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Search Results: 1 - 10 of 351463 matches for " António J. Silva "
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Heat Source Estimation with the Conjugate Gradient Method in Inverse Linear Diffusive Problems
Su, Jian;Silva Neto, Antnio J.;
Journal of the Brazilian Society of Mechanical Sciences , 2001, DOI: 10.1590/S0100-73862001000300005
Abstract: in this work, we present the solution of a class of linear inverse heat conduction problems for the estimation of unknown heat source terms, with no prior information of the functional forms of timewise and spatial dependence of the source strength, using the conjugate gradient method with an adjoint problem. after describing the mathematical formulation of a general direct problem and the procedure for the solution of the inverse problem, we show applications to three transient heat transfer problems: a one-dimensional cylindrical problem; a two-dimensional cylindrical problem; and a one-dimensional problem with two plates.
Qualidade da vincula??o e modelo interno de funcionamento do Self, em crian?as vítimas de queimaduras
Silva,Iara G.; Santos,António J.;
Revista de Enfermagem Referência , 2011,
Abstract: the aims of the present study are to analyse the relationship between quality of attachment to mother and internal models of the self in a group of child burn victims. the sample was made up of fifty children, aged between 62 and 95 months. data were collected using the child?s drawing of the family (kaplan and main, 1986) to measure the child?s representation of the quality of attachment and the puppet interview (cassidy, 1988) to evaluate the internal model of the self. results showed the relationship between attachment relationship established between mother and child and the organization of the child?s internal model of the self. thus, we may conclude that the quality of attachment is related to the way children adapt to an altered body image after suffering a burn accident.
Qualidade da vincula o e modelo interno de funcionamento do Self, em crian as vítimas de queimaduras Calidad de la vinculación y modelo interno de funcionamiento del Self, en ni os víctimas de quemaduras Quality of attachment and internal working model of Self in a group of child burn victims
Iara G. Silva,António J. Santos
Revista de Enfermagem Referência , 2011,
Abstract: O presente estudo tem como objectivo analisar a rela o entre o modelo interno de funcionamento do Self e a qualidade da vincula o num grupo de crian as vítimas de queimaduras. A amostra foi constituída por cinquenta crian as, com idades compreendidas entre os 62 e os 95 meses. Utilizamos o Desenho Infantil da Família (Kaplan e Main, 1986) para avaliar a representa o que a crian a tem da qualidade da vincula o e Puppet Interview (Cassidy, 1988) para avaliar o modelo interno de funcionamento do Self. Os resultados demonstraram a existência de uma rela o entre a qualidade da vincula o estabelecida entre a m e e a crian a e a organiza o do modelo interno de funcionamento do Self positivo. Neste sentido, concluímos que a qualidade da vincula o pode influenciar a forma como a crian a se adapta a uma imagem corporal alterada, depois de ter sofrido um acidente por queimadura. El presente estudio tiene por objetivo analizar la relación entre el modelo interno de funcionamiento del Self y la calidad del apego en un grupo de ni os víctimas de quemaduras. La muestra fue constituida por cincuenta ni os, con edades comprendidas entre 62 y 95 meses. Utilizamos el Dibujo Infantil de la Familia (Kaplan y Main, 1986, traducido por Veríssimo y Santos, 2001), para evaluar la representación que el ni o tiene de la calidad del apego y Puppet Interview (Cassidy, 1988), para evaluar el modelo interno del funcionamiento del Self. Los resultados revelan la existencia de una relación entre la calidad del apego establecido entre madre e hijo y la organización del modelo interno del funcionamiento del Self positivo. En este sentido, podemos concluir que la calidad del apego puede influir en el modo como el ni o se adapta a una imagen corporal modificada, tras haber sufrido un accidente por quemadura. The aims of the present study are to analyse the relationship between quality of attachment to mother and internal models of the self in a group of child burn victims. The sample was made up of fifty children, aged between 62 and 95 months. Data were collected using the Child’s Drawing of the Family (Kaplan and Main, 1986) to measure the child’s representation of the quality of attachment and the Puppet Interview (Cassidy, 1988) to evaluate the internal model of the Self. Results showed the relationship between attachment relationship established between mother and child and the organization of the child’s internal model of the Self. Thus, we may conclude that the quality of attachment is related to the way children adapt to an altered body image after suffering a burn accident
Heat Source Estimation with the Conjugate Gradient Method in Inverse Linear Diffusive Problems
Su Jian,Silva Neto Antnio J.
Journal of the Brazilian Society of Mechanical Sciences , 2001,
Abstract: In this work, we present the solution of a class of linear inverse heat conduction problems for the estimation of unknown heat source terms, with no prior information of the functional forms of timewise and spatial dependence of the source strength, using the conjugate gradient method with an adjoint problem. After describing the mathematical formulation of a general direct problem and the procedure for the solution of the inverse problem, we show applications to three transient heat transfer problems: a one-dimensional cylindrical problem; a two-dimensional cylindrical problem; and a one-dimensional problem with two plates.
