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Homology of contact CR-warped product submanifolds of an odd-dimensional unit sphere
Bayram \c{S}ahin,Fulya \c{S}ahin 대한수학회 2015 대한수학회보 Vol.52 No.1
We show that homology group on a contact CR-warped product submanifold in odd dimensional sphere is zero under certain conditions in terms of warping function and the dimension of the submanifold.
Intensity and temperature dependence of photocurrent of a-Si:H Schottky diodes
Mehmet ?ahin,Ruhi Kaplan 한국물리학회 2006 Current Applied Physics Vol.6 No.1
The photocurrent of hydrogenated amorphous silicon (a-Si:H) Schottky diode has been studied as a function of light intensityfrom a HeNe laser, applied electric bias, and temperature, by using a constant photocurrent method. TheIVcharacteristics andthus ll factor (FF) values were also obtained over the temperature range 173297 K. The FF increases very little as the temperatureis decreased. The exponentc in the power relationshipIph . Gc between photocurrent and light intensity was found to be temper-ature and electric eld dependent, and peaked around 260 K measured. The activation energy obtained from thermally activatedphotocurrent was also found to be electric eld dependent. These experimental results are discussed by means of the inuence ofthe trapping of charge carriers on the electric eld prole.
Berkan S¸ ahin,Koray Karabekiroğlu,Abdullah Bozkurt,Miraç Barıs¸ Usta,Muazzez Aydın,Cansu Çobanoğlu 대한신경정신의학회 2018 PSYCHIATRY INVESTIGATION Vol.15 No.12
Objective One of the areas of social cognition is Theory of Mind (ToM) is defined as the capacity to interpret, infer and explain mental states underlying the behavior of others. When social cognition studies on neurodevelopmental disorders are examined, it can be seen that this skill has not been studied sufficiently in children with Specific Learning Disorder (SLD). Methods In this study, social cognition skills in children diagnosed with attention deficit hyperactivity disorder (ADHD), SLD or Autism Spectrum Disorder (ASD) evaluated before puberty and compared with controls. To evaluate the ToM skills, the first and secondorder false belief tasks, the Hinting Task, the Faux Pas Test and the Reading the Mind in the Eyes Task were used. Results We found that children with neurodevelopmental disorders as ADHD, ASD, and SLD had ToM deficits independent of intelligence and language development. There was a significant correlation between social cognition deficits and problems experienced in many areas such as social communication and interaction, attention, behavior, and learning. Conclusion Social cognition is an important area of impairment in SLD and there is a strong relationship between clinical symptoms and impaired functionality.
Mustafa ?ahin,Yuksel O?uz,Fuat Buyuktumturk 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.4
In this study, artificial neural networks were used to determine the intensity of brightness in interior spaces. The illumination elements to illuminate indoor spaces were considered, not individually, but as a system. So, during the planned maintenance periods of an illumination system, after its design and installation, simple brightness level measurements must be taken. For a threedimensional evaluation of the brightness level in indoor spaces in a speedy and accurate manner, the obtained brightness level measurement results and artificial neural network model were used. Upon estimation of the most suitable brightness level for indoor spaces by using the artificial neutral network model, the energy demands required by the illumination elements decreased. Consequently, in this study, with estimations of brightness levels, the extent to which the artificial neutral networks become successful was observed and more correct results have been obtained in terms of both economy and usage.
Design of Neural Networks Model for Transmission Angle of a Modified Mechanism
Şahin Yildirim,Selçuk Erkaya,Şükrü Su,íbrabim Uzmay 대한기계학회 2005 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.19 No.10
This paper discusses Neural Networks as predictor for analyzing of transmission angle of slider-crank mechanism. There are different types of neural network algorithms obtained by using chain rules. The neural network is a feedforward neural network. On the other hand, the slider-crank mechanism is a modified mechanism by using an additional link between connecting rod and crank pin. Through extensive simulations, these neural network models are shown to be effective for prediction and analyzing of a modified slider-crank mechanism’s transmission angle.
Omer S¸ahin,Cafer Saka,Sinan Kutluay 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.5
Almond shell based adsorbents were thermally modified by cold plasma and microwave radiation for improving adsorption ability of Eriochrome Black T. The maximum adsorption capacities were 6.02,18.18, and 29.41 mg/g for untreated, cold plasma and microwave radiation treated almond shell,respectively. The removal percentages of EBT compared with untreated almond shell were increased from 39.96% to 81.46% and 84.31% after modification by cold plasma and microwave radiation treatments, respectively. SEM, FT-IR spectroscopy and point of zero charge measurement were applied to analysis the almond shell surface. Data on equilibrium were evaluated by using Langmuir and Freundlich models.
