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Search Results: 1 - 10 of 20422 matches for " Serap ?al??kan "
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Student Understanding of Some Quantum Physical Concepts
Serapal??kan,Gamze Sezgin Sel?uk
Latin-American Journal of Physics Education , 2009,
Abstract: In spite of nearly a century, quantum physics and quantum phenomena seem to be having some difficulties toinfluence the human brain and logic hence some considerable effort has recently been spending to overcome suchdifficulties. As a part of the international efforts, we composed a questionnaire named as Quantum ConceptsQuestionnaire (QCQ) to investigate student ideas about some concepts in quantum physics and quantum phenomena.In this work, the concepts of electron, wave function, wave-particle duality and structure of atom are specificallyinvestigated and obtained data are statistically analysed. The QCQ is administered to 71 undergraduate students allcompleted the quantum physics course at Education Faculty of Buca, Dokuz Eylül University in Izmir, Turkey. Finallysome important outcomes of the research are presented, discussed and certain suggestions are briefly made.
The Effects of Problem Solving Instruction on Physics Achievement, Problem Solving Performance and Strategy Use
Gamze Sezgin Sel?uk,Serapal??kan,Mustafa Erol
Latin-American Journal of Physics Education , 2008,
Abstract: This study has investigated the effects of problem solving instruction on physics achievement, problem-solving performance and strategy use in an introductory physics course at university level. In this study, pretest-posttest and quasi-experimental design with nonequivalent control group was used. Two groups of student teachers (n=74) participated in this study. During the 8-week study, one group received the strategy instruction while the other group acted as control. Data of the study were collected by Physics Achievement Test (PAT), Problem-Solving Performance Test (PSPT) and Problem-Solving Strategies Scale (PSSS). Findings of the study indicate that strategy instruction was effective on physics achievement, problem-solving performance, and strategy use. The implications of these results for physics instruction are discussed.
Evaluation of animal-borne health problems in anakkale province in terms of human and environmental health
Vedat ?al??kan
International Journal of Human Sciences , 2009,
Abstract: The effects of various animal sources in anakkale on human health and their distribution properties were evaluated in the study. The relationship between the faunal characteristics and the human activities in the region in observing zoonotic diseases or cases of poisoning based on various animal sources in anakkale was investigated. The findings of many investigations on the region and the statistical data of the institutions concerned were used in the study. In addition, the interviews with the physicians working at the health institutions in the province contributed to the production of data. Besides the presence of the cases of Crimean-congo hemorrhagic fever, brucella, anthrax, snake bites, animal-borne food poisoning and etc. in the region, the risks of diseases such as avian influenza, malaria and rabies were detected. The factors influencing the occurrence of animal-borne diseases and their distribution properties in the region as well as the areas under risk were specified by means of the study. Detecting the spatial and seasonal distributions of some of the diseases concerned will contribute to planning public health and emergent health services in the province in general.
The Effects of Gender and Grade Levels on Turkish Physics Teacher Candidates' Problem Solving Strategies
Gamze SEZG?N SEL?UK,Serap ?ALI?KAN,Mustafa EROL
Journal of Turkish Science Education , 2007,
Abstract: The aim of this research is to determine how much physics teacher candidates use problem solving strategies and to investigate the effects of gender and grade levels on it. Research data was collected by a Likert-type "Problem Solving Strategies Scale". It has 35 items and its Cronbach Alpha reliability coefficient was found 0,82. 141 students from all grade levels had participated into the research voluntarily. The data has been analyzed by using some statistical techniques as frequency, percentage, mean, Standard deviation, t-test, variance analysis and Scheffé Test. It was concluded that there was a statistically significant difference among groups according to the variables of gender and grade levels. It was also found that female teacher candidates use the problem solving strategies more frequently than the male ones; as the class level increased, the frequency of candidates who use problem solving strategies were also increased.
Preparation of Smart Fluid from Polymer Coated Pumice Particles  [PDF]
Hasim Yilmaz, Abdullah ?al??kan, ümmihan T. Yilmaz
World Journal of Condensed Matter Physics (WJCMP) , 2016, DOI: 10.4236/wjcmp.2016.63026
Abstract: This study reports, electrorheological (ER) responses of pumice and poly(methyl methacrylate)/ pumice, PMMA/pumice, conducting composite dispersions in silicone oil (SO). Primarily three different compounds (K1, K2, K3, 73%, 48%, 22% contain pumice particles) PMMA/pumice composites were prepared and used as ER active materials. Anti-sedimentation stabilities of pumice and composite systems in silicone oil (SO) medium were determined. The application of a suspension of composite particles as an electrorheological ER fluid (20% particle concentration) was assessed using a rotational electro-rheometer, and the effects of the electric field strength, shear rate, frequency and temperature were examined. ER activity of all the composite suspensions was observed to increase with increasing concentration, electric field strength and decreasing shear rate. The PMMA/pumice composites suspensions show a typical shear thinning non-Newtonian viscoelastic behavior, in which viscosity of the suspension decremented sharply with incrementing shear rate. The ER measurement results showed that the performance of the composite suspensions was enhanced by increasing the electric field strength.
