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Search Results: 1 - 10 of 46269 matches for " Luiz Alberto Vieira "
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An Application of Paraconsistent Annotated Logic for Design Software Testing Strategies  [PDF]
Marcos Ribeiro do Nascimento, Luiz Alberto Vieira Dias, Joao Inacio Da Silva Filho
Journal of Software Engineering and Applications (JSEA) , 2014, DOI: 10.4236/jsea.2014.75034
Abstract: Nowadays, application model systems for decision-making based on non-classical logic such as Paraconsistent Logic are used successfully in the treatment of uncertainties. The method presented in this paper is based on the fundamental concepts of Paraconsistent Annotated Logic with annotation of 2 values (PAL2v). In this study, two algorithms based on PAL2v are presented gradually, to extract the effects of the contradiction in signals of information from a database of uncertain knowledge. The Paraconsistent Extractors Algorithms of Contradiction Effect-Para Extrctr is applied to filters of networks of analyses (PANets) of signal information, where uncertain and contradictory signals may be found. Software test case scenarios are subordinated to an application model of Paraconsistent decision-making, which provides an analysis using Paraconsistent Logic in the treatment of uncertainties for design software testing strategies. This quality-quantity criterion to evaluate the software product quality is based on the characteristics of software testability analysis. The Para consistent reasoning application model system presented in this case study, reveals itself to be more efficient than the traditional methods because it has the potential to offer an appropriate treatment to different originally contradicting source information.
Narrowed lumen of the right coronary artery in chronic chagasic patients is associated with ischemic lesions of segmental thinnings of ventricles
Vieira Sambiase,Nadia; Lourdes Higuchi,Maria; Benvenuti,Luiz Alberto;
Investigación Clínica , 2010,
Abstract: thinning of myocardial segments, mainly at the apex and basal posterior region of left ventricle, are frequent lesions in chronic chagasic cardiopathy (ccc), but still without a well determined etiology. previously we found severe myocardial microvascular dilatation that could cause ischemia in watershed regions. in this study we analyzed whether narrowness in epicardial coronary arteries in ccc might explain these thinned ventricular lesions. two groups of dilated hearts with similar weights were compared: eleven hearts from patients with ccc versus four hearts from patients with dilated cardiomyopathy (idcm). as normal controls we studied three non dilated normal weight hearts. there were no atherosclerotic plaques in the main branches of epicardial coronary arteries and cross-sectional luminal areas of proximal and distal segments were histologically measured. it was found that ccc hearts presented a lower mean luminal area in the right coronary artery (rca) branch than idcm, in proximal (4.3 ± 1.4 vs 6.6 ± 2.0 mm2; p= 0.02) and in distal (1.6 ± 1.0 vs 3.4 ± 0.9 mm2; p= 0.01) segments, with no statistical differences with normal hearts (2.7 ± 1.3 and 1.5 ± 0.3 mm2) in proximal (p= 0.2) and distal (p=0.11) sections. in conclusion thinning of ventricular wall in ccc patients seems to be ischemic lesions in the peripheral territory irrigated by the right coronary artery, possibly due to a steal phenomenon by the left coronary, induced by micro vessels dilatation
Narrowed lumen of the right coronary artery in chronic chagasic patients is associated with ischemic lesions of segmental thinnings of ventricles El lumen estrecho de la arteria coronaria derecha en pacientes chagásicos crónicos está asociado con lesiones de adelgazamientos segmentales de los ventrículos
