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Search Results: 1 - 10 of 47416 matches for " Jorge Martins Ribeiro "
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A importancia do bloqueio continental para o futuro de Portugal e do Brasil
Jorge Martins Ribeiro
Revista da Faculdade de Letras : Historia , 2009,
Abstract:
Introdu o ao dossier temático
Jorge Martins Ribeiro
Revista da Faculdade de Letras : Historia , 2009,
Abstract:
Generation of Entropy in Spark Ignition Engines
Bernando Ribeiro,Jorge Martins,António Nunes
International Journal of Thermodynamics , 2007, DOI: 10.5541/ijot.188
Abstract: Recent engine development has focused mainly on the improvement of engine efficiency and output emissions. The improvements in efficiency are being made by friction reduction, combustion improvement and thermodynamic cycle modification. New technologies such as Variable Valve Timing (VVT) or Variable Compression Ratio (VCR) are important for the latter. To assess the improvement capability of engine modifications, thermodynamic analysis of indicated cycles of the engines is made using the first and second laws of thermodynamics. The Entropy Generation Minimization (EGM) method proposes the identification of entropy generation sources and the reduction of the entropy generated by those sources as a method to improve the thermodynamic performance of heat engines and other devices. A computer model created and implemented in MATLAB Simulink was used to simulate the conventional Otto cycle and the various processes (combustion, free expansion during exhaust, heat transfer and fluid flow through valves and throttle) were evaluated in terms of the amount of the entropy generated. An Otto cycle, a Miller cycle (over-expanded cycle) and a Miller cycle with compression ratio adjustment are studied using the referred model in order to evaluate the amount of entropy generated in each cycle. All cycles are compared in terms of work produced per cycle.
Intestinal obstruction induced by a giant incarcerated Spigelian hernia: case report and review of the literature
Ribeiro, Edson Augusto;Cruz Junior, Ruy Jorge;Moreira, Samuel Martins;
Sao Paulo Medical Journal , 2005, DOI: 10.1590/S1516-31802005000300012
Abstract: context: spigelian hernia is an uncommon spontaneous lateral ventral hernia with an incarceration ratio of around 20%. however, complications such as intestinal obstruction are extremely rare. we report on a case of giant incarcerated spigelian hernia with a clinical condition of complete intestinal obstruction that was treated using prosthetic polypropylene mesh. case report: a 72-year-old woman was admitted to the emergency department complaining of diffuse abdominal pain. abdominal examination revealed a firm 10 x 10 cm tender mass in the lower left quadrant, without surrounding cellulite or tenderness. plain abdominal radiographs displayed the formation of levels, thus indicating the existence of intestinal obstruction. an abdominal computed tomography scan clearly showed a fluid and air-filled mass in the soft tissue area of the lower left-side abdominal wall. spigelian incarcerated hernia was diagnosed and the patient underwent emergency surgical repair by means of local incision. the large defect in the abdominal wall was closed up as successive anatomical layers, and a prosthetic polypropylene mesh was set into the lateral aspect of the rectus sheath. the postoperative course was uneventful and the patient was discharged on the seventh postoperative day.
Influence of muscle fitness test performance on metabolic risk factors among adolescent girls
Jorge Mota, Susana Vale, Clarice Martins, Anelise Gaya, Carla Moreira, Rute Santos, José C Ribeiro
Diabetology & Metabolic Syndrome , 2010, DOI: 10.1186/1758-5996-2-42
Abstract: A total of 229 girls (aged 12-15 years old) comprised the sample of this study. Anthropometric data (height, body mass, waist circumference) were collected. Body mass index (BMI) was also calculated. Muscular strength was assessed taking into account the tests that comprised the FITNESSGRAM test battery, i.e. the curl-up and the push-up. Participants were then categorized in one of 3 categories according the number of tests in which they accomplished the scores that allow them to be classified in health or above health zone. The blood pressure [BP], fasting total cholesterol [TC], low density lipoprotein-cholesterol [LDL-C], high density lipoprotein-cholesterol [HDL-C], triglycerides [TG], glucose, and a metabolic risk score (MRS) were also examined. Physical Activity Index (PAI) was obtained by questionnaire.Higher compliance with health-zone criteria (good in the 2 tests), adjusted for age and maturation, were positive and significantly (p ≤ 0.05) associated with height (r = 0.19) and PAI (r = 0.21), while a significant but negative association was found for BMI (r = -0.12); WC (r = -0.19); TC (r = -0.16); TG (r = -0.16); LDL (r = -0.16) and MRS (r = -0.16). Logistic regression showed that who were assigned to MF fittest group were less likely (OR = 0.27; p = 0.003) to be classified overweight/obese and less likely (OR = 0.26; p = 0.03) to be classified as having MRS. This last association was also found for those whom only performed 1 test under the health zone (OR = 0.23; p = 0.02).Our data showed that low strength test performance was associated with increased risk for obesity and metabolic risk in adolescent girls even after adjustment for age and maturation.A lack of physical fitness (PF) has been associated with the development of cardiovascular disease risk factors (CVD) in youth, such as lipid disorders, high blood pressure, insulin resistance among others [1]. This is a cause of concern because CVD risk factors tend to track to adulthood [2] and the proce
