating asymmetries in B0 --> J/psi K0S and B0 --> psi(2S) K0S decays recorded by the BABAR detector at the PEP-II asymmetric B Factory at SLAC. The data sample consisted of 9.0 fb-1 collected at the Y(4S) resonance and 0.8 fb-1 off-resonance. One of the pair of neutral B mesons produced at the Y(4S) was fully reconstructed, while the flavor of the other neutral B meson was tagged at the time of its decay. The value of the asymmetry amplitude, sin(2beta), was determined from a maximum likelihood fit to the time distribution of 120 tagged candidates to be sin(2beta) = 0.12 +- 0.37 (stat.) +- 0.09 (syst.) (preliminary).
Prognostic and Predictive Value of Pretreatment Derived Neutrophil-to-Lymphocyte Ratio in Non-Small-Cell Lung Cancer Patients Treated with an Immune Checkpoint Inhibitor  [PDF]
John Kucharczyk, Caitlin Sullivan, Jonathan Lu, Andrew Kolomensky, Edward Peters, Marc R. Matrana
Journal of Cancer Therapy (JCT) , 2018, DOI: 10.4236/jct.2018.91004
Abstract: Background: Immune checkpoint inhibitors produce prolonged responses in select non-small cell lung cancer (NSCLC) patients, however the identification of patients most likely to benefit is difficult. Pretreatment derived neutrophil-to-lymphocyte ratio (dNLR) is an easily calculated marker available in routine clinical care that has shown prognostic value in many cancer treatment settings, but its association with survival in NSCLC patients treated with immune-checkpoint inhibitors is less understood. Patients and Methods: We retrospectively reviewed 72 NSCLC patients receiving either nivolumab or pembrolizumab between 3/1/15 and 3/1/17 with a median follow-up time of 5.1 months. Patients were compared using Cox proportional hazards models to detect an association between pretreatment dNLR < 3 vs ≥3 on overall survival (OS), progression-free survival (PFS) and overall response rate. Results: Median age was 65 (range: 41 - 86), 65% were male, 40% received ≥ 2 prior systemic therapies and 14% had an Eastern Cooperative Oncology Group Performance Status (ECOG PS) ≥ 2. Pretreatment dNLR 3 was independently associated with shortened OS (median 3.6 vs 8.5 months; HR: 5.4; 95%
Production of high purity TeO2 single crystals for the study of neutrinoless double beta decay
C. Arnaboldi,C. Brofferio,A. Bryant,C. Bucci,L. Canonica,S. Capelli,M. Carrettoni,M. Clemenza,I. Dafinei,S. Di Domizio,F. Ferroni,E. Fiorini,Z. Ge,A. Giachero,L. Gironi,A. Giuliani,P. Gorla,E. Guardincerri,R. Kadel,K. Kazkaz,L. Kogler,Y. Kolomensky,J. Larsen,M. Laubenstein,Y. Li,C. Maiano,M. Martinez,R. Maruyama,S. Nisi,C. Nones,Eric B. Norman,A. Nucciotti,F. Orio,L. Pattavina,M. Pavan,G. Pessina,S. Pirro,E. Previtali,C. Rusconi,Nicholas D. Scielzo,M. Sisti,Alan R. Smith,W. Tian,M. Vignati,H. Wang,Y. Zhu
Physics , 2010, DOI: 10.1016/j.jcrysgro.2010.06.034
Abstract: High purity TeO2 crystals are produced to be used for the search for the neutrinoless double beta decay of 130Te. Dedicated production lines for raw material synthesis, crystal growth and surface processing were built compliant with radio-purity constraints specific to rare event physics experiments. High sensitivity measurements of radio-isotope concentrations in raw materials, reactants, consumables, ancillaries and intermediary products used for TeO2 crystals production are reported. Production and certification protocols are presented and resulting ready-to-use TeO2 crystals are described.