Nadia Vieira Sambiase,Maria Lourdes Higuchi,Luiz Alberto Benvenuti
Investigación Clínica , 2010,
Abstract: Thinning of myocardial segments, mainly at the apex and basal posterior region of left ventricle, are frequent lesions in chronic chagasic cardiopathy (CCC), but still without a well determined etiology. Previously we found severe myocardial microvascular dilatation that could cause ischemia in watershed regions. In this study we analyzed whether narrowness in epicardial coronary arteries in CCC might explain these thinned ventricular lesions. Two groups of dilated hearts with similar weights were compared: eleven hearts from patients with CCC versus four hearts from patients with dilated cardiomyopathy (IDCM). As normal controls we studied three non dilated normal weight hearts. There were no atherosclerotic plaques in the main branches of epicardial coronary arteries and cross-sectional luminal areas of proximal and distal segments were histologically measured. It was found that CCC hearts presented a lower mean luminal area in the right coronary artery (RCA) branch than IDCM, in proximal (4.3 ± 1.4 vs 6.6 ± 2.0 mm2; p= 0.02) and in distal (1.6 ± 1.0 vs 3.4 ± 0.9 mm2; p= 0.01) segments, with no statistical differences with normal hearts (2.7 ± 1.3 and 1.5 ± 0.3 mm2) in proximal (p= 0.2) and distal (p=0.11) sections. In conclusion thinning of ventricular wall in CCC patients seems to be ischemic lesions in the peripheral territory irrigated by the right coronary artery, possibly due to a steal phenomenon by the left coronary, induced by micro vessels dilatation Adelgazamientos segmentares del miocardio son frecuentes lesiones en la cardiomiopatía crónica chagásica (CCC), principalmente en el ápice de la región posterior del ventrículo izquierdo, cuya etiopatogenia todavía no está bien conocida. En trabajos anteriores se observó intensa dilatación de la micro circulación que podría llevar a isquemia en regiones de irrigaciones limítrofes. Este estudio analizó si estrechez de las arterias epicárdicas in CCC podrían explicar las lesiones de adelgazamientos ventriculares. Se compararon 2 grupos de corazones con pesos semejantes: 11 corazones de pacientes con CCC versus 4 corazones de pacientes con cardiomiopatia dilatada idiopática (IDCM). Como controles normales fueran estudiados 3 corazones no dilatados y con pesos normales. No estuvieron presentes placas ateroscleróticas en los principales ramos de las arterias coronarias epicárdicas. Las áreas de lumen en cortes transversales de los segmentos proximales e distales arteriales fueran medidas por histología. Los corazones con CCC mostraron una media de lumen menor en el ramo de la coronaria derecha que en
Evaluation of carbon fiber composites modified by in situ incorporation of carbon nanofibers
Miranda, André Navarro de;Pardini, Luiz Claudio;Santos, Carlos Alberto Moreira dos;Vieira, Ricardo;
Materials Research , 2011, DOI: 10.1590/S1516-14392011005000083
Abstract: nano-carbon materials, such as carbon nanotubes and carbon nanofibers, are being thought to be used as multifunctional reinforcement in composites. the growing of carbon nanofiber at the carbon fiber/epoxy interface results in composites having better electrical properties than conventional carbon fiber/epoxy composites. in this work, carbon nanofibers were grown in situ over the surface of a carbon fiber fabric by chemical vapor deposition. specimens of carbon fiber/nanofiber/epoxy (cf/cnf/epoxy) composites were molded and electrical conductivity was measured. also, the cf/cnf/epoxy composites were tested under flexure and interlaminar shear. the results showed an overall reduction in mechanical properties as a function of added nanofiber, although electrical conductivity increased up to 74% with the addition of nanofibers. thus cf/cnf/epoxy composites can be used as electrical dissipation discharge materials.
