S17(0) Determined from the Coulomb Breakup of 83 MeV/nucleon 8B

A kinematically complete measurement was made of the Coulomb dissociation of 8B nuclei on a Pb target at 83 MeV/nucleon. The cross section was measured at low relative energies in order to infer the astrophysical S factor for the 7Be(p,gamma)8B reaction. A first-order perturbation theory analysis of the reaction dynamics including E1, E2, and M1 transitions was employed to extract the E1 strength relevant to neutrino-producing reactions in the solar interior. By fitting the measured cross section from Erel = 130 keV to 400 keV, we find S17(0) = 17.8 (+1.4, -1.2) eV b

“Mirrors, windows, and sliding glass doors”: A case study of teaching and learning for affective outcomes in comprehensive musicianship through performance for band

The purpose of this case study was to investigate one band teacher’s approach to affective teaching and his students’ experiences with affective learning. This study was guided by the following questions: How does one band teacher plan, facilitate, and assess affective musical experiences? What meaning do students assign to affective musical experiences? How do students’ affective musical experiences transfer to performance and personal understandings? What value do students and teachers perceive in affective development through music? Due to the selected repertoire being deeply connected to topics like White supremacy, racial terror, and racism, and the classroom context being majority White, two additional sub-research questions were added during the study. How does one music teacher plan, facilitate, and assess anti-racist affective experiences in a majority White classroom context? What meaning do students assign to anti-racist affective musical experiences? These sub-questions are explored through the lens of Bishop’s (1990) theorizing on the role of children’s literature as portals of understanding the self and others in a racialized society and Hess’s (2017) notions of euphemisms, terminal naivety, and Whiteness in the music classroom. Participants included one band director and three students in grades 10-12 at one high school in a suburban location in the Midwest. Data collected over four months included individual interviews, classroom observations, and field notes. Analysis revealed the following core themes: diversified affective experiences, inexplicit race and equity talk, and, following a metaphor offered by Bishop (1990) the repertoire as a mirror, window, and sliding glass door. The teacher in this study intentionally facilitated multiple affective experiences for his students, each of which was planned, flexible in nature, invoked student-centered and democratic learning, and allowed space for varied perspectives and conclusions. The three students associated affective experiences with deeper understanding of their music, which resulted in heightened performance and personal experiences. Varying levels of musical and personal learning transfer occurred, and each participant ascribed positive value to affective development through music. Race and its impact on the affective experiences of both the teacher and students emerged as a primary consideration over the course of the study. Anti-racism and mirrors, windows, and sliding glass doors are used as lenses through which to view anti-racist experiences in the classroom. The mirror reflected back images of Whiteness, White privilege, or cultural knowledge. Windows provided perspective into experiences with which students were unfamiliar. Sliding glass doors provided participants with opportunities to more directly engage with cultural artifacts. Consideration is also given to the ways in which affective teaching and learning serve to socialize students

Plano de negócios e desenvolvimento de um aplicativo web de classificados

TCC (graduação) - Universidade Federal de Santa Catarina, Centro Tecnológico, Engenharia Elétrica.Este trabalho tem como objetivo o desenvolvimento de um aplicativo web de classificados, abrangendo desde a concepção até a implantação de uma solução funcional, escalável e voltada às necessidades do mercado atual. A proposta integra aspectos técnicos e estratégicos, combinando o uso de tecnologias modernas com a elaboração de um plano de negócios estruturado. No âmbito técnico, o sistema foi desenvolvido com base em princípios de engenharia de software, utilizando linguagens web, interface responsiva e integração com serviços de computação em nuvem, como Firebase e Google Cloud Platform, assegurando flexibilidade, desempenho e capacidade de crescimento. No plano estratégico, foram analisados fatores como mercado-alvo, concorrência, estrutura de custos, estratégias de monetização e viabilidade financeira. A metodologia aplicada permitiu avaliar não apenas a construção do produto mínimo viável (MVP), mas também os desafios enfrentados durante a tentativa de validação do projeto no ambiente real. O trabalho, portanto, contribui tanto para o aprendizado técnico de desenvolvimento web quanto para a compreensão do processo empreendedor e de tomada de decisão em negócios digitais.This work aims to develop a web-based classified ads application, encompassing the entire process from conception to the deployment of a functional and scalable solution tailored to current market demands. The project integrates both technical and strategic aspects, combining modern technologies with the creation of a structured business plan. On the technical side, the system was developed based on software engineering principles, using web programming languages, a responsive interface, and integration with cloud computing services such as Firebase and Google Cloud Platform, ensuring flexibility, performance, and scalability. On the strategic side, the study analyzed key factors including target market, competition, cost structure, monetization strategies, and financial viability. The applied methodology enabled the evaluation of not only the development of a Minimum Viable Product (MVP) but also the challenges encountered in the process of validating the project in a real-world context. Therefore, this work contributes to both technical knowledge in web development and a deeper understanding of entrepreneurship and decision-making in digital business environments