PARASITISMO POR CESTOIDES DA ORDEM Trypanorhyncha NA MUSCULATURA DE Plagioscion squamosissimus – PESCADA BRANCA (PERCIFORME: SCIAENIDAE), COMERCIALIZADOS EM MACAPá, AP
Antnio Carlos Souza Silva Júnior
Ciência Animal Brasileira , 2010,
Abstract: The objective of this research was to determine the speciesof cestodes from the Trypanorhyncha order that parasites the Plagioscion squamosissimus Heckel, 1840 (Brazilian common name: Pescada Branca), which are commercialized at fairs from Macapá, Amapá State, Brazil. From March 2008 to December 2008, 80 specimens of P. squamosissimus were submitted to necropsy, from which 63 fish (78.8%) were parasitized by larvae plerocercoids from Trypanorhyncha order. A multiple parasitism of four species, Pterobothrium heteracanthum, Callitetrarhynchus gracilis, Poecilancistrium caryophyllum, Pterobothrium crassicolle was recorded in the musculature of the fish. Larvae plerocercoids from Trypanorhyncha in the musculature do not present any risk of infection for humans, but affect the aesthetics of the fish, for its repulsive aspect, and may be rejected by consumers and often have the commercialization prevented by the sanitary fiscalization. This was the first record of parasites of musculature in fish proceeding from the State of Amapá.KEYWORDS: Amapá, fish, Trypanorhyncha.
Obesity: Nutrition and Genetics—A Short Narrative Review  [PDF]
José M. Tallon, Janine Narciso, Ana Barros, Ana Pereira, Aldo M. Costa, António J. Silva
Health (Health) , 2018, DOI: 10.4236/health.2018.1012134
Abstract: Obesity has become a major global health challenge and it is a risk factor for the development of several comorbid conditions. Additionally, obesity has considerable economic consequences. Obesity is a multifactorial condition that arises from independent influences of genetic and social-environmental factors on food intake and physical activity. It has been difficult to establish clear associations between weight status and the intake of single foods or food groups. In most people, the predisposition to obesity has a polygenic basis, which means that obesity will develop if an individual has several polygenic variants that increase body weight. The FTO gene was the first GWAS-identified obesity-susceptibility gene and since then other polygenic variants that are associated with BMI and dietary intake have also been identified. However, this is still an active area of research as more polygenetic variants await discovery.
Antifungal Activity and Toxicity of the 3,4,5-Trihydroxybenzoic and 3,4,5-Tris(Acetyloxy)Benzoic Acids  [PDF]
Jéssica Pinto, Diego Silva, Jo?o Honorato, Antnio Menezes, Eugénia Pinto, Plínio Naves
Advances in Microbiology (AiM) , 2015, DOI: 10.4236/aim.2015.57053
Abstract: Invasive fungal infections have been gaining notoriety due to several factors, mainly their increasing incidence in immunocompromised patients. The aim of the present study was to evaluate the antifungal activity and toxicity of the 3,4,5-trihydroxybenzoic acid (3,4,5-THB) and of its derivative, the 3,4,5-tris(acetyloxy)benzoic acid (3,4,5-TAB). The 3,4,5-THB was purchased and its derivative was obtained by purifying and characterizing performed using semisynthesis reactions (esterification), recrystallization, column chromatography and infrared analytical techniques and nuclear magnetic resonance. Minimum inhibitory concentration (MIC) and minimum lethal concentration (MLC) were determined in order to evaluate the antifungal activity of the compounds against four clinical isolates and four standard strains of Candida sp. and five clinical isolates of dermatophytes, following the Clinical and Laboratory Standards Institute protocols. The toxicity of the compounds was evaluated by determining the lethal dosis (LD50) using lethality assay of Artemia salina. The most sensitive yeasts to the 3,4,5-THB were C. albicans ATCC 10231 and C. krusei ATCC 6258, both presenting a MIC of 128 μg·mL-1. For Trichophyton sp. and Epidermophyton floccosum, the MIC was 32 μg·mL-1. The 3,4,5-TAB showed a lower inhibitory activity against Candida
Effects of aquatic exercise on depression and anxiety in ischemic stroke subjects  [PDF]
Felipe J. Aidar, Nuno D. Garrido, António J. Silva, Victor M. Reis, Daniel A. Marinho, Ricardo Jacó de Oliveira
Health (Health) , 2013, DOI: 10.4236/health.2013.52030
Abstract:

