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https://hdl.handle.net/20.500.12451/47

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Emerging trajectory for disembedding: An online educational program for spatial thinking in a context of visual arts and mathematics education
(Springer Science and Business Media Deutschland GmbH, 2024) Kuş, Mehtap; Newcombe, Nora S.
This study interpreted students’ disembedding skills within the intersecting context of visual arts and mathematics, drawing upon studies on psychology, arts, and mathematics education. It aimed to identify an emerging trajectory for disembedding skill development by employing a design-based research methodology and novel interpretation of works of art. The study involved seven sixth grade students, following one-on-one teaching experiments with six students. They participated in an online program to support students’ spatial thinking, utilizing GeoGebra Classroom. Video recordings were watched, and students’ talks and drawings were analyzed to build an understanding of disembedding. The findings of the study revealed traces of shifts in students’ interpretation of works of art through the lens of disembedding. This study could contribute to our understanding of how learners develop spatial thinking in informal learning settings like mathematics and art museums.
Analyzing undergraduate students' self confidence levels in terms of some variables
(Elsevier, 2010) Avcu, Ramazan; Işıklar, Abdullah; Şar, Ali Haydar
Self confidence has a very significant impact both on expressing yourself during interpersonal relations and making up relations with others. Acting without self confidence may lead to isolation or retreatment of an individual from society. Because of that, therapists have been very much concerned about self confidence. Many people have difficulty in asserting their rights. These people should increase their self confidence levels in proper situations. In this context, self confidence education consists of modeling people who are self confident, acting to show that you are self confident enough and reacting instantly. This research was made in order to analyze undergraduate students' self confidence levels in terms of some variables. The population of the study consisted of four departments at Aksaray University. As a sample, 168 students studying at Aksaray University took part in. Data were collected via a scale measuring Self confidence levels of students. In data analyses, descriptive analyses, t-test and ANOVA were used. Results of the study showed that there was significant difference in terms of gender and departments. (C) 2010 Elsevier Ltd. All rights reserved.
Investigation of The Pre-Service Science Teachers' Opinions About The Concept of "Semi-Conductor"
(American Institute Physics, 2017) Eryılmaz Muştu, Özlem; Akkus, B; Oktem, Y; Dogan, GS; Guzelcimen, F
In the current study, the purpose was to determine the pre-service science teachers' opinions about the concept of semi-conductor. The participants of the current study carried out in 2015-2016 academic year were 55 third year pre-service science teachers. In the study, open-ended questions were used to determine the pre-service teachers' opinions about semi-conductors. After the administration of the open-ended questions, the students were taught the topic of semiconductors within the lesson of special issues in physics. Then the open-ended questions were directed to the pre-service teachers again. The pre-service teachers' responses to these questions were categorized by using qualitative analysis method and their frequency values were obtained. The findings of the study revealed that the pre-service teachers had difficulties, before and after the administration of the questions, in defining semi-conductors. At the end of the study, the pre-service teachers were found to have some misconceptions; for example, they think that semi-conductors conduct the half of the electricity conducted by conductors. In the study, it was found that the pre-service teachers cannot define the concept of semi-conductor and this might indicate that they will not be able to teach this concept when they become teachers. In this connection, it can be suggested that studies and activities performed for teaching of abstract concepts such as conductor, semi-conductor, and insulator should be increased.