Grazing on the Early Life History Stages of Macrocystis pyrifera by the Purple Sea Urchin Strongylocentrotus purpuratus

In California, recent large-scale declines in kelp forest cover, the formation of sea urchin barrens, and the subsequent biodiversity loss have heightened the need to further investigate mechanisms of kelp forest recovery and sea urchin barren dynamics. To better understand the kelp recruitment potential of these deforested areas it is important to determine the effect sea urchins have on the microscopic portion of the kelp lifecycle and if a size refuge exists. Laboratory studies were used to examine the effect of the purple sea urchin Strongylocentrotus purpuratus on the density, percent cover and reproductive output for three microscopic stages of Giant Kelp, Macrocystis pyrifera. Three separate experiments were initiated, each beginning at a different microscopic stage: newly settled zoospore (2 days old), prefertile gametophyte (13 days old), and embryonic sporophyte ( 4 weeks old). Each experiment ran for three weeks. In all experiments, sea urchins decreased the densities of microscopic stages within 1 week. In all experiments sea urchins also reduced gametophyte percent cover. Purple sea urchins significantly reduced embryonic sporophyte density and hindered sporophyte recruitment in all experiments. The impact of purple sea urchin on per capita oogonia and sporophytes, as well as the density of gametophytes with oogonia and sporophytes, was assessed in the experiments starting at the youngest stages (zoospore and prefertile gametophytes). Sea urchins had no effect on the number of oogonia or sporophytes produced per gametophyte. In the prefertile gametophyte experiment, sea reduced the density of gametophytes with oogonia and sporophytes. This study found no evidence for a size refuge, i.e., no microscopic stage was too small for sea urchins to affect. These findings suggest that microscopic stages, existing prior to urchin barren formation, may not be a reliable source for recruitment. Additionally, this study suggests that urchins also have the potential to suppress recruitment of sporophytes from new zoospore input. We propose that the impact of urchins on the microscopic stages of M. pyrifera is a significant factor in explaining the persistence of purple urchin barrens for prolonged periods, particularly those isolated from established kelp forests without continuous zoospore input and settlement

Development of a high-pressure, gas-filled ion source for a radioactive beam facility

Thesis (Ph. D.)--Michigan State University, Department of Chemistry, 2003Includes bibliographical references (pages 100-102

Babesia divergens–like Infection, Washington State

Most reported U.S. zoonotic cases of babesiosis have occurred in the Northeast and been caused by Babesia microti. In Washington State, three cases of babesiosis have been reported previously, which were caused by WA1 (for “Washington 1”)-type parasites. We investigated a case of babesiosis in Washington in an 82–year-old man whose spleen had been removed and whose parasitemia level was 41.4%. The complete 18S ribosomal RNA gene of the parasite was amplified from specimens of his whole blood by polymerase chain reaction. Phylogenetic analysis showed the parasite is most closely related, but not identical, to B. divergens (similarity score, 99.5%), a bovine parasite in Europe. By indirect fluorescent-antibody testing, his serum reacted to B. divergens but not to B. microti or WA1 antigens. This case demonstrates that babesiosis can be caused by novel parasites detectable by manual examination of blood smears but not by serologic or molecular testing for B. microti or WA1-type parasites

