Finite Size Effects in Quark-Gluon Plasma Formation

Using lattice simulations of quenched QCD we estimate the finite size effects present when a gluon plasma equilibrates in a slab geometry, i.e., finite width but large transverse dimensions. Significant differences are observed in the free energy density for the slab when compared with bulk behavior. A small shift in the critical temperature is also seen. The free energy required to liberate heavy quarks relative to bulk is measured using Polyakov loops; the additional free energy required is on the order of $30-40 MeV$ at $2-3 T_c$.Comment: LATTICE98(hightemp), talk at Lattice 98, 3 pages, 3 encapsulated postscript figures, uses espcrc2.st

A Feasibility Study To Provide A Comprehensive Program Of Newer Educational Communications Media For The Educational System Of British Guiana

The purpose of this study is (1) to point out the educational values of communications media with special emphasis on the newer media; (2) to trace their growth and development in selected countries and to determine to what extent they are being used in these countries and for what specific purposes; and (3) to study different programs in the United States of America with the idea of proposing a similar program for British Guiana

Destination Memory: Stop Me If I Told You This Already

Consider a common social interaction: Two people must each attend to and remember the other person’s behaviour while also keeping track of their own responses. Knowledge of what one said to whom is important for subsequent interactions so that information is not repeated to the same person. Remembering what one said to others is also important in the workplace where supervisors need to remember to whom they have told specific information so that they can later assess assignment progress from the relevant employee. The processes involved in remembering the destination of information will be referred to as “destination memory” in this dissertation. Although there has been extensive research regarding the processes involved in remembering the source of information, or “source memory,” there has been little to no research on destination memory. In a series of four experiments, this dissertation delineates the core features of destination memory. In Experiment 1, a paradigm was developed to assess destination memory in the laboratory. This experiment also corroborated complaints of destination memory failures: Adults have very poor destination memory when compared to memory for the information they tell or the person to whom they tell the information. Destination memory fundamentally differs from source memory in terms of how information is transferred—“input” in the case of source memory and “output” in the case of destination memory. Attention is directed at the processes involved in transmitting information in the case of destination memory which leaves fewer attention resources for associating the information with the person one is telling it to. Therefore, it would be anticipated that destination memory would be worse than source memory. Experiment 2 directly contrasted destination memory and source memory and confirmed that destination memory accuracy was indeed substantially lower than source memory accuracy. Because in the case of a destination event information is self-produced, attention is focused on oneself. Experiment 3 assessed whether self-focus reduces the association between the outputted information and the person that one is telling it to. When self-focus increased, so too did destination memory errors because fewer attentional resources were available to integrate the person-information pairing. This led to the prediction that, in the reverse situation where attentional resources are directed to the person-information pairing at encoding, then destination memory should improve. Experiment 4 confirmed this prediction: Destination memory was enhanced when people’s attention was shifted from themselves to the person-information pairing. This thesis has undertaken to examine a surprisingly neglected component of normal remembering—remembering who one told something to. To study this “destination memory,” a new paradigm is introduced. Across four experiments, destination memory is seen to be quite fallible, more so than source memory. An account is offered in terms of destination memory being undermined by the self-focus that it generates. This view is reinforced by two experiments that show that increasing self-focus reduces destination memory whereas increasing environment-focus improves destination memory. Like source memory, destination memory is a key component of episodic memory, the record of our personal past

The psychological impact of breast reconstruction after prophylactic or therapeutic mastectomy for breast cancer

In this thesis the psychological impact of two types of breast reconstruction after prophylactic or therapeutic mastectomy for breast cancer was investigated with a prospective study including 202 patients from different hospitals in the South-West of the Netherlands between 2007-2012. With semi-structured interviews the motives to opt for breast reconstruction were qualitatively investigated. The impact of breast reconstruction was further investigated with psychological questionnaires from baseline to the end of the breast reconstruction procedure (mean follow-up of 21 months). The psychological outcomes after breast reconstruction that were investigated were: body image, satisfaction with the partner relationship and the sexual relationship, general anxiety and depression, cancer distress, and general mental and physical health. In general, the psychological outcomes after breast reconstruction were acceptable, however a subgroup of women experienced psychological adjustment problems. A percentage of 20-30% remained having problems with changes in their body image and the impact on the intimate partner relationship. Women at risk for psychological adjustment problems were younger women, those with significant cancer distress, women who experienced complications after surgery, particularly if the breast reconstruction failed, and women who underwent bilateral prophylactic mastectomy because of an increased hereditary risk to develop breast cancer.KWF KankerbestrijdingUBL - phd migration 201

Psychosocial behaviour of adolescent learners from divorced families in Newlands West, Durban.

