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UYSAL, Murat

Last name
Uysal
First name
Murat
Country
-
  • Okulomotor Sinire Bası Yapan Hipofiz Adenomunun Anatomik Olarak İncelenmesi

    Oculomotor nerve palsy may occur as a result of benign or malignant pathologies such as trauma, aneurysm and tumor. Ptosis, mydriasis and diplopia may be seen depending on the affected nerve fibers and nucleus. While visual field defects such as bitemporal hemianopsia usually were seen in the initial stages of the pituitary adenoma which may be important causes of the oculomotor nerve palsy, generally third cranial nerve palsy symptoms were seen in advanced stages. In this case report, the oc...

    Outage analysis of Hybrid-ARQ protocols in coherent free-space optical communications

    Due to copyright restrictions, the access to the full text of this article is only available via subscription. In this paper, we investigate the performance of automatic retransmission request (ARQ) protocols in coherent free-space optical (FSO) communications. Specifically, we study the outage performance of three different Hybrid-ARQ (H-ARQ) protocols and characterize their performance at large values of signal-to-noise ratio (SNR) through diversity and coding gains. Our results demonstr...

    Multi-hop coherent free-space optical communications over atmospheric turbulence channels

    Due to copyright restrictions, the access to the full text of this article is only available via subscription. In this paper, we investigate multi-hop relaying as an efficient fading mitigation tool for coherent free-space optical (FSO) systems over atmospheric turbulence channels. We consider an FSO relaying system with decode-and-forward relay nodes and multiple heterodyne receivers with modal compensation. Based on a recently introduced statistical characterization for the combined effe...

    Ispitivanje odnosa između temperatura na površini zemlje i biofizičkih pokazatelja dobivenih zemljinim satelitom Landsat TM u Afyonkarahisaru (Turska)

    U radu se istražuje stvaranje topline na površini zemlje u Afyonkarahisaru zasnovano na odnosu između LST i biofizičkih parametara površine (NDVI, NDBI i NDWI) na području Afyonkarahisaru za 1987. i 2011. Za dobivanje NDVI, NDBI i NDWI i temperature površine korištene su satelitske slike Landsata 5 TM. Dok je proračunata srednja temperature površine u 1987. iznosila 27,75 °C u gradu i 27,04 °C u urbanom području, srednja temperature površine u 2011. je 25,98 °C u gradu i 24,81 °C u urbanom po...

    Information theoretic analysis of hybrid-ARQ protocols in coherent free-space optical systems

    Due to copyright restrictions, the access to the full text of this article is only available via subscription. Automatic retransmission request (ARQ) is a feedback-based data link layer technique which enhances the reliability of communication in fading channels. In this paper, we investigate the performance of hybrid-ARQ (H-ARQ) techniques in coherent free-space optical (FSO) communication systems over atmospheric turbulence-induced fading channels. Under the assumption of a Gamma-Gamma s...

    Simulacija razvoja grada primjenom SLEUTH modela u Afyonkarahisar (Turska)

    U ovoj se analizi procjenjuje promjena u razvoju područja oko grada Afyonkarahisar u budućnosti, primjenom SLEUTH modela. Osnovni je cilj prikazati simulaciju promjene razvoja grada do 2030 pomoću SLEUTH modela. U tu su svrhu razvijena dva različita modela razvoja. Kao rezultat analize ustanovljeno je da će uz postojeći scenarij razvoja, od 2011 do 2030 grad porasti za 3115 hektara, a to će rezultirati uništenjem 2300 hektara pašnjaka. Ustanovljeno je da se 2000 ha prirodnih bogatstava može z...

    Hava LiDAR Nokta BulutununSayısal Yükseklik Modeli Doğruluğuna Etkisi

     Veri işleme teknolojilerindeki gelişmelere paralel olarak harita, inşaat, maden, ziraat, mimari ve planlama gibi birçok mühendislik alanında yaygın olarak kullanılmaya başlanan Sayısal Yükseklik Modeli (SYM) nin oluşturulmasında yoğun ve doğru yükseklik verisi temini konusu önem kazanmaktadır. GPS (Global Positioning System), IMU (Inertial Measurement Unit) ve lazer tarama teknolojilerinin entegrasyonu ile oluşturulmuş üç boyutlu veri toplama yöntemi olan LiDAR (Light Detection and Ranging) ...

    Outage Performance and Diversity Gain Analysis of Free-Space Optical Multi-hop Parallel Relaying

    Due to copyright restrictions, the access to the full text of this article is only available via subscription. In this paper, we investigate the outage performance of free-space optical mesh networks, which build upon the combination of serial (multi-hop) and parallel relaying. We assume log-normal atmospheric turbulence channels and derive outage probability expressions for the multi-hop parallel relaying scheme under consideration. Our outage probability analysis demonstrates substantial...

    Survey on free space optical communication: a communication theory perspective

    Due to copyright restrictions, the access to the full text of this article is only available via subscription. Optical wireless communication (OWC) refers to transmission in unguided propagation media through the use of optical carriers, i.e., visible, infrared (IR), and ultraviolet (UV) bands. In this survey, we focus on outdoor terrestrial OWC links which operate in near IR band. These are widely referred to as free space optical (FSO) communication in the literature. FSO systems are use...

    Novel adaptive transmission algorithms for free-space optical links

    Due to copyright restrictions, the access to the full text of this article is only available via subscription. 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 of adaptive transmission in practical FSO systems. In this paper, we propose adaptive transmission algorithms in which transmit power and/or modulation size are va...
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