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324 articles for “Channel”
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Research ArticleOpen accessEvery word in the titleComparison of Bit Error Rate Performance of Multi Tone Channel Utilising De-OQPSK and De-Off Set 16 QAM with Guard IntervalIbrahim A.Z. QatawnehDigital communications systems use Multi tone Channel (MC) transmission techniques with differentially encoded and differentially coherent demodulation. Today there are two principle MC application, one is for the high speed digital subscriber loop and the other is for the broadcasting of digital audio and video signals. In this study the comparison of multi carriers with OQPSK and Offset 16 QAM … …Journal of Computer Science, Vol. 1, Issue 3 · 30 Sep 2005 · 6,847 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleFormation of Optimal Messages Path Delivery Within a Virtual Channel TechnologyH. Al-Bdour, K. KaabnehThis research study deals with the process of reduction and optimization of data transmission delays in mobile Internet networks during mobile subscriber transmission (SsS) to various coverage areas. The methods for information transmission in IP-networks and networks based on virtual channel technology are investigated. Throughout this research, special attention is given to the analysis of existing methods for channel reconfiguration … …Journal of Computer Science, Vol. 1, Issue 2 · 30 Jun 2005 · 6,535 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleTransverse Velocity, Transverse Boundary Shear Stress and Flow Deviation in Meandering Open ChannelsYoussef Ismail HafezThis study presents a novel approach for characterizing the mechanics of flow in mildly meandering open channels, specifically focusing on the development of a new vertical distribution equation for transverse velocity. Unlike existing equations in the literature that rely on complex logarithmic or integral forms or infinite series forms, which are impractical for hydraulic engineers, the proposed equation employs ordinary … …American Journal of Environmental Sciences, Vol. 20, Issue 1 · 25 Jul 2024 · 5,058 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleSurveying on Wheat Farmers' Access and Confidence to Information and Communication Channels (ICCs) about Controlling Eurygaster integriceps in Hamedan Province-IranHeshmatollah Saadi, Karim Naderi Mahdei, Reza MovahediToday, Generation new and various information and knowledge sources need new information and communication channels. The better selection of information and communication channels (ICCs), the more effectiveness of extension programs in agriculture. Surveying on wheat farmers’ access to sources of information and communication channels as ICCs about controlling Eurygaster integriceps Puton in Hamedan province of Iran is primary purpose in … …American Journal of Agricultural and Biological Sciences, Vol. 3, Issue 2 · 30 Jun 2008 · 8,058 accessesView PDFCite
Research ArticleOpen accessEvery word in the titlePerformance Evaluation of Channel Propagation Models and Developed Model for Mobile CommunicationYahia ZakariaPropagation models represent a solidifying of mathematical equations and algorithms that are used for radio signal propagation prediction in specific regions. In this research different propagation models are analyzed and compared. These propagation models have been proposed at the operating frequency of 3.8 GHz for different transmitter antenna heights in all types of terrain. These propagation models depend on location, … …American Journal of Applied Sciences, Vol. 14, Issue 2 · 25 Feb 2017 · 8,409 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEfficacy of Curcumin as an Immunostimulatory Dietary Supplement for Channel CatfishSaly Hafiz, Kunwar K. Srivastava, Joseph C. Newton et al.Natural agents such as curcumin may have the potential to enhance disease resistance in aquaculture. In this study, 30 catfish (Ictalurus punctatus), 2 years of age, were allotted to one of 3 treatment groups (n = 10) to receive diets supplemented with 0.0, 0.5, or 1.0% curcumin. Body weights and lengths of fish were taken at 0, 20, 40 and … …American Journal of Animal and Veterinary Sciences, Vol. 12, Issue 1 · 11 Jan 2017 · 8,326 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleNew Solution for Reducing Doppler Shift in the MB-OFDM System Over High Mobility Multipath Channel for V&I CommunicationSanaa Kabil, Raja Elassali, Fouzia Elbahhar et al.The MB-OFDM has been proposed as a good candidate to ensure Vehicle to Infrastructure communication (V&I). Fast moving vehicles present challenges for the proposed system especially for high mobility (250 km h-1). The main objective in this study is to study and investigate the impact of Doppler shift on the quality of transmitted/received signal in terms of Bit Error Rate … …American Journal of Applied Sciences, Vol. 12, Issue 3 · 29 Apr 2015 · 7,170 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleCombining Q-Learning and Multi-Layer Perceptron Models on Wireless Channel Quality PredictionAndrea L. Piroddi, Maurizio TorregianiOne of the most complex challenges that wireless communication systems will face in the coming years is the management of the radio resource. In the next years, the growth of mobile devices, forecast (CISCO, 2020), will lead to the coexistence of about 8.8 billion mobile devices with a growing trend for the following years. This scenario makes the reuse of … …American Journal of Engineering and Applied Sciences, Vol. 14, Issue 1 · 10 Mar 2021 · 6,761 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleLaminar Forced Convection and Heat Transfer Characteristics in a Square Channel Equipped with V-Wavy SurfaceAmnart Boonloi, Withada JedsadaratanachaiThe numerical investigations on flow pattern and heat transfer characteristic in a heat exchanger channel equipped with V-wavy surface are examined. The influences of the flow attack angles (α = 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55° and 60°) and wavy surface arrangements (V-tip pointing downstream called "V-Downstream", V-tip pointing upstream called "V-Upstream) are investigated for laminar regime, … …Journal of Mathematics and Statistics, Vol. 13, Issue 3 · 27 Jul 2017 · 6,806 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleLaminar Flow and Heat Transfer in a Square Channel Installed with Inclined Wavy SurfaceAmnart Boonloi, Withada JedsadaratanachaiLaminar flow and heat transfer characteristic in a square channel heat exchanger installed with inclined wavy surface are investigated numerically. The inclined wavy surface is designed with the main the aim to help the installation, production and maintenance when using the inclined wavy surface in the heat exchanger. The finite volume method with SIMPLE algorithm is selected to solve the … …Journal of Mathematics and Statistics, Vol. 13, Issue 2 · 25 May 2017 · 7,224 accessesView PDFCite