Tuberculosis Outbreak Investigations in the United States, 2002–2008

To understand circumstances of tuberculosis transmission that strain public health resources, we systematically reviewed Centers for Disease Control and Prevention (CDC) staff reports of US outbreaks in which CDC participated during 2002–2008 that involved >3 culture-confirmed tuberculosis cases linked by genotype and epidemiology. Twenty-seven outbreaks, representing 398 patients, were reviewed. Twenty-four of the 27 outbreaks involved primarily US-born patients; substance abuse was another predominant feature of outbreaks. Prolonged infectiousness because of provider- and patient-related factors was common. In 17 outbreaks, a drug house was a notable contributing factor. The most frequently documented intervention to control the outbreak was prioritizing contacts according to risk for infection and disease progression to ensure that the highest risk contacts were completely evaluated. US-born persons with reported substance abuse most strongly characterized the tuberculosis outbreaks in this review. Substance abuse remains one of the greatest challenges to controlling tuberculosis transmission in the United States

New evidence for a subshell gap at N = 32

Abstract An 879.9(2) keV γ -ray transition has been identified following the β decay of 58 V and assigned as the 2 58 Cr 34 . A peak in the energies of the first excited 2 + states for the even-even chromium isotopes is now evident at 56 Cr 32 , providing empirical evidence for a significant subshell gap at N = 32. The appearance of this neutron subshell closure for neutron-rich nuclides may be attributed to the diminished π1f 7/2 -ν1f 5/2 monopole proton-neutron interaction as protons are removed from the 1f 7/2 single-particle orbital. 2001 Elsevier Science B.V. All rights reserved. PACS: 21.60.Cs; 23.20.Lv; 27.40.+z Trends in nuclear masses and binding energies have suggested nuclei associated with nucleon numbers expected to be maximum at midshell. However, the development of collectivity away from major closed shells may be inhibited by the presence of subshell closures, or minor shell gaps. In order to study such phenomena, experimental probes of quadrupole collectivity may be utilized. One measure of the extent of quadrupole collectivity in even-even nuclear systems is the energy of the first excited 2 + state, E(2 + 1 ). According to Grodzins [2

Interventions to improve contact tracing for tuberculosis in specific groups and in wider populations: an evidence synthesis

Background The tracing and screening of people who have had contact with an active case of tuberculosis (TB) is an important element of TB control strategies. Objectives This study aimed to carry out a review of evidence regarding TB contact tracing, with a particular emphasis on research that was applicable to TB contact tracing in specific population groups in the UK. Design An evidence synthesis of literature of any study design on TB contact tracing in developed countries was carried out. Setting Any setting. Population Individuals found to have active TB disease, and people who have come into contact with them. Interventions Contact-tracing investigations. Main outcome measures Any outcome related to TB infection, contact investigations and/or the views of staff, people with TB disease, or their contacts. Data sources Searches for research published 1995 onwards were undertaken in the following databases: MEDLINE via Ovid SP, EMBASE via Ovid SP, EconLit via Ovid SP, PsycINFO via Ovid SP, Social Policy and Practice via Ovid SP, Cumulative Index to Nursing and Allied Health Literature via EBSCOhost, Science and Social Science Citation Indices via Web of Science and The Cochrane Library via Wiley Online Library. Review methods The study comprised a review of TB contact tracing in specific population groups and a review in wider populations. A narrative synthesis was completed and a logic model was developed from the literature. Results There were 112 articles in the review: 23 related to specific populations and 89 related to wider populations. The literature was of limited quality, with much general description of investigations. We identified only two (uncontrolled) studies that could be considered evaluative. Although the limitations of the evidence should be recognised, the review suggested the following: the value of a location-based approach, working with local communities and the media, partnership working, using molecular epidemiological testing, ensuring adequate systems and addressing fear of stigma. The literature on investigations for specific populations has much concordance with that reporting findings from wider population groups. The recognised limitations of conventional investigation methods may, however, be exacerbated in specific populations. Limitations The English-language inclusion criterion may have limited the breadth of countries represented. A meta-analysis was not possible owing to the nature of the literature. Relevant studies may have been missed by our searches, which used terminology relating to contact tracing rather than to active case finding or screening. Conclusions The review identified a sizeable volume of literature relating to contact investigations. However, it is currently predominantly descriptive, with little evaluative work underpinning investigations in either specific or wider populations. Our findings are, therefore, based on limited evidence. Further research is required if robust conclusions are to be made. Future work Research should further explore the development of measures that can be used to compare the effectiveness of different contact investigations, in studies using evaluative designs