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RISS 인기검색어
- 검색키워드
- 저자 : Ahmet Albayrak (검색결과 4 건)
- 무료
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Prostate Metastasis of Malignant Melanoma
Muhsin Balaban,Ahmet Selimoglu,Rahim Horuz,Oktay Akca,Selami Albayrak 대한비뇨의학회 2013 Investigative and Clinical Urology Vol.54 No.7
Metastatic malignant melanoma of the prostate is extremely rare in clinical practice,and only one case has been reported in the English literature in the past 30 years. We report a case of malignant melanoma that metastasized to the prostate and review the current literature. A 50-year-old man with a history of malignant melanoma metastasis to the left axilla, which was excised 3 years ago, presented with lower urinary tract symptoms and gross hematuria. He underwent cystoscopy and transurethral resection of the prostate. The pathological examination showed metastatic malignant melanoma of the prostate gland. The patient died 6 months after the transurethral resection.
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Musa Matli,Ahmet Albayrak,Raif Bayir 한국지능시스템학회 2020 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.20 No.3
This study aims to present an idea about the practical consequences of using mobile robots with Mecanum wheels. For mobile robots, an approach is proposed to avoid obstacles without location and map information. This approach is presented using a series of developed solutions. This article shares the process on how a set of discussed conceptual methodologies can be applied as well as their practical results. This method is provided using fuzzy logic and gap tracking. LIDAR is used to recognize obstacles around the mobile robot. By using the LIDAR, the robot detects gaps around it and moves according to fuzzy logic. The fuzzy logic consists of three inputs, an output, and 45 rules. The first of the membership functions represents the membership function that replaces the obstacle. The second membership function calculates the distance to the obstacle. The final login membership function is used to determine the angle between the obstacle and robot view. The output membership function represents the membership function that moves the robot. The results are analyzed under three different scenarios with five different experiments for each scenario. The results show that the mobile robot can avoid obstacles without location and map information. We believe that the proposed method can be used in mobile robots such as guard and service robots.
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A Retrospective Study of Congenital Cardiac Abnormality Associated with Scoliosis
Evin Bozcali,Hanifi Ucpunar,Ahmet Sevencan,Mehmet Bulent Balioglu,Akif Albayrak,Veli Polat 대한척추외과학회 2016 Asian Spine Journal Vol.10 No.2
Study Design: Retrospective study. Purpose: To identify the incidence of congenital cardiac abnormalities in patients who had scoliosis and underwent surgical treatment for scoliosis. Overview of Literature: Congenital and idiopathic scoliosis (IS) are associated with cardiac abnormalities. We sought to establish and compare the incidence of congenital cardiac abnormalities in patients with idiopathic and congenital scoliosis (CS) who underwent surgical treatment for scoliosis. Methods: Ninety consecutive scoliosis patients, who underwent surgical correction of scoliosis, were classified as CS (55 patients, 28 female [51%]) and IS (35 patients, 21 female [60%]). The complete data of the patients, including medical records, plain radiograph and transthoracic echocardiography were retrospectively assessed. Results: We found that mitral valve prolapse was the most common cardiac abnormality in both patients with IS (nine patients, 26%) and CS (13 patients, 24%). Other congenital cardiac abnormalities were atrial septal aneurysm (23% of IS patients, 18% of CS patients), pulmonary insufficiency (20% of IS patients, 4% of CS patients), aortic insufficiency (17% of IS patients), atrial septal defect (11% of IS patients, 13% of CS patients), patent foramen ovale (15% of CS patients), dextrocardia (4% of CS patients), bicuspid aortic valve (3% of IS patients), aortic stenosis (2% of CS patients), ventricular septal defect (2% of CS patients), and cardiomyopathy (2% of CS patients). Conclusions: We determined the increased incidence of congenital cardiac abnormalities among patients with congenital and IS. Mitral valve prolapse appeared to be the most prevalent congenital cardiac abnormality in both groups.
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Onder Canguven,Muhsin Balaban,Ahmet Selimoglu,Selami Albayrak 대한비뇨의학회 2013 Investigative and Clinical Urology Vol.54 No.8
Sarcoidosis is a multisystem, inflammatory disorder characterized by the presence of noncaseating epithelioid granulomas. Sarcoidosis can involve the genitourinary system by affecting the kidney and genitals. Most characteristic genital lesions proceed to granuloma and can comprise the epididymis, testis, and vas deferens. Few case reports have been published on this rare entity. We report a case in which a man presented with bilateral epididymal sarcoidosis and severe oligospermia. Corticosteroid treatment, which was applied in gradually decreasing doses for 6 months, dissolved the testicular granuloma. Consequently, semen analysis demonstrated a significant increase in the sperm count to within normal limits.
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