Matematik ve Fen Bilimleri Eğitimi Bölümü Koleksiyonu

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https://hdl.handle.net/20.500.12428/2402

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Quark and strange quark matter in f(R) gravity for Bianchi type I and V space-times
(Springer/Plenum Publishers, 2012) Yılmaz, İhsan; Baysal, Hüsnü; Aktaş, Can
Behaviors of quark matter and strange quark matter which exist in the first seconds of the early Universe in f(R) gravity are studied for Bianchi I and V universes. In this respect, we obtain exact solutions of the modified Einstein field equations by using anisotropy feature of Bianchi I and V space-times. In particular, we investigate exact f(R) functions for Bianchi I as the contribution of strange quark and quark matter. Also, we have concluded that quark matter may contribute to the early acceleration of the universe since quark matter behaves like phantom-type dark energy. Furthermore, obtained f(R) solutions represents early eras of the Universe since f(R) solutions for quark matter coincide with f(R) equations for inflation. From this point, we can reach the conclusion that quarks may be source of the early dark energy of the universe or source of little inflation due to their repulsive force.
Domain wall solutions with quark matter in higher dimensional space-times
(Amer Inst Physics, 2007) Aktaş, Can; Yılmaz, İhsan; Baysal, Hüsnü; Aygün, Melis; Demirel, Canan
In this paper, we have examined quark matter in the perfect form attached to domain walls in the higher dimensional spherical symmetric space-time admitting one-parameter group of conformal motions. For this purpose, we have solved Einstein's field equations for higher dimensional spherical symmetric space-time via conformal motions. Also, we have discussed the features of the obtained solutions.
Meslek Bilgisi Derslerinin Öğretmen Adaylarının Profesyonel Gelişimindeki Önemi
(Pamukkale Üniversitesi, 2010) Şahin Taşkın, Çiğdem; Hacıömeroğlu, Güney
Bu araştırma öğretmen adaylarının meslek bilgisi dersleri üzerine bakış açılarını ortaya koymayı amaçlamaktadır. Araştırmaya Marmara bölgesinde yer alan bir üniversitenin, Eğitim Fakültesi, İlköğretim Bölümü Sınıf Öğretmenliği ve Okul Öncesi Öğretmenliği A.B.D. son sınıfında öğrenim gören toplam 72 öğretmen adayı katılmıştır. Bu çalışmada, veriler nitel araştırma yöntemlerinden açık uçlu soru tekniği kullanılarak toplanmıştır. Elde edilen bulgular, Sınıf Öğretmenliği öğretmen adaylarından 38inin, Okul Öncesi öğretmenliği öğretmen adaylarından ise 20sinin meslek bilgisi derslerinin öğretmenlik mesleğine bakış açılarını olumlu yönde etkilediğini ifade ettiklerini göstermektedir. Bununla beraber, bazı öğretmen adayları bu dersleri yeterli bulmadıklarını, bazıları ise derslerin mesleğe bakış açılarını değiştirmediğini belirtmiştir.
A Kinetic Evaluation for PANSA Doped Low Density Polyethylene Blends
(2019) Doğan, Fatih; Bilici, Ali; Kaya, İsmet; Şirin, Mehtap
In our previous study, we prepared blends of lowdensity polyethylene (LDPE) with semiconductorpolymer, poly (1-amino-2-hydroxynaphthalene-4-sulfonic acid) (PANSA), in different mixing ratios. Inthat study, the findings on some physical and chemical properties of the blends prepared were alsopresented. In this study, it was aimed to investigate the thermal decomposition kinetics of these preparedblends. For this purpose, thermograms of PANSA doped LDPE blends at four different heating rates wereobtained. With the addition of PANSA into LDPE, it was observed that the initial decompositiontemperature and maximum decomposition temperature of LDPE increased. Thermal decompositionkinetics of blends were performed using the integral isoconversional methods (Kissinger, Kim-Park (KP),Tang, Kissenger-Akahira-Sunose (KAS) and Flynn-Wall-Ozawa (FWO)) in addition to differentialisoconversional method (Friedman method). The activation energy values calculated by Kissinger, KP,Tang, KAS, FWO and Friedman methods and found to be 187.9, 200.2, 171.90, 171.78, 171.70 and171.89 kJ mol-1for 0.5 % PANSA doped LDPE, 193.9, 206.2, 173.31, 172.87, 172.98 and 172.78 kJmol-1for 1 % PANSA doped LDPE and 207.0, 219.2, 196.94, 197.09, 198.08 and 208.10 kJ mol-1for 0.5% PANSA doped LDPE, respectively. Thermal decomposition mechanism for blends was proposed withthe help of master plot curves.
