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Studies of Intermittently connected delay tolerant wireless sensor networks (ICDT-WSNs) are a new field gaining more popularity for various new applications. These networks are an integration of both wireless sensor networks (WSNs) and delay tolerant networks (DTNs). ICDT-WSNs like the WSN have limited resources and like DTNs have intermittent connections. Traditional wireless sensor networks are appropriate for applications that have an end-to-end connection between the source and destination nodes, but they are not suitable for some applications that have not end-to-end connections between source and destination nodes and have intermittently connected. ICDT-WSNs designed for these types of applications. By recognizing the characteristics of these networks, different applications can offer to them. Surveying of these applications can be led to identify the core needs of ICDT-WSNs and propose efficient protocols for ICDT-WSNs. This paper summarizes and compares some applications of ICDT-WSNs and characteristics and requirements.

International Congress on 3D Printing (Additive Manufacturing) Technologies and Digital Industry
3D-PTC2019

Ercüment Öztürk Nader EBRAHIMPOUR Tuğrul Çavdar

Today, the connections between vehicles and their surroundings are limited. However, with the development of the Internet of Things (IoT) and the new technological developments, there have been serious progresses in the Internet of Vehicles (IoV), and vehicle manufacturers have made various studies in this subject. However, these studies generally suggest a link between cars and users. Today, most of the studies do not refer to the connection between vehicles or the vehicle and its environment, so it is necessary to carry out such a study. In this study, it is aimed to establish an ad-hoc network between vehicles and their environments to optimize the number of vehicles to be accommodated in this temporary network. However, it is aimed to share traffic flow and speed information by communicating the vehicles in urban traffic. In this sense, there is no speed and direction limitations in the transient network to be created between vehicles without a specific limitation. Simulation studies have been carried out on the optimization of the network by considering the problems such as; use of the bandwidth efficiently and the removal of the interference problems in the communication between the vehicles and their environments. In order to solve these problems, Artificial Neural Network and Simulated Annealing (SA) algorithms are used to optimize the number of vehicles to be included in the ad-hoc network in the simulations, which performed in MATLAB environment.

International Congress on 3D Printing (Additive Manufacturing) Technologies and Digital Industry
3D-PTC2019

Ercüment Öztürk Ahmet Ulu Tuğrul Çavdar

Mobil cihazlarda son zamanlarda yaşanan teknolojik gelişmeler patlayıcı bir gelişime neden olmuştur. Bununla birlikte günümüzde telefon kullanıcı sayısı milyarlara ulaşmıştır. Bu durum beraberinde mobil cihaz içerikli yapılan suçlarda da bir artışa sebep olmuştur. Özellikle akıllı telefonların kullanımı ile birlikte banka hesabı yönetimi, e-ticaret vb. işlemlerin bu cihazlar üzerinden yapılması, kötü kişiler için mobil cihazları daha cazip hale getirmiştir. Sonuç olarak, akıllı telefonlarda bulunan verilerin korunması için yüksek güvenirliliğe sahip mekanizmalara olan ihtiyaç artmıştır. Mobil cihazlarda kimlik doğrulama için en çok kullanılan 3 farklı yöntem vardır. Bunlardan birincisi parola sorgulamasıdır. Genel olarak bu tür güvenlik kontrolleri gizli bilgi tabanlı olarak kabul edilmektedir. İkinci olarak ise jeton tabanlı (token-based) yöntemler söylenebilir. Son olarak günümüzde çokça tercih edilen biyometrik tabanlı yaklaşımlar kullanılmaktadır. Biyometrik tabanlı yöntemler kendi içerisinde fiziksel ve davranışsal olarak ikiye ayrılmaktadır. Fiziksel; parmak izi tanıma ve yüz tanıma gibi çalışmalar olup, davranışsal tabanlı yöntemler ise kişinin davranışsal özelliklerini içeren yapılar olmaktadır. Davranışsal tabanlı yöntemler biyometrikler tabanlı yöntemlerdeki gibi ekstra cihaz ihtiyacı olmadığından daha avantajlı yöntemlerdir. Bu çalışmada literatürde yer alan, son zamanlarda popülerliği artmış olan, dokunma dinamiği tabanlı çalışmalar üzerine detaylı bir inceleme yapılmış olup mevcut bazı çalışmaların performansları üzerine kıyaslamalar yapılmıştır.Recent technological developments in mobile devices have led to an explosive development. Today, however, the number of phone users has reached billions. This situation led to an increase in the crime of mobile devices. In particular, with the use of smart phones, bank account management, e-commerce transactions etc. have increased more and more over these devices. So this has made mobile devices more attractive for snides. As a result, the need for mechanisms with high reliability for the protection of data contained in smartphones has increased. There are 3 most commonly used methods for authentication on mobile devices. The first is the password query. In general, these security checks are considered as confidential information-based. Secondly, token-based methods can be said. Finally, biometrics-based approaches are being used today. Biometric based methods are divided into physical and behavioral forms. Physical form; fingerprint recognition and face recognition, and behavioral based methods are the structures that include the behavioral characteristics of the person. Behavioral- based methods are more advantageous when there is no need for extra devices such as biometric based methods. In this study, a detailed study has been done on the touch dynamics based studies which has recently increased in popularity in the literature.

International Congress on 3D Printing (Additive Manufacturing) Technologies and Digital Industry
3D-PTC2019

Ahmet ULU Ercüment Öztürk