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Search Results: 1 - 10 of 76478 matches for " José Inácio;Camargo "
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Aposentadoria, press?o salarial e desemprego por nível de qualifica??o
Camargo, José Márcio;Reis, Maurício Cortez;
Revista Brasileira de Economia , 2008, DOI: 10.1590/S0034-71402008000300004
Abstract: during the nineties the unemployment rate and the household retirement income per capita rose sharply in brazil. it happened in a more intense way for the unskilled workers than for the other groups. according to the argument of this paper, the increase in household retirement income could have affected workers reservation wage, augmenting their wage pressure. in this way, wage pressure changes could have implied higher unemployment and long-term unemployment rates. the empirical evidence, using pnad data from 1981 to 1999, shows that household retirement income has a positive effect on the unemployment rate and on the long-term unemployment rate for unskilled workers.
Desemprego: o custo da desinforma??o
Camargo, José Márcio;Reis, Maurício Cortez;
Revista Brasileira de Economia , 2005, DOI: 10.1590/S0034-71402005000300003
Abstract: the relationship between skill and unemployment rate is an inverted u-shape and youth unemployment rate is 2.5 higher than adult unemployment rate in brazil. this paper argues that these facts are due to asymmetric information in the labor market. semi-skilled workers have higher asymmetric information because they are a very heterogeneous group and their educational level offers little information to the employer about the worker's productivity ability. the asymmetric information is higher for young workers because some information about the productivity is revealed as the worker accumulates experience in the labor market. assuming that asymmetric information leads to homogeneous wages, the evidences are consistent with our hypothesis. the employers have less information about the young and semi-skilled productivities and asymmetric information is positively correlated with unemployment rate.
Análise de estabilidade de geradores de indu o utilizados em turbinas eólicas de velocidade fixa
Maurício Barbosa de Camargo Salles,José Roberto Cardoso
Exacta , 2008,
Abstract: In this work, it is analyzed the dynamic behaviour of two methodologies to improve large-disturbance stability performance of fixed-speed wind turbines based on induction generators directly connected to distribution networks. The first is the reactive power compensation, where two technologies are investigated: SVC (Static Var Compensator) and DSTATCOM (Distribution Static Synchronous Compensator). The second one is the blade pitch angle control. The dynamic performance of these generators during short-circuits in the network due to different control signal of the electronic and mechanical devices are investigated. The electronic devices have showed better performances when controlled by terminal voltage signals, while the mechanical devices with rotor velocity or the combined signal.
Sopros da Amaz?nia: sobre as músicas das sociedades tupi-guarani
Bastos, Rafael José de Menezes;Piedade, Acácio Tadeu de Camargo;
Mana , 1999, DOI: 10.1590/S0104-93131999000200005
Abstract: based on an in-depth critical review of jean-michel beaudet?s recent book, souffles d?amazonie, which the authors believe to have all the merits for becoming a classic of amazonian musical studies, this article provides a survey of some of the fundamental questions of south american lowland ethnomusicology, taking as its focus tupi-guarani societies. of a congenitally comparative nature, these questions are placed in dialogue with some of the important problematics in the regional ethnology, with the aim of advancing the field as a whole.
Avalia??o de genótipos de trigo no vale do Paranapanema (SP) de 1985 a 1991
Felício, Jo?o Carlos;Camargo, Carlos Eduardo de Oliveira;Pedro Júnior, Mário José;
Bragantia , 1993, DOI: 10.1590/S0006-87051993000100005
Abstract: twenty one wheat cultivars were evaluated in trials carried out at paranapanema valley region, southwest of the state of sao paulo, brazil, taking into account the grain yield and the reactions to the causal agents of leaf spot, leaf rust and mildew. the amount of rainfall was divided in periods of ten days in each month (march to october). the rain excess occurred during the second period of ten days on june, 1987, increased the occurrence of the evaluated diseases. the cultivars ocepar 14, iac 227, iapar 17, iac 60, iac 28, iac 18, iac 17 and iac 21 showed higher grain yields than the 'bh 1146' used as control, and the cultivars ocepar 7 and alondra presented the lowest yields. the leaf spot, caused by cochliobolus sativus exhibited generalized occurrence in the evaluated trials increasing in intensity as the amount of rainfall increased. the occurrence of leaf rust and mildew was variable and presented low frequency during the period.
Teor de água do solo na extra??o de fósforo por papel de filtro impregnado com óxido de ferro
Miola, Gerson Luiz;Tedesco, Marino José;Gianello, Clesio;Camargo, Flávio Anastácio de Oliveira;
Ciência Rural , 2000, DOI: 10.1590/S0103-84782000000400028
Abstract: in order to evaluate sou phosphorus extraction by iron oxide impregnated filter papers (pi), a laboratory study was conducted with six soils from lhe rio grande do sul state (brazil) previousiy incubated with dijferent phosphorus leveis. phosphorus extraction was done at 75% of water retained atfield capacity and in saturated conditions. in saturated conditions, lhe soil phosphorus extracted was m lhe average nearly 20 times greater than that extracted at 75% of field capacity moisture levei. phosphorus extraction increased linearly with time during lhe 24 hours test period.