O impacto de varia??es na mortalidade por idade e causas sobre os ganhos na esperan?a de vida ao nascer em Santa Catarina, Brasil, nos anos 90
Botega, Laura de Almeida;Ribeiro, Mírian Martins;Machado, Carla Jorge;
Cadernos de Saúde Pública , 2006, DOI: 10.1590/S0102-311X2006000500021
Abstract: this study aimed to analyze the impact of changes in age-related and cause-related mortality on life expectancy at birth in the state of santa catarina, brazil, in the 1990s. data were obtained from the mortality information system (sim) for the three-year periods 1989/1990/1991 and 1998/1999/2000. infant mortality rates and specific mortality rates for individuals > 1 year of age were calculated by gender and cause of death. the pollard method was used to disaggregate the contributions by mortality from different causes and in different ages to life expectancy at birth. the age groups that contributed the most to the increase in life expectancy at birth were 0-1 year and > 70 years. the causes of death that most contributed to this increase were chronic non-communicable diseases, such as cardiovascular diseases, in the age brackets above 35 years, and neonatal diseases in the < 1-year bracket. finally, there were a high proportion of deaths from ill-defined causes, indicating that the true cause-related mortality structure in the state is still unknown.
Características das fun??es orais de indivíduos com má oclus?o Classe III e diferentes tipos faciais
Pereira, Andriele Cristiane;Jorge, Tatiane Martins;Ribeiro Júnior, Paulo Domingos;Berretin-Felix, Giédre;
Revista Dental Press de Ortodontia e Ortopedia Facial , 2005, DOI: 10.1590/S1415-54192005000600013
Abstract: aim: the present study aims at investigating whether the facial pattern may cause any alterations in the performance of breathing, mastication, deglutition and speaking functions in individuals with class iii skeletal malocclusion. method: data from evaluation of 50 adult patients with class iii malocclusion were analyzed, of which 25 were dolicocephalic and 15 mesocephalic. aspects related with the habitual posture of the lips and tongue, breathing manner, masticatory type, deglutition and speaking pattern were also considered. results: the altered posture of the lips was significantly higher for the dolicocephalic group, whereas the tongue posture on the floor of the mouth was predominant in both groups considered. as for the breathing manner, it could be observed that the oral or oro-nasal manner was significantly higher for the dolicocephalic group. the presence of tongue interposition in deglutition showed itself related with the occurrence of fronting of the tongue in speech. conclusions: the dolicocephalic type contributes towards the occurrence of alterations in the habitual lip posture as well as in the breathing and speaking functions, while the mesocephalic type has influenced the deglutition characteristics in individuals with class iii skeletal malocclusion.
O impacto de varia es na mortalidade por idade e causas sobre os ganhos na esperan a de vida ao nascer em Santa Catarina, Brasil, nos anos 90
Botega Laura de Almeida,Ribeiro Mírian Martins,Machado Carla Jorge
Cadernos de Saúde Pública , 2006,
Abstract: O objetivo deste estudo foi analisar o impacto de varia es na mortalidade por idade e causas sobre os ganhos na esperan a de vida ao nascer, em Santa Catarina, Brasil, nos anos 90. Foram utilizados dados do Sistema de Informa es sobre Mortalidade (SIM) para os triênios 1989/1990/1991 e 1998/1999/2000. Calculou-se taxas de mortalidade infantil e taxas específicas para indivíduos de 1 ano ou mais, por sexo e causas de morte. Aplicou-se, ainda, o método de Pollard, que desagregou as contribui es da mortalidade por causas e idades para a varia o da esperan a de vida ao nascer. Os grupos de idade que mais contribuíram para o aumento da esperan a de vida ao nascer foram o de 0 a 1 ano e o de 70 anos e mais. As causas de morte que mais contribuíram para esse aumento foram as cr nico-degenerativas, como circulatórias, nas idades acima de 35 anos, e as afec es neonatais, no primeiro ano de idade. Finalmente, merece aten o a elevada propor o de óbitos por causas mal definidas, o que indica que a verdadeira estrutura de causas de morte no estado é desconhecida.