The Effects of Blog-Based Learning on Pre-service Science Teachers' Internet Self-efficacy and Understanding of Atmosphere-Related Environmental Issues
(Springer Science and Business Media Deutschland GmbH, 2021) Kahraman, Sakıp
The aim of the study was to investigate the effects of blog-based learning (BBL) on pre-service science teachers’ Internet self-efficacy and understanding of atmosphere-related environmental problems (AREPs). The working group of the study consisted of 89 pre-service science teachers. The participants were divided into groups, and each group was asked to perform the following activities in sequence: (1) accessing scientific documents (e.g. articles, books) and reading them individually, (2) coming together in groups to discuss the scientific knowledge extracted by each group member and preparing a presentation about the issue discussed, (3) sharing findings and engaging groups in a discussion of issues, and (4) developing a blog using the knowledge from the discussions within and between groups. In this study, single-group pretest-posttest experimental design was used. To collect data, the Internet Self-efficacy Scale (ISS), the Atmosphere-related Environmental Problems Diagnostic Test (AREPDiT), and the Opinion Questionnaire about Blogging (OQaB) were used. The results revealed that the subjects’ ISS and AREPDiT post-test mean scores were significantly higher than their pre-test mean scores and that their misconceptions about AREPs were substantially eliminated by the intervention. The subjects’ responses to the blog use were generally positive.
Electrocatalytic oxidation and flow injection analysis of formaldehyde at binary metal oxides (Co3O4-NiO and CuO-Co3O4) modified pencil graphite electrodes
(Springer, 2021) Emir, Gamze; Karakaya, Serkan; Ayaz, Selen; Dilgin, Didem Giray; Dilgin, Yusuf
In this work, a highly efficient performance of bimetallic thin films as their oxide forms (Co3O4-NiO and CuO-Co3O4) modified on pencil graphite electrodes (PGEs) was presented for electrocatalytic oxidation of formaldehyde. In addition, a sensitive and selective amperometric determination of formaldehyde in flow injection analysis system have been first performed using binary transition metal oxides modified PGEs. Co3O4-NiO and CuO-Co3O4 films were electrochemically deposited on the PGE surface using cyclic voltammetric procedures. The recorded cyclic voltammograms in the presence of formaldehyde in 0.10 M NaOH containing 0.10 M KCl showed that the prepared binary transition metal oxides modified PGEs exhibited a higher electrocatalytic activity than single metal oxide thin films modified PGEs towards oxidation of formaldehyde. The linear responses based on electrocatalytic oxidation of formaldehyde were determined as 2.5-5000 mu M and 0.25-1000 mu M for Co3O4-NiO/PGE and CuO-Co3O4/PGE, respectively. Moreover, limit of detections and sensitivities were estimated as 0.73 mu M and 81.8 mu A mM(-1) cm(-2) and 0.09 mu M and 166 mu A mM(-1) cm(-2) for Co3O4-NiO/PGE and CuO-Co3O4/PGE, respectively. The results from real sample studies proved that the fabricated FI-amperometric sensors enable high applicability towards determination of formaldehyde in real water samples.
Anti-bacterial, anti-oxidant activities of polymer-based metal complexes and their catalyst effects in presence of H2O2
(Springer Science and Business Media Deutschland GmbH, 2024) Şenol Bahçeci, Dilek; Aydın Kocaeren, Aysel; Demir, Neslihan; Dalgıç, Büşra
4-{[(3-Hydroxynaphthalen-2-yl)imino]methyl}benzene-1,2,3-triol Schiff-base, abbreviated as ligand (L), was synthesized and additionally, its polymer was obtained through oxidative polycondensation and named as poly-4-{[(3-hydroxynaphthalen-2-yl)imino]methyl}benzene-1,2,3-triolpoly-ligand (PL). The ammonium persulfate (NH4)2S(2)O(8) was used as an oxidant in this reaction. The metal complexes of PL were synthesized in the presence of various metal ions such as Cu2+, Hg2+, Ni2+, Pb2+,and Zn2+. The synthesized structures of PL and metal complexes were confirmed by FTIR, UV-vis, H-1 and C-13 NMR, and elemental analysis. Moreover, SEM and TGA analyses were performed for characterization. In this study, the anti-oxidant, anti-bacterial and catalytic properties of PL and its metal complexes were investigated. For anti-oxidant properties, 2,2-diphenyl-1-picryl-hydrazyl (DPPH) detection methods were studied. Also, for anti-bacterial activities they were tested against various bacteria using the minimum inhibitory concentration (MIC) method. It was observed that [Ni(PL)(2)] and [Pb(PL)(2)] metal complexes showed quite good anti-oxidant activities when they were compared with PL at its highest concentration of 100 ppm. The anti-bacterial activity results showed that [Hg(PL)(2)] had the highest MIC value of all the mentioned materials. The obtained catalytic activity results revealed that the synthesized poly-ligand metal [M(PL)(2)] complexes could be considered as an alternative catalyst to remove various organic pollutants from the aqueous environment. From this point of view, it is possible to say that [M(PL)(2)] complexes synthesized within the scope of the study could be used as polymeric agents to reduce environmental pollution.
