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Search Results: 1 - 10 of 345123 matches for " André L. F.;Vieira "
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The effect of different supermarket checkout workstations on trunk kinematics of checkout operators
Rodacki, André L. F.;Vieira, Jo?o E.;
Brazilian Journal of Physical Therapy , 2010, DOI: 10.1590/S1413-35552010000100007
Abstract: objectives: this study analyzed the effect of a standard and a modified checkout workstation during a simulated task on trunk postures of a supermarket checkout operator. methods: eight participants performed a task involving grasping, scanning and depositing products, while 3d images of the trunk were collected. results: a number of kinematic changes were observed in trunk posture. a greater anterior flexion (3.0±1.2o) and lateral bending during grasping (7.1±1.4o) were found in the standard checkout workstation when compared to the modified model (p<0.05). other variables did not show significant differences (p>0.05). discussion: the modified checkout workstation provided less lateral bending of the trunk to grasp products (8.1o ± 2.8; p<0.05), which was considered an advantage with respect to the standard model. changes in the sagittal and transversal planes were not observed (p>0.05), irrespective of the checkout workstations (p>0.05). the modified checkout workstation successfully reduced risk of injury in some aspects, particularly the problems associated with lateral bending of the trunk. other studies are required to test whether such potential benefits are obtained on a daily basis. conclusions: supermarket checkout operators may be at high risk of occupational injury due to different workstation demands. modifications to checkout workstation design are an attractive possibility to reduce postural stress and fatigue in checkout operators. longitudinal studies are required to test whether changes observed in the present study are sustained in the long term.
Karyotype studies in Brazilian species of Lobelia L., subgenus Tupa (Campanulaceae)
Brazilian Journal of Botany , 2001, DOI: 10.1590/S0100-84042001000300002
Abstract: karyotypes of 14 populations including eight species of the genus lobelia were studied using root tip mitotic metaphases. all populations were tetraploid with 2n = 28 chromosomes. the chromosome base number x = 7 was confirmed for the genus. karyotype analysis showed that chromosome size varied from 1.05 μm to 2.02 μm with predominance of m and sm chromosome types. the karyotypes were similar among themselves with small intra- and interspecific variations on the size of haploid sets, symmetry indexes and centromere position of some chromosome pairs. these results showed that karyotypes of brazilian lobelias of the subgenus tupa were probably due to polyploidy associated with chromosomal rearrangements probably in small chromatin segments.
Produ??o e renda bruta de cebolinha e de salsa em cultivo solteiro e consorciado
Heredia Z., Néstor A.;Vieira, Maria do Carmo;Weismann, Martin;Louren??o, André L.F.;
Horticultura Brasileira , 2003, DOI: 10.1590/S0102-05362003000300032
Abstract: 'todo ano' bunching onion and 'lisa' parsley were studied in mono and inter-cropping system arranged in a randomized complete block experimental design with three treatments and eight replications. bunching onion was propagated by cuttings and parsley by seeds. both crops were harvested 90 days after the beginning of propagation. plant height, copse diameter and dried and fresh mass yield were evaluated. also diameter and number of shoots of bunching onion plants and height of parsley plants were evaluated. averages of bunching onion (33.50 cm) and parsley (27.11 cm) height, of bunching onion shoot diameters (0.42 cm) and of cut height of parsley (6.41 cm) plants were not affected by treatments. the greatest average of copse diameter was obtained in plants under mono-cropping system, with differences of 6.13 cm for bunching onion and 2.85 cm for parsley in relation to those under inter-cropping system. bunching onion plants inter-cropped with parsley had a significant increase of 0.54 millions of shoots ha-1 in relation to those under mono-cropping system. average yield of bunching onion and parsley plants under mono-cropping system presented an increase of 1.32 and 2.42 t ha-1 of fresh mass and of 0.20 and 0.24 t ha-1 of dried mass, respectively, in relation to those in inter-cropping system. land equivalent ratios for bunching onion and parsley inter-cropping system were 1.41 and 1.50 considering dried and fresh mass yield, respectively. total gross income showed that bunching onion inter-cropped was better with increases of 25.06% (r$ 7,830.00) and 74.93% (r$ 16.740.00) per hectare when related to gross income of bunching onion or parsley in mono-cropping system, respectively.
Produ o e renda bruta de cebolinha e de salsa em cultivo solteiro e consorciado
Heredia Z. Néstor A.,Vieira Maria do Carmo,Weismann Martin,Louren??o André L.F.
