997 resultados para P.I.D.
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Resumen tomado del autor
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Resumen tomado de la publicaci??n. Documento sujeto a una licencia de Reconocimiento-No comercial-Compartir con la misma licencia 3.0 Espa??a de Creative Commons. ??ltima revisi??n: octubre de 2008
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Resumen basado en el de la publicaci??n
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A data sample corresponding to an integrated luminosity of 2.1 fb(-1) collected by the D phi detector at the Fermilab Tevatron Collider was analyzed to search for squarks and gluinos produced in p (p) over bar collisions at a center-of-mass energy of 1.96 TeV. No evidence for the production of such particles was observed in topologies involving jets and missing transverse energy, and 95% C.L. lower limits of 379 GeV and 308 GeV were set on the squark and gluino masses, respectively, within the framework of minimal supergravity with tan beta = 3, A(0) = 0, and mu < 0. The corresponding previous limits are improved by 54 GeV and 67 GeV. (c) 2008 Elsevier B.V. All rights reserved.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Makar Chudra. O chizhi︠e︡, kotoryĭ lgal, i o d︠ia︡tli︠e︡- li︠u︡biteli︠e︡ istiny. Emelʹi︠a︡n Pili︠a︡ĭ. D︠ie︡d Arkhip i Lenʹka. Chelkash. Starykha Izergil. Odnazhdy osenʹi︠u︡. Oshibka. Moĭ sputnik. D︠ie︡lo s zastezhkami. P︠ie︡sn︠ia︡ o so koli︠e︡. Na plotakh. Bolesʹ. Toska. -- t. 2. Konovalov. Khan i ego syn. Vyvod. Suprugi Orlovy. Byvshīe li︠u︡di. Ozornik. Barenʹka Olesova. Tovarishchi. -- t. 3. V stepi. Malʹva. I︠A︡rmarka v Goltvi︠e︡. Zazubrina. Skuki padi. Kain i Artem. Druzhki. Prokhodimet︠︡s. Chitatelʹ. O chort︠ie︡. Eshche o chort︠ie︡. Vasʹka Krasnyĭ. -- t. 4. Foma Gord︠ie︡ev. Dvad︠t︡satʹ shestʹ i odna. -- Troe. Pesn︠ia︡ o burevestnike. -- t. 6-8. Mi︠e︡shchane. Na dne. Dachniki. D︠ie︡ti soln︠t︡sa. Varvary. Vragi. -- t. 9. Chelovek. T︠iu︡rʹma. Bukoemov, Karp Ivanovich. Razskazy Filippa Vasilʹevicha. Ispovedʹ
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Mode of access: Internet.
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Inserted into v. 1: "Historical Preface to Primitive Christianity Reviv'd," p. i-cxxxvi; appendix I, cxxxvii-clvvx; appendix II, p. 1-61; and "Supplement" and "Postscript" p. 63-78.
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Demokratiuppdraget är ett av skolans i huvudsak viktigaste uppdrag, vilket innebär att skolan ska fostra eleverna till demokratiska medborgare med grundläggande demokratiska värderingar. Skolinspektionens granskningsrapporter visar att flertalet skolor brister i sitt demokratiuppdrag, och då främst skolor belägna i områden med låg socioekonomisk status. Syftet med denna studie är att undersöka hur lärare, verksamma på skolor med skilda socioekonomisk status, tänker om och beskriver att de arbetar med skolans demokratiska uppdrag. Studien har genomförts med hjälp av kvalitativa, halvstrukturerade gruppintervjuer med lärare verksamma på två skolor belägna i skilda socioekonomiska områden. Intervjuerna var utformade för att få ut faktisk information, lärarnas tolkningar, uppfattningar och berättelser. Det transkriberade materialet analyserades med hjälp av meningskoncentrering i syfte att jämföra lärares tankar och arbetssätt i deras demokratiska uppdrag. Resultatet visar att skolor belägna i skilda socioekonomiska områden har olika förutsättningar till att arbeta med skolans demokratiska uppdrag, vilket stämmer överens med tidigare forskning som menar att föräldrars utbildning och etisk tillhörighet är två betydelsefulla variabler som påverkar utgången i elevernas möjlighet att tillgodose sig kunskaper om demokratiska processer samt demokratiska värderingar. Detta kan i framtiden hota det demokratiska samhälle som vi lever i, då alla elever inte ges samma möjlighet att utvecklas till demokratiska samhällsmedborgare.
