Acta Crystallographica Section E Structure Reports Online, 2006
The title compound, C 18 H 10 N 2 O, is built up from two planar groups (naphthoxy and phthalonit... more The title compound, C 18 H 10 N 2 O, is built up from two planar groups (naphthoxy and phthalonitrile), with a dihedral angle of 66.14 (4) between them. The crystal structure is stabilized by weak C-HÁ Á ÁN and C-HÁ Á Á hydrogen-bond interactions. Comment Tetrasubstituted phthalocyanines are generally obtained from monosubstituted phthalonitriles, e.g. 4-(2-naphthoxy)phthalonitrile (McKeown, 1998). Phthalocyanines are of enormous technological importance for the manufacture of blue and green pigments. Other areas of current interest include applications in colours, catalysis, chemical sensors, electrochromism, batteries, photodynamic theraphy, semiconductive materials, liquid crystals and modified supports for gas-solid chromatography, as a result of newly synthesized compounds (Leznoff & Lever, 1989-1996). The title compound, (I), contains two cyclic groups, a naphthoxy and a phthalonitrile, bridged by an O atom. The phthalonitrile ring exhibits normal geometry and is planar, with a maximum deviation of 0.001 (1) Å for atom C4. The two cyano groups deviate from this plane by only 0.028 (3) and À0.053 (4) Å at atoms N1 and N2, respectively. The naphthoxy system is also planar, with a maximum deviation of 0.017 (2) Å for atom C9. The phthalonitrile and naphthyloxy groups make a dihedral angle of 66.14 (4). The C N bond lengths [N1 C1 = 1.141 (2) Å and N2 C2 = 1.142 (2) Å ] compare well with values reported in the literature [1.142 (5) Å in C 38 H 36 N 8 O 4 S 2 (Ç oruh et al., 2002), 1.141 (4) Å in C 17 H 13 BrN 2 O 3 (Ocak Ískeleli et al., 2005) and 1.148 (2) Å in C 8 H 4 F 3 N (Boitsov et al., 2002)]. As expected, The N CC angles [N1 C1-C8 = 178.8 (2) and N2 C2-C3 = 179.5 (3) ] are linear. The crystal structure of (I) is stabilized by weak intermolecular C-HÁ Á ÁN and C-HÁ Á Á ring-centroid hydrogenbond interactions (Table 1 and Fig. 2). Experimental 2-Naphthol (1.34 g, 9.30 mmol) and 4-nitrophthalonitrile (1.43 g, 8.26 mmol) were dissolved in dry dimethylformamide (35 ml). After
The objective of this study is to examine the effects of teaching the subject of seasons through ... more The objective of this study is to examine the effects of teaching the subject of seasons through physical models and virtual reality programs on the expressed models of pre-service teachers. For this purpose, 3 different physical models were developed and 3 different virtual reality programs were used. The study group consists of 100 pre-service science teachers. In this study, case study method was used as qualitative research methods. The data were obtained by using open-ended question form. The data were collected three times as pre-instruction, post-instruction and long time after instruction (permanence) and the content was analyzed by using content analysis technique. The analyses were conducted in two stages as question by question analysis and integrated analysis which assesses the answers given to all of the questions together. At the end of the analyses, both methods were found to be useful in the teaching of seasons. However, teaching by using physical models was found to...
A detailed study of VO 2+ in tetragonal mixed crystals Ca(HCOO) 2 -Sr(HCOO) 2 has been carried ou... more A detailed study of VO 2+ in tetragonal mixed crystals Ca(HCOO) 2 -Sr(HCOO) 2 has been carried out at room temperature. Impurity sites in the unit cell and the molecular structure of the vanadyl complexes in the crystal are discussed. The spin-Hamiltonian parameters have been calculated from single crystal as well as the powder spectra. The g and A tensors are found to be axially symmetric. Correlating the optical and EPR data the molecular orbital coefficients and crystal-field parameters are calculated and discussed.
