Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Dertli, Enes(116)
- Şahin, Engin(48)
- Kaya, Yunus(46)
- Özen, Soner(46)
- İspirli, Hümeyra(45)
- Pat, Suat(44)
- Şenay, Volkan(42)
- Korkmaz, Şadan(36)
- Yilmaz, Mustafa Tahsin(33)
- Kutlu, Naciye(32)
- Cuce, Erdem(31)
- Öner, Erdal(31)
- Artar, Musa(30)
- Ertugrul, Mehmet(29)
- Hasar, Ugur Cem(29)
- Mercan, Emin(28)
- Bayraktar, Bülent(27)
- Bayram, Sinan(27)
- Can, Zehra(25)
- Ecem Bayram, Nesrin(25)
- Çolak, Murat(23)
- Özdemir, Akın(23)
- Cuce, Pinar Mert(22)
- Sert, Durmuş(22)
- Ayata, Ümit(21)
- Bayram, Ozkan(21)
- Dirican, Ebubekir(20)
- Abdioglu, Murat(19)
- Ayazoglu, Rabil(19)
- Birinci, Ahmet(19)
- Kamiloğlu, Aybike(19)
- Gerçek, Yusuf Can(18)
- Taylan, Osman(18)
- Tozlu, Alperen(18)
- Gul, Volkan(15)
- Hasar, Ugur C.(15)
- Kadakal, Mahir(15)
- Sagdic, Osman(15)
- Ergün, Mustafa(14)
- Kadakal, Huriye(14)
Yayınlar
- MakaleAçık Erişim2014Scopus SJRQ3Comparison of Levitation Forces of Bulk MgB2 Superconductors Produced by Nano Boron and Carbon-Doped Nano Boron
Duz, I.; Guner, S. B.; Erdem, O.; Demir, I.; Kapucu, V.; Çelik, S.; Ozturk, K.; Hossain, S.; Gencer, A.; Yanmaz, E.
MgB2 bulk superconductors were prepared by hot press plus furnace heating method. Two types of boron powders were used, one is amorphous nano boron and the other is C-doped boron. Characteristics of superconductors were determined by XRD and resistance measurements. Systematic levitation force measurements were performed by using a modular system at low temperatures. These bulk superconductors showed around 9 N repulsive and 4 N attractive forces in the z-axis at 20 K at closest point to the cryostat lid which contains the MgB2 superconductor. These values slightly decreased by increasing temperature to 24 and 28 K for both samples. Comparing two samples, nano boron MgB2 showed slightly higher levitation force than C-doped MgB2 although C-doped MgB2 has higher attractive force value at the closest point. This situation points out that C-doped MgB2 is much proper for attractive force applications (as guidance force) while the nanoboron MgB2 sample is much appropriate for repulsive force (as levitation).
AtıfScopus13WoS13OpenAlex17
İncele - MakaleAçık Erişim2013The Attitudes of Parents Affecting Moral Maturity Levels of High School Students
Sengün, Mustafa
This study tries to analyze the attitudes of parents which may affect moral maturity levels of high school students. The study is based on field research. Field research was carried out on the 830 high school sudents selected randomly from some high schools took place in Samsun. Data of the study were collected by Moral Maturity Scale and Individual Acknowledgement Questionnaire developed by the researcher. Statistical analyses of data were done with variance analysis, t-test and Scheffe tests. Lastly, it was found that the attitudes of parents were the prominent factors affecting the moral maturity levels of high school students.
AtıfWoS2OpenAlex7İncele - BildiriYalnız künye2013TECHNOLOGY SUPPORTING THE EVOLUTION OF SPATIAL THINKING: A CASE STUDY WITH PRE-SERVICE TEACHERS
Karadag, Zekeriya; Chova, LG; Martinez, AL; Torres, IC
Pre-service teachers, taking a method course to teach mathematics at elementary classroom, were exposed to explore various activities by using soma cubes. The research explores the participants' evolving ability of spatial visualization, which was very low at the beginning. They were struggling while drawing or constructing even very basic constructions. However, the improvements were accelerated as they integrated technological tools, StarBoard and SketchUp because of the flexibility and usability provided by these tools. The main corpus of data consists of participant own reflections on the pros and cons of integrating technology and how technology affected their visualization and spatial reasoning.
