Browsing by Author "2"
Now showing items 241-260 of 398
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Low-loss optical switch using Brewster angle
Kaykısız, Mustafa; Bulgan, Erdal (IEEE, 2011)Fabrication and actuation errors of submicron silicon waveguide optical switches are reported to remain within sub-100 nm ranges. These errors cause high loss ruining the optical performance of the switches at the on-state. ... -
MAC layer performance of multi-hop vehicular VLC networks with CSMA/CA
Eldeeb, Hossıen Badr; Adam, Evşen Yanmaz; Uysal, Murat (IEEE, 2020)Majority of works in the field of vehicular visible light communication (VLC) networks are based on some ideal assumptions. Particularly, the ideal Lambertian pattern is assumed for channel modeling and only a simple ... -
Managing platelet supply through improved routing of blood collection vehicles
Özener, Okan Örsan; Ekici, Ali (Elsevier, 2018-10)In this paper, we study the routing of blood collection vehicles for improving the platelet supply in the blood supply chain. In order to extract platelets, donated blood has to be processed at a central processing facility ... -
Markov-based performance analysis of medium access in visible light communications
Shams, Parvaneh; Narmanlıoğlu, Ömer; Erol-Kantarcı, M.; Uysal, Murat (IEEE, 2015)Visible light communication (VLC) uses the illumination infrastructure to provide high speed wireless connectivity. VLC has recently emerged as a promising alternative/complementary technology to conventional radio-frequency ... -
A Markovian approach for time series prediction for quality control
Şahin, Ahmet; Sayımlar, Ayşe Dilara; Teksan, Zehra Melis; Albey, Erinç (Elsevier, 2019)In this work we aim to predict quality levels of incoming batches of a selected product type to a white goods manufacturer from a third party supplier. We apply a Markov Model that captures the quality level of the incoming ... -
A mathematical model for customer lifetime value based offer management
Şahin, Ahmet; Can, Zehra; Albey, Erinç (Springer, 2018)Customers with prepaid lines possess higher attrition risk compared to postpaid customers, since prepaid customers do not sign long-term obligatory contracts and may churn anytime. For this reason, mobile operators have ... -
Metal oxide thin film characterization for new generation chemical mechanical planarization development
Başım, Gül Bahar; Karagoz, Ayşe (The Electrochemical Society, 2016)This study targets to create a basis for the process development in the new generation semiconductor industry dealing with atomic scale devices. We focus on the CMP process development as it is used for the current and ... -
Metaspace, mobility and resistance: Understanding vendors’ movement pattern as a resistive strategy in Kano, Nigeria
Balarabe, Muhammad Kabir; Şahin, Murat (Sage, 2020-11)The street vendor's (SV) potential mobility in subverting authorities' hegemony over public space has been theorised within the contexts of urban informality and resistance. Discussions mainly revolve around movement tactics ... -
Minimal sign representation of boolean functions: algorithms and exact results for low dimensions
Sezener, Can Eren; Öztop, Erhan (MIT Press, 2015-08)Boolean functions (BFs) are central in many fields of engineering and mathematics, such as cryptography, circuit design, and combinatorics. Moreover, they provide a simple framework for studying neural computation mechanisms ... -
Mixture-kernel based post-distortion in RKHS for time-varying VLC channels
Mitra, R.; Miramirkhani, Farshad; Bhatia, V.; Uysal, Murat (IEEE, 2019-02)Visible light communication (VLC) based systems are a viable green supplement to existing radio frequency based communication systems. However, it has been found that the performance of VLC based systems is impaired in ... -
Molecular simulations of COFs, IRMOFs and ZIFs for adsorption-based separation of carbon tetrachloride from air
Gülçay, Ezgi; Fındıkçı, İlknur Eruçar (Elsevier, 2019-01)Covalent organic frameworks (COFs), metal organic frameworks (MOFs) and zeolitic imidazolate frameworks (ZIFs) have been widely studied gas separation applications due to their large surface areas, high pore volumes, tunable ... -
A multi-channel real time implementation of dual tree complex wavelet Transform in field programmable gate arrays
Canbay, F.; Levent, Vecdi Emre; Serbes, G.; Uğurdağ, Hasan Fatih (Springer International Publishing, 2016)In medical applications, biomedical acquisition systems (BASs) are frequently used in order to diagnose and monitor critical conditions such as stroke, epilepsy, Alzheimer disease, arrhythmias and etc. Biomedical signals ... -
Multi-hop quantum key distribution with passive relays over underwater turbulence channels
Raouf, Amir Hossein Fahim; Safari, M.; Uysal, Murat (IEEE, 2020)Absorption, scattering, and turbulence experienced in underwater channels severely limit the range of quantum communications. In this paper, to overcome range limitations, we investigate a multi-hop underwater quantum key ... -
Multi-hop quantum key distribution with passive relays over underwater turbulence channels
Raouf, Amir Hossein Fahim; Safari, M.; Uysal, Murat (The Optical Society, 2020-12-01)Absorption, scattering, and turbulence experienced in underwater channels severely limit the range of quantum communication links. In this paper, as a potential solution to overcome range limitations, we investigate a ... -
Multi-lingual depression-level assessment from conversational speech using acoustic and text features
Özkanca, Yasin Serdar; Demiroğlu, Cenk; Besirli, A.; Çelik, S. (International Speech Communication Association, 2018)Depression is a common mental health problem around the world with a large burden on economies, well-being, hence productivity, of individuals. Its early diagnosis and treatment are critical to reduce the costs and even ... -
Multivariate sensor data analysis for oil refineries and multi-mode identification of system behavior in real-time
Khodabakhsh, Athar; Arı, İsmail; Bakır, M.; Ercan, Ali Özer (IEEE, 2018)Large-scale oil refineries are equipped with mission-critical heavy machinery (boilers, engines, turbines, and so on) and are continuously monitored by thousands of sensors for process efficiency, environmental safety, and ... -
Nano-boron as an antibacterial agent for functionalized textiles
Akbar, Wazir; Karagöz, Ayşe; Başım, Gül Bahar; Noor, M.; Syed, T.; Lum, J.; Unluagac, M. (Cambridge University Press, 2015-01)The antibacterial properties of boron-containing compounds are well known although there are limited studies available on the pure boron nanoparticles. In this study boron nano-particles were characterized in terms of their ... -
Natural convection immersion cooling with enhanced optical performance of light-emitting diode systems
Tamdoğan, Enes; Arık, Mehmet (2015-10-15)Electronics driven at high currents may experience local hot spots, which may cause thermal degradation or even catastrophic failures. This common problem occurs at light-emitting diode (LED) chips and it is not easily ... -
Nearest neighbor approach in speaker adaptation for HMM-based speech synthesis
Mohammadi, Amir; Demiroğlu, Cenk (IEEE, 2013)Statistical speech synthesis (SSS) approach has become one of the most popular and successful methods in the speech synthesis field. Smooth speech transitions, without the spurious errors that are observed in unit selection ... -
Needle localization using gabor filtering in 2D ultrasound images
Kaya, Mert; Bebek, Özkan (IEEE, 2014)In the percutaneous needle procedures using ultrasound (US) imaging, the needle should be detected precisely to avoid damage to the tissue and to get the samples from the appropriate site. Excessive artifacts and low ...
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