CeLAND: search for a 4th light neutrino state with a 3 PBq 144Ce-144Pr electron antineutrino generator in KamLAND
A. Gando,Y. Gando,S. Hayashida,H. Ikeda,K. Inoue,K. Ishidoshiro,H. Ishikawa,M. Koga,R. Matsuda,S. Matsuda,T. Mitsui,D. Motoki,K. Nakamura,Y. Oki,M. Otani,I. Shimizu,J. Shirai,F. Suekane,A. Suzuki,Y. Takemoto,K. Tamae,K. Ueshima,H. Watanabe,B. D. Xu,S. Yamada,Y. Yamauchi,H. Yoshida,M. Cribier,M. Durero,V. Fischer,J. Gaffiot,N. Jonqueres,A. Kouchner,T. Lasserre,D. Leterme,A. Letourneau,D. Lhuillier,G. Mention,G. Rampal,L. Scola,Ch. Veyssiere,M. Vivier,P. Yala,B. E. Berger,A. Kozlov,T. Banks,D. Dwyer,B. K. Fujikawa,K. Han,Yu. G. Kolomensky,Y. Mei,T. O'Donnell,P. Decowski,D. M. Markoff,S. Yoshida,V. N. Kornoukhov,T. V. M. Gelis,G. V. Tikhomirov,J. G. Learned,J. Maricic,S. Matsuno,R. Milincic,H. J. Karwowski,Y. Efremenko,A. Detwiler,S. Enomoto
Physics , 2013,
Abstract: The reactor neutrino and gallium anomalies can be tested with a 3-4 PBq (75-100 kCi scale) 144Ce-144Pr antineutrino beta-source deployed at the center or next to a large low-background liquid scintillator detector. The antineutrino generator will be produced by the Russian reprocessing plant PA Mayak as early as 2014, transported to Japan, and deployed in the Kamioka Liquid Scintillator Anti-Neutrino Detector (KamLAND) as early as 2015. KamLAND's 13 m diameter target volume provides a suitable environment to measure the energy and position dependence of the detected neutrino flux. A characteristic oscillation pattern would be visible for a baseline of about 10 m or less, providing a very clean signal of neutrino disappearance into a yet-unknown, sterile neutrino state. This will provide a comprehensive test of the electron dissaperance neutrino anomalies and could lead to the discovery of a 4th neutrino state for Delta_m^2 > 0.1 eV^2 and sin^2(2theta) > 0.05.
White paper: CeLAND - Investigation of the reactor antineutrino anomaly with an intense 144Ce-144Pr antineutrino source in KamLAND
A. Gando,Y. Gando,S. Hayashida,H. Ikeda,K. Inoue,K. Ishidoshiro,H. Ishikawa,M. Koga,R. Matsuda,S. Matsuda,T. Mitsui,D. Motoki,K. Nakamura,Y. Oki,M. Otani,I. Shimizu,J. Shirai,F. Suekane,A. Suzuki,Y. Takemoto,K. Tamae,K. Ueshima,H. Watanabe,B. D. Xu,S. Yamada,Y. Yamauchi,H. Yoshida,T. Banks,B. E. Berger,M. Cribier,P. Decowski,J. A. Detwiler,M. Durero,D. Dwyer,Y. Efremenko,S. Enomoto,V. Fischer,B. K. Fujikawa,J. Gaffiot,V. M. Gelis,H. J. Karwowski,Yu. G. Kolomensky,A. Kozlov,V. N. Kornoukhov,T. Lasserre,J. G. Learned,A. Letourneau,D. Lhuillier,J. Maricic,D. M. Markoff,S. Matsuno,G. Mention,R. Milincic,T. ODonnell,I. S. Saldikov,L. Scola,G. V. Tikhomirov,Ch. Veyssiere,M. Vivier,S. Yoshida
Physics , 2013,
Abstract: We propose to test for short baseline neutrino oscillations, implied by the recent reevaluation of the reactor antineutrino flux and by anomalous results from the gallium solar neutrino detectors. The test will consist of producing a 75 kCi 144Ce - 144Pr antineutrino source to be deployed in the Kamioka Liquid Scintillator Anti-Neutrino Detector (KamLAND). KamLAND's 13m diameter target volume provides a suitable environment to measure energy and position dependence of the detected neutrino flux. A characteristic oscillation pattern would be visible for a baseline of about 10 m or less, providing a very clean signal of neutrino disappearance into a yet-unknown, "sterile" state. Such a measurement will be free of any reactor-related uncertainties. After 1.5 years of data taking the Reactor Antineutrino Anomaly parameter space will be tested at > 95% C.L.