Caracteriza o das condi es ambientais de um rio neotropical a partir da densidade, composi o e riqueza de taxa de invertebrados bênticos = Environmental conditions of a neo-tropical river featuring density, composition and taxa richness of bentic invertebrates
Roger Paulo Mormul,Sidnei Pressinatte Junior,Luiz Alberto Vieira,Alexandre Monkolski
Acta Scientiarum : Biological Sciences , 2009,
Abstract: As atividades antrópicas podem causar profundas altera es nas características físicas e químicas dos ambientes aquáticos, assim como na biota. Muitas espécies de invertebrados bent nicos podem auxiliar a indica o dessas altera es. No presente estudo, foi realizada a caracteriza o das condi es ambientais de diferentes pontos do rio 119, Campo Mour o, Paraná, Brasil. Para tanto, foram analisadas condi es físico-químicas da água e coletadas amostras do substrato do rio para análises físicas e biológicas. A densidade, acomposi o e a riqueza dos táxons de invertebrados bênticos encontrados foram utilizadas para diferenciar os pontos quanto às condi es de altera o ambiental. Mudan as na densidade, na composi o e na riqueza foram relatadas em todos os pontos de coleta,principalmente em locais a jusante de áreas alteradas antropicamente. Alguns táxons característicos de locais com boa qualidade de água foram registrados, mas em número inferior ao de táxons que indicam altera es ambientais. Por ser um rio que corta longitudinalmente o perímetro urbano, ele sofre press o antrópica contínua, e a distribui o dos organismos ao longo desse gradiente provavelmente está respondendo às altera es ocorridas em cada local de coleta. Dessa forma, sugere-se a implementa o imediata de um plano de manejo e recupera o para todo o rio ao longo do perímetro urbano. Anthropic activities cause changes in physical and chemical characteristics in aquatic environments, as well as in the biotic component, and several benthic invertebrates species may indicate these changes. In this paper, we characterized the environmental conditions of different sample points in the 119 River, Campo Mour o, State of Paraná, Brazil. Physical and chemical conditions wereanalyzed in water, and samples of the river substrate were collected for physical and biological analysis. Density, composition and taxa richness of benthic invertebrates were used to distinguish the sampling points according to environmental changes. Alterations indensity, composition and richness were reported at all sampling points and samplings, mainly in sites downstream from areas with anthropic changes. Some characteristic taxa of locals with good water quality were recorded, but in smaller numbers compared with taxa that indicate environmental changes. Because the river crosses the urban area, it suffers continuous anthropic pressure and organism distribution throughout this gradient responds to the changes that occur in each sampling point. Thus, our results suggest that animmediate management plan is necessary to
Sucess o de invertebrados durante o processo de decomposi o de duas plantas aquáticas (Eichhornia azurea e Polygonum ferrugineum) = Succession of invertebrates during the decomposition process of two aquatic plants (Eichhornia azurea and Polygonum ferrugineum)
Roger Paulo Mormul,Luiz Alberto Vieira,Sidnei Pressinatte Júnior,Alexandre Monkolski
Acta Scientiarum : Biological Sciences , 2006,
Abstract: A coloniza o de invertebrados durante o período de 56 dias de decomposi o de duas espécies de plantas aquáticas (Eichhornia azurea e Polygonum ferrugineum) foi investigada para determinar o papel de macroinvertebrados no processo de fragmenta o da folha. Durante aanálise do material, foi constatado um total de 2096 invertebrados, associados a E.azurea e 6154 invertebrados associados a P. ferrugineum, identificados dentro de 18 táxons, com predominanciade larvas de Diptera da família Chironomidae, seguido por espécimes de Oligochaeta, microcrustáceos como Cladocera e Copepoda. Em ambas as plantas, os macroinvertebrados mostraram um aumento significativo de densidade ao longo do processo de decomposi o, o que provavelmente está associado à perda de compostos fenólicos. Os resultados sugerem que as espécies de macrófitas apresentam associa es específicas com seus consumidores, ou seja, o processo de sucess o da coloniza o torna-se diferenciado de acordo com as características fenológicas da planta. The invertebrate colonization was investigated during 56-day decomposition of two macrophytes species (Eichhornia azurea andPolygonum ferrugineum). The aim was to determine the role of macroinvertebrates in the process of leaf fragmentation. During material analysis, 2096 invertebrates were associated with E.azureaand 6154 were associated with P. ferrugineum, identified in 18 taxons, with predominance of Diptera larvae (Chironomidae family specially), followed by Oligochaeta species and microcrustaceans such as Cladocera and Copepoda. In both macrophytes the macroinvertebratesshowed a significant increase of density through the process of decomposition, which is probably associated with the loss of phenolic compounds. Results suggest that macrophytes specimens show specific associations with their consumers, i.e., the succession process of colonization becomes singular according to the phenolic characteristics of the plant.
