Krklareli, Turkey
Krklareli, Turkey

The Kırklareli University was founded at 2007 under the administration of the Trakya University Rectorate Enver Duran. The University is based on a strong background of the Faculty of Engineering, built at 1992. The University has four faculties, two institutes, seven vocational schools and a school of health, with nearly 10000 students, more than 300 academic and 200 administrative staff. The University is a member of the Balkan Universities Network. Wikipedia.

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Dursun B.,Kirklareli University | Alboyaci B.,Kocaeli University
Renewable and Sustainable Energy Reviews | Year: 2010

Renewable energy resources have played an important role to meet increasing energy demand in the world. Among the renewable energy resources, especially, wind energy is of interest due to some advantages, such as being clean, environmental friendly etc. However, the intermittent nature of wind creates several problems to the power system operation and new approaches based on the combined use of wind power and energy storage technologies need to be developed. One of these combined systems is wind-hydro pumped storage systems. In this paper, hydropower and wind energy potential of Turkey are investigated in details. Besides, the importance and the necessity of wind-hydro pumped storage systems for Turkey are comprehensively examined and finally, the contribution of wind-hydro pumped storage systems is emphasized in meeting Turkey's electric energy demand. Crown Copyright © 2010 Elsevier Ltd. All rights reserved.

Gorgulu S.,Kirklareli University | Ekren N.,Marmara University
Energy and Buildings | Year: 2013

Approximately, 20% of the electricity consumed in the world is spent for lighting. More efficient utilization of the sun, as a natural source of light, for lighting would save electricity used for lighting. The aim of this study is to illuminate a windowless room via a light-pipe and dimmable electronic ballasts. Light-pipe is used for the illumination of the space during the daytime. In case of inadequate daylight, artificial lighting is made via dimmable electronic ballasts and fluorescence lamps. Artificial lighting is supervised by a fuzzy logic control system to keep the illumination level at 350 lux. When there is a motion in the room, the system works with the message of the motion sensor, which, thereby, enables energy saving. Additionally, dimming the lamps result in conversation of the electrical energy used for illumination. After the experimental studies, 350 lux value targeted in the work plane is achieved with ±10 lux error. © 2013 Elsevier B.V.

In this study, it was achieved by using the method of impulse noise to detect internal or surface cracks that can occur in the production of ceramic plates. Ceramic materials are often used in the industry, especially as kitchenware and in areas such as the construction sector. Many different methods are used in the quality assurance processes of ceramic materials. In this study, the impact noise method was examined. This method is a test technique that was not used in applications. The method is presented as an examination technique based on whether there is a deformation on the material according to the sound coming from it as a result of a plastic bit hammer impact on the ceramic material. The application of the study was performed on plates made of ceramic materials. Here, it was made with the same type of model plates manufactured from the same material. The noise that would occur as a result of the impact applied on a point determined on the materials to be tested has been examined by the method of time-frequency analysis. The method applied gives pretty good results for distinguishing ceramic plates in good condition from those which are cracked.

Bozdogan K.B.,Kirklareli University
Structural Engineering and Mechanics | Year: 2013

In this study, the modified finite element-transfer matrix methods are proposed for free vibration analysis of asymmetric structures, the bearing system of which consists of shear wall-frames. In the study, a multi-storey structure is divided into as many elements as the number of storeys and storey masses are influenced as separated at alignments of storeys. The shear walls and frames are assumed to be flexural and shear cantilever beam structures. The storey stiffness matrix is obtained by formulating the governing equation at the center of mass for the shear walls and the frames in the floor. The system transfer matrix is constructed in the dimension of 6×6 by transforming the obtained stiffness matrix. Thus, the dimension, which is 12n×12n in classical finite elements, is reduced to the dimension of 6×6. To study the suitability of the method, the results are assessed by solving two examples taken from the literature.

Dursun B.,Kirklareli University | Gokcol C.,Kirklareli University
Renewable Energy | Year: 2011

Turkey is a rapidly growing country regarding its economy and population and therefore has a large and continuously increasing energy demand. Turkey mostly meets its energy demand from imported fossil sources. However apart from petroleum and natural gas, Turkey has almost all kinds of energy resources and hence it would not need to meet its energy demand through import. In addition, Turkey has very large potential of hydraulic energy but to date only one-third of this significant economical potential could be used. This ratio seems insufficient when compared with that of European countries.In this paper the role of hydroelectric power, its potential and its present status are investigated in detail for Turkey. Especially the small scale hydropower plant is emphasized as Turkey's renewable energy source. Furthermore the water resources of Turkey are examined. © 2010 Elsevier Ltd.

