Mehmet Aydın | Inönü üniversitesi (original) (raw)

Papers by Mehmet Aydın

Archives of Orthopaedic and Trauma Surgery, 2000

To determine the fate of an impacted allograft after a minimum follow-up of 1 year, we examined 9... more To determine the fate of an impacted allograft after a minimum follow-up of 1 year, we examined 9 of 40 patients who underwent revision arthroplasty with the impaction grafting technique. The allograft used in this study was morselized cancellous freeze-dried allograft. We examined these 9 patients with technetium-99 m methylene diphosphonate bone scintigraphy at an average of 14 (range 12–20) months after surgery. All of them had a good clinical outcome, with an average postoperative Hip Society Score of 89 (range 65–98) and no evidence of radiolucency or subsidence on direct radiography. Scintigraphic examination demonstrated that the area corresponding to the allograft had a remarkable radioactivity accumulation suggesting new bone formation. The allograft in total hip revision using the impaction grafting technique undergoes a significant neovascularization and new bone formation. This study suggests than when vigorous impaction is used, freeze-dried cancellous allograft can be used for impaction grafting.

Procedia - Social and Behavioral Sciences, 2011

Procedia - Social and Behavioral Sciences, 2010

The aim of this study is to examine the mathematics teacher educators' beliefs about teacher role... more The aim of this study is to examine the mathematics teacher educators' beliefs about teacher role in teaching mathematics. Case study is preferred as research method. An interview form devised by the researcher, composed of open-ended and scenario type questions was used as the data collecting tool. Interviews taking average 60 minutes were carried out with five academicians from Karadeniz Technical University (KTU) Fatih Faculty of Education in spring term of 2006-2007 academic year. By using Magolda's Epistemological Reflection Model, the data obtained were analyzed. It was found that the participants' beliefs about teacher role fairly comply with the philosophical notion of the new mathematics curriculum in Turkey. We believe that by conducting similar studies with larger samples, it might be possible to get additional perspectives on and contribute to teacher training researches.

Procedia - Social and Behavioral Sciences, 2010

This study was conducted to determine the views of high school students about proof and these stu... more This study was conducted to determine the views of high school students about proof and these students' levels of proof. Case study method was used in this descriptive study. The data of the study were obtained by conducting a questionnaire which consists of eight open-ended questions to total 125 10 th grade students studying in two different secondary schools in Trabzon during 2006-2007 school year. The views of the students regarding proof were coded and their levels of proof were analyzed based on the classification of Miyazaki related to proof. At the end of the study, high school students' competencies of doing proof were found below the desired level, as well as their use of different proof types. Based on these results, it's recommended to give room in the classes to activities that would improve students' mathematical thinking skills and increase their levels of proof.

Procedia - Social and Behavioral Sciences, 2011

This study aims to examine the effect of instructional materials developed on the basis of 4 stag... more This study aims to examine the effect of instructional materials developed on the basis of 4 stage constructivist model on the success of 6 th 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 6 th 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.

Procedia - Social and Behavioral Sciences, 2009

The purpose of this study is to determine and compare how the attitudes towards mathematics of se... more The purpose of this study is to determine and compare how the attitudes towards mathematics of second grade students in elementary school changes according to some variables. This study was carried out by using survey method. As data collection tool, Mathematics Attitude Questionnaire (MAQ) which consists of 37 items each with five response alternatives covering the attitudes of students towards mathematics was used. In this research, this questionnaire was administered to 200 elementary school students from two different primary schools in 2007-2008 education terms in the city of Trabzon, TURKEY. The data were analyzed by One-Way (Factor) ANOVA and independent-samples t-tests using the statistical package program (SPSS 10.0). As a result, it is revealed that there are statistically significant differences in terms of the attitudes towards mathematics according to their grade levels, but gender of students.