Illumination effect on admittance measurements of polyvinyl alcohol (Co, Zn-doped)/n-Si Schottky barrier diodes in wide frequency and applied bias voltage range
(2011) Yerişkin, Seçkin Altındal; Uslu, Habibe; Tunç, Tuncay; Altındal, Şemsettin
In order to have a good interpretation of the illumination effect on the capacitance-voltage (C-V) and conductance-voltage (G/?-V) profiles, C-V and G/?-V characteristics of the polyvinyl alcohol (Co, Zn-Doped)/n-Si Schottky barrier diodes (SBDs) were investigated in the wide frequency and applied bias voltage ranges at room temperature. Experimental results show that the values of both C and G/? are strong functions of frequency and applied bias voltage in dark and under illumination (200 W) conditions. It is clear that the dispersion in C and G/? is considerably high in the depletion and accumulation regions due to illumination induced electron-hole pairs and series resistance (R s) effect, respectively. The values of C and G/? exponentially decrease with the increasing frequency and at high frequencies (f>100kHz) the values of C and G/? become almost independent of frequency both in dark under illumination. © 2011 American Institute of Physics.
An Introduction to the New Type of Globally Framed Manifold
(American Institute Physics, 2017) Aktan, Nesip; Tekin, Pelin; Akdemir, AO; Ekinci, A.; Han, I.; Set, E.; Dadasoglu, F.; Karagoz, K.; Oztekin, A.
The purpose of this paper is to give an introduction to new type of globally framed manifolds. Such manifolds are called globally framed nearly Sasakian manifolds. We show that a normal globally framed nearly Sasakian manifold is an S-manifold.
The use of photolithography on molecular orientation of the liquid crystals
(American Institute Physics, 2017) Yılmaz, Süleyman; Akkus, B; Oktem, Y; Dogan, GS; Guzelcimen, F
The photolithography was used on molecular orientation of liquid crystals as an alternative to other conventional methods. Either planar or homeotropic orientation were provided with surface anchoring energy for the molecular alignment. The photolithography were applied to provide micro-grooving on the film surface, which is including polyimide coatings, UV exposure, chemical etching and thermal curing process, respectively. Three type liquid crystal cells were made by provided nibbing and photolithography for planar alignment and also homeotropic alignment. Electro-optical properties of the liquid crystals were examined under the electric field at phase transition region for three type liquid crystal cells. It was observed that the photolithographic method was the more effective and acceptable results than the other conventional methods on the molecular orientations.
Illumination dependent admittance characteristics of Au/Zinc acetate doped polyvinyl alcohol (PVA:Zn)/n-Si Schottky barrier diodes (SBDs)
(American Institute Physics, 2011) Taşçıoğlu, İlke; Aydemir, Umut; Altındal, Şemsettin; Tunç, Tuncay; Aslan, MH; Oral, Ay; Özer, M.; Çağlar, SH
This study presents the effect of illumination on main electrical parameters of Schottky barrier diode (SBD). The admittance (capacitance-voltage (C-V) and conductance-voltage (G/omega-V)) characteristics of Au/Zinc acetate doped polyvinyl alcohol (PVA:Zn)/n-Si SBD were investigated in dark and under various illumination intensities. Experimental results demonstrate that the C-V plots give a peak due to the illumination induced interface states or electron-hole pairs at metal/semiconductor (M/S) interface. The C-2-V plots were also drawn to determine main electrical parameters such as doping concentration (N-D), depletion layer width (W-D) and barrier height (Phi(B)(C-V)) of device. In addition, the voltage dependence R-s values were obtained from C-V and G/omega-V data by using Nicollian and Brews method. In order to obtain the real diode capacitance and conductance, the high frequency (1 MHz) C-m and G(m)/w values were corrected for the effect of series resistance. All these observations confirm that both C-V and G/w-V characteristics were strongly affected by illumination.
Use of learning diaries in a nature education project as an evaluation tool
(Iated-İnt Assoc Technology Education A& Development, 2010) Varnacı Uzun, Funda; Uzun, Naim; Keleş, Özgül; Chova, LG; Belenguer, DM; Torres, IC
In the present study, the aim is to investigate the use of learning diaries to evaluate the contributions of the activities to the pre-service teachers carried out within the framework of the nature education project and to provide the literature with an example of using learning diaries as an evaluation tool. The study group consists of 25 pre-service teachers from 15 different universities participating in the project entitled "Nature Education Project in Ihlara Valley (Aksaray) and Its Surrounding". The project was supported by The Scientific and Technological Research Council of Turkey (TUBITAK). In the study, the participating students were asked to write learning diaries daily throughout the ten-day project about their daily activities. Descriptive analysis was used to analyze the students' diaries. In light of the findings of the study, it was found that dairies are effective tools in the evaluation process of the nature education. It is suggested that the students should be encouraged to write learning diaries throughout their nature education.
