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Öğe Bulanık mantık kontrollü kaynak ağzı izleyen kaynak robotunun tasarımı ve imalatı(Selçuk Üniversitesi Fen Bilimleri Enstitüsü, 2011-10-13) Öztürk, Ahmet; Düzcükoğlu, HayrettinBu tez çalışmasında; lazer sensörlü ve mekanik sensörlü (Problu) iz takip sistemleri geliştirilmiştir. Lazer sensörü iz takip sisteminde doğrusal ve doğrusal olmayan yönlerde açılmış kaynak izi profillerinin takibinde ve kaynak başlangıç noktasının tespitinde bulanık mantık kontrollü yapılarak standartlara uygun ve kaynak izini takip edebilen kaynak otomasyonu geliştirilmiş ve uygulama yapılmıştır. Mekanik sensör ve lazer sensör ile değişik yönlerde açılmış kaynak iz takibi yapılarak bulanık mantık ve PIC tabanlı kontrollü kaynak prosesleri karşılaştırmalarda yapılmıştır. Her iki uygulamanın da gerçek ortamlarda test ve deneyleri gerçekleştirilmiştir. Bulanık mantık kontrollü lazer sensörlü kaynak izi takip sisteminde özellikle farklı konumlarda açılmış (doğrusal olmayan kaynak izi) kaynak izinin takibinde, torcun kaynak izini ortalamasında ve ani değişimlerde bulanık mantık kontrollü sistemin daha başarılı olmuştur. Mekanik sensör ise genellikle eksenel değişimlerinin az olduğu ve kaynak hızının daha hızlı olduğu yerlerin iz takibinde daha başarılı uygulamalar yapılmıştır. Bu çalışmada farklı kaynak yöntemlerinde kullanılmak üzere, 2 eksende hareket edebilen, lazer sensörlü iz takip sisteminde bilgisayar tabanlı bulanık mantık (fuzzy logic) kontrollü ve mekanik sensör uygulamalarında ise PIC tabanlı kontrollü robot manipülatör tasarımı ve imalatı gerçekleştirilmiştir.Öğe DESIGN AND MANUFACTURE OF A NEW TWO AXES WELDING SEAM TRACKING SYSTEM USING LASER SENSOR FUZZY LOGIC CONTROL(YILDIZ TECHNICAL UNIV, 2018) Düzcükoğlu, Hayrettin; Aydoğdu, Ömer; Öztürk, Ahmet; Akkuş, HarunIn this study, a welding seam tracking system that is unique to the three axes (X-Y-Z) controlled application with laser sensor was put into practice. In the study, the monitoring of the planar axes (X-Y) of the torch was done by Fuzzy Logic Controllers that best model the specialist information the. The height of the torch to the welding piece (Z axis) was arranged by classic proportional control method. In order to do the welding properly in welding implementations, the torch and the welding bend have to move along the predetermined way (Y) in a constant linear speed. In certain conditions, due to the shift in the piece to be welded or a sloped profile, the harmony of the welding bend and torch may be disrupted. Furthermore, in "S" shaped pieces with no linear welding line for which the welding point constantly changes and the motors providing tracking in the two axes (X and Y) to which the welding torch is connected cannot properly respond to these changes of these materials may become scrap, unwanted repairs could be required, quality may decrease and loss of time may occur. In this study, a higher quality welding process in planar surfaces was realized by combining the laser path tracking system with Fuzzy Logic control algorithm for each of the axes (X-Y) in order to prevent these undesired situations. The designed system ensures that the X and Y motors take positions swiftly for abrupt changes in the welding seams on the profile, thus tracking the profile to be welded in the best way possible for a proper welding practice. The welding intersection results show that the practiced system yields very good results.