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Search Results: 1 - 10 of 200721 matches for " ítalo Roberto Torres de;Levy "
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Zumbido em pacientes com audiometria normal: caracteriza??o clínica e repercuss?es
Sanchez, Tanit Ganz;Medeiros, ítalo Roberto Torres de;Levy, Cristiane Passos Dias;Ramalho, Jeanne da Rosa Oiticica;Bento, Ricardo Ferreira;
Revista Brasileira de Otorrinolaringologia , 2005, DOI: 10.1590/S0034-72992005000400005
Abstract: patients with tinnitus and normal hearing constitute an important group, given that findings do not suffer influence of the hearing loss. however, this group is rarely studied, so we do not know whether its clinical characteristics and interference in daily life are the same of those of the patients with tinnitus and hearing loss. aim: to compare tinnitus characteristics and interference in daily life among patients with and without hearing loss. study design: historic cohort. material and method: among 744 tinnitus patients seen at a tinnitus clinic, 55 with normal audiometry were retrospectively evaluated. the control group consisted of 198 patients with tinnitus and hearing loss, following the same protocol. we analyzed the patients' data as well as the tinnitus characteristics and interference in daily life. results: the mean age of the studied group (43.1 ± 13.4 years) was significantly lower than that of the control group (49.9 ± 14.5 years). in both groups, tinnitus was predominant in women, bilateral, single tone and constant, but there were no differences between both groups. the interference in concentration and emotional status (25.5% and 36.4%) was significantly lower in the studied group than that of the control group (46% and 61.6%), but it did not happen in regard to interference over sleep and social life. conclusions: patients with tinnitus and normal hearing showed similar characteristics when compared to those with hearing loss. however, the age of the patients and the interference over concentration and emotional status were significantly lower in this group.
A afec??o vestibular infantil: estudo da orienta??o espacial
Novalo, Elaine Shizue;Goffi-Gomez, Maria Valéria Schmidt;Medeiros, ítalo Roberto Torres de;Pedalini, Maria Elisabete Bovino;Santos, Rosa Maria Rodrigues dos;
Revista CEFAC , 2007, DOI: 10.1590/S1516-18462007000400013
Abstract: purpose: to check how is the child's spatial perception in vestibular disorder. methods: prospective study of 18 children, between 3 and 15-year old, under treatment in ambulatório de otorrinolaringologia/hospital das clínicas da faculdade de medicina da universidade de s?o paulo. space perception was assessed through a free activity (free drawing) and two directed activities: the frostig test and an adaptation of the token test. of the 18 evaluated children, 09 composed the study group (diagnosed as having a vestibular disorder) and 09 composed the control group (with no history of vestibular disorder or dizziness). children who showed central nervous system impairments were excluded. results: in relation to the free drawing, 77.78% of the control group and 55.55% in the study group used the whole sheet of paper provided. regarding the proportion of the objects, 100% of the control group showed an adequate proportion in their drawings and it was found in 48.86% of the study group. in the adapted token test, the study group showed a major difficulty. in the frostig test, a small difference between the groups in the perceptual quotient was observed. conclusion: the children with vestibular disorders, while drawing, used the sheet of paper in a less homogeneous way, showing more difficulty to draw human pictures and an inadequate proportion among the drawn objects. in this way, it is important that the vestibular diagnosis should be done the earliest possible in order to anticipate the treatment/rehabilitation. this may prevent the impairment of spatial perception from negatively influencing the learning process.
Early Failure Detection in Power Transformers  [PDF]
Luiz Eduardo Borges da Silva, Erik Leandro Bonaldi, Levy Ely de Lacerda de Oliveira, Germano Lambert-Torres, Giscard F. C. Veloso, Ismael Noronha, Felipe dos Santos Moreira, José Nielze Caminha
Journal of Power and Energy Engineering (JPEE) , 2013, DOI: 10.4236/jpee.2013.15005
Abstract:

This paper presents equipment for early detection of failures in the insulation of power transformers, checking existing partial discharges inside. The equipment involves hardware, control and signal acquisition software, and signal analysis software. This equipment has a set of algorithms that were made with intelligent extraction techniques and interpretation of data. The degradation diagnosis of the equipment insulation is based on digital signal processing algorithms for extraction of features and also in artificial intelligence algorithms that allies a mining involving all the data linked to the equipment throughout its operating life can make an assessment of the operating conditions of the equipment and suggest interventions and provide an estimated time so that they have to be made.

