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Search Results: 1 - 10 of 68 matches for " Ozgen Ilgaz Kocyigit "
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A Case of Pituitary Hemorrhage Following Cardiopulmonary Bypass Surgery  [PDF]
Ozgen Ilgaz Kocyigit, Serdar Kabatas, Erdinc Civelek, Ezgi Tuncay, Oguz Omay, Tufan Cansever, Ayda Turkoz
Surgical Science (SS) , 2011, DOI: 10.4236/ss.2011.23034
Abstract: A 68-year-old female patient with previous history of transsphenoidal hypophysectomy operation underwent three-vessel coronary artery bypass graft (CABG) surgery for extensive coronary artery disease. Preoperative neurological examination revealed sequelae visual loss at right temporal visual field. Follow-up Magnetic Resonance Imaging studies showed a residual hypophyseal tumor tissue extending to suprasellar area. No additional pathology was detected in the early postoperative cranial control CT, but aggravation of visual field defect was determined. Coincidently, cranial magnetic resonance imaging (MRI) showed hemorrhage into the tumor tissue. We decided to follow-up the patient who exhibited no additional symptoms and was discharged well on the fifth day due to the signs of resolution of hemorrhage. Follow-up controls of the patient at sixth and twelfth months demonstrated normal hormone levels without any additional clinical complaints. We present preoperative assessment, perioperative anesthesia management, and postoperative clinical follow-up of a patient with a residual hypophyseal tumor.
Transforaminal epidural steroid injection via a preganglionic approach for lumbar spinal stenosis and lumbar discogenic pain with radiculopathy
Kabatas Serdar,Cansever Tufan,Yilmaz Cem,Kocyigit Ozgen
Neurology India , 2010,
Abstract: Background: Epidural steroid injection (ESIs) is one of the treatment modalities for chronic low back pain (CLBP) with various degrees of success. Aim: We analyzed the efficacy of fluoroscopically guided transforaminal epidural steroid injections (TFESIs) via a preganglionic approach in patients with foraminal stenosis due to lumbar spinal stenosis and lumbar discogenic pain with radiculopathy. Materials and Methods: We analyzed the data of 40 patients (February 2008 and April 2009) with the diagnosis of CLBP and treated by fluoroscopically guided TFESIs via a preganglionic approach. Patients were followed-up at one month (short term), six months (midterm) and one year (long term) after injections. Follow-up data collection included the Visual Numeric Pain Scale (VNS) and North American Spine Society (NASS) patient satisfaction scores. Results: The mean age of the patients was 59.87 ± 15.06 years (range 30 - 89 years, 25 women). Average follow-up period was 9.22 ± 3.56 months. Statistically significant differences were observed between the pre-procedure and post-procedure VNSs (P < 0.01, Pearson Correlation Test). Improvements in VNS scores were correlated with improvements in the NASS scores. When the VNS scores were evaluated with respect to the age of patient, level numbers, gender, pre-procedure symptom duration and pre-procedure VNS, no significant differences were found (P < 0.05, linear regression test). At short term evaluation in post treatment (one month), 77.78 % of patients were found to have a successful outcome and 22.22 % were deemed failures. Overall patient satisfaction was 67.23 % in the midterm period. Additionally, 54.83 % of patients (N/n: 15/8) had a successful long-term outcome at a follow-up of one year. Conclusion: Our data suggest that fluoroscopically guided TFESIs via a preganglionic approach, in patients with foraminal stenosis due to lumbar spinal stenosis and lumbar discogenic pain with radiculopathy, has effective outcome and patients responding to injection have significantly lower post-injection pain scores.
Primary Perceptual Field in Visual Materials
Ozgen Korkmaz
The Social Sciences , 2013,
Abstract: This study aims to determine the field (s) that students tend to perceive first in an instructional material. It employs the scanning model and its study group consists of 378 sophomore students attending the Faculty of Education at Ahi Evran University. The data has been obtained by collecting the student responses to a visual material designed by the researchers. The results have been interpreted through the frequency, percentage, Kendall s tau_b and the Kolmogorov-Smirnov Z-test applied on the collected data. For the differences and relationships, a significance level of p<0.05 was deemed as sufficient. The analysis yielded the following conclusions: the field including the primarily perceived message in a visual principally focuses around the center of the visual or in the first point of interest according to the rule of thirds. In the subsequent visuals as well, students tend to look at the point where the message they primarily perceived is located. Finally in a visual containing informal balance, the primarily perceived message concentrates more on the center of the visual when compared to the formal balance.