Reflection of primary school 6th grade mathematics activities on the development of students mathematical thinking
(ELSEVIER SCIENCE BV, 2011) Sarpkaya Aktaş, Gülfem; Karamik, Gözdegül Arık; Bulut, Neslihan; Akcamete, G; Uzunboylu, H; Oulmu, S; Karahoca, A; Babadoan, C; Ozdamli, F; Kanbul, S
The purpose of this study is to investigate 6th grade math class activities with students in classroom interactions in terms of development of mathematical thinking respectively. Qualitative research methods, case study was used to work. The case has been appointed as the classroom activities. In this context, a primary school 6th grade mathematics teacher's video recordings were examined for 120 minutes. Classroom communication is analyzed separately for each activity with regard to the categories. Results indicated that in learning and teaching process students and teacher carried out 8 sub-categories which belong to "Organize their mathematical thinking through communication" category.
Secondary school teachers' opinions about in-service teacher training: a focus group interview study
(ELSEVIER SCIENCE BV, 2012) Bozkurt, Esra; Kavak, Nusret; Yamak, Havva; Canbazoğlu Bilici, Sedef; Darıcı, Özlem; Özkaya, Yıldırım; Baskan, GA; Ozdamli, F; Kanbul, S; Ozcan, D
The aim of this study is to determine the secondary school teachers' opinions about in-service teacher training programs in Turkish Educational System. hi order to provide in-depth information about teachers' opinions, the focus group interview method was used in this research. She participants of this study are nine secondary school teachers. The findings revealed that teachers strongly desire to receive trainings on curriculum, scientific developments in their own fields; drama and theater. Teachers suggest that a needs analysis should be conducted in order to inform for planning of trainings.
The relationship between geometry attitudes and self-efficacy beliefs towards geometry
(ELSEVIER SCIENCE BV, 2010) Ünlü, Melihan; Avcu, Seher; Avcu, Ramazan; Keser, H; Ozcinar, Z; Kanbul, S
The aim of this study was to investigate the relationship between geometry attitude scores and self-efficacy scores towards geometry. Thus, correlational model was used in the process of the study and convenience sampling method was used. The research was conducted with 126 pre-service elementary mathematics teachers studying at Aksaray University Education Faculty in 2010-2011 academic year. In investigating the relationship between geometry attitudes and self-efficacy beliefs about geometry "Self-efficacy scale towards geometry" developed by Canturk-Gunhan and Baser and "Geometry attitude scale" developed by Bindak were used. The results of the study revealed that, pre-service teachers' geometry attitude scores and self-efficacy scores towards geometry is high. In addition, there is a strong positive relationship between pre-service teachers' geometry attitudes and self-efficacy beliefs towards geometry.
The understanding levels of preservice teachers' of basic science concepts' measurement units and devices, their misconceptions and its causes
(ELSEVIER SCIENCE BV, 2010) Keleş, Özgül; Ertaş, Hülya; Uzun, Naim; Cansız, Mustafa; Keser, H; Ozcinar, Z; Kanbul, S
In this study it is aimed to determine preservice science teachers' and elementary teachers' level of understanding about measurement units, and devices; and misconceptions about basic science concepts (mass, weight, density, heat, temperature, energy, specific heat etc.). The sample included 92 undergraduate students who are second year preservice elementary teacher; and first and second year elementary science teacher. In this study the data was collected through data meaning-analysis table, which is one of the types of related diagram. In order determine the cause of the problems they encounter while learning measurement devices and units, 12 participants were interviewed using open-ended questions as well. It has been found that preservice teachers have misconceptions in the concepts and units about mass, weight, heat, temperature, energy and specific heat. Interview showed that more attention should be given to related courses which focus on measurement devices and units.