ARI - An International Journal for Physical and Engineering Sciences, 1998
The electron paramagnetic resonance spectra of VO> doped dibarium zinc formate tetrahydrate singl... more The electron paramagnetic resonance spectra of VO> doped dibarium zinc formate tetrahydrate single crystals and powders were investigated at room temperature. The angular variations of the spectra indicated that the VO> enters Ba> and Zn> sites in their respective host crystals. The spin-Hamiltonian parameters were determined at room temperature. The g and A tensors were found to be axially symmetric for the powder sample (g , "1.
The purpose of this study is to develop a valid and reliable attitude scale to find out middle sc... more The purpose of this study is to develop a valid and reliable attitude scale to find out middle school students’ attitudes towards astronomy, subjects related to astronomy, the relationship between astronomy and daily life and also their attitudes towards the studies conducted. In the development stage of the scale, after existing attitude scales and studies on astronomy education were reviewed, initial items were prepared and expert views were consulted. Astronomy Attitude Scale (AAS), which was 5 point Likert, was conducted on a total of 302 middle school students studying in the Black Sea Region of Turkey. The scale was finalized through exploratory factor analysis and the scale’s Cronbach-Alpha consistency coefficient was found to be 0,912. As a result of the analyses conducted, it was found that the scale
Bu calismada astronomi ogretiminde yaygin olarak kullanilan sanal gerceklik programlariyla ogreti... more Bu calismada astronomi ogretiminde yaygin olarak kullanilan sanal gerceklik programlariyla ogretim (SGO) ile fiziksel [1] modellerle ogretim (FMO) yontemlerinin etkililigi deneysel olarak karsilastirilmistir. Calisma gercek deneme modellerinden yari-deneysel yapida olup , Turkiye’nin Karadeniz Bolgesinde bir universitenin egitim fakultesinde ogrenim gormekte olan 106 Fen Bilimleri ogretmen adayiyla gerceklestirilmistir. Veri toplama araci olarak arastirmacilar tarafindan daha once gelistirilmis olan Astronomi Basari Testi (ABT) kullanilmistir. FMO ve SGO gruplarinin kendi icinde ABT puanlarinin olcumlere gore anlamli sekilde degisip degismedigini belirlemek icin parametrik analiz tekniklerinden bagimsiz gruplar icin tek faktorlu varyans analizi (One-Way Anova) teknigi kullanilirken, FMO ve SGO gruplari arasi karsilastirmalar icin tekrarli olcumler icin karisik desenli ANOVA teknigi kullanilmistir. Veri analizi sonucunda her iki grupta da uygulanan yontemin ogretmen adaylarinin astro...
Even though the educational researchers have developed and implemented various educational strate... more Even though the educational researchers have developed and implemented various educational strategies to teach the concepts of the phases of the Moon and the formation of the lunar eclipse more effectively, many studies conducted by them in recent years reveal that the teachers still do not understand the causes and scientific processes related to the phases of the Moon phases and lunar eclipse. In addition, this situation shows that there are deep problems in teaching the subjects of Moon phases and lunar eclipse to students. Examining the main causes of learning difficulties in the phases of the Moon and lunar eclipse, this study is designed on the basis of development and implementation of a project supported by STRCT (The Scientific and Technological Research Council of Turkey) in order to discuss the possible solutions. A 5-day activity program including basic astronomy education was applied to science teachers by using the model developed within the scope of the project, and t...
The purpose of this study is to develop a valid and reliable attitude scale to find out middle sc... more The purpose of this study is to develop a valid and reliable attitude scale to find out middle school students’ attitudes towards astronomy, subjects related to astronomy, the relationship between astronomy and daily life and also their attitudes towards the studies conducted. In the development stage of the scale, after existing attitude scales and studies on astronomy education were reviewed, initial items were prepared and expert views were consulted. Astronomy Attitude Scale (AAS), which was 5 point Likert, was conducted on a total of 302 middle school students studying in the Black Sea Region of Turkey. The scale was finalized through exploratory factor analysis and the scale’s Cronbach-Alpha consistency coefficient was found to be 0,912. As a result of the analyses conducted, it was found that the scale which consisted of a total of 27 items -17 positive and 10 negative- had five sub-factors and the factor load values of the items in these factors differed between 0.533 and 0....