Thesis (M.Ed.) - University of Natal, 2003.The primary purpose of the research was to explore and describe the effects of divorce on the psychosocial behaviour of adolescent learners from Newlands West. The secondary purpose, based on this research, was to formulate guidelines to improve the quality of interventions by educators in schools which will assist adolescents to cope with the challenges associated with divorce. The sample consisted of twenty participants between 12 and 18 years. Adolescents were selected for this study because they were mature enough to articulate their awareness and experiences of the divorce situation and family issues. They were from grades eight to twelve from New West Secondary School in Newlands West. The methodology used for this research was based on a qualitative paradigm. This ensured that data was rich and diverse in nature, especially since a small sample was used and it allowed each participant to provide indepth information regarding their experiences of their parents' divorce. The narrative interview was used and measures were applied to ensure trustworthiness. Interviews were tape recorded to ensure that the data was accurate. The researcher had access to this information and could continuously refer to it. It also allowed the researcher to listen attententively to the participants, without disrupting their flow of thought by writing or summarizing their responses. The researcher explained to the participants the purpose of the study and the same question was given to all participants, namely: "Could you tell me how the divorce of your parents has affected you?" The audio-taped interviews were transcribed and analysed. A descriptive analysis technique was used and central themes were identified. The themes which emerged were: ~ Adolescent learners' views on why their parents are getting divorced ~ Effect of the divorce on the adolescent learners ~ Sources of support for adolescent learners to cope with the divorce ~ Adolescent learners' views on parent reconciliation ~ Relationship of adolescent learners with non-custodial parent(s) The study concluded that divorce had a debilitating impact on the psychosocial behaviour of adolescents in this school and that there was a need for appropriate structures to be established to effectively address the issue in school

Uma metodologia numérica para prever o potencial hidrocinético em canais naturais