Analysis of Ankara urban area from human bioclimatologic point of view
Onur ?al??kan,Necla Türko?lu
International Journal of Human Sciences , 2011,
Abstract: In this study, the Physiological Equivalent Temperatures (PET) of different land patterns in the Ankara urban area has been analyzed. The spatial distribution and temporal variation of the thermal perceptions and the grades of thermal stress caused by the thermal conditions have been determined for 00:00, 03:00, 06:00, 09:00, 12:00, 15:00, 18:00 and 21:00 hours during the December and July of 2010. The effects of physiographic features such as elevation, aspect, slope, and especially land use, on the PETs have also been examined. According to the analysis which is carried out by using PET thermal perception index, in the research area the thermal comfort values varies around from -6 to -11°C in winter and from 13°C to 50°C in summer. In both periods the open spaces (grasslands) of the city forests have the maximum PET values during the day. Either in December and in July the urban area (city center) has and cool island during the day and has a heat island during the night.
Developing an attitude scale assessment and evaluation and analyzing of social studies teachers attitude levels in terms of several variables
Hüseyin ?al??kan,Kubilay Yaz?c?
International Journal of Human Sciences , 2013,
Abstract: This research was made with the aim to develop an “Attitude Scale for Assessment and Evaluation” to determine teachers’ attitudes towards assessment and evaluation, besides it is aimed to put forth If the social studies teachers’ attitude levels are differed or not in terms of variables “gender”, “age”, “seniority” and “settlement”. The 549 social studies teachers from all provinces of Turkey who joined to in-service training seminars organized by the Ministry of National Education constitute the study group. As a result of research, the scale consisted of 22 items and three factors. As a result of scale measurements, it is identified that social studies teachers’ attitude levels are not high enough towards assessment and evaluation and there is not a differentiation according to the variables “gender”, “age”, “Professional level of seniority” and “the settlement of the task”.
An Evaluation of Education with Museum Practices in Social Studies Classes Based on Student Views
Hüseyin ?al??kan,Sebahat ?erkez
International Online Journal of Educational Sciences , 2012,
Abstract: The purpose of this study is to evaluate education with museum practices used in social studies classes based on the views of students who actually receive them as part of these classes. The study sample consists of 26 seventh grade students enrolled at the Merkez Public Elementary School, located at the central district of Kastamonu province, during the academic term 2009-2010. The researchers made use of interview forms first disseminated among and collected upon completion by subjects, as the data collection tool. The forms thus prepared were applied to students with a view to obtain their opinions about the process at the end of education with museum sessions held as part of the social studies classes. Data obtained during the study were analyzed using the content analysis method, at the end of the study. Consequently, the study revealed that generally positive impressions were spelt among the opinions of students taken for evaluation, who expressed their pleasure with the practices. Also it was found that education with museum practices had positive impacts and contributions to the class environments and that no difficulties were encountered in time of implementation of the practices.
René WELLEK (Translation: Adem ?al??kan)
Journal of International Social Research , 2010,
The puzzling assembly of the Milky Way halo – contributions from dwarf Spheroidals and globular clusters
Koch A.,Lépine S.,al??kan ?.
EPJ Web of Conferences , 2012, DOI: 10.1051/epjconf/20121903002
Abstract: While recent sky surveys have uncovered large numbers of ever fainter Milky Way satellites, their classification as star clusters, low-luminosity galaxies, or tidal overdensities remains often unclear. Likewise, their contributions to the build-up of the halo is yet debated. In this contribution we will discuss the current knowledge of the stellar populations and chemo-dynamics in these puzzling satellites, with a particular focus on dwarf spheroidal galaxies and the globular clusters in the outer Galactic halo. Also the question of whether some of the outermost halo objects are dynamically associated with the (Milky Way) halo at all is addressed in terms of proper measurements in the remote Leo I and II dwarf galaxies.
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