نتایج جستجو برای: linear trend

تعداد نتایج: 595865  

Meteorological parameters play a significant role in affecting ambient air quality of an urban environment. As Dhaka, the capital city of Bangladesh, is one of the air pollution hotspot among the megacities in the world, however the potential meteorological influences on criteria air pollutants for this megacity are remained less studied. The objectives of this research were to examine the rela...

2010
Chaoyang Li Earl S. Ford Benyi Li Wayne H. Giles Simin Liu

OBJECTIVE We sought to assess the associations of testosterones and sex hormone-binding globulin (SHBG) with metabolic syndrome and insulin resistance in men. RESEARCH DESIGN AND METHODS We defined metabolic syndrome according to the National Cholesterol Education Program Expert Panel on Detection, Evaluation, and Treatment of High Blood Cholesterol in Adults. Among men aged >or=20 years who ...

In this paper, an purchasing inventory model for deteriorating items is developed with a linear, positive trend in demand, allowing inventory shortages and backlogging. It is assumed that the goods in the inventory deteriorate over time at a constant rate . Two models are developed for two operational policies. The first policy covers the case that the inventory model with linear demand for det...

2011
Daichi Shimbo Paul Muntner Devin Mann R. Graham Barr Weihong Tang Wendy Post Joao Lima Gregory Burke David Bluemke Steven Shea

Increased left ventricular (LV) mass and changes in LV geometry may precede hypertension onset. The authors examined the associations of LV mass and geometry, assessed by cardiac magnetic resonance imaging, with hypertension incidence in 2,567 normotensive participants enrolled in 2000–2002 in the Multi-Ethnic Study of Atherosclerosis, an ethnically diverse, population-based, US study. Over a m...

Journal: :American journal of epidemiology 2011
Daichi Shimbo Paul Muntner Devin Mann R Graham Barr Weihong Tang Wendy Post Joao Lima Gregory Burke David Bluemke Steven Shea

Increased left ventricular (LV) mass and changes in LV geometry may precede hypertension onset. The authors examined the associations of LV mass and geometry, assessed by cardiac magnetic resonance imaging, with hypertension incidence in 2,567 normotensive participants enrolled in 2000-2002 in the Multi-Ethnic Study of Atherosclerosis, an ethnically diverse, population-based, US study. Over a m...

Journal: :Diabetes care 2007
Yiling J Cheng Edward W Gregg Nathalie De Rekeneire Desmond E Williams Giuseppina Imperatore Carl J Caspersen Henry S Kahn

OBJECTIVE Muscle-strengthening activities (MSAs) may increase insulin sensitivity, thereby reducing the risk of diabetes. The purpose of this study was to assess the relationship between MSAs and insulin sensitivity among American adults. RESEARCH DESIGN AND METHODS We analyzed data on 4,504 adults without diabetes, aged 20-79 years, who participated in the National Health and Nutrition Exami...

Journal: :Cancer research 1988
M C Yu C C Mo W X Chong F S Yeh B E Henderson

One hundred twenty-eight mothers of nasopharyngeal carcinoma (NPC) cases under age 45 in Yulin Prefecture, China and 174 mothers of population controls were interviewed as part of an epidemiological study to examine childhood exposures in relation to the development of NPC. Exposure before age 2 years to a number of fermented foods was a risk factor for NPC. During weaning, intake of salted fis...

Journal: :BMC Public Health 2009
Leonore M de Wit Annemieke van Straten Marieke van Herten Brenda WJH Penninx Pim Cuijpers

BACKGROUND Results of studies concerning the association between obesity and depression are conflicting. Some find a positive association, some a negative association and some find no association at all. Most studies, however, examine a linear association between Body Mass Index (BMI) and depression. The present study investigates if a nonlinear (U-shaped) trend is preferable over a linear tren...

Dong-Soo, Kim, Wook Choo, Yun, حسن بازیار, محمد, رابطی مقدم, مسعود,

In this paper,  a numerical model  was first verified against dynamic centrifuge tests results performed on an underground subway tunnel and then, the effect of underground structure on peak ground acceleration (PGA) at the ground surface investigated considering linear and nonlinear behavior for the soil. The results show that in the range of natural frequency of the system, nonli...

fatemeh zakerhosseini, Kazem Hemmadi

In arid and semi-arid regions, soil surface warming is a considerable phenomenon causing a high thermal gradient which makes water flow intensely. The degree of soil temperature is effective on crop production, plant growth and soil microorganisms. In recent years, the ascending trend of temperature has been substantially noticed by researchers in the issues of pointwise climate change and at w...

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