6 articles for “mean-variance relation”

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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 PDF Cite

Research ArticleOpen accessIn the abstractOptimisation of Plant Mineral Nutrition, Growth Stimulation and Yield Enhancement Through the Use of a Bio Formulation Based on Phosphate Solubilising BacteriaZhanar Zhumadilova, Laura Tokhetova, Gulsim Baimbetova et al.The aim of this study was to evