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Search Results: 1 - 10 of 403 matches for " Erkan "
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Migrating Birds Optimization for Flow Shop Sequencing Problem  [PDF]
Vahit Tongur, Erkan ülker
Journal of Computer and Communications (JCC) , 2014, DOI: 10.4236/jcc.2014.24019
Abstract:

FSSP is a typical NP-Hard problem which is desired to be minimum makespan. This study consid- ers Migrating Birds Optimization (MBO) which is metaheuristic approach for the solution of Flow Shop Sequencing Problem (FSSP). As the basic MBO algorithm is designed for discrete problems. The performance of basic MBO algorithm is tested via some FSSP data sets exist in literature. Obtained results are compared with optimal results of related data sets.

Building Evacuate Module for Urban Underground Passages: Subway Station in Turkey  [PDF]
?lker Erkan, Hasan Hastemoglu
Journal of Transportation Technologies (JTTs) , 2015, DOI: 10.4236/jtts.2015.51001
Abstract: The primary goal of crowd evacuation in urban underground passages or subways is to evacuate as many evacuees as possible to safe areas in the shortest time when emergency events occur. This paper chooses the underground passages of one metro in Istanbul, Turkey as research object, and uses a study method which combines by sites investigation, field test and computer simulation of the creating new software. It is called Building Evacuate Module software. We present a depth analysis of the related factors which include the number and width of passage, channelization setting and the number of pedestrians with the evacuation time. And the influential effect of public opinion is explained by using big data technology. In addition, pedestrians evacuation condition are recorded in three evacuation period, the morning peak, common and evening peak by the observation and statistic obtained with video, and build the model to simulate the change of evacuation time with pedestrians. So it reveals when the number of pedestrians reaches to more than 200, evacuation time increases significantly and the field experiment and simulation condition are consistent basically.
A Root Canal Therapy on the Maxillary First Molar Tooth with Five Canals: A Case Report  [PDF]
Erkan Erhan, Gundogar Mustafa
Open Journal of Stomatology (OJST) , 2015, DOI: 10.4236/ojst.2015.54015
Abstract: Maxillary first molar usually exhibits a radicular anatomy of three roots and three or four canals. However, different anatomic variations like extra number of roots and canals are possible. For a successful treatment, clinicians must have well equipment and a thorough knowledge of the external and internal anatomy of teeth and its variation. Using of CBCT may help to locate extra canals by giving a chance to clinicians to see the root canal anatomy in 3-D view. The aim of this study was to present a case report about a diagnosis and treatment in maxillary first molar with three roots and five canals. It is concluded that the diagnosing and the treatment of unusual cases are key factors for successful endodontic treatment of these teeth.
Design of the Model Predictive Control Education and Application Interface  [PDF]
Eray Yilmazlar, Erkan Kaplano?lu
Journal of Software Engineering and Applications (JSEA) , 2012, DOI: 10.4236/jsea.2012.59080
Abstract: In this study, an education and application interface was designed for model predictive control (MPC). For this design, MPC Toolbox and MATLAB GUI in the MATLAB software were used. Developed interface includes model predictive control methods, such as single-input single-output, multi-input multi-output, constrained or unconstrained systems. The interface, developed for education of model predictive control methods, was tested in class by the students attending to the Process Dynamic and Control course.
Application of Ant Colony Optimization for the Solution of 3 Dimensional Cuboid Structures  [PDF]
Hüseyin Eldem, Erkan ülker
Journal of Computer and Communications (JCC) , 2014, DOI: 10.4236/jcc.2014.24014
Abstract:

Traveling Salesman Problem (TSP) is one of the most widely studied real world problems of finding the shortest (minimum cost) possible route that visits each node in a given set of nodes (cities) once and then returns to origin city. The optimization of cuboid areas has potential samples that can be adapted to real world. Cuboid surfaces of buildings, rooms, furniture etc. can be given as examples. Many optimization algorithms have been used in solution of optimization problems at present. Among them, meta-heuristic algorithms come first. In this study, ant colony optimization, one of meta-heuristic methods, is applied to solve Euclidian TSP consisting of nine different sized sets of nodes randomly placed on a cuboid surface. The performance of this method is shown in tests.