Electron Paramagnetic Resonance spectra of Cu doped into cadmium barium formate dihydrate single ... more Electron Paramagnetic Resonance spectra of Cu doped into cadmium barium formate dihydrate single crystal were studied at 300 K. The powder spectrum of this material was studied at 300 to 133 K. The values of the g and A hyperfine tensors were found to be temperature dependent. The temperature dependence of the Cu + EPR spectrum is discussed in terms of the dynamic Jahn-Teller effect. The angular variation of the spectra indicates the substitution of the host Cd + with Cu + . The spectra were fitted with a tetragonal spin-Hamiltonian, the parameters of which were determined at 300 K. The ground-state wave function of the copper complex has been constructed at 113 K and 300 K.
Bu calismanin amaci universite ogrencilerinin astronomiye yonelik tutumlarini tespit etmek amaciy... more Bu calismanin amaci universite ogrencilerinin astronomiye yonelik tutumlarini tespit etmek amaciyla gecerli ve guvenilir bir tutum olcegi gelistirip, bu olcek yardimiyla Fen Bilimleri ogretmen adaylarinin astronomiye yonelik tutumlarini belirlemektir. Literaturde daha once ortaokul ogrencileri icin hazirlanmis bir Astronomi Tutum Olcegi (ATO), bu calismayla yuksekogretime uyarlanmistir. Bu kapsamda hazir olcekte yer alan ve yuksekogretim icin uygun olmayan bazi maddeler cikarilmis, bazilari ise yeniden duzenlenmistir. 5’li likert tipinde ve 20 maddeden olusan taslak ATO, 2014-2015 egitim-ogretim doneminde 286 ogretmen adayina uygulanarak, Acimlayici Faktor Analizi (AFA) yapilmistir. Bu analiz sonucunda olcekte kalan 18 maddenin 4 faktorde toplandigi ve Cronbach-Alfa ic tutarlik katsayisinin 0,898 oldugu tespit edilmistir. ATO’nun Dogrulayici Faktor Analizini (DFA) yapmak icin 2015-2016 egitim-ogretim yilinda 223 ogretmen adayiyla calisilmistir. DFA sonrasi hem faktorler icin hem de ...
Department of Elementary Education, Educational Faculty, Ondokuz Mayıs University, 55200 Atakum-S... more Department of Elementary Education, Educational Faculty, Ondokuz Mayıs University, 55200 Atakum-Samsun, Turkey, Anatolian Trade High School, Teacher of Physics, Merzifon 05300, Amasya, Turkey, Department of Chemistry, Faculty of Arts and Sciences, Karadeniz Teknik University, 61080 Trabzon, Turkey, and Departamento de Quı́mica Inorgánica, Facultade de Ciencias-Quı́mica, Universidade de Vigo, 36200-Vigo, Galicia, Spain
In this study, it was aimed to determine the opinions of the students on the teaching astronomy w... more In this study, it was aimed to determine the opinions of the students on the teaching astronomy with models (TAM) by teaching the astronomy concepts in the "Solar System and Beyond" unit of the Science curriculum with hands-on models. Six different "hands-on" models have been developed in this direction. The study group of the study constitutes a total of 40 middle school seventh grade students who are studying in one of the state schools affiliated to the Ministry of National Education in Samsun province. In the study, case study method was used among qualitative research methods. The data of the study were gathered using the Teaching Astronomy with Models Assessment Form (TAMAF) and analyzed using the content analysis technique. As a result of the analysis, students stated that they think that they comprehend the subjects easier and better by using "hands-on" models and therefore make the learning permanent. Besides, the visuality of the models are liked by the students and also the lessons thought with the models are observed to be entertaining and enjoyable. Finally, it was determined that the most favourite models of students are constellations and eclipses. Based on these results, it is proposed to extend and popularize the teaching using the "hands-on" 1 This study based on the Ph.D. thesis of Cumhur TÜRK. 2 This study was presented as an oral presentation at International Conference on Multidisciplinary Sciences.