BENTHIC INVERTEBRATES AS PAPAGAIO RIVER WATER QUALITY INDICATOR – CAMPO MOUR O – PR
Alexandre Monkolski, Janet Higuti, Luiz Alberto Vieira, Roger Paulo Mormul e Sidnei Pressinatte Junior
SaBios : Revista de Saúde e Biologia , 2006,
Abstract: The pollutant substance poured in the environment causes negative impacts for life forms that inhabit the sources. The biological monitoring of aquatic ecosystems has as objective the evaluation of the quality of water, in function of alterations of the community of macroinvertebrates. Among these communities Benthic is distinguished, because it reflects the state of conservation or degradation of the sources, changing their morphophysiological characteristics and its presence or absence in water. The quality of Papagaios’ river water was evaluated by physical-chemistry analysis and by density of Benthic macroinvertebrates. Four colleting stations from a stretch of the river were analyzed and samples of sediment and water were collected. At 2nd and 3rd stations there are two cold storage rooms installed at the river’s margins, which treat their effluents in stabilizing lagoons. The 4th station receives the ousting directly from a textile after it has passed by a treatment. Results obtained by biological methods indicated the presence of polluting elements in water. The river’s longitudinal gradient showed a typical sucessorial process of macroinvertebrates from polluted environments, with a significant increase in the density of Oligochaeta and Chironidade, organisms that are tolerant to impacts in water. Considering the four stations that were analyzed, the unwished impacts are occurring in three last ones with more intensity.
Three-dimensional echocardiographic analysis of electromechanical synchrony: comparison with three-dimensional and two-dimensional ejection fraction for evaluation of left ventricular systolic performance
Marcelo Luiz Campos Vieira,Alexandre Ferreira Cury,Gustavo Alberto Frazatto Naccarato,Wercules Antonio Alves de Oliveira
Einstein (S?o Paulo) , 2008,
Abstract: Objective: To compare the three-dimensional echocardiographic analysisof left ventricular (LV) synchrony to LV ejection fraction (LVEF) as measuredby two-dimensional (2D) and three-dimensional (3D) echocardiography(ECHO). Methods: This is a prospective study of 71 patients (41 males,aged 49 ± 11 years), 40 of whom with normal cardiac anatomy (ECHO) andelectrocardiography (ECG) (Group N), and 31 with dilated cardiomyopathy(Group DCM). LVEF, volumes and 16-segment dyssynchrony index % (DI)were measured using 3D-ECHO. LVEF (Simpson’s rule) and volumes weremeasured using 2D-ECHO. Data were compared using Pearson correlationcoefficient (r), 95% CI, linear regression equation and Bland-Altman analysis,p < 0.05. Results: DI% ranged from 0.32 to 21.7% (5.94 ± 6.46), 3D LVEFfrom 0.16 to 0.73 (0.51 ± 0.15); and 2D LVEF from 0.2 to 0.7 (0.47 ± 0.17).The correlation coefficient (r) for DI and 3D LVEF was (r): -0.8203, p <0.0001, CI = -0.8844 to -0.7259, linear regression for DI% (x) and 3D LVEF(y) was y = 63.4515 + (-2.0233) x, p < 0.0001. The correlation coefficient(r) for DI% and 2D LVEF was (r): -0.7046, p < 0.0001, CI = -0.7675 to-0.5824, linear regression for DI% (x) and 2D EF (y) was y = 59.345 +(-3.8721) x, p < 0.0001. Conclusions: Good negative correlation betweenLV synchrony (3D-ECHO) and echocardiographic LVEF (2D and 3D) wasobserved in this series.