Simple, sensitive, and cost-effective voltammetric determination of salbutamol at a pencil graphite electrode modified with Nafion and functionalized multi-walled carbon nanotubes
(Springer, 2024) Dilgin, Didem Giray; Vural, Kader; Karakaya, Serkan; Dilgin, Yusuf
This study describes a simple, highly sensitive, and cost-effective electrochemical determination of salbutamol (SBT) at a disposable pencil graphite electrode modified with Nafion/functionalized multi-walled carbon nanotubes composite material (Nf/f-MWCNTs/PGE). The electrochemical response of SBT at this modified electrode was investigated by both differential pulse voltammetry (DPV) and cyclic voltammetry techniques. The voltammetric measurements confirmed that the combination of f-MWCNTs with Nafion shows remarkable electrocatalytic activity on the oxidation of SBT due to a synergistic effect of Nafion via electrostatic interaction and f-MWCNTs via excellent conductivity and large specific surface area. Differential pulse voltammetry results show that the composite electrode gives two linear ranges of 0.10-17.5 mu M and 17.5-100 mu M with a detection limit (LOD) of 0.027 mu M SBT. Moreover, the studies of some potential interferants show that there is no significant interference in the determination of SBT. The proposed procedure was successfully applied to determine SBT in tube- and syrup-type pharmaceutical formulations, animal feed, and beef meat samples, and acceptable results were obtained with high accuracy and precision. Moreover, the proposed sensor displays good intra-day and inter-day precisions for the voltammetric determination of SBT.
Voltammetric Determination of Favipiravir Used as an Antiviral Drug for the Treatment of Covid-19 at Pencil Graphite Electrode
(John Wiley and Sons Inc, 2023) Erşan, Teslime; Dilgin, Didem Giray; Kumrulu, Elif; Kumrulu, Umur; Dilgin, Yusuf
This work describes the sensitive voltammetric determination of favipiravir (FAV) based on its reduction for the first time with a low-cost and disposable pencil graphite electrode (PGE). In addition, the determination of FAV was also performed based on its oxidation. Differential pulse (DP) voltammograms recorded in 0.5 M H2SO4 for the reduction of FAV show that peak currents increase linearly in the range of 1.0 to 600.0 μM with a limit of detection of 0.35 μM. The acceptable recovery values (98.9–106.0 %) obtained from a pharmaceutical tablet, real human urine, and artificial blood serum samples spiked with FAV confirm the high accuracy of the proposed method.
Streamline analysis of MHD flow in a double lid-driven cavity
(SAGE Publications Ltd, 2023) Çelik, Ebutalib; Guerbuez-Caldağ, Merve
The magnetohydrodynamic flow of an incompressible, steady and electrically conducting fluid is considered in double lid-driven square cavity under an inclined magnetic field. The non-dimensional governing equations are solved numerically using a radial basis function (RBF) approximation meshless method in order to obtain the flow patterns. Hartmann number (Formula presented.) and the inclination angle of magnetic field (Formula presented.) are taken as a problem variables that produce various flow transformations by their variation for (Formula presented.). Streamlines are examined topologically, and it has been observed that the inclination angle and strength of magnetic field have different influence on the bifurcation of flow structures.
