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B→Dℓνform factors at nonzero recoil and|Vcb|from2+1-flavor lattice QCD
Bailey, Jon A.,Bazavov, A.,Bernard, C.,Bouchard, C. M.,DeTar, C.,Du, Daping,El-Khadra, A. X.,Foley, J.,Freeland, E. D.,Gá,miz, E.,Gottlieb, Steven,Heller, U. M.,Komijani, J.,Kronfeld, A. S.,Laih American Physical Society 2015 PHYSICAL REVIEW D - Vol.92 No.3
Why pest management needs behavioral ecology and vice versa
Bernard D. ROITBERG 한국곤충학회 2007 Entomological Research Vol.37 No.1
Behavior manipulation is becoming an accepted tactic in pest management, however, there are many ways in which the approach can be improved. In this review, I explain how and why insect behavioral response to various stimuli can vary dramatically under different conditions and that it is this variable response that must be understood before behavior manipulation becomes widely accepted in pest management programs. I propose that entomologists use concepts from behavioral ecology to manipulate pest behavior in a predictable manner. The key is to study behaviors that maximize fitness in natural environments and then exploit these behaviors in agriculture. I provide examples from a range of behavior manipulation tactics, including use of attracticides, kairomone-mediated biological control, use of marking pheromones, and push-pull manipulation.
D. Bernard,D. G. Hattingh,W. E. Goosen,M. N. James 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.8
This paper reports the results of an investigation of thermal cycles and microstructural development in 5182-H111 aluminiumalloy during low speed (0.2 m/min) and high speed (1.5 m/min) friction stir welding (FSW), using quenched pin-break specimens. The results show that welds made at both speeds have excellent mechanical properties, although these derive fromdifferent thermomechanical mechanisms. For the low speed weld thermal conductivity plays the most significant role in thedevelopment of microstructure, while in the case of high speed welding it is the high strain rate plastic deformation that isthe dominant mechanism. The yield strength in the stir zone of both the 0.2 m/min and 1.5 m/min welds could be explainedthrough the Hall–Petch relationship, leading to an observable increase in the case of the 1.5 m/min weld. By contrast, anincrease in yield strength beneath the shoulder of the 1.5 m/min weld was driven by strain hardening.
D. Bernard,P. Leconte,A. Gruel,M. Antony,A. Pepino,J. Di Salvo,A. Lecluze,J-F. Ledoux,C. Morel,B. Sabatin 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The CEA is deeply involved in a research program (Material Test Reactor and Zero Power Reactor) concerning the nuclear fuel advanced studies (actinides, plutonium), the waste management, the scientific and technical support of French PWR reactors and EPR reactor, and innovative systems. In this framework, specific neutron integral experiments have been carried out in the critical ZPR facilities of the CEA Cadarache such as MINERVE, EOLE and MASURCA. This paper deals with MINERVE Pool Reactor experiments. MINERVE is mainly devoted to neutronics studies of different reactor core types. The aim is to improve the knowledge of the integral absorption cross sections of actinides (OSMOSE program). The results show a very good accuracy of JEFF-3.1.1 files except for <sup>241</sup>Am(n,γ) which seems to be underestimated by about (-6± 2)% in the thermal and epithermal neutron energy range.
