Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Pat, Suat(8)
- Özen, Soner(8)
- Agar, Guleray(6)
- Akkus, B.(6)
- Kizil, Hamit Emre(6)
- Ozdamli, F(6)
- Uzunboylu, H(6)
- Akdemir, A.O.(5)
- Ayberkin, Doruk(5)
- Dadasoglu, F.(5)
- Dertli, Enes(5)
- Dogan, G.S.(5)
- Ekinci, A.(5)
- Han, I.(5)
- Kanbul, S(5)
- Karagoz, K.(5)
- Karahoca, A(5)
- Korkmaz, Şadan(5)
- Oktem, Y.(5)
- Oztekin, A.(5)
- Set, E.(5)
- Tabakcioglu, Mehmet Baris(5)
- Şenay, Volkan(5)
- Akcamete, G(4)
- Anar, Mustafa(4)
- Babadoan, C(4)
- Chova, LG(4)
- Kaban, Guzin(4)
- Kahraman, Sakip(4)
- Karaali, R.(4)
- Kaya, Mukerrem(4)
- Martinez, AL(4)
- Mutlu, R.B.C.(4)
- Oulmu, S(4)
- Torres, IC(4)
- Yalcin, L.S.(4)
- Allm, Bünyamin(3)
- Caliskan, H(3)
- Guler, Evrim(3)
- Gürses, Ahmet(3)
Yayınlar
- BildiriÖn baskısı açık2015Application of of Ray Tracing Technique into S-UTD-CH Model
Tabakcioglu, Mehmet Baris; Ayberkin, Doruk
To make higher accuracy predictions having less computation complexity, lower computation time, a lot of electromagnetic wave propagation models are developed. These models are classified into two classes, ray tracing based and numerical models. Computation complexity, computation time and accuracy of prediction of numerical model are high. On the contrary, computation complexity and computation time of ray tracing based model is lower. There is a tradeoff between computation time and accuracy. To predict the relative path loss at the receiver accurately, all ray paths have to be determined. In this study, after giving some brief information about some ray tracing based propagation models ray tracing software will be explained.
AtıfWoS1
İncele - BildiriYalnız künye2015Scopus SJRQ3Removal of Reactive Black 5 from wastewater using natural clinoptilolite modified with apolaccase
Nadaroglu, Hayrunnisa; Kalkan, Ekrem; Celebi, Neslihan; Tasgin, Esen
In this study, a clinoptilolite modified with apolaccase was used to adsorb Reactive Black 5 (RB5) dye from aqueous solution using the batch procedure. The influences of pH, contact time, temperature and absorbent dosage on the adsorption were investigated. The optimum adsorption was obtained at pH = 6, contact time = 60 min, temperature = 25 degrees C and adsorbent dosages of 1.62 and 1.59 mg/50 mL per gram of clinoptilolite and of apolaccase-modified clinoptilolite (LMC), respectively). The adsorption experimental data fitted both the Langmuir and Freundlich isotherm models well. In addition, pseudo-first-order and pseudo-second-order kinetics were used to study the kinetics of RB5 dye adsorption onto natural clinoptilolite and LMC. Adsorption appears to follow pseudo-second-order kinetics with a high correlation coefficient. Thermodynamic parameters such as changes in the free energy (Delta G degrees), enthalpy (Delta H degrees) and entropy (Delta S degrees) of adsorption were calculated. The thermodynamic parameters indicate that the adsorption of RB5 dye onto LMC was less spontaneous, feasible and endothermic. The LMC can be used as an alternative low-cost adsorbent for the dye removal from aqueous solutions.
AtıfWoS8OpenAlex8İncele - BildiriÖn baskısı açık2015Building Parameter Analysis with S-UTD-CH model in Multiple Diffraction
Tabakcioglu, Mehmet Baris; Ayberkin, Doruk
Electromagnetic wave propagation models are used in radio planning tool and coverage prediction. These models are based on ray tracing technique or numerical. Slope UTD with convex hull model is a model which has less computation time, higher accuracy of prediction and based on ray tracing technique. S-UTD-CH model is used in multiple diffraction due to that this model gives more accurate results in less computation time. Obstacles can be modelled as knife edge, wedge or cylinder in ultra-high frequencies. inner angle, structure type and relative permittivity constant and conductivity of obstacle and polarization type of electromagnetic wave change the relative path loss at the receiver. In the study, how building parameter changes the relative path loss is discussed.
