Unit Root
Mostrando 25-36 de 149 artigos, teses e dissertações.
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25. Herança e correlação entre caracteres de raiz e eficiência de uso do nitrogênio em milho / Inheritance and correlation between root traits and nitrogen use efficiency in maize
The efficiency of nitrogen fertilization in maize did not exceed 50%. Among the existing proposals to increase the efficiency of nitrogen use in maize stands the higher N uptake from the increase of the root system, especially in environments with low availability of N. The objectives of this work were to study the influence of nitrogen in the genetic variab
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/02/2010
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26. Componentes de la variabilidad espacial en el manejo por sitio específico en banano
The objective of this work was to evaluate the spatial variability of banana production, in function of physical and chemical variables of soil and of farm physiographic characteristics, in order to select those with the greatest potential for use in site-specific management program. One hundred thirty productive units of banana clone Williams (Cavendish AAA
Pesquisa Agropecuária Brasileira. Publicado em: 2010-08
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27. Endodontic and prosthetic treatment of teeth with periapical lesions in a 16-year-old-girl
This paper reports the nonsurgical endodontic therapy using calcium hydroxide intracanal dressing and prosthetic treatment of 9 teeth with periapical lesions in a 16-year-old female patient. The periodontal treatment plan included oral hygiene instructions, mechanical debridement and gingivectomy in the maxillary incisors to improve gingival contouring. Root
Journal of Applied Oral Science. Publicado em: 2010-04
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28. Hysteresis in brazilian manufactured exports: a panel cointegration analysis / Hysteresis nas exportações manufaturadas brasileiras: uma análise de cointegração com dados em painel
In spite of the recent fall of the growth rate of Brazilian exports, the response of external sales to the appreciation of the exchange rate has been slower than what was predicted by economic theory. These evidences suggest that deviations from a long-run relationship between exchange rate and exports may take longer to be corrected, motivating the investig
Publicado em: 2010
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29. Uma abordagem da hipótese da neutralidade da moeda usando dados do Brasil pós-Real / An approach to the hypothesis of neutrality of money using data from Brazil after the Real Plan
The hypothesis of neutrality of money is the theoretical framework of the Quantity Theory of Money (QTM), which is based from the Fishers equation of exchange, assuming that the income-velocity of money is constant, the real output is exogenously determined by nonmonetary variables, such as technology, capital stock and labor supply. But the real output is t
Publicado em: 2010
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30. Avaliação do modelo de valor presente entre preços e dividendos para o mercado acionário brasileiro: evidência ao nível da firma a partir de técnicas de painel aplicadas a processos não estacionários e potencialmente cointegrados
O Modelo de Valor Presente (MVP) - no qual os preços correntes dos títulos dependem do valor presente de dividendos futuros descontados, em que a taxa de desconto é equivalente à taxa requerida de retorno - é um dos modelos da Teoria Financeira. Esta relação tem sido alvo da literatura empírica pelo rápido aumento dos preços no mercado de ações n
Publicado em: 2010
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31. Apreçamento racional de mercadorias utilizando modelo de valor presente para o boi gordo no período de 2001 a 2008
Campbell and Schiller (1987) proposed, within the scope of econometric analysis and cointegration, a powerful tool that enabled the present value model tests to also test market rationality and efficiency. The opportunity offered by the present value model of a substantial and settled fundamental value theory together with a powerful tool kit of empiricaleco
Publicado em: 2010
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32. / Taylor Principle And Inflation Stability In Emerging Market Countriesw
The goal of this paper is to evaluate the validity of the Taylor principle for inflation control in 12 developing countries that use inflation targeting regimes: Brazil, Chile, Colombia, Hungary, Israel, Mexico, Peru, Philippines, Poland, South Africa, Thailand and Turkey. The test is based on a state-space model to determine when each country has followed t
Publicado em: 26/08/2009
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33. Radiopacity evaluation of root canal sealers containing calcium hydroxide and MTA
The purpose of this study was to evaluate the radiopacity of root canal sealers containing calcium hydroxide and MTA (Acroseal, Sealer 26, Sealapex, Endo CPM Sealer, Epiphany and Intrafill). Five disc-shaped specimens (10 x 1 mm) were fabricated from each material, according to the ISO 6876/2001 standard. After setting of the materials, radiographs were take
Brazilian Oral Research. Publicado em: 2009-06
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34. Comparison of the time required for removal of intraradicular cast posts using two Brazilian ultrasound devices
The aim of this in vitro study was to compare the time required for removal of intraradicular cast posts cemented with zinc phosphate (ZF) or glass ionomer cement (GIC), using two Brazilian ultrasound devices (BUD). Seventy two human inferior premolars with single root canals were sectioned transversally at the cementoenamel junction. In each specimen, the r
Brazilian Oral Research. Publicado em: 2009-03
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35. The solvency of the municipal government of Ceará in the period 2002-2008 / A solvência das administrações públicas municipais cearenses no período 2002-2008
Considering that the intertemporal budget constraint of the government is fulfilled, this work examines the long-run solvency of the public accounts of the municipalities of Ceara following Hamilton and Flavin (1986), Levin et al. (2002) and Im, Pesaran, and Shin (2003). If an administration does not use a Ponzi game it is considered solvent if the budget de
Publicado em: 2009
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36. Sustentabilidade fiscal dos estados brasileiros no período de 1985 a 2005 / Fiscal sustainability of the Brazilian states in the period 1985 to 2005
Esta pesquisa se propõe a investigar a sustentabilidade fiscal dos Estados brasileiros, durante o período de 1985 a 2005, por meio de um exercício empírico. Para isso, utiliza-se da razão entre a Despesa Corrente e Receita Corrente e a Despesa Corrente e o PIB e de testes de raiz unitária para dados em painel. Os resultados dos testes de Lin, Levin &Ch
Publicado em: 2009