Voltammetric determination of Molnupiravir used in treatment of the COVID-19 at magnetite nanoparticle modified carbon paste electrode
(Elsevier Inc., 2023) Vural, Kader; Karakaya, Serkan; Dilgin, Didem Giray; Gökçel, Hatice İsmet; Dilgin, Yusuf
To reduce the progression of the viral process in patients infected with COVID-19, new treatments and drug active substances are needed. One of these drugs is Molnupiravir (MNP) which has a direct antiviral effect and has also proven to be highly effective in reducing the azopharyngeal SARS-CoV-2 infectious virus and viral RNA. Due to the importance and frequent use of this drug in the treatment of COVID-19, its accurate, quick, and cheap detection in pharmaceutical or biological samples is crucial. In this work, electrochemical behavior and sensitive voltammetric determination of MNP are described using a magnetite nanoparticle modified carbon paste electrode (Fe3O4@CPE) for the first time. Fe3O4 nanoparticles (NPs) were characterized by recording their transmission electron microscopy (TEM) images, energy dispersive X-ray (EDX), and X-ray diffraction (XRD) spectra. Cyclic voltammetric measurements showed that MNP was irreversibly oxidized at Fe3O4@CPE at 760 mV in pH 2.0 Britton Robinson buffer solution (BRBS). The peak current of MNP was increased approximately threefold at Fe3O4@CPE compared to bare CPE due to a good electrocatalytic efficiency of Fe3O4 NPs. According to differential pulse voltammetric studies, the fabricated electrode exhibited a linear range (LR) between 0.25 and 750 µM with sensitivity and limit of detection (LOD) of 4591.0 µA mM−1 cm−2 and 0.05 µM, respectively. On the other hand, although lower sensitivity (327.3 µA mM−1 cm−2) was obtained from CV compared to DPV, a wider linear calibration curve between 0.25 and 1500 µM was obtained in CV. Studies performed in tablet samples confirmed that the Fe3O4@CPE exhibits high applicability for selective and accurate voltammetric determination of MNP in real samples.
Öğretmen Adaylarının Bilimin Doğası Öğretimine Yönelik Anlayışlarının Değerlendirilmesi
(Hacettepe Üniversitesi, 2021) Çavuş Güngören, Seda; Hamzaoğlu, Ergin
Bu çalışmanın amacı, fen bilgisi öğretmen adaylarının bilimin doğası öğretimine ilişkin anlayışlarını değerlendirmektir. Ayrıca farklı öğretim yöntemlerine odaklanmanın bu konuda oluşturabileceği farklılıklar incelenmiştir. Araştırmaya bir devlet üniversitesinin 3. sınıfında okuyan 41 fen bilgisi öğretmen adayı katılmıştır. Çoklu durum çalışması olarak tasarlanan araştırma, bilimin doğası ve bilim tarihi dersi kapsamında gerçekleştirilmiştir. Ders kapsamında öğretmen adaylarına bilimin doğası, öğretiminin önemi, öğretim programındaki yeri, ortak bilgi yapılandırma modeli ve bağlam temelli öğretim yaklaşımı konularında eğitim verilmiştir. Veri toplama aracı olarak bilimin doğası öğretimi hakkındaki açık uçlu sorular, yarı yapılandırılmış görüşmeler ve günlükler kullanılmıştır. Verilerin analizinde betimsel analiz kullanılmış ve beş boyutta çözümlenmiştir. Bu boyutlar; bilimin doğası içeriğinin öğretimi, bilimin doğası öğretiminin kazandırdıkları, bilimin doğası öğretiminin içeriği, öğretmenin-öğrencinin rolü ve görüş belirtmedi olarak ele alınmıştır. Araştırma sonuçları öğretmen adaylarının bilimin doğası öğretimine yönelik anlayışlarının yeterli olduğunu göstermiştir. Öğretmen adaylarının farklı öğretim yöntemlerine odaklanmaları bilimin doğası öğretimine yönelik anlayışlarında ilgili boyutlar açısından önemli bir farklılaşmaya neden olmadığı belirlenmiştir.
Quantum dots-based photoelectrochemical sensors and biosensors
(Elsevier, 2021) Dilgin, Yusuf; Karakaya, Serkan; Dilgin, Didem Giray
Photoelectrochemistry has been one of the most frequently studied branches of chemistry for the past 2 decades and its principle is based on monitoring a photocurrent generated by the irradiation of photosensitive material on an electrode surface with a light source. Photoelectrochemical (PEC) analysis has found wide applications in various fields such as water splitting, hydrogen or oxygen production, pollutant degradation, CO2 reduction, and construction of sensors and biosensors. In PEC studies, various photosensitive materials such as organic redox mediators (ORMs), semiconductors, heterostructures, and composite nanomaterials have been used. Among these, quantum dots (QDs) are of great interest to researchers because of their unique and superior optical and electronic properties. In this chapter the principles and mechanisms of PEC-sensing strategies using ORMs, QDs or their hybrid nanostructures are described and applications of PEC-sensing platforms such as in small analyte detection, immunoassays, nucleic acids, and enzyme-based biosensors.