- BildiriYalnız künye2013EXPLORING THE EVOLUTION OF GEOMETRICAL THINKING
Karadag, Zekeriya; Chova, LG; Martinez, AL; Torres, IC
Geometry situated artefacts is a great resource to have learners experience geometry. This study explores how pre-service teachers go through this experience and how they benefit by connecting real life geometry to their learning geometry trajectory. Moreover, the study documents how participant pre-service teachers develop understanding of basic transformational geometry. The results suggest that participants may also have learned how to encourage their prospective students.
- MakaleAçık Erişim2013DETERMINATION OF PHYSICAL PROPERTIES OF LAMINATED COMPOSITE BEAM VIA THE INVERSE VIBRATION PROBLEM METHOD
Balci, Murat; Gündogdu, Omer
In this study, some physical properties of a laminated composite beam were estimated by using the inverse vibration problem method. Laminated composite plate was modeled and simulated to obtain vibration responses for different length-to-thickness ratios in ANSYS. A numerical model of the laminated composite beam with unknown parameters was also developed using a two-dimensional finite element model by utilizing the Euler-Bernoulli beam theory. Then, these two models were embedded into the optimization program to form the objective function to be minimized using genetic algorithms. After minimizing the squared difference of the natural frequencies from these two models, the unknown parameters of the laminated composite beam were found. It is observed in this study that the Euler-Bernoulli beam theory suppositions approximated the real results with a rate of %0.026 error as the thickness of the beam got thinner. The estimated values were finally compared with the expected values and a very good correspondence was observed.
AtıfWoS3OpenAlex8İncele - MakaleYalnız künye2013The Natural Disasters in the Geography Teaching Curriculum
Degirmenci, Yavuz; Ilter, Ilhan
Disasters affect all aspects the communities and environment is a fact that we live on of our world. It takes place that types of natural disasters at different times and in types of the world and these affect people in many ways such as social, economic, and cultural. As it known that our country is an extremely risky structure in terms of natural disasters. Because of locating on the earthquake zones of Turkey's geographical position causes frequent to exposure earthquakes. In addition, existence of diversity of the earth surface, different climates, extreme situations, and lack of information about disaster education disaster awareness increase effect of disasters in our country. Education and training programs play an important role on disaster awareness and disaster education and formatting of human profile which is sensitive to environmental and compatible with environmental. From this perspective, geography lesson is an important on growing the consciousness of individuals who know his environment, aware of his boundaries and has awareness of natural disasters. The purpose of this study is determined how many activities, skills, values, techniques of measurement and evaluation, achievements, learning fields about natural disasters in the Geography Teaching Curriculum. This study used method of analysis document; it is exampled that sufficiency of Natural Disasters is in the program by based on current Geography Teaching Curriculum. The data obtained were analyzed using descriptive analysis. To results, it has seen that about achievements of natural disasters have been in the level of every grades. It has been determined that most of these achievements are levels of 9th the grade (f=24) the least is 12th grade (f=22). Analyzed the distribution of achievements by learning fields; it is intensity in the in the environment and society of learning field and it has been seen that it has observed less in the global environment: regions and countries of learning field.
- BildiriYalnız künye2013THE EFFECT OF 7E MODEL ON ACADEMIC ACHIEVEMENTS AND RETENTION IN THE UNIT ELECTRICITY IN OUR LIFE 6TH GRADE SCIENCE AND TECHNOLOGY COURSE
Turgut, Umit; Gurbuz, Fatih; Salar, Riza; Chova, LG; Martinez, AL; Torres, IC
The aim of this study is to determine the effects of materials based on the 7E learning model on students' achievement and retention of knowledge at unit of Electricity in Our Life in Science and Technology course on elementary school at 6th grade. This study was carried out with 45 sixth grade students in two classrooms of a public elementary school at the second semester of 2011-2012 academic year. In the study, pretest and posttest control and comparison group quasi-experimental is used. One of the classrooms was selected randomly as the experimental group (n=24) and the another as the control group (n=21). While the students in the experimental group were carried out with materials based on 7E learning model, teaching in control group was carried out according to teaching method and models suggested by course books developed based on Science and Technology teaching program and approved by Ministry of Education. As a tool for collecting data both before and after applications, Electricity in Our Life Test was applied on the students in the both groups. In order to test the hypotheses of the study, for dependent and independent groups t test was used. When it was evaluated the data gained from the pretests, it was observed that the groups had the same knowledge level. As a result of the statistical study, it was found out that materials based on 7E learning model support significantly students' achievement and retention level.
