Browsing Faculty of Engineering by Author "3"
Now showing items 41-60 of 92
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Game of protocols: Is QUIC ready for prime time streaming?
Arısu, Şevket; Yıldız, Ertan; Beğen, Ali Cengiz (Wiley, 2020-05)Quick User Datagram Protocol (UDP) Internet Connections (QUIC) is an experimental and low-latency transport protocol proposed by Google, which is still being improved and specified in the Internet Engineering Task Force ... -
Gauss karışım modeli tabanlı konuşmacı doğrulama sistemlerinde kişiye ve kanala uyarlanmada klasik MAP tabanlı yöntemlerin performans analizi
Koşunda, Serol; Yeşil, Fatih; Ayazoğlu, Yaprak; Demiroğlu, Cenk (IEEE, 2011)In this paper, performance of Gaussian mixture models (GMM) based algorithms implemented in Speech Processing Laboratory at Ozyegin University, within NIST SRE2004 and 2006 database was reported. Gaussian mixture models ... -
Girişim bulunan IEEE 802.11ac aǧlarda TCP sıkışıklık denetim algoritmalarinin başarımları
Çakmak, Kıvanç; Sunay, Mehmet Oğuz; Ercan, Ali Özer; Karaca, M. (IEEE, 2016)In order to meet the incremental requirements from clients, fifth generation Wireless Local Area Network(WLAN) protocol IEEE 802.11ac provides a lot more throughput than his predecessors. However, in all distributed channel ... -
Handover in VLC networks with coordinated multipoint transmission
Demir, Muhammet Selim; Miramirkhani, Farshad; Uysal, Murat (IEEE, 2018-01-31)In this work, we consider a cellular visible light communication (VLC) network where each ceiling luminary serves as an access point (AP). The network is assumed to support coordinated multipoint transmission (CoMP). The ... -
Humanitarian relief supplies distribution: an application of inventory routing problem
Çankaya, Emre; Ekici, Ali; Özener, Okan Örsan (Springer, 2019-12)In this paper, we study the distribution of humanitarian relief supplies. In humanitarian relief, supplies including food, water and medication are received in batches/waves from the suppliers and the donors. Then, these ... -
IEEE 802.11ac aǧların çok kullanıcılı ÇGÇÇ özelliǧi üzerine incelemeler
Çakmak, Kıvanç; Sunay, Mehmet Oğuz; Ercan, Ali Özer (IEEE, 2016)This paper studies the multi-user MIMO feature of IEEE 802.11ac networks that serve, along with IEEE 802.11ac nodes, also legacy IEEE 802.11n nodes. For this purpose, we develop a simulator that models the IEEE 802.11ac ... -
IEEE 802.15.7r1 reference channel models for visible light communications
Uysal, Murat; Miramirkhani, Farshad; Narmanlioglu, Ömer; Baykas, T.; Panayirci, E. (IEEE, 2017)The IEEE has established the standardization group 802.15.7r1 “Short Range Optical Wireless Communications”, which is currently in the process of developing a standard for visible light communication (VLC). As with any ... -
Impact of orifice location on the mechanical response of side and central orifice synthetic jets
Naseem, Mohammad Zohaib; Şendur, Polat; Arık, Mehmet (2018-07-24)Synthetic jets have been at the focus of a number applications including flow control and thermal management of microelectronics due to their unique characteristics of transferring linear momentum through a flow structure ... -
Impact of orifice size over mechanical, flow and thermal performances of synthetic jets
Işıl, Onuralp; Yücesan, Boğaç; Arık, Mehmet (IEEE, 2018-07-24)Recent electronic systems require more aggressive cooling solutions due to their high functionality, densely packaged components and localized heating compared to low functionality systems in the last decade. Synthetic ... -
An investigation into flow and heat transfer of an ultrasonic micro-blower device for electronics cooling applications
Ghaffari, Omidreza; Solovitz, S. A.; Ikhlaq, Muhammad; Arık, Mehmet (Elsevier, 2016-05-08)As compact electronics increase in functionality, new electronics cooling approaches must be more effective, and they must be lower in form factor. In this paper, we investigated the cooling performance of a miniature ... -