Automatic System for Failure Detection in Hydro-Power Generators  [PDF]
Luis Carlos Ribeiro, Levy Ely de Lacerda de Oliveira, Erik Leandro Bonaldi, Luiz Eduardo Borges da Silva, Camila Paes Salomon, Jonas G. Borges da Silva, Germano Lambert-Torres
Journal of Power and Energy Engineering (JPEE) , 2014, DOI: 10.4236/jpee.2014.24006
Abstract: This paper presents an automatic system for failure detection in hydro-power generators. The main idea of this system is to detect failure using current and voltage signals acquired without any type of internal interference in the generator operation. The detected failures could be mechanical or electrical origins, such as: problems in bearings, unwanted vibrations, partial discharges, misalignment, unbalancing, among others. It is possible because the generator acts as a transducer for mechanical problems, and they appear in current and voltage signals. This automatic system based on electric signature analysis has been installed in Itapebi Power Plant generators since 2012. Some results are presented in this paper.
Multimedia Design and Transmedia Storytelling: Content Production for Microtrainings  [PDF]
Tércia Zavaglia Torres, Marcia Izabel Fugisawa Souza, José Ruy Porto de Carvalho, Silvio Roberto Medeiros Evangelista
Creative Education (CE) , 2015, DOI: 10.4236/ce.2015.623254
Abstract: This article presents an outline of model of the educational microcontent production for microtraining, built from the point of view that learning is a relational, intentional and experiential process, and, as such, it results from social interactions that also occur in labour spaces. The model, entitled “production cycle of pedagogical contents (microcontents)” is conceptually anchored in the theoretical precepts of transmedia storytelling and multimedia design, which in turn, are based in aspects of language, communication and cognition, bringing innovative elements capable of favouring leanings. In order to develop the model proposed and presented in the article, inherent conceptions to transmedia storytelling, multimedia design and education, are bound and articulated. Furthermore, one promotes the dialogue between non-formal education in the context of continuous formation and in the interest of technology transfer actions (TT) and of rural extension and technical assistance, for the formulation of microtraining activities via mobile devices. The essence of the model lies in the proposition of a sequence of steps that culminate in the production and organization of technological contents that incorporate pedagogical paths. Those paths serve as learnings favouring routes. It is accepted that this way of producing and organizing contents increases the chances of the subjects involved in the microtraining reflect upon and investigate their practices, abilities and experiences, thus helping them to resignify their realities and to build new rationalities to address their problems. The model “production cycle of pedagogical contents (microcontents)” was built to potentialize the chances of making microtrainings via mobile devices into massive actions that favour the TT process of Brazilian Agricultural Research Corporation (Embrapa), under a constructivist learning approach.
