115 research outputs found

    Cross sections for collisions of low-energy electrons with the hydrides PH3, AsH3, SbH3, SnH4, TeH2, and HI

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    We calculated integral and differential cross sections for scattering of low-energy electrons by two groups of hydrides from 10 to 30 eV. The first group is composed by the hydrides of elements in the same column of the Periodic Table and includes PH3, AsH3, and SbH3. The second group is formed by hydrides in the same row and includes SnH4, SbH3, TeH2, and HI. The calculations employed the Schwinger multichannel method with norm-conserving pseudopotentials [M.H.F. Bettega, L.G. Ferreira, and M.A.P. Lima, Phys. Rev. A 47, 1111 (1993)]. Our goal is to find similarities and differences in the cross sections in these two groups. (C) 1996 American Institute of Physics.10531029103

    Electronic excitation of XH4 (X = C,Si,Ge,Sn,Pb) by electron impact

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    We calculate integral cross sections for the electronic excitation to the T-3(2) states of XH4 (X= C,Si,Ge,Sn,Pb) by electron impact. This is the lowest-lying excited state of these molecules. Our results were obtained with the Schwinger multichannel method with pseudopotentials at the two-state level of approximation. In the case of CH4 we compare our results with previous results of an all-electron calculation obtained at the same level of approximation, in which case we found an excellent agreement between the two calculations. Though these molecules are very similar, after discarding the cores, as the pseudopotential technique does, the inelastic cross sections are very distinctive and do not have a monotonic behavior with increasing proton number Z of the central atom.5764987499

    25-state calculation for e(-)-Na-2 scattering

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    We use the Schwinger multichannel method with pseudopotentials to study low energy e(-)-Na-2 scattering. Our cross sections, for impact energies from 0 to 10 eV, include polarization effects and up to 25 open channels related to all electronic states lying below 3.5 eV. Our results predict prominent threshold effects due to a very intense coupling between the B(1)Pi(u) state and the elastic channel in an energy region where there is no experimental data. Our total 25-state cross sections are in very good agreement with available experimental data for energies below about 4 eV. [S0031-9007(98)07561-9].81183832383

    Low-energy electron collisions with C4H6 isomers

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    We report integral, differential, and momentum-transfer cross sections for elastic scattering of low-energy electrons by C4H6 isomers, namely, 1,3-butadiene, 2-butyne, and cyclobutene. We use the Schwinger multichannel method with pseudopotentials [M. H. F. Bettega, L. G. Ferreira, and M. A. P. Lima, Phys. Rev. A-47, 1111 (1993)] at the static-exchange approximation to compute the cross sections for energies from 10 to 60 eV. In particular, we discuss the isomer effect, reported by experimental studies for isomers Of C3H4 and C4H6. We also calculate the total ionization cross section using the binary-encounter-Bethe model for 2-butyne and 1,3-butadiene, and estimate the inelastic cross section for these two isomers.69

    A comparative study of elastic scattering of low-energy electrons by boron, aluminum and gallium trihalides

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    In this paper we present integral, differential and momentum transfer cross sections for elastic scattering of low-energy electrons by some metal-halogen molecular compounds, namely, BF3, BCl3, BBr3, BI3, AlF3, AlCl3, AlBr3, AlI3, GaF3, GaCl3, GaBr3, and GaI3. The pseudopotential based calculations were carried out with the Schwinger multichannel method at the static-exchange level of approximation. It is the purpose of this work to make a comparative study of the scattering processes involving aluminum and gallium trihalides with previous results for the boron ones [M. H. F. Bettega, Phys. Rev. A 61, 042703 (2000)]. We find through direct comparison of the elastic cross sections that, at low energies, the scattering processes are mainly dominated by the halogen atoms. (C) 2003 American Institute of Physics.1181758

    Compreensão da espiritualidade para os portadores de transtorno mental: contribuições para o cuidado de enfermagem

