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Articles by Ahmet OZTURK
Total Records ( 5 ) for Ahmet OZTURK
  Ahmet Ozturk and Zaki Iqbal
  Concentrated Solar Power (CSP) is a commonly researched branch of renewable energy technologies. Linear Fresnel Reflector (LFR) systems are also not a very niche topic in CSP. This study aims to approach the LFR systems in a quite different concept, by considering a new way of solar tracking. In this study, the Fresnel mirrors are fixed on a rotating platform which can track the sun’s azimuth angle by rotation. An analytical model to populate the mirrors on a defined area is developed and using the model a mirror setup is generated. Moreover, the effects of the structural parameters on the solar yield are analyzed by using a ray tracing software. When analyzing the solar yield the study keeps focus on the optical parts of LFR systems.
  Ahmet Ozturk
  While the main objective of drainage requirement in the semi-arid region such as south-eastern Anatolia is generally salinity control, other objectives may also be important. Because of irrigation, salinity problems have occurred in many areas in Harran Plain. There is no subsoil drainage system in the plain. In this study, proper drain depth, drain diameter and drain spacing are determined and evaluated depending on soil and plant features of the plain. In the plain, drain depth, drain diameter and drain spacing are proposed as 1.8-2.0 m, 100 mm and 21.3 m, respectively.
  Serpil AYDIN , Ayfer O. BOZKAYA , Mumtaz MAZICIOGLU , Ayfer GEMALMAZ , Alis OZCAKIR and Ahmet OZTURK

Aims: The use and cost of complementary/alternative medicine (CAM) has been gaining in importance worldwide. Herbal medicine is one of the most commonly used methods. To understand the effectiveness, reliability, and quality of CAM and provide standardization in its analysis, its prevalence and the factors influencing its use must be identified. This study was conducted to identify the prevalence of CAM use and the effective factors in our population.
Materials and Methods: A stratified multistage probability sampling design was used in this cross-sectional, population-based study, which was conducted in Aydin. Participants were interviewed face to face by trained interviewers with a questionnaire. The answers for the open-ended questions were categorized. Univariate and multiple (backward Wald) logistic regression and chi-square test were used for the statistical analysis. A P value <0.05 was considered as statistically significant.
Results: Totally, 873 people completed the questionnaire; 539 (61.7%) were female, 334 (38.3%) were male. Fifty-eight percent of the participants (n: 511) reported that they had used a CAM method at least once in the previous year. More than half of the participants had used herbal medicine (55.4%), and the most commonly used herb was lime (n: 426, 88.1%). The reasons for the use of herbal medicine were mostly for prevention and for treatment. In the previous year, 233 (26.7%) of the participants stated that they had applied one of the CAM methods as a treatment for their children. Health status perception, being a nonsmoker and belief that ‚ÄúCAM was superior to conventional medicine‚Ä? were determined as the factors that influenced CAM use.
Conclusions: CAM, especially herbal medicine, is commonly used in our population, and individuals use these methods not only for themselves but also for their children.

  Betul CİCEK , Ahmet OZTURK , Mumtaz M. MAZICIOGLU , Neriman INANC and Selim KURTOGLU
  Determination of fat and fat-free mass is of considerable interest in evaluation of nutritional status. The aim of the present study was to determine whether using arm fat area (AFA) is helpful in identifying abdominal obesity (waist circumference &gt; 90<sup>th</sup> percentile) in Turkish children and adolescents with high risk. According to AFA &amp;#8805; 85<sup>th</sup> percentile indicating overweight, we determined age- and gender-specific cut-offs from anthropometric indices. Materials and methods: This study was conducted with 5358 (2621 boys, 2737 girls) children and adolescents aged 6-17 years. Height, weight, arm span, waist circumference (WC), mid-upper arm circumference (MUAC), and triceps skinfold thickness (TSF) were measured. BMI, fat percentage, waist-to-height ratio (WHtR), waist-to-arm span ratio (WASR), and arm fat area (AFA) were calculated. Results: According to AFA, overweight prevalence was 14.9% for the entire group. According to ROC analysis, the best predictors to explain overweight were BMI, WC, WHtR, and WASR for 6.0- to 10.9- and 11.0- to 13.9-year-old boys; BMI for 6.0- to 10.9-year-old girls; weight, BMI, and WC for 11.0- to 13.9-year-old girls. While weight, BMI, WC, and WHtR were the best predictors of being overweight for 14.0- to 17.9-year-old boys; they were BMI, WC, and weight for the girls in the same age range. According to WC &gt; 90<sup>th</sup> percentile; for 6.0- to 10.9-years, 11.0- to 13.9-years, and 14.0- to 17.9-years the AUCs of AFA for boys were 0.84, 0.90, and 0.88; and for girls those values were 0.81, 0.87, and 0.88. Conclusion: AFA can be a significant index with WC in determining abdominal obesity.
  Ahmet OZTURK , Serpil POYRAZOGLU and Sule SARLI
  Aim: A law prohibiting smoking in the enclosed areas of public and private workplaces was put into effect in Turkey on 19 May 2008. The objective of this study was to evaluate the effect of this law upon the smoking habits of the employees in this short period of 3 months. Materials and methods: This study was performed in Kayseri, in 3 public and 3 private workplaces, comprising 868 employees. A questionnaire was filled out, face-to-face, in the second week of August. Results: The ratio of the people supporting this smoke-free law was 68.7%. Among the employees who were smoking when the law was put into effect, 5 (1.5%) of them have stated that they quit smoking because of the law, within 3 months. Among employees still smoking, 54.1% stated that the number of cigarettes they smoked in the workplace had decreased following this law, and 43.4% stated that the number of cigarettes smoked during the entire day had decreased. The mean number of cigarettes smoked had decreased from 10.8 to 8.1 in the workplace and from 15.6 to 13.0 during the entire day. Conclusion: It was revealed that this new smoke-free law has been effective in decreasing the number of cigarettes smoked, both in the workplace and during the day.
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