Horticultura Brasileira , 2003,
Abstract: Foram estudadas a cebolinha 'Todo Ano' e a salsa 'Lisa', em cultivos solteiro e consorciado, arranjadas no delineamento experimental de blocos casualizados, com três tratamentos e oito repeti es. A propaga o da cebolinha foi por mudas e a da salsa por sementes. Na colheita, feita aos 90 dias após o início da propaga o, nas duas espécies, foram avaliadas a altura das plantas, diametro das touceiras e produ es de massas fresca e seca das plantas. Também foram avaliados diametro e número de perfilhos das plantas de cebolinha e a altura do corte das plantas de salsa. As médias de altura das plantas da cebolinha (33,50 cm) e da salsa (27,11 cm), do diametro dos perfilhos da cebolinha (0,42 cm) e da altura do corte nas plantas da salsa (6,41 cm) n o apresentaram efeito dos tratamentos. As maiores médias do diametro das touceiras foram obtidas nas plantas sob cultivo solteiro, com diferen as de 6,13 cm na cebolinha e de 2,85 cm na salsa, em rela o àquelas sob consórcio. As plantas da cebolinha consorciadas com a salsa tiveram aumento significativo de 0,54 milh es de perfilhos ha-1 em rela o àquelas sob cultivo solteiro. As produ es médias das plantas da cebolinha e da salsa sob cultivo solteiro tiveram, respectivamente, mais 1,32 e 2,42 t ha-1 de massa fresca e 0,20 e 0,24 t ha-1 de massa seca em rela o àquelas sob consórcio. As raz es de área equivalente para o consórcio cebolinha e salsa foram de 1,41 e 1,50 ao considerar as produtividades de massas frescas e secas, respectivamente. A renda bruta total mostrou que o consórcio cebolinha-salsa foi melhor, com aumentos por hectare de 25,06% (R$ 7.830,00) e de 74,93% (R$ 16.740,00), quando relacionado com a renda da cebolinha ou da salsa em cultivo solteiro, respectivamente.
A obesidade estaria relacionada ao aumento do volume das adrenais?
Matos, Amélio F.G.;Vieira, Andréa R.;Coutinho, Walmir;Madeira, Denise;Carraro, Lúcia M.;Rodrigues, Rosa;Bastos, Gláucia;Cabral, M?nica;Pantale?o, André;Oliveira, Jucinéia;Meirelles, Ricardo M.R.;
Arquivos Brasileiros de Endocrinologia & Metabologia , 2000, DOI: 10.1590/S0004-27302000000100005
Abstract: many studies suggest that there is a hyperactivity of the hypothalamic-pituitary-adrenal (hpa) axis related to obesity with accumulation of fat in the abdominal region. some studies demonstrate that after the injection of corticotrophin-releasing hormone (crh) or corticotrophin (acth) and according to the results of stress tests, the levels of cortisol are increased when compared to patients with peripheral fat deposition. moreover, some studies show that in depressed patients, where the hyperactivity of hpa is known and represents an important endocrinological change, the adrenal volume is increased. to investigate if the amount of visceral fat is related in some way to adrenal gland volume, a group of 52 women with different corpulence indexes was studied. anthropometries measures, such as weight, body mass index (bmi), waist circumference and waist-to-hip ratio (whr) were checked. the areas of visceral and subcutaneous fat, as well as adrenal gland volumes, were checked by abdominal computed tomography. there was an extremely relevant correlation between the measurements of central fat deposition (whr and waist circumference) and the amount of visceral fat (vf), although no correlation was found between the whr and the subcutaneous fat. the added adrenals volumes showed a positive correlation to the whr (r = 0.272; p = 0.02) and also to the vf (r = 0.228; p = 0.05). no correlation with the subcutaneous fat, bmi, and weight were found. the added adrenals volumes were increased when vf 3 120 cm2 as compared with patients with vf < 120 cm2 (p = 0.05). thus, this study suggests that the amount of vf seem to be related to the hpa hyperactivity, anatomically expressed in this study by the adrenal volume, the target gland of this axis.