- BildiriYalnız künye2013THE ATTITUDES OF PHYSICS TEACHER CANDIDATES TOWARDS THE CONCEPTS IN SPECIAL THEORY OF RELATIVITY AND THEIR EVALUATION DESIGNS
Turgut, Umit; Salar, Riza; Gurbuz, Fatih; Chova, LG; Martinez, AL; Torres, IC
In this study, the viewpoints of physics teacher candidates at undergraduate level towards the concepts in special theory of relativity and the interpretations they made about these concepts were investigated. The attitudes of the teacher candidates towards the concepts in the subject of special theory of relativity were revealed with six open ended questions prepared by the writers who are physics teachers as well. The research is a qualitative study and the study was conducted with eighteen teacher candidates. In this study, case study, one of the methods of qualitative research, was used. The study group of the research was chosen by convenience sampling. The data collected via open ended questions was analysed by descriptive analysis method. According to the results of the study, it was revealed that most of the students have not been introduced to the special theory of relativity and the concepts related to them. It can be stated that the candidates had difficulty with the relativity of time and its reference frame. Most of the teacher candidates could not make the interpretation that the speed of light was the limit speed and no other object could reach that speed.
- MakaleYalnız künye2013The Iddet Time and the Marriage of the Woman Waiting Iddet Time According To Islamic Law
Erdem, Suat
In the Islamic Law, Iddet means the disappearence of the marriage principles with the ending of the marriage because of any reasons and the time must be waited for another marrige by the woman. Iddet can be classified in two with regard of the causes of the action giving rise the divorce as the iddet of divorce and death, and it also can be subjected to a classification for the time of iddet as menstruation, pregnance and periodical iddet. As it is impossible to make a marriage proposal to a woman who is waiting the time of iddet directly or indirectly, there is an agreement on the subject of the impossibility of making a marriage proposal to a woman directly. As it is not possible to make a marriage proposal to a woman waiting iddet of death directly, an indirect proposal is possible only with an agreement. There is an agreement among the Islamic Lawyers on the subject of canceling the marriage which has taken place notwithstanding the ban, but the agreement isn't available about the marrige of the same couple after the time of iddet.
AtıfWoS1İncele - MakaleAçık Erişim2013Scopus SJRQ2Carbonic anhydrase activity from the gilthead sea bream (Sparus aurata) liver: The toxicological effects of heavy metals
Kaya, Elif Duygu; Söyüt, Hakan; Beydemir, Sukru
Many studies have shown that metal ions may lead to oxidative stress in biological systems. Accordingly, DNA damage, protein modification, enzyme inhibition and activation, lipid peroxidation and many other effects may occur in living organisms. Many different formations of metal ions may enter human cells along with water, air, and various foods, and humans are negatively affected by these conditions, either directly or indirectly. These effects may cause irreversible damage to human metabolism. In this study, the toxicological effects of heavy metals on carbonic anhydrase enzyme activity from the gilthead sea bream liver were investigated. The carbonic anhydrase enzyme was purified via affinity chromatography and had a specific activity of 6775.5 EU mg(-1). The kinetics and characteristic properties, such as optimum pH, stable pH, optimum temperature, activation energy (E-a), activation enthalpy (Delta H), Q(10), K-m, and V-max, were determined for the purified enzyme SDS-polyacrylamide gel electrophoresis showed a single band and molecular weight of the subunit was approximately 25 kDa. Cd(II), Cu(II), Ni(II) and Ag(I) inhibited the enzyme activity in vitro. The type of inhibition and K-i values for these metals were calculated from Lineweaver-Burk plots as 17.74 mM, 36.20 mM, 12.85 mM and 0.025 mM for Cd(II), Cu(II), Ni(II) and Ag(I), respectively. All the metals were noncompetitive inhibitors. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.