The purpose of this study is to determine the mental models of elementary school students on seas... more The purpose of this study is to determine the mental models of elementary school students on seasons and to analyze how these models change in terms of grade levels. The study was conducted with 294 students (5 th , 6 th , 7 th and 8 th graders) studying in an elementary school of Turkey's Black Sea Region. Qualitative and quantitative data collection methods were used in the study. The students first were asked 3 open ended questions (one of them was a drawing) in order to determine their mental models on seasons. Following this, the students took an achievement test on seasons that consisted of 4 multiple questions. Quantitative data were analyzed by SPSS 20.0 while the qualitative data were analyzed by the researchers by using content analysis technique. The results of the study showed that the students construct the formation of seasons in various ways in their minds. However, differently from the literature, the presence of some new mental models was found. For a full understanding of the seasons, the necessity of a set of pre-learnings has been recommended. It will be useful to design basic activities based on hands-on and learning by doing which will enable the most effective learning and to put this in the textbooks in the most suitable way. Additionally tangible physical-scale hands-on models, 3D simulation modeling and planetarium environment should be used in students' education about formation of seasons.
The aim of this study is to determine the changes in the knowledge of pre-service Primary and Sci... more The aim of this study is to determine the changes in the knowledge of pre-service Primary and Science teachers related to basic astronomy concepts occurring after four years of undergraduate study in education and the extent of and reasons for these changes. For this purpose, a "Basic Astronomy Test" involving 14 questions was administered to the pre-service Primary and Science teachers by education faculty members in the Black Sea Region of Turkey in the first (2009) and fourth (2013) years of their educations. In the data analysis, nonparametric Mann-Whitney U tests and Wilcoxon signed ranks tests were used to
ARI - An International Journal for Physical and Engineering Sciences, 1998
Gamma-irradiation damage centres in [(CH) NH] CdCl single crystals have been investigated at room... more Gamma-irradiation damage centres in [(CH) NH] CdCl single crystals have been investigated at room and liquid nitrogen temperatures by electron paramagnetic resonance (EPR) technique. It has been found that the gamma irradiation produces (CH) N> radical with A&"28.5, A, VV "28.6, A, WW "8.4, A, XX "15.1 G and g VV "2.0043, g WW "2.0065, g XX "2.0054 EPR parameters in the sample. The behaviour of the radical movement in the [(CH) NH] CdCl matrix is discussed in terms of the parameters obtained by analysing the data. No significant changes are observed in the EPR spectra in the temperature range from room to liquid nitrogen.
ARI - An International Journal for Physical and Engineering Sciences, 1998
Defects generated in single crystals of RbClO by gamma irradiation at room temperature have been ... more Defects generated in single crystals of RbClO by gamma irradiation at room temperature have been studied using the electron paramagnetic resonance (EPR) technique. The defects are assigned as ClO , ClO and O\. Hyperfine coupling constants and g-values have been determined and discussed by comparing the results with previous studies of X-or gamma-irradiated earth alkali chlorates and perchlorates. It has been found that there are two chemically identical but magnetically distinguishable sites for ClO and ClO , whereas only a single site is observed for O\. It should also be added that all the signals decrease by heating and by UV light treatment.
