Başlık için Mühendislik ve Doğa Bilimleri Fakültesi listeleme
Toplam kayıt 1170, listelenen: 1147-1166
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Wave propagations in metamaterial based 2D phononic crystal: Finite element analysis
(Institute of Physics Publishing, 2018)In the present work, the acoustic band structure of a two-dimensional (2D) phononic crystal (PnC) containing composite material were investigated by the finite element method. Two-dimensional PC with triangular and honeycomb ... -
Wear Behavior of Borided AISI D2 Steel under Linear Reciprocating Sliding Conditions
(Pleiades Publishing, 2019)AISI D2 steel is the most commonly used cold-work tool steel in its grade. In this study, microstructural characterization and some mechanical properties of borided AISI D2 steel samples were investigated. The boriding ... -
Webcam Based Real-Time Robust Optical Mark Recognition
(Springer, 2015)This study proposes a robust, low cost, real-time optical mark recognition (OMR) system that uses a webcam and a small OMR form to read hand-marked data from plain paper. The system is designed to read data from any ... -
WEDM machining of MoNbTaTiZr refractory high entropy alloy
(Elsevier, 2022)Refractory high entropy alloys (RHEAs) have shown great promise for a multitude of advanced engineering applications due to their high mechanical stability from cryogenic temperatures to 1600 °C. However, the low ductility ... -
Wet non-thermal integration of nano binary silicon-gold system with strong plasmonic and luminescent characteristics
(Amer Inst Physics, 2019)We report on a wet none thermal integration of the binary silicon-gold nano system. Instead of thermally based gas-solid procedures, we use charge exchange/injection-based procedures in a chemical wet environment. SEM and ... -
Wheat Yield Estimation from NDVI and Regional Climate Models in Latvia
(MDPI, 2020)Wheat yield variability will increase in the future due to the projected increase in extreme weather events and long-term climate change effects. Currently, regional agricultural statistics are used to monitor wheat yield. ... -
Which power cycle is the best fit for parabolic trough solar collectors? A comparative and comprehensive case study for six sub-configurations of the three main cycles
(Elsevier, 2023)In this study, the integration of a Parabolic Trough Collector with different power cycles was investigated on an annual basis in terms of Energy, Exergy, Economics and Environmental under different meteorological conditions. ... -
Why Kalina (Ammonia-Water) cycle rather than steam Rankine cycle and pure ammonia cycle: A comparative and comprehensive case study for a cogeneration system
(Elsevier, 2022)There are many studies on the Kalina cycle and steam Rankine cycles. However, there are not enough comparative and descriptive studies on why the Kalina cycle or steam Rankine cycle should be selected. In addition to that, ... -
Wide band fractal-based perfect energy absorber and power harvester
(Wiley, 2019)In this article, a novel wide band polarization and incident angle independent metamaterial absorber (MA) and energy harvesting applications which operates at C (4GHz-8 GHz) and X (8GHz-12 GHz) is proposed. The unit-cell ... -
A Wideband Highly Efficient Omnidirectional Compact Antenna for WiMAX/Lower 5G Communications
(Wiley, 2023)Microstrip patch antenna (MPA) is widely used for different wireless communications such as WiMAX and fifth generation (5G). In this paper, a wideband, highly efficient, omnidirectional, compact novel patch antenna has ... -
Wideband luminescence from bandgap-matched Mg-based Si core-shell geometry nanocomposite
(American Institute of Physics Inc., 2018)We use wet treatment to integrate red-luminescent Si nanoparticles with Mg-based wide-bandgap insulators Mg(OH) and MgO (5.7 and 7.3 eV respectively). In the process, Mg2+ is reduced on Si nanoparticle clusters, while ... -
Wideband metamaterial absorber based on CRRs with lumped elements for microwave energy harvesting
(Taylor & Francis, 2018)A novel metamaterial absorber structure is designed and characterized for microwave energy harvesting. The suggested structure is composed of two circular ring resonators with different dimensions. Due to harvesting ... -
Wideband Microwave Absorber Comprising Metallic Split-Ring Resonators Surrounded With E-Shaped Fractal Metamaterial
(Institute of Electrical and Electronics Engineers Inc., 2021)A specially designed metallic E-shaped fractal-based perfect metamaterial absorber (PMA) with fairly wideband absorptivity in the K- and Ka-bands of the microwave regime was investigated. The PMA top surface is comprised ... -
Wire electric discharge machining and its effect on the surface finish of HfNbTaTiZr refractory high-entropy alloy
(Springer, 2023)Refractory high-entropy alloys (RHEAs) have high strength and hardness but limited plasticity at room temperature, making them challenging to process and shape using conventional techniques. In the current study, HfNbTaTiZr ... -
Yapay Sinir Ağları ve Adaptif Nörobulanık Sistemler ile 3. İstanbul Havalimanı Talep Tahmini ve Türk Hava Yolları İç Hat Filo Optimizasyonu
(Endüstri Mühendisliği Dergisi, 2019)Bu çalışmanın amacı, İstanbul Atatürk Havalimanı’na ikame olarak inşa edilen 3.İstanbul havalimanının gelecek yıllardaki yolcu, yük talebi ve iç hat filosunu tahminetmek ve planlayabilmektir. İstanbul Atatürk Havalimanının ... -
Yapay sinir ağları yöntemi kullanılarak buharlaşma miktarı tahmini
(2018)Buharlaşma tahmini, özellikle kurak dönemlerde ve kurak alanlarda, sulama yönetiminde ve hidroliktasarımlarda önemli bir rol oynar. Bu çalışmada, Hargreaves-Samani, Ritchie ve Turc denklemleri gibiampirik (geleneksel) ... -
Yapay Zekâ ve İstatistiksel Yöntemler ile Küresel Ticarette Rekabet Ölçütü Olan Lojistik Performans İndeksine (LPI) Etken Parametrelerin Ülke Bazlı İncelenmesi ve Tahmin Modellerinin Geliştirilmesi
(Fırat Üniversitesi, 2020)Firmalar ürettikleri ürünleri pazarlamak için birçok farklı yöntem geliştirmektedir. Ürünün, üreticiden tüketiciye ulaşana kadar sürecin her aşaması rekabet piyasasında incelenmesi gereken önemli birer unsur olmaktadır. ... -
Yaprak Sınıflandırmak için Yeni Bir Evrişimli Sinir Ağı Modeli Geliştirilmesi
(Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi, 2021)Doğanın bir parçası olan bitkiler çevremize güzellik katmanın yanı sıra alternatif tıp gibi farklı sebep için de kullanılmaktadır. Bu gibi uzmanlık gerektiren durumlarda halk arasında yayılan yanlış bilgilerle zehirli ... -
Yeni Bir Yüksek Hızlı Kalp Destek Pompasının Sayısal ve Deneysel Analizi
(2018)Sol ventriküler destek cihazları kalp yetmezliğine sahip hastalarda kullanılmaktadır. Rotodinamikkan pompalarının santrifüj, eksenel ve karışık akışlı olmak üzere üç tipi vardır. Eksenel akışlı kanpompaları yüksek hızlı ... -
Yeşil Mutabakatı Destekleyen Mineral Katkılı Çimento Esaslı Kompozitlerin Asit-Sülfat Direnci ve Karbonatlaşma Derinliği
(Osmaniye Korkut Ata Üniversitesi, 2022)Çalışma kapsamında sürdürülebilir ve yeşil mutabakatı destekleyen çimento esaslı kompozitlerin mekanik ve durabilite performanslarını değerlendirmek için Granüle Yüksek Fırın Cürufu (GYFC), Uçucu Kül (UK) ve Silis Dumanı ...