Dissertação (mestrado) — Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Mecânica, 2022.Neste trabalho, é apresentada uma metodologia numérica para avaliação do potencial hidrocinético em canais naturais. A metodologia é validada usando um canal de benchmark sinuoso cujos dados são disponíveis na literatura. O canal de benchmark é modelado e simulado empregando métodos de simulação numérica de escoamentos turbulentos considerando. Os resultados de referência são comparados com resultados gerados por três modelos de turbulência diferentes: o modelo k − ε padrão, um modelo k − ε modificado e um RSM. O RSM forneceu resultados mais consistentes com os da literatura. Este desenvolvimento comprova a metodologia proposta capaz de reproduzir o escoamento no canal benchmark. Portanto, a mesma metodologia pode ser empregada para simular o escoamento em um canal natural, juntamente com o modelo de turbulência provado como o mais consistente e proficiente na replicação do escoamento no canal benchmark. Como modelo geométrico para esta fase da pesquisa, são utilizados os dados batimétricos do canal à jusante da usina hidrelétrica da Sefac. Para avaliar o potencial hidrocinético disponível neste canal, são procuradas áreas com alta velocidade e profundidade. Um total de cinco áreas encontram-se em conformidade com esses requisitos. Destas cinco, três são encontradas para conter os maiores valores de velocidade (≈ 1 m/s) e profundidade (≈ 1.5 m). Essas áreas também foram estudadas quanto aos seus níveis de turbulência, para prolongar a vida útil das turbinas, analisando a ocorrência de correntes secundárias e perfis de intensidade de turbulência. Os níveis de turbulência, embora muito baixos em valores absolutos, são os mais altos próximos ao leito do canal, onde nenhuma turbina seria instalada, enquanto as correntes secundárias não foram observadas. Na contemplação de avaliar o potencial hidrocinético produzido anualmente por essas três áreas, foram simulados cenários de vazão adicionais, representando as vazões com ocorrências mais frequentes em um dado ano. Posteriormente, foram estudadas as velocidades nas três áreas previamente selecionadas para encontrar locais potenciais específicos para instalação de turbinas hidrocinéticas. No final, os três trechos têm potencial para instalação de um total de 24 turbinas, capazes de gerar ≈ 71 MW h no ano de 2018.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES).In this work, a numerical methodology for evaluating the hydrokinetic potential in natural channels is presented. The methodology is validated using a meandering benchmark channel found in the literature. The benchmark channel is modeled and simulated employing CFD tools. The results from the literature are compared to results generated by three different turbulence models: the standard k − ε model, a modified k − ε model and a RSM. The RSM is proven to be the most consistent and proficient at generating results similar to the literature. This development proves the proposed methodology capable of replicate the flow in the benchmark channel. Therefore, this methodology is employed for simulating the flow in a natural channel, along with the turbulence model proven to be the most consistent and proficient in reproducing the flow in the benchmark channel. As a geometric model for this phase of the research, the bathymetric data of the channel downstream of the Sefac hydroelectric facility is utilized. In order to assess the hydrokinetic potential available within this channel, areas with the highest velocities and depths of are desired. A total of five areas are found complying to these requirements. Out of these five areas, three are found to contain the highest velocities (≈ 1 m/s) and depth (≈ 1.5 m) values. These areas were also studied for their turbulence levels, to prolong the lifespan of the turbines, by analyzing the occurrence of secondary currents and turbulence intensity profiles. The turbulence levels, although negligible by their value, are found to be the highest near the channel bed, where no turbines would be installed, while the secondary currents are low to none. In contemplation of evaluating the hydrokinetic potential produced yearly by these three areas, additional flow rate scenarios were simulated, representing the most frequent occurring flow rates of the year 2018. Subsequently, the velocities in the three previously selected areas were studied to the end of finding specific potential locations for installing hydrokinetic turbines. Ultimately, the three sections allow for installing a total of 24 turbines, capable of generating a potential ≈ 71 MW h in the year of 2018

Acute pneumonitis secondary to subcutaneous silicone injection

Following silicone injection, end organ toxicity can occur. To our knowledge this report documents the first case of silicone embolization in the Caribbean and serves to highlight an emergent danger associated with its illicit use for cosmetic purposes in this region

Ethnic disparities in tuberculosis incidence and related factors among indigenous and other communities in ethnically diverse Suriname

Background: In Suriname, a country home to many ethnic groups, a high incidence of tuberculosis (TB) has been found among Indigenous Trio Amerindians. However, whether wider ethnic disparities in TB incidence and its associated risk factors (e.g., diabetes mellitus and HIV) exist in Suriname, is not known. We sought to investigate disparities in TB incidence and its risk factors on ethnicity in Suriname, as this could give way to targeted TB intervention programs. Methods: Anonymized patient data from 2011 to 2015 was extracted from the National TB Registry and analyzed. Differences in the five-year incidence rates of TB for the six largest ethnic groups-Creole, Hindustani, Indigenous, Javanese, Maroon, and Mixed-were assessed using a chi-square goodness-of-fit test, and TB patient differences regarding ethnicity were evaluated for selected factors using a multinomial logistic regression with Creole patients as reference. Results: 662 Patients were eligible for analyses with the following ethnic makeup: Creole (36.4%), Hindustani (15.6%), Indigenous (8.6%), Javanese (10.6%), Maroon (15.1%), and Mixed ethnicity (13.7%). Differences in five-year incidence rates for TB were significant, chi(2)(5, N = 662) = 244.42, p Conclusions: Our study has demonstrated that ethnic disparities in tuberculosis incidence exist in Suriname and that they are associated with specific, known risk factors such as HIV (especially for Creole people). For Indigenous people, risk factors may include diminished access to health care facilities and low socioeconomic status. However, direct data on these factors was unavailable. These findings call for targeted national intervention programs-with special attention given to the vulnerabilities of susceptible ethnic groups-and improved data collection

Non-tuberculous mycobacteria in sputum cultures in Suriname

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