Absence of Klein's paradox for massive bosons coupled by nonminimal vector interactions

A few properties of the nonminimal vector interactions in the Duffin-Kemmer-Petiau theory are revised. In particular, it is shown that the space component of the nonminimal vector interaction plays a peremptory role for confining bosons whereas its time component contributes to the leakage. Scattering in a square step potential with proper boundary conditions is used to show that Klein's paradox does not manifest in the case of a nonminimal vector coupling

SIMULAÇÃO DE PRODUÇÃO DE SEDIMENTOS COM A UTILIZAÇÃO O MODELO SWAT NA BACIA DO RIO DAS PEDRAS (GUARAPUAVA-PR)

O objetivo destes trabalho em analisar a produção sedimentos, na bacia do Rio das Pedras no município de Guarapuava-PR, com auxílio do programa modelagem hidrossedimentológico SWAT. A importância deste trabalho é justificada pois, o conhecimento dos processos hidrossedimentológicos na escala de bacia hidrográfica e o uso e de um modelo que auxilia na indicação de práticas de uso e manejo dos solos no âmbito da redução dos problemas ambientais

Cirurgia Com Tela Para Correção De Prolapso De Parede Anterior: Metanálise

Purpose Pelvic organ prolapse (POP) is a major health issue worldwide, affecting 6–8% of women. The most affected site is the anterior vaginal wall. Multiple procedures and surgical techniques have been used, with or without the use of vaginal meshes, due to common treatment failure, reoperations, and complication rates in some studies. Methods Systematic review of the literature and meta-analysis regarding the use of vaginal mesh in anterior vaginal wall prolapse was performed. A total of 115 papers were retrieved after using the medical subject headings (MESH) terms: ‘anterior pelvic organ prolapse OR cystocele AND surgery AND (mesh or colporrhaphy)’ in the PubMed database. Exclusion criteria were: follow-up shorter than 1 year, use of biological or absorbable meshes, and inclusion of other vaginal wall prolapses. Studies were put in a data chart by two independent editors; results found in at least two studies were grouped for analysis. Results After the review of the titles by two independent editors, 70 studies were discarded, and after abstract assessment, 18 trials were eligible for full text screening. For final screening and meta-analysis, after applying the Jadad score ( > 2), 12 studies were included. Objective cure was greater in the mesh surgery group (odds ratio [OR] = 1,28 [1,07–1,53]), which also had greater blood loss (mean deviation [MD] = 45,98 [9,72–82,25]), longer surgery time (MD = 15,08 [0,48–29,67]), but less prolapse recurrence (OR = 0,22 [01,3–0,38]). Dyspareunia, symptom resolution and reoperation rates were not statistically different between groups. Quality of life (QOL) assessment through the pelvic organ prolapse/urinary incontinence sexual questionnaire (PISQ-12), the pelvic floor distress inventory (PFDI-20), the pelvic floor impact questionnaire (PFIQ-7), and the perceived quality of life scale (PQOL) was not significantly different. Conclusions Anterior vaginal prolapse mesh surgery has greater anatomic cure rates and less recurrence, although there were no differences regarding subjective cure, reoperation rates and quality of life. Furthermore, mesh surgery was associated with longer surgical time and greater blood loss. Mesh use should be individualized, considering prior history and risk factors for recurrence. © 2016 by Thieme Publicações Ltda, Rio de Janeiro, Brazil.38735636