Procedia - Social and Behavioral Sciences, 2009

This study aims to reveal the mathematics teachers' views about the 8 th grade mathematics textbo... more This study aims to reveal the mathematics teachers' views about the 8 th grade mathematics textbook (MTB) prepared according to the new primary education mathematics curriculum (NPEMC) which took effect in the 2005 -2006 education period for the first time. The study uses a case study method. Convenience sampling was used in order to obtain more in-depth knowledge. The data we examine came from the semi structured interviews conducted with 4 mathematics teachers working in different primary schools in Trabzon province. The results of the study are that the teachers experienced distress in finding the necessary materials required for the activities in the textbook and the activities could not be implemented effectively in the over-populated classes. The study ends with the recommendations as the materials required for the activities in the textbooks should be easily accessible and the activities should be prepared considering the number of students in mathematics classes.

Procedia - Social and Behavioral Sciences, 2010

Decimals are among the difficult subjects for the students because of its abstract nature. Theref... more Decimals are among the difficult subjects for the students because of its abstract nature. Therefore, the aim of this study is to develop instructional materials for students based on one of the four-stage models of constructivist approach related to the unit of "decimals". With this aim, a worksheet, analogy map and conceptual change text on the unit of decimals were developed. Case study method was used in the study. A pilot study was conducted with 32 6 th graders studying in an elementary school in Trabzon in order to use the instructional materials in the classes more effectively and to test their feasibility. At the end of this preliminary study, the students were determined to find the materials effective, visual and interesting. Therefore, it's recommended to use the materials developed during the course in mathematics classes and to develop similar materials for other subject matters.

Procedia - Social and Behavioral Sciences, 2011

This study investigates the effect on conceptual change of instructional materials about "decimal... more 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 6 th 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.

Procedia - Social and Behavioral Sciences, 2009

This study was conducted with the aim of comparing the behaviors and attainments related to the p... more This study was conducted with the aim of comparing the behaviors and attainments related to the plane geometry in the old and new 6th - 8th grade mathematics curricula (MC) in terms of Van Hiele geometry understanding levels. With this purpose document analysis method was used. In the study, the levels of behaviors and attainments in the old and new

Procedia - Social and Behavioral Sciences, 2009

The aim of this study is to focus on and attract attention at mathematics teacher educators&#... more The aim of this study is to focus on and attract attention at mathematics teacher educators' beliefs about assessment and to contribute to suffice the need in this field. In the study, interviews taking average 60 minutes were carried out with 5 academicians from KTU Fatih Faculty of ...

Archives of Orthopaedic and Trauma Surgery, 2000

To determine the fate of an impacted allograft after a minimum follow-up of 1 year, we examined 9... more To determine the fate of an impacted allograft after a minimum follow-up of 1 year, we examined 9 of 40 patients who underwent revision arthroplasty with the impaction grafting technique. The allograft used in this study was morselized cancellous freeze-dried allograft. We examined these 9 patients with technetium-99 m methylene diphosphonate bone scintigraphy at an average of 14 (range 12–20) months after surgery. All of them had a good clinical outcome, with an average postoperative Hip Society Score of 89 (range 65–98) and no evidence of radiolucency or subsidence on direct radiography. Scintigraphic examination demonstrated that the area corresponding to the allograft had a remarkable radioactivity accumulation suggesting new bone formation. The allograft in total hip revision using the impaction grafting technique undergoes a significant neovascularization and new bone formation. This study suggests than when vigorous impaction is used, freeze-dried cancellous allograft can be used for impaction grafting.

Procedia - Social and Behavioral Sciences, 2011

Procedia - Social and Behavioral Sciences, 2010

The aim of this study is to examine the mathematics teacher educators' beliefs about teacher role... more The aim of this study is to examine the mathematics teacher educators' beliefs about teacher role in teaching mathematics. Case study is preferred as research method. An interview form devised by the researcher, composed of open-ended and scenario type questions was used as the data collecting tool. Interviews taking average 60 minutes were carried out with five academicians from Karadeniz Technical University (KTU) Fatih Faculty of Education in spring term of 2006-2007 academic year. By using Magolda's Epistemological Reflection Model, the data obtained were analyzed. It was found that the participants' beliefs about teacher role fairly comply with the philosophical notion of the new mathematics curriculum in Turkey. We believe that by conducting similar studies with larger samples, it might be possible to get additional perspectives on and contribute to teacher training researches.