Öğe The Effect of Prophylactic Melatonin Administration on Reperfusion Damage in Experimental Testis Ischemia-reperfusion(Maghira & Maas Publications, 2003) Öztürk, Ahmet; Baltacı, Abdulkerim Kasım; Moğulkoç, Rasim; Öztürk, BahadırAIM: Torsion of testis, which is a urologic emergency case, is generally treated by surgical detorsion procedure. However, the resulting reperfusion and both ipsilateral and contralateral testis damage caused thereby are important problems. This study aims at investigating the administration of prophylactic melatonin in order to reduce free radical damage that is caused due to reperfusion after experimental testis torsion-detorsion procedure. MATERIAL AND METHOD: The rats used in the study were allocated to four groups, each containing 10 rats. Rats in Group I had six hours of torsion (ischemia) followed by orchiectomy. Rats in Group II had six hours of torsion, then received melatonin (10 mg/kg/IM) and after that had detorsion (reperfusion). Rats in Group Ill had detorsion after six hours of torsion and serum physiologic administration (the same volume as melatonin). Torsion and/or detorsion procedures were not applied in Group IV (control). Ipsilateral, contralateral testis and plasma Malondialdehyde (MDA) levels were determined in all groups. RESULTS: Tissue and plasma MDA levels in the group which had detorsion were found to be significantly higher than those in the group that had orchiectomy only (p < 0.02). Ipsilateral and contralateral testis MDA levels were identified to be significantly lower in the group receiving prophylactic melatonin in comparison to the group receiving serum physiologic (p < 0. 02). Plasma and contralateral MDA levels correlated positively with MDA levels identified in ipsilateral testis in all groups (rs= +0.89, n=40, p=0.000). CONCLUSION: In cases where testis torsion is identified, administration of melatonin just before torsion may reduce local and systemic free radical damage.Öğe Effects of Zinc and Melatonin Deficiency on Testicular Tissue of Rats(Humana Press Inc, 2003) Öztürk, Ahmet ; Baltacı, Abdülkerim Kasım ; Bediz, Cem Şeref; Moğulkoç, Rasim ; Güngör, SalimThe present study was designed to investigate the effects of zinc and/or melatonin deficiency on rat testes. A total of 24 adult male Sprague-Dawley rats were used in this study The rats were divided into four groups of six rats each, as follows: (I) controls, (II) zinc deficient, (III) pinealectomized, zinc normal, and (IV) pinealectomized, zinc deficient. The plasma zinc levels in the control group were higher than in all the other groups (p < 0.01), and those of the zinc-deficient groups II and IV were significantly lower than for group III (p < 0.01). The melatonin levels in the controls were also significantly higher than for all other groups (p < 0.01) There was no significant difference in sperm production between the controls and the group of animals that had no epiphysis. A significant suppression was observed in the spermatogenetic activity of the zinc-deficient groups (p < 0.01). The suppression was higher in group II than in group IV. These results indicate that testicular damage caused by zinc deficiency may be reduced by melatonin deficiency.Öğe Effects of Zinc Deficiency and Supplementation on Malondialdehyde and Glutathione Levels in Blood and Tissues of Rats Performing Swimming Exercise(Humana Press Inc, 2003) Öztürk, Ahmet; Baltacı, Abdülkerim Kasım; Moğulkoç, Rasim; Öztekin, Esma; Sivrikaya, Abdullah; Kurtoğlu, Erdal; Kul, AylinThe aim of the study was to investigate the effects of zinc deficiency and supplementation on lipid peroxidation and glutathione levels in blood and in some tissues of rats performing swimming exercise. Forty adult male Sprague-Dawley rats were divided into four groups: group 1, zinc-deficient consisted of swimming rats; group 2 consisted of zinc-supplemented swimming rats; groups 3 and 4 were the swimming and nonswimming controls, respectively. The levels of malondialdehyde and glutathione were measured after 4 wk of zinc-deficient or zinc-supplemented diet and 30 min of swimming exercise daily. The erythrocyte glutathione levels of groups 2 and 4 were significantly higher than those of groups 1 and 3 (p<0.01). The plasma malondialdehyde level of group 1 was significantly higher than all other groups. The glutathione levels in liver, kidney, striated muscle, and testes of group 2 were higher than in the other groups (p<0.01) and higher in kidney and striated muscle of group 3 than in groups 1 and 4 (p<0.01). The tissue malondialdehyde levels of striated muscle, liver, kidney, and testes of group 1 were significantly higher than for all other groups (p<0.01). Our findings suggest that both swimming exercise and zinc deficiency result in an increase of lipid peroxidation in tissues and that zinc supplementation prevents these alterations by the activation of the antioxidant system.