oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

4 ( 1 )

2020 ( 1 )

2019 ( 93 )

2018 ( 189 )

Custom range...

Search Results: 1 - 10 of 70610 matches for " Augusto Lima da; "
All listed articles are free for downloading (OA Articles)
Page 1 /70610
Display every page Item
Validation and Comparison of Calibration Techniques for Measurements of Carbon Dioxide in Atmospheric Air Standards  [PDF]
Andreia de Lima Fioravante, Cristiane Rodrigues Augusto, Valnei Smar?aro da Cunha, Luiz Antonio d’Avila
Journal of Environmental Protection (JEP) , 2018, DOI: 10.4236/jep.2018.91004
Abstract: The increase in the concentration of carbon dioxide (CO2) in the atmosphere has led the scientific community to investigate the adverse effects on humanity and nature, including the greenhouse effect, which contributes to global warming and can lead to climate change, besides the risks associated with human health. Due to the importance of metrological issues in the current scenario, the Laboratory of Gas Analysis (Lanag) of the National Institute of Metrology, Quality and Technology (Inmetro) is developing the methodology of preparation of such primary standard gas mixtures through gravimetry. For the preparation of these standards, an analysis verification step is necessary, carried out by means of an analytical technique of comparison, at low levels of concentration, by cavity ringdown (CRDS) and by gas chromatography using a flame ionization detector coupled to a methaniser catalyst (GC-FIDmeth). This work presents the method validation of both methodologies developed to analyze a range of concentration of atmospheric standards of CO2 at a matrix of synthetic clean dry air (SCDA) by CRDS and GC-FIDmeth, of which the analysis results can compromise the measurements on atmospheric air quality. The objective is to compare results of method validation of both analytical methods for low CO2 concentration through the use of primary reference mixtures developed and also by certified reference material. The validation measurement results were analyzed according to the requirements of ISO 5725: 1994 parts 1 and 2, and the calculation of measurement uncertainty followed the methodology described in ISO 6143:2001, with results showing satisfactory consistent between both selected techniques. According to the work presented here, the obtained validation results for CRDS are better than the GC results, such as the relative uncertainty of samples evaluated for CRDS was 0.4% and 2.7% for GC_FID meth.
Metodo de gest?o em sistema de produ??o animal
Machado, Paulo Fernando;Cassoli, Laerte Dagher;Silva, Augusto Lima da;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009001300040
Abstract: the mda (master dairy administration) system was created as a result of management practices developed by and effectively utilized in the industrial sector since the early 1990's. it was designed by applying the five basic management principles to reach success in business. these principles, along with survival principles in the activity, delineated the features of the mda system. it can be characterized as a strategic system which targets the ends from start, that is, the definition, a prior, of targets and deadlines is a primary condition to carry out any task. therefore, there is a need to measure and follow up procedures. if results are not reached, questions must be placed on the training offered to employees or on the methods utilized, but never on the people. moreover, all people interested in the business must have their expectations met - shareholders, customers, employees and the society.
Characterization of Epidemiological ADHD Studies: A Systematic Review  [PDF]
Jo?o Paulo dos Santos Nobre, Ana Flávia Lima Teles da Hora, Abra?o Roberto Fonseca, Simone Souza da Costa Silva, Fernando Augusto Ramos Pontes
Psychology (PSYCH) , 2017, DOI: 10.4236/psych.2017.83025
Abstract: Attention Deficit Hyperactivity Disorder is a multidetermined phenomenon of high incidence affecting children, adolescents and adults worldwide, resulting in impairment in several areas of development such as social relationships, academic performance, professional and romantic relationships. The objective of this study was to review systematically the literature to verify the epidemiological picture of the disorder under three main aspects: 1) what is the ADHA definition; 2) what is the epidemiology of the disorder; and 3) what are the instruments used for diagnostic evaluation. The search was performed in the database Periódicos CAPES, PsicInfo, and MedLine using the keywords “Epidemiology and ADHD” and its correlation in English and Spanish. 331 articles, of which only 21 met the inclusion criteria, were retrieved. The results suggest that there is a consensus on the ADHD definition; however epidemiological data ranged from 0.04% to 24.5%. The studies also varied as to the use of diagnostic instruments, being more used the DSM-IV criteria.