Procedia - Social and Behavioral Sciences, 2010

This study was conducted to determine the views of high school students about proof and these stu... more This study was conducted to determine the views of high school students about proof and these students' levels of proof. Case study method was used in this descriptive study. The data of the study were obtained by conducting a questionnaire which consists of eight open-ended questions to total 125 10 th grade students studying in two different secondary schools in Trabzon during 2006-2007 school year. The views of the students regarding proof were coded and their levels of proof were analyzed based on the classification of Miyazaki related to proof. At the end of the study, high school students' competencies of doing proof were found below the desired level, as well as their use of different proof types. Based on these results, it's recommended to give room in the classes to activities that would improve students' mathematical thinking skills and increase their levels of proof.

Procedia - Social and Behavioral Sciences, 2011

This study aims to examine the effect of instructional materials developed on the basis of 4 stag... more This study aims to examine the effect of instructional materials developed on the basis of 4 stage constructivist model on the success of 6 th 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 6 th 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.

Procedia - Social and Behavioral Sciences, 2009

The purpose of this study is to determine and compare how the attitudes towards mathematics of se... more The purpose of this study is to determine and compare how the attitudes towards mathematics of second grade students in elementary school changes according to some variables. This study was carried out by using survey method. As data collection tool, Mathematics Attitude Questionnaire (MAQ) which consists of 37 items each with five response alternatives covering the attitudes of students towards mathematics was used. In this research, this questionnaire was administered to 200 elementary school students from two different primary schools in 2007-2008 education terms in the city of Trabzon, TURKEY. The data were analyzed by One-Way (Factor) ANOVA and independent-samples t-tests using the statistical package program (SPSS 10.0). As a result, it is revealed that there are statistically significant differences in terms of the attitudes towards mathematics according to their grade levels, but gender of students.

Procedia - Social and Behavioral Sciences, 2009

This study aims to reveal the mathematics teachers' views about the 8 th grade mathematics textbo... more This study aims to reveal the mathematics teachers' views about the 8 th grade mathematics textbook (MTB) prepared according to the new primary education mathematics curriculum (NPEMC) which took effect in the 2005 -2006 education period for the first time. The study uses a case study method. Convenience sampling was used in order to obtain more in-depth knowledge. The data we examine came from the semi structured interviews conducted with 4 mathematics teachers working in different primary schools in Trabzon province. The results of the study are that the teachers experienced distress in finding the necessary materials required for the activities in the textbook and the activities could not be implemented effectively in the over-populated classes. The study ends with the recommendations as the materials required for the activities in the textbooks should be easily accessible and the activities should be prepared considering the number of students in mathematics classes.

Procedia - Social and Behavioral Sciences, 2010

Decimals are among the difficult subjects for the students because of its abstract nature. Theref... more Decimals are among the difficult subjects for the students because of its abstract nature. Therefore, the aim of this study is to develop instructional materials for students based on one of the four-stage models of constructivist approach related to the unit of "decimals". With this aim, a worksheet, analogy map and conceptual change text on the unit of decimals were developed. Case study method was used in the study. A pilot study was conducted with 32 6 th graders studying in an elementary school in Trabzon in order to use the instructional materials in the classes more effectively and to test their feasibility. At the end of this preliminary study, the students were determined to find the materials effective, visual and interesting. Therefore, it's recommended to use the materials developed during the course in mathematics classes and to develop similar materials for other subject matters.

Procedia - Social and Behavioral Sciences, 2011

This study investigates the effect on conceptual change of instructional materials about "decimal... more 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 6 th 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.

Procedia - Social and Behavioral Sciences, 2009

This study was conducted with the aim of comparing the behaviors and attainments related to the p... more This study was conducted with the aim of comparing the behaviors and attainments related to the plane geometry in the old and new 6th - 8th grade mathematics curricula (MC) in terms of Van Hiele geometry understanding levels. With this purpose document analysis method was used. In the study, the levels of behaviors and attainments in the old and new

Procedia - Social and Behavioral Sciences, 2009

The aim of this study is to focus on and attract attention at mathematics teacher educators&#... more The aim of this study is to focus on and attract attention at mathematics teacher educators' beliefs about assessment and to contribute to suffice the need in this field. In the study, interviews taking average 60 minutes were carried out with 5 academicians from KTU Fatih Faculty of ...