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The PHENIX experiment at the Relativistic Heavy Ion Collider has performed systematic measurements of phi meson production in the K(+)K(-) decay channel at midrapidity in p + p, d + Au, Cu + Cu, and Au + Au collisions at root s(NN) = 200 GeV. Results are presented on the phi invariant yield and the nuclear modification factor R(AA) for Au + Au and Cu + Cu, and R(dA) for d + Au collisions, studied as a function of transverse momentum (1 < p(T) < 7 GeV/c) and centrality. In central and midcentral Au + Au collisions, the R(AA) of phi exhibits a suppression relative to expectations from binary scaled p + p results. The amount of suppression is smaller than that of the pi(0) and the. in the intermediate p(T) range (2-5 GeV/c), whereas, at higher p(T), the phi, pi(0), and. show similar suppression. The baryon (proton and antiproton) excess observed in central Au + Au collisions at intermediate p(T) is not observed for the phi meson despite the similar masses of the proton and the phi. This suggests that the excess is linked to the number of valence quarks in the hadron rather than its mass. The difference gradually disappears with decreasing centrality, and, for peripheral collisions, the R(AA) values for both particle species are consistent with binary scaling. Cu + Cu collisions show the same yield and suppression as Au + Au collisions for the same number of N(part). The R(dA) of phi shows no evidence for cold nuclear effects within uncertainties.
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PHENIX has measured the e(+)e(-) pair continuum in root s(NN) = 200 GeV Au+Au and p+p collisions over a wide range of mass and transverse momenta. The e(+)e(-) yield is compared to the expectations from hadronic sources, based on PHENIX measurements. In the intermediate-mass region, between the masses of the phi and the J/psi meson, the yield is consistent with expectations from correlated c (c) over bar production, although other mechanisms are not ruled out. In the low-mass region, below the phi, the p+p inclusive mass spectrum is well described by known contributions from light meson decays. In contrast, the Au+Au minimum bias inclusive mass spectrum in this region shows an enhancement by a factor of 4.7 +/- 0.4(stat) +/- 1.5(syst) +/- 0.9(model). At low mass (m(ee) < 0.3 GeV/c(2)) and high p(T) (1 < p(T) < 5 GeV/c) an enhanced e(+)e(-) pair yield is observed that is consistent with production of virtual direct photons. This excess is used to infer the yield of real direct photons. In central Au+Au collisions, the excess of the direct photon yield over the p+p is exponential in p(T), with inverse slope T = 221 +/- 19(stat) +/- 19(syst) MeV. Hydrodynamical models with initial temperatures ranging from T(init) similar or equal to 300-600 MeV at times of 0.6-0.15 fm/c after the collision are in qualitative agreement with the direct photon data in Au+Au. For low p(T) < 1 GeV/c the low-mass region shows a further significant enhancement that increases with centrality and has an inverse slope of T similar or equal to 100 MeV. Theoretical models underpredict the low-mass, low-p(T) enhancement.
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Measurements of the azimuthal anisotropy of high-p(T) neutral pion (pi(0)) production in Au+Au collisions at s(NN)=200 GeV by the PHENIX experiment are presented. The data included in this article were collected during the 2004 Relativistic Heavy Ion Collider running period and represent approximately an order of magnitude increase in the number of analyzed events relative to previously published results. Azimuthal angle distributions of pi(0) mesons detected in the PHENIX electromagnetic calorimeters are measured relative to the reaction plane determined event-by-event using the forward and backward beam-beam counters. Amplitudes of the second Fourier component (v(2)) of the angular distributions are presented as a function of pi(0) transverse momentum (p(T)) for different bins in collision centrality. Measured reaction plane dependent pi(0) yields are used to determine the azimuthal dependence of the pi(0) suppression as a function of p(T), R(AA)(Delta phi,p(T)). A jet-quenching motivated geometric analysis is presented that attempts to simultaneously describe the centrality dependence and reaction plane angle dependence of the pi(0) suppression in terms of the path lengths of hypothetical parent partons in the medium. This set of results allows for a detailed examination of the influence of geometry in the collision region and of the interplay between collective flow and jet-quenching effects along the azimuthal axis.
