Modeling wind ribs effects for numerical simulation external pressure load on a cooling tower of KAZERUN power plant-IRAN

Goudarzi, Mohammad-Ali,Sabbagh-Yazdi, Saeed-Reza Techno-Press 2008 Wind and Structures, An International Journal (WAS Vol.11 No.6

In this paper, computer simulation of wind flow around a single cooling tower with louver support at the base in the KAZERUN power station in south part of IRAN is presented as a case study. ANSYS FLOTRAN, an unstructured finite element incompressible flow solver, is used for numerical investigation of wind induced pressure load on a single cooling tower. Since the effects of the wind ribs on external surface of the cooling tower shell which plays important role in formation of turbulent flow field, an innovative relation is introduced for modeling the effects of wind ribs on computation of wind pressure on cooling tower's shell. The introduced relation which follows the concept of equivalent sand roughness for the wall function is used in conjunction with two equations ${\kappa}-{\varepsilon}$ turbulent model. In this work, the effects of variation in the height/spacing ratio of external wind ribs are numerically investigated. Conclusions are made by comparison between computed pressure loads on external surface of cooling tower and the VGB (German guideline for cooling tower design) suggestions.

Modeling wind ribs effects for numerical simulation external pressure load on a cooling tower of KAZERUN power plant-IRAN

Mohammad-Ali Goudarzi,Saeed-Reza Sabbagh-Yazdi 한국풍공학회 2008 Wind and Structures, An International Journal (WAS Vol.11 No.6

In this paper, computer simulation of wind flow around a single cooling tower with louver support at the base in the KAZERUN power station in south part of IRAN is presented as a case study. ANSYS FLOTRAN, an unstructured finite element incompressible flow solver, is used for numerical investigation of wind induced pressure load on a single cooling tower. Since the effects of the wind ribs on external surface of the cooling tower shell which plays important role in formation of turbulent flow field, an innovative relation is introduced for modeling the effects of wind ribs on computation of wind pressure on cooling tower's shell. The introduced relation which follows the concept of equivalent sand roughness for the wall function is used in conjunction with two equations κ-ε turbulent model. In this work, the effects of variation in the height/spacing ratio of external wind ribs are numerically investigated. Conclusions are made by comparison between computed pressure loads on external surface of cooling tower and the VGB (German guideline for cooling tower design) suggestions.

Participation of the Women Covered by Family Physicians in Breast Cancer Screening Program in Kerman, Iran

Jafari, Mohammad,Nakhaee, Nouzar,Goudarzi, Reza,Zehtab, Nooshin,Barouni, Mohsen Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.11

Background: Mammography screening is a method for reducing breast cancer mortality in women over 40 years old. A participation rate of at least 70% is a prerequisite for screening programs. This study aimed at determining the participation rate of women in breast cancer screening in Iran. Materials and Methods: The study population in this prospective research consisted of 35 to 69 years old women in the villages and towns Kerman District, in 2013. The data were collected by a well-validated risk assessment questionnaire. The questionnaires were completed with the help of health workers and technicians in the health centers, who were trained on breast cancer screening program. Results: As a whole, 19,651 women were invited to complete the questionnaire, of whom 15,794 women (80.37%) completed it. In the urban region, of 3150 eligible women 2728 women (86.60%) participated in the study. The acceptance rates for mammography in rural and urban regions were 34.95% and 8.75%, respectively. Conclusions: Finally, 3.8% and 16.34% of 35 to 69 years old women in the urban regions were mammographed, respectively. Conclusion: The low participation of eligible women in breast cancer screening program alerts us against including the program in the health insurance package.