Public Relations and An Argument about Problems of New Media
Ebru Ozgen
Global Media Journal : Turkish Edition , 2011,
Abstract: The study explores the advantages and disadvantages new media, i.e. the Internet, has brought to the Public Relations discipline and in doing so emphasizes that it is vital to consider these positive and negative effects.
Prevalence of Restless Legs Syndrome in Patients Treated with Peritoneal Dialysis: Clinical and Biochemical Characteristics among Patients with and without Restless Legs Syndrome  [PDF]
Selda Korkmaz, Bulent Tokgoz, Sevda Ismailogullari, Ismail Kocyigit, Merva Kocyigit, Ozgur Berkay Aksu, Murat Aksu
Open Journal of Nephrology (OJNeph) , 2013, DOI: 10.4236/ojneph.2013.31008
Abstract: Introduction and Aims:This is a prospective study identifying prevalence of Restless Legs Syndrome (RLS) in patients ongoing peritoneal dialysis (PD) due to end stage renal disease (ESRD) and comparing clinical and biochemical characteristics among patients with and without RLS. Methods: Two hundred ESRD patients who received PD at least six months assessed by neurologist and nephrologist with regards to presence of RLS. Also, clinical and biochemical features of these patients are determined. One hundred and forty four patients were excluded from study because they had other secondary causes of RLS except for ESRD. Results: Thirteen of 56 patients (23.2%) had RLS. The use of vitamin B + folic acid supplements was significantly lower in patients with RLS than in those without RLS (69.2% vs 97.7%; p = 0.008). There was no significant difference between patient groups with and without RLS in terms of age, gender, body mass index, cause of ESRD, peritoneal membrane transport characteristic, smoking, consuming alcohol, use of erythropoietin, duration of PD, hemoglobin, serum calcium, serum phosphorus, serum albumin, levels of serum iron, total iron binding capacity, ferritin, folic acid and vitamin B12, transferrin saturation, weekly Kt/V urea value, and amount of residual urine volume (p > 0.05). Conclusion: RLS is more common among PD patients than general population. Although essential cause is not exactly known, use of folic acid and vitamin B complex decrease the RLS prevalence in this particular patient group.
Lead Inhibition on Urea Hydrolyzing Microorganisms under Batch Conditions
A. Kilic, H. Kocyigit
Biotechnology & Biotechnological Equipment , 2010, DOI: 10.2478/V10133-010-0079-2
Abstract: Lead, Pb(II), inhibition of microbial calcium precipitation by ureolytic microorganisms was carried out with a glucose containing mineral medium under batch conditions over an incubation period of 120 hours. Substrate removal rate fitted a zero order up to 70th hour and first order kinetic after that time for all samples containing lead concentrations of 0-64 mg/L. The increase of Pb(II) concentrations from 0 to 64 mg/L reduced constant of substrate degradation rate from 10.26 to 4.04 mg glucose/L h, and from 0.027 to 0.005 1/h for zero (k0) and first order kinetic constant (k1), respectively. The Pb(II) at concentration higher than 16 mg/L mainly inhibited both substrate removal and nitrification process. Although nitrification was inhibited at higher concentrations of lead, its inhibition caused precipitation of calcium due to high pH and alkalinity levels in the samples. As a result that a modified Monod inhibition model was applied to BOD data, BOD removal rate inhibited non-competitively. The non-competitive inhibition constants (K1) were 10.4 mg/L for KS, and 37.3 mg/L for Rmax at Pb(II) concentration of 64 mg/L.
