A note on the robust control of Markov jump linear uncertain systems

This note addresses a robust control problem of continuous-time jump linear Markovian systems subject to-norm bounded parametric uncertainties. The problem is expressed in terms of a H-infinity control problem as in the purely deterministic case. The present formulation is simpler and it contains previous results in the literature as particular cases. Robust state feedback controllers are parameterized by means of a set of linear matrix inequalities. The result is illustrated by solving some examples numerically. Copyright (C) John Wiley Sons, Ltd.23210511

The impact of different DNA extraction kits and laboratories upon the assessment of human gut microbiota composition by 16S rRNA gene sequencing

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Exposure to Domestic and Community Violence and Subjective Well-Being in Adolescents

Abstract There is major exposure to domestic and community violence during adolescence, which has been negatively related to well-being. This work aimed to identify relationships between domestic and community violence and the levels of subjective well-being perceived by adolescents, considering sex and age. The participants were 426 adolescents from public schools in the south of Brazil; 62% were girls, with a mean age of 14.91 years old ( SD = 1.65), who answered one instrument about exposure to violence and another about well-being. Results indicated greater domestic violence exposure among girls and greater community exposure among boys. The age range from 16 to 18 years old was the most exposed to domestic violence. Boys reported greater well-being and less negative affect. Differences in violence exposure may be related to roles of gender in our society. Well-being promotion is highlighted as a resource for confronting violence among adolescents

Solitary metastatic clear cell carcinoma to the spleen

A 57-year-old with a 9-year history of increased abdominal girth, presented with increased abdominal pain, anemia, and acute renal failure. His past medical history was only remarkable for a previous lung cancer 21 years ago that was treated with a right upper lung lobectomy. A computed tomography (CT) scan of the patient's abdomen showed a solitary 20×20×25cm cystic splenic mass. The patient underwent an urgent splenectomy. Intra-operatively a large splenic cystic cavity was found with a solid inferior splenic mass. An exhaustive histological analysis of the splenic mass confirmed a clear cell carcinoma with low malignant potential that likely represented a metastatic lesion from the patient's previous distant lung cancer. Postoperatively the patient recovered well and at 1-year followup the patient demonstrated no further evidence of metastatic disease. This case is extremely unique and provides a very rare example of a metastatic solitary clear cell carcinoma to the spleen, with a presumed latency period of more than 20 years

An analysis of risk factors for arterial hypertension in adolescent students

The objective of the study was to evaluate some risk factors for increases in systemic arterial blood pressure. This transversal study was carried out with 145 individuals from 12 to18 years of age at two state schools in the city of Pico in the state of Piauí in Brazil. The majority were female (62.8%). The median age was 14.8 years (±3.19). It was ascertained that 13 of the subjects (9.0%) were overweight [CI% 73.0-86.0]. Elevations in waist circumference were found in 31 (21.4%) and 76 (52.4%) had elevated arterial blood levels. There was no statistically-significant association between the above-cited risk factors and gender (p=0.088; 0.999; 0.204, respectively). However, 44.8% of the adolescents had at least one risk factor associated with arterial hypertension; 15.9% had two, and 2.1% had three. The study confirms the influence of the risk factors on arterial pressure values among adolescents. Being aware of these factors means that nurses can intervene with health education measures.El objetivo fue evaluar de los algunos factores de riesgo para aumento de los niveles de presión arterial sistémica. Estudio transversal con 145 personas de 12 a 18 años de dos escuelas públicas de la ciudad de Picos-PI. La mayoría eran mujeres (62,8%). La edad media fue de 14,8 años (±3.19). Se encontró 13 (9,0%) tenían exceso de peso [IC% 73,0 a 86,0]. Elevaciones de la circunferencia de cintura se encontraron en 31 (21,4%) y 76 (52,4%) con niveles elevados de presión arterial. No hubo asociación estadísticamente significativa de los factores de riesgo mencionados anteriormente investigado con el sexo (p=0,088, 0,999, 0,204, respectivamente). Sin embargo, 44,8% de los jóvenes tenían al menos un factor; 15,9% dos y 2,1% tres factores relacionados con la hipertensión. Confirma la influencia de factores de riesgo en los valores de presión arterial en la juventud. Delante del conocimiento de estos factores, la enfermería podrá intervenir con medidas de educación en salud.O objetivo do estudo foi avaliar alguns fatores de risco para aumento dos níveis de pressão arterial sistêmica. Trata-se de estudo transversal, desenvolvido com 145 indivíduos de 12 a 18 anos, de duas escolas públicas da cidade de Picos, PI. A maioria era composta por mulheres (62,8%). A média de idade foi de 14,8 anos (±3,19). Verificou-se que 13 (9,0%) apresentavam excesso de peso [IC% 73,0-86,0]. Elevações da circunferência abdominal foram encontradas em 31 (21,4%), e 76 (52,4%) tinham elevação nos níveis de pressão arterial. Não houve associação estatisticamente significante dos fatores de risco investigados citados anteriormente com o sexo (p=0,088; 0,999; 0,204, respectivamente). No entanto, 44,8% dos adolescentes tinham pelo menos um fator, 15,9% dois e 2,1%, três fatores associados indicativos de hipertensão arterial. Confirma-se a influência de fatores de risco sobre os valores da pressão arterial em adolescentes. Diante do conhecimento desses fatores, a enfermagem poderá intervir com medidas de educação em saúde