The X-band EPR spectra of Cu doped into cadmium formate dihydrate single crystal was studied at 1... more The X-band EPR spectra of Cu doped into cadmium formate dihydrate single crystal was studied at 113 °K. The powder spectrum of the same material was studied over the temperature range from 113 to 300 °K The observed values of the g and A hyperfine coupling constants and linewidths were found to be temperature dependent.The temperature dependence of Cu EPR
Acta Crystallographica Section E Structure Reports Online, 2006
The title compound, C 18 H 10 N 2 O, is built up from two planar groups (naphthoxy and phthalonit... more The title compound, C 18 H 10 N 2 O, is built up from two planar groups (naphthoxy and phthalonitrile), with a dihedral angle of 66.14 (4) between them. The crystal structure is stabilized by weak C-HÁ Á ÁN and C-HÁ Á Á hydrogen-bond interactions. Comment Tetrasubstituted phthalocyanines are generally obtained from monosubstituted phthalonitriles, e.g. 4-(2-naphthoxy)phthalonitrile (McKeown, 1998). Phthalocyanines are of enormous technological importance for the manufacture of blue and green pigments. Other areas of current interest include applications in colours, catalysis, chemical sensors, electrochromism, batteries, photodynamic theraphy, semiconductive materials, liquid crystals and modified supports for gas-solid chromatography, as a result of newly synthesized compounds (Leznoff & Lever, 1989-1996). The title compound, (I), contains two cyclic groups, a naphthoxy and a phthalonitrile, bridged by an O atom. The phthalonitrile ring exhibits normal geometry and is planar, with a maximum deviation of 0.001 (1) Å for atom C4. The two cyano groups deviate from this plane by only 0.028 (3) and À0.053 (4) Å at atoms N1 and N2, respectively. The naphthoxy system is also planar, with a maximum deviation of 0.017 (2) Å for atom C9. The phthalonitrile and naphthyloxy groups make a dihedral angle of 66.14 (4). The C N bond lengths [N1 C1 = 1.141 (2) Å and N2 C2 = 1.142 (2) Å ] compare well with values reported in the literature [1.142 (5) Å in C 38 H 36 N 8 O 4 S 2 (Ç oruh et al., 2002), 1.141 (4) Å in C 17 H 13 BrN 2 O 3 (Ocak Ískeleli et al., 2005) and 1.148 (2) Å in C 8 H 4 F 3 N (Boitsov et al., 2002)]. As expected, The N CC angles [N1 C1-C8 = 178.8 (2) and N2 C2-C3 = 179.5 (3) ] are linear. The crystal structure of (I) is stabilized by weak intermolecular C-HÁ Á ÁN and C-HÁ Á Á ring-centroid hydrogenbond interactions (Table 1 and Fig. 2). Experimental 2-Naphthol (1.34 g, 9.30 mmol) and 4-nitrophthalonitrile (1.43 g, 8.26 mmol) were dissolved in dry dimethylformamide (35 ml). After
The objective of this study is to examine the effects of teaching the subject of seasons through ... more The objective of this study is to examine the effects of teaching the subject of seasons through physical models and virtual reality programs on the expressed models of pre-service teachers. For this purpose, 3 different physical models were developed and 3 different virtual reality programs were used. The study group consists of 100 pre-service science teachers. In this study, case study method was used as qualitative research methods. The data were obtained by using open-ended question form. The data were collected three times as pre-instruction, post-instruction and long time after instruction (permanence) and the content was analyzed by using content analysis technique. The analyses were conducted in two stages as question by question analysis and integrated analysis which assesses the answers given to all of the questions together. At the end of the analyses, both methods were found to be useful in the teaching of seasons. However, teaching by using physical models was found to...
A detailed study of VO 2+ in tetragonal mixed crystals Ca(HCOO) 2 -Sr(HCOO) 2 has been carried ou... more A detailed study of VO 2+ in tetragonal mixed crystals Ca(HCOO) 2 -Sr(HCOO) 2 has been carried out at room temperature. Impurity sites in the unit cell and the molecular structure of the vanadyl complexes in the crystal are discussed. The spin-Hamiltonian parameters have been calculated from single crystal as well as the powder spectra. The g and A tensors are found to be axially symmetric. Correlating the optical and EPR data the molecular orbital coefficients and crystal-field parameters are calculated and discussed.