Cirurgia com tela para correção de prolapso de parede anterior: metanálise

Pelvic organ prolapse (POP) is a major health issue worldwide, affecting 6–8% of women. The most affected site is the anterior vaginal wall. Multiple procedures and surgical techniques have been used, with or without the use of vaginal meshes, due to common treatment failure, reoperations, and complication rates in some studies. Methods Systematic review of the literature and meta-analysis regarding the use of vaginal mesh in anterior vaginal wall prolapse was performed. A total of 115 papers were retrieved after using the medical subject headings (MESH) terms: ‘anterior pelvic organ prolapse OR cystocele AND surgery AND (mesh or colporrhaphy)’ in the PubMed database. Exclusion criteria were: follow-up shorter than 1 year, use of biological or absorbable meshes, and inclusion of other vaginal wall prolapses. Studies were put in a data chart by two independent editors; results found in at least two studies were grouped for analysis. Results After the review of the titles by two independent editors, 70 studies were discarded, and after abstract assessment, 18 trials were eligible for full text screening. For final screening and meta-analysis, after applying the Jadad score ( > 2), 12 studies were included. Objective cure was greater in the mesh surgery group (odds ratio [OR] = 1,28 [1,07–1,53]), which also had greater blood loss (mean deviation [MD] = 45,98 [9,72–82,25]), longer surgery time (MD = 15,08 [0,48–29,67]), but less prolapse recurrence (OR = 0,22 [01,3–0,38]). Dyspareunia, symptom resolution and reoperation rates were not statistically different between groups. Quality of life (QOL) assessment through the pelvic organ prolapse/urinary incontinence sexual questionnaire (PISQ-12), the pelvic floor distress inventory (PFDI-20), the pelvic floor impact questionnaire (PFIQ-7), and the perceived quality of life scale (PQOL) was not significantly different. Conclusions Anterior vaginal prolapse mesh surgery has greater anatomic cure rates and less recurrence, although there were no differences regarding subjective cure, reoperation rates and quality of life. Furthermore, mesh surgery was associated with longer surgical time and greater blood loss. Mesh use should be individualized, considering prior history and risk factors for recurrence.387356364Prolapso de órgãos pélvicos é problema de saúde públicas, sendo o mais comum o anterior. Para tratamento são utilizadas cirurgias, com ou sem telas. O uso de telas é para diminuir recidivas, mas não h á consenso. Métodos: Foi realizada revisão da literatura e metanálise, sobre uso de telas na correção do prolapso anterior. Base de dados foi PUBMED , com termos (MESH): “Anterior Pelvic Organ OR Cystocele AND Surgery AND (Mesh or Colporrhaphy)”. Critérios de exclusão foram: seguimento menor que 1 ano, telas biológicas ou absorvíveis. Resultados: foram avaliados 115 artigos. Após revisão dos títulos, 70 estudos foram descartados e 18 após leitura de resumos. Após critérios de Jadad (>2), 12 estudos foram incluídos. Análise estatística foi razão de risco ou diferença entre médias dos grupos, e as análises com grande heterogeneidade foram avaliadas através de análise de efeito aleatório. Resultados: Cura objetiva foi superior no grupo com tela - OR 1,28 (1,07-1,53, p ≤ 0,00001), maior perda sanguínea - diferença média (MD) 45,98 (9,72-82,25, p = 0,01), tempo cirúrgico mais longo - MD 15,08 (0,48-29,67, p = 0,04), porém menor recorrência - OR 0,22 (0,13-0,38, p = 0,00001), não apresentando maior resolução dos sintomas - OR 1,93 (0,83-4,51, p = 0,15). Dispareunia e taxa de reoperação também não foram diferentes entre grupos. Qualidade de vida não apresentou diferença. Conclusões: Cirurgia com tela para prolapso vaginal anterior apresenta melhor taxa de cura anatômica e menor recorrência, sem diferenças cura subjetiva, reoperação e qualidade de vida. Há maior tempo cirúrgico e perda sanguínea. Uso de telas deve ser individualizado

Effects due to a scalar coupling on the particle-antiparticle production in the Duffin-Kemmer-Petiau theory

The Duffin-Kemmer-Petiau formalism with vector and scalar potentials is used to point out a few misconceptions diffused in the literature. It is explicitly shown that the scalar coupling makes the DKP formalism not equivalent to the Klein-Gordon formalism or to the Proca formalism, and that the spin-1 sector of the DKP theory looks formally like the spin-0 sector. With proper boundary conditions, scattering of massive bosons in an arbitrary mixed vector-scalar square step potential is explored in a simple way and effects due to the scalar coupling on the particle-antiparticle production and localization of bosons are analyzed in some detail

Estabilidad del círculo meridiano del OAFA

Se analizan variaciones de la inclinación y del azimut y sus correlaciones con la temperatura, desde 1969 hasta 1975.Asociación Argentina de Astronomí

