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Diyarbakr, Turkey

Dicle University is a public university located on eastern side of the Tigris river. The university is one of the oldest and largest higher education institutions in southeastern Anatolia, Turkey.Built on a twenty-seven-thousand-acre area in the eastern side of the historical city of Diyarbakır, Dicle University takes its name from the river which splits the university from the city. Apart from its main campus in Diyarbakır, the university has vocational schools in counties like Ergani, Çermik, Çüngüş, Bismil, and Silvan. Wikipedia.


Ocak Y.S.,Dicle University
Journal of Alloys and Compounds | Year: 2012

ZnO thin films were formed on a p-Si semiconductor and a glass by DC sputtering technique. The ZnO films were analyzed using UV-vis spectroscopy and X-ray diffraction (XRD). Electrical and photoelectrical parameters of ZnO/p-Si heterojunction were determined by current-voltage (I-V), capacitance-voltage (C-V) and capacitance-frequency (C-f) of the device in dark and under the light with 100 mW/cm 2 and AM 1.5 illumination property. The device had a good rectifying property with 1.35 ideality factor, 0.76 eV barrier height and 6.69 kΩ series resistance values. It was seen that I-V, C-V and C-f measurements of the heterojunction had good sensitivity to the light and the device behaves as a photodiode and a photocapacitor. © 2011 Elsevier B.V. All rights reserved.


Ozer S.Y.,Dicle University
Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology | Year: 2011

Objective The purpose of this study was to compare the shaping ability (apical transportation and straightening) of 3 nickel-titanium rotary instruments (ProTaper Universal, Hero 642 Apical, FlexMaster) with noncutting tips in curved root canals of extracted human teeth using cone beam computed tomography (CBCT). Study design Sixty mesiobuccal root canals of maxillary molars with curvatures of 25° to 47° were equally divided into 3 groups and embedded in silicone impression material. The root canals were scanned using CBCT (Next Generation i-CAT) and after scanning working length was determined with a hand file to preserve the original curvature. After preparation, teeth were placed into their original positions on the silicone impression material and postinstrumentation scans were performed using the same parameters (4-cm field of view at 0.125-mm voxel). Pre- and postinstrumentation images obtained from root cross-sections located 2, 3, and 4 mm above the apical foramen were compared using Adobe Photoshop software. Transportation was measured by superimposition of final and initial images. Any distance (mm) between prepared and anatomic canal centers was defined as apical transportation. Canal curvatures were measured before and after instrumentation using computed tomography and images were exported to ImageJ software. Differences in the degree and radius of curvature were regarded as straightening. Data were analyzed by ANOVA. Results Mean transportation values were 0.10 ± 0.03 mm for ProTaper Universal, 0.09 ± 0.03 mm for Hero 642 Apical, and 0.07 ± 0.02 mm for FlexMaster, and the differences were not significant. Mean values for straightening among the groups were not significantly different (P > .05). The performances of all instruments were similar. Conclusion Apical transportation occurred with all the instruments despite their noncutting tips. © 2011 Mosby, Inc. All rights reserved.


Ozler A.,Dicle University
European review for medical and pharmacological sciences | Year: 2012

There are many studies evaluating the role of inflammation in the pathogenesis of preeclampsia. However, little is known about the relationship between the severity of inflammation and the severity of preeclampsia due to insufficient of studies reporting this matter. To investigate the maternal serum concentrations of IL-6, TNF-alpha and Neopterin in patients with mild preeclampsia and severe preeclampsia and HELLP (hemolysis, elevated liver enzymes, low platelet count) syndrome in preeclampsia and determine their association with the severity of the disease. Patients, hospitalized with the diagnosis of preeclampsia between October 2011 and March 2012, were included in the study. The patients with preeclampsia were divided into three groups as mild preeclampsia, severe preeclampsia and HELLP syndrome. The control group was comprised of normotensive and uncomplicated pregnant women. The serum levels of IL-6, TNF-alpha and Neopterin (NEO) were determined, using enzyme-linked immunosorbent assay. Spearman's rank correlation tests were used for the correlations between the serum levels of inflammatory markers and the severity of preeclampsia. There was no observed significant difference among mean serum TNF-alpha and IL-6 levels of four groups (p > 0.05). The median serum concentration of NEO in subjects with mild preeclampsia of 14.1 nmol/L and severe preeclampsia of 14.8 nmol/L was significantly higher than that of 10.3 nmol/L in normotensive controls (p = 0.013; p = 0.000 respectively). In addition, the median serum concentration of NEO was detected to be highest in subjects with HELLP syndrome. The serum levels of NEO was well correlated with the severity of preeclampsia (r = 0.533, p = 0.000). The serum levels of NEO, an important marker of cellular immunity, associated with severity of disease in patients with preeclampsia.


Karakus A.,Dicle University
Construction and Building Materials | Year: 2011

Stone Mastic Asphalt (SMA) improved for road construction which has been utilized in Europe and America for 40 years is a rather new process in Turkey. SMA basically consists of 93-94% aggregate and mineral fillers, 6-7% bitumen and additives. Road and construction industry consume stone in large amounts. Stone used are obtained from nearby quarries and carried to the location where they are to be used, destroying the nature and causing large costs. The constantly increasing demand on quarries harms the general structure of the earth thus causing the emergence of large scale environmental problems. The use of basalt waste from stone processing plants as aggregates and mineral filler in SMA might help to meet this increasing demand thus solving environmental problems. In this study, primarily some important material properties of fine and coarse basalt waste, taken from basalt processing plants in Diyarbakir, such as sieve analysis, chemical analysis, specific gravity, water absorption, Los Angeles abrasion loss value, soundness of aggregate by Na2SO4, flakiness index and stripping strength were determined. Then by using this waste material, a SMA was designed according to Turkish Highway Technical Specifications. Marshall stability and flow tests have been carried out on designed SMA specimens. Test results indicate that properties of the basalt waste and the SMA produced were within the specified limits and that these waste materials can be used as aggregates and mineral filler in SMA. © 2011 Elsevier Ltd. All rights reserved.


Salti M.,Dicle University
International Journal of Theoretical Physics | Year: 2013

The main goal of the present work is to investigate the validity of the second law of gravitational thermodynamics in an expanding Gödel-type universe filled with generalized Chaplygin gas interacting with cold dark matter. By assuming the Universe as a thermodynamical system bounded by the apparent horizon, and calculating separately the entropy variation for generalized Chaplygin gas, cold dark matter and for the horizon itself, we obtained an expression for the time derivative of the total entropy. We conclude that the 2nd law of gravitational thermodynamics is conditionally valid in the cosmological scenario where the generalized Chaplygin gas interacts with cold dark matter. © 2013 Springer Science+Business Media New York.

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