ARI - An International Journal for Physical and Engineering Sciences, 1998
The electron paramagnetic resonance spectra of VO> doped dibarium zinc formate tetrahydrate singl... more The electron paramagnetic resonance spectra of VO> doped dibarium zinc formate tetrahydrate single crystals and powders were investigated at room temperature. The angular variations of the spectra indicated that the VO> enters Ba> and Zn> sites in their respective host crystals. The spin-Hamiltonian parameters were determined at room temperature. The g and A tensors were found to be axially symmetric for the powder sample (g , "1.
The purpose of this study is to develop a valid and reliable attitude scale to find out middle sc... more The purpose of this study is to develop a valid and reliable attitude scale to find out middle school students’ attitudes towards astronomy, subjects related to astronomy, the relationship between astronomy and daily life and also their attitudes towards the studies conducted. In the development stage of the scale, after existing attitude scales and studies on astronomy education were reviewed, initial items were prepared and expert views were consulted. Astronomy Attitude Scale (AAS), which was 5 point Likert, was conducted on a total of 302 middle school students studying in the Black Sea Region of Turkey. The scale was finalized through exploratory factor analysis and the scale’s Cronbach-Alpha consistency coefficient was found to be 0,912. As a result of the analyses conducted, it was found that the scale
Bu calismada astronomi ogretiminde yaygin olarak kullanilan sanal gerceklik programlariyla ogreti... more Bu calismada astronomi ogretiminde yaygin olarak kullanilan sanal gerceklik programlariyla ogretim (SGO) ile fiziksel [1] modellerle ogretim (FMO) yontemlerinin etkililigi deneysel olarak karsilastirilmistir. Calisma gercek deneme modellerinden yari-deneysel yapida olup , Turkiye’nin Karadeniz Bolgesinde bir universitenin egitim fakultesinde ogrenim gormekte olan 106 Fen Bilimleri ogretmen adayiyla gerceklestirilmistir. Veri toplama araci olarak arastirmacilar tarafindan daha once gelistirilmis olan Astronomi Basari Testi (ABT) kullanilmistir. FMO ve SGO gruplarinin kendi icinde ABT puanlarinin olcumlere gore anlamli sekilde degisip degismedigini belirlemek icin parametrik analiz tekniklerinden bagimsiz gruplar icin tek faktorlu varyans analizi (One-Way Anova) teknigi kullanilirken, FMO ve SGO gruplari arasi karsilastirmalar icin tekrarli olcumler icin karisik desenli ANOVA teknigi kullanilmistir. Veri analizi sonucunda her iki grupta da uygulanan yontemin ogretmen adaylarinin astro...
Even though the educational researchers have developed and implemented various educational strate... more Even though the educational researchers have developed and implemented various educational strategies to teach the concepts of the phases of the Moon and the formation of the lunar eclipse more effectively, many studies conducted by them in recent years reveal that the teachers still do not understand the causes and scientific processes related to the phases of the Moon phases and lunar eclipse. In addition, this situation shows that there are deep problems in teaching the subjects of Moon phases and lunar eclipse to students. Examining the main causes of learning difficulties in the phases of the Moon and lunar eclipse, this study is designed on the basis of development and implementation of a project supported by STRCT (The Scientific and Technological Research Council of Turkey) in order to discuss the possible solutions. A 5-day activity program including basic astronomy education was applied to science teachers by using the model developed within the scope of the project, and t...
The purpose of this study is to develop a valid and reliable attitude scale to find out middle sc... more The purpose of this study is to develop a valid and reliable attitude scale to find out middle school students’ attitudes towards astronomy, subjects related to astronomy, the relationship between astronomy and daily life and also their attitudes towards the studies conducted. In the development stage of the scale, after existing attitude scales and studies on astronomy education were reviewed, initial items were prepared and expert views were consulted. Astronomy Attitude Scale (AAS), which was 5 point Likert, was conducted on a total of 302 middle school students studying in the Black Sea Region of Turkey. The scale was finalized through exploratory factor analysis and the scale’s Cronbach-Alpha consistency coefficient was found to be 0,912. As a result of the analyses conducted, it was found that the scale which consisted of a total of 27 items -17 positive and 10 negative- had five sub-factors and the factor load values of the items in these factors differed between 0.533 and 0....
