Celal Bayar University

About: Celal Bayar University is a education organization based out in Magnesia ad Sipylum, Turkey. It is known for research contribution in the topics: Population & Heat transfer. The organization has 2960 authors who have published 6024 publications receiving 100646 citations.

Angular analysis of the B-0 -> K*(0) e(+) e(-) decay in the low-q(2) region

Abstract: An angular analysis of the B0 → K*0e+e− decay is performed using a data sample, corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV during 2011 and 2012. For the first time several observables are measured in the dielectron mass squared (q2) interval between 0.002 and 1.120 GeV2/c4. The angular observables FL and A T Re which are related to the K*0 polarisation and to the lepton forward-backward asymmetry, are measured to be FL = 0.16 ± 0.06 ± 0.03 and A T Re = 0.10 ± 0.18 ± 0.05, where the first uncertainty is statistical and the second systematic. The angular observables A T (2) and A T Im which are sensitive to the photon polarisation in this q2 range, are found to be A T (2) = − 0.23 ± 0.23 ± 0.05 and A T Im = 0.14 ± 0.22 ± 0.05. The results are consistent with Standard Model predictions.

Public attitudes to depression in urban Turkey: The influence of perceptions and causal attributions on social distance towards individuals suffering from depression

Abstract: The aim of this study was to determine public attitudes towards patients with depression and the influence of perception and causal attributions on social distance towards individuals suffering from depression in urban areas. This study was carried out with a representative sample in Istanbul which is the biggest metropolis in Turkey. Seven hundred and seven subjects completed the public survey form which consisted of ten items screening the demographic features and health status of the participants, and 32 items rating attitudes towards depression. The respondents’ attitudes towards depression were very negative and nearly half of the subjects perceived people with depression as dangerous. More than half of the subjects stated that they would not marry a person with depression, and nearly half of the subjects stated that they would not rent their house to a person with depression. One-quarter of the subjects stated that depressive patients should not be free in the community. The subjects who considered depression as a disease and who believed that weakness of personality and social problems cause depression had negative attitudes towards depression. In Istanbul, people recognise depression well, but their attitudes towards it are fairly negative. The urban public has unfavourable attitudes towards depression and a tendency to isolate patients from the society. Notwithstanding the high prevalence, there is still considerable stigmatisation associated with depression.

A new efficient method for solving delay differential equations and a comparison with other methods

Abstract: In this paper, a new analytical technique, namely the optimal perturbation iteration method, is presented and applied to delay differential equations to find an efficient algorithm for their approximate solutions. Effectiveness of this method is tested by various examples of linear and nonlinear problems of delay differential equations. Obtained results reveal that optimal perturbation iteration algorithm is very effective, easy to use and simple to perform.

Ischaemic preconditioning reduces spinal cord injury in transient ischaemia.

Abstract: Objective - Paraplegia remains a devastating complication after thoracic and thoracoabdominal aortic surgery for coarctations, dissections or aneurysms. Since the advent of ischaemic preconditioning of the myocardium, attention has been directed to the nervous system. This study was designed to evaluate the acute protective effect of ischaemic preconditioning on the spinal cord. Medhods and results - Thirty-six New Zealand white rabbits were randomly assigned to one of three groups. The preconditioning group had 5 minutes of aortic occlusion, 25 minutes reperfusion and 20 minutes of ischaemia, whereas the controls had only 20 minutes of ischaemia.The sham group was anaesthetized and subjected to laparotomy without aortic occlusion. Physiological parameters and somatosensory evoked potentials were monitored during the experiment. Neurological outcome was clinically evaluated up to 48 hour after ischaemia and motor function was scored.Then the animals were sacrificed. Their spinal cord, abdominal aorta and its branches were removed and processed for histopathological examination. Histhopathological changes of the gray matter in the lumbosacral segments were scored from 0 to 6 according to a semi-quantitative scala. The changes in amplitudes of evoked potentials during ischaemia and recovery periods were similar in preconditioning and control groups. The average motor function score was significantly higher in the preconditioning group than the control group at 24 and 48 hours after the ischaemic event (p < 0.05). Histological observations were consistent with the neurological findings. The histopathological scores in the control group and the preconditioning group were 3.2 (1.4-5.2) and 2.4 (0.8-4.4), respectively (p < 0.05). Conclusions - The results suggest that ischaemic preconditioning reduces the spinal cord injury and improves neurological outcome in transient ischaemia in rabbits. This protective mechanism is rapidly invoked within only 25 minutes interval between the preconditioning stimulus and the ischaemic insult.

Optical and photovoltaic properties of salicylaldimine-based azo ligands

Abstract: A series of azo dyes containing salicylaldimine-based ligands as side chains were prepared and characterized Absorption and emission data in five solvents of different polarities were studied Photoirradiation studies under an oxygen atmosphere in water showed that the Schiff base side chains enhanced the photo-oxidative stability of the azo chromophore The electrochemical properties of the dyes were investigated by a cyclic voltammetry The synthesized salicylaldimine-based azo dyes gave two irreversible oxidation potentials Complexation behavior of synthesized compounds with titanium (IV) ions was illustrated by the change in their absorption spectra These ligands are appropriate sensitizers for anchoring to the TiO 2 surface chemically in dye-sensitized solar cell (DSSC) productions Electron injection capacities to TiO 2 and photovoltaic performance of the synthesized salicylaldimine-based azo dyes were tested with DSSC