ESTUDO COMPARATIVO ENTRE CUSTOS ASSOCIADOS COM A UTILIZA O DE SISTEMAS MULTIMODAIS DE TRANSPORTES
Simone Tavares Fernandes,Fernando Augusto Silva Marins,Josiane Palma Lima,Renato da Silva Lima
Engevista , 2009,
Abstract: The goal of this paper was to study, by means of a case study, the viability of multimodal transport when compared to the traditional road transport mode in Brazil. The study was conducted in a multinational enterprise of the aluminum-rolling sector, where general cost aspects of road transport, considering trucks with different capacities, and two multimodal transport configurations were compared: cabotage and road transport; and road and rail transport. The results have shown that, for this case, the road transport costs are still smaller when compared to the multimodal options. Although this may sound a counter sense to what is known today on multimodality, it can be explained by some factors, such as higher costs associated with stocks and insurance. Another observed factor in the study was the operational difficulties of multimodal transportation, which corroborates what is found in the literature on the subject.
How Much Do Adjuvant and Nozzles Models Reduce the Spraying Drift? Drift in Agricultural Spraying  [PDF]
Fabiano Griesang, Ricardo Augusto Decaro, Cícero Ant?nio Mariano dos Santos, Eduardo Souza Santos, Nelson Henrique de Lima Roque, Marcelo da Costa Ferreira
American Journal of Plant Sciences (AJPS) , 2017, DOI: 10.4236/ajps.2017.811188
Abstract: The spraying of herbicides in crops has become the main form of weed control. Although it means unexpected effects on non-target plants resulted by spraying drift. Thus, improvements in application techniques, as the best selection of spray nozzles and adjuvant, are essential to avoid environmental contamination and economic losses. On this work, we evaluate how much adjuvant associated with nozzles can reduce the spray drift. The nozzles used at experiment were air induction flat tip, hollow cone and twinjet and the spray liquids, which were composed of herbicide glyphosate and phosphatidylcholine + propionic acid adjuvant. Measurements were made at wind tunnel and droplet sizer, at laser diffraction method. The models of nozzles influence in droplet size characteristics and in occurrence of spray drift. The use of adjuvants reduces the spray drift only combined with the twinjet nozzle, while for the other models the adjuvant did not reduce the global spray drift at significant levels. The adjuvant reduced the spray drift until 39%, while the nozzles model reduced until 74%. Both techniques when combined were able to reduce until 80%. The model of nozzle has the biggest result on drift mitigation and the use of adjuvants can increase the drift mitigation specially with nozzles that produces smallest droplets.
Thymidylate synthase gene (TYMS) polymorphisms in sporadic and hereditary breast cancer
José da Silva Nogueira Junior, Fernando Augusto de Lima Marson, Carmen Sílvia Bertuzzo
BMC Research Notes , 2012, DOI: 10.1186/1756-0500-5-676
Abstract: In this study we included a total of 204 subjects, 70 with BC (33 with SBC, and 37 with HBC) and 134 healthy subjects (controls). The Polymerase Chain Reaction was the method used.Results demonstrated a high frequency of the 3R allele at BC, SBC, and HBC groups. The frequency of genotype 2R/3R was significantly higher in BC group. This work showed association between the 2R/3R variants (OR = 4.14, CI95% = 1.77-9.71) in the development of SBC, and 2R/2R (OR = 0.233, CI95% = 1.63-7.65) and 2R/3R (OR = 3.53, CI95% = 0.06-0.81) for developing HBC. To BC, there was association with the genotype 2R/3R (OR: 3.79, CI95% = 2.03-7.08).Our results show relation to the development of BC in association with the analyzed polymorphisms.Breast cancer (BC) is a genetic disease characterized by an out of control growing breast cells, resulting in cellular proliferation, invasion of surrounding tissues and other organs, with possibility of metastasis [1]. BC is the second leading cancer in the population, it is the most common cancer among women, and the second leading cause of death within them, with approximately 460.000 deaths/year worldwide [1,2].In recent years risk factors for BC have been identified, although the etiology of the disease is still not understood. Risk factors that contribute to the development of BC include age, ethnicity, reproduction, some kind of hormones, lifestyle, bone density, genetic factors [3] and family history [4]. The majority of hereditary breast cancer (HBC) susceptibility can be attributed to germline mutations of to Breast Cancer 1 and Breast Cancer 2 genes (BRCA1 and BRCA2), which are responsible for 30-40% of HBC. Clinically, the basis of HBC is established at an early age, family history, bilateral BC, male BC, ovarian and/or tube cancer, and lower survival when compared to the sporadic form [5].Most of BC are sporadic (SBC), resulting from gene mutations, uncorrected, located in somatic cells, and unrelated to germline mutation. Risk factors