Síndrome de Brown-Séquard por hérnia discal cervical a duplo nível: caso clínico e revis o da literatura Síndrome de Brown-Séquard por hernia discal cervical en nivel doble: caso clínico y revisión de la literatura Brown-Séquard syndrome by double level cervical disc herniation: case report and review of the literature
Jorge Miguel Silva Ribeiro Olliveira Alves,Paulo Peixoto,Nuno Ferreira,Rui Martins
Coluna/Columna , 2012, DOI: 10.1590/s1808-18512012000300014
Abstract: Descri o do caso clínico de um paciente com síndrome de Brown-Séquard por hérnia de disco cervical em duplo nível, 40 anos, do sexo masculino, sem história de patologia prévia da coluna cervical; teve início insidioso de paresia nos membros direitos, associada à diminui o da sensibilidade dolorosa e térmica do hemicorpo esquerdo, após mergulho que ocasionou trauma indireto da coluna cervical. A RM da coluna cervical mostrou hérnias discais paramedianas direitas nos níveis C4-C5 e C5-C6 com compress o da metade direita do cord o medular e hiperintensidade em T2. Foi realizada descompress o por via anterior e artrodese dos níveis afetados. O paciente recuperou-se parcialmente dos déficits neurológicos, após um longo programa de reabilita o funcional. O tratamento cirúrgico e um programa de reabilita o precoce s o da maior importancia para a recupera o neurológica de paciente com síndrome de Brown-Séquard por hérnia de disco cervical. Descripción del caso clínico de un paciente con síndrome de Brown-Séquard por hernia de disco cervical en nivel doble, 40 a os, del sexo masculino, sin historial de patología previa de la columna cervical; tuvo inicio insidioso de paresia en los miembros derechos, vinculada con la disminución de la sensibilidad dolorosa y térmica del hemicuerpo izquierdo, después de zambullida que ocasionó traumatismo indirecto de la columna vertebral. La RM de la columna cervical mostró hernias discales paramedianas derechas, en los niveles C4-C5 y C5-C6, con compresión de la mitad derecha del cordón medular e hiperintensidad en T2. Se realizó descompresión por vía anterior y artrodesis de los niveles afectados. El paciente se recuperó, parcialmente, de los déficits neurológicos, después de un programa prolongado de rehabilitación funcional. El tratamiento quirúrgico y un programa de rehabilitación precoz son de máxima importancia para la recuperación neurológica del paciente con síndrome de Brown-Séquard por hernia de disco cervical. This article presents a case in which Brown-Séquard syndrome resulted from a double level cervical disc herniation. A 40-year-old man without previous history of cervical pathology, presented with insidious right arm and leg paresis associated with associated with decreased pain and thermal sensitivity in the left hemibody after diving which caused indirect trauma of the cervical spine. Magnetic resonance imaging of the cervical spine showed double level disc herniation in C4-C5 and C5-6 with compression of the right half of spinal cord and hyperintensity in T2-weighted images. After a complete decompressi
Produ??o e qualidade do leite em sistemas de produ??o da regi?o leiteira de Pelotas, RS, Brasil
Martins, Paulo Ricardo Garcia;Fischer, Vivian;Ribeiro, Maria Edi Rocha;Gomes, Jorge Fainé;Stumpf Jr, Waldyr;Zanela, Maira Balbinotti;
Ciência Rural , 2007, DOI: 10.1590/S0103-84782007000100034
Abstract: this research was aimed at characterizing milk yield and quality of three production systems at pelotas dairy region. from september 2001 up to august 2002, nine dairy production units were visited for 11 months. production units were classified as specialized (s), partially specialized (ps) and non-specialized (ns). bulk tank milk was sampled to analyze physical and chemical attributes and somatic cells count (scc). mastitis percentage and 4% fat-corrected milk yield were evaluated. a completely randomized split-plot design was adopted. cryoscopic index differed between specialized and non-specialized systems (p<0.10), but all values were within the normal range. specialized system showed lower mastitis occurrence than partially specialized and non-specialized systems (p<0.10). production systems did not differ for 4% fat-corrected milk yield, contents of protein, casein, fat, lactose, solids non-fat, total solids, non-protein nitrogen, as well as titrable acidity and somatic cells count. higher technology level application reduced mastitis occurrence, contributing to a better milk quality.
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