Background: Stroke ranks third and is the leading cause of permanent disability in western countries. Furthermore there are no treatments for the psychosocial effects of this pathology. Purpose: Analyse the effect of an aquatic exercise program in depression and trace and state anxiety in subjects who suffered an ischemic stroke. Methods: Two groups were analyzed: experimental group (EG) n = 15, 50.3 ± 9.1 years; control group (CG) n = 13, 52.5 ± 7.7 years. EG underwent a 12-week aquatic exercise program. Both groups were evaluated in pre and post- treatment using Beck Depression Inventory (BDI) and Trace State Anxiety Inventory (IDATE). Wilcoxon signed-rank and Mann-Whitney tests were used to compare moments and groups, respec- tively. Results: The BDI scores of aquatic activities were: pre-treatment, 17.4 ± 7.7 and 16.9 ± 8.6 for the EG and CG, respectively; post-treat- ment, 13.2 + 7.1 and 16.4 + 7.9 for the EG and CG, respectively. The IDATE scores for anxiety trace in strength training were: pre-treatment, 43.2 + 12.5 and 42.9 + 12.2 for the EG and CG, respec- tively; post-treatment, 39.7 + 7.1 and 42.6 + 12.1 for the EG and CG, respectively. The IDATE scores for anxiety state in strength training were: pre-treatment, 46.9 + 7.6 and 47.4 + 8.1 for the EG and CG, respectively; post-treatment, 44.4 + 7.9 and 47.5 + 8.0 for the EG and CG, respectively. Significant differences were found in pre and post-treatment values in the EG and between groups in the depression and trace and state anxiety levels in post-treatment (p < 0.05). Conclusions: Aquatic physical activity contributes to an improvement of the levels of depression and anxiety in people who suffered a stroke.

Survivorship, larval development and pupal weight of Anticarsia gemmatalis (Hübner) (Lepidoptera: Noctuidae) feeding on potential leguminous host plants
Panizzi, Antnio R.;Oliveira, Lenita J.;Silva, Jovenil J.;
Neotropical Entomology , 2004, DOI: 10.1590/S1519-566X2004000500004
Abstract: in brazil, the velvetbean caterpillar anticarsia gemmatalis hübner is multivoltine. several overlapping generations occur with larvae feeding on alternate host plants in areas of warmer temperatures. in this study, the survivorship and development of a. gemmatalis larvae were evaluated on 17 species of cultivated and non-cultivated legumes in laboratory conditions. larval survivorship on summer legumes varied from 91% on soybean to 5% on showy crotalaria and on velvetbean. on winter legumes, survivorship of a. gemmatalis larvae varied from 90% on white lupin to 25% on common vetch. all larvae fed on yellow lupin died during early development. on non-cultivated summer legumes, 70% of the larvae on indigofera suffruticosa millsp., and 55% on i. truxillensis h.b.k. and i. endecaphylla jacq. reached the pupal stage. based on survivorship, larval development and pupal weight, the most suitable legumes for a. gemmatalis were soybean, pigeon pea, and white lupin.
INCLUSION OF EXERCISE INTENSITIES ABOVE THE LACTATE THRESHOLD IN VO2/RUNNING SPEED REGRESSION DOES NOT IMPROVE THE PRECISION OF ACCUMULATED OXYGEN DEFICIT ESTIMATION IN ENDURANCE-TRAINED RUNNERS
Victor M. Reis,António J. Silva,António Ascens?o,José A. Duarte
Journal of Sports Science and Medicine , 2005,
Abstract: The present study intended to verify if the inclusion of intensities above lactate threshold (LT) in the VO2/running speed regression (RSR) affects the estimation error of accumulated oxygen deficit (AOD) during a treadmill running performed by endurance-trained subjects. Fourteen male endurance-trained runners performed a sub maximal treadmill running test followed by an exhaustive supra maximal test 48h later. The total energy demand (TED) and the AOD during the supra maximal test were calculated from the RSR established on first testing. For those purposes two regressions were used: a complete regression (CR) including all available sub maximal VO2 measurements and a sub threshold regression (STR) including solely the VO2 values measured during exercise intensities below LT. TED mean values obtained with CR and STR were not significantly different under the two conditions of analysis (177.71 ± 5.99 and 174.03 ± 6.53 ml·kg-1, respectively). Also the mean values of AOD obtained with CR and STR did not differ under the two conditions (49.75 ± 8.38 and 45.8 9 ± 9.79 ml·kg-1, respectively). Moreover, the precision of those estimations was also similar under the two procedures. The mean error for TED estimation was 3.27 ± 1.58 and 3.41 ± 1.85 ml·kg-1 (for CR and STR, respectively) and the mean error for AOD estimation was 5.03 ± 0.32 and 5.14 ± 0.35 ml·kg-1 (for CR and STR, respectively). The results indicated that the inclusion of exercise intensities above LT in the RSR does not improve the precision of the AOD estimation in endurance-trained runners. However, the use of STR may induce an underestimation of AOD comparatively to the use of CR
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