A Test Facility for the International Linear Collider at SLAC End Station A, for Prototypes of Beam Delivery and IR Components
M. Woods,R. Erickson,J. Frisch,C. Hast,R. K. Jobe,L. Keller,T. Markiewicz,T. Maruyama,D. McCormick,J. Nelson,T. Nelson,N. Phinney,T. Raubenheimer,M. Ross,A. Seryi,S. Smith,Z. Szalata,P. Tenenbaum,M. Woodley,D. Angal-Kalinin,C. Beard,C. Densham,J. Greenhalgh,F. Jackson,A. Kalinin,F. Zimmermann,I. Zagorodnov,Y. Sugimoto,S. Walston,D. Burton,J. Smith,N. Shales,A. Sopczak,R. Tucker,R. Barlow,G. Kurevlev,A. Mercer,M. Hildreth,P. Burrows,G. Christian,C. Clarke,A. Hartin,S. Molloy,G. White,W. Mueller,T. Weiland,N. Watson,D. Bailey,D. Cussans,Y. Kolomensky,M. Slater,M. Thomson,D. Ward,S. Boogert,A. Liapine,S. Malton,D. J. Miller,M. Wing,R. Arnold,N. Sinev,E. Torrence
Physics , 2005,
Abstract: The SLAC Linac can deliver damped bunches with ILC parameters for bunch charge and bunch length to End Station A. A 10Hz beam at 28.5 GeV energy can be delivered there, parasitic with PEP-II operation. We plan to use this facility to test prototype components of the Beam Delivery System and Interaction Region. We discuss our plans for this ILC Test Facility and preparations for carrying out experiments related to collimator wakefields and energy spectrometers. We also plan an interaction region mockup to investigate effects from backgrounds and beam-induced electromagnetic interference.
A New Paradigm for Metallic Alloys in Materials Science  [PDF]
Y. Ustinovshikov
Advances in Materials Physics and Chemistry (AMPC) , 2015, DOI: 10.4236/ampc.2015.57025
Abstract: In the article, taking into account the phase transition “ordering-phase separation” discovered in alloys, new concepts about the diffusion phase transformations in alloys are formulated: chemical interaction between dissimilar atoms exists always in all alloys and at any temperature of heating; alloys offer a surprising and not previously known property of changing the sign of the chemical interaction between dissimilar atoms at a change of the temperature or composition of alloys; diffusion processes occurring in alloys at different temperatures depend on the sign and the absolute magnitude of the energy of the chemical interaction between dissimilar atoms. All these three concepts are analyzed in detail, by the example of Ni-based and Co-based binary alloys using experimental results obtained by transmission electron microscopy. It is shown, on these ideas, how to carry out heat treatment of alloys more rationally, what principles should underpinned in the base of the construction of phase diagrams, how the microstructures of ordering and phase separation affect some properties of alloys.
Design and Performance of a Custom ASIC Digitizer for Wire Chamber Readout in 65 nm CMOS Technology
MyeongJae Lee,David N. Brown,Jessica K. Chang,Dawei Ding,Dario Gnani,Carl R. Grace,John A. Jones,Yury G. Kolomensky,Henrik von der Lippe,Patrick J. Mcvittie,Matthew W. Stettler,Jean-Pierre Walder
Physics , 2015,
Abstract: We present the design and performance of a prototype ASIC digitizer for integrated wire chamber readout, implemented in 65 nm commercial CMOS technology. Each channel of the 4-channel prototype is composed of two 16-bit Time-to-Digital Converters (TDCs), one 8-bit Analog-to-Digital Converter (ADC), a front-end preamplifier and shaper, plus digital and analog buffers that support a variety of digitization chains. The prototype has a multiplexed digital backend that executes a state machine, distributes control and timing signals, and buffers data for serial output. Laboratory bench tests measure the absolute TDC resolution between 74 ps and 480 ps, growing with the absolute delay, and a relative time resolution of 19 ps. Resolution outliers due to cross-talk between clock signals and supply or reference voltages are seen. After calibration, the ADC displays good linearity and noise performance, with an effective number of bits of 6.9. Under normal operating conditions the circuit consumes 32 mW per channel. Potential design improvements to address the resolution drift and tails are discussed.
White Paper: Measuring the Neutrino Mass Hierarchy
R. N. Cahn,D. A. Dwyer,S. J. Freedman,W. C. Haxton,R. W. Kadel,Yu. G. Kolomensky,K. B. Luk,P. McDonald,G. D. Orebi Gann,A. W. P. Poon
Physics , 2013,
Abstract: This white paper is a condensation of a report by a committee appointed jointly by the Nuclear Science and Physics Divisions at Lawrence Berkeley National Laboratory (LBNL). The goal of this study was to identify the most promising technique(s) for resolving the neutrino mass hierarchy. For the most part, we have relied on calculations and simulations presented by the proponents of the various experiments. We have included evaluations of the opportunities and challenges for these experiments based on what is available already in the literature.
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