AtıfWoS27OpenAlex32
İncele - MakaleAçık Erişim2013Scopus SJRQ3Solid phase extraction of Cd(ii) and pb(ii) ions by a new carbothioamide derivative
Ozdes, Duygu; Duran, Celal; Bayrak, Hacer; Serencam, Huseyin; Basri Senturk, Hasan
An effective, simple, low cost and accurate sorption-spectrophotometric platform for the extractions and subsequent quantifications of Cd(II) and Pb(II) ions in food and environmental samples has been described in this dissertation. The separation and preconcentration of the analyte ions were accomplished by solid phase extraction method based on the adsorption of their N-(4-methylphenyl)-2-{[(4-phenyl-5-pyridin-4-yl-4H-1,2,4-triazol-3-yl)thio] acetyl} hydrazinecarbothioamide (MFPTAHK) complex on Amberlite XAD-8 resin in a mini column. The developed method was systematically investigated in different set of experimental parameters that influence the separation and preconcentration of Cd(II) and Pb(II) ions. The precision of the method was determined by reproducibility studies and expressed as relative standard deviations (RSD %) which were less than 4% for both analyte ions. The limits of detections (LODs) for Cd(II) and Pb(II) ions based on the three times the standard deviation of the blanks (N:10) were found to be 0. 31 ?g L-1 and 0. 86 ?g L-1, respectively. The developed SPE procedure was utilized for the simultaneous extraction and determinations of Cd(II) and Pb(II) ions levels in rice, cracked wheat and red lentil as food samples and various water samples.
AtıfScopus5WoS4OpenAlex5İncele - Derleme MakaleYalnız künye2013Scopus SJRQ1Toward a sustainable energy future in Turkey: An environmental perspective
Serencam, Huseyin; Serencam, Ugur
As long as the energy future of Turkey is concerned there is a consensus among all parties involved in the subject that a strong sustainability based on diverse range of renewable and variety of sources with efficient and fair use of energy is a must. The main criterion in this approach is to use energy with the least possible greenhouse gases and other harmful emissions. A shift in focus to meeting the needs of energy service sector will be immediately felt in the sustainable energy future in Turkey. Another important aspect of the sustainable energy future of Turkey is that all energy users, as more knowledgeable and active participants will be more involved in various stages of the process. However, Turkey has a long way to reach this vision, because of growing greenhouse emissions related to energy production and utilization of alternative energy is slow. Besides, the intensity of energy of the Turkish economy is decreasing slower than many other OECD countries. In addition, energy consumption per person in Turkey is far above the service needs, even for modern lifestyles. There are substantial obstacles on the way to a sustainable energy future of Turkey, such as various aspects of economic structure, a misdirected energy market process, and a lack of vision among the decision makers.
AtıfScopus12WoS10OpenAlex12İncele - MakaleYalnız künye2013Scopus SJRQ2The infrared, Raman, NMR and UV spectra, ab initio calculations and spectral assignments of 2-amino-4-chloro-6-methoxypyrimidine
Cinar, Z.; Karabacak, M.; Cinar, M.; Kurt, M.; Chinna Babu, P.; Sundaraganesan, N.
(Graph Presented) The 2-amino-4-chloro-6-methoxypyrimidine abbreviated as ACMP have been investigated by both the experimental and theoretical methods; through this work we provide the essential fact about the structural and vibrational insights. The optimized molecular structure, atomic charges, vibrational frequencies and ultraviolet spectral interpretation of ACMP have been studied by performing DFT/B3LYP/6-311++G(df,pd) level of theory. The FT-IR, FT-Raman spectra were recorded in the region 4000-400 cm -1 and 4000-50 cm-1 respectively. The UV absorption spectrum of the compound that dissolved in ethanol and water solution were recorded in the range of 200-400 nm. The scaled wavenumbers are compared with the experimental values. The difference between the observed and scaled wavenumber values of most of the fundamentals is very small. Based on the UV spectrum and TD-DFT calculations, the electronic structure and the assignments of the absorption bands were carried out. The 1H, 13C and DEPT 135 nuclear magnetic resonance (NMR) chemical shifts of the molecule were calculated using with the Gauge Including Atomic Orbital (GIAO) method and compared with experimental results. Besides, molecular electrostatic potential (MEP), frontier molecular orbitals (FMO) analysis were investigated using theoretical calculations.