Electron Paramagnetic Resonance spectra of Cu doped into cadmium barium formate dihydrate single ... more Electron Paramagnetic Resonance spectra of Cu doped into cadmium barium formate dihydrate single crystal were studied at 300 K. The powder spectrum of this material was studied at 300 to 133 K. The values of the g and A hyperfine tensors were found to be temperature dependent. The temperature dependence of the Cu + EPR spectrum is discussed in terms of the dynamic Jahn-Teller effect. The angular variation of the spectra indicates the substitution of the host Cd + with Cu + . The spectra were fitted with a tetragonal spin-Hamiltonian, the parameters of which were determined at 300 K. The ground-state wave function of the copper complex has been constructed at 113 K and 300 K.
Bu calismanin amaci universite ogrencilerinin astronomiye yonelik tutumlarini tespit etmek amaciy... more Bu calismanin amaci universite ogrencilerinin astronomiye yonelik tutumlarini tespit etmek amaciyla gecerli ve guvenilir bir tutum olcegi gelistirip, bu olcek yardimiyla Fen Bilimleri ogretmen adaylarinin astronomiye yonelik tutumlarini belirlemektir. Literaturde daha once ortaokul ogrencileri icin hazirlanmis bir Astronomi Tutum Olcegi (ATO), bu calismayla yuksekogretime uyarlanmistir. Bu kapsamda hazir olcekte yer alan ve yuksekogretim icin uygun olmayan bazi maddeler cikarilmis, bazilari ise yeniden duzenlenmistir. 5’li likert tipinde ve 20 maddeden olusan taslak ATO, 2014-2015 egitim-ogretim doneminde 286 ogretmen adayina uygulanarak, Acimlayici Faktor Analizi (AFA) yapilmistir. Bu analiz sonucunda olcekte kalan 18 maddenin 4 faktorde toplandigi ve Cronbach-Alfa ic tutarlik katsayisinin 0,898 oldugu tespit edilmistir. ATO’nun Dogrulayici Faktor Analizini (DFA) yapmak icin 2015-2016 egitim-ogretim yilinda 223 ogretmen adayiyla calisilmistir. DFA sonrasi hem faktorler icin hem de ...
Department of Elementary Education, Educational Faculty, Ondokuz Mayıs University, 55200 Atakum-S... more Department of Elementary Education, Educational Faculty, Ondokuz Mayıs University, 55200 Atakum-Samsun, Turkey, Anatolian Trade High School, Teacher of Physics, Merzifon 05300, Amasya, Turkey, Department of Chemistry, Faculty of Arts and Sciences, Karadeniz Teknik University, 61080 Trabzon, Turkey, and Departamento de Quı́mica Inorgánica, Facultade de Ciencias-Quı́mica, Universidade de Vigo, 36200-Vigo, Galicia, Spain
In this study, it was aimed to determine the opinions of the students on the teaching astronomy w... more In this study, it was aimed to determine the opinions of the students on the teaching astronomy with models (TAM) by teaching the astronomy concepts in the "Solar System and Beyond" unit of the Science curriculum with hands-on models. Six different "hands-on" models have been developed in this direction. The study group of the study constitutes a total of 40 middle school seventh grade students who are studying in one of the state schools affiliated to the Ministry of National Education in Samsun province. In the study, case study method was used among qualitative research methods. The data of the study were gathered using the Teaching Astronomy with Models Assessment Form (TAMAF) and analyzed using the content analysis technique. As a result of the analysis, students stated that they think that they comprehend the subjects easier and better by using "hands-on" models and therefore make the learning permanent. Besides, the visuality of the models are liked by the students and also the lessons thought with the models are observed to be entertaining and enjoyable. Finally, it was determined that the most favourite models of students are constellations and eclipses. Based on these results, it is proposed to extend and popularize the teaching using the "hands-on" 1 This study based on the Ph.D. thesis of Cumhur TÜRK. 2 This study was presented as an oral presentation at International Conference on Multidisciplinary Sciences.
