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- Ahmad Kiadaliri, Aliasghar, et al.
(författare)
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The prevalence of adulthood overweight and obesity in Tehran: findings from Urban HEART-2 study.
- 2015
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Ingår i: Medical Journal of the Islamic Republic of Iran. - 1016-1430. ; 29:178, s. 1-9
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND:To estimate and compare prevalence of overweight and obesity among adult people across the 22 districts of Tehran in 2011. METHODS:This was a cross-sectional study using data on 47,406 women and 47,525 men aged≥ 15 years from a large population-based survey (Urban HEART-2). Age-standardized prevalence (ASP) of overweight (25≤BMI<30) and obesity (BMI≥30) were estimated for the Tehran's districts. Pearson Chi2 tests and logistic regression were used to examine any significant differences in prevalence of these disorders across sociodemographic groups. RESULTS: ASPs of overweight were 36.5% and 32.0 % among men and women, respectively (p<0.001). These figures for obesity were 10.7% and 15.3% among men and women, respectively (p<0.001). Crude prevalence of overweight and obesity rose with age up to the age of 54 years and decreased thereafter. Across education groups, the lowest prevalence of overweight/obesity was seen among most educated people. The results showed that being young, single and student were associated with lower odds of overweight/obesity. CONCLUSION:This study showed a high prevalence of overweight and obesity among adult in Tehran. There were significant associations between sociodemographic characteristics and prevalence of overweight/obesity among adults in Tehran. The results of this study might be used in identifying high risk groups of overweight and obesity in Tehran.
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- Mahdavi Mazdeh, Mohammad, et al.
(författare)
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A heuristic to solve the dynamic lot sizing problem with supplier selection and quantity discounts
- 2015
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Ingår i: Computers & industrial engineering. - : Elsevier. - 0360-8352 .- 1879-0550. ; 85, s. 33-43
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Tidskriftsartikel (refereegranskat)abstract
- In the present study, the single-item dynamic lot sizing problem with supplier selection is investigated. The problem is broken down into two different cases. In the first case, quantity discounts are not taken into account; in the second case, incremental and all-unit quantity discounts are considered. Due to the complexity of the problems, a new heuristic is developed, which is based on the Fordyce-Webster Algorithm (Fordyce and Webster, 1984). In order to solve the problem where multiple suppliers are considered, a third dimension is added to the matrices used in the Fordyce-Webster Algorithm. The solutions gained using the proposed algorithm are similar to those of Parsa, Khiav, Mazdeh, and Mehrani (2013) in terms of accuracy and computational time. However, the implementation of matrices makes this method easy to explain in comparison with other heuristics developed for similar problems. (C) 2015 Elsevier Ltd. All rights reserved.
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