List of Bid Proposal Holders, May 17, 2011

List of Bid Proposal Holders

List of Bid Proposal Holders, June 21, 2011

List of Bid Proposal Holders

List of Bid Proposal Holders, July 19, 2011

List of Bid Proposal Holders

Design of homogeneous territorial units : a methodological proposal

One of the main questions to solve when analysing geographically added information consists of the design of territorial units adjusted to the objectives of the study. This is related with the reduction of the effects of the Modificable Areal Unit Problem (MAUP). In this paper an optimisation model to solve regionalisation problems is proposed. This model seeks to reduce disadvantages found in previous works about automated regionalisation tools

List of Bid Proposal Holders, August 16, 2011

List of Bid Proposal Holders

List of Bid Proposal Holders, September 20, 2011

List of Bid Proposal Holders

List of Bid Proposal Holders, October 5, 2011

List of Bid Proposal Holders

List of Bid Proposal Holders, October 18, 2011

List of Bid Proposal Holders

List of Bid Proposal Holders, November 9, 2011

List of Bid Proposal Holders

List of Bid Proposal Holders, November 15, 2011

List of Bid Proposal Holders

List of Bid Proposal Holders, December 20, 2011

List of Bid Proposal Holders

List of Bid Proposal Holders, January 18, 2012

List of Bid Proposal Holders

Trying to define Free Will : a cognitive and fonctional model proposal

The debate about Free Will has been in the human mind for centuries, but has become even more intense with the recent scientific findings adding new lights on the problem. This interdisciplinary explosion of interest for the topic has brought many insightful knowledge, but also a great deal of epistemological problems. We think that those epistemological problems are deeply related to the very definition of Free Will and how this definition interacts with the interpretations of experimental results. We will thus outline a few of these problems and then propose a definition of Free Will which takes into account those epistemological pitfalls.

Proposal for an index to classify irrigation water quality: a case study in northeastern Brazil

One way of classifying water quality is by means of indices, in which a series of parameters analyzed are joined a single value, facilitating the interpretation of extensive lists of variables or indicators, underlying the classification of water quality. The objective of this study was to develop a statistically based index to classify water according to the Irrigation Water Quality Index (IWQI), to evaluate the ionic composition of water for use in irrigation and classify it by its source. For this purpose, the database generated during the Technology Generation and Adaptation (GAT) program was used, in which, as of 1988, water samples were collected monthly from water sources in the states of Paraíba, Rio Grande do Norte and Ceará. To evaluate water quality, the electrical conductivity (EC) of irrigation water was taken as a reference, with values corresponding to 0.7 dS m-1. The chemical variables used in this study were: pH, EC, Ca, Mg, Na, K, Cl, HCO3, CO3, and SO4. The data of all characteristics evaluated were standardized and data normality was confirmed by Lilliefors test. Then the irrigation water quality index was determined by an equation that relates the standardized value of the variable with the number of characteristics evaluated. Thus, the IWQI was classified based on indices, considering normal distribution. Finally, these indices were subjected to regression analysis. The method proposed for the IWQI allowed a satisfactory classification of the irrigation water quality, being able to estimate it as a function of EC for the three water sources. Variation in the ionic composition was observed among the three sources and within a single source. Although the water quality differed, it was good in most cases, with the classification IWQI II.

List of Bid Proposal Holders, February 21, 2012

List of Bid Proposal Holders