purpose: the purpose of this paper is to identify the main elements of collection and collection management policy of information center & central library of ferdowsi university of mashhad. methodology: this study was an applied research study done through a survey analysis. the population of this study comprised of a representative group of managers, experts, and librarians. the data collectio...

Abstract The use of chemical methods weed control is an effective means control. However, the large amounts herbicides leads to environmental pollution, contaminates food, and adversely affects health people working with herbicides. safest method mechanically remove weeds by pulling rooted out soil or cutting driving under soil. Robots pneumatic, hydraulic, electrical systems cutters. Electrica...

BACKGROUND Visceral leishmaniasis (VL) or kala-azar cases in seasonal labour migrants from highland areas are addressed to travel history to the Metema-Humera lowlands, northwestern Ethiopia. Factors that affect the incidence of VL in extra-domestic habitats were not evaluated. The aim of this study was to evaluate sero-prevalence of Leishmania donovani infection in randomly selected labour mig...

During the course of science education one of the recognizable and desirable changes from a novice to an expert is in their language (knowledge representation). One noticeable change is that of weeding out ambiguous expressions bringing in clarity and rigor. However, this happens not by weeding out the concept names but by choosing more and more accurate linking words (relation names). By focus...