The purpose of this study is to determine the mental models of elementary school students on seas... more The purpose of this study is to determine the mental models of elementary school students on seasons and to analyze how these models change in terms of grade levels. The study was conducted with 294 students (5 th , 6 th , 7 th and 8 th graders) studying in an elementary school of Turkey's Black Sea Region. Qualitative and quantitative data collection methods were used in the study. The students first were asked 3 open ended questions (one of them was a drawing) in order to determine their mental models on seasons. Following this, the students took an achievement test on seasons that consisted of 4 multiple questions. Quantitative data were analyzed by SPSS 20.0 while the qualitative data were analyzed by the researchers by using content analysis technique. The results of the study showed that the students construct the formation of seasons in various ways in their minds. However, differently from the literature, the presence of some new mental models was found. For a full understanding of the seasons, the necessity of a set of pre-learnings has been recommended. It will be useful to design basic activities based on hands-on and learning by doing which will enable the most effective learning and to put this in the textbooks in the most suitable way. Additionally tangible physical-scale hands-on models, 3D simulation modeling and planetarium environment should be used in students' education about formation of seasons.
The aim of this study is to determine the changes in the knowledge of pre-service Primary and Sci... more The aim of this study is to determine the changes in the knowledge of pre-service Primary and Science teachers related to basic astronomy concepts occurring after four years of undergraduate study in education and the extent of and reasons for these changes. For this purpose, a "Basic Astronomy Test" involving 14 questions was administered to the pre-service Primary and Science teachers by education faculty members in the Black Sea Region of Turkey in the first (2009) and fourth (2013) years of their educations. In the data analysis, nonparametric Mann-Whitney U tests and Wilcoxon signed ranks tests were used to
ARI - An International Journal for Physical and Engineering Sciences, 1998
Gamma-irradiation damage centres in [(CH) NH] CdCl single crystals have been investigated at room... more Gamma-irradiation damage centres in [(CH) NH] CdCl single crystals have been investigated at room and liquid nitrogen temperatures by electron paramagnetic resonance (EPR) technique. It has been found that the gamma irradiation produces (CH) N> radical with A&"28.5, A, VV "28.6, A, WW "8.4, A, XX "15.1 G and g VV "2.0043, g WW "2.0065, g XX "2.0054 EPR parameters in the sample. The behaviour of the radical movement in the [(CH) NH] CdCl matrix is discussed in terms of the parameters obtained by analysing the data. No significant changes are observed in the EPR spectra in the temperature range from room to liquid nitrogen.
ARI - An International Journal for Physical and Engineering Sciences, 1998
Defects generated in single crystals of RbClO by gamma irradiation at room temperature have been ... more Defects generated in single crystals of RbClO by gamma irradiation at room temperature have been studied using the electron paramagnetic resonance (EPR) technique. The defects are assigned as ClO , ClO and O\. Hyperfine coupling constants and g-values have been determined and discussed by comparing the results with previous studies of X-or gamma-irradiated earth alkali chlorates and perchlorates. It has been found that there are two chemically identical but magnetically distinguishable sites for ClO and ClO , whereas only a single site is observed for O\. It should also be added that all the signals decrease by heating and by UV light treatment.
The X-band EPR spectra of Cu doped into cadmium formate dihydrate single crystal was studied at 1... more The X-band EPR spectra of Cu doped into cadmium formate dihydrate single crystal was studied at 113 °K. The powder spectrum of the same material was studied over the temperature range from 113 to 300 °K The observed values of the g and A hyperfine coupling constants and linewidths were found to be temperature dependent.The temperature dependence of Cu EPR
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