Thermal Hydraulic Analysis Improvement for the IEA-R1 Research Reactor and Fuel Assembly Design Modification  [PDF]
Pedro Ernesto Umbehaun, Walmir Maximo Torres, José Antonio Batista Souza, Mitsuo Yamaguchi, Antonio Teixeira e Silva, Roberto Navarro de Mesquita, Nikolas Lymberis Scuro, Delvonei Alves de Andrade
World Journal of Nuclear Science and Technology (WJNST) , 2018, DOI: 10.4236/wjnst.2018.82006
Abstract: This paper presents the sequence of activities to improve the thermal hydraulic analysis of the IEA-R1 research reactor to operate in safe conditions after power upgrade from 2 to 5 MW and core size reduction from 30 to 24 fuel assemblies. A realistic analysis needs the knowledge of the actual operation conditions (heat flow, flow rates) beyond the geometric data and the uncertainties associated with manufacturing and measures. A dummy fuel assembly was designed and constructed to measure the actual flow rate through the core fuel assemblies and its pressure drop. First results showed that the flow distribution over the core is nearly uniform. Nevertheless, the values are below than the calculated ones and the core bypass flow rate is greater than those estimated previously. Based on this, several activities were performed to identify and reduce the bypass flow, such as reduction of the flow rate through the sample irradiators, closing some unnecessary secondary holes on the matrix plate, improvement in the primary flow rate system and better fit of the core components on the matrix plate. A sub-aquatic visual system was used as an important tool to detect some bypass flow path. After these modifications, the fuel assemblies flow rate increased about 13%. Additional tests using the dummy fuel assembly were carried out to measure the internal flow distribution among the rectangular channels. The results showed that the flow rate through the outer channels is 10% - 15% lower than the internal ones. The flow rate in the channel formed between two adjacent fuel assemblies is an estimated parameter and it is difficult to measure because this is an open channel. A new thermal hydraulic analysis of the outermost plates of the fuel assemblies takes into account all this information. Then, a fuel design modification was proposed with the reduction of 50% in the uranium quantity in the outermost fuel plates. In order to avoid the oxidation of the outermost plates by high temperature, low flow rate, a reduction of 50% in the uranium density in the same ones was shown to be adequate to solve the problem.
Uso do óxido nítrico inalatório no tratamento da crise hipertensiva pulmonar no pós-operatório de transplante cardíaco
MEJIA, Juan Alberto Cosquillo;SOUZA NETO, Jo?o David de;CARVALHO JR, Waldemiro;PINTO JR., Valdester Cavalcante;MESQUITA, Fernando Ant?nio;BRASIL, Haroldo Barroso;NUNES, Rogean Rodrigues;OLIVEIRA, ítalo Martins de;TORRES, Jo?o Martins de Souza;
Revista Brasileira de Cirurgia Cardiovascular , 2002, DOI: 10.1590/S0102-76382002000300007
Abstract: objective: this study reviews our experience with the use of nitric oxide inhalation (noi) in the treatment of the refractory pulmonary hypertensive crisis (phc) during the immediate post-operative period (ipop) of heart transplantation (ht). method: between oct/97 and feb/02, 31 ht in adults were performed. among them were patients with pulmonary vascular resistance (pvr) greater than 6 uw, or patients with pvr greater than 2,5 uw during the pharmacological test. all patients were weaned from the cpb (m=101±21 minutes) in use of dobutamine, dopamine and milrinone. in the absence of an adequate response to these drugs and with the evidence of phc, noi was given, beginning with 20ppm and increasing, when necessary, up to 40ppm. the recording of the left atrium and pulmonary artery pressures, serial arterial blood gases samples and trans-thoracic echocardiograms (tte) were performed. the donor's brain death (bd) time mean was 16±5,1 hours. results: in five patients (1 female) (mean age = 42 years) noi was employed, due to low cardiac output signs and evidence of phc and right ventricular dysfunction. the mean cpb time was 150,8±34,3 min. the pre-noi mean pap was 87 mmhg (range 75-115), and the mean arterial po2 = 60mmhg (fio2=100%). the tte showed moderate-severe dilation of the right ventricle. noi was given during a mean of 35h (range 6 to 96), being weaned only after hemodynamic stability was achieved. there was only one early death, at the 17th post op. day due to sepsis. all the remaining patients are in nyha class i. conclusions: the prolonged cpb time (> 120 min) and the time of brain death of the donor are factors that increase the risk of phc. the noi is a useful tool in dealing with this complication when there is an inadequate response to the conventional treatment.