ícones para mapas de riscos: uma proposta construída com os trabalhadores
Facchini, Luiz Augusto;Dall'Agnol, Marinel Mór;Fassa, Anaclaudia Gastal;Lima, Rosangela da Costa;
Cadernos de Saúde Pública , 1997, DOI: 10.1590/S0102-311X1997000300025
Abstract: the methodology known as the workers' model was used to design risk maps in a study performed in the food-processing industry in pelotas, in the state of rio grande do sul in southern brazil. the various types of occupational risks were initially represented by geometric figures, with a size gradient to represent intensity. joint investigation of these icons showed that they had little meaning for the workers. in addition, risks from a same group (physical, chemical, etc.) but with different impact on health were grouped, thus missing the specificities of exposure. as an alternative, and starting from workers' own risk perceptions, a set of risk icons was developed. the study was done in three steps involving sixty workers, who proposed and selected the most suitable symbols, which were subsequently printed on stickers using silk-screen so that the workers could glue them on the risk maps. each risk is represented by one icon, and intensity of exposure is defined by color. this paper presents the icons and the process involved in designing them.
Associa??o entre as características individuais e sócio-econ?micas e os acidentes do trabalho em Pelotas, Rio Grande do Sul, Brasil
Lima, Rosangela da Costa;Victora, César Gomes;Dall'Agnol, Marinel;Facchini, Luiz Augusto;Fassa, Anaclaudia;
Cadernos de Saúde Pública , 1999, DOI: 10.1590/S0102-311X1999000300014
Abstract: a case-control study was conducted to study the association between individual and socioeconomic characteristics and occupational accidents. cases were 264 workers who had suffered a "typical" occupational accident registered at the national institute of social security in the city of pelotas in 1996. workers were interviewed in their homes with a standardized questionnaire. two fatal accidents were excluded, as were those leading to absence from work for less than seven days. for each case, three controls were selected: a colleague from the same workplace, a neighbor, and a population control. these were matched to cases by age (±5 years) and sex and had not suffered a work-related accident in the preceding month. all cases and controls had formal employment contracts and were residents in the urban area. conditional logistic regression was used in the data analyses. schooling and monthly income were the main determinants of occupational accidents. effects of age, skin color, smoking, alcohol dependence (cage questionnaire), and stressful life events disappeared after adjustment for schooling and income.
Variabilidade espacial de atributos físicos do solo em uma microbacia hidrográfica
Vieira, Vinicius Augusto da Silveira;Mello, Carlos Rogério de;Lima, José Maria de;
Ciência e Agrotecnologia , 2007, DOI: 10.1590/S1413-70542007000500031
Abstract: the spatial variability of physical attributes in the soil is of great importance for soil and water management practices. this work aimed at to study the spatial variability of soil physical attributes in a small watershed, in order to evaluate the management of soil and water. the watershed area is considered homogenious, based on erosive agents, such as rainfall, due to its small area (1,23 ha), and it shows variability of soil properties, concerning vegetation, land use, and topography. gis, dgps and total station were used to set up a grid of 20x20 m. soil were sampled from 0 to 20 cm and 20 to 40 cm layers. amount of sandy, silt, clay and water dispersible clay were evaluated. the data were compared in histograms, coefficient of simetry, and geostatistical analyses expressed by semivariograms and kriging maps. all soil attributes demonstrated a spatial dependence, specially at 20-40 cm layer.
Rede social e papéis de gênero de casais ribeirinhos de uma comunidade amaz?nica
Silva, Simone Souza da Costa;Pontes, Fernando Augusto Ramos;Lima, Leandro Cavalcante;Maluschke, Julia Bucher;
Psicologia: Teoria e Pesquisa , 2010, DOI: 10.1590/S0102-37722010000400004
Abstract: this study describes the social network of two couples from a bordering community (araraiana river, municipality ponta de pedras, marajó island/pará). data were collected through a socio demographic inventory, a routine inventory and a field diary and analyzed by a network map. it was observed that the relation of the couples is based on economic and work alliances, company for leisure or religious activity. it has also been found that these relationships are marked by gender patterns which delimit the environments of daily activities, define the status that each one holds in the family and condition the formation of bonds in social networks.
Page 1 /70610
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.