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309 results for “variance”
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Research ArticleOpen accessIn the keywordsFinding the Envelope and Efficient Frontier of Financial AssetsFarida Kachapova, Ilias KachapovProblem statement: One of the problems considered in financial mathematics is finding portfolios of given financial assets that minimize risk for targeted returns. The set of such portfolios is called the envelope of the assets. Traditionally this problem is solved as a calculus minimization problem involving partial derivatives and Lagrange multipliers. Approach: In this study we describe an invariant geometric … …Journal of Mathematics and Statistics, Vol. 8, Issue 3 · 16 Jul 2012 · 9,279 accessesView PDFCite
Research ArticleOpen accessIn the keywordsOther Post Employment Benefits-The Other Elephant in the RoomCatherine PlanteThe governments of the fifty states of the United States have made promises to past and present employees regarding retirement benefits-predominately pensions and healthcare coverage. The issues surrounding the pension obligations made to these employees have been well examined but the obligations due to promises of healthcare coverage have not received as much attention. There is great variance among the … …American Journal of Economics and Business Administration, Vol. 4, Issue 2 · 28 Apr 2012 · 7,473 accessesView PDFCite
Research ArticleOpen accessIn the keywordsDemotivating Factors for English Language Learning Among University StudentsReyhaneh Ghadirzadeh, Fariba Pourabolfathe Hashtroudi, Omid ShokriProblem statement: Demotivation is a relatively new issue in the field of second/foreign Language (L2) learning motivation. Recognizing and removing barriers can have a marked effect on motivation and attention to learning in general and ESL/EFL learning in particular. Demotivating factors are essential factors which negatively influence the learner’s attitudes and behaviors and hence lead to undesired learning outcomes. The … …Journal of Social Sciences, Vol. 8, Issue 2 · 21 Feb 2012 · 11,929 accessesView PDFCite
Research ArticleOpen accessIn the keywordsImage Compression using Space Adaptive Lifting SchemeRamu Satyabama, AnnaduraiProblem statement: Digital images play an important role both in daily life applications as well as in areas of research and technology. Due to the increasing traffic caused by multimedia information and digitized form of representation of images; image compression has become a necessity. Approach: Wavelet transform has demonstrated excellent image compression performance. New algorithms based on Lifting style implementation … …Journal of Computer Science, Vol. 7, Issue 11 · 29 Aug 2011 · 7,143 accessesView PDFCite
Research ArticleOpen accessIn the keywordsLand use Type Pattern and Woody Species Composition Near Human Disturbed Landscapes on Mount Makiling, Luzon IslandInocencio E. Buot, Katsuhiro OsumiProblem statement: A field study near human disturbed landscape on Mount Makiling, Luzon Island, Philippines was done on the eastern slopes of the legendary mountain to determine the land use patterns and woody species composition. Approach: Forty permanent plots of 10×10m in 3 belt transects spaced at 200m apart were established from the undisturbed forests to the agricultural farms. Classification … …American Journal of Environmental Sciences, Vol. 7, Issue 4 · 26 Aug 2011 · 8,033 accessesView PDFCite
Research ArticleOpen accessIn the keywordsStudy of the Effects Irrigation Water Sanity and pH on Production and Relative Absorption of some Elements Nutrient by the Tomato PlantHossein Afshari, Shahram Ashraf, Abdol Ghaffar Ebadi et al.Problem statement: This study was conducted to examine the effects of irrigation water pH and Salinity on the growth and absorption of P, Na, Ca, K by tomato. Approach:The study includes two Salinity and pH factors and is consisted from 12 treatment and three repetitions. Tomato seeding grown in foam trays were transplanted in the joune 2010 to bags filled … …American Journal of Applied Sciences, Vol. 8, Issue 8 · 18 Jul 2011 · 7,695 accessesView PDFCite
Research ArticleOpen accessIn the keywordsAdaptive Linear Prediction Augmented Autoregressive Integrated Moving Average Based Prediction for VBR Video TrafficT. Raghuveera, P. V.S. Kumar, K. S. EaswarakumarProblem statement: Network traffic prediction plays a vital role in the optimal resource allocation and management in computer networks. This study introduces an ARIMA based model augmented by Adaptive Linear Prediction (ALP) for the real time prediction of VBR video traffic. The synergy of the two can successfully address the challenges in traffic prediction such as accuracy in prediction, resource … …Journal of Computer Science, Vol. 7, Issue 6 · 14 Jun 2011 · 7,013 accessesView PDFCite
Research ArticleOpen accessIn the keywordsAssessment of Special Needs People Towards Environmental Awareness in the Hashemite Kingdom of JordanAyed Hanna Ziadat, Anf Hanna ZiadatProblem statement: This research examines knowledge and attitudes towards environmental awareness among special needs individuals in the Hashemite Kingdom of Jordan. The population census of (136) special needs individuals with different types of disabilities; physical impairments, visual impairments and hearing impairments from different locations of the Hashemite Kingdom of Jordan participated in the survey and completed the questionnaire in 2010. … …American Journal of Environmental Sciences, Vol. 6, Issue 5 · 31 Oct 2010 · 7,337 accessesView PDFCite
Research ArticleOpen accessIn the keywordsA Quantitative Study on Japanese Workers' Awareness to Information Security Using the Data Collected by Web-Based SurveyToshihiko TakemuraProblem statement: The researches in the field of social sciences such as economics and business management were not conducted until around 2000. Particularly, there are few empirical studies on information security. Primary reasons among various ones are that there is no data on information security countermeasures and we cannot easily use the data even if the data exist. Though it … …American Journal of Economics and Business Administration, Vol. 2, Issue 1 · 31 Mar 2010 · 7,860 accessesView PDFCite
Research ArticleOpen accessIn the keywordsThe Use of Taguchi Method to Determine Factors Affecting the Performance of Destination Sequence Distance Vector Routing Protocol in Mobile Ad Hoc NetworksHazura. Mohamed, Muhammad Hisyam Lee, Mazalan Sarahintu et al.In this study, Taguchi method was used to identify the several factors that may affect the performance of Destination Sequence Distance Vector (DSDV) routing protocol. The performance of DSDV routing protocol in mobile ad hoc networks were greatly influence by factors such as node speed, node pause time and traffic load. Problem statement: By using orthogonal experimental design and analysis … …Journal of Mathematics and Statistics, Vol. 4, Issue 4 · 31 Dec 2008 · 7,797 accessesView PDFCite