Monitoriza??o contínua de glicose: análise crítica baseada em experiência ao longo de um ano
Oliveira, Cláudia H.M.C. de;Berger, Karina;Souza, Sílvia Coral de A.L. e;Marui, Suemi;Khawali, Cristina;Hauache, Omar M.;Vieira, José Gilberto H.;Maciel, Rui M.B.;Reis, André F.;
Arquivos Brasileiros de Endocrinologia & Metabologia , 2005, DOI: 10.1590/S0004-27302005000600020
Abstract: conventional assessment of glycemic control in diabetes mellitus (dm) includes blood glucose attention to glycemia and glycated hemoglobin levels. recently, we introduced the continuous glucose-monitoring test (cgm) (medtronic minimed - cgms? system goldtm). here we describe our experience with this methodology over the year 2004. a total of 141 cgm tests were performed over this period of time. overall, 88% (n= 124) patients were diabetics (dm), 99 of them were insulin users. we found a strong correlation between glucose values obtained by cgm and capillary glucose measures (r= 0.926; p< 0.005). in diabetic patients, nocturnal hypoglycemia (< 50mg/dl) was identified in ~35% (n= 44), hyperglycemic patterns (> 220mg/dl) at specific times of day in ~44% and sustained hyperglycemia throughout the whole monitoring period in thirteen cases (10%). twelve tests were performed to investigate the occurrence of hypoglycemia in non-diabetic subjects. two tests came out very suggestive of "dumping", and in one case the cgms supported the hypothesis of insulinoma. partial monitoring interruptions have occurred in 15% of all tests. we concluded that cgms is a useful methodology to investigate glycemic fluctuations, and it is also an important tool to adjust therapy in diabetic patients.
Experimental Study of Two Impinging Jets Aligned With a Crossflow  [PDF]
Jorge M. M. Barata, Fernando M. S. P. Neves, Diana F. C. Vieira, André R. R. Silva
Journal of Modern Physics (JMP) , 2014, DOI: 10.4236/jmp.2014.516175
Abstract: Laser Doppler measurements provide information on the flowfield created by twin impinging jets aligned with a low velocity crossflow. The experiments were carried out for a Reynolds number based on the jet exit conditions of Rej = 4.3 × 104, an impingement height of 20.1 jet diameters and for a velocity ratio between the jet exit and the crossflow VR = Vj/Uo of 22.5, and an inter-jet spacing of S = 6D. The results show a large penetration of the first (upstream) jet that is deflected by the crossflow and impinges on the ground, giving rise to a ground vortex due to the collision of the radial wall and the crossflow that wraps around the impinging point like a scarf. The second jet (located downstream) is not so affected by the crossflow in terms of deflection, but due to the downstream wall jet that flows radially from the impinging point of the first jet it does not reach the ground. The results indicate a new flow pattern not yet reported so far, that is most relevant for a VSTOL aircraft operating in ground vicinity with front wind or small forward movement may result in enhanced under pressures in the aft part of the aircraft causing a suction down force and a change of the pitching moment towards the ground.
Effects of short-term isokinetic training with reciprocal knee extensors agonist and antagonist muscle actions: A controlled and randomized trial
Rafael Cunha,Rodrigo L. Carregaro,André Martorelli,Amilton Vieira
Brazilian Journal of Physical Therapy , 2013,
Abstract: BACKGROUND: Previous studies have shown that preloading an antagonist muscle may increase the acute agonist neuromuscular performance. In addition, studies have suggested that very short-term resistance exercise (RE) programs may also be useful to increase strength and muscular performance. OBJECTIVES: To evaluate the effects of three days of RE using a reciprocal action method on the muscular performance of healthy men and to compare these effects with those of a traditional RE group. METHOD: Thirty-three men (21.1 ± 2.3 years) were randomly assigned to one of three groups: 1) reciprocal (REC; knee flexion immediately followed by a knee extension exercise); 2) traditional (TRA; non-preload; a concentric knee extension exercise); and 3) control (CON; no exercise). The REC and TRA subjects performed four sets of 10 repetitions at 60o/s with one minute of rest. The pre- and post-RE tests included two sets of four maximal concentric repetitions at 60o/s and 180o/s. A 3x2 ANOVA with Tukey post-hoc was used to analyze the differences in peak torque (PT), rating of acceleration development (RAD) and time to peak torque (TIMEtorque). RESULTS: A significant PT increase was found for REC and TRA (p<0.05) at 60o/s and for REC at 180o/s (p<0.05). There was a