Orhan Er
Sakarya University
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Orhan Er.
Expert Systems With Applications | 2010
Orhan Er; Nejat Yumusak; Feyzullah Temurtas
Chronic obstructive pulmonary, pneumonia, asthma, tuberculosis, lung cancer diseases are the most important chest diseases. These chest diseases are important health problems in the world. In this study, a comparative chest diseases diagnosis was realized by using multilayer, probabilistic, learning vector quantization, and generalized regression neural networks. The chest diseases dataset were prepared by using patients epicrisis reports from a chest diseases hospitals database.
Journal of Medical Systems | 2010
Orhan Er; Feyzullah Temurtas; A. Çetin Tanrıkulu
Tuberculosis is an infectious disease, caused in most cases by microorganisms called Mycobacterium tuberculosis. Tuberculosis is a great problem in most low income countries; it is the single most frequent cause of death in individuals aged fifteen to forty-nine years. Tuberculosis is important health problem in Turkey also. In this study, a study on tuberculosis diagnosis was realized by using multilayer neural networks (MLNN). For this purpose, two different MLNN structures were used. One of the structures was the MLNN with one hidden layer and the other was the MLNN with two hidden layers. A general regression neural network (GRNN) was also performed to realize tuberculosis diagnosis for the comparison. Levenberg-Marquardt algorithms were used for the training of the multilayer neural networks. The results of the study were compared with the results of the pervious similar studies reported focusing on tuberculosis diseases diagnosis. The tuberculosis dataset were taken from a state hospital’s database using patient’s epicrisis reports.
Journal of Medical Systems | 2008
Orhan Er; Feyzullah Temurtas
Chronic Obstructive Pulmonary Disease (COPD) is a disease state characterized by airflow limitation that is not fully reversible. The airflow limitation is usually both progressive and associated with an abnormal inflammatory response of the lungs to noxious particles or gases. COPD is important health problem and one of the most common illnesses in Turkey. It is generally accepted that cigarette smoking is the most important risk factor and genetic factors are believed to play a role in the individual susceptibility. In this study, a study on COPD diagnosis was realized by using multilayer neural networks (MLNN). For this purpose, two different MLNN structures were used. One of the structures was the MLNN with one hidden layer and the other was the MLNN with two hidden layers. Back propagation with momentum and Levenberg–Marquardt algorithms were used for the training of the neural networks. The COPD dataset were prepared from a chest diseases hospital’s database using patient’s epicrisis reports.
Journal of Medical Systems | 2009
Orhan Er; Cengiz Sertkaya; Feyzullah Temurtas; A. Çetin Tanrıkulu
Millions of people are diagnosed every year with a chest disease in the world. Chronic obstructive pulmonary and pneumonia diseases are two of the most important chest diseases. And these are very common illnesses in Turkey. In this paper, a comparative study on chronic obstructive pulmonary and pneumonia diseases diagnosis was realized by using neural networks and artificial immune systems. For this purpose, three different neural networks structures and one artificial immune system were used. Used neural network structures in this study were multilayer, probabilistic, and learning vector quantization neural networks. The results of the study were compared with the results of the pervious similar studies reported focusing on chronic obstructive pulmonary and pneumonia diseases diagnosis. The chronic obstructive pulmonary and pneumonia diseases dataset were prepared from a chest diseases hospital’s database using patient’s epicrisis reports.
Computers & Electrical Engineering | 2012
Orhan Er; Abdullah Cetin Tanrikulu; Abdurrahman Abakay; Feyzullah Temurtas
Malignant mesothelioma (MM) is an aggressive progress tumor that results from mesotel cells and pleura usually incurs. The two important causes, in MM etiologies are known as asbestos and erionite, both mineral fibers. Environmental asbestos exposure and MM are one of the major public health problems of Turkey. In this study, two different probabilistic neural network (PNN) structures were used for MMs disease diagnosis. The PNN results were compared with the results of the multilayer and learning vector quantization neural networks focusing on MMs disease diagnosis and using same database. It was observed the PNN is the best classification with 96.30% accuracy obtained via 3-fold cross-validation. The MM disease dataset were prepared from a faculty of medicines database using new patients hospital reports from south east region of Turkey.
Expert Systems With Applications | 2012
Orhan Er; Nejat Yumusak; Feyzullah Temurtas
Chest diseases are one of the greatest health problems for people living in the developing world. Millions of people are diagnosed every year with a chest disease in the world. Chronic obstructive pulmonary, pneumonia, asthma, tuberculosis, lung cancer diseases are most important chest diseases and these are very common illnesses in Turkey. In this paper, a study on chest diseases diagnosis was realized by using artificial immune system. We obtained the classification accuracy with artificial immune system 93.84%. The result of the study was compared with the results of the previous similar studies reported focusing on chest diseases diagnosis. The chest diseases dataset were prepared from a chest diseases hospitals database using patients epicrisis reports.
Biomedizinische Technik | 2016
Ahmet Sertol Koksal; Orhan Er; Hayrettin Evirgen; Nejat Yumusak
Abstract Clinical decision support systems (C-DSS) provide supportive tools to the expert for the determination of the disease. Today, many of the support systems, which have been developed for a better and more accurate diagnosis, have reached a dynamic structure due to artificial intelligence techniques. However, in cases when important diagnosis studies should be performed in secret, a secure communication system is required. In this study, secure communication of a DSS is examined through a developed double layer chaotic communication system. The developed communication system consists of four main parts: random number generator, cascade chaotic calculation layer, PCM, and logical mixer layers. Thanks to this system, important patient data created by DSS will be conveyed to the center through a secure communication line.
Dicle Medical Journal / Dicle Tip Dergisi | 2015
Orhan Er; A. Çetin Tanrikulu; Abdurrahman Abakay
Journal of Medical Imaging and Health Informatics | 2016
Orhan Er; Onursal Çetin; M. Serdar Bascil; Feyzullah Temurtas
Biomedical Research-tokyo | 2017
Amani Yahiaoui; Orhan Er; Nejat Yumusak