Browsing by Author "Erturk, Korhan Levent"
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Article Citation Count: 0Analysis of Turkey's Institutional Open Repositories: An Example of Dokuz Eylul University Institutional Open Repository(Turkish Librarians Assoc, 2012) Ertürk, Korhan Levent; Şengül, Gökhan; Information Systems Engineering; Computer EngineeringAfter the declaration of the Budapest Open Access Initiative in 2001, institutional open repositories are known as the most important tool of the self archiving, which is also known as green road. There are 26 institutional repositories, which are all compatible to international standards. All the institutional open repositories of Turkey mentioned before are listed in international open archive directories. In this study institutional open repository of Dokuz Eylul University is examined and institutional open repositories of Turkey are discussed.Article Citation Count: 8A Magnetic Measurement System and Identification Method for Buried Magnetic Materials Within Wet and Dry Soils(Ieee-inst Electrical Electronics Engineers inc, 2016) Nazlıbilek, Sedat; Ertürk, Korhan Levent; Kakilli, Adnan; Citak, Hakan; Kalender, Osman; Erturk, Korhan Levent; Karacor, Deniz; Information Systems Engineering; Department of Mechatronics EngineeringIn this paper, a new magnetic measurement system is developed to determine upper surfaces of buried magnetic materials, particularly land mines. This measurement system uses the magnetic-anomaly-detection method. It also has intelligent identification software based on an image matching algorithm. It is aimed to determine and identify the buried ferromagnetic materials with minimum energy consumption. It is concentrated on the detection and identification of the shapes of upper surfaces of buried magnetic materials in dry and wet conditions. The effect of humidity in the detection process for detection is tested. In this paper, we used sensor images to identify various ferromagnetic materials and similar objects. Sensor images of soils at various humidities covering the objects were obtained. We used the speeded-up-feature-transform algorithm in the comparison process of the images. Dry soil sample images match with the corresponding wet soil samples with the highest matching rate. The images for different objects can easily be distinguished by the matching process.Conference Object Citation Count: 1Self Archiving in Atilim University(Springer-verlag Berlin, 2012) Ertürk, Korhan Levent; Şengül, Gökhan; Information Systems Engineering; Computer EngineeringSelf archiving is defined as storing the scientific research outputs in researchers' own web pages/sites, organizational web sites or institutional repositories. In this study the self archiving activities of academicians of Atilim University are investigated. For the purpose of the study the web pages of the university, personal web pages of the academicians and open repository of the university are explored. We found the details of 2176 academic activities of the instructors in web pages. More than half of these activities (1147 - 53%) consist of refereed journal papers. Almost a quarter of the instructors saved their research outputs in the university's open repository. Yet, those instructors have not published their works in their personal web pages or institutional web pages. Only 4% of the works are published in personal/organizational web pages. According to the results obtained, the usage of institutional repository is the common self archiving method in the Atilim University. On the other hand, the personal/organizational web pages should be as a point of attraction in self archiving. While discussing the efficient usage of the institutional repository, we suggest that the social networks as a meeting point should include links to personal/institutional web pages containing academicians' papers.Article Citation Count: 1Three-Dimensional Visualization with Large Data Sets: A Simulation of Spreading Cortical Depression in Human Brain(Hindawi Publishing Corporation, 2012) Şengül, Gökhan; Sengul, Gokhan; Ertürk, Korhan Levent; Computer Engineering; Information Systems EngineeringWe developed 3D simulation software of human organs/tissues; we developed a database to store the related data, a data management system to manage the created data, and a metadata system for the management of data. This approach provides two benefits: first of all the developed system does not require to keep the patient's/subject's medical images on the system, providing less memory usage. Besides the system also provides 3D simulation and modification options, which will help clinicians to use necessary tools for visualization and modification operations. The developed system is tested in a case study, in which a 3D human brain model is created and simulated from 2D MRI images of a human brain, and we extended the 3D model to include the spreading cortical depression (SCD) wave front, which is an electrical phoneme that is believed to cause the migraine.Article Citation Count: 2The Visibility of Scholarly Knowledge: Awareness for Open Access in Hacettepe University(Turkish Librarians Assoc, 2010) Ertürk, Korhan Levent; Kucuk, Mehmet Emin; Information Systems EngineeringThe scholars begin to place their works into the open repositories or open access journals as well as their personal web sites. In the international arena, the open repositories contain a total of 14,000 Turkey-based scholarly contents. The focus of this study is to determine the level of awareness for open access concept of scholars in Hacettepe University. An electronic questionnaire was conducted to scholars. The data were collected through questionnaire from full time academic staff member in Hacettepe University. It was found that 50% of scholars are aware of the open access concept and 92% of the scholars are willing to place their works into the institutional repository of their university. According to questionnaire study result, different types of works such as articles and assertions can be placed in the institutional open repositories in Turkey and their functionality can be increased in a short time.Article Citation Count: 8White Blood Cells Classifications by SURF Image Matching, PCA and Dendrogram(Allied Acad, 2015) Nazlıbilek, Sedat; Ertürk, Korhan Levent; Şengül, Gökhan; Aliew, Fuad; Ercan, Tuncay; Aliew, Fuad; Department of Mechatronics Engineering; Information Systems Engineering; Computer EngineeringDetermination and classification of white blood cells are very important for diagnosing many diseases. The number of white blood cells and morphological changes or blasts of them provide valuable information for the positive results of the diseases such as Acute Lymphocytic Leucomia (ALL). Recognition and classification of white cells as basophils, lymphocytes, neutrophils, monocytes and eosinophils also give additional information for the diagnosis of many diseases. We are developing an automatic process for counting, size determination and classification of white blood cells. In this paper, we give the results of the classification process for which we experienced a study with hundreds of images of white blood cells. This process will help to diagnose especially ALL disease in a fast and automatic way. Three methods are used for classification of five types of white blood cells. The first one is a new algorithm utilizing image matching for classification that is called the Speed-Up Robust Feature detector (SURF). The second one is the PCA that gives the advantage of dimension reduction. The third is the classification tree called dendrogram following the PCA. Satisfactory results are obtained by two techniques.