AtıfScopus11WoS10OpenAlex11İncele - MakaleAçık Erişim2013Scopus SJRQ1Reference-plane invariant transmission-reflection method for measurement of constitutive parameters of liquid materials
Hasar, Ugur Cem; Barroso, Joaquim José; Kaya, Yunus; Ertugrul, Mehmet; Bute, Musa
We propose a new transmission-reflection method for measuring constitutive parameters of liquid samples inside an asymmetric measurement cell (a sample over a low-loss holder in vertical position inside an empty waveguide section). We derived reference-plane invariant expressions for constitutive parameters measurement of liquid samples from reference-plane dependent scattering parameters. In addition, we also applied a simple approach for unique determination of transformation factor and reference-plane distances. After, we also investigated how the performance of the proposed method could be improved by performing a differential uncertainty analysis. From this analysis, we found the following key results: (a) the accuracy of the proposed method could be enhanced for low-loss liquid samples by using thicker samples, and (b) the effect of constitutive parameters and the length of the (low-loss) sample holder on constitutive parameters measurements of liquid samples by the proposed method is a key parameter in increasing the accuracy of the measurements. Finally, we performed constitutive parameter measurements of distilled water and methanol to validate the proposed method and compared the proposed method with similar methods in the literature. From the measurements, we note that our method is especially useful for liquid sample measurements when the reference-plane transformation factors are not known a priori and/or if the measurements are carried out over a high frequency range.
AtıfScopus20WoS19OpenAlex22İncele - MakaleAçık Erişim2013Scopus SJRQ1Effect of ultrasonic treatment on reduction of Esherichia coli ATCC 25922 and egg quality parameters in experimentally contaminated hens' shell eggs
Sert, Durmus; Aygun, Ali; Torlak, Emrah; Mercan, Emin
Backround: In this study, hen eggs which were experimentally contaminated with Esherichia coli ATCC 25922 were used. Contaminated eggs were washed statically (S5 to S30; 0 kHz) and by ultrasonic waves (U5 to U30; 35 kHz) for given applications of time (5, 15 and 30 min), then the eggs were stored at 22°C for 14 days. Results: Depending on the time of ultrasonic application, a significant increase in egg shell strength (P < 0.01) was recorded. The highest value of the Haugh unit (67.93, 1 day) was observed on the eggs which were washed by ultrasonic waves. Yolk width values of ultrasonic washed eggs diminished. E. coli was completely removed by 30 min of ultrasonic application. During storage E. coli growth was not detected on the eggs which were washed by ultrasonic waves except the eggs in U5 group (2.04 log CFU eggshell-1) on the first day of storage. Conclusion: Depending on the time of ultrasonic application a significant increase in egg quality parameters (shell strength, albumen height, Haugh units, and yolk height) were observed. The application of ultrasound led to a significant reduction in E. coli numbers on egg shells.
AtıfScopus21WoS20OpenAlex21İncele - MakaleAçık Erişim2013Scopus SJRQ2New water mites of the family Hygrobatidae (Acari, Hydrachnidia) from Turkey
Esen, Yunus; Pešić, Vladimir; Erman, Orhan; Kaya, Yücel
In this study, the findings of three water mite species of the family Hygrobatidae collected from different streams in Turkey were evaluated. Hygrobates (s. str.) anatolicus Esen & Pešić, sp. n. is described as new for science. Hygrobates (Rivobates) diversiporus Sokolow, 1927 and Atractides (s. str.) nikooae Pešić, 2004, which were illustrated and thoroughly discussed, are new records for the Turkish fauna.
AtıfScopus9WoS6OpenAlex8İncele - MakaleAçık Erişim2013Scopus SJRQ4Analysis of amplitude and slope diffraction coefficients
Tabakcioglu, Mehmet Bariş; Cansiz, Ahmet
The diffraction mechanism is used for field prediction in both light and shadowed regions. Slope and amplitude diffraction coefficients are vital to predict the field strength at the receiver accurately. In this paper, amplitude and slope diffraction coefficients for one of the ray theoretical models, the slope uniform theory of diffraction with convex hull (S-UTD-CH) model, are analyzed. Moreover, diffraction coefficients are given for knife-edge and wedge structures.