Ulukoca N.,Kirklareli University
International Journal of Public Health | Year: 2010

Objectives: The aim of this article was to determine risk factors for postpartum depression in low-socioeconomic level women during the first postpartum year and to determine the relationship between postpartum depression symptoms and social support. Methods: This is a cross-sectional study. Data were collected through administration of a questionnaire, the Edinburgh Postnatal Depression Scale (EPDS) and the Multidimensional Scale of Perceived Social Support (MSPSS). Data were analyzed utilizing unpaired t test, one-way analysis of variance, and logistic regression analysis. Results: The prevalence of perceived symptoms of postpartum depression was 21.0% (scores of C13) and there was a correlation (r = -0.36, p = 0.000) between MSPSS and EPDS scores. The mean EPDS score was 8.36 ± 5.6 while the mean MSPSS score was 64.49 ± 15.2. Conclusion: Postpartum depression symptoms are common among Turkish women. These findings provide important information about the role of social support related to postpartum depressive symptoms among Turkish women. Informing health professionals about these issues is an important step towards improving maternal and child health care services. © Swiss School of Public Health 2010.

Akozcan S.,Kirklareli University
Journal of Environmental Radioactivity | Year: 2012

Natural and artificial radionuclide pollutants of the marine environment have been recognized as a serious environmental concern. The natural radioactivity activity concentrations of 226Ra, 238U, 232Th and 40K were measured by gamma spectrometry in sediment samples collected from two different areas in Aegean Sea Turkish Coast. There is no information about radioactivity level in the study areas sediments so far. The results showed that the concentrations of activity in the sediment samples are 9 ± 0.6 Bq kg-1-12 ± 0.7 Bq kg-1, 7 ± 0.4 Bq kg-1-16 ± 1.0 Bq kg-1, 6 ± 0.3 Bq kg-1-16 ± 1.0 Bq kg-1 and 250 ± 13 Bq kg-1-665 ± 33 Bq kg-1 for 226Ra, 238U, 232Th and 40K, respectively. In general, the distribution of activity concentrations along the coast of the Aegean Sea area were in the same order as international levels. © 2012 Elsevier Ltd.

Dursun B.,Kirklareli University
Renewable and Sustainable Energy Reviews | Year: 2012

This study is to search for possibilities of supplying the load demand of Kavakli campus of Kirklareli University with solar energy and the fuel cell power generating system (electrolyzer/hydrogen tank/fuel cell) by using the HOMER software due to the fact that hybrid power systems with renewables can significantly reduce emissions which are caused by utilization of non-renewable power sources. In this study, various hybrid systems will be examined and compared among themselves considering cost of energy (COE), renewable fraction, total net present cost (NPC) and hydrogen production. Additionally, this study will seek whether a fuel cell can be integrated into the hybrid systems. According to the study results, the grid connected systems appear cost-effective as expected. Although the grid-connected photovoltaic (PV) hybrid system has the lowest COE and NPC, the grid-connected PV/fuel cell hybrid system with COE, 0.294$/kWh has a slightly higher cost than the optimum one. It is strongly believed that this system may be chosen because it is a cleaner system and its emissions are fairly low. © 2012 Elsevier Ltd.

Concentrations of 210Po were determined in the edible muscle tissue of five species of marine fish: Sardine (Sardine plichardus) and Anchovy (Engraulis encrasicolus), Red mullet (Mullus barbatus), Horse mackerel (Trachurus trachurus) and Gilt-head sea bream (Sparus aurata) collected from five stations in the Aegean Sea Region of Turkey during the fishery season 2010. The 210Po concentrations in the fish samples were found to vary from not detected levels to 389 ± 45 Bq kg-1 dry wt. These variations in 210Po content in different species are probably due to differences in metabolism and feeding patterns. The highest levels for 210Po were observed in Anchovy (E. encrasicolus) species. © 2012 Elsevier Ltd.

Tasgin M.E.,Kirklareli University
Nanoscale | Year: 2013

We investigate the dynamics of a plasmonic oscillation over a metal nanoparticle when it is strongly coupled to a quantum emitter (e.g. quantum dot, molecule). We simulate the density matrix evolution for a simple model, a coupled classical-quantum oscillators system. We show that the lifetime of the plasmonic oscillations can be increased several orders of magnitude, up to the decay time of the quantum emitter. This effect shows itself as the narrowing of the plasmon emission band in the spaser (surface plasmon amplification by the stimulated emission of radiation) experiment [Nature, 2009, 460, 1110], where a gold nanoparticle interacts with the surrounding molecules. Enhancement of the plasmonic excitation lifetime enables stimulated emission to overcome the spontaneous one. The enhancement occurs due to the emergence of a phenomenon analogous to electromagnetically induced transparency (EIT). The effect can find applications in many areas of nanoscale physics, such as in quantum information with plasmons and in increasing solar cell efficiency. © 2013 The Royal Society of Chemistry.

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