Yeni bir kaos tabanlı rasgele sayı üretici kullanan banka şifrematik cihazı tasarımı ve uygulaması

06.03.2018 tarihli ve 30352 sayılı Resmi Gazetede yayımlanan “Yükseköğretim Kanunu İle Bazı Kanun Ve Kanun Hükmünde Kararnamelerde Değişiklik Yapılması Hakkında Kanun” ile 18.06.2018 tarihli “Lisansüstü Tezlerin Elektronik Ortamda Toplanması, Düzenlenmesi ve Erişime Açılmasına İlişkin Yönerge” gereğince tam metin erişime açılmıştır.Bu tez çalışmasında, uluslararası en üst standart olan istatiksel NIST-800-22 rasgelelik testlerinden başarı ile geçirilen kaos tabanlı yeni bir Rasgele Sayı Üreteci(RSÜ) yardımı ile şifre üretme algoritması geliştirmek, donanım tabanlı şifrematik uygulaması yapmak ve örnek bir bankacılık sistemi arayüz programı üzerinde test etmek amaçlanmıştır. Rasgele sayı üretici tarafından oluşturulan bitler vasıtasıyla yeni bir şifre üretme algoritması geliştirilmiştir. Bu algoritma için gerekli olan dönüşüm tablosu hazırlanmıştır. Daha sonra bu algoritma ile öncelikle bilgisayar ortamında şifreler üretilmiştir. Ardından aynı şifrelerin elektronik devre ortamında gerçeklenmesi için, gerekli bitlerin bilgisayar ortamında kodlanması amaçlanmıştır. Sonrasında C dilinde mikrodenetleyicinin yazılımsal olarak programlanması yapılmıştır. Daha sonra bu programın mikrodenteleyici belleğine yüklenerek; LCD panel üzerinde şifrelerin görüntülenmesi amaçlanmıştır. Son olarak şifrematik cihazınca üretilen şifrelerin test edilmesi maksadıyla, örnek bir bankacılık sistemi kullanıcı arayüz programı tasarımı gerçekleştirilmiştir.This thesis study aims to develop a password generation algorithm with the help of a new chaos based Random Number Generator (RNG) that has successfully passed statistical NIST-800-22 randomness tests which are the internationally highest standard as well as to conduct a hardware based Authenticator application and to test it on a sample banking system interface program. A new password generation algorithm was developed via the bits generated by random number generator. Conversion table required for this algorithm was prepared. Following this, primarily passwords were generated on computer through this algorithm. Then, necessary bits were aimed to be coded on computer so as to realize the same passwords on electronic environment. Next, software programming of the microcontroller was carried out in C language. As the following step, this program was uploaded to the memory of the microcontroller and thus visualization of passwords on the LCD panel was purposed. Finally, in order to test passwords generated by authenticator device, a sample internet banking user interface program was designed

State aids and its economic effects in Turkey and European Union

Sübvansiyon konusu 1947 yılında imzalanan GATT anlaşmasında yer almış, 1994 yılında WTO Anlaşması'nda Sübvansiyonlar ve Telafi Edici Önlemler Anlaşması olarak daha geniş bir kapsama kavuşmuştur. Avrupa Kömür ve Çelik Birliği ve Avrupa Ekonomik Topluluğu Anlaşmaları ise devlet yardımları kavramını ortaya çıkarmıştır. kinci Dünya Savaşı'nı izleyen yıllarda devlet yardımları genel olarak tüm ülkelerde 1970 sonlarına dek yükselmiş, 1980'li yıllarda sıkı bütçe politikalarıyla istikrar kazanmış, 1990'larda ise azalan bir eğilim göstermiştir. Devlet yardımlarının dağılımında 1980'li yıllarda gerileyen sanayilere yardım ve bölgesel yardımlar ön plana çıkarken, günümüzde ise bölgesel gelişme yardımları ile birlikte teknoloji veya araştırma geliştirme, eğitim, istihdam, çevre koruma gibi yatay amaçlı yardımlar öne çıkmaktadır. Subsidy issue has taken place in GATT agreement (General Agreement on Tariffs and Trade) signed in 1947, and extended scope in WTO and SCMA agreements in 1994. Agreements of European Coal and Steel Community and European Union have formed the state aid concept. In the following years of World War II, using of state aids had increased in almost every country till the ends of 70?s, and had gained constancy with the tight budget policies in 80?s, but has shown a tendency to decrease in 90?s. The State Aids have been primarily given to industries on downfall and regional supports in 80?s. The focus of today?s state aids are mostly on social aims such as regional improvement supports, technology or Research and Development, education, employment, environmental issues

