5,113 research outputs found
A modelling study of the atmospheric chemistry of DMS using the global model STOCHEM-CRI
No full textThe tropospheric chemistry of dimethylsulfide (DMS) is investigated using a global three-dimensional chemical transport model, STOCHEM with the CRIv2-R5 chemistry scheme. The tropospheric distribution of DMS and its removal at the surface by OH abstraction, OH addition, NO3 oxidation, and BrO oxidation is modelled. The study shows that the lifetime and global burden of DMS is ca. 1.2 days and 98 Gg S, respectively. Inclusion of BrO oxidation resulted in a reduction of the lifetime (1.0 day) and global burden (83 Gg S) of DMS showing that this reaction is important in the DMS budget. The percentage contribution of BrO oxidation to the total removal of DMS is found to be only 7.9% that is considered a lower limit because the study does not include an inorganic source of bromine from sea-salt. BrO oxidation contributed significantly in the high latitudes of the southern hemisphere (SH). Inclusion of DMS removal by Cl2 showed that potentially a large amount of DMS is removed via this reaction specifically in the remote SH oceans, depending on the flux of Cl2 from the Southern Ocean. Model DMS levels are evaluated against measurement data from six different sites around the globe. The model predicted the correct seasonal cycle for DMS at all locations and correlated well with measurement data for most of the periods
South Africa and political change : an analysis of selected studies of South African politics
No full textBibliography: p. 217-229.To a political scientist the challenge.is irresistible of trying to explain and understand a conflict society which is generally characterised in the world as historically anachronistic, politically untenable, economically wasteful and morally unacceptable. It is common cause that South Africa will change. What are the likely ways in which the conflict will be resolved, and which is most likely? These are the questions to which this thesis will attempt to provide answers: it is an effort to determine, as far as possible, the nature, direction and pace of change in South Africa, as seen by a selected group of recent studies of South African politics. The method will be to test the validity of the respective positions on this and related issues embedded in the selected studies of South African politics. Part II, the major part of the work, therefore, is an examination of the explicit or implicit assumptions and values, the conceptual and theoretical frameworks, the use of evidence, the existence of counter evidence, the omissions, inconsistencies and conclusions of various studies of South Africa, in order to assess the strengths and weaknesses of each as explanations of the political, social and economic process. In the course of the examination, an alternative analysis of the issues will be presented and defended. A synopsis of the analysis will be given in Part III. This will be used as a means for testing the analyses of the selected studies, before selecting what is valid in all of them in terms of providing possible answers to the questions posed about the resolution of conflict
Measurement of exclusive p(+)p(-) production in mid-virtuality two-photon interactions and study of the yy* -\u3e pp process at LEP
No full textExclusive p(+)p(-) production in two-photon collisions between a quasi-real photon, gamma, and a mid-virtuality photon, gamma*, is studied with data collected at LEP at centre-of-mass energies 183 GeV \u3c= root s- \u3c= 209 GeV with a total integrated luminosity of 684.8 pb(-1). The cross section of the gamma gamma* -\u3e p(+)p(-) process is determined as a function of the photon virtuality, Q(2), and the two-photoncentre-of-mass energy, W-gamma gamma, in thekinernatic region: 0.2 GeV2 \u3c Q(2) \u3c 0.85 GeV2 and 1.1 GeV \u3c W gamma gamma \u3c 3 GeV. These results, together with previous L-3 measurements of p(0) p(0) and p(+) to p(-) production, allow a study of the gamma gamma* -\u3e pp process over the Q(2)-region 0.2 GeV2 \u3c= Q(2) \u3c= 30 GeV2. (c) 2005 Published by Elsevier B.V
Probing color coherence effects in pp collisions at √s = 7 TeV
No full textOpen Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the
source are credited. Funded by SCOAP3 / License Version CC BY 4.0.A study of color coherence effects in pp collisions at a center-of-mass energy of 7TeV is presented. The data used in the analysis were collected in 2010 with the CMS detector at the LHC and correspond to an integrated luminosity of 36 pb-1. Events are selected that contain at least three jets and where the two jets with the largest transverse momentum exhibit a back-to-back topology. The measured angular correlation between the second- and third-leading jet is shown to be sensitive to color coherence effects, and is compared to the predictions of Monte Carlo models with various implementations of color coherence. None of the models describe the data satisfactorily.BMWF and FWF (Austria); FNRS and FWO(Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil);MES
(Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF(Cyprus); MoER, SF0690030s09 and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland);
CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of
Korea); LAS (Lithuania); CINVESTAV, CONACYT, SEP, andUASLPFAI (Mexico); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS and RFBR(Russia);MESTD (Serbia); SEIDI and CPAN(Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEPCenter, IPST, STAR and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA)
Suppression of non-prompt J/ψ, prompt J/ψ, and Y(1S) in PbPb collisions at √s NN = 2.76 TeV
