نتایج جستجو برای: saturation index
تعداد نتایج: 441553 فیلتر نتایج به سال:
introduction: chronic obstructive pulmonary disease (copd) secondary to sulfur mustard exposure, known as mustard lung, is an important late pulmonary complication. the bode (body mass index, obstruction, dyspnea, and exercise) index has been established as a valuable tool for determining the adverse consequences of copd. the aim of this study was to evaluate the role of the bode index in patie...
the simultaneous flow of oil and water in porous media is described by relative permeability curves, mainly derived from laboratory experiments. relative permeability is of paramount importance in predicting reservoir production performance and drive mechanisms and its value depends largely on the volume fraction of fluids present in the test samples. nowadays x-ray scanners are one of the most...
Background: Sleepiness that occurs at inappropriate or undesirable times or that interferes with daytime activities is generally considered excessive daytime sleepiness. Obstructive Sleep Apnea (OSA) is one of the most common causes of excessive daytime sleepiness. The aim of this study is to finds out the most important nocturnal polysomnographic parameters influencing daytime sleepiness in pa...
Background and aims: Established standards show that water should not be corrosive. Corrosive waters dissolve materials of which pipes, junctions, valves of municipal water delivery systems are made from and cause different hygiene, aesthetic, and economical problems in such water delivery systems. In addition, carbonates precipitation tendency of water due to creation of different layers in t...
Uranium becomes soluble and mobile under oxidizing conditions in aqueous environment, and presence of complexing agents with uranium increase this mobility. Existence of such conditions in groundwaters of Ayrakan and Cheshmeh Shotori areas has led to oxidation, solubility and mobility of uranium minerals. Hydrogeochemical study of uranium in the study areas reveals the presence of bicarbonate i...
OBJECTIVE To determine polysomnographic (PSG) variables that may potentially predict adverse respiratory events after pediatric adenotonsillectomy. DESIGN Retrospective, case-control study. SETTING Free-standing academic tertiary-care pediatric hospital. PATIENTS The study included 1131 patients undergoing adenotonsillectomy by 2 attending surgeons. There were no exclusion criteria. MAI...
ABSTRACT MATERIAL AND METHODS We prospectively evaluated 199 individuals with high pre-test clinical suspicion of OSAS. Of these, 123 patients were morbidly obese (Group A) and 76 were non-obese (Group B). We performed six channel cardio-respiratory polygraphy and assessed the correlation between the Desaturation Index (DI) and the Apnea Hypopnea Index (AHI) for both groups. RESULTS In gro...
introduction suitability of groundwater for drinking, irrigation and industrial purposes depends upon its quality. changes in groundwater quality are due to variation in climatic conditions, residence time of water with aquifer materials and inputs from soil during percolation of water. multivariate statistical methods are one of the common and important methods for hydro geochemistry study. sa...
Mapping Impervious Surface Area (ISA) at regional and global scales has attracted increasing interest. DMSP-OLS nighttime light (NTL) data have proven to be successful for mapping urban land in large areas. However, the well-documented issues of pixel blooming and saturation limit the ability of DMSP-OLS data to provide accurate urban information. In this paper, a multi-source composition index...
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