Virtual photon structure functions and positivity constraints

We study the three positivity constraints among the eight virtual photon structure functions, derived from the Cauchy-Schwarz inequality and which are hence model-independent. The photon structure functions obtained from the simple parton model show quite different behaviors in a massive quark or a massless quark case, but they satisfy, in both cases, the three positivity constraints. We then discuss an inequality which holds among the unpolarized and polarized photon structure functions $F_1^\gamma$, $g_1^\gamma$ and $W_{TT}^\tau$, in the kinematic region $\Lambda^2\ll P^2 \ll Q^2$, where $-Q^2 (-P^2)$ is the mass squared of the probe (target) photon, and we examine whether this inequality is satisfied by the perturbative QCD results.Comment: 24 pages, 13 eps figure

An experimental limit on the coupling of a light neutral pseudoscalar particle to hadrons

Detailed results of an experiment, looking for a short-lived neutral particle decaying by an e+ e- pair in the decay of the 3.68 MeV (3/2) state in 13C, whose decay is predominantly M1, are presented. An upper limit of 7×10-5 has been placed on the branching ratio for decay through such a particle with a mass in the range 1.7 to 1.9 MeV/c2. This leads to an upper limit of 10-6 for the coupling of such a particle to nucleons. Such a limit rules out the explanation of the e+ and e- peaks recently observed in heavy ion collisions, as due to the decay of a neutral particle

Implications of recent solar neutrino observations: an analysis of charged current data

We have analysed the recent results from the observation of charged current \nu_e d \to e^- p p events from solar neutrinos by the Sudbury Neutrino Observatory SNO assuming neutrino oscillations with three active flavours. The data seem to prefer a low mass-squared difference and large mixing angle solution (the so-called LOW solution) in (12) parameter space. However, when combined with the Gallium charged current interaction data from Gallex and GNO, distinct (1\sigma) allowed regions corresponding to the large mixing angle (LMA) and small mixing angle (SMA) appear while the LOW solution is disfavoured upto 3\sigma standard deviation. The physical electron neutrino survival probability corresponding to these best fit solutions are then determined and analysed for their energy dependence.Comment: 16 pages Latex file, with 5 epsf figures; one reference adde

O elemento popular na obra de Jorge Amado

Pesquisa científica apoiada pelo CNPq/PIBIC de agosto de 2012 a julho de 2013, que se dedicou ao estudo dos quatro primeiros romances publicados de Jorge Amado: O País do Carnaval (1931), Cacau (1933), Suor (1934) e Jubiabá (1935). Com o intuito de obter sentidos para o termo “popular”, amplamente relacionado ao autor e às suas obras, tal investigação embasou-se em críticos contemporâneos e em críticas da década de trinta publicadas no Boletim de Ariel. Também foi utilizado o método de compreensão de obras apresentado por Umberto Eco nas conferências Norton de 1993, para abarcar, a partir de conceitos como o de leitor-modelo, por quem e como Jorge Amado era lido, e se esse leitor-empírico difere daquele que os seus romances, denominados às vezes como panfletários, buscavam

Problematising international placements as a site of intercultural learning

This paper theorises some of the learning outcomes of a three-year project concerning student learning in international social work placements in Malaysia. The problematic issue of promoting cultural and intercultural competence through such placements is examined, where overlapping hegemonies are discussed in terms of isomorphism of social work models, that of the nation state, together with those relating to professional values and knowledge, and the tyrannies of received ideas. A critical discussion of cultural competence as the rationale for international placements is discussed in terms of the development of the graduating social worker as a self-reflexive practitioner. The development of sustainable international partnerships able to support student placement and the issue of non-symmetrical reciprocation, typical of wide socio-economic differentials across global regions, is additionally discussed

Four quasi-particle level at 2256 keV in <SUP>182</SUP>Re

In-beam nuclear spectroscopic studies of 182Re, following the reaction 181Ta(&#945;,3n)182Re have been made using gamma-ray and internal conversion electron techniques. K-conversion coefficients for several transitions have been measured and the multi-polarities of the various transitions assigned. In particular, the spin and parity of the four-quasi-particle isomeric level at 2256 keV were determined to be 16-. The g-factor of this level has been measured to be g=0.32&#177;0.05. On the basis of theg-factor and the decay pattern of this level, a configuration {v9/2+[624&#8593;]v7/2-[514&#8595;]v7/2- [503&#8593;]&#960;9/2-[514&#8593;]}&#954;&#960;=16- has been assigned to this level. The nature of the retardation of the gamma transitions deexciting this level is discussed. It is argued that the measured retardation factors can be explained if the nucleus has a triaxial shape

Oral health in the Japan self-defense forces - a representative survey

<p>Abstract</p> <p>Background</p> <p>The oral health of military populations is usually not very well characterized compared to civilian populations. The aim of this study was to investigate two physical oral health characteristics and one perceived oral health measure and their correlation in the Japan self-defense forces (JSDF).</p> <p>Methods</p> <p>Number of missing teeth, denture status, and OHRQoL as evaluated by the Japanese 14-item version of the Oral Health Impact Profile (OHIP-J14) as well as the correlation between these oral health measures was investigated in 911 personnel in the JSDF.</p> <p>Results</p> <p>Subjects did not have a substantial number of missing teeth and only 4% used removable dentures. The mean OHIP-J14 score was 4.6 ± 6.7 units. The magnitude of the correlation between the number of missing teeth with OHIP-J14 scores was small (r = 0.22, p < 0.001). Mean OHIP-J14 scores differed between subjects with and without dentures (8.6 and 4.4, p < 0.001).</p> <p>Conclusions</p> <p>Compared to Japanese civilian populations, personnel of the JSDF demonstrated good oral health. Two physical oral health characteristics were associated with perceived oral health.</p

In-beam gamma-ray and electron spectroscopy following the <SUP>75</SUP>As(p, n)<SUP>75</SUP>Se reaction

The level scheme of75Se has been studied through the75As (p, n) reaction at proton energies from 1.5 to 5.0 MeV.&#947;-ray and internal conversion electron measurements were made using NaI (T1) and Ge(Li) detectors and a six-gap electron spectrometer. A proportional counter and a thin window NaI(T1) detector were used to detect &#947;-rays with energies less than 30 keV. The level scheme has been established by observing the thresholds of various &#947;-rays and by &#947;-&#947; and e--&#947; coincidence measurements. New levels at 133.0, 293.2, 790.0, 953.0, 1020.8, 1184.3, 1198.5 and 1258.2 keV not observed in earlier (p, n) studies have been established. Conversion coefficients of most of the low-lying transitions have been determined. Angular distributions of some of the &#947;-rays were also measured and compared with the statistical model calculations. Definite J&#928; assignments have been made to most of the low-lying levels. Life-times of the 112.1, 133.0, 286.7 and 293.2 keV levels have been measured to be 0.69&#177;0.12, 5.3&#177;0.6, 1.35&#177;0.15 and 31&#177;2 nsec respectively. The reduced transition probabilities for various low-lying transitions have been determined and compared with recent calculations. The &#189; - and 9/2+ levels hitherto unknown in this nucleus has been identified. The structure of the low-lying levels is discussed in terms of the existing models