Non Uniformity
Mostrando 25-36 de 81 artigos, teses e dissertações.
-
25. The first impact of the adoption of IFRS in European chemical companies and mining: search descriptive / O impacto da primeira adoção das normas IFRS nas empresas européias químicas e de mineração: pesquisa descritiva
The increasing adoption of International Financial Reporting Standards, IFRS, is consequence of the communication among enterprises, creditors, investors and stakeholders that is following the deep changes that have been taken place in the businesses. The international standards were set by IASB and it has already been identified a worldwide convergence towa
Publicado em: 2008
-
26. Análise sub-ppm de flúor em água pela técnica PIGE / SUB-PPM analysis of fluorine in water by the Pige technique
This work presents a new method for the analysis of fluorine in water, at the tenth of ppm concentration level, based on the PIGE (Particle-Induced Gamma-ray Emission) technique. It is shown that determination of concentrations of this order of magnitude by PIGE requires the use of a preconcentration method. Some attempts of preconcentration of fluorine by a
Publicado em: 2008
-
27. Produção, nutrição e fitossanidade de cultivares de tomateiro, sob manejo orgânico
The indiscriminate use of agrochemical products on tomato crops, besides increasing production costs, has damaged the producers and consumers health and also the environment. The organic management, together with the use of adapted varieties may be a viable alternative to minimize these negative impacts. Thus, this work had as an aim to evaluate the producti
Publicado em: 2008
-
28. Investigation of hyperfine interactions in pure silicon and NTD silicon by means of perturbed angular γ-γ correlation spectroscopy / Investigação de interações hiperfinas em silício puro e silício NTD pela técnica de correlação angular gama-gama perturbada
In the present work, a microscopic investigation of hyperfine interactions in single crystal silicon samples was carried out by means of Perturbed Angular γ-γ Correlation technique (PAC), which is based in hyperfine interactions. In order to achieve these measurements, it was used 111In ->111Cd radioactive probe nuclei, which decay through the we
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/02/2007
-
29. Selección tecnico-economica de emisores
The objective of this research was to study the parameters that affect the technical-economical selection of emitters. In the study compensated and non-compensated emitters were used. The technical aspects considered were: percentage of wetted soil, number of emitters per plant and the uniformity coefficient as well as price and operation pressure for econom
Revista Brasileira de Engenharia Agrícola e Ambiental. Publicado em: 2007-12
-
30. Desempenho de sistema de irrigação por gotejamento utilizado na aplicação de água residuária de suinocultura / Performance of dripping irrigation system using swine wastewater
The objective of this work was to analyze the performance of a drip irrigation system using swine wastewater. The following parameters were evaluated: (a) removal of suspended solids, oils and greases by passing the effluent through sloped static screens; (b) influence of service pressure on clogging of drippers operating with effluent and water; and (c) eff
Publicado em: 2007
-
31. ConservaÃÃo de Sementes de Citrumelo Swingle Colhidas em Diferentes EstÃdios de MaturaÃÃo e Submetidas a Tratamentos Fungicidas / Conservation of citrumelo âSwingleâ seeds collected at different maturation stages and submitted to fungicides
The establishment of orchards in, in its wholeness, performed through rootstocks, which are coming from lots of seeds with an irregular germinative performance, due to the non-uniformity of natural maturation of fruits. Nevertheless, germination, both slow and non-uniform, of the seeds compromises the final stand and increases the time necessary for the esta
Publicado em: 2007
-
32. Seleção de pessegueiro adaptado ao clima subtropical / Peach tree selection adapted the subtropics conditions
The peach is one of fruit species subjected to more research all over the world having a large number of varieties. One of the most important objectives in peach breeding is the low chilling requirement, once it has direct relation with adaptation of the species in areas in mild winters area, characteristic of subtropical regions. Characteristics such as fru
Publicado em: 2007
-
33. Análise numérica e experimental dos efeitos da não-uniformidade da espessura em cascas finas cilíndricas rotativas. / Numerical and experimental analysis of the thickness non-uniformity effects in rotating circular cylindrical shells.
Circular cylindrical shells with small thickness variations along their body, when submitted to rotation, present, in some cases, elastic displacements of their outside surface induced by centrifugal forces leading to final oval like shapes. The main purpose of this study is to establish relationships between thickness variation of the cylindrical shells wit
Publicado em: 2007
-
34. Breastfeeding in Brazil / Aleitamento materno no Brasil
Introduction: Until the age of six months, the feeding of an infant should be restricted to maternal breast milk. Although the proportion of women unable to breast feed their babies for biological reasons is no greater than 10%, the frequency of breastfeeding is usually rather low. In Brazil, since 1981 a combination of measures, specific actions and legal m
Publicado em: 2007
-
35. Optimization of saddle coils for magnetic resonance imaging
In Nuclear Magnetic Resonance (NMR) experiments, besides the apparatus designed to acquire the NMR signal, it is necessary to generate a radio frequency electromagnetic field using a device capable to transduce electromagnetic power into a transverse magnetic field. We must generate this transverse homogeneous magnetic field inside the region of interest wit
Brazilian Journal of Physics. Publicado em: 2006-03
-
36. Estudo de amplificadores parametricos para sistemas de comunicações opticas de altas taxas de transmissão / Study of parametric amplifiers for high bit rate optical communication systems
This thesis presents a theoretical and experimental study on fiber optics parametric amplifiers. For the double-pumped case, we show the performance of the amplifier in terms of spectral bandwidth and gain uniformity, both fundamental properties for WDM applications. By using short dispersion shifted fibers and highly non-linear fibers, we made parametric am
Publicado em: 2006