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    The effect of instructional materials developed in relation to decimal fractions on success
    (Elsevier Science Bv, 2011) Yildiz, Cemalettin; Taskin, Duygu; Kogce, Davut; Aydin, Mehmet
    This study aims to examine the effect of instructional materials developed on the basis of 4 stage constructivist model on the success of 6th grade students in the subject of decimal fractions. For this purpose, a worksheet on decimal fractions, a conceptual change text and an anology map were developed. These instructional materials were administered to 62 students selected from two different 6th grade classes in a primary school in Trabzon in 2008-2009 school year. Semi-experimental method was used in this study. At the end of the study, it was seen that the instructional materials developed increased students' success. (C) 2011 Published by Elsevier Ltd.
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    The effect of instructional materials on decimal fractions to the conceptual change
    (Elsevier Science Bv, 2011) Yildiz, Cemalettin; Taskin, Duygu; Aydin, Mehmet; Kogce, Davut
    This study investigates the effect on conceptual change of instructional materials about decimal fractions developed by adopting 4 stage constructivist learning model. The study was conducted with 30 students 6th grade at a public elementary school in Trabzon during the spring term of 2008-2009 school year. Case study method was used in the study. The clinical interviews were made with 6 students just before the application and one month later. When the students' responses to the interview questions after the application were investigated, it was identified that the number of students' responses containing misconceptions was decreased at the end of the study. (c) 2011 Published by Elsevier Ltd. Open access under CC BY-NC-ND license.
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    Expectations of primary mathematics student teachers from their instructors and classmates
    (Elsevier Science Bv, 2011) Kogce, Davut; Yildiz, Cemalettin; Aydin, Mehmet
    This study was conducted to determine freshman mathematics student teachers' expectations from their instructors and classmates in terms of contribute to their career development. In this study, case study method was used. A questionnarie with 2 open-ended questions was administered to total 152 freshman mathematics student teachers enrolled to Department of Elementary Mathematics Education, in Fatih Faculty of Education, in autumn semester of 2009-2010 academic year. As a result, it is revealed that freshman mathematics student teachers expect from their instructors about learning environment, exam question, assessment and evaluation and social relations between instructor and students. (c) 2011 Published by Elsevier Ltd. Open access under CC BY-NC-ND license.
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    Increased Epicardial Fat Thickness Is Associated with Cardiac Functional Changes in Healthy Women
    (Tohoku Univ Medical Press, 2012) Kilicaslan, Baris; Ozdogan, Oner; Aydin, Mehmet; Dursun, Huseyin; Susam, Ibrahim; Ertas, Faruk
    Epicardial fat tissue is a visceral fat depot with anatomical and functional contiguity to the myocardium and coronary arteries. The objective of this study was to evaluate the association between epicardial fat thickness (EFT) and cardiac changes in healthy female subjects. The study population consisted of ninety-six consecutive healthy female (mean age 31.1 +/- 6.7 years) who underwent transthoracic echocardiography. EFT was measured by echocardiography. Subjects were divided into two groups according to the EFT; EFT < 6 mm and EFT >= 6 mm. The cardiac structural changes, increased left atrial volume indices (LAVI) (41.2 +/- 9.9 vs. 52.6 +/- 12.5, p = 0.001) and left ventricular mass indices (LVMI) (129.6 +/- 32.1 vs. 155.6 +/- 31.6 p < 0.05), were observed in patients with increased EFT. Myocardial tei index (MTI), which was used to evaluate both systolic and diastolic functions, was higher with increased EFT (0.44 +/- 0.07 vs. 0.48 +/- 0.08, p = 0.02). The correlation analysis revealed significant correlation between EFT and each of LAVI (r = 0.312, p = 0.002), LVMI (r = 0.301, p = 0.003), body mass index (BMI) (r = 0.8, p < 0.001), and MTI (r = 0.27, p = 0.005). Multivariate regression analysis demonstrated that EFT was associated with BMI (t = 5.28, p = 0.001), MTI (r = 2.39, p = 0.019), LVMI (r = 2.16, p = 0.01), and LAVI (r = 3.21, p = 0.002). In conclusion, EFT is an important predictor of cardiac alterations in women who are prone to obesity.