Physical Sciences and Engineering

The study examined the role of corporate governance principles in raising the financial performance efficiency for insurance companies in Sudan. The study has the following questions: Does the applying of corporate governance principles affect the profitability of insurance companies? What is the relationship between applying the principles of governance and liquidity? The study reached the following results: The rights of the equity principle help increase the net profit of insurance companies.

A method has been provided for the disinfection of water polluted by bacteria comprising administering zero-valent iron to the water in the presence of oxygen. This administration lead to the hydroxyl free radicals generation assuring the disinfection of contaminated water. A method has been used to proof the generation of free radicals.

In this paper, we applied linear transformations in the graph theory. Firstly, we constructed vector spaces of a finite number of elements over the field F={0,1}.Then we used them to construct linear transformations (in fact linear operators), defined on each of the vector spaces of the degrees of the vertices;〖(D〗_V,+_V,._V); the vector space of the vertices;(V,⨁▒〖,⨀)〗 ; and the vector space of the number of the paths between the vertex a and the other vertices;〖(P〗_a,+_P,._P);.The last linear transformations is defined from V into D_V.

Les changements climatiques influent sur la production agricole. La présente recherche se propose d’analyser les effets des changements climatiques sur la production de riz dans les départements du Zou et des Collines. Pour ce faire, des données sont collectées au Météo-Bénin, au MAEP/DSA et de la CT-SAGSA couvrant la période de 1987-2016. Ensuite, il a été procédé à une analyse descriptive de ces données, à une modélisation économétrique suivant l’approche ARDL au moyen des logiciels Excel et E views.

Inadequate supply of vitamin A is among the most pressing challenges facing developing countries including Nigeria. This study was undertaken to develop an acceptable chin-chin from orange fleshed sweet potato (OFSP) and red bambara groundnut (RBG) flours. Orange fleshed sweet potato contain beta carotene which is a precursor of vitamin A. Red bambara groundnut have potential to supply high protein to food products. The OFSP and RBG flours were blended in ratios 60:40, 50:50, 40:60, and 30:70, respectively.

Teacher thought and action are variables that have been considered as explanatory of the teaching - learning in the classroom. At work the theories of action of educators about the personal and social development in preschool children are described and exposed the relationship between their theories and theories in use is analyzed. He was approached from a qualitative perspective, using the technique of case study. We worked with three educators two kindergartens in Mexico City.

The outbreak of coronavirus (COVID 19) has led to the death of over 400,000 all over globe and over 7 million of confirmed cases within five months and exact drug for immunization and cure has not been obtained but preventive measure can be taken. One of such preventive measures involved washing of hand regularly, especially in the public like schools, shopping centers, religion centers, offices, bankse.t.c need to have automatic hand washing dispenser. In this work a low cost automatic hand washing dispenser was developed.

The history of India spans over more than 2000 years. It has different states each with its own distinctive social and cultural character. The western regions of India have a hot and semi- arid climate with irregular rainfall. There was always a need to collect water of monsoon rains to utilize it during the dry months of the year. That is how the step-wells came into existence and India is a home to hundreds of them.

Introducción: Los cuidados de higiene venosa son aquellos que son proporcionados para mejorar la salud de la circulación sanguínea en las personas que padecen alguna enfermedad venosa crónica o como medio de prevención de estas. Objetivo: El objetivo del presente estudio es la determinar la prevalencia en la indicación y correcta aplicación de los cuidados de los cuidados perioperatorios de Higiene Venosa que se llevan a cabo y cual es de método de mayor empleo en el Centro Médico Naval (CEMENAV) en el periodo de septiembre de 2018- mayo de 2019.

The general belief that a complex tax policy puts enormous weight on Small and Medium Scale Enterprises (SMEs) and affects their growth level appeared to be a recent debate in Ekiti state and this constituted the motivation for this study. On this premise, this study was undertaken to examine tax policy, SMEs compliance perception and growth relationship in Ekiti state.