The evaluation of primary and secondary teachers' opinions about in-service teacher training
(Elsevier Science Bv, 2012) Kavak, Nusret; Yamak, Havva; Canbazoğlu Bilici, Sedef; Bozkurt, Esra; Darıcı, Özlem; Özkaya, Yıldırım; Baskan, GA; Ozdamli, F; Kanbul, S; Ozcan, D
aim of this study is to determine the opinions of the primary and secondary school teachers about in-service teacher training programs in Turkish Educational System. In-service Teacher Training Inventory (ITTI) developed by Yamak et al. (2011) was administered to 681 teachers from 26 different schools in Ankara. The main results of this study showed that teachers don't prefer distance learning although nearly all of them have computers and internet access at home. According to teachers' opinions, in-service teacher trainings should be carried out in teachers' own schools, within working hours, by university lecturers who are experts in their fields. (C) 2012 Published by Elsevier Ltd. Selection and/or peer review under responsibility of Prof. Dr. Huseyin Uzunboylu
A study of pre-service science teacher's graphing skills
(Elsevier, 2012) Kılıç, Didem; Sezen, Nazan; Sarı, Meltem; Baskan, GA; Ozdamli, F; Kanbul, S; Ozcan, D
Teaching students how to read, to interpret and to construct graphs is a substantial educational object and it is also concluded that the students who can read graphs acquire additional capabilities, which will become more useful in science education. In the present study, it is aimed to investigate pre-service science teachers' graphing skills and to determine their difficulties in reading and interpreting graphs. The study was carried out with 128 pre-service science teachers. Multiple-choice test items and open-ended questions were used to evaluate graphing skills of pre-service teachers. As a general result of study graph reading and interpretation skills of pre-service teachers are inadequate and also their graphing performances vary depending on the type of graph. (C) 2012 Published by Elsevier Ltd. Selection and/or peer review under responsibility of Prof. Dr. Huseyin Uzunboylu
Preschool teacher training systems in Turkey and european union countries
(Elsevier, 2011) Kayhan, Hatice Nilay; Kılıç Mocan, Didem; Akcamete, G; Uzunboylu, H; Oulmu, S; Karahoca, A; Babadoan, C; Ozdamli, F; Kanbul, S
Providing well-qualified educational environments to children in early years of their lives is effective on development levels of countries. In this context, processes followed during preschool teacher training play distinctive role. In this study, it is aimed to examine the preschool teacher training systems in Turkey and European Union countries. To this purpose, currently being implemented in Turkey, preschool teacher training model, educational institutions, training period, programs and entry requirements were evaluated with applications in several EU countries. Although there are some differences in some scopes, as a result of this study there is not a wide inconsistency between preschool teacher training systems of EU countries and Turkey. (C) 2011 Published by Elsevier Ltd. Open access under CC BY-NC-ND license.
A sample of active learning application in science education: The thema "cell" with educational games
(ELSEVIER SCIENCE BV, 2012) Uzun, Naim; Baskan, GA; Ozdamli, F; Kanbul, S; Ozcan, D
In the present study, the purpose is to develop an application within the context of active learning methods and techniques by using educational games to teach the topic "cell" in elementary school science and technology course and evaluate its impacts on academic achievement. In the study, "Achievement Test" was used in line with pretest-posttest design to collect data. The control group consists of 72 sixth grade students and the experimental group consists of 121 sixth grade students, totally 193 students make up the study group. In the analysis of the data, Two-Way ANOVA for Mixed Measures test was employed. The analysis revealed a significant difference between the mean achievement score of the experimental group and that of the control group favoring the experimental group.
