A great reliability, causes a decrease of failures in the rotating machines

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Satisfaction of UUM E-Mail Service Among Academician

The absence of the necessary infrastructure forms a barrier to institutions providing ICT enabled information sharing. This study focuses on UUM academics satisfaction of UUM email service. The questionnaire was adopted from Doll & Torkzadah (1988) and Seddon & Kiew (1996). The data collection has been done through direct interview and email. The aim of this study is to access the degree of satisfaction email service among academics in UUM. Specifically, the objective of this study are develop a theoretical framework of UUM email service satisfaction among academics in UUM and evaluate the academics' satisfaction towards the UUM email service.The results have been analyzed using SPSS. Overall, UUM email service satisfies UUM academician where the score is more than the average

A demand-driven approach for a multi-agent system in Supply Chain Management

This paper presents the architecture of a multi-agent decision support system for Supply Chain Management (SCM) which has been designed to compete in the TAC SCM game. The behaviour of the system is demand-driven and the agents plan, predict, and react dynamically to changes in the market. The main strength of the system lies in the ability of the Demand agent to predict customer winning bid prices - the highest prices the agent can offer customers and still obtain their orders. This paper investigates the effect of the ability to predict customer order prices on the overall performance of the system. Four strategies are proposed and compared for predicting such prices. The experimental results reveal which strategies are better and show that there is a correlation between the accuracy of the models' predictions and the overall system performance: the more accurate the prediction of customer order prices, the higher the profit. © 2010 Springer-Verlag Berlin Heidelberg

Evolução e dinâmica da produção de maçã no Brasil no período de 1975 a 2003.

bitstream/item/35610/1/Evolucao-e-dinamica.pd

First-principles study of the electrooptic effect in ferroelectric oxides

We present a method to compute the electrooptic tensor from first principles, explicitly taking into account the electronic, ionic and piezoelectric contributions. It allows us to study the non-linear optic behavior of three ferroelectric ABO_3 compounds : LiNbO_3, BaTiO_3 and PbTiO_3. Our calculations reveal the dominant contribution of the soft mode to the electrooptic coefficients in LiNbO_3 and BaTiO_3 and identify the coupling between the electric field and the polar atomic displacements along the B-O chains as the origin of the large electrooptic response in these compounds.Comment: accepted for publication in Phys. Rev. Let

Evolução e dinâmica da produção de uva no Brasil no período de 1975 a 2003.

bitstream/CNPUV/8969/1/doc062.pd

Evolução e dinâmica da produção de maçã no Brasil no período de 1975 a 2003.

bitstream/CNPUV/9579/1/doc066.pd

Concentração espacial e dinâmica da produção de arroz no Brasil, de 1975 a 2005.

Introdução. Metodologia geral. Dados. Distribuições. Ordenamentos. Ordenamento das regiões e das unidades da federação. Ordenamento das microrregiões. Assimetria de distribuição de frequência. Medida de concentração. Distâncias com áreas geográficas. Centro de gravidade. Mapas estatísticos. Estatísticas básicas. Nível regional. Nível de unidade da federação. Nível de microrregião: ordenamento por volume. Procedimento básico. Concentração da quantidade produzida. Microrregiões no grupo 25 da quantidade produzida. Dinâmica da quantidade produzida. Contribuição percentual das partes A, B e C da quantidade produzida. Mapas de dinâmica da quantidade produzida. Nível de microrregião: ordenamento por densidade. Procedimento básico. Concentração da quantidade produzida. Mapa da quantidade produzida, com base na densidade de produção. Microrregiões com as mais altas densidades de produção de arroz. Dinâmica com base na densidade de produção. Nível de microrregião: ordenamento por produtividade. Procedimento básico. Concentração da quantidade produzida. Mapa da quantidade produzida, com base na produtividade. Microrregiões com as mais altas produtividades. Dinâmica com base na produtividade. Dinâmica de centros de gravidade. Centros de gravidade. Distâncias percorridas pelos centros de gravidade. Considerações finais. Referências.bitstream/item/80031/1/seriedocumentos-283.pd

The evolution of shrinkage strain of pet-mortar composite eco-materials

Concretes and mortars are subjected to several kinds of shrinkage strains which represent the volumic variations resulting from the cement hydration and are governed by various physical and chemical aspects. The use of polyethylene terephthalate PET plastic wastes which are available in quantity and within low cost in our country yields a very important economic and environmental impact in the construction industry. Thus, we are interested to investigate the effect of PET volumetric additive amounts for cement substituting and for the behavior of the total, drying and autogenous shrinkage. Comparison study of obtained experimental results with codale prediction models were performed according to Eurocode 2  (EC2) in order to analyze the evolution of shrinkage strain with PET-mortar  composite ages and for several rates of PET waste additions. According to obtained results, PET additions acts to reduce shrinkage strains of PET-mortar composites which promote the use of these modified mortar Eco-materials in the field of construction industry.Keywords: Composite Eco-materials; Cement substitution; Shrinkage strain; PET waste; EC2

DYNAMIC DISORDER AT INTERMEDIATE TEMPERATURE AND ITS EFFECT ON THE MAGNETIC PROPERTIES OF THE ORGANIC SUPERCONDUCTOR κ-(BEDTTTF)2Cu[N(CN)2]Br

The k-(BEDT-TTF)X superconducting salts, [where BEDT-TTF is bis(ethylenedithio)-tetrathiafulvalene, abbreviated as ET, and X is a monovalent anion like Cu[N(CN) ]Br 2 , and for either Cu[N(CN) ]Cl 2 or ( )2 Cu NCN and so on], exhibit interestinmagnetic and superconducting phase transitions [1]. They are quasi-two-dimensional and the interplane coupling is very weak. The basic structural unit is a dimer consisting of two BEDTTTF molecules stacked on top of one another. This layered structure leads to highly anisotropic electronic properties. These organic superconductors have similar characteristic superconducting properties including the intrinsic Josephson Effect and the mixed-state properties. This similarity suggests the existence of the vortex phase transition in the organic layered superconductors as observed in HTSC. Because the temperature scale is much lower in organic materials, the thermal fluctuation is expected to be small compared to HTSC. Thus, the comparison between the high-Tc and organic superconductors can give important clues as to the nature of vortex phase transitions. Besides these anomalies around 50 K, unusual time dependencies in magnetic and transport properties have been reported for both deuterated and hydrogenated k-Br near 80 K. For - H - Br 8 k , the superconducting properties have been found to depend on the thermal history, in particular on how fast the sample had been cooled through 80 K. As mentioned above, the ground state of - D - Br 8 k is strongly sample-dependent: both superconducting as well as non-superconducting crystals are found. Furthermore, superconducting as well as insulating (possibly antiferromagnetic) phases in separated volume parts of the same sample have been reported. Their relative volume fraction was found to depend on the cooling rate Vc employed at around 80 K[2-3-4]: in fast cooled samples, a strong decrease of the diamagnetic signal has been observed, which has been interpreted as indicating a suppression of the superconducting in favour of the magnetic phase