Öğe Enfekte ve Açık Yaraların Sağaltımında Kollajenaz Enzi?mi?ni?n Kullanılması Üzeri?ne Kli?ni?k Çalışmalar(Selçuk Üniversitesi, 1999) Arıcan, Mustafa; Öztürk, AhmetThis study involved application of collagenase in the treatment of infected and ulcerative wounds. For a matenal, patients consisted of 13 dogs (10 pointer and 3 German shepherd) and 4 horses (1 akhal teke, 1 arap and 2 english). All had varying types of wounds from superficial to ulcerated. Animals were brought for examination at the Gemlik Military Veterinary School Animal Hospital. In this study, topical collagenase was used only when routine met- hods had failed to heal the wound. Novuxol pomad was used on the wounds. After 7 days assessment of inflommation appeared reduced with wounds becoming smaller. By the 10th day all wounds had completely healed. Notably, epitheliazation had started on dermal edge of wounds by 4-5 days. Concluding that collagenase treatment can assist in wound healing were conventional methods have no succeeded.Öğe İstatistiksel kalite kontrol grafikleri kabul örneklemesi(Selçuk Üniversitesi Fen Bilimleri Enstitüsü, 2007-03-27) Öztürk, Ahmet; Genç, AşırÇağımızda ülkeler arasındaki rekabet savaşının arkasında kalite yönetimi ve kalite güvencesi yatmakta, bunu en iyi başarabilen ülke ekonomik açıdan lider koltuğuna oturmaktadır. Japonya işletmelerinde uyguladığı Toplam Kalite Yönetimi anlayışıyla bugün lider ülke konumuna gelmiştir. Milletlerin daha iyi yaşayabilme ihtiyacını karşılamaları , yaşam koşullarını koydukları kurallarla sürekli geliştirme çabaları gibi kalite kavramını bilen bir toplum oluşturmalarıyla gerçekleşmiştir. Yaşadığımız bu dönemde kalite kelimesini her yerde duymaktayız. Bu nedenle kalite bilincinin her sektör tarafından anlaşılır olması ve uygulamasının kesinlikle yapılıyor olması gereklidir. Bu sayede dünya firmalarıyla yarışıyor hale geleceklerdir. Çalışmanın 1. bölümünde , kalite ile ilgili bilgiler ve kavramlar, kalite kontrolün tarihi gelişimi, kaliteyi oluşturan temel unsurlar, kalite kontrolün amaçları, kalite kontrol faaliyetleri konuları işlenmiştir. 2.bölümde toplam kalite kontrol, toplam kalite kontrolün aşamaları, toplam kalite kontrolün kapsamı, toplam kalite kontrolün amaçları konuları ele alınmıştır. 3.bölümde statistiksel kalite kontrol, 4.bölümde örnekleme dağılımları ve tahmin etme uygulamalı örneklerle , 5.bölümde kabul örneklemesi, 6. bölüm de ise kontrol grafikleri anlatılmıştır.Öğe Kafkasya’dan Muş yöresine göçler ve göçmenlerin iskânı (1856-1905)(Selçuk Üniversitesi Türkiyat Araştırmaları Enstitüsü, 2018) Öztürk, Ahmet; Toprak, SerapKırım Savaşı’nda mağlup olan Rusya, Kafkas halklarının kendisine gerekli desteği vermediği gerekçesiyle bölge halkına yönelik baskı, şiddet ve asimilasyon politikaları yürütmeye başladı. Rusya’nın uyguladığı bu politikalar sonucunda bölge halkı tarihi, dini ve ekonomik bağları olan Osmanlı Devleti topraklarına göç etmek zorunda kaldı. Osmanlı Devleti topraklarına 1850’li yılların ilk yarısında bazı Kafkas ailelerin gönüllü olarak gelmesiyle başlayan göç hareketi, 1859 yılından itibaren yoğunluk kazanmaya başladı. 1862-1865 yılları arasında doruk noktasına ulaşan göçler, sonrasında azalma göstermeye başladı. Fakat 1877–1878 Osmanlı-Rus Savaşı’ndan sonra göç hareketinde tekrar artış görüldü. Çeşitli dönemlerde artış ve azalışlar gösteren bu göç hareketi, 20. yüzyılın ilk yıllarına kadar devam etti. 1850’lerin sonundan itibaren iskâna açılan Muş yöresine Kafkasya’dan gelen binlerce göçmen yerleşti. Bu çalışmada, Muş yöresini iskân bölgesi olarak tercih eden Kafkasya göçmenlerinin nüfus özellikleri, yerleşim yerleri ve göçmenlerin yöre halkı ile sosyo-ekonomik ilişkileri incelenmiştir.