This paper focuses on the dynamic behavior of variable-span morphing wings (VSMW) oscillating in pitch and plunge motions under subsonic flight conditions. The unswept cantilevered wing is modeled as three-stepped Euler-Bernoulli beam. The aerodynamic loads acting on the wing are represented by Theodorsen's unsteady aerodynamic theory. The differential equations of motion that describe the behavior of the dynamics of Euler-Bernoulli beam are derived through the Hamilton's principle. The differential transformation method (DTM) is implemented to equations of motion and boundary conditions. The solution of the aeroelastic system is obtained by the classical frequency domain solution, k-method. Goland wing and High-Altitude Long-Endurance (HALE) wing are used as the basis for this study. Prior to analyzing flutter characteristics of VSMW, validation cases are conducted to ensure that the developed algorithm works well. Furthermore, flutter speed and flutter frequency are analyzed for different elongation ratios of wing. There is a significant difference in flutter values of fully retracted and fully extended wing configurations. It can be concluded that both flutter speed and flutter frequency decrease dramatically as wing span extends. Another important finding is that the flutter speed and flutter frequency reductions are relatively high at the initial stages of wing span extension.
In this study, the clinical progress and the treatment results of cases Istanbul University, Faculty of Veterinary Medicine, Department of Surgery with a complaint of stilted gait, pain, lameness, reluctance to move, kyphosis and miniature appearance have been evaluated. The study materials included eleven Scottish Fold cats. The cases underwent conservative and surgical treatment due to severity of osteochondrodysplasic lesions. The aim of this study is to draw attention to this illness of homozigot and heterozigot Scottish Fold cats whose population is increasing dramatically in our country, to stop the uncontrolled mating of this breed and also to share our foundings and results with our colleauges. Keywords: Scottish Fold osteochondrodysplasia, Cat Scottish Fold Kedilerde Kalıtsal Osteokondrodisplazi ÖzetBu çalışmada, İstanbul Üniversitesi Veteriner Fakültesi Cerrahi Anabilim Dalı'na hareket etmede isteksizlik, tutuk yürüyüş, topallık, arka bacaklarında şişlik, kifozis ve minyatür görünüm gibi şikayetlerle getirilen, tanısı kalıtsal osteokondrodisplazi olan, onbir adet Scottish Fold kedinin klinik durumları ve sağaltım sonuçları değerlendirilmiştir. Olgulara osteokondrodisplaziye bağlı lezyonların şiddetine bağlı olarak konservatif ve/veya cerrahi sağaltım uygulanmıştır. Bu çalışmayla, ülkemizde sayıları giderek artmakta olan Scottish Fold kedilerindeki kalıtsal nitelikli bu hastalığa dikkat çekmek, kontrolsüz çiftleşmelerin engellenmesini sağlamak ve ilaveten sağaltım seçeneklerinin bulgu ve sonuçlarını meslektaşlarımızla paylaşmak amaçlanmıştır.
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