Cuarto catálogo círculo meridiano San Juan

The polar coordinates during the period 1972-1975 were calculated, every five days, with the time and latitude results of Punta Indio and Mount Stromlo Photographic Zenith Tubes and San Juan and Santiago de Chile Astrolabes.Asociación Argentina de Astronomí

Center of pressure displacements in individual swith Down syndrome during a bipedal position

Objetivo:Valorar el equilibrio de adultos con síndrome de Down a través del estudio del desplazamiento del centro depresiones. Método: Estudio transversal de casos y controles. Doce sujetos con síndrome de Down y 12 sin síndrome de Down formaron parte del estudio. Todos los participantes realizaron 2 pruebas sobre plataforma dinamométrica: i)estática con ojos abiertos y ii) estática con ojos cerrados. Las señales del centro de presiones fueron analizadas en el dominio temporal. Se utilizaron contrastes no paramétricos para el análisis estadístico de los datos Resultados:Los resultados mostraron diferencias significativas entre- grupos en las variables rango ante-roposterior, fuerza anteroposterior y fuerzamedio-lateral(p<0.05). Las comparaciones intragrupos mostraron peores resultados en las pruebas con ojos cerrados en ambos grupos. Conclusión:En el presente trabajo las personas con síndrome de Down presentaron un control del equilibrio mermado al compararlo con sujetos sin síndrome de Down. Los datos obtenidos no son concluyentes para determinar cuál de los sistemas involucrados en el control del equilibrio es el responsable de estos resultados.Objective: To evaluate body balance of adults with Down syndrome based on the analysis of their centre of pressure behaviour. Method: Cross-sectional case control-study. Twelve individuals with Down syndrome and twelve without Down syndrome took part in the study. All the participants were tested under two conditions on a force plate: i) static with eyes open and ii) static with eyes closed. Centre of pressure signals were analyzed in time domain. Non-parametric contrasts were used for statistical analysis. Results: Statistical differences between groups were found in anteroposterior range, anterior-posterior force and medio-lateral force (p < 0.05). Within-groups comparisons showed poorer results in eyes closed conditions for both groups. Conclusion: Individuals with Down syndrome involved in the present study showed deficits in balance control when compared with people without Down syndrome. The obtained data are not conclusive. The participation of the different systems which control balance in people with Down syndrome remains unknownObjetivo: Avaliar o equilíbrio de adultos com síndrome de Down através do estudo do desprendimento do centro de pressão. Método: Estudo transversal de caso e controlos. Doze sujeitos com SD e 12 sem Síndrome de Down fizeram parte do estudo. Todos os participantes realizaram 2 provas sobre plataforma dinamométrica: i) estática com olhos abertos e ii) estática com olhos fechados. Os sinais dos centros de pressões foram analisados em domínio temporal. Foram utilizados testes não paramétricos para a análise estatística dos dados. Resultados: Os resultados mostraram diferenc¸ as significativas entre grupos nas variáveis de intervalo ântero-posterior, forc¸ a ântero-posterior e forc¸ a médio-lateral (p < 0.05). As comparac¸ ões intragrupos mostram piores resultados nas provas de equilíbrio com olhos fechados para ambos os grupos. Conclusão: No presente estudo, as pessoas com Síndrome de Down apresentaram um controlo de equilíbrio diminuído em comparac¸ ão a sujeitos sem Síndrome de Down. Os dados obtidos não são conclusivos paradeterminar qualdos sistemas envolvidosno controlodo equilíbrio é responsávelpor estes resultado

Statistical disclosure control in tabular data

Data disseminated by National Statistical Agencies (NSAs) can be classified as either microdata or tabular data. Tabular data is obtained from microdata by crossing one or more categorical variables. Although cell tables provide aggregated information, they also need to be protected. This chapter is a short introduction to tabular data protection. It contains three main sections. The first one shows the different types of tables that can be obtained, and how they are modeled. The second describes the practical rules for detection of sensitive cells that are used by NSAs. Finally, an overview of protection methods is provided, with a particular focus on two of them: “cell suppression problem” and “controlled tabular adjustment”.Postprint (published version