- BildiriYalnız künye2015DIRECT AND FAST GROWTH OF A SI:GAAS THIN FILM BY MEANS OF THERMIONIC VACUUM ARC (TVA)
Senay, Volkan; Özen, Soner; Pat, Suat; Korkmaz, Sadan
AtıfWoS2İncele - BildiriYalnız künye2015MO DOPED GAN THIN FILM GROWTH USING THERMIONIC VACUUM ARC (TVA)
Özen, Soner; Pat, Suat; Korkmaz, Sadan; Senay, Volkan
AtıfWoS1İncele - BildiriYalnız künye2015SOLID STATE BATTERY MANUFACTURING WITH THERMIONIC VACUUM ARC AND RF SPUTTERING
Pat, Suat; Özen, Soner; Senay, Volkan; Korkmaz, Sadan; Pat, Zerrin
AtıfWoS1İncele - BildiriYalnız künye2015Evaluation of electromagnetic interference emitted from compact fluorescent lamps according to CISPR-15
Kocakusak, A.; Cakir, M.; Yalcin, S.; Ozen, S.; Helhel, S.
In this study, Electromagnetic interference (EMI) emitted by the compact fluorescent lamps (CFL) having biggest pie in the market has been investigated according to CISPR-15. Emissions of CFLs vary depending on trademark, since some cannot provide the requirements of CISPR-15 standards such that they act as contaminants in the electric supply system. Conducted analysis considering the limits of CISPR-15 at 150-500 kHz frequency brings out that the effect of CFL produced by Company A at 181.298 kHz is 83.94 dBμV, whereas the effect of CFL produced by Company D at 173.593kHz frequency is 49,92dBμV, respectively. Obtained results are out of CISPR-15 limits of 66-56 dBμV.
AtıfScopus2
İncele - BildiriAçık Erişim2015Scopus SJRQ3Investigation of an alternative fuel for diesel engines
Keven, A.; Karaali, R.
Internal combustion engines use generally fossil fuel products. World resources of it is limited. Renewable alternative energy sources are getting important solution for energy demand. Hazelnut oil ethyl ester is obtained from raw hazelnut and mixed with diesel oil in certain proportions to use in a four-stroke direct injected single cylinder diesel engine. In this study the effects of the mixture of diesel oil with hazelnut oil ethyl ester on the engine performance and exhaust gas emissions are investigated for the first time in literature. The fuel injection system is regulated to use the mixture in the engine for the investigation. The results show that, the mixture with 25% ethyl ester extracted from hazelnut oil can be used as an alternative fuel without any change or regulation of the diesel engine.
AtıfScopus7WoS3OpenAlex7İncele - BildiriAçık Erişim2015Scopus SJRQ3Thermoeconomic analyses of steam injected gas turbine cogeneration cycles
Karaali, R.; Öztürk, I.T.
In this study, three different gas turbine cogeneration systems that are preheating air, preheating air-fuel and simple cycles where steam injected in to combustion chamber are analyzed. The effects of steam injection on thermoeconomic performance are calculated and obtained. By using the first law of thermodynamics, the exergy analysis and economic methods, simulation programs written by the authors in FORTRAN code are obtained to use for the analyses. Thermoeconomic performance of these three different cycles for different stage and variable mass of injected steam are obtained and compared with literature. The effects of injection steam in to combustion chambers of those three cycles for variable compressing ratios, on power, efficiencies, product price and performances are obtained. Consequently, the advantages and the disadvantages of injection steam are evaluated. The results obtained in this study are compared with the results available in the literature. Injection steam into combustion chamber increases the electricity efficiency and electricity power but decreases the heat power of the cycles. Also the produced electricity price for per kWh is increasing.
AtıfScopus15WoS12OpenAlex18İncele - BildiriAçık Erişim2015Scopus SJRQ3Soil stabilization with using waste materials against freezing thawing effect
Yilmaz, F.; Kamiloʇlu, H.A.; Şadoʇlu, E.