New Evidence-Based Treatment Approach in Beh?et's Disease
Erkan Alpsoy
Pathology Research International , 2012, DOI: 10.1155/2012/871019
Abstract: Beh?et's disease (BD) is a chronic, relapsing, and debilitating systemic vasculitis of unknown aetiology with the clinical features of mucocutaneous lesions, ocular, vascular, articular, neurologic, gastrointestinal, urogenital, and pulmonary involvement. The disease is much more frequent along the ancient “Silk Route” extending from Eastern Asia to the Mediterranean basin, compared with Western countries. The disease usually starts around the third or fourth decade of life. Male sex and a younger age of onset are associated with more severe disease. Although the treatment has become much more effective in recent years, BD is still associated with severe morbidity and considerable mortality. The main aim of the treatment should be the prevention of irreversible organ damage. Therefore, close monitoring, early, and appropriate treatment is mandatory to reduce morbidity and mortality. The treatment is mainly based on the suppression of inflammatory attacks of the disease using immunomodulatory and immunosuppressive agents. In this paper, current state of knowledge regarding the therapeutic approaches is outlined. To provide a rational framework for selecting the appropriate therapy along the various treatment choices, a stepwise, symptom-based, evidence-based algorithmic approach was developed. 1. Introduction Beh?et's disease (BD) is a chronic, relapsing, and debilitating systemic vasculitis of unknown aetiology with the clinical features of mucocutaneous lesions, ocular, vascular, articular, neurologic, gastrointestinal, urogenital, and pulmonary involvement [1]. BD usually starts around the third or fourth decade of life. Recent epidemiologic surveys [2–4] suggest that sex distribution is roughly equal. The disease is particularly prevalent in “Silk Route” populations but has global distribution. The pravelance of the disease is 14–20 per 100?000 along the Silk route [5]. Turkey has the highest prevalence. Azizlerli et al. from Istanbul reported the prevalence of the disease to be nearly 1/250 of the population aged 12 or older [2]. BD is rarely seen in western countries. The pravelance of the disease in England is less than 1/100?000 [5, 6]. This marked geographic variation of BD can be explained by the genetic basis of the disease and/or environmental triggers. The diagnosis is based on clinical criteria, as there is no pathognomonic test. Although several immunological abnormalities have been demonstrated, the exact mechanism of the inflammatory changes occurring remains to be elucidated. The most probable hypothesis is that of an inflammatory
3D Vision by Using Calibration Pattern with Inertial Sensor and RBF Neural Networks
Erkan Be?dok
Sensors , 2009, DOI: 10.3390/s90604572
Abstract: Camera calibration is a crucial prerequisite for the retrieval of metric information from images. The problem of camera calibration is the computation of camera intrinsic parameters (i.e., coefficients of geometric distortions, principle distance and principle point) and extrinsic parameters (i.e., 3D spatial orientations: ω, φ, κ, and 3D spatial translations: tx, ty, tz). The intrinsic camera calibration (i.e., interior orientation) models the imaging system of camera optics, while the extrinsic camera calibration (i.e., exterior orientation) indicates the translation and the orientation of the camera with respect to the global coordinate system. Traditional camera calibration techniques require a predefined mathematical-camera model and they use prior knowledge of many parameters. Definition of a realistic camera model is quite difficult and computation of camera calibration parameters are error-prone. In this paper, a novel implicit camera calibration method based on Radial Basis Functions Neural Networks is proposed. The proposed method requires neither an exactly defined camera model nor any prior knowledge about the imaging-setup or classical camera calibration parameters. The proposed method uses a calibration grid-pattern rotated around a static-fixed axis. The rotations of the calibration grid-pattern have been acquired by using an Xsens MTi-9 inertial sensor and in order to evaluate the success of the proposed method, 3D reconstruction performance of the proposed method has been compared with the performance of a traditional camera calibration method, Modified Direct Linear Transformation (MDLT). Extensive simulation results show that the proposed method achieves a better performance than MDLT aspect of 3D reconstruction.
The Effects of Earthquakes on the Behavioral and Emotional Problems of Preschoolers
Semra Erkan
The Social Sciences , 2013,
Abstract: This study relies on information obtained from mothers to examine how earthquakes affect the behaviors and emotional problems of preschool children with respect to gender and mother’s level of education. This is a descriptive study including a control group. The sample consists of a total of 482 children, 210 of whom were attending preschools in the Sultandagi (Afyon) earthquake zone (participants) and the remaining 272 were attending preschools in Ankara (control group). The study used the Child Behavior Checklist for Ages 11/2 -5; (CBCL/11/2-5) and the Parent Demographic Information and Earthquake Experience Form to gather data. The data was then analyzed by using the Multivariate ANOVA (MANOVA) technique in line with the aim stated above. The results of statistical analyses revealed that children in the earthquake zone displayed more problem behaviors than those in the control group. With respect to gender, girls were found to have more problem behaviors than boys. Also, children of mothers with lower levels of education seemed to have more behavioral/emotional problems than children of mothers with higher education levels.