No full textThis is the Pre-print verison of the Article. The official published version can be accessed from the link below - Copyright @ 2012 Springer VerlagYields of prompt and non-prompt J/ψ, as well as U (1S) mesons, are measured by the CMS experiment via their μ + μ − decays in PbPb and pp collisions at Ö{s\textNN} = 2.76 sNN=276 TeV for quarkonium rapidity |y| < 2.4. Differential cross sections and nuclear modification factors are reported as functions of y and transverse momentum p T, as well as collision centrality. For prompt J/ψ with relatively high p T (6.5 < p T < 30 GeV/c), a strong, centrality-dependent suppression is observed in PbPb collisions, compared to the yield in pp collisions scaled by the number of inelastic nucleon-nucleon collisions. In the same kinematic range, a suppression of non-prompt J/ψ, which is sensitive to the in-medium b-quark energy loss, is measured for the first time. Also the low-p T U (1S) mesons are suppressed in PbPb collisions.This work was supported by the Austrian Federal Ministry of Science and Research; the Belgium Fonds de la Recherche Scientifique, and Fonds voor Wetenschappelijk
Onderzoek; the Brazilian Funding Agencies (CNPq, CAPES, FAPERJ, and FAPESP); the Bulgarian Ministry of Education and Science; CERN; the Chinese Academy of Sciences, Ministry of Science and Technology, and National Natural Science Foundation of China; the Colombian Funding Agency (COLCIENCIAS); the Croatian Ministry of Science, Education and Sport; the Research Promotion Foundation, Cyprus; the Estonian Academy of Sciences and NICPB; the Academy of Finland, Finnish Ministry of Education and Culture, and Helsinki Institute of
Physics; the Institut National de Physique Nucl´eaire et de Physique des Particules / CNRS, and Commissariat a l’Energie Atomique et aux Energies Alternatives / CEA, France; the Bundesministerium fur Bildung und Forschung, Deutsche Forschungsgemeinschaft, and Helmholtz-Gemeinschaft Deutscher Forschungszentren, Germany; the General Secretariat for Research and Technology, Greece; the National Scientific Research Foundation, and National Office for
Research and Technology, Hungary; the Department of Atomic Energy and the Department of Science and Technology, India; the Institute for Studies in Theoretical Physics and Mathematics, Iran; the Science Foundation, Ireland; the Istituto Nazionale di Fisica Nucleare, Italy; the Korean
Ministry of Education, Science and Technology and the World Class University program of NRF, Korea; the Lithuanian Academy of Sciences; the Mexican Funding Agencies (CINVESTAV, CONACYT, SEP, and UASLP-FAI); the Ministry of Science and Innovation, New Zealand; the Pakistan Atomic Energy Commission; the Ministry of Science and Higher Education and the National Science Centre, Poland; the Fundac¸ ao para a Ciencia e a Tecnologia, Portugal; JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); the Ministry of Education and Science of the Russian Federation, the Federal Agency of Atomic Energy of the Russian Federation, Russian Academy of Sciences, and the Russian Foundation for Basic Research; the Ministry of Science and Technological Development of Serbia; the Ministerio de Ciencia e Innovacion, and Programa Consolider-Ingenio 2010, Spain; the Swiss Funding Agencies (ETH Board, ETH Zurich, PSI, SNF, UniZH, Canton Zurich, and SER); the National Science Council, Taipei; the Scientific and Technical Research Council of Turkey, and Turkish Atomic Energy Authority; the Science and Technology Facilities Council, UK; the US Department of Energy, and the US National Science Foundation
Ipilimumab in pretreated metastatic uveal melanoma patients: safety and clinical efficacy
No full textObservation of Λ Hyperon Local Polarization in p-Pb Collisions at √sNN=8.16 TeV
No full textThe polarization of the Λ and ̄Λ hyperons along the beam direction has been measured in proton-lead (p-Pb) collisions at a center-of-mass energy per nucleon pair of 8.16 TeV. The data were obtained with the CMS detector at the LHC and correspond to an integrated luminosity of 186.0±6.5 nb−1
. A significant azimuthal dependence of the hyperon polarization, characterized by the second-order Fourier sine coefficient Pz,s2, is observed. The Pz,s2 values decrease as a function of charged particle multiplicity, but increase with transverse momentum. A hydrodynamic model that describes the observed Pz,s2 values in nucleus-nucleus collisions by introducing vorticity effects does not reproduce either the sign or the magnitude of the p-Pb results. These observations pose a challenge to the current theoretical implementation of spin polarization in heavy ion collisions and offer new insights into the origin of spin polarization in hadronic collisions at LHC energies
"And they fastened his body to the wall of Beth-shan" (1 Sm 31, 10). The problem of a suicide in the Old Testament. This paper addresses a multi-faceted, intriguing issue of suicide in the Bible, especially in Jewish and ancient tradition. The author aims to show all cases of suicide in the Old Testament (Abimelech, Samson, King Saul and his armor-bearer, Ahithophel, Zimri, Ptolemy Macron, Razis), focusing on a theological, linguistic and cultural analysis of selected biblical excerpts. In addition, there are many of suicide prevention in the Bible in which God’s intervention prevented the accomplishment of suicidal behavior (Moses, David, Elijah, Job, Jeremiah, Jonah). Suicide in the Bible occurs for a variety of complicated, ambiguous reasons, including intense personal guilt, sense of hopelessness, human inclination to despair or tremendous personal loss. The Bible nowhere proscribes suicide distinctly, and the question of self-killing in Hebrew Scriptures is a still live dilemma
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