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Research ArticleOpen accessEvery word in the titleThe Effect of Temperature on the Performance of Uncooled Semiconductor Laser Diode in Optical NetworkMohammad Syuhaimi Ab-Rahman, Nurain Izzati ShuhaimiProblem statement: The characteristics of a laser diode are highly dependent on the temperature of the laser chip. Thus, the effect of temperature on the network performance of uncooled semiconductor laser diode are studied by simulating its equivalent electrical circuit, developed from the rate equations that governing optical components directly into an electrical simulation framework. Approach: The simulations are carried … …Journal of Computer Science, Vol. 8, Issue 1 · 29 Oct 2011 · 7,685 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleMathematical Genesis of the Spatio-Temporal Covariance FunctionsGema Fernández-Avilés, Jose-María Montero, Jorge MateuProblem statement: Obtaining new and flexible classes of nonseparable spatio-temporal covariances have resulted in a key point of research in the last years within the context of spatiotemporal Geostatistics. Approach: In general, the literature has focused on the problem of full symmetry and the problem of anisotropy has been overcome. Results: By exploring mathematical properties of positive definite functions and … …Journal of Mathematics and Statistics, Vol. 7, Issue 1 · 31 Jan 2011 · 7,938 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffect of Temperature on the Color of Natural Dyes Extracted Using Pressurized Hot Water Extraction MethodNursyamirah Abd Razak, Siti Marsinah Tumin, Ruziyati TajuddinProblem statement: Traditionally, extraction of natural dyes with boiling method produced only one single tone of colorant/dyes which involved plenty of water in several hours of extraction time. A new modern extraction technique should be introduced especially to textile dyers so that a variety of tone of colorants can be produced in a shorter time with less consumption of water. … …American Journal of Applied Sciences, Vol. 8, Issue 1 · 31 Jan 2011 · 9,850 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleThe Sintering Temperature Effect on the Shrinkage Behavior of Cobalt Chromium AlloyM. Ghazali Kamardan, N. Hidayah A. Zaidi, M. Noh Dalimin et al.Problem Statement: Co-Cr based alloys which is well known for its high Young’s modulus, fatigue strength, wear resistance and corrosion resistance is an important metallic bio-material. However, till date there are only two type of Co-Cr alloy which are the castable and wrought cobalt alloy. Powder Metallurgy route for cobalt is expected to give better result of Co-Cr alloy. The … …American Journal of Applied Sciences, Vol. 7, Issue 11 · 8 Nov 2010 · 7,792 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleSeasonal Variation of Soil Resistivity and Soil Temperature in Bayelsa StateJohn Tarilanyo Afa, C. M. AnaeleProblem statement: Due to the climatic variation for the year and it's sever harmattan during the month of December to March with the high keraunic level (80-90) in the areas, it was necessary to know the seasonal variation of soil resistivity. The seasonal variation and the nature of soil have considerable influence on electrical characteristics and therefore affect the earthling … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 4 · 5 Nov 2010 · 8,724 accessesView PDFCite
Research ArticleOpen accessEvery word in the titlePotted Plants on Flat Roof as a Strategy to Reduce Indoor Temperature in Malaysian ClimateAsmat Ismail, Muna Hanim Abdul Samad, Abdul Malek Abdul RahmanProblem statement: The phenomenon of global warming or climate change has led to many environmental issues including higher atmospheric temperatures, intensive precipitation, increase greenhouse gaseous emission and of course increase indoor discomfort condition. Researchers worldwide collectively agreed that one way of reducing the impact of global warming is by implementing green roof technology which integrates vegetation, growing medium and water … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 3 · 30 Sep 2010 · 8,664 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleNatural Ventilation of Indoor Air Temperature: A Case Study of the Traditional Malay House in PenangAhmad Sanusi Hassan, Mahyuddin RamliProblem statement: It was the aim of the study to analyze the level of performance of natural air ventilation with a case study of the traditional Malay house in Penang, Malaysia. This study provided information on the architectural design in relation to natural air ventilation. It promoted passive design in contrast to most housing design which has poor natural air … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 3 · 30 Sep 2010 · 11,956 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffect of Equilibration Temperature on In vitro Viability and Subsequent Embryo Development of Vitrified-Warmed Immature Bovine OocytesHajarian Hadi, H. Wahid, O. Abas Mazni et al.Problem statement: Vitrification is replacing conventional slow freezing to cryopreserve gametes and embryos especially for in vitro production of embryo in domestic animal species. However, the results are still not satisfactory. The aim of this experiment was to study the effect of different equilibration temperatures on in vitro viability of immature bovine oocytes after vitrification. Approach: Oocytes were obtained from … …American Journal of Animal and Veterinary Sciences, Vol. 5, Issue 2 · 1 Sep 2010 · 16,116 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleRobust Template Matching Using Orthogonal Legendre Moment InvariantsKhalid M. HosnyProblem statement: Template matching is a famous methodology that has a wide range of applications in image and signal processing. For a template and input image, template matching methodology finds the partial input image that is most closely matches the template image in terms of specific criterion such as the Euclidean distance or cross-correlation. Approach: In this study, a fast … …Journal of Computer Science, Vol. 6, Issue 10 · 30 Jul 2010 · 7,617 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffect of Different Uniform Temperature with Thickness-Wise Linear Temperature Gradient on Interfacial Stresses of a Bi-Material AssemblyD. Sujan, Z. Oo, M. V.V. Murthy, K. N. SeetharamuProblem statement: The thermal mismatch induced interfacial stresses are one of the major reliability issues in electronic packaging and composite materials. Consequently an understanding of the nature of the interfacial stresses under different temperature conditions is essential in order to eliminate or reduce the risk of structural and functional failure. Approach: In this analysis, a model was proposed for the … …American Journal of Applied Sciences, Vol. 7, Issue 6 · 30 Jun 2010 · 7,068 accessesView PDFCite