Sopros da Amaz nia: sobre as músicas das sociedades tupi-guarani
Bastos Rafael José de Menezes,Piedade Acácio Tadeu de Camargo
Mana , 1999,
Abstract: Com base em uma aprofundada resenha crítica do recente livro de Jean-Michel Beaudet, Souffles d′Amazonie, que os autores consideram ter todos os requisitos para se tornar um clássico dos estudos musicais amaz nicos, procede-se ao levantamento de algumas das quest es fundamentais da etnomusicologia das terras baixas da América do Sul, com foco nas sociedades tupi-guarani. De natureza congenitamente comparativa, essas quest es s o colocadas a dialogar com algumas das problemáticas importantes da etnologia regional, na dire o do avan o do campo como um todo.
Empirical models to predict soil nitrogen mineralization
Camargo Flávio Anastácio de Oliveira,Gianello Clesio,Tedesco Marino José,Riboldi Jo?o
Ciência Rural , 2002,
Abstract: Empirical models are mathematical equations that can be fitted to experimental results. The use of these models aims to evaluate or predict observed phenomena or experimental data with the objective of helping the development of adequate soil management practices. Based on these considerations, eight mathematical models described in the literature are compared in the present work, using as experimental data the mineral N accumulated during 32 weeks of incubation in Southern Brazilian soils. To obtain mineralization values experimentally, an incubation-washing procedure with 0.01mol L-1 CaCl2 was used. Mineral N was determined at the beginning of the incubation and in the 2nd, 4th, 8th, 16th and 32nd weeks. Among the models, the best fit was obtained with the simple exponential model to describe the mineralization of organic N in the soils. The double exponential models showed quite good fit, but may be superparametrized. In addition, the hypothesis on which these models are based, i.e., the presence of two forms of organic N susceptible to mineralization, cannot be sustained in this study.
Avalia??o de genótipos de trigo para a regi?o do Vale do Paranapanema ano quadriênio 1981-84
Felício, Jo?o Carlos;Camargo, Carlos Eduardo de Oliveira;Freitas, José Guilherme de;Ferreira Filho, Antonio Wilson Penteado;Barros, Benedito de Camargo;Camargo, Marcelo Bento Paes de;
Bragantia , 1986, DOI: 10.1590/S0006-87051986000200006
Abstract: wheat cultivars were evaluated on experiments in soils with and without aluminum toxicity in the paranapanema valley, in the state of sao paulo, brazil, during the period 1981-1984. the characteristics studied were related to reactions to the agent of stem and leaf rusts, reaction to helminthosporium sp. and the effect of climatic conditions. there was no difference in grain yield among the cultivars presenting sensitivity to aluminum toxicity, however the tolerant cultivars pat 72247, cep 7780 and bh 1146 showed good performance in relation to grain yield. the cultivars anahuac, sparrow"s", cep 74138, cep 7780, r 30464-77, cnt 8, el pato and inia 66 presented resistance to stem rust. the cultivar iapar 1 (mitacoré) showed resistance to leaf rust. alondra 46 classified as resistant to leaf rust until 1982, had the resistance broke down in 1983. the occurrence of leaf diseases caused by helminthosporium sp. was variable during the period of study increasing its frequency when the plants were submitted to a high humidity period after the pathogen inoculation. the climatic conditions were very different to compare data from different years.
Melhoramento do trigo: XII. Comportamento de novas linhagens e cultivares no Estado de S?o Paulo
Camargo, Carlos Eduardo de Oliveira;Felício, Jo?o Carlos;Freitas, José Guilherme de;Barros, Benedito de Camargo;Castro, Jairo Lopes de;Sabino, José Carlos;
Bragantia , 1985, DOI: 10.1590/S0006-87051985000200014
Abstract: twenty one inbred lines obtained at the instituto agron?mico from the wheat breeding program plus the cultivars bh-1146, iac-18, iac-17, and alondra-s-46 were evaluated in field experiments carried out at campinas experiment center and cap?o bonito experiment station, during the years of 1982 and 1983, at tietê experiment station, in 1982 and at floresta negra farm, maracaí, in 1983. grain yield, plant height, number of days from emergence to flowering and from emergente to maturation, percentage of layed plants, head length, number of grain per spike and per spikelet, number of spikelets, weight of 100 grains, and resistance to stem and leaf rusts were evaluated under field conditions and tests of resistance to stem and leal rusts and to aluminum were also made, respectively, in greenhouse and in laboratory. considering the trials planted under sprinkler irrigation, at campinas, the lines iac-60 and iac-67 showed good performance regarding to grain yield. in cap?o bonito, represented by acid soils, the lnes iac-66, iac-60 and iac-69 showed high grain yield. the lines iac-64, iac-68, iac-71 and iac-60 presented good productivity at tietê experiment station and iac-67, iac-63 and iac-64 were more adapted to high soil fertility showing the best grain yields at maracaí. the lines iac-52, iac-53, iac-54, iac-55, iac-56, iac-57, iac-58, iac-60, iac-64, iac-65, iac-67, iac-71 and the cultivar alondra-s-46 exhibited semi-dwarf type when compared to the tall cultivar bh-1146. in relation to stem rust, the lines iac-62 and iac-65 and the cultivar alondra-s-46 showed very good resistance presenting at seedling stage, resistance to seven rates under both greenhouse and field conditions. the line iac-64 was resistant to four and iac-52 and iac-55 to three races of leaf rust in the seedling stage under greenhouse condition. the lines iac-51, iac-56, iac-61, iac-62, iac-63 and iac-67 presented good resistance to this rust in natural infection out in the fíeld. the lines iac-51, i
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