The Effect of Aerobic Exercise on Cardiopulmonary System in Children
Dilek Sevimli,Fuat Kocyigit
TAF Preventive Medicine Bulletin , 2009,
Abstract: AIM: The purpose of this study is to investigate the changes in cardiopulmonary system stimulated by aerobic exercise in different age group of children and to find out in which age group aerobic exercise is more effective. METHOD: Totally, 76 children participated in this study. Ages of the participants ranged between 11 17, and mean age was 14.08±0.65. Participants were divided into three groups according to their age range. There were 23 in the first and second and 30 participants in the third group, (15 17), (13 14) and 30 (11 12) respectively. Each of the groups then was divided into two parts one of which was experimental and the other was control group. During 8 weeks, a training programme based on doing aerobic exercise lasting one hour 3 days a week was performed in the experimental groups. Before and after training, EKG, spirometer, blood pressure, heart rate, PWC 170 test of the participants, which was the data collection method, were recorded. The results obtained were compared through t test method of SPSS. RESULTS: The results revealed a decrease in the systolic blood pressure and in the heart rate of those who did exercise as opposed to those who did not do exercise in Group I. In addition, R wave height in V6 of exercise group showed a statistically significant increase. As for second group, it was determined that the R/S, at V1 derivation obtained from the participants who did exercise showed a statistically decrease as compared to those of the participants who did not do exercise. In the third group, no changes were observed in the systolic blood pressure the heart rate, R wave height in V6 and R/S although the measures of PWC 170 test, VC and FVC obtained from all training groups made a significant increase when compared to those of control groups. CONCLUSION: The results of this study revealed that of the three groups the 15 17 age group was affected mostly by the aerobic exercise on kardiyopulmoner sytem. The results suggest that the exercises performed with this group affected the participants positively, which should be taken into consideration for further research. [TAF Prev Med Bull. 2009; 8(2): 125-130]
Resolution analysis of imaging with $\ell_1$ optimization
Liliana Borcea,Ilker Kocyigit
Mathematics , 2015,
Abstract: We study array imaging of a sparse scene of point-like sources or scatterers in a homogeneous medium. For source imaging the sensors in the array are receivers that collect measurements of the wave field. For imaging scatterers the array probes the medium with waves and records the echoes. In either case the image formation is stated as a sparsity promoting $\ell_1$ optimization problem, and the goal of the paper is to quantify the resolution. We consider both narrow-band and broad-band imaging, and a geometric setup with a small array. We take first the case of the unknowns lying on the imaging grid, and derive resolution limits that depend on the sparsity of the scene. Then we consider the general case with the unknowns at arbitrary locations. The analysis is based on estimates of the cumulative mutual coherence and a related concept, which we call interaction coefficient. It complements recent results in compressed sensing by deriving deterministic resolution limits that account for worse case scenarios in terms of locations of the unknowns in the imaging region, and also by interpreting the results in some cases where uniqueness of the solution does not hold. We demonstrate the theoretical predictions with numerical simulations.
On the Convex Hulls of Self-Affine Fractals
Ibrahim Kirat,Ilker Kocyigit
Mathematics , 2015,
Abstract: Suppose that the set ${\mathcal{T}}= \{T_1, T_2,...,T_q \} $ of real $n\times n$ matrices has joint spectral radius less than $1$. Then for any digit set $ D= \{d_1, \cdots, d_q\} \subset {\Bbb R}^n$, there exists a unique nonempty compact set $F=F({\mathcal{T}},D)$ satisfying $ F = \bigcup _{j =1}^q T_j(F + d_j)$, which is called a self-affine fractal. We consider an existing criterion for the convex hull of $F$ to be a polytope, which is due to Kirat and Kocyigit. In this note, we strengthen our criterion for the case $T_1=T_2=\cdots =T_q $. More specifically, we give an upper bound for the number of steps needed for deciding whether the convex hull of $F$ is a polytope or not. This improves our earlier result on the topic.
The Amphibian and Reptile Species of Igneada (Kirklareli) and its Vicinity
?etin Ilgaz,Yusuf Kumlutas
Pakistan Journal of Biological Sciences , 2005,
Abstract: This study was aimed to describe the herpetofauna of Igneada (Kirklareli) and its vicinity. In the research area, 113 specimens belonging to 14 species from 8 amphibian and reptile families were determined. Two of these anurans, 1 is a tortoise, 1 is a turtles, 7 are lizards and 2 are snakes. Darevskia praticola pontica specimens collected in the research area were investigated according to pholidosis characters and morphometric measurements and the known range of this subspecies was also extended.
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