Freezing-thawing processes hapenning in seasonally cold climate cause deformation of soil in time of freezing and strength loss while thawing. Problems of ground frost heave and soil softening belong to the important factors, that could cause serious damage and financial loss. Bayburt tuff and tuffites known as Bayburt Stone mines, located around Bayburt, play important role on economy of the Bayburt city. As a result of researches in 2005 total of 2 535 700 tons proved reserve were determined several places in Bayburt. The goal of this study is proving, that deposits of Green Bayburt Stone wastes, created in the stone quarries during the stone processing, can be used as a stabilizing material. By recycling the waste material rejected stone was mixed with lime and used as a soil stabilizator against freezing-thawing effect. Prepared natural and stabilized soil samples were subjected to freezing-thawing cycles after curing for 28 days. After the freezing-thawing cycles, compressive strength of the samples was measured to investigate the influence of the additives on the freezing-thawing properties of soil samples. As a result of this study, it was determined that samples stabilized with Green Bayburt Stone mixtures have high freezing-thawing durability as compared to unstabilized samples. As a consequence, it was seen that those mixtures can be successfully used as an additive material to enhance the freezing-thawing effects of cohessive soils.
AtıfScopus25WoS23OpenAlex28İncele - BildiriAçık Erişim2014Scopus SJRQ1The determination of antioxidative effect and anticancer potential of vulpinic acid
Anar, Mustafa; Kizil, Hamit Emre; Agar, Guleray
AtıfOpenAlex1İncele - BildiriAçık Erişim2014Scopus SJRQ1Cytotoxic and antiproliferative effects of evernic acid on HeLa cell lines: A candidate anticancer drug
Kizil, Hamit Emre; Agar, Guleray; Anar, Mustafa
AtıfWoS6OpenAlex10İncele - BildiriAçık Erişim2014Evaluation of Prospective Teachers and Practice Classroom Teachers Opinions of problems Encountered in Practice Schools (Bayburt University sample)
Öksüz, Yucel; Çevik, Ceren; Laborda, JC; Ozdamli, F; Maasoglu, Y
In this study, prospective teachers' and practice classroom teachers' opinions on the problems encountered during the schoolteaching practice class in the practice schools have been examined. The study has been conducted with 125 senior prospective teachers at B. U. Education Faculty, Primary Education, Primary School Teaching Department, and 21 practice classroom teachers that work at practice schools. The present study is case study, one of the qualitative researches. The data about the opinions of the prospective teachers and the practice classroom teachers were collected through the 'Interview form' developed by the researchers, and 'Practice Teacher Proficiency Scale' that was developed by Kiraz (2003) in order to find out the prospective teachers' views regarding the practice classroom teachers. Besides, 18 students who were willing have been interviewed. The data obtained out of the interview forms were analyzed with the help of descriptive statistics; the data obtained out of the interviews were analyzed with the help of qualitative data analysis techniques; and the data gathered out of the scale were analyzed with the help of SPSS 18.0 statistics packet. In line with the findings, some suggestions towards the classroom teaching education and the applications in primary schools have been presented. (C) 2013 The Authors. Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Academic World Education and Research Center.
AtıfWoS1OpenAlex4İncele - BildiriAçık Erişim2014The Comparison of The Wrestlers' Status of Some Physical, Physiological and Growth Hormone Status After Resting, Competition and Sauna Sessions
Kiyici, F.; Ucan, I.; Laborda, JC; Ozdamli, F; Maasoglu, Y
The aim of this study is to compare some of the physical, physiological, and growth hormone status during the resting, training and after the sauna sessions (80-100 degrees C and 10-15 % humidity) for wrestlers. Blood samples, for Growth Hormone (GH) were taken and stored during resting time, before breakfast in the morning, after training and the completion of sauna sessions. According to the results of the study; in body temperature and during resting and after training and sauna sessions (p<0.01), in the number of heart beats (NOV), both between resting status and training, sauna sessions and between training and sauna sessions (p<0.01), in reaction time (with right and left hand) both between resting status and training, and between training and sauna sessions (p<0.01), in GH both between resting time and sauna sessions, and between training and sauna sessions, results were stated statistically significant (p<0.01). (C) 2013 The Authors. Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Academic World Education and Research Center.