Investigation of corrosion behavior of carbon steel for petroleum pipeline applications under turbulent flow conditions
Ahmed, Mohammed Salih; Talib, Nayyef Ahmed; Al-Gebory, Layth Wadhah Ismael (Institute of Information Science, 2020)This study investigates the corrosion of steel samples immersed in water with a dynamic corrosion setup at different pH values for three different velocities and three different exposure time. The characteristics of material ... -
Kombi̇natoryal test tekni̇kleri̇ni̇n karmaşık olay i̇şleme motorlarında uygulanması
Arı, İsmail; Ölmezoğulları, Erdi; Sözer, Hasan (IEEE, 2012)Testing practice has a critical place during the design, implementation and integration of software, hardware and complex systems composed of these. Cost of failures caused by bugs that could not be detected and fixed early ... -
Low-cost thin-film passive RFID circuits and detector system
El-Sawy, Salma; Nawaz, Wasim; Abouzeid, Mohamed Osama Hussein Soliman; Tekin, Ahmet (Cambridge University Press, 2020-06)This paper discusses the design of chip-less RFID tags of a standard pocket size of 69 mm by 156 mm. These tags are based on lumped elements of copper metal traces constructed on a thin polyamide flexible substrate. Moreover, ... -
Mars gezgini prototipi Merih-2
Balcı, Barış; Yıldırım, Mehmet Can; Bebek, Özkan (Gazi Üniversitesi, 2018-12)Merih-2, Özyeğin Üniversitesi Rover Takımı tarafından University Rover Challenge 2016 ve European Rover Challenge 2016’ya katılmak ve Mars koşullarında görev yapmak için tasarlanan gezgindir. Sürüş için Merih-2’nin 6 adet ... -
MedSpecSearch: Medical specialty search
Şahin, Mehmet Uluç; Balatkan, Eren; Eran, Cihan; Zeydan, E.; Yeniterzi, Reyyan (Springer Nature, 2019)MedSpecSearch (www.medspecsearch.com) is a search engine for helping users to find the relevant medical specialty for a doctor visit based on users’ description of symptoms. This system is useful for users who are not sure ... -
Metal oxide nano film characterization for CMP optimization
Başım, Gül Bahar; Karagöz, Ayşe; Özdemir, Zeynep (ECS, 2013)This paper focuses on the planarization of metallic films in microelectronics manufacturing by CMP through investigation of metal oxide thin films forming as a result of the chemical component of the process. Tungsten ... -
Microstrip patch antenna design with unified cornered rectangles
Devli, Ata; Celik, Mert; Demir, Berkay; İmeci, T.; Saral, A. (IEEE, 2016)In this design, high-gain, directional microstrip patch antenna works at 11.1 GHz, which is in Ku-Band satellite receive frequency band. Our design has 3 nested rectangular patches which are cornered. As a result, the input ... -
A mobile channel model for vlc and application to adaptive system design
Miramirkhani, Farshad; Narmanlıoğlu, Ömer; Uysal, Murat; Panayirci, E. (IEEE, 2017-05)In this letter, we propose a realistic channel model for visible light communication (VLC) assuming a mobile user. Based on non-sequential ray tracing, we first obtain channel impulse responses for each point over the user ... -
Modal characterization of additively manufactured TPMS structures: comparison between different modeling methods
Şimşek, Uğur; Akbulut, Aykan; Gayir, C. E.; Başaran, Cansu; Şendur, Polat (Springer Nature, 2020-10-14)The use of lattice structures has received increasing interest in various engineering applications owing to their high strength to weight ratio. Advances in additive manufacturing technologies enabled the manufacturing of ... -
A multi-sensor integrated head-mounted display setup for augmented reality applications
Kermen, Ahmet; Aydın, T.; Ercan, Ali Özer; Erdem, Tanju (IEEE, 2015)We present an HMD based AR system comprising visual and inertial sensors. The visual sensor is a camera pair and the inertial sensors consist of an accelerometer and a gyroscope. We discuss the temporal and spatial calibration ...
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