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36 results for “Attenuation”
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Research ArticleOpen accessIn the abstractEffects of N-Acetylcysteine on Auditory Brainstem Response Threshold Shift in Rabbits Exposed to Noise and Carbon MonoxideSeyedbagher Mortazavi, Masoud Motalebi Kashani, Ali Khavanin et al.Problem statement: Noise Induced Hearing Loss (NIHL) is one of the most important occupational disease in worldwide. NIHL has been found to be potentiated by simultaneous Carbon monoxide (CO) exposure. Exposure to noise plus CO is common in occupational and environmental settings. Free radicals have been implicated in cochlear damage resulting from exposure to noise and due to CO hypoxia … …American Journal of Applied Sciences, Vol. 7, Issue 2 · 28 Feb 2010 · 8,044 accessesView PDFCite
EditorialOpen accessIn the abstractProtecting crop species from biotic and abiotic constraints in the era of Global Change: are we ready for this challenge?Marco Landi, Giovanni BenelliReliable and affordable supply of food is of crucial importance to the progress and stability of human societies. During the last century, we have assisted to an extraordinary increase of crop yields, especially for the most widespread and consumed crop species, such as rice, wheat, corn and soybean. The Broadbalk experiment, one of the oldest continuous agronomic experiments in the … …American Journal of Agricultural and Biological Sciences, Vol. 11, Issue 2 · 4 Jun 2016 · 8,402 accessesView PDFCite
HypothesisOpen accessIn the abstractCan Anthocyanins be Part of the Metal Homeostasis Network in Plant?Marco LandiAnthocyanins are a class of flavonoids with a high level of diversification and likely the most studied pathway of secondary metabolism in Plantae. Anthocyanins have raised a growing interest due to the huge variability of their chemical structures and the more new anthocyanins are isolated from plants, the more questions on their evolutionary and ecological meaning they raise. Antioxidant, photoprotection … …American Journal of Agricultural and Biological Sciences, Vol. 10, Issue 4 · 9 Dec 2015 · 8,573 accessesView PDFCite
Research ArticleOpen accessIn the abstractSemi Active Tuned Mass Dampers of Buildings: A Simple Control OptionDemetris Demetriou, Nikolaos Nikitas, Konstantinos Daniel TsavdaridisThe present study investigates the effectiveness of a Proportional-Integral-Derivative (PID) controlled Variable Damping Semi-Active Tuned Mass Damper (VD-STMD) on reducing the vibration response of an earthquake excited multi-storey structure. The effectiveness of the controlled system is evaluated by comparing the structure’s overall dynamic behavior against that of an equivalent similar structure equipped with a conventional optimally designed passive Tuned Mass … …American Journal of Engineering and Applied Sciences, Vol. 8, Issue 4 · 30 Oct 2015 · 9,658 accessesView PDFCite
Research ArticleOpen accessIn the abstractDetermination of Atmospheric Turbidity and its Correlation with Climatologically ParametersU. Ali Rahoma, A. H. HassanStudy of Atmospheric turbidity is important for purposes of meteorology, ecology, climatology and monitoring of atmospheric pollution. Linke Turbidity factor (LT) is commonly used to model the attenuation of solar radiation in the atmosphere. The probable dependence on the water vapor content of the relationship linking LT to Angstrom’s turbidity coefficient B, is discussed. In this study, a procedure for … …American Journal of Environmental Sciences, Vol. 8, Issue 6 · 28 Dec 2012 · 6,987 accessesView PDFCite
Research ArticleOpen accessIn the abstractCoscinium Fenestratum Protects Against Ethanol-Induced Neurodegeneration in Adult Rat BrainWathita Phachonpai, Jintanaporn Wattanathorn, Panakaporn Wannanon et al.Alcoholism is a serious problem throughout the world. Despite intensive efforts to develop novel therapeutics for strategy efficacy against neuronal loss leading to memory impairment in alcoholism is still limited. In view of the pitfalls of psychological dependence and adverse behavioral effects of synthetic drugs, the development of low toxicity and high efficiency medicines derived from natural herbal antioxidants exhibits … …American Journal of Pharmacology and Toxicology, Vol. 7, Issue 3 · 16 Aug 2012 · 8,607 accessesView PDFCite
Research ArticleOpen accessIn the abstractSharp Transition Multiband Filter in Speech Processing Scheme for Hearing ImpairedJoseph X. Rodrigues, Lucy J. Gudino, K. R. PaiProblem statement: A simple analytical approach to the synthesis of a sharp transition, linear phase, multiband FIR filter is presented. The filter magnitude response is modeled using trigonometric functions of frequency. Approach: Employing variable density of ripple cycles in passband and stopband regions with large density of ripples cycles at the sharp transition edges, reduces the abrupt discontinuities at these … …American Journal of Engineering and Applied Sciences, Vol. 5, Issue 1 · 27 Feb 2012 · 9,046 accessesView PDFCite
Research ArticleOpen accessIn the abstractLow-Loss Hand-Made Demultiplexer using Transparent Color Filter in WDM-POF Network for Short-Haul Communication SystemMohd Syuhaimi Ab. Rahman, L. S. Supian, Hadi Guna et al.Problem statement: Polymer optical fiber has advantages compared to other alternatives communication media such as copper, coax cable and glass fiber. POF has bigger bandwidth compared to wireless communication network and POF is also free from electromagnetic disruption. Since POF is suitable for communication system up to distance of 100 m with data speed of 400 Mbps using polymer step-index … …Journal of Computer Science, Vol. 8, Issue 4 · 30 Jan 2012 · 7,094 accessesView PDFCite
Research ArticleOpen accessIn the abstractIntelligent Model for Traffic Safety ApplicationsG. Nagappan, C. ChellappanProblem statement: This study presents an analysis on road traffic system focused on the use of communications to detect dangerous vehicles on roads and highways and how it could be used to enhance driver safety. Approach: The intelligent traffic safety application model is based on all traffic flow theories developed in the last years, leading to reliable representations of road … …Journal of Computer Science, Vol. 8, Issue 3 · 14 Jan 2012 · 6,727 accessesView PDFCite
Research ArticleOpen accessIn the abstractEvaluation of Hydrogen/Oxygen Release Compounds for the Remediation of VOCsS. Fiore, M.C. ZanettiProblem statement: Volatile Organic Compounds (VOCs) were widespread in groundwater of industrialized areas and in situ remediation intervents characterized by a high environmental compatibility were of main interest. The scope of this study was the evaluation of the potential of two innovative reagents (HRC and ORC from Regenesis) for the remediation of Volatile Organic Compounds (VOCs). The reagents respectively perform … …American Journal of Environmental Sciences, Vol. 7, Issue 5 · 4 Nov 2011 · 7,440 accessesView PDFCite