6(th) grade students' use of different strategies in solving ratio and proportion problems
(Elsevier, 2010) Avcu, Ramazan; Avcu, Seher; Keser, Hafize; Özçınar, Zehra; Kanbul, Sezer
The general purpose of this study was to determine the strategies used by sixth grade students in solving ratio and proportion problems. The research was carried out at three different elementary schools of Konya province in Turkey during 2009-2010 educational years. The study was conducted with 278 elementary school 6(th) grade students. In sample choice, random sampling method was used. General survey model was employed in order to determine students' solution strategies. In determining these strategies, an open ended test consisting of 8 items was developed by the researchers. Items were developed by following the objectives of renewed elementary mathematics curriculum. Students' answers were evaluated with rubrics which were developed for each item according to the strategies used. Data were analyzed by using descriptive analyses. The results revealed that students used six different solution strategies in solving ratio and proportion problems. In addition, they most frequently used cross multiplication algorithm strategy during the solution of these problems. (C) 2010 Published by Elsevier Ltd.
The comparision of the science and technology curriculum with the physics, chemistry and biology curriculums
(Elsevier Science Bv, 2010) Koçako?lu, Melih; Bakar, Elif; Keleş, Özgül; Uzunboylu, H
The purpose of this study is to examine whether the curriculums for primary and secondary education support each other in different aspects and to make some suggestions towards the study's records for more effective applications. The study is in survey method. In this study the comparision of the science and technology curriculums for primary education (for 4-8th class) and the physics, chemistry and biology curriculums of secondary education (for 9-11th class) was made in point of the curriculums' philosophy, vision and mission, structure (information and skill acquisitions), content of subjects, explanations, subdisciplines and the association of different lessons. At the end of the comparision of the curriculums it is found that they support each other.
The effect of PowerPoint presentations prepared and presented by prospective teachers on biology achievement and attitudes toward biology
(Elsevier Science Bv, 2010) Gürbüz, Hasan; Kışoğlu, Mustafa; Erkol, Mehmet; Alaş, Ali; Kahraman, Sakıp; Uzunboylu, H
The study aims to explore the effect of preparing and presenting powerpoint slides on prospective teachers' biology achievement and attitudes toward biology. The sample of the study was 109 freshman students from Pre-School Education Department at Ataturk University in Turkey. The sample was randomly assigned as control group consisted of 53 students and experimental group consisted of 56 students. The experimental group was taught by powerpoint presentations preparing and presenting by prospective teachers while the lesson was conducted through traditional approach in the control group. Results indicated that preparing and presenting powerpoint slides had a significant effect on prospective teachers biology achievement and attitudes towards biology. (c) 2010 Elsevier Ltd. All rights reserved.
The factors that affect the preservice mathematics teachers' self regulation strategies
(Elsevier, 2011) Özyıldırım, Feride; Alkaş, Çiğdem; Özdemir, Elif Yetkin; Akçamete, G; Uzunboylu, H; Oulmu, S; Karahoca, A; Babadoan, C; Özdamlı, F.; Kanbul, S.
The process whereby an individual regulates his/her own learning objectives, controls his/her own emotions and thoughts and develops strategies is described as self-regulation process (Zimmerman, 1990). Within this process the individual adapts to his/her environment and develops appropriate strategies. The purpose of this study is to determine pre-service elementary mathematics teachers' opinions regarding factors affecting their self-regulation strategies as they study courses related to mathematics education that have pedagogical contents. Within the scope of the study, semi-structured interviews were conducted with two pre-service teachers enrolled in the elementary mathematics education department in a large scale university in Ankara. Results revealed that the two pre-service teachers consider that the amount of time available for studying, the characteristics of the instructor (e.g., his/her attitude, his/her expectations from the students) and requirements of the course play important roles in determining what kinds of strategies they use when studying for the course. (c) 2011 Published by Elsevier Ltd. Open access under CC BY-NC-ND license.

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