Quantitative trait loci analysis of morphological traits in Citrus
Mehtap S¸ ahin-C¸ evik,Gloria A. Moore 한국식물생명공학회 2012 Plant biotechnology reports Vol.6 No.1
The objectives of this study were to understand the genetic basis of morphological variation observed in the genus Citrus and its relatives and to identify genomic regions associated with certain morphological traits using genetic linkage mapping and quantitative trait loci (QTLs) analysis with random amplified polymorphic DNA (RAPD) markers. First, a genetic linkage map was constructed with RAPD markers obtained by screening 98 progeny plants from a {Citrus grandis 9 [C. paradisi 9 Poncirus trifoliata]} 9 {[(C. paradisi 9 P. trifoliata) 9 C. reticulata] 9 [(C. paradisi 9 Poncirus trifoliata) 9 C. sinensis]} intergeneric cross. The map contains 69 RAPD markers distributed into nine linkage groups. Then, 17 different morphological traits, including six tree and two leaf characters of 98 progeny plants and six floral and three fruit characters of about half of the same progeny plants were evaluated for 2 years and statistically analyzed for variation. Statistical analysis of individual traits indicated that trunk diameter and growth, tree height, canopy width, tree vigor and growth, leaf length and width, petal and anther numbers, petal length and width, length of pistil and style, fruit length and diameter, and fruit segment number showed normal or close to normal distribution, suggesting that these traits may be inherited quantitatively. Quantitative data from the morphological traits were analyzed to detect markers and putative QTLs associated with these traits using interval mapping method. QTL analysis revealed 18 putative QTLs of LOD[3.0 associated with 13 of the morphological traits analyzed. The putative QTLs were distributed in several different linkage groups, and QTLs associated with similar traits were mostly mapped to the same LG or similar locations in the linkage group, indicating that the same genomic region is involved in the inheritance of some of the morphological traits.
Durmus¸ Yıldıray S¸ahin,,Mevlüt Koc,Habib C¸akır,Osman Ziya Arık,Zafer Elbasan,Murat C¸aylı 대한심장학회 2012 Korean Circulation Journal Vol.42 No.11
Percutaneous device closure of atrial septal defect (ASD) is an alternative treatment to surgery. The main advantages of the percutaneous approach include avoidance of surgery, short procedure time and hospital length, in addition to comparable rates of complications. However,percutaneous device closure is associated with infrequent early and late complications including device embolization, air embolism,cardiac tamponade and thrombotic complications. We report a rare complication of silent and late device embolization of the ASD occluder device into the right pulmonary artery, three months after implantation.
Teslime Ayaz,Murtaza Emre Durakog˘lugil,Sinan Altan Kocaman,Tug˘ba Durakog˘lugil,Turan Erdog˘an,Osman Zikrullah S¸ahin,Serap Baydur S¸ahin,Yüksel C¸ic¸ek,Ömer S¸atirog˘lu 대한심장학회 2014 Korean Circulation Journal Vol.44 No.5
Background and Objectives: Left ventricular hypertrophy (LVH), a sign of subclinical cardiovascular disease, is an important predictor of cardiovascular morbidity and mortality. The aim of our study was to determine the association of left ventricular mass (LVM) with possible causative anthropometric and biochemical parameters as well as carotid intima-media thickness (CIMT) and brachial flow-mediated dilation (FMD) as surrogates of atherosclerosis and endothelial dysfunction, respectively, in previously untreated hypertensive patients. Subjects and Methods: Our study included 114 consecutive previously untreated hypertensive patients who underwent echocardiography and ultrasonography to evaluate their vascular status and function via brachial artery CIMT and FMD. Results: Among all study parameters, age, systolic blood pressure (BP), diastolic BP, pulse pressure, plasma glucose, uric acid, total bilirubin, direct bilirubin, hemoglobin, and CIMT were positively correlated with the LVM index. Multiple logistic regression analysis revealed that office systolic BP, age, male gender, and total bilirubin were independent predictors of LVH. Conclusion: Bilirubin seems to be related to LVM and LVH. The positive association of bilirubin with these parameters is novel and requires further research.
Onur Ş,ahin,Onur Odabaş,Toghrul Aliyev,Birkan Tatar 대한구강악안면외과학회 2019 대한구강악안면외과학회지 Vol.45 No.2
Objectives: Medication-related osteonecrosis of the jaw (MRONJ) is a well-known side effect of certain drugs that are used to influence bone metabolism to treat osteometabolic disease or cancers. The purpose of our study was to investigate how high-concentration and low-concentration bisphosphonate (BP) intake affects the disease severity. Materials and Methods: Data collected from the medical records of 52 patients treated with BPs, antiresorptive, antiangiogenic drugs and diagnosed with MRONJ were included in this study. Age, sex, type of systemic disease, type of drug, duration of drug treatment, jaw area with MRONJ, drug administration protocol, and MRONJ clinical and radiological findings were obtained. Patients were divided into two groups: anti-neoplastic (Group I, n=23) and anti-osteoporotic (Group II, n=29). Statistical evaluations were performed using the IBM SPSS ver. 21.0 program. Results: In both groups, more females had MRONJ. MRONJ was found in the mandibles of 30 patients (Group I, n=14; Group II, n=16). When we classified patients according to the American Association of Oral and Maxillofacial Surgeons staging system, significant differences were seen between groups (χ 2 =12.23, P<0.01). More patients with advanced stage (stage 2-3) MRONJ were found in Group I (60.9%). Conclusion: According to our results, high-concentration BP intake, age and duration of drug intake increased disease severity.