Determination Of Irrigated Parcel By Using Unmanned Air Vehicle and Remote Sensing Technology

Büyük yatırımlar ile gerçekleştirilen sulama sistemlerinin geleneksel yöntemler ile izleme-değerlendirme faaliyetlerinde birçok problemlerle karşılaşılmaktadır. Son yıllarda, birçok sektörde olduğu gibi sulama faaliyetlerinin izleme-değerlendirmesinde de sahip olduğu yetenekler nedeniyle Uzaktan Algılama (UA) teknolojilerinden yaygın olarak yararlanılmaktadır. Bu teknolojiler içerisinde en yenisi İnsansız Hava Araçları (İHA)’dır. Ancak, ülkemizde sahip olduğu yeteneklere karşı İHA’lardan tarımsal faaliyetlerde istenilen düzeyde faydalanılmamaktadır. Bir çok alanda olduğu gibi sulama uygulamalarında da İHA teknolojisinden fayda sağlayacak uygulamaya dönük araştırmalar bu konuda yaşanan problemlerin giderilmesinde büyük önem arz etmektedir. Bu çalışmada, DSİ 11. Bölge Müdürlüğüne bağlı 113. Şube Müdürlüğü hizmet alanı içerisinde yer alan 2.111,9 da araziye sahip Temrezli sulama sahasında sulama faaliyetlerinin izlenmesinde İHA’ların kullanım olanakları araştırılmıştır. Çalışmada, 2017 yılı için bir yandan multispektral kamera görüntüleri ile mevcut bitki deseni saptanmış bir yandan da termal ve multispektral kamera görüntüleri ile sulama faaliyetleri incelenmiştir. Araştırma sonucunda sulama sahasındaki bitki deseninin; Buğday %47,0, Ayçiçeği %36,6, Çeltik %6,9, Şekerpancarı %4,1, Yem bitkisi %3,7, Mısır %1,5 ve Sebze %0,3 olarak gerçekleştiği belirlenmiştir. Bu bitkiler içerisinde Mısır, Şekerpancarı, Çeltik, Sebze ve Yonca sulu tarım koşullarında yetiştirildiği belirlenmiştir. Araştırmada elde edilen bu sonuçlar üzerine yapılan değerlendirmede ise İHA’ların tarımsal alanlardaki sulama faaliyetlerinin incelenmesinde etkin bir araç olarak kullanılabileceği ortaya konmuştur. Bu çalışmanın kullanılan ekipman ve metot açısından ulusal ve uluslararası düzeyde literatüre katkı sağlaması beklenmektedir.Many problems are encountered in monitoring and evaluation of irrigation systems activities by using traditional methods. In recent years, Remote Sensing (RS) technologies have been widely used due to the capabilities of monitoring and evaluating irrigation activities. The most recent of these technologies is Unmanned Aerial Vehicles (UAV). However, UAVs are not utilized at the desired level in agricultural activities against the capabilities they have in our country. As in many fields, application-oriented researches that will benefit from UAV technology in irrigation applications are of great importance in eliminating the problems experienced in this regard. In this study, the utilization possibilities of UAVs for monitoring irrigation activities in Temrezli irrigation system which has 2111.9 da land in the 113th Branch Directorate service area under the 11th Regional Directorate of DSI were investigated. Primarily, the current crop pattern for 2017 was determined by multispectral camera images. Then irrigation activities were examined with thermal and multispectral camera images. Crop pattern in the irrigation field was determined as Sunflower 36.6%, Rice 6.9%, Fodder 3.7%, Sugar beet 4.1%, Corn 1.5%, Wheat 47%, Vegetable 0.3%. On the other hand, irrigated crops were identified as Corn, Sugar Beet, Rice, Vegetable and Alfalfa. As a result of the study, it has been shown that UAVs can be used as an effective tool in the investigation of irrigation activities in irrigation fields. This study is expected to contribute to the national and international literature in terms of equipment and method used

Konjenital kolesteatom: Vaka sunumu

Konjenital kolesteatom sağlam kulak zarı arkasında beyaz kitle ile karakterize nadir, görülen bir kulak hastalığıdır. Orta kulakta yer alan epidermoid kalıntılardan kaynaklandıkları düşünülmektedir. Bu yazıda konfenital kolesteatomlu bir vaka sunularak hastalığın prezentasyonu, lokalizasyonu ve tedavisi tartışılmıştır.Congenital cholesteatoma is a rare entity characterized by a white mass behind an intact tympanic membrane. It arises from ectopic epidermoid remnants in the middle ear. In this article, a case of congenital cholesteatoma is discussed with regard to the presentation, localization and treatment of the disease

The effects of stacking sequence on drilling machinability of filament wound hybrid composite pipes: Part-1 mechanical characterization and drilling tests

WOS:000518706900003In the first part of this two-part comprehensive study, mechanical properties and machinability characteristic of filament wound hybrid composite pipes with various stacking sequences of glass and carbon fibers (Glass-Carbon-Glass (GCG), Carbon-Glass-Glass (CGG), and Glass-Glass-Carbon (GGC)) were investigated experimentally. In order to determine the mechanical properties of the pipes, hardness test (Shore D), ring tensile test (ASTM D2290), and burst test (ASTM D1599) were carried out. Machinability tests were performed at various feed rates (50, 150, 250 and 350 nun/min) and spindle speeds (796, 1592, 2388 and 3184 rpm) using with and without a back-up. The results showed that stacking of the carbon layer between two glass layers (GCG) presented better performance in terms of mechanical properties and machinability characteristic. The maximum ring tensile stress of GCG specimen is 27% and 19% higher than those of GGC and CGG specimens, respectively. On the other hand, the lowest thrust forces measured during the drilling of GCG specimen while the GGC represented highest values. In addition, the use of back-up led to an increase in thrust force. The highest increase was observed in GGC sample. In GGC sample, a change in a spindle speed increased thrust force by 18-35%, while a change in feed rate increased thrust force by 20-30%

The effects of stacking sequence on drilling machinability of filament wound hybrid composite pipes: Part-2 damage analysis and surface quality

WOS:000508631700060In the first part of this two-part study, filament wound hybrid composite pipes with various stacking sequences were manufactured and mechanical properties such as hardness, ring tensile strength, and burst strength were experimentally investigated. After determining mechanical properties, drilling tests were performed to research machinability characteristics. The second part of the study consists damage analysis and surface quality examination including ring test damage analysis, push-out delamination analysis, borehole damage examination and borehole surface quality. The experimental data suggested that cutting parameters, stacking sequence, and the use of back-up were impactful on the formation and propagation of various types of damages. Especially, the effect of stacking sequence was remarkable. A larger delamination area was formed in Glass-Glass-Carbon (GGC) sample after the ring tensile tests compared to Glass-Carbon-Glass (GCG) and Carbon-Glass-Glass (CGG) samples. In all cases, the utilization of back-up lead to decrease of delamination with 9-40% reduction in surface roughness. When the back-up is not used during drilling, an excessive push-out delamination occurred in all drilling tests. Moreover, CGG samples represented lower push out delamination. In addition, position of the hole depending on the winding angle plays a key role on damage formation and surface quality