Yayın tarihi için Mühendislik ve Doğa Bilimleri Fakültesi listeleme
Toplam kayıt 878, listelenen: 21-40
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“Kırpma Eşikleri”nin aksiyon potansiyeli sıklığına bağımlılığı
(IEEE, 2015)Hücre dışı sinirsel etkinlik kayıtlarında bulunan ve tekil sinir hücreleri tarafından ateşlenen aksiyon potansiyellerinin belirlenmesi için çoğu zaman bir gerilim eşiği kullanılmaktadır. Eşik, genellikle tüm etkinlik ... -
On directional modulation: An analysis of transmission scheme with multiple directions
(Institute of Electrical and Electronics Engineers, 2015)Increasing the spectral efficiency was always the motivation behind the evolution of wireless communication systems. Also, due to the widespread usage of wireless systems, securing the transmitted data rises as a main ... -
Design of high-frequency broadband CMUT arrays
(Institute of Electrical and Electronics Engineers, 2015)In this work we demonstrate a high-frequency (29-MHz) broadband (100% FBW) CMUT 1D array. The devices are fabricated using anodic bonding with only three photolithography steps. We also discuss the design guidelines for ... -
Fabrication of capacitive micromachined ultrasonic transducers with through-glass-via interconnects
(Institute of Electrical and Electronics Engineers, 2015)This paper introduces a novel fabrication method for capacitive micromachined ultrasonic transducer (CMUT) arrays amenable to 3D integration. The work demonstrates that MEMS structures can be directly built on a through-glass-via ... -
IEEE 802.22 ve 802.11 af sistemlerinin birlikte varolabilmeleri için meşgul tonu gerçeklemesi
(Institute of Electrical and Electronics Engineers, 2015)Bu bildiride, IEEE 802.22 ve IEEE 802.lIaf sistemlerinin TV beyaz boşlugunda birlikte varolabilmeleri için meşgul ton tabanlı yeni bir algoritma önerilmiştir. Önceki meşgul ton tabanlı çalışmalardan farklı olarak 802.11af ... -
Optimization of aerial base station location in LAP for disaster situations
(Institute of Electrical and Electronics Engineers, 2015)Aerial telecommunication platforms will be a part of the future communication networks. In this paper, we address the issue of optimizing the location of Aerial Base Stations (ABS) in Low Altitude Platforms (LAP) to minimize ... -
Enhanced physical layer security by OFDM signal transmission in fractional Fourier domains
(Institute of Electrical and Electronics Engineers, 2015)The main idea of physical layer security for wireless communications is making the transmitted signal as meaningless for eavesdroppers. It can be achieved by signal processing techniques. In this study, fractional Fourier ... -
Physical layer security for wireless implantable medical devices
(Institute of Electrical and Electronics Engineers, 2015)Wireless communications are increasingly important in health-care applications, particularly in those that use implantable medical devices (IMDs). Such systems have many advantages in providing remote healthcare in terms ... -
Short paper: Secure multi-user transmission using CoMP directional modulation
(Institute of Electrical and Electronics Engineers, 2015)Directional Modulation is a recently developed multi-antenna technique for secure transmission. It allows to transmit signals in desired directions while distorting the signal in the other directions. To secure the ... -
Short paper: Experimental characterization of in vivo wireless communication channels
(Institute of Electrical and Electronics Engineers, 2015)In vivo wireless medical devices have a critical role in healthcare technologies due to their continuous health monitoring and noninvasive surgery capabilities. In order to fully exploit the potential of such devices, it ... -
Servikal omurga sonlu eleman modellemesinde, model geometrisinin biyomekanik parametrelere olan etkisi
(Institute of Electrical and Electronics Engineers, 2015)İnterspinus implantları, omurga stenosis ve faset artiritis gibi omurga patolojileri için kullanıldığı bilinir. Tasarımındaki ana düşünce spinos proseslere kuvvet uygulayarak birbirinden uzaklaştırmak ve klinisyenlerin ... -
N-continuous OFDM with CP alignment
(Institute of Electrical and Electronics Engineers, 2015)In this paper, we propose an out-of-band (OOB) reduction method which incorporates with multipath channel and N-continuous OFDM structure. By exploiting the inevitable guard periods between OFDM symbols, i.e., cyclic prefix ... -
Analysis of extended busy tone performance for coexistence between WRAN and WLAN TVWS networks
(Institute of Electrical and Electronics Engineers, 2015)TV White Spaces indicate spectrum bands, which were reserved for licensed terrestrial TV broadcasting and opened to unlicensed use under regulatory conditions. One important regulation which is common in all regulatory ... -
Achieving secure communication through pilot manipulation
(Institute of Electrical and Electronics Engineers, 2015)Raising concerns about the security of wireless communication led researchers develop new concepts to keep information secret from eavesdroppers. Among them, physical layer security relies on the features of the wireless ... -
Suppressing alignment: An approach for out-of-band interference reduction in OFDM systems
(Institute of Electrical and Electronics Engineers, 2015)In this work, we introduce a novel approach, called suppressing alignment, to reduce the out-of-band (OOB) interference of orthogonal frequency division multiplexing (OFDM) systems. Suppressing alignment exploits the ... -
A survey: Spoofing attacks in physical layer security
(IEEE Computer Society, 2015)Increasing demand on wireless communications also increases the issues related to communication security. Among different security solutions, physical layer security have recently been gaining many interests by the ... -
Air-Ground Doppler-delay spread spectrum for dense scattering environments
(Institute of Electrical and Electronics Engineers, 2015)Applications using Air-Ground communications are expected to grow in the future. Low altitude phases of these wireless links are considered sever channels, as they experience huge delay and Doppler spreads, however, they ... -
Nucleotide sequence alignment and compression via shortest unique substring
(Springer Verlag, 2015)Aligning short reads produced by high throughput sequencing equipments onto a reference genome is the fundamental step of sequence analysis. Since the sequencing machinery generates massive volumes of data, it is becoming ... -
Range selection queries in data aware space and time
(Institute of Electrical and Electronics Engineers, 2015)On a given vector X = (x<inf>1</inf>, x<inf>2</inf>, , x<inf>n</inf>) of integers, the range selection (i, j, k) query is finding the k-th smallest integer in (x<inf>i</inf>, x<inf>i+1</inf>, , x<inf>j</inf>) for any (i, ... -
An OFDM signal identification method for wireless communications systems
(Institute of Electrical and Electronics Engineers, 2015)Distinction of orthogonal frequency-division multiplexing (OFDM) signals from single-carrier signals is highly important for adaptive receiver algorithms and signal identification applications. OFDM signals exhibit Gaussian ...