Cost-Effectiveness Analysis of Breast Cancer Screening in Rural Iran

Zehtab, Nooshin,Jafari, Mohammad,Barooni, Mohsen,Nakhaee, Nouzar,Goudarzi, Reza,Zadeh, Mohammad Hassan Larry Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.2

Background: Although breast cancer is the most common cancer in women, economic evaluation of breast cancer screening is not fully addressed in developing countries. The main objective of the present study was to analyze the cost-effectiveness of breast cancer screening using mammography in 35-69 year old women in an Iranian setting. Materials and Methods: This was an economic evaluation study assessing the cost-effectiveness of a population-based screening program in 35-69 year old women residing in rural areas of South east Iran. The study was conducted from the perspective of policy-makers of insurance. The study population consisted of 35- to 69-year old women in rural areas of Kerman with a population of about 19,651 in 2013. The decision tree modeling and economic evaluation software were used for cost-effectiveness and sensitivity analyses of the interventions. Results: The total cost of the screening program was 7,067.69 US$ and the total effectiveness for screening and no-screening interventions was 0.06171 and 0.00864 disability adjusted life years averted, respectively. The average cost-effectiveness ratio DALY averted US$ for screening intervention was 7,7082.5 US$ per DALY averted and 589,027 US $ for no-screening intervention. The incremental cost-effectiveness ratio DALY averted was 6,264 US$ per DALY averted for screening intervention compared with no-screening intervention. Conclusions: Although the screening intervention is more cost-effective than the alternative (noscreening) strategy, it seems that including breast cancer screening program in health insurance package may not be recommended as long as the target group has a low participation rate.

Age of Natural Menopause and Related Factors among the Tabari Cohort

Marzieh Zamaniyan,Mahmood Moosazadeh,Sepideh Peyvandi,Kaveh Jaefari,Reza Goudarzi,Mahdi Moradinazar,Motahareh Kheradmand 대한폐경학회 2020 대한폐경학회지 Vol.26 No.1

Objectives: The age of menopause is affected by several factors. In this study we aimed to identify the age of natural menopause and its related factors in a large-scale population-based cohort in Iran. Methods: In this study, a subset of data collected during the enrollment phase of the Tabari cohort study was utilized. Reproductive history and other related data were collected using a structured questionnaire. Blood samples were obtained from all participants. Data were analyzed using chi-square test, independent t test, and ANOVA as well as a multivariate linear regression model. Results: Among participants of the Tabari cohort, 2,753 were menopausal women. The mean age of natural and induced menopause was 49.2 ± 4.7 and 43.2 ± 6.4 years, respectively (P = 0.001). The number of pregnancies, duration of breastfeeding, level of education, residency, presence of thyroid disease, and body mass index affected the age of menopause. After adjustments for confounding variables, the number of pregnancies remained significantly associated with late menopause. Conclusions: The age of natural menopause in this study was similar to that in other studies, and the number of pregnancies was positively associated with the age of menopause after adjustments for confounding variables.

Porous electrospun poly(e-caprolactone)/gelatin nanofi brous mat containing cinnamon for wound healing application: in vitro and in vivo study

Majid Salehi,Maryam Niyakan,Arian Ehterami,Saeed Haghi-Daredeh,Simin Nazarnezhad,Ghasem Abbaszadeh-Goudarzi,Ahmad Vaez,Seyedeh Fatemeh Hashemi,Nariman Rezaei,Seyed Reza Mousavi 대한의용생체공학회 2020 Biomedical Engineering Letters (BMEL) Vol.10 No.1

In this study, cinnamon (cin) was loaded into poly(ε-caprolactone)/gelatin (PCL/Gel) nanofi brous matrices in order to fabricatean appropriate mat to improve wound healing. Mats were fabricated from PCL/COLL [1:1 (w/w)] solution with 1, 5and 25% (w/v) of cinnamon. Prepared mats were characterized with regard to their microstructure, mechanical properties,porosity, surface wettability, water-uptake capacity, water vapor permeability, blood compatibility, microbial penetration andcellular response. The fabricated mats with and without cinnamon were used to treat the full-thickness excisional wounds inWistar rats. The results indicated that the amount of cinnamon had a direct eff ect on porosity, mechanical properties, wateruptake capacity, water contact angle, water vapor transmission rate and cell proliferation. In addition, the results of in vivostudy indicated that after 14 days, the wounds which were treated with PCL/Gel 5%cin had better wound closure (98%)among other groups. Our results suggest that the cinnamon can be used as a suitable material for wound healing.