Browsing by Author "3"
Now showing items 41-60 of 99
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Exploring mobility & workplace choice in a flexible office through post-occupancy evaluation
Göçer, Özgür; Göçer, Kenan; Karahan, Ebru Ergöz; İlhan, Işıl Oygür (Taylor & Francis, 2018)Developments in information and communication systems, organisational structure and the nature of work have contributed to the restructuring of work environments. In these new types of work environments, employees do not ... -
An extension to the classical mean–variance portfolio optimization model
Ötken, Çelen Naz; Organ, Zeynel Batuhan; Yıldırım, Elif Ceren; Çamlıca, Mustafa; Cantürk, Volkan Selim; Duman, Ekrem; Teksan, Zehra Melis; Kayış, Enis (Taylor & Francis, 2019-07)The purpose of this study is to find a portfolio that maximizes the risk-adjusted returns subject to constraints frequently faced during portfolio management by extending the classical Markowitz mean-variance portfolio ... -
Fatigue characteristics of continuous welded rails and the effect of residual stress on fatigue-ratchetting interaction
Mansouri, Deniz; Şendur, Polat; Yapıcı, Güney Güven (Taylor & Francis, 2020-03-16)The importance of ratchetting-fatigue interaction is garnering interest due to complex failure mechanism of rail welds under cyclic loading. The objective of this paper is to investigate the fatigue characteristics of ... -
Firm boundaries, incentives, and fund performance: Evidence from a private pension fund system
Gölçen, Umut; Özsoy, Satı Mehmet; Yalçın, Atakan (Elsevier, 2020-06)The private pension fund system in Turkey presents a unique institutional structure where bank holding companies can own both private pension companies and asset management firms. More often than not, pension companies ... -
First lattice calculation of charmed hadrons' electromagnetic form factors
Can, K. Utku; Erkol, Güray; Işıldak, Bora; Oka, M.; Takahashi, T. T. (IOP Publishing, 2014)Electromagnetic form factors of D and D* mesons and Ξcc, Σc, Ωc and Ωcc baryons are calculated in 2+1 flavor lattice QCD. As a by product of this calculation electric/magnetic charge radii and magnetic moments are extracted. ... -
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 ... -
Gender in the cockpit: Challenges faced by female airline pilots
Yanıkoğlu, Özge Peksatıcı; Kılıç, Sena; Küçükönal, Hatice (Elsevier, 2020-07)Despite the increasing number of female pilots in recent years, the aviation industry is still considered a male-dominated one. Being underrepresented in an occupation and working in an industry with masculine discourses ... -
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 ...
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