Preservice teachers' nomophobia levels, sense of loneliness and adjustment to college life
(Wiley, 2021) Çevik-Durmaz, Yadigar; Yalçınkaya-Önder, Eylem; Timur, Serkan
Purpose The aim of this study was to investigate whether preservice teachers' nomophobia levels, sense of loneliness and adjustment to university life vary based on their demographic characteristics. Additionally, regression analyses were carried out to determine whether their sense of loneliness, nomophobia levels, and adjustment to university life were predictors of each other. Design and Methods In this quantitative study, the cross-sectional survey research model was used. A total of 234 preservice teachers, 65 of whom were studying at the elementary mathematics department, 81 of whom were studying at the preschool education department, and 88 of whom were studying at the science education department, participated in this study. Independent-samples t test, one-way analysis of variance (ANOVA) and simple linear regression analyses were used to analyze the quantitative data. Findings The main conclusions from this study were that (a) the students with the highest sense of loneliness were the students of the elementary mathematics department, the students with the highest level of nomophobia were the science education students, and the students who adjusted the most to university life were the preschool education students. (b) There were no significant differences between the 1st and 2nd year preservice teachers in terms of their sense of loneliness, nomophobia levels, and adjustment to university life. (c) There were statistically significant differences between the mean total nomophobia scores of the male and female students in favor of the females especially in the "losing connectedness" and "not being able to access information" subscales of nomophobia. (d) A statistically significant difference was found between the preservice teachers whose mothers were high school and university graduates in terms of their academic adjustment in favor of the preservice teachers with mothers who had university degrees. (e) The preservice teachers, who stated that their relationship with their family was very good, had higher levels of sense of loneliness, mobile phone addiction, and adjustment to university life than the others. The results were statistically significant in all total scores of the loneliness scale and dimensions except for the dimensions of nomophobia. (f) The students who were hopeful for the future had a high sense of loneliness and adjustment to university life. It was also determined that the students who were desperate for their future had high mobile phone addiction levels. Apart from nomophobia and its dimensions and the social adjustment dimension of university life, statistically significant differences were found between the hopeful and hopeless students in terms of their sense of loneliness and adjustment to university life. (g) Statistically significant mean differences were found between the students who were generally satisfied with and those that were not satisfied with their life in terms of their sense of loneliness and adjustment to university life with its all dimensions in favor of the satisfied ones. (h) The preservice teachers who lived alone at home had a higher sense of loneliness and better adjustment to university life. It was also noteworthy that the students living in dormitories had higher nomophobia levels than the others. (i) A linear relationship was found between the students' sense of loneliness and adjustment to university life, and sense of loneliness was a significant predictor of adjustment to university life. Practical Implications Determining students' nomophobia levels, sense of loneliness, and adjustment to university life would be beneficial in bringing students who have difficulty adapting to new living environments into social life.
Mathematics teachers’ values about teaching mathematics
(Elsevier, 2021) Akyıldız, Pınar; Aktaş, Fatma Nur; Dede, Yüksel; Hacıömeroğlu, Güney
Not much is known about mathematics teachers’ values, and no assessment tool is available for measuring these to get more insight into their perspectives. The goals of this study are to construct the Mathematics Teachers’ Values Questionnaire (MTVQ) and to determine mathematics teachers’ values about teaching mathematics using the MTVQ. In order to do this, data have been gathered for exploratory factor analysis (n = 637) and confir- matory factor analysis (n = 573) while developing the instrument, and a proportional stratified random sample has been formed consisting of 2226 Turkish middle and high school mathematics teachers working at schools that provide more religious education than other middle and high schools. Five components have been extracted: relevance (C1), practice (C2), information and communications technology (ICT; C3), teaching approach (C4), and consolidating (C5). One result of the study reveals the mathematics teachers emphasize the least ICT value and the most consolidating value.
