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324 articles for “x-ray”
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Research ArticleOpen accessIn the abstractInvestigating Bio-Char as Flow Modifier and Water Treatment Agent for Sustainable Pavement DesignRenaldo Walters, Shamim A. Begum, Elham H. Fini, Taher M. Abu-LebdehThe life expectancy of Asphalt Binder (AB) has been negatively impacted by the harsh bombardment of Ultraviolet (UV) rays. UV rays cause asphalt to oxidize faster, which results in the deterioration of asphalt's rheological characteristics that can lead to pavement distresses. This paper investigates merits of bio-char to improve asphalt aging susceptibility by blending one control binder (PG 64-22) and … …American Journal of Engineering and Applied Sciences, Vol. 8, Issue 1 · 22 Apr 2015 · 9,055 accessesView PDFCite
Research ArticleOpen accessIn the abstractIMPROVING THE PERFORMANCE AND REDUCING BIT ERROR RATE ON WIRELESS DEEP FADING ENVIRONMENT RECEIVERSK. Jayanthi, V. P. Arunachalam, C. VasanthanayakiOne of the major challenges in wireless communication system is increasing complexity and reducing performance in detecting the received digital information in indoor and outdoor Environments. Consequently to overcome this problem we analyze the delay performance of a multiuser with perfect channel state information transmitting data on deep fading environment. In this proposed system, the Wireless Deep Fading Environment (WDFE) … …Journal of Computer Science, Vol. 10, Issue 3 · 29 Nov 2013 · 7,103 accessesView PDFCite
Research ArticleOpen accessIn the abstractANALYSIS OF REDUCTION IN COMPLEXITY OF MULTIPLE INPUT- MULTIPLE OUTPUT-ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEMS WITH CARRIER FREQUENCY OFFSET ESTIMATION AND CORRECTIONSabitha Gauni, Kumar RamamoorthyOrthogonal Frequency Division Multiplexing (OFDM) is a promising research area in Wireless Communication for high data rates. The Multiple Input-Multiple Output (MIMO) technology when incorporated with the OFDM system promise a significant boost in the performance. But, the MIMO-OFDM systems are very sensitive to Carrier Frequency Offset (CFO) as it deteriorates the system performance with the rise of Inter-Carrier-Interference (ICI). … …Journal of Computer Science, Vol. 10, Issue 2 · 13 Nov 2013 · 6,791 accessesView PDFCite
Research ArticleOpen accessIn the abstractANALYSIS AND SOLUTION FOR MULTI-BAND ORTHOGONAL FREQUENCY-DIVISION MULTIPLEXING ULTRA WIDE BAND SYSTEM IN REAL ENVIRONMENT FOR VEHICLE TO INFRASTRUCTURE APPLICATIONSanaa Kabil, Raja Elassali, Fouzia Elbahhar et al.Many researches in the world deal with driving on the road to ensure optimum safety. In this context, several telecommunication technologies are often used to connect the vehicles via continuous wireless communication with the infrastructure, exchange data and information relevant to increase overall road safety and enable cooperative traffic management. These systems are not reliable for all situations and the … …Journal of Computer Science, Vol. 9, Issue 10 · 5 Sep 2013 · 7,012 accessesView PDFCite
Research ArticleOpen accessIn the abstractCassava Chip Drying by Using a Small-Scale Hot-Air Microwave OvenPatomsok WilaiponCharacteristics of cassava microwave hot-air drying were investigated in a 2-planes microwave hot-air dryer. The drying experiments were carried out at two levels of sample surface temperature set-points viz. 70 and 80°C respectively. Cassava (Rayong-9) with 2.5 kg weight and 61% moisture content on wet basis was dried in the dryer for about 5-5.3 h. It was found that the … …American Journal of Engineering and Applied Sciences, Vol. 6, Issue 2 · 6 Jun 2013 · 7,573 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Optimistic Adaptive Modulation Technique for Future Wireless CommunicationKugalur Muthusamy Palaniswamy, Veerappa Gounder PalanisamyThe Future Wireless Communication requires 100 Mbits/s Data rate, streaming audio/video, asymmetric access/multiple access, Adaptive modulation and coding, dynamic packet arrangement, smart antenna adaptation andIPv6 facility to enhance error free communication. Various digital modulation techniques have been taken for simulation and bit error rate is calculated in both MC-CDMA System and OFDMA system. The continuous phase modulation techniques ensures large … …Journal of Computer Science, Vol. 9, Issue 4 · 13 May 2013 · 6,453 accessesView PDFCite
Research ArticleOpen accessIn the abstractWirelesshd Video Transmission Over Multicarrier Error-CorrectionchannelsMohamed Khedr, Maha SharkasUncompressed High-Definition video streaming over extremely high frequency using wireless technologies, also known as WirelessHD, is a challenge problem because of the high data rate requirement and channel variations. The advantages in RF technology and the huge bandwidth available in the 57-66 GHZ millimeter wave open new era for High Definition applications and high data rates communication. Retransmission is not … …Journal of Computer Science, Vol. 8, Issue 11 · 6 Nov 2012 · 6,586 accessesView PDFCite
Research ArticleOpen accessIn the abstractStudies on the Seasonal Changes in Antioxidant Enzymes Activity on Differently, Polluted Areas along the Bay of Bengal Employing Perna viridis as an Animal ModelC. Amutha, P. SubramanianAntioxidants are the innate or acquired molecules capable of slowing down or preventing the oxidative damage (damage due to reactive oxygen species) that caused by free radicals. The antioxidant enzyme activity in response to season as well as hydrocarbon pollution was attempted. Rayapuram fishing harbor of Chennai (Station-1) is highly oil contaminated with oil sleeks on the surface. The relatively … …American Journal of Animal and Veterinary Sciences, Vol. 7, Issue 2 · 31 Jul 2012 · 7,670 accessesView PDFCite
Research ArticleOpen accessIn the abstractAnti-Microbial, Anti-Oxidant and Anti-Ulcerogenic Effects of Shilajit on Gastric Ulcer in RatsMohamed-I. Kotb El-Sayed, Hatem-K. Amin, Ali-G. Al-KafProblem statement: To evaluate the effects and mechanisms of action involved in anti-ulcer, antioxidant and antimicrobial activities of different native shilajit samples. Approach: Shilajit samples were collected in the mountain region of Yemen (Al-Jouf and Rayma), Russia (Tien-Shan) and India (Kumoan). Stomach ulcers were induced in rats by oro-gastric ingestion of ethanol/HCl. Pre-treatment with ranitidine (100 mg kg-1, p.o.) and … …American Journal of Biochemistry and Biotechnology, Vol. 8, Issue 1 · 10 Mar 2012 · 9,002 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffective Atomic Number of Lead Sodium Borate Glass Systems at 662 keVP. Limkitjaroenporn, W. Chewpraditkul, J. Kaewkhao, S. TuscharoenMass attenuation coefficients of glass systems xPbO: 20Na2O: (80-x)B2O3 (x = 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 and 55% mol) were determined at 662 keV photon energy using gamma rays transmission method. The theoretical values of mass attenuation coefficients were calculated by WinXCom program. These coefficients were then used to determine the effective atomic numbers of … …Energy Research Journal, Vol. 2, Issue 1 · 14 Feb 2012 · 8,302 accessesView PDFCite