Öğe Kendilenmiş cin mısır hatlarının SSR primerler kullanılarak moleküler karakterizasyonu(2017) Öztürk, Ahmet; Sade, Bayram; Soylu, Süleyman; Erdal, Şekip; Boyacı, Hatice FilizÇalışmada; Batı Akdeniz Tarımsal Araştırma Enstitüsü (BATEM) ve Karadeniz Tarımsal Araştırma Enstitüsüne (KTAE) ait 35 adet kendilenmiş cin mısır hattı moleküler analize tabi tutulmuştur. Moleküler karakterizasyon için 21 adet SSR primeri kullanılmış ve hatlar arasındaki genetik uzaklıklar tespit edilmeye çalışılmıştır. Araştırma sonucunda; kümeleme analizi ile elde edilen dendograma göre cin mısır hatları 2 ana ve 5 alt gruba ayrılmıştır. Çalışmada kullanılan hatlar 0.44 ile 0.95 aralığında benzerlik göstermişlerdir. Çalışmada kullanılan hatlardan 9 ve 28 nolu hatlar yakın akraba bulunur iken, 1 ve 23 nolu hatların uzak akraba bulunmuştur. Elde edilen bu sonuca göre BATEM ve KTAE ait kendilenmiş cin mısır hatları arasında genetik olarak bir varyasyonun olduğu tespit edilmiştir.Öğe Management of a Colon Perforation During Pediatric Percutaneous Nephrolithotomy(MARY ANN LIEBERT INC, 2012) Göger, Emre; Güven, Selçuk; Gürbüz, Recai; Yılmaz, Kadir; Kılınç, Mehmet; Öztürk, AhmetPercutaneous nephrolithotomy (PCNL) is one of the most common treatment options in the management of kidney stones in children. While colon perforation during PCNL is reported as a rare complication in adults, there are scarce data regarding colon perforation during pediatric PCNL. We report the successful management of colon perforation occurring during PCNL and of a renal stone in a 6-year-old child. Moreover, we describe the procedure to be followed for colon perforation in children.Öğe Management of Multiple Stones in a Single Session Using Minimally Invasive Methods in Infants with Renal Failure: Renal Salvage(SPRINGER, 2012) Öztürk, Ahmet; Güven, Selçuk; Pişkin, Mesut; Kılınç, Mehmet; Çelik, Jale; Arslan, MehmetThe goal in the treatment of stone disease causing infantile obstructive uropathy is to obtain a quick resolution of the obstruction using the least invasive treatment modality available and rendering the patient stone-free, if possible. Two infants with bilateral kidney stones, the first of whom also had ureteral stone, were referred to our clinic with acute renal failure and were treated successfully in a single session using minimally invasive methods. In this report, we discuss the management of these two cases, aged 9 and 26 months, which resulted in favorable outcomes.Öğe Percutaneous Nephrolithotomy is Highly Efficient and Safe in Infants and Children Under 3 Years of Age(Karger, 2010) Güven, Selçuk; İstanbulluoğlu, Okan; Öztürk, Ahmet; Öztürk, Bülent; Pişkin, Mesut; Çiçek, Tufan; Kılınç, Mehmet; Özkardeş, Hakan; Arslan, MehmetObjective: We aimed to evaluate the efficacy and safety of percutaneous nephrolithotomy (PNL) in infants and small children (12-36 months). Methods: The PNL applications conducted in children <3 years of age in two centers were evaluated. Whereas pediatric PNL instrumentation was used in the first center, adult-size instrumentation was utilized in the second center. The complications were given according to the modified Clavien classification system. Results: The mean age of the patients was 22.76 months (5-36 months) and the mean body weight was 11.51 kg (6-15 kg). In twelve renal units, pediatric instrumentation was used and among these, two had miniperc. In the other eight renal units, adult-size instrumentation was employed. Except for the patient with complex renal stones, all patients were stone free after the intervention and none required a conversion to open surgery. There were grade 1-2 complications in 3 patients. The postoperative hemoglobin drop was greater in the children who underwent PNL with adult-size instrumentation. Conclusion: In this young age group, in addition to standard PNL, simultaneous bilateral PNL, tubeless PNL and in urgent cases of renal failure, urgent PNL, are safe and effective treatment modalities provided patients are selected properly and the surgeon performing the procedure has the necessary experience.