A look ahead approach to secure multi-party protocols

Secure multi-party protocols have been proposed to enable non-colluding parties to cooperate without a trusted server. Even though such protocols prevent information disclosure other than the objective function, they are quite costly in computation and communication. Therefore, the high overhead makes it necessary for parties to estimate the utility that can be achieved as a result of the protocol beforehand. In this paper, we propose a look ahead approach, specifically for secure multi-party protocols to achieve distributed k-anonymity, which helps parties to decide if the utility benefit from the protocol is within an acceptable range before initiating the protocol. Look ahead operation is highly localized and its accuracy depends on the amount of information the parties are willing to share. Experimental results show the effectiveness of the proposed methods

Effects of spacing and post-planting treatments on survival and growth of Fraxinus angustifolia seedlings

This study was conducted at a bottomland hardwood site with heavy textured soil in Akyazi, Turkey to determine the effect of initial spacing (3.0 x 3.0, 3.0 x 2.0, 2.5 x 1.6 and 2.5 x 1.2 m) and post-planting treatments (untreated check, moving, hoeing, disking, and hoeing plus disking) on early survival and growth,of Fraxinus angustifolia Vahl. One-year old bare-root seedlings (70 +/- 5 cm in height) were hand-planted in December 2004. Through three years survival was perfect with a rate of 98% in all treatments. Spacing and the interaction between spacing and post-planting treatment did not significantly affect seedling growth through three years. However, height and diameter growth increased overtime and differed significantly among post-planting treatments. The hoeing and hoeing plus disking treatments gave the highest growth, and resulted in about 31% increase in diameter and height increment, and in total diameter and height about 20%. These results suggest that post-planting treatments on bottomland sites with heavy textured soil give promising results

The fictive archive: Kurdish filmmaking in Turkey

In this paper, I consider the potentials and theoretical interpretations of Kurdish Cinema produced in Turkey. I evaluate the dynamics of the emergence of a state-less Kurdish cinema, which produces films in spite of the existence of Turkish National cinema and an oppressive Turkish national identity. Using Hayden White’s formulations on narrative and history and Gilles Deleuze’s theories on minority filmmaking and the time-image, I argue that the conception of time in Kurdish Cinema exceeds the time of the narrative and carries an archival potential for the unrepresented history of Kurdish life in Turkey

Synchronization of lai-chen (2016) chaotic system with active control

Most of the events in the real world show non-linear behavior. Such events are usually chaotic. Chaotic systems are highly sensitive to the initial conditions and parameters values, exhibit non-periodic properties, and some have a very broad frequency spectrum. Because of these features, chaotic systems are used in different branches of science such as encryption, communication, random number generators, prediction algorithms, computer games, biology, medicine. In this regard, a variety of chaotic and hyper-chaotic systems are introduced in the literature. However, because of chaotic systems are very sensitive to initial conditions and parameters, chaotic systems need to be synchronized in order to be used in chaos-based communication and encryption applications. In this study, a new chaotic system presented by Lai and Chen in 2016 was synchronized with active control method. Consequently, it is shown that the Lai-Chen chaotic system can be synchronized and used in chaos-based communication and encryption applications

The isolation of Esherichia coli O157:H7 in milk and feaces of cattle in eagean region and determination of their verotoxin