- MakaleAçık Erişim2013Scopus SJRQ1Comparison of the effects of different types of tube inserts on two-phase flow instabilities
Omeroglu, Gokhan; Çomaklý, Omer; Karagoz, Sendogan; Karsli, Suleyman
Turbulence promoting inner elements such as rings, wings or winglets, twisted tapes, etc., is widely used in single- and two-phase flows. In this experimental work, the two-phase flow instabilities of forced convection boiling in a horizontal tube with ring- and twisted-tape-type inner elements inside are investigated. In order to analyze the two-phase flow of water, the experiments were conducted under a constant system pressure of 7.5 bar, and a constant heat input of 24 kW was applied to the outer surface of the circular test pipe with constant exit restriction. Three different inlet temperatures (Ti = 15, 25, and 35°C) were used to see the effect of inlet sub-cooling, and the mass flow rate was decreased from 110 to 20 g/s to obtain the characteristic curve. Two different pitch ratios for both the ring and twisted tape were evaluated in terms of stability. The results were evaluated in terms of appropriate variables for both the tube with insertions and the smooth tube. The analysis shows that the pressure drop increases with decreasing mass flow rate for all cases. The presence of the inner elements in the test pipe causes the boundaries of the oscillations to narrow in comparison with smooth tube. On the other hand, with the increase in the effective diameter of the test pipe the boundaries of the oscillations broaden. For each type of insertion, the increase of the pitch ratio makes the system less stable.
AtıfScopus4WoS3OpenAlex6İncele - MakaleYalnız künye2013Scopus SJRQ2Determination of structural, spectrometric and nonlinear optical features of 2-(4-hydroxyphenylazo)benzoic acid by experimental techniques and quantum chemical calculations
Cinar, Mehmet; Yildiz, Nihat; Karabacak, Mehmet; Kurt, Mustafa
The optimized geometrical structure, vibrational and electronic transitions, chemical shifts and nonlinear optical properties of 2-(4-hydroxyphenylazo)benzoic acid (HABA) compound were presented in this study. The ground state geometrical structure and vibrational wavenumbers were carried out by using density functional (DFT/B3LYP) method with 6-311++G(d,p) basis set. The vibrational spectra of title compound were recorded in solid state with FT-IR and FT-Raman spectrometry in the range of 4000-400 cm-1 and 4000-10 cm-1; respectively. The fundamental assignments were done on the basis of the recorded spectra and total energy distribution (TED) of the vibrational modes. The 1H and 13C NMR spectra were recorded in deuterated DMSO solution, and gauge-invariant atomic orbitals (GIAOs) method was used to predict the isotropic chemical shifts. The UV-Vis absorption spectra of the compound were observed in the range of 200-800 nm in ethanol, methanol and water solvents. To investigate the nonlinear optical properties, the polarizability, anisotropy of polarizability and molecular first hyperpolarizability were computed. A detailed description of spectroscopic behaviors of compound was given based on the comparison of experimental measurements and theoretical computations.
AtıfScopus19WoS19OpenAlex19İncele - MakaleYalnız künye2013Scopus SJRQ3Application of carrier element free coprecipitation (CEFC) method for determination of Co(II), Cu(II) and Ni(II) ions in food and water samples
Serencam, Huseyin; Duran, Celal; Ozdes, Duygu; Bektas, Hakan
A simple and highly sensitive separation and preconcentration procedure, which has minimal impact on the environment, has been developed. The procedure is based on the carrier element free coprecipitation (CEFC) of Co(II), Cu(II), and Ni(II) ions by using 2-{4-[2-(1H-indol-3-yl)ethyl]-3-(4-methylbenzyl)-5-oxo- 4,5-dihydro-1H-1,2,4-triazol- 1-yl}-N'-(pyridin-2-yl methylidene)acetohydrazide (IMOTPA), as an organic coprecipitant. The levels of analyte ions were determined by flame atomic absorption spectrometry (FAAS). The detection limits for Co(II), Cu(II) and Ni(II) ions were found to be 0.40, 0.16 and 0.17 μg L-1, respectively, and the relative standard deviations for the analyte ions were lower than 3.0%. Spike tests and certified reference material analyses were performed to validate the method. The method was successfully applied for the determination of Co(II), Cu(II) and Ni(II) ions levels in sea and stream water as liquid samples and red pepper, black pepper, and peppermint as solid samples.
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