Intensidade e duração dos esforços físicos em aulas de Educação Física

OBJETIVO: Avaliar a intensidade e a duração dos esforços físicos em aulas de Educação Física no ensino fundamental e médio. MÉTODOS: Estudo transversal de base escolar por meio de observação de 218 aulas de Educação Física, incluindo um total de 272 estudantes (avaliados três vezes cada um). O estudo foi realizado em Pelotas, RS, de agosto a setembro de 2009. Para a intensidade dos esforços, foram utilizados acelerômetros e adotados os pontos de corte (em counts por minuto): atividades sedentárias (0 a 100), leves (101 a 2.000), moderadas (2.001 a 4.999), vigorosas (5.000 a 7.999) e muito vigorosas (&gt; 8.000). RESULTADOS: O tempo médio de duração das aulas foi de 35,6 minutos (dp 6,0). A proporção média de tempo das aulas em atividades físicas de intensidade moderada a vigorosa foi de 32,7% (dp 25,2). Os meninos (44,1%) envolveram-se significativamente mais em atividades físicas moderadas a vigorosas do que as meninas (21,0%; p < 0,01). Estudantes que se envolvem em atividade física fora das aulas tiveram maior participação em atividades físicas moderadas a vigorosas nas aulas de Educação Física. CONCLUSÕES: Além de o tempo da aula de Educação Física ser reduzido, os estudantes praticam atividades físicas de intensidade moderada a vigorosa um terço da aula, com pouca contribuição significativa para o nível de atividade física dos estudantes.OBJECTIVE: To evaluate the intensity and duration of physical efforts in Physical Education classes in primary and secondary school. METHODS: School-based cross-sectional study carried out by means of the observation of 218 Physical Education classes, including a total of 272 students (each one of the students was evaluated three times). The study was carried out in the city of Pelotas (Southern Brazil), between August and December 2009. In order to evaluate the intensity of the efforts, accelerometers were used and the following cut-off points were adopted (in counts per minute): sedentary activities (0-100), light activities (101-2,000), moderate (2,001-4,999), vigorous (5,000-7,999), and very vigorous activities (&gt;8000). RESULTS: The mean duration of the classes was 35.6 minutes (SD 6.0). The mean proportion of time spent in moderate to vigorous physical activity was 32.7% (SD 25.2). Boys (44.1%) were involved significantly more in moderate to vigorous physical activity as compared to girls (21.0%; pOBJETIVO: Evaluar la intensidad y la duración de los esfuerzos físicos en clases de Educación Física en la enseñanza básica y media. MÉTODOS: Estudio transversal de base escolar por medio de observación de 218 clases de Educación Física, incluyendo un total de 272 estudiantes (evaluados tres veces cada uno). El estudio fue realizado en Pelotas, Sur de Brasil, de agosto a septiembre del año 2009. Para la intensidad de los esfuerzos, se utilizaron acelerómetros y se adoptaron los puntos de corte (en counts por minuto): actividades sedentarias (0 a 100), leves (101 a 2.000), moderadas (2.001 a 4.999), vigorosas (5.000 a 7.999) y muy vigorosas (&gt; 8.000). RESULTADOS: El tiempo promedio de duración de las clases fue de 35,6 minutos (de 6,0). La proporción promedio de tiempo de las clases en actividades físicas de intensidad moderada a vigorosa fue de 32,7% (desviación estándar 25,2). Los niños varones (44,1%) se involucraron significativamente en actividades físicas moderadas a vigorosas con relación a las niñas (21,0%;