Escherichia coli O157:H7 ilk kez 1982 yılında ABD de meydana gelen 2 ayrı hemorajik kolitis salgını sonucu tanımlanmaya baslamıstır ve en sık izole edilen enterik patojenlerden biridir. E. coli O157:H7 ile infekte olan kisiler asimptomatik olabilir, kanlı yada kansız diare, hemolitik üremik sendrom ve trombotik trombositopenik purpura semptomları gösterebilir. Shiga-benzeri toxin üreten Escherichia coli (STEC), Vero toxin-üreten E.coli (VTEC) olarak ta adlandırılır, infeksiyonu gıda kaynaklıdır ve sıgırlar STEC infeksiyonunun birincil rezervuarı olarak belirtilmektedir. Çalısmamızda, Ege bölgesinde bulunan sıgırlardan alınacak süt ve dıskı örneklerdeki E. coli O157:H7 bakterisinin varlıgı ve verotoksin üretip üretmediginin belirlenmesi amaçlanmıstır. Bu çalısmada, incelenen 150 süt ve 150 dıskı örneginden 2 si süt diger 2 si ise dıskı örneklerinden olmak üzere 4 (%1,3) E. coli O157:H7 izole edildi. Süt örneklerinden izole edilen suslardan 1’inin VT1 ürettigi belirlendi.Escherichia coli O157:H7 was first identified as a human pathogen following two geographically separate outbreaks of hemorrhagic colitis in the United States in 1982. E. coli O157:H7 was one of the most common enteric pathogen isolated. Persons infected with E. coli O157:H7 may be asymptomatic, symptoms may include diarrhea, bloody diarrhea, hemolytic-uremic syndrome, and thrombotic thrombocytopenic purpura. Shiga-like toxin- producing Escherichia coli (STEC), also known as Vero toxin-producing E. coli (VTEC), infection in humans is food-borne and that cattle act as a reservoir for STEC infection. The aim of this study was, investigate the presence of E. coli O157:H7 in milk and faeces of cattle that taken from Aydın and zmir region and determine their verotoxin production capability. In this study, 4 (%1,3) E. coli O157:H7 isolated from 150 milk and 150 faeces. Two E. coli O157:H7 isolated from both milk and faeces sample and we determine that one of the isolate taken from milk produce VT1

Determination of age and some growth parameters in different populations of Ommatotriton ophryticus (Berthold, 1846) (Caudata: Salamandridae) (northern banded newt)

Ommatotriton ophryticus'un Türkiye'de yaşayan üç populasyonuna ait örneklerin vücut büyüklükleri ölçülmüş ve iskelet kronolojisi yöntemi uygulanarak yaşları tayin edilmiştir. Bireylerin yaşları parmak kemiklerinden alınan enine kesitlerdeki yaş halkalarının (LAG) sayılması yoluyla belirlenmiştir. Vücut büyüklüğü (SVL) erkeklede 58.41-85.78 mm, dişilerde ise 50.33-71.56 mm arasında değişmekte olup populasyonlar arasında benzerlik göstermektedir. Tüm populasyonlarda erkek bireyler dişi bireylerden daha büyüktür. Erkek bireylerin ergenliğe 4-6 yaşlarında, dişi bireylerin ise 5-6 yaşlarında ulaştıkları tespit edilmiştir. Tüm populasyonlarda erkek ve dişi bireylerin ortalama yaşları birbirine benzer olup istatistiksel olarak önemli bir fark tespit edilmemiştir. Maksimum yaş ya da yaşam uzunluğu erkeklerde 9-12 yıl, dişilerde ise 9-10 yıl arasında değişmektedir. Tüm populasyonların hem erkek hem de dişi bireylerinde yaş ile vücut büyüklüğü (SVL) arasında pozitif bir ilişki olduğu tespit edilmiştir. Bu çalışmada, Ommatotriton ophryticus populasyonları arasında yaş ve büyüklük bakımından (6, 7 ve 8. yaş sınıfları) farklılık olduğu tespit edilmiştir. Ancak bu farklılığın yükseklik ve coğrafi konuma bağlı olarak meydana geldiğini söylemek zordur. Bu nedenle yaş ve vücut büyüklüğünün, predasyon, agresif rakipler, besin gibi başka ekolojik faktörlerden etkilenmiş olabileceği düşünülmektedir.Body size of newts from three populations of Ommatotriton ophryticus in Turkey was measured and the age of the newts was estimated using skelotochronological method. Age was determined individually by counting the number of restling lines (LAG) in cross-sections taken from phalanges. Body size (SVL) is similar among populations ranged between 58.41-85.78 mm in males and 50.33-71.56 mm in females. Males are significantly bigger than females in all populations. Age at maturity was determined as 4-6 years in males and 5-6 years in females. The average age of males and females in all populations was similar and did not significantly differ. Maximum age or longevity was ranged from 9 to 12 years in males and 9 to 11 years in females. Positive correlation between body size (SVL) and age was determined for both males and females in all populations. In this study, significant difference was determined among populations of Ommatotriton ophryticus in terms of age and body size (6, 7 and 8 age classes). However, it was difficult to say that these differences resulted from geographic positions or altitudes of localities. For this reason, the age and body size is tought to be effected by other ecological factors such as predation, aggressive competitors, food etc