AtıfOpenAlex1İncele - BildiriAçık Erişim2014Developing a belief scale according to using computer technology in mathematics teaching
Yilmaz, Gul Kaleli; Besoluk, S
This study's aim is to develop a valid and reliable evaluation instrument to define the believes according to using technology in mathematical teaching. The sample is formed with 216 candidate teachers. While forming a scale those steps are followed having item tool, taking expert opinion, implementation, computing validity and reliability, finalizing the scale. At the end of the analysis scale is formed with 31 items, four factors and four factors' variance ratios are %44. Cronbach Alpha internal integrity coefficient is calculated as 0.895 for the whole scale. In line with findings the belief scale according to using computer technology in mathematics teaching is improved and it is decided as a valid and reliable evaluation instrument. (C) 2014 The Authors. Published by Elsevier Ltd.
AtıfWoS1OpenAlex2İncele - BildiriAçık Erişim2014Scopus SJRQ1Catalase positive cocci and volatile compounds in fermented sausages
Kamiloglu, Aybike; Sayin, Bilge; Kaban, Guzin; Kaya, Mukerrem
- BildiriAçık Erişim2014Scopus SJRQ1Probiotic meat products
Sayin, Bilge; Kamiloglu, Aybike; Kaya, Mukerrem; Kaban, Guzin
AtıfOpenAlex1İncele - BildiriAçık Erişim2014Investigation of Pre-service Science Teachers' Self-efficacy Beliefs of Science Teaching
Kahraman, Sakip; Yilmaz, Zeynel Abidin; Bayrak, Ramis; Gunes, Kubra; Ulvydiene, L; Rahimi, A
The scope of the study is to investigate the pre-service science teachers' self-efficacy beliefs of science teaching with respect to gender and grade level. Using the survey approach, the data of the study were gathered from 114 pre-service science teachers enrolled in the Faculty of Education at two universities in Turkey. The data was collected using a likert type scale, science teaching self-efficacy belief scale with 23 items, originally developed by Enochs-Riggs (1990). Variance analyses (two-way ANOVA) was performed on the collected data to reveal whether there are significant differences in science teacher candidates' self-efficacy beliefs of science teaching according to grade level and gender. The results of analysis showed that there was no statistically significant difference in pre-service science teachers' self-efficacy beliefs of science teaching with respect to both gender and grade level. (C) 2014 The Authors. Published by Elsevier Ltd.
AtıfWoS3OpenAlex16İncele - BildiriAçık Erişim2014Primary School Teacher Candidates' Offers to Primary School Students About Environmental Consciousness
Bozdemir, Hafife; Kodan, Hulya; Akdas, Hatice Betul; Uzunboylu, H
This study aims to determine the suggestions of primary school teaching final year students in regard to the introduction of environmental consciousness. A quantitative research approach was adopted in the present study conducted with 73 students receiving education at the Department of Primary School Teaching at Kastamonu University Faculty of Education. The data were collected by a semi-structured interview form developed by the researchers. The obtained data were presented in percentages and frequencies tables. The views of the fourth grade students of department of primary school teaching concerning the effective factors for introducing environmental consciousness, leading topics, methods and techniques to be used, assessment and evaluation techniques to be employed, activities, influential courses, sufficiency of subjects about environment in primary education curriculum, and whether there is a need for a separate environment course were determined. (C) 2014 Elsevier Ltd.
AtıfOpenAlex3İncele - BildiriYalnız künye2014Application of S-UTD-CH model into multiple diffraction scenarios at 900MHz
Tabakcioglu, Mehmet Baris; Ayberkin, Doruk
In this study, propagation prediction models based on ray tracing in coverage estimation for broadcasting systems are compared with respect to computation time and accuracy. Uniform Theory of Diffraction (UTD), Slope Diffraction (S-UTD) and Slope UTD with Convex Hull (S-UTD-CH) models are compared for computation time and propagation path loss. Moreover in this study, effects of transmitter height to relative path loss at the receiver are analyzed. S-UTD-CH model is optimum model with respect to computation time and relative path loss.