Browsing by Author "2"
Now showing items 261-280 of 398
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A new control plane for 5G network architecture with a case study on unified handoff, mobility, and routing management
Yazıcı, Volkan; Kozat, U.; Sunay, Mehmet Oğuz (IEEE, 2014-11)The tremendous growth in wireless Internet use is showing no signs of slowing down. Existing cellular networks are starting to be insufficient in meeting this demand, in part due to their inflexible and expensive equipment ... -
A new estimation technique of sovereign default risk
Soytaş, Mehmet Ali; Volkan, Engin (Elsevier, 2016-12-27)Using the fixed-point theorem, sovereign default models are solved by numerical value function iteration and calibration methods, which due to their computational constraints, greatly limits the models' quantitative ... -
A new journey: the learning portfolio
A learning portfolio (LP) can be broadly defined as a purposeful collection of student work that exhibits the students’ efforts, progress and achievements (Smith, 1997). At the Preparatory Program of Ozyegin University ... -
A new model for predicting the required pressure difference for pressure swirl atomizers
Nural, Ozan Ekin; Ertunç, Özgür; Hacıbekir, T.; Savcı, İ. H. (Europe, Institute for Liquid Atomization and Spray Systems, ILASS, 2020)Prior to this study an investigation is made to analyze the accuracies of the semi-empirical correlations of the previous studies by comparing them with a large number of experimental data which is extracted from the works ... -
Non-line-of-sight ultraviolet communications over atmospheric turbulence channels
Ardakani, Maryam Haghighi; Heidarpour, Ali Reza; Uysal, Murat (IEEE, 2015)Ultraviolet (UV) communication enables non-line-of sight (NLOS) outdoor wireless connectivity and is particularly desirable to relax or eliminate pointing and tracking requirements of infrared links. In the current literature, ... -
Not all mistakes are equal
Şensoy, M.; Saleki, Maryam; Julier, S.; Aydoğan, Reyhan; Reid, J. (The ACM Digital Library, 2020)In many tasks, classifiers play a fundamental role in the way an agent behaves. Most rational agents collect sensor data from the environment, classify it, and act based on that classification. Recently, deep neural networks ... -
Novel adaptive transmission algorithms for free-space optical links
Karimi, Mehdi; Uysal, Murat (IEEE, 2012-12)Atmospheric turbulence is a major degrading factor in free-space optical (FSO) systems. Since turbulence-induced fading results in a very slowly-varying channel, reliable feedback is possible allowing the implementation ... -
Novel channel models for visible light communications
Miramirkhani, Farshad; Uysal, Murat; Panayırcı, E. (SPIE, 2015-02-07)In this paper, we investigate channel modeling for visible light communications (VLC) using non-sequential ray tracing simulation tools. We create three dimensional realistic simulation environments to depict indoor scenarios ... -
A novel runtime verification solution for LoT systems
İnçki, Koray; Arı, İsmail (IEEE, 2018)Internet of Things (IoT) systems promise a seamless connected world with machines integrating their services without human intervention. It's highly probable that the entities participating in such autonomous machine to ... -
Numerical and experimental analysis of a heat-pipe-embedded printed circuit board for solid state lighting applications
Salem, Thamer Khalif; Khosroshahi, F. S.; Arık, Mehmet; Hamdan, M. O.; Budakli, M. (Taylor & Francis, 2019-01-02)Thermal management is one of the main issues for electronics cooling especially for tightly packaged PCBs that experience local heat generation. Thus, theoretical and experimental investigations have been conducted to ... -
Numerical assessment of the factors controlling the acoustic response of wind turbine blades
Al-Maharma, Ahmad Yousef Mohammad; Şendur, Polat (Canadian Acoustical Association, 2019)The blades of wind turbine are the most critical parts of the wind turbine system, which contribute to noise generated by wind turbine due to excitation from air streams across them. In this numerical study, the effect of ... -
Numerical investigation of multiphase flow inside a pressure swirl atomizer at the initial stage of injection
Razeghi, Alireza; Ertunç, Özgür (Begell House Inc., 2018)Pulse-mode operating atomizers are widely used in industry. This paper presents the fluid flow details and characteristics inside a pulse-mode operating pressure swirl atomizer (PSA). Transient flow simulations are performed ... -
Numerical investigation of the flame location of turbulent premixed combustion in a diffuser burner exposed to various turbulence intensities and turbulence length scales
Nazzal, Ibrahim Thamer; Ertunç, Özgür (Turkish Society of Thermal Science and Technology (TIBTD), 2018)This study aims to investigate the response of the flame location of a turbulent premixed flame that has been exposed to various turbulence intensities and turbulence length scales. A diffuser-type burner is used to reveal ... -
A numerical study of a single unsteady laminar slot jet in a confined structure
Ghaffari, Omidreza; Doğruöz, M. B.; Arık, Mehmet (ASME, 2013)With the inherit advantages of air cooling, jet impingement can produce a factor of two or higher heat transfer than conventional fan flow over bodies. Therefore, impinging jets can solve a number of electronics thermal ... -
Observing interoperability of IoT systems through model-based testing
İnçki, Koray; Arı, İsmail (Springer Nature, 2018)Internet of Things (IoT) has drastically modified the industrial services provided through autonomous machine-to-machine interactions. Such systems comprise of devices manufactured by various suppliers. Verification is a ... -
OCR-aided person annotation and label propagation for speaker modeling in TV shows
Budnik, M.; Besacier, L.; Khodabakhsh, Ali; Demiroğlu, Cenk (IEEE, 2016)In this paper, we present an approach for minimizing human effort in manual speaker annotation. Label propagation is used at each iteration of an active learning cycle. More precisely, a selection strategy for choosing the ... -
On characterizing sectoral interactions via connections between employees in professional online social networks
Ayvaz, Demet; Gürsun, Gonca; Özlale, Ümit (Elsevier, 2018-12)The collaboration among individuals is essential to maximize economic efficiency. Today most of the technological and economical advancements require multidisciplinary efforts. Therefore promoting interaction and knowledge ... -
On context-aware DDoS attacks using deep generative networks
Gürsun, Gonca; Şensoy, Murat; Kandemir, Melih (IEEE, 2018-10)Distributed Denial of Service (DDoS) attacks continue to be one of the most severe threats in the Internet. The intrinsic challenge in preventing DDoS attacks is to distinguish them from legitimate flash crowds since two ... -
On occupant behavior and innovation studies towards high performance buildings: a transdisciplinary approach
Keskin, Cem; Mengüç, Mustafa Pınar (MDPI, 2018-10-06)With ever-increasing population and urbanization, it is crucial to decrease energy density in the built environment without sacrificing occupants’ comfort and well-being. This requires consideration of technological ... -
On sensor fusion for head tracking in augmented reality applications
Ercan, Ali Özer; Erdem, Tanju (IEEE, 2011)The paper presents a simple setup consisting of a camera and an accelerometer located on a head mounted display, and investigates the performance of head tracking for augmented reality applications using this setup. The ...
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