during the last years, the concept of input congestion and technical ineff-ciency in data envelopment analysis (dea), have been investigated by manyresearchers. the motivation of this paper is to present models which obtain thedecreased output value due to input congestion and technical ineciency. more-over, we extend the models to estimate input congestion, technical ineciencyand output red...

This paper introduces, for an experimental design with design matrix X; the optimal design criterion based on the expectation of the square root of the quadratic form u(XX)u. This provides a geometric and statistical measure of the size of a con ̄dence ellipsoid, namely, the expected radius of an ellipsoid. Properties of the criterion are derived and examples are given to demonstrate the procedu...

In the 25 years since the fi rst reported cases of acquired immunodefi ciency syndrome (AIDS), more than 70 million people have been infected with the human immunodefi ciency virus (HIV). HIV is a retrovirus that is spread from mother to child, through blood contamination and through sex. Antiretroviral drugs administered to HIV-infected pregnant women and the newborn child, together with exclu...

A conceptual framework for crop production effi ciency was derived using thermodynamic effi ciency concept, in order to generate a tool for performance evaluation of agricultural systems and to quantify the interference of determining factors on this performance. In Thermodynamics, effi ciency is the ratio between the output and input of energy. To establish this relationship in agricultural sy...

Objective . To study the state of enteral parietal microbiota and to assess conjugacy its changes with motor-evacuation disorder gastrointestinal tract (gastrointestinal tract) in chronic duodenal insufficiency. Materials methods The included 40 patients insufficiency (CDN). Of these, 21 (52.5%) were women, 19 (47.5%) men, average age was 37.1± 13.8 years. CDN diagnosed using anamnestic physica...

Underground hydrogen storage has been recognized as a key technology for storing enormous amounts of hydrogen, thus aiding in the industrial-scale application economy. However, underground is only poorly understood, which leads to high project risk. This research examined effect caprock availability and injection rate on recovery factor leakage address some fundamental questions related storage...