BACKGROUND A high level of comorbidity at dialysis initiation is associated with an increased risk of death. However, contemporary assessments of the validity and prognostic value of comorbidity indices are lacking. OBJECTIVES To assess the validity of two comorbidity indices and to determine if a high degree of comorbidity is associated with mortality among dialysis patients. DESIGN Cohort...

Wind erosion is a major environmental issue affecting land resources and socio-economic settings in Iran. This paper outlines a study undertaken to provide a new tool to manage wind erosion from physical and economic perspectives. The southern part of the Varamin Plain in south of Tehran is used as a case study. The focus of this study is on exploring the economic and physical impacts of 16 veg...

NIST Handbook 146, HAZARD I—Fire Hazard Assessment Method [1], represents the culmination of a long-term program aimed at placing the prediction of fire outcomes on an objective and scientific basis. In the 1970s, NIST supported Harvard University to develop numerical models that could predict the temperature in a room containing a fire. These early models were difficult to use and interpret; r...

Drought is one of the major threats to water and food security in many regions around world. The present study focuses on evaluation agricultural drought risk from an integrated perspective, that is, emphasizing combined role hazard, exposure, vulnerability drought. For this purpose, we used Mexican state Zacatecas as a case study. This most vulnerable adverse effects country. proposed method i...

Abstract The aim of the study is to assess strength world stock exchanges reaction SARS-CoV-2 coronavirus pandemic at turn 2019–2020. We analyze risk and intensity decline in values basic indices by means selected methods survival analysis. spreading within a few months covered all continents had significant impact on socio-economic situation countries. studied time 20% drop market indices. Thi...

This paper presents the estimation of main reliability indices two milling teeth types. The comparative analysis referred to manufactured by conventional cutting processes, made 41Cr4 (type I), and high-productivity welding loading namely, laser cladding II). To analyze distributions lifetime data specific types, correlation coefficient value was considered. Goodness-of-fit indicated that norma...

Background & Aims of the Study: Petrochemical industry is an important industry in the economic development of the country that causes employees have exposure with several kinds of contamination. The aim of this study was Semi-quantitative assessment of the health risk of occupational exposure to chemical materials and investigation of spirometry in...