485 research outputs found
Impact of baryon resonances on the chiral phase transition at finite temperature and density
We study the phase diagram of a generalized chiral SU(3)-flavor model in
mean-field approximation. In particular, the influence of the baryon
resonances, and their couplings to the scalar and vector fields, on the
characteristics of the chiral phase transition as a function of temperature and
baryon-chemical potential is investigated. Present and future finite-density
lattice calculations might constrain the couplings of the fields to the
baryons. The results are compared to recent lattice QCD calculations and it is
shown that it is non-trivial to obtain, simultaneously, stable cold nuclear
matter.Comment: 18 pages, 7 figure
Connecting with strangers in the city: A mattering approach
The evidence that social relationships are associated with wellâbeing is so strong that it is taken as a âfactâ (Kushlev et al., 2018, Journal of Research in Personality, 74, 124). The bulk of the existing evidence derives from research examining social relationships with close others, such as family, romantic partners, and friends (Dolan et al., 2008, Journal Economic Psychology, 29, 94; Li & Kanazawa, 2016, British Journal of Psychology, 107, 675). However, less is known about how connecting with strangers is associated with wellâbeing, how such connections are represented by people, and what motivates peopleâs desire to connect with strangers. This study aims to examine representations and motivations for social connectedness with strangers in contemporary British cities. To do this, an interview study of 52 cityâdwellers living in Britainâs two largest cities, London and Birmingham, was conducted. The Grid Elaboration Method (GEM) (Joffe & Elsey, 2014, Review of General Psychology, 18, 173), a free association and interview technique, was applied. Thematic analysis revealed that representations of strangers vacillate between âgoodâ and âbadâ, are built upon the âself/otherâ thema, are shaped by the contextual factors place, time, and technology, and are motivated by a desire to âmatterâ. This work makes a key contribution to the study of social connectedness in cities and can inform effective urban policy
Clinicopathological features of extranodal lymphomas: Kuwait experience
A total of 935 patients with extranodal non-Hodgkin lymphoma (NHL) diagnosed in the period between January 1985 and December 2000 in Kuwait Cancer Center, serving the whole population of Kuwait, were used to describe the clinicopathological and epidemiological features of extranodal lymphomas in Kuwait. Extranodal lymphomas accounted for 45% of all NHL observed during this time. All NHL cases from Kuwait Cancer registry were analyzed and pathologically reclassified using the latest WHO ( 2000) classification. The most common lymphoma observed was diffuse large B-cell lymphoma (58.60%) followed by Burkitt's lymphoma (BL) (3.80%). In the pediatric group, BL comprises more than two thirds of all patients (77.20%). The most common extranodal sites were stomach (19.70%) and skin (17.80%) in the adult group, large intestine (29.80%) and small intestine (19.30%) in the pediatric age group. The majority (73.40%) of adult extranodal lymphomas was in stage IE - IIE and had a very good prognosis. On the contrary, the majority of pediatric extranodal lymphomas were found to be in stage III and IV. Variations in treatment policies ( single agent or combined chemotherapy, radiotherapy, combined modality treatment) adopted and changed during the time period of 16 years of this retrospective study were documented. Copyright (C) 2004 S. Karger AG, Basel
Negative Consequences of Substance Use in European University Students: Results from Project SNIPE
Background: University students are a risk group for heavy substance use and the experience of various potentially severe negative substance use consequences which may impact on their health, social, and academic functioning. Whilst the experience of negative consequences of substance use is well understood in North American student samples, there is little data on these experiences in European students. In order to develop effective harm prevention and reduction interventions for studentsâ substance use, there needs to be an understanding of the types of consequences experienced in European student samples. Objectives: The aim of the study was to investigate the prevalence and predictors of the experience of negative substance use-related consequences amongst university students in 7 European countries. Methods: University students (n = 4,482) in Belgium, Denmark, Germany, the Slovak Republic, Spain, Turkey, and the UK completed an online survey of their substance use behaviours and the experience of associated negative consequences. Results: European students reported that experiencing a hangover or illness, missing class, being short of money, and experiencing memory loss were the most commonly experienced negative consequences of substance use. Not living with other students and using alcohol, cannabis, sedatives, and cocaine were also associated with higher odds of experiencing these negative consequences. Conclusions: In contrast to North American data, European university students tended to experience consequences that are associated with lower level health risks rather than more severe consequences (e.g., drink-driving and physical injury). Harm prevention and reduction interventions for students should be targeted towards those consequences that are most salient to the target group to ensure feedback is relevant and potentially more effective in changing studentsâ substance use behaviours
The Los Alamos Supernova Light Curve Project: Computational Methods
We have entered the era of explosive transient astronomy, in which upcoming
real-time surveys like the Large Synoptic Survey Telescope (LSST), the Palomar
Transient Factory (PTF) and Panoramic Survey Telescope and Rapid Response
System (Pan-STARRS) will detect supernovae in unprecedented numbers. Future
telescopes such as the James Webb Space Telescope may discover supernovae from
the earliest stars in the universe and reveal their masses. The observational
signatures of these astrophysical transients are the key to unveiling their
central engines, the environments in which they occur, and to what precision
they will pinpoint cosmic acceleration and the nature of dark energy. We
present a new method for modeling supernova light curves and spectra with the
radiation hydrodynamics code RAGE coupled with detailed monochromatic opacities
in the SPECTRUM code. We include a suite of tests that demonstrate how the
improved physics is indispensable to modeling shock breakout and light curves.Comment: 18 pages, 19 figures, published in ApJ Supplement
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