Yazar "Yosunkaya Ş." seçeneğine göre listele

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    Examining the effect of time and frequency domain features of EEG, EOG, and Chin EMG signals on sleep staging [EEG, EOG ve Çene EMG sinyallerinden elde edilen zaman ve frekans domeni özelliklerinin uyku evreleme üzerindeki etkisinin i?ncelenmesi]
    (2010) Özşen S.; Güneş S.; Yosunkaya Ş.
    Sleep staging has an effective role in diagnosing sleep disorders. Sleep staging is generally done by a sleep expert through examining Electroencephalogram (EEG), Electrooculogram (EOG), Electromyogram (EMG) signals of the patients and determining the stages of sleep in different time sections. This type of sleep staging is preferred among the sleep experts but because it is rather tiring and time consuming task, attention to the automatic sleep staging systems has been begun to increase. In this study, we obtained EEG, EMG and EOG signals of five healthy people in Meram Faculty of medicine to use in sleep staging and extracted 74 features from them. We analyzed the effects of these features on sleep staging. We utilized from the sequential feature selection algorithm and Artificial Neural Networks in this application. We determined which features are more effective in classification of sleep stages and by this way we tried to guide researchers who will use EEG, EMG and EOG features in sleep staging. The highest classification accuracy was obtained as 69.30% with use of four features. ©2010 IEEE.
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    A multiple myeloma case presenting with bilateral pleural involvement [Bilateral plevral tutulum ile başvuran multipl miyelom olgusu]
    (2007) Yosunkaya Ş.; Maden E.; Toy H.; Yazici R.; Özer F.; Reisli I.
    Pleural effusion is a relatively infrequent finding in multiple myeloma (MM) and malign effusions due to myelomatous effusion is seen very rarely. In this article we reported a case with bilateral myelomatous effusion. Myelomatous etiology was detected by demonstrating gammopaty in pleural fluid protein electrophoresis and demonstrating abundant number of atypical plasma cells in pleural fluid cytology. Pleural fluids due to MM are usually seen in IgA type of MM's, IgG on the surface of CD-138 positive cell was demonstrated in flow cytometric study of the pleural fluid of the reported case. In conclusion we mentioned that a patient who does not have diagnosis of MM before may present with pleural involvement, the involvement may be bilateral and flow cytometry can be used in diagnosis.