Possible misconceptions about solid friction
(American Physical Society, 2021) Kızılcık, Hasan Şahin; Aygün, Müge; Şahin, Esin; Çelikkanlı, Nuray önder; Türk, Osman; Taşkın, Tuğba; Güneş, Bilal
This study aims to make a thematic classification of possible misconceptions about solid friction by reviewing papers in the literature which include conceptual difficulties about friction; in this way, the study contributes to the literature. The study's scope was limited to the dry friction that occurs with the interaction of two solid objects, as this is included in several curricula. Papers in the literature addressing the conceptual difficulties associated with friction were reviewed. Hence, 42 primary data sources (papers) accessed from various databases were subjected to content analysis. Possible misconceptions about friction were determined by the data collection techniques or tools of the study, the educational levels of the sample, and the countries in which they took place. At the end of the study, a list of possible misconceptions about solid friction were classified and listed under four themes: definition and existence, direction, type and magnitude, and effects of friction. Most of the possible misconceptions are in the type and magnitude theme and the least were in the direction theme. But friction is always opposite to the direction of the motion as a possible misconception was detected in the highest number of papers. Related to this, the possible misconception that friction prevents movement was frequently encountered. It was also found that both the distinction between sliding and rolling friction and kinetic and static friction was often ignored. In addition, some of the possible misconceptions were found to be similar regardless of country, culture, or education system, as in the previous literature. One of the results of the study is that possible misconceptions are not only held by the students but also held by teachers and preservice teachers. In this respect, the results of the study are also considerable in terms of the direction of teachers in in-service training studies.
Access to information technology of households and secondary school students in Turkey
(SAGE Publications, 2021) İra, Nejat; Yıldız, Mehmet; Yıldız, Gamze; Yalçınkaya-Önder, Eylem; Aksu, Ali
The aim of the study was to investigate secondary school students’ and teachers’ access to information technologies in Turkey by making interregional comparisons. Document analysis of the qualitative research methods was employed to analyze the reports issued by the Turkish Ministry of National Education, the Turkish Statistical Institute (TUIK), and the Programme for International Student Assessment (PISA). The results of the research revealed the importance of access to information and communication technologies for both students and teachers: 67.9% of the participating students were found to have Internet connection and 69.1% a computer in their homes, while 80.3% of the students were observed to use a computer outside the school, but 19.7% were not. The results also showed that 64.6% of the students have Internet connection in their classrooms, but 29.2% of these students do not use the Internet in the classroom, whereas 8.9% use it in the classroom all the time. The rate of students using a digital device for reading is 38.1%, while that of those not using one is 61.9%. Some 32.1% of secondary school students were revealed not to have Internet connection at home. Additionally, 77% of teachers were not trained in online teaching prior to the COVID-19 pandemic. Based on the findings, teachers can be suggested to develop projects – i.e., of TUBITAK, E-twinning, and Erasmus – which potentially encourage students to use information and communication technologies so that both teachers and students can benefit from them. It is also suggested that the Ministry of National Education should work on improving the information communication technology competencies of teachers and students. Besides, policies should be developed to eliminate regional differences in terms of access to digital resources and technology in terms of equal opportunities and opportunities.
Students’ perceptions of teaching behaviour in Turkish secondary education: a Mokken Scaling of My Teacher Questionnaire
(Springer, 2021) Telli, Sibel; Maulana, Ridwan; Helms‑Lorenz, Michelle
Teacher behaviour has signifcant impact on student learning and outcomes and determines the teaching quality in learning environments. The My Teacher Questionnaire (MTQ) has been used to assess students’ perceptions of teaching behaviour in national and international studies with well-cited outcomes. In this cross-sectional survey study, we adjusted and shortened the MTQ for diverse settings in Turkish secondary education, using the nonparametric IRT model, Mokken Scaling (MS). The sample consisted of 12,036 students (grade 9–12, age 15–19 years) involving 446 classes/teachers from 24 general public high schools in Turkey. More than half of the students (n=6544, 54.40%) were females, while 306 students (2.5%) did not report their gender. The MS polytomous Double Monotonicity Model (DMM) was employed for scaling the individual student data. The ten selected items (MTQ10) showed a strong unidimensional structure (H=0.61) with good internal reliability (Cronbach’s α=0.93, Molenaar Sijtsma ρ=0.93) and construct validity. The fnal structure was tested on three random data sets and convergent validity of the MTQ10 was examined using student engagement in learning. The scale MTQ10 functioned well across various groups (random samples, genders, grades, subjects). Based on these results, MTQ10 reveals strong psychometric quality for the assessment of students’ perceptions of teaching behaviour with the potential to deepen our understanding of teaching behaviours and teaching quality in Turkey.