Pneumonia intersticial associada à esclerose sistêmica: avalia??o da fun??o pulmonar no período de cinco anos
Lopes, Agnaldo José;Capone, Domenico;Mogami, Roberto;Menezes, Sara Lucia Silveira de;Guimar?es, Fernando Silva;Levy, Roger Abramino;
Jornal Brasileiro de Pneumologia , 2011, DOI: 10.1590/S1806-37132011000200003
Abstract: objective: to evaluate alterations in pulmonary function in patients with systemic sclerosis-associated interstitial pneumonia over a five-year period. methods: this was a longitudinal study involving 35 nonsmoking patients with systemic sclerosis and without a history of lung disease. at the first evaluation, performed at the time of the diagnosis of interstitial pneumonia, the patients were submitted to hrct, spirometry, and measurement of dlco. the patients were subdivided into two groups by the presence or absence of honeycombing on the hrct scans. approximately five years after the first evaluation, the patients were submitted to spirometry and measurement of dlco only. results: of the 35 patients, 34 were women. the mean age was 47.6 years. the mean time between the two evaluations was 60.9 months. honeycombing was detected on the hrct scans in 17 patients. in the sample as a whole, five years after the diagnosis, fvc, fev1 and dlco significantly decreased (81.3 ± 18.2% vs. 72.1 ± 22.2%; 79.9 ± 17.8% vs. 72.5 ± 20.6%; and 74.0 ± 20.5% vs. 60.7 ± 26.8%, respectively; p = 0.0001 for all), and the fev1/fvc ratio significantly increased (98.5 ± 7.2% vs. 101.9 ± 7.8%; p = 0.008). in the same period, fvc, fev1, and dlco values were significantly lower in the patients with honeycombing on the hrct scans than in those without (p = 0.0001). conclusions: in systemic sclerosis-associated interstitial lung disease, the detection of honeycombing on hrct is crucial to predicting accelerated worsening of pulmonary function.
Custo energético de constru o de uma instala o para armazenagem de feno
Campos Alessandro Torres,Saglietti José Roberto Corrêa,Campos Aloísio Torres de,Bueno Osmar de Carvalho
Ciência Rural , 2003,
Abstract: O trabalho teve como objetivo obter uma estimativa da energia empregada na constru o de uma estrutura utilizada para armazenamento de fardos de feno, em um sistema de produ o animal. Para tanto utilizaram-se os coeficientes energéticos levantados pela Funda o Centro Tecnológico de Minas Gerais (CETEC). O valor obtido foi de 587,09 MJ.m-2, o qual foi amplamente diferente daqueles observados na literatura. Da energia total empregada na constru o da instala o os itens fechamentos, estrutura de cobertura, piso e funda es representaram 50,35, 27,71, 18,72 e 3,22%, respectivamente. Considerando o sistema de produ o de feno de alfafa e "coast-cross" como um todo, a instala o contribuiu com somente 0,14 e 0,16% da composi o do custo energético anual destas culturas, respectivamente.
Balan o energético na produ o de feno de alfafa em sistema intensivo de produ o de leite
Campos Alessandro Torres,Saglietti José Roberto Corrêa,Bueno Osmar de Carvalho,Campos Aloísio Torres de
Ciência Rural , 2004,
Abstract: O trabalho teve como objetivo estimar o balan o energético para a produ o do feno de alfafa a partir de dados coletados durante sete anos em um Sistema Intensivo de Produ o de Leite, localizado na regi o de Coronel Pacheco, MG. Para a confec o da matriz energética, foram consideradas as categorias de energia direta e indireta. As entradas de energia ocorridas na implanta o e estabelecimento da cultura foram diluídas nos anos considerados como vida útil. A energia direta, relativa aos insumos, teve maior participa o que a indireta, sendo os percentuais encontrados de 93,05 e 6,95, respectivamente. O principal consumidor de energia indireta foi o trator, que aciona todos os implementos, seguido pelo equipamento de irriga o. A eficiência energética estimada foi de 3,19. A maioria da energia direta utilizada foi aquela derivada de petróleo, na forma de combustível (óleo diesel). A utiliza o de adubo organico, de cama de frango, promoveu uma relativa redu o no consumo de energia advinda de fertilizante derivado do petróleo. Com os resultados obtidos, pode-se concluir que, apesar das diversas fontes de consumo energético, a produ o de feno de alfafa é sustentável e eficiente na convers o energética.
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