Evaluation of the lamina cribrosa in patients with multiple sclerosis using enhanced depth imaging optical coherence tomography

Multiple sclerosis (MS) is a demyelinating disease of the central nervous system. Optic neuritis (ON) is common clinical manifestation of MS. Spectral domain optical coherence tomography (SD-OCT) has been used as a useful tool to quantify the neuronal damage in the eyes of MS patients. The study aimed to evaluate the lamina cribrosa thickness (LCT) and lamina cribrosa depth (LCD) in patients with MS and their relationship with Expanded Disability Status Scale (EDSS) score. Fifty-two eyes of 26 relapsing-remitting MS patients and 39 eyes of 39 healthy age- and sex- matched participants were evaluated in this prospective, cross-sectional, observational study. There were two MS subgroups: 38 MS eyes without an ON history (MS−ON), and 14 MS eyes with an ON history (MS+ON). The LCT and LCD were measured with SD-OCT. Of the 26 participants with MS, 14 (53.8%) were female and the mean (SD) age was 35.1 (6.2) years; of the 39 healthy controls, 26 (66.7%) were female and the mean (SD) age was 36.7 (8.2) years (P=0.19 for sex and P=0.27 for age). The mean LCT was not significantly different between MS patients and healthy controls (272.66 ± 33.52 μm and 272.58 ± 35.97 μm, respectively, P=0.992). The mean LCD was 325.15 ± 67.07 μm for the MS+ON group, 409.71 ± 93.18 μm for the MS−ON group, and 427.64 ± 91.65 μm for the healthy control group. The LCD was significantly decreased in MS+ON group compared to MS−ON group (P=0.011) and healthy controls (P=0.002). EDSS score was negatively correlated with LCD in MS patients (r= -0.313, P=0.025). This study revealed decreased LCD in MS eyes particularly with optic neuritis, and its relationship with increased disease severity. Additional longitudinal studies are needed to confirm the use of LCD as an imaging biomarker in patients with MS. [Med-Science 2018; 7(4.000): 867-72

Effect of nebivolol on endothelial dysfunction in patients with Behcet's disease; a prospective single-arm controlled study

Objective: Behcet's disease (BD) is a systemic vasculitis, capable of involving all types of vessels. Endothelial dysfunction (ED) has been previously documented in BD. Previous studies showed that nebivolol might improve endothelial functions in endothelial dysfunction. The aim of our study is to assess the effects of nebivolol on endothelial dysfunction in patients with Behcet's disease

Removal of Basic Dyes from Aqueous Solutions by Crosslinked-Acrylic Acid/Acrylamidopropane Sulfonic Acid Hydrogels

In this study, Acrylic acid (AA)/2-acrylamido-2-methlypropane sulfonic acid (AMPS) hydrogels were prepared by free radical polymerization in aqueous solutions of AA, AMPS, and N,N-methylenebisacrylamide (NMBA) as crosslinker. Potassium persulfate (PPS)/potassium bisulfide (PBS) were used as initiator and accelerator pair. The water absorption capacities and dye adsorption properties of the hydrogels were investigated. Adsorption properties of the hydrogels, were evaluated by depending on different adsorption conditions such as different initial dye concentration and contact time. The concentrations of the dyes were determined using UV/Vis Spectrophotometer at wavelength 530 nm for safranine T (ST) and 622 nm for brilliant cresyl blue (BCB). Adsorption kinetic studies showed that pseudo-first order kinetic model is suitable to explain the adsorption kinetic data of the hydrogels. Langmuir and Freundlich isotherm models were used to describe adsorption data. The result revealed that the adsorption of basic dyes onto hydrogels fit very well both Langmuir and Freundlich isotherms. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 114: 1150-1159, 200