Akerib, D.S.,Akerlof, C.W.,Akimov, D.Yu.,Alsum, S.K.,Araú,jo, H.M.,Arnquist, I.J.,Arthurs, M.,Bai, X.,Bailey, A.J.,Balajthy, J.,Balashov, S.,Barry, M.J.,Belle, J.,Beltrame, P.,Benson, T.,Bernard North-Holland 2017 Astroparticle physics Vol.96 No.-
<P>The LUX-ZEPLIN (LZ) experiment will search for dark matter particle interactions with a detector containing a total of 10 tonnes of liquid xenon within a double -vessel cryostat. The large mass and proximity of the cryostat to the active detector volume demand the use of material with extremely low intrinsic radioactivity. We report on the radioassay campaign conducted to identify suitable metals, the determination of factors limiting radiopure production, and the selection of titanium for construction of the LZ cryostat and other detector components. This titanium has been measured with activities of U-238(e) < 1.6 mBq/kg, U-238(I) < 0.09 mBq/kg, Th-232(e) = 0.28 +/- 0.03 mBq/kg, Th-232(I) = 0.25 +/- 0.02 mBq/kg, K-40 <0.54 mBq/kg, and (60) Co <0.02 mBq/kg (68% CL). Such low intrinsic activities, which are some of the lowest ever reported for titanium, enable its use for future dark matter and other rare event searches. Monte Carlo simulations have been performed to assess the expected background contribution from the LZ cryostat with this radioactivity. In 1,000 days of WIMP search exposure of a 5.6-tonne fiducial mass, the cryostat will contribute only a mean background of 0.160 +/- 0.001(stat) +/- 0.030(sys) counts. (C) 2017 Elsevier B.V. All rights reserved.</P>
|Vub|fromB→πℓνdecays and (2+1)-flavor lattice QCD
Bailey, Jon. A.,Bazavov, A.,Bernard, C.,Bouchard, C. M.,DeTar, C.,Du, D.,El-Khadra, A. X.,Foley, J.,Freeland, E. D.,Gá,miz, E.,Gottlieb, Steven,Heller, U. M.,Komijani, J.,Kronfeld, A. S.,Laiho, American Physical Society 2015 PHYSICAL REVIEW D - Vol.92 No.1
Update of|Vcb|from theB¯→D*ℓν¯form factor at zero recoil with three-flavor lattice QCD
Bailey, Jon A.,Bazavov, A.,Bernard, C.,Bouchard, C. M.,DeTar, C.,Du, Daping,El-Khadra, A. X.,Foley, J.,Freeland, E. D.,Gá,miz, E.,Gottlieb, Steven,Heller, U. M.,Kronfeld, A. S.,Laiho, J.,Levkova American Physical Society 2014 PHYSICAL REVIEW D - Vol.89 No.11
B→Kl+l−decay form factors from three-flavor lattice QCD
Bailey, Jon A.,Bazavov, A.,Bernard, C.,Bouchard, C. M.,DeTar, C.,Du, Daping,El-Khadra, A. X.,Foley, J.,Freeland, E. D.,Gá,miz, E.,Gottlieb, Steven,Heller, U. M.,Jain, R. D.,Komijani, J.,Kronfeld American Physical Society 2016 Physical Review D Vol.93 No.2
<P>We compute the form factors for the B --> Kl(+)l(-) semileptonic decay process in lattice QCD using gauge-field ensembles with 2 + 1 flavors of sea quark, generated by the MILC Collaboration. The ensembles span lattice spacings from 0.12 to 0.045 fm and have multiple sea-quark masses to help control the chiral extrapolation. The asqtad improved staggered action is used for the light valence and sea quarks, and the clover action with the Fermilab interpretation is used for the heavy b quark. We present results for the form factors f(+)(q(2)), f(0)(q2), and f(T)(q2), where q(2) is the momentum transfer, together with a comprehensive examination of systematic errors. Lattice QCD determines the form factors for a limited range of q(2), and we use the model-independent z expansion to cover the whole kinematically allowed range. We present our final form-factor results as coefficients of the z expansion and the correlations between them, where the errors on the coefficients include statistical and all systematic uncertainties. We use this complete description of the form factors to test QCD predictions of the form factors at high and low q(2).</P>
특집_제25회 한국원자력연차대회 - 증기발생기 화학 세정
D'Annucci, Filippo,Mutius, Bernard 한국원자력산업회의 2010 원자력산업 Vol.30 No.3
증기발생기 2차측 상태는 발전소 운영에 있어 중요한 역할을 수행한다. 기기, 배관 및 열교환기에서 발생되는 침적물은 증기발생기 튜브의 부식 원인이 될 수 있으며, 튜브와 튜브 지지판 사이의 공간을 차단한다. 2차측 침적물에 의한 튜브 파손으로 인해 일부 발전소에서는 강제적으로 발전을 정지하는 사례가 발생하였다. 또한 튜브 지지판의 침적물 축적으로 인해 정상 운전 동안 전력 생산을 감소하게 되는 결과를 초래한 발전소도 있었다. 따라서 증기발생기 2차측 상태 감시와 더불어 증기발생기 부품의 청결 유지는 필수 항목이라 할 수 있다. 웨스팅하우스에서는 증기발생기를 초기 제작 상태로 복구하고 2차측 침적물을 제거하기 위해 EPRI SGOG 증기발생기 화학 세정을 수 년간 이용하고 있다. 본고는 35개 이상의 발전소에서 성공적으로 이용하고 있는 화학 세정 프로세스 개요 및 프로세스를 적용하면서 취득한 경험을 요약한 것이다.