Lipoma of the Large Intestine: A Clinicopathological Review of Six Cases
Nazif ERKAN
Trakya Universitesi Tip Fakultesi Dergisi , 2010,
Abstract: Objectives: Symptoms of colonic lipomas generally have a silent clinical course. We presented the clinical features, treatment methods, and follow-up results of six cases with large bowel lipoma.Patients and Methods: A retrospective review of patients with a diagnosis of large bowel lipoma between January 2000 and December 2006 was conducted. Data related to presentation, diagnosis, surgical treatment and pathology were analyzed.Results: Six patients (4 men, 2 women; mean age 63 years; range 43 to 82 years) were operated on due to lipoma of large intestine. Abdominal pain was the most common presenting complaint. One of the patients was treated urgently due to colo-colonic intussusception and the others were operated in elective conditions. The endoscopic biopsies were inconclusive. The preoperative diagnosis was colonic lipoma in two patients and four patients were treated due to suspected tumor of the colon. The locations of the lesions were ascending and transverse colon in two patients, cecum and sigmoid colon in the others. Right hemicolectomy was performed in three patients, left hemicolectomy, sigmoid and segmenter colon resections were performed in the others. Histopathologic examinations of the resected materials showed submucosal lipoma of the large intestine. Postoperative period was uneventful in all of the patients.Conclusion: In large symptomatic colonic lipomas that can cause obstruction or hemorrhage, surgical treatment is needed to prevent complications and to exclude the possibility of malignancy.
HUMAN FIGURES IN THE ANATOLIAN SELJUQ ART: A COMPARISON TO THE CAVE DRAWINGS OF UYGURS AND THE MURALS OF GHAZNAVIDS FROM THE ASPECTS OF THEME AND MORPHOLOGY ANADOLU SEL UKLU SANATINDAK NSAN FIGüRLER N N UYGURLARIN MA ARA RES MLER VE GAZNEL LER N DUVAR RES MLER YLE KONU VE B M Y NüNDEN KAR ILA TIRILMASI
Tolga ERKAN
Turkish Studies , 2010,
Abstract: Türk topluluklar ve devletlerinde insan figürü kullan m s k a g rülmektedir. Farkl co rafyalarda, farkl zaman dilimlerinde ve farkl dinleri benimsemi olan Türklerde kullan lan insan figürleri konu ve bi im bak m ndan benzerlik g stermektedir. Bu al mada, Anadolu Sel uklular n sanat eserlerinde bulunan insan figürlerinin kendilerinden nce var olmu Türk topluluklar ve devletlerinin yapt sanat eserlerindeki insan figürleriyle olan ili kiyi incelemektedir. Anadolu Sel uklu sanat eserlerinde g rülen insan figürleriyle, nceki d nemlerde Orta Asya’da ya am olan Türklerin, Uygurlar n ve Gaznelilerin yapt insan figürlerinin bulundu u sanat eserlerinde kompozisyonda kullan lan elemanlar, duru lar, giysiler ve yüzler gibi konu ve bi imsel y nleriyle benzerlik g rülmektedir. Türk sanat nda, Uygurlar ve Gazneliler gibi eski Türk medeniyetlerinin kulland geleneksel insan figürü anlay Anadolu’da Anadolu Sel uklular y netimi d neminde getirilmi ve geli mi tir. Figurative depiction is widely circulated among Turkish communities and states. There is an alikeness of the aspects of theme and morphology in the figurative art among Turkish communities and states even though they adopted different religions and existed in different regions and periods. Turkish figural art tradition was transferred to Minor Asia by the Anatolian Seljuqs. Correspondingly, this study points up the human figures and their use in the art of the Anatolian Seljuqs as a link to documenting figurative depiction elements within previous Turkish communities and states. Hence the figurative depiction that appears in the Anatolian Seljuqs art parallel to the Uygurs and the Ghaznavids wall paintings in terms of theme, setting and scene, and clothes and the faces of the figures. These characteristics of the Anatolian Seljuqs figurative depictions bear similarity to the theme and the morphologic aspects of the ancient Turks in Central Asia, the Uygurs and the Ghaznavids. Therefore Turkish figurative depiction continued to exist and develop in Anatolia under the Anatolian Seljuqs patronage with the influence of ancient Turkish civilizations, including the Uygurs and the Ghaznavids.
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