Güncel Gönderiler: Mühendislik Fakültesi
Toplam kayıt 1048, listelenen: 841-860
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GaN terahertz photodetectors for the reststrahlen Gap of intersubband optoelectronics
(Ieee, 2017)Terahertz intersubband photodetectors are developed based on GaN/AlGaN quantum wells grown on a semi-polar GaN substrate, covering the frequency range that is fundamentally inaccessible to existing III-V semiconductor ... -
Büyük Choi Williams zaman-frekans öznitelik seti kullanarak EKG aritmi tespiti
(Ieee, 2017)Early detection and monitoring of heart diseases increase human quality of life and this can prevent negative consequences. It is even more important because it can prevent sudden deaths. in today's technology, these ... -
Strain-engineered SiGe nanomembrane quantum-well infrared photodetectors
(Ieee, 2017)SiGe quantum-well nanomembranes, where stress from lattice mismatch is relaxed via elastic strain sharing rather than defect formation, are used to develop intersubband photodetectors showing improved performance compared ... -
Theoretical study of thermoelectric properties of p-type Mg-2 Si1-chi Sn-chi solid solutions doped with Ga
(Elsevier Science Sa, 2017)Mg-2 Si-Mg-2 Sn solid solutions are a promising class of thermoelectric materials. the thermoelectric properties of p-type Mg-2(Si-0.3 Sn-0.7)(1-y) Gay solid solutions with the doping levels as y = 0.05 and y = 0.07 are ... -
A preface to the special issue section on "The National Hydrogen Technologies Congress (UHTEK 2015), 20-23 December 2015, Istanbul, Turkey"
(Pergamon-Elsevier Science Ltd, 2017)Hydrogen energy studies are considered to be vital for the future energy scenarios of Turkey. In this regard, in order to investigate and develop the existing potential of hydrogen energy studies in Turkey, National ... -
Thermoelectric properties of Mg2X (X = Si, Ge) based bulk and quantum well systems
(Amer Inst Physics, 2017)Mg2X (X = Si, Ge) compounds are promising thermoelectric materials for middle temperature applications due to good thermoelectric properties, nontoxicity, and abundantly available constituent elements. So far, these materials ... -
Hf2Co11 thin films: Rare-earth-free permanent nanomagnets
(Elsevier Science Sa, 2017)Hf2Co11 thin films were deposited on single crystalline Si(100) substrates by using conventional direct current (DC) magnetron sputtering with a Hf2Co11 alloy target. All films were grown at room temperature with 120W ... -
A flexible PV-powered battery-charging scheme for electric vehicles
(Taylor & Francis Ltd, 2017)This paper presents a new design for a low-impact, fully controlled, and flexible self-adjusting DC side pulse-width modulation (PWM)-hybrid modulated filter compensation (HMFC) scheme for multi photovoltaic-arrays utilized ... -
Thickness-dependent permanent magnet properties of ZrCo thin films grown on Si with Pt underlayer
(Springer, 2017)Zr-Co is one of the essential magnetic materials due to its interesting magnetic and structural properties. in this work, we studied the magnetic and structural properties of ZrCo thin films of different thicknesses grown ... -
Cordierite-bearing strongly peraluminous cebre rhyolite from the eastern Sakarya Zone, NE Turkey: Constraints on the variscan orogeny
(Elsevier, 2017)The Cebre Rhyolite with an outcropping area up to 12 km(2) is one of the rare extrusions in the Variscan basement of the Sakarya Zone. the unit consists of high-K calc alkaline rhyolites (SiO2 = 74-82 wt.%). Abundant ... -
Zircon Lu-Hf isotope systematics and U-Pb geochronology, whole-rock Sr-Nd isotopes and geochemistry of the early Jurassic Gokcedere pluton, Sakarya Zone-NE Turkey: a magmatic response to roll-back of the Paleo-Tethyan oceanic lithosphere
(Springer, 2017)The early Mesozoic was a critical era for the geodynamic evolution of the Sakarya Zone as transition from accretion to collision events in the region. However, its complex evolutionary history is still debated. To address ... -
Geotechnical investigations and remediation design for failure of tunnel portal section: a case study in northern Turkey
(Science Press, 2017)Mass movements are very common problems in the eastern Black Sea region of Turkey due to its climate conditions, geological, and geomorphological characteristics. High slope angle, weathering, dense rainfalls, and anthropogenic ... -
Effects of the equatorial electrojet on FM-based passive radar systems
(Ieee-Inst Electrical Electronics Engineers Inc, 2017)Passive radar systems operate by employing cooperative or noncooperative radio signals in the environment in order to sense remote targets. This particular feature of passive radar systems provides unique opportunities to ... -
Effects of Na doping on CdS thin films and n-CdS/p-Si solar cells via chemical bath deposition method
(Korean Assoc Crystal Growth, Inc, 2017)Un-doped and Na doped CdS thin films were deposited by chemical bath deposition method. the effects of Na doping on structural, optical and electrical properties of CdS thin films and n-CdS/p-Si heterojunction were ... -
Graphene terahertz plasmons: A combined transmission spectroscopy and raman microscopy study
(Amer Chemical Soc, 2017)Graphene provides a promising materials platform for fundamental studies and device applications in plasmonics. Here we investigate the excitation of THz plasmon polaritons in large-area graphene samples on standard oxidized ... -
Geotechnical assessment of a slope stability problem in the Citlakkale residential area (Giresun, NE Turkey)
(Springer Heidelberg, 2017)Because of the rapidly growing population, new settlement areas are required, and finding an appropriate location is always difficult, especially in mountainous areas. in these regions, efficient use of the existing ... -
Exergetic sustainability indicators for a high pressure hydrogen production and storage system
(Pergamon-Elsevier Science Ltd, 2017)This study examines the exergetic sustainability effect of PEM electrolyzes (PEME) integrated high pressure hydrogen gas storage system whose capacity is 3 kg/h. For this purpose, the indicators, previously used in the ... -
The design steps of a hybrid energy system
(Polish Acad Sciences Inst Physics, 2017)In this paper the design stages of a mixed photovoltaic-wind energy system, supplied with solar and wind energy was discussed. First, general information about the employed wind turbines and solar panels is given and their ... -
Investigation of GSM, LTE and Wi-Fi electromagnetic radiation in dwellings
(Polish Acad Sciences Inst Physics, 2017)Electromagnetic radiation exposure increases with the rise of the wireless communication devices. Electromagnetic radiation, especially near 2400 MHz band, has gradually increased with the widespread of wireless fidelity ... -
OFDM performance of ultra wideband in wireless body area network channel
(Polish Acad Sciences Inst Physics, 2017)Data transfer for health monitoring can be highly critical because of life dependency transmitted data. IEEE 802.15.6 is a standard for wireless body area network published in 2012 to satisfy the reliability which is ...