Ortaokul Öğrencilerin FeTeMM Mesleklerine Yönelik İlgileri
(Çanakkale Onsekiz Mart Üniversitesi, 2020-12-31) Timur, Betül; Badur, Sercan
Bu araştırmanın amacı ortaokul öğrencilerinin FeTeMM (Fen, Teknoloji, Mühendislik ve Matematik) mesleklerine yönelik ilgilerini tespit etmektir. Bu araştırmada nicel araştırma yöntemleri kapsamında, tarama araştırması türlerinden kesitsel tarama araştırması modeli kullanılmıştır. Araştırmanın evrenini Çanakkale Merkez’de 2016-2017 eğitim-öğretim yılında 5, 6, 7 ve 8. sınıf düzeylerinde eğitim-öğretim gören 834 ortaokul öğrencisi oluşturmaktadır. Bu çalışmada Kier, Blanchard, Osborne ve Albert (2014) tarafından ortaokul öğrencileri için geliştirilen ve özgün adı “STEM Career Interest Survey (STEMCIS)” olan Koyunlu-Ünlü, Dökme ve Ünlü (2016) tarafından Türkçe’ye uyarlanmış biçimi olan “FeTeMM Mesleklerine Yönelik İlgi Ölçeği (FeTeMM-MYİÖ)” adlı ölçek kullanılmıştır. Bu çalışmada ölçeğin genel ölçüm güvenirliği .91, fen, teknoloji, mühendislik ve matematik alt boyutları için Cronbach ? değerleri sırasıyla .88; .87; .90; ve .91 olarak hesaplanmıştır. Elde edilen veriler SPSS (Statistical Package for the Social Sciences) paket programı kullanılarak t-testi ve varyans analizi (ANOVA) ile değerlendirilmiştir. Öğrencilerin FeTeMM mesleklerine yönelik ilgilerinin cinsiyet ve sınıf düzeyi değişkenlerine göre anlamlı olarak farklılaştığı sonucuna ulaşılmıştır. Fen alt boyutundaki ilginin cinsiyet, kendini en başarılı bulduğu ders, sınıf düzeyi; teknoloji alt boyutundaki ilginin cinsiyet, kendine ait bilgisayar, tablet ya da çalışma odasına sahip olma durumu, sınıf düzeyi; mühendislik alt boyutundaki ilginin cinsiyet; matematik alt boyutundaki ilginin ise kendini en başarılı bulduğu ders, sınıf düzeyi değişkenleri temelinde anlamlı olarak farklılaştığı sonuçlarına ulaşılmıştır. Elde edilen sonuçlara yönelik öneriler sunulmuştur.
Fen ve Teknoloji Öğretmenlerinin ve Öğretmen Adaylarının Çevreye Yönelik Bakışlarının İncelenmesi
(Çanakkale Onsekiz Mart Üniversitesi, 2013) Timur, Serkan; Timur, Betül; Yılmaz, Şirin
Bu çalışmanın amacı fen ve teknoloji öğretmenlerinin ve öğretmen adaylarının çevreye yönelik bakış açılarını farklı değişkenlere göre incelemektir. Çalışma, 43 fen ve teknoloji öğretmeni ve 49 fen ve teknoloji öğretmen adayı ile yürütülmüştür. Tarama modeli kullanılarak gerçekleştirilen çalışmada Karakaya (2009) tarafından geliştirilen çevreye yönelik bakış açısı ölçeği kullanılmıştır. Çalışma sonunda fen ve teknoloji öğretmenlerinin öğretmen adaylarına göre çevreye yönelik bakış açılarının daha olumlu olduğu sonucu ortaya çıkmıştır. Ayrıca bayan öğretmenlerin çevreye yönelik bakış açılarının hem bayan hem de erkek öğretmen adaylarına göre daha olumlu olduğu sonucuna ulaşılmıştır. Öğretmenlerin ve öğretmen adaylarının çevreye yönelik bakış açılarının mezun oldukları lise türüne göre anlamlı olarak farklılaşmadığı ortaya çıkmıştır. Elde edilen sonuçlara dayalı olarak öğretmen yetiştirme programlarına ve yapılacak olan çalışmalara ilişkin çeşitli öneriler sunulmuştur.

Güncel Gönderiler