On Mean-Field Theory of Quantum Phase Transition in Granular Superconductors

In previous work on quantum phase transition in granular superconductors, where mean-field theory was used, an assumption was made that the order parameter as a function of the mean field is a convex up function. Though this is not always the case in phase transitions, this assumption must be verified, what is done in this article

The detection of stellar velocity dispersion drops in the central regions of five isolated Seyfert spirals

We analyze the kinematics of the central regions of five isolated Seyfert spiral galaxies from the DEGAS sample (four with new data presented in this paper, IC184, UGC3223, NGC2639, NGC6814, and NGC6951 from our previous data), by using long slit spectroscopy in the CaII triplet range (at ~ 8600 A) obtained with a 4m-class telescope. A drop of the velocity dispersions in the innermost 1-3 arcsec is observed in four of them, and hinted in the remaining galaxy (NGC6814). The available HST images for our sample together with another nine galaxies with reported velocity dispersion drops, are also used to investigate the presence of morphological inner structures at the scales of the kinematical drops. Evidence for disk-like shapes is found in 12 out of the 14 cases. The only exceptions are NGC6814 and NGC6951. Existing N-body simulations including stars, gas and star formation predict that such a drop is most probably due to a young stellar population born from dynamically cold gas accreted in a circumnuclear disk formed during an episode of central gas accretion driven by a bar. The equivalent widths of the Calcium triplet lines for our 5 galaxies have been measured. Even if the profiles could be formally consistent with constant EW(CaT) values, they seem to indicate the presence of a local maximum in the regions corresponding spatially to the drops; if confirmed, this would imply the presence of a different stellar population, whose properties could help constraining the models.Comment: A&A accepted for publicatio

Dual-Time-Constant Phase-Conjugate Dynamics in Cr3+:Er3+:YAIO3

NRC publication: Ye

Desempenho das competências obstétricas na admissão e evolução do trabalho de parto: atuação do profissional de saúde Desempeño de las competencias obstétricas en la admisión y evolución del trabajo de parto: actuación del equipo de salud Performance of obstetrical competences upon admission and during labor: performance of the health team

O objetivo deste estudo foi identificar os profissionais de saúde e suas competências no atendimento às parturientes no momento de admissão na maternidade e durante a evolução do trabalho de parto e discutir as competências da equipe de enfermagem nesse atendimento. Foi realizado nas duas maternidades de Rio Branco-AC. A coleta de dados foi realizada em julho de 2005, por meio de observações das competências essenciais em obstetrícia desenvolvidas pelos profissionais de saúde. A estatística descritiva e o teste exato de Fisher foram usados para análise dos dados. Os resultados evidenciaram que os profissionais de enfermagem de nível médio e médicos atuam na admissão e no trabalho de parto. O estudo revela que as instituições apresentam modelos diferenciados quanto a quem cabe a responsabilidade da execução de determinadas competências na atenção à parturiente, não priorizam a qualificação profissional para a assistência à mulher no trabalho de parto.<br>La finalidad de este estudio fue identificar los profesionales de salud y sus competencias en la atención a las parturientes cuando de su admisión en la maternidad y durante la evolución del trabajo de parto; y discutir las competencias del equipo de enfermería en la atención a las parturientes cuando de su admisión en la maternidad y durante la evolución del trabajo de parto. Fue realizado en las dos maternidades del municipio de Rio Branco, Brasil. La recolecta de datos fue realizada en julio de 2005, mediante observaciones sistemáticas de las competencias esenciales en obstetricia desarrolladas por los profesionales de salud. La estadística descriptiva y el teste exacto de Fisher fueron usados para análisis de los datos. Los resultados evidenciaron que los profesionales de enfermería de nivel secundario y médicos actúan en la admisión y en el trabajo de parto. El estudio revela que las instituciones presentan distintos modelos en cuanto a quien es responsable por la ejecución de ciertas competencias en la atención a la parturiente, y no priorizan la calificación profesional para la atención a la mujer en trabajo de parto.<br>This study aimed to identify health professionals and competencies in care delivery to parturient women when admitted at the maternity and during the evolution of labor; and discuss nursing team competencies in care delivery to parturient women when admitted at the maternity and during the evolution of labor. It was carried out in the two maternities of Rio Branco, Brazil. Data were collected in July 2005, through systematic observations of essential competences in obstetrics developed by the health professionals. Descriptive statistics and Fisher's exact test were used for data analysis. Results evidenced that nursing professionals with secondary education degree and physicians act in the admission and during labor. The study reveals that institutions present distinct models regarding who is responsible to perform certain competences in care to parturient and do not prioritize professional qualification for care to woman during labor

Tentativas de suicídio em um hospital geral no Rio de Janeiro, Brasil Suicide attempts recorded at a general hospital in Rio de Janeiro, Brazil

A história pregressa de tentativa de suicídio é um importante preditor do suicídio e de novas tentativas. Este artigo apresenta o perfil dos casos de tentativas de suicídio detectados por meio de um sistema de monitoramento para esses agravos em um hospital geral no Rio de Janeiro, Brasil. Entre abril de 2001 e março de 2002 foram registrados 160 tentativas de suicídio, sendo 68% entre mulheres e 26% entre adolescentes. A ingestão de pesticidas e o abuso de medicamentos foram os principais métodos utilizados. Mulheres utilizaram os dois métodos na mesma proporção, enquanto 2/3 dos homens empregaram pesticidas. Em relação à prevalência dos fatores de risco para tentativas de suicídio, identificou-se que 21% dos pacientes haviam procurado serviços de saúde nos trinta dias anteriores ao evento, 28% referiram tentativas anteriores, 23% fizeram referência a casos de tentativas ou suicídio na família. Ainda que os dados populacionais disponíveis sejam escassos, as tentativas de suicídio parecem ser um evento importante de morbidade, particularmente entre adolescentes e adultos jovens. Sistemas de vigilância para esse agravo podem ser úteis para um melhor conhecimento do problema.<br>Previous suicide attempts are an important predictor of both repeated attempts and suicide. This paper presents the profile of patients who had attempted suicide and were admitted to a general hospital in Rio de Janeiro, Brazil. From April 2001 to March 2002, 160 suicide attempts were recorded (68% women; 26% adolescents). Ingestion of pesticides and prescription drugs were the two most common methods used. The two methods had been used by similar numbers of women, while two-thirds of men had used pesticides. As for prevalence of factors associated with attempted suicide, 21% of patients had been in contact with health services within 30 days prior to the event, 28% mentioned previous suicide attempts, and 23% reported other cases of suicide or attempts in the family. Despite the limited data in Brazil, suicide attempts appear to be an important health problem, particularly among youth. Surveillance systems for suicide attempts could help expand knowledge on this problem