decrease in the RAD for REC and TRA (p<0.05), and TIMEtorque showed a significant decrease for REC. The inter-group analysis revealed that REC is more effective than TRA for PT gains at both velocities (p<0.05). CONCLUSION: It is recommended that REC offers benefits for the clinical practice of professionals involved in neuromuscular rehabilitation. CONTEXTUALIZA O: Estudos demonstraram que a pré-ativa o de músculos antagonistas pode aumentar o desempenho neuromuscular agonista. Além disso, estudos sugerem que programas de exercício resistido (ER) de curta dura o podem ser úteis para aumentar a for a muscular e o desempenho. OBJETIVOS: Avaliar os efeitos de três sess es de ER por meio do método de a es recíprocas no desempenho muscular de homens sadios e comparar com um grupo de ER tradicional. MéTODO: Trinta e três homens (21,1 ± 2,3 anos) foram randomicamente alocados em três grupos: Recíproco (REC: uma repeti o de flex o do joelho imediatamente seguida por uma de extens o do joelho); Tradicional (TRA: exercício concêntrico de extens o do joelho) e Controle (CON: n o realizaram exercício). O REC e o TRA realizaram quatro séries de dez repeti es a 60o.s-1 com um minuto entre séries. As avalia es pré e pós-ER foram caracterizadas por duas séries de quatro repeti es máximas a 60o.s-1 e 180o.s-1. Utilizo
Sustained Reduction of the Dengue Vector Population Resulting from an Integrated Control Strategy Applied in Two Brazilian Cities
Lêda N. Regis, Ridelane Veiga Acioli, José Constantino Silveira, Maria Alice Varjal Melo-Santos, Wayner Vieira Souza, Candida M. Nogueira. Ribeiro, Juliana C. Serafim. da Silva, Antonio Miguel Vieira Monteiro, Cláudia M. F. Oliveira, Rosangela M. R. Barbosa, Cynthia Braga, Marco Aurélio Benedetti Rodrigues, Marilú Gomes N. M. Silva, Paulo Justiniano Ribeiro Jr., Wagner Hugo Bonat, Liliam César de Castro Medeiros, Marilia Sa Carvalho, André Freire Furtado
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0067682
Abstract: Aedes aegypti has developed evolution-driven adaptations for surviving in the domestic human habitat. Several trap models have been designed considering these strategies and tested for monitoring this efficient vector of Dengue. Here, we report a real-scale evaluation of a system for monitoring and controlling mosquito populations based on egg sampling coupled with geographic information systems technology. The SMCP-Aedes, a system based on open technology and open data standards, was set up from March/2008 to October/2011 as a pilot trial in two sites of Pernambuco -Brazil: Ipojuca (10,000 residents) and Santa Cruz (83,000), in a joint effort of health authorities and staff, and a network of scientists providing scientific support. A widespread infestation by Aedes was found in both sites in 2008–2009, with 96.8%–100% trap positivity. Egg densities were markedly higher in SCC than in Ipojuca. A 90% decrease in egg density was recorded in SCC after two years of sustained control pressure imposed by suppression of >7,500,000 eggs and >3,200 adults, plus larval control by adding fishes to cisterns. In Ipojuca, 1.1 million mosquito eggs were suppressed and a 77% reduction in egg density was achieved. This study aimed at assessing the applicability of a system using GIS and spatial statistic analysis tools for quantitative assessment of mosquito populations. It also provided useful information on the requirements for reducing well-established mosquito populations. Results from two cities led us to conclude that the success in markedly reducing an Aedes population required the appropriate choice of control measures for sustained mass elimination guided by a user-friendly mosquito surveillance system. The system was able to support interventional decisions and to assess the program’s success. Additionally, it created a stimulating environment for health staff and residents, which had a positive impact on their commitment to the dengue control program.
The New Brazilian Power Quality Standard and a Low Cost Device Meter  [PDF]
Guilherme P. Colnago, Jose L. F. Vieira, Gilberto C. D. Sousa, Jose R. Macedo Jr.
Energy and Power Engineering (EPE) , 2012, DOI: 10.4236/epe.2012.43020
Abstract: This paper presents an overview about the new Brazilian Power Quality Standard and provides a low cost device PQ meter, developed and implemented to assist the national campaign to assess the Brazilian power quality indices, unknown until now. This work contributes with the search of a low cost devices PQ meter for a cost sensitive market, and introduces the new Brazilian Power Quality Standard to the international community.
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