Effects of Malfunctions in Supply Chain Management on Company Revenues

This paper presents issues related to the effects of malfunctions in supply chain management on company revenues and profits. Case problems are presented that show the remarkable effects of supply chain management on company operations. The necessary steps that should be followed to improve company operations through appropriate supply chain management are also presented.Â

FPAA based desıgn and implementation of sprott N chaotic system

Nowadays, chaotic systems are used in various studies of different disciplines. Today, chaotic systems are used in various studies of different disciplines. In the literature, chaotic systems with various features have been introduced up to the present. In order to use these new chaotic systems in real-world engineering applications such as encryption, secure communication and authentication, they must be realized besides numerical simulations. In the literature, analog chaotic system implementations have been realized mainly with OPAMP devices. FPGAs and microcontrollers are used mostly in digital designs of chaotic systems. In this study, FPAA (Field Programmable Analog Array) based design and realization of Sprott N chaotic system was carried out. FPAA based design and numerical simulation results confirmed each other. As a result, it has been shown that the Sprott N chaotic system can be used based on FPAA in various engineering applications.Nowadays, chaotic systems are used in various studies of different disciplines. Today, chaotic systems are used in various studies of different disciplines. In the literature, chaotic systems with various features have been introduced up to the present. In order to use these new chaotic systems in real-world engineering applications such as encryption, secure communication and authentication, they must be realized besides numerical simulations. In the literature, analog chaotic system implementations have been realized mainly with OPAMP devices. FPGAs and microcontrollers are used mostly in digital designs of chaotic systems. In this study, FPAA (Field Programmable Analog Array) based design and realization of Sprott N chaotic system was carried out. FPAA based design and numerical simulation results confirmed each other. As a result, it has been shown that the Sprott N chaotic system can be used based on FPAA in various engineering applications

Analog electronic circuit design of the Cao 4D hyperchaotic finance system

Chaotic and hyperchaotic systems have been used in different fields of science in recent years. Many chaotic and hyperchaotic systems with different behaviors have been introduced in the literature. Especially in chaotic system based encryption, random number generator and communication applications, hyperchaotic systems are more preferred because of their more complex characteristics. The chaotic and hyperchaotic systems introduced in the literature are generally presented only as numerical simulation. However, it is necessary to design the electronic circuit for the use of the systems in real applications. In this study, numerical simulation results of four-dimensional (4D) hyperchaotic finance system introduced by Cao in 2018 were obtained and then analog electronic circuit design was realized. Numerical simulation results and designed electronic circuit outputs have confirmed each other. As a result, it is ensured that Cao 4D hyperchaotic finance system can be used in real engineering applications

Microcontroller-based random number generator implementation by using discrete chaotic maps

In recent decades, chaos theory has been used in different engineering applications of different disciplines. Discrete chaotic maps can be used in encryption applications for digital applications. In this study, firstly, Lozi, Tinkerbell and Barnsley Fern discrete chaotic maps are implemented based on microcontroller. Then, microcontroller based random number generator is implemented by using the three different two-dimensional discrete chaotic maps. The designed random number generator outputs are applied to NIST (National Institute of Standards and Technology) 800-22 and FIPS (Federal Information Processing Standard) tests for randomness validity. The random numbers are successful in all tests