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We report the observation at the Relativistic Heavy Ion Collider of suppression of back-to-back correlations in the direct photon+jet channel in Au+Au relative to p+p collisions. Two-particle correlations of direct photon triggers with associated hadrons are obtained by statistical subtraction of the decay photon-hadron (gamma-h) background. The initial momentum of the away-side parton is tightly constrained, because the parton-photon pair exactly balance in momentum at leading order in perturbative quantum chromodynamics, making such correlations a powerful probe of the in-medium parton energy loss. The away-side nuclear suppression factor, I(AA), in central Au+Au collisions, is 0.32 +/- 0.12(stat)+/- 0.09(syst) for hadrons of 3 < p(T)(h)< 5 in coincidence with photons of 5 < p(T)(gamma)< 15 GeV/c. The suppression is comparable to that observed for high-p(T) single hadrons and dihadrons. The direct photon associated yields in p+p collisions scale approximately with the momentum balance, z(T)equivalent to p(T)(h)/p(T)(gamma), as expected for a measurement of the away-side parton fragmentation function. We compare to Au+Au collisions for which the momentum balance dependence of the nuclear modification should be sensitive to the path-length dependence of parton energy loss.
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Angiotensin I-converting enzyme (ACE) is recognized as one of the main effector molecules involved in blood pressure regulation. In the last few years some polymorphisms of ACE such as the insertion/deletion (I/D) polymorphism have been described, but their physiologic relevance is poorly understood. In addition, few studies investigated if the specific activity of ACE domain is related to the I/D polymorphism and if it can affect other systems. The aim of this study was to establish a biochemical and functional characterization of the I/D polymorphism and correlate this with the corresponding ACE activity. For this purpose, 119 male brazilian army recruits were genotyped and their ACE plasma activities evaluated from the C- and N-terminal catalytic domains using fluorescence resonance energy transfer (FRET) peptides, specific for the C-domain (Abz-LFK(Dnp)OH), N-domain (Abz-SDK(Dnp)P-OH) and both C- and N-domains (Abz-FRK(Dnp)P-OH). Plasma kallikrein activity was measured using Z-Phe-Arg-AMC as substrate and inhibited by selective plasma kallikrein inhibitor (PKSI). Some physiological parameters previously described related to the I/D polymorphism such as handgrip strength, blood pressure, heart rate and BMI were also evaluated. The genotype distribution was II n = 27, ID n = 64 and DD n = 28. Total plasma ACE activity of both domains in II individuals was significantly lower in comparison to ID and DD. This pattern was also observed for C- and N-domain activities. Difference between ID and DD subjects was observed only with the N-domain specific substrate. Blood pressure, heart rate, handgrip strength and BMI were similar among the genotypes. This polymorphism also affected the plasma kallikrein activity and DD group presents high activity level. Thus, our data demonstrate that the I/D ACE polymorphism affects differently both ACE domains without effects on handgrip strength. Moreover, this polymorphism influences the kallikrein-kinin system of normotensive individuals. (C) 2009 Elsevier Ltd. All rights reserved.
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Pelo menos três agentes - o governo, a indústria e as instituições de ensino e pesquisa - devem atuar solidariamente na criação e no desenvolvimento do conhecimento. Mesmo com características distintas, devem atuar de forma cooperada para que os ganhos se multipliquem e estendam pela cadeia produtiva. Na sociedade do conhecimento, investir em P&D é quase que uma imposição para que haja desenvolvimento econômico e social. O governo brasileiro tem sido, por muito tempo, o responsável pela maior parte dos investimentos em P&D, no entanto hoje existem diversas iniciativas para estimular o investimento privado em P&D. Os objetivos deste trabalho são discutir as principais iniciativas do governo brasileiro, nos últimos 10 anos, que influenciarão no desenho das atividades de P&D no país, a fim de obter uma melhor compreensão acerca do papel do governo na promoção do P&D. A análise conjunta dos marcos institucionais possibilita perceber a força transformadora que provocarão no cenário, o que não seria possível se vistos isoladamente. Este artigo buscou convergir estas iniciativas para obter uma melhor compreensão acerca do papel do governo na promoção do P&D. Pode-se observar que o governo brasileiro é um importante parceiro para as empresas interessadas em investir em P&D; no entanto, muitas delas não o veem nesta posição.