background: organic acids refer to a family of compounds that are intermediates in a variety of metabolic pathways. many organic acids are present in urine from clinically normal individuals. elevated levels of urine organic acids cause to the organic acidurias, disorders in which some metabolic pathways in organic acid metabolism are blocked. the present work identified major and minor urinary...

Mosquitoes can cause a lot of suffering to humans by transferring diseases. Malaria is a mosquito-borne disease caused by the parasite Plasmodium. It is an acute public health issue in many countries and can be fatal. Considering the similarity in the transmission of mosquito-borne diseases, a generic spatial-temporal model for transmission of multiple mosquito-borne diseases was formulated. Th...

Chemical and analytical monitoring of the quality of environment is based on the accounting of the trace amount of substances. Considering the multicomponent composition of the environment and running processes of transformation of substances in it, in determination of the danger of the exposure to the chemical pollution of environment on population health there is necessary evaluation based on...

There is renewed optimism regarding the use of natural experimental studies to generate evidence as to the effectiveness of population health interventions. Natural experimental studies capitalise on environmental and policy events that alter exposure to certain social, economic or environmental factors that influence health. Natural experimental studies can be useful for examining the impact o...

Achieving guideline-based targets in patients with diabetes is crucial for improving clinical outcomes and preventing long-term complications. Using electronic heath records (EHRs) to identify high-risk patients for further intervention by screening large populations is limited because many EHRs store clinical information as dictated and transcribed free text notes that are not amenable to stat...

Innovation systems can be defined in a variety of ways: they can be national, regional, sectoral, or technological. They all involve the creation, diffusion, and use of knowledge. Systems consist of components, relationships among these, and their characteristics or attributes. The focus of this paper is on the analytical and methodological issues arising from various system concepts. There are...

Population distribution has been long studied. There are no clear answers as to what the major influential factors that drive population density are. Using ArcGIS 9.1, this study focuses on global population distribution and it’s relationship to selected biological and environmental factors. Using geoprocessing techniques such as reclassify, weighted overlay and modelbuilder, models where creat...

This article summarizes the recent literature on population momentum, usually defined as the subsequent population growth or decline after replacement conditions have been achieved. We review total momentum, its constituent parts (nonstable and stable momentum), trends over time, and how momentum is affected by immigration and emigration. Numerical examples are provided. The unifying concept is...

In this study, we focus on the stability analysis of equilibrium points of population dynamics with delay when the Allee effect occurs at low population density is considered. Mainly, mathematical results and numerical simulations illustrate the stabilizing effect of the Allee effects on population dynamics with delay.