Compara??o entre comissurotomia e valvoplastia por cateter-bal?o na estenose mitral: cinco anos de acompanhamento
Cardoso, Luiz Francisco;Grinberg, Max;Pomerantzeff, Pablo Maria Alberto;Rati, Miguel Antonio Neves;Medeiros, Caio Cesar Jorge;Vieira, Marcelo Luiz;Virgen, Luiz;Tarasoutchi, Flávio;
Arquivos Brasileiros de Cardiologia , 2004, DOI: 10.1590/S0066-782X2004001500008
Abstract: objective: to compare clinical and laboratory data in patients with mitral stenosis undergoing open commissurotomy or balloon valvuloplasty, who were followed up for 5 years. methods: eighty-one patients were prospectively assessed prior to the procedure (pre) and immediately after the procedure, in the immediate postoperative period (ipo), and followed up yearly for 5 years (po12m, po24m, po36m, po48m, and po60m). they were randomized into the following 2 groups: gc (group undergoing open commissurotomy): 37 patients (32.4 ± 7.2 years; 89.2% females); and gv (group undergoing balloon valvuloplasty): 44 patients (32.9 ± 9.5 years; 90.9% females). the patients' assessment comprised the following items: functional class, occurrence of events, electrocardiography, and doppler echocardiography. results: a significant improvement in functional class occurred in most patients. three patients in gc and in gv were in functional class iii in po60m. no difference in the mitral gradient was observed between the groups. a difference in the mean mitral valve areas was observed between the groups during the entire evaluation. no patients died. in regard to the ipo of gc, 3 patients had moderate mitral insufficiency (mi), and 3 had bleeding (1 was reoperated upon). in the ipo of gv, 4 patients had moderate mi, 1 had severe mi, 2 had cardiac tamponade, and 1 patient required surgery due to severe mi. over 60 months, 9 gv patients evolved to moderate or severe mi, while 6 gc patients evolved to moderate or severe mi, and 2 other gc patients required surgery due to double mitral dysfunction. conclusion: the rate of success in open mitral commissurotomy and balloon mitral valvuloplasty was 100%, and the rate of complications was low. during follow-up, a mild elevation in mitral gradient and a drop in mitral valve area were observed in both groups.
Seguran?a e eficácia do acesso radial na realiza??o de procedimentos coronários diagnósticos e terapêuticos em mulheres
Andrade, Pedro Beraldo de;Tebet, Marden André;Andrade, M?nica Vieira Athanazio de;Mattos, Luiz Alberto;Labrunie, André;
Revista Brasileira de Cardiologia Invasiva , 2009, DOI: 10.1590/S2179-83972009000400007
Abstract: background: female gender is an independent predictor of vascular complications after invasive coronary procedures. while reducing the risk of bleeding related to the puncture site, radial access in women might be particularly beneficial in reducing adverse events. method: consecutive female patients undergoing diagnostic and therapeutic coronary procedures using radial access were enrolled in a prospective registry. the success of the technique, the procedure and fluoroscopy times, vascular complications and severe periprocedural cardiovascular adverse events were analyzed. in addition, a comparative analysis between women < 65 and > 65 years old was carried out to determine the applicability of the technique among elderly patients. results: between may 2008 and september 2009, 988 women underwent invasive coronary procedures using the radial access. mean age was 62.5 years, and 32.4% were diabetics. the success rate was 97.1%. there was a low incidence of complications, including asymptomatic occlusion of the radial artery (2.8%), hematomas (2.4%), and severe bleeding (0.2%). except for a longer duration of fluoroscopy while performing angioplasties, women > 65 years showed similar success rates compared to those < 65 years. conclusions: ts, and virtually no severe bleeding related the puncture site.
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