Understanding the reasons of pedophilia

In today’s world, everything is more complex than it used to be. In modern society, we have more complex problems than previous societies. Pedophilia is one of the most recent concepts of psychology even though its history goes back as old as human history. Pedophilia is a universal phenomenon that is observed in all cultures and social classes. Definitely, it has a detrimental effect on children mental health and well-being. It requires further attention. Therefore, the purpose of this review is to provide an in-depth understanding of this problem; such as definitions, prevalence and possible causes, and risk factors of phenomenon

Decentralized Online Federated G-Network Learning for Lightweight Intrusion Detection

Cyberattacks are increasingly threatening networked systems, often with the emergence of new types of unknown (zero-day) attacks and the rise of vulnerable devices. While Machine Learning (ML)-based Intrusion Detection Systems (IDSs) have been shown to be extremely promising in detecting these attacks, the need to learn large amounts of labelled data often limits the applicability of ML-based IDSs to cybersystems that only have access to private local data. To address this issue, this paper proposes a novel Decentralized and Online Federated Learning Intrusion Detection (DOF-ID) architecture. DOF-ID is a collaborative learning system that allows each IDS used for a cybersystem to learn from experience gained in other cybersystems in addition to its own local data without violating the data privacy of other systems. As the performance evaluation results using public Kitsune and Bot-IoT datasets show, DOF-ID significantly improves the intrusion detection performance in all collaborating nodes simultaneously with acceptable computation time for online learning

Android platformunda zararlı yazılım analizi için hibrit kum havuzu geliştirilmesi

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.Mobil telefon endüstrisi son yılların en hızlı geliĢen endüstrilerinden biri olmuĢtur. Bu geliĢmeler ıĢığında Android iĢletim sisteminin akıllı telefonlar içerisinde büyük bir payda elde etmesinin bir yan etkisi olarak Android iĢletim sistemi zararlı yazılım geliĢtiricilerinin de ilgini çekmeye baĢlamıĢtır. Artan zararlı Android uygulamalarının gerçekten zararlı olup olmadığına karar vermek için zararlı yazılım analistlerinin tipik olarak baĢvurduğu kum havuzları Android iĢletim sistemi için yetersiz kalmaktadır. Bu bağlamda yapılan akademik çalıĢmalar [1, 2, 3, 4] ve ortaya çıkan prototipler eriĢilebilirlik ve analiz yapabilme kapasitesi olarak yetersiz kalmıĢtır. Bu makalede Android zararlı yazılım analizi için hibrit analiz yapabilecek bir kum havuzu önerilmiĢ ve zararlı yazılımların tespiti için kullanılan kum havuzlarının Android zararlı yazılımlar yönünden incelemesi yapılmıĢtır. ÇalıĢma sonucunda hibrit analiz yeteneklerine sahip bir android kum havuzu geliştirilmiştir.Mobile device industry is one of the fastest growing industry in recent years. In the light of this growth, Android operating system is increasing its user base which also attracts malware developers as well. Increasing android malware is becoming a problem for analysts in order to analyse and decide whether application is malicious or benign. Researches for this problem [1, 2, 3, 4] and prototypes is not enough in terms of accessibility and analysis capabilities. In this paper, hybrid android sandbox for both dynamic analysis and static analysis is proposed while comparing malware sandboxes already used for malware analysis. As a result of this paper, hybrid android sandbox which performs static analysis and dynamic analysis as well as reports analysis results for analysts is designed

High performance HEVC and FVC video compression hardware designs

High Efficiency Video Coding (HEVC) is the current state-of-the-art video compression standard developed by Joint collaborative team on video coding (JCT-VC). HEVC has 50% better compression efficiency than H.264 which is the previous video compression standard. HEVC achieves this video compression efficiency by significantly increasing the computational complexity. Therefore, in this thesis, we proposed a low complexity HEVC sub-pixel motion estimation (SPME) technique for SPME in HEVC encoder. We designed and implemented a high performance HEVC SPME hardware implementing the proposed technique. We also designed and implemented an HEVC fractional interpolation hardware using memory based constant multiplication technique for both HEVC encoder and decoder. Future Video Coding (FVC) is a new international video compression standard which is currently being developed by JCT-VC. FVC offers much better compression efficiency than the state-of-the-art HEVC video compression standard at the expense of much higher computational complexity. In this thesis, we designed and implemented three different high performance FVC 2D transform hardware. The proposed hardware is verified to work correctly on an FPGA board

Hegel’s treatment of modality in the context of contemporary modal metaphysics

This thesis is a study on the nature of modality in Hegel’s Logic and contemporary modal metaphysics. The thesis has two aims: Firstly, it examines Lewisian modal realism, as well as the post-Lewisian modal metaphysical accounts of modal actualism and modal essentialism in order to reveal that each position appeals to a non-modal foundation to make modal concepts explicit. Each position thus falls under what Hegel regards as pre-critical metaphysics by suggesting a modally unaccountable ground for modal concepts. The very idea of a foundation to modality is problematic because (a) as a foundation, it is necessarily assumed without further justification, and (b) it directs our attention away from the nature of modality itself to its supposed foundations. These non-modal foundational take the form of possible worlds for modal realism, the form of properties for modal actualism and the form of essence for modal essentialism. To eschew foundationalism in modal metaphysics and provide a less questionable basis for modality, the thesis suggests Hegel’s treatment of modality as a viable alternative in virtue of its being free from the concerns stemming from the pre-critical way of doing metaphysics. The thesis situates Hegel in contemporary modal metaphysics by undertaking two types of exposition. By examining Hegel's treatment of essence and property, the thesis will show negatively that essence and property cannot be a foundation for modality, while by examining Hegel’s treatment of modality, the thesis positively proves that modal concepts are analysable and explainable within the domain of actuality, a domain that can only be made explicit by modal determinations. These two expositions provide an idea of a self-sustaining and self-explanatory modal metaphysics without appealing to non-modal foundationalist metaphysical commitments. More precisely, I argue that Hegel’s logical derivation of modal concepts constitutes a Hegelian modal metaphysics, which contains a comprehensive account of modal concepts that does not rely on any non-modal primitive

Efficient Removal Approach of Micropollutants in Wastewater Using Membrane Bioreactor

In the recent past years, micropollutants that are pharmaceutically active compounds (PhACs) have been used extensively and have been discovered in raw sewage, wastewater treatment plants, effluents, surface, and groundwater with concentrations from ng/L to several μg/L. Even though many of these compounds are still not determined online, monitoring technology improvements progressed. Today’s wastewater treatment plants are not constructed to remove these micropollutants yet. Conventional activated sludge processes are used in the treatment of municipal wastewater but are not specifically designed for the removal of micropollutants. The remaining pharmaceuticals mix into surface waters. At that stage, they can adversely affect the aquatic environment and may cause issues for drinking water production. As the conventional methods are insufficient for removing the micropollutants, other alternative treatment methods can be applied such as coagulation-flocculation, activated carbon adsorption (powdered activated carbon and granular activated carbon), advanced oxidation processes, membrane processes, and membrane bioreactor. It has been observed that membrane bioreactor (MBR) can achieve higher and more consistent micropollutants removal. The removal of micropollutants is based on physicochemical properties of micropollutants and the conditions of treatment. Due to recent technical innovations and cost reductions of the actual membranes, the membrane bioreactor takes attention. In this study, membrane bioreactor experiments for micropollutants in drinking use, wastewater, and surface waters were investigated in detail based on literature investigations, and the feasibility of this method was evaluated