Öğe PERCUTANEOUS NEPHROLITHOTOMY: HIGHLY EFFICIENT AND SAFE IN INFANTS AND CHILDREN UNDER AGE 3(MARY ANN LIEBERT INC, 2010) Güven, Selçuk; İstanbulluoğlu, Okan; Öztürk, Ahmet; Öztürk, Bülent; Pişkin, Mesut; Çiçek, Tufan; Kılınç, Mehmet; Özkardeş, Hakan; Arslan, Mehmet[Abstract not Available]Öğe Prévalence De L'hypertrophie Bénigne De La Prostate Chez Les Hommes Turcs Hopitalisés en Urologie(2000) Öztürk, Ahmet; Serel, Tekin Ahmet; Koşar, Alim; Keçelioğlu, MuzafferButs: La prévalence de l'hypertrophie bénigne de la prostate (HBP) clinique est connue dans les pays d’Europe de l’Ouest et dans le continent nord-américain. Par contre, des données épidémiologiques manquent en ce qui concerne les Balkans. Le but de cette étude est de rechercher quelle est la prévalence de l’HBP dans cette région. Méthodes: Nous avons analysé les données recueillies sur les malades atteints de l’HBP de la part des urologues de quarante-huit hôpitaux de Turquie, en 1996. L’analyse porte sur 84149 dossiers pour des patients âgés de 40 à 80 ans et plus. Résultats: La prévalence globale de l'HBP clinique était de 18.5%. La prédominance d'age-spécifique de l’HBP était à son maximum dans la catégorie des 60-69 d'âge. Le choix d'un traitement médical est majoritaire dans la prise en charge de l’HBP (54,7% des cas). Conclusion: Ce travail est le premier rapport concernant la prévalence de l’HBP clinique en Turquie. Mais il faudra l'affiner pour connaître la prévalence de l’HBP clinique par rapport à l'âge, au pays et à la race dans les Balkans et au Moyen-Orient.Öğe Risk Factors for Depression in Postnatal First Year, in Eastern Turkey(OXFORD UNIV PRESS, 2002) İnandı, Taceddin; Elçi, Omur Çınar; Öztürk, Ahmet; Eğri, Mücahit; Polat, Aytaç; Şahin, Tahir K.Background There are few studies reporting depression in the postnatal period in developing countries. In this study our objective was to evaluate women from eastern Turkey in the postnatal one-year period in order to analyse the risk factors for depression. Methods In this cross-sectional, multi-centre study, we selected a study sample from five eastern provinces. Among 2602 randomly selected women who gave birth within the last year, we included 2514 women in our analysis. The Edinburgh Postnatal Depression Scale was used for the evaluation of depression. Results The percentage of women with high depression scores was 27.2%. Excess risk of depression was associated with several factors including unemployment, low education, poverty, poor family relations, low marital age, lack of medical services, and mental health problems. Conclusions Depression in postnatal women is an important public health problem in the less developed eastern part of Turkey.Öğe Treatment of complete urethral obstruction by using pneumatic lithotripsy in a dog: A preliminary report(2016) Maden, Mehmet; İder, Merve; Parlak, Kurtuluş; Öztürk, AhmetBu olgu sunumunda bir köpekte tam üretral obstrüksiyonun tedavisinde minimal invaziv sistoskopik pnömatik litotripsi tekniğinin kullanımı anlatıldı. Olgunun hayvan materyalini idrar yaparken zorlanma ve son iki gündür idrar yapamama şikâyetleri ile getirilen, postrenal azotemia ve hematuria tespit edilen Chihuahua ırkı, 5 yaşlı bir köpek oluşturdu. Tam üretral obstrüksiyona neden olan üretral taşlar sistoskopi ile görüntülendi, pnömatik litotriptör kullanılarak parçalandı ve taş fragmanları voiding urohydropulsiyon yöntemiyle dışarıya alındı. Sonuç olarak, pnömatik litotripsi yöntemi tam üretral obstrüksiyonun tedavisinde başarılı bir şekilde kullanıldı.