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    Objetivo: Compreender os significados da espiritualidade para o paciente portador de transtorno mental.Método: Pesquisa qualitativa, fenomenológica com nove usuários do Centro de Atenção Psicossocial em um município do interior de Minas Gerais, em fevereiro de 2014.Resultados: Da análise compreensiva, emergiram duas unidades de significado: A espiritualidade é um suporte terapêutico para a saúde mental; O templo religioso é o local de manifestação da espiritualidade. Verificou-se o suporte oferecido pela religião para o enfrentamento dos problemas de saúde dos usuários e que estes expressam sua crença através de orações, além de frequentarem templos religiosos e apresentarem comportamentos que revelam a fé em Deus e nos santos.Conclusão: Há a necessidade de capacitar os profissionais de saúde, em especial o enfermeiro, para que ofereçam novas práticas assistenciais que contemplem o cuidado espiritual/religioso no conjunto de ações integrais que deve ser oferecido nos serviços de Saúde Mental.Palavras-chave: Espiritualidade. Saúde mental. Enfermagem

    Prácticas del enfermero en el contexto de la atención básica: scoping review

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    Objective: to identify and categorize the practices performed by nurses working in Primary Health Care and Family Health Strategy Units in light of responsibilities established by the profession’s legal and programmatic frameworks and by the Brazilian Unified Health System. Method: a scoping review was conducted in the following databases: LILACS, IBECS, BDENF, CINAHL and MEDLINE, and the Cochrane and SciELO libraries. Original research papers written by nurses addressing nursing practices in the primary health care context were included. Results: the review comprised 30 studies published between 2005 and 2014. Three categories emerged from the analysis: practices in the service; practices in the community; and management and education practices. Conclusion: the challenges faced by nurses are complex, as care should be centered on the population’s health needs, which requires actions at other levels of clinical and health responsibility. Brazilian nursing has achieved important advancements since the implementation of policies intended to reorganize work. There is, however, a need to shift work processes from being focused on individual procedures to being focused on patients so that an enlarged clinic is the ethical-political imperative guiding the organization of services and professional intervention.Objetivo: identificar e categorizar as práticas exercidas pelos enfermeiros junto às Unidades Básicas e às Equipes de Saúde da Família, à luz das atribuições previstas pelos marcos legais e programáticos da profissão e do Sistema Único de Saúde. Método: realizou-se uma revisão da literatura com o método scoping review, nas bases LILACS, IBECS, BDENF, CINAHL e MEDLINE, e nas bibliotecas Cochrane e SciELO. Incluíram-se artigos de pesquisa original, produzidos com enfermeiros, sobre as práticas de enfermagem no contexto dos cuidados de saúde primários. Resultados: a revisão abrangeu trinta estudos publicados entre 2005 e 2014. Da análise, resultaram três categorias: práticas no serviço, práticas na comunidade e práticas de gestão e formação. Conclusão: os desafios dos enfermeiros são complexos, posto que o cuidado deve estar centrado nas necessidades de saúde da população, o que remete à ação para outros níveis de responsabilidade clínica e sanitária. A enfermagem brasileira mostra importantes avanços desde a implantação das políticas de reorganização do trabalho. Necessita, entretanto, avançar no que se refere ao deslocamento dos processos de trabalho, focados em procedimentos individuais, para um processo mais voltado aos usuários, onde a clínica ampliada seja o imperativo ético-político da organização dos serviços e da intervenção profissional.Objetivo: identificar y categorizar las prácticas ejercidas por los enfermeros en las Unidades Básicas y los Equipos de Salud de la Familia, desde el punto de vista de las atribuciones previstas por los marcos legales y programáticos de la profesión y del Sistema Único de la Salud. Método: se realizó una revisión de la literatura con el método scoping review, en las bases LILACS, IBECS, BDENF, CINAHL y MEDLINE, y en las bibliotecas Cochrane y SciELO. Se incluyeron artículos de investigación original, producidos con enfermeros, sobre las prácticas de enfermería en el contexto de los cuidados de salud primarios. Resultados: la revisión abarcó treinta estudios publicados entre 2005 y 2014. Del análisis, resultaron tres categorías: prácticas en el servicio; prácticas en la comunidad; y, prácticas de administración y formación. Conclusión: los desafíos de los enfermeros son complejos, ya que el cuidado debe estar centrado en las necesidades de salud de la población, lo que conduce a la acción para otros niveles de responsabilidad clínica y sanitaria. La enfermería brasileña muestra importantes avances a partir de la implantación de las políticas de reorganización del trabajo. Necesita, entre tanto, avanzar en lo que se refiere al desplazamiento de los procesos de trabajo, enfocados en procedimientos individuales, para un proceso más dirigido a los usuarios, en donde la clínica ampliada sea el imperativo ético político de la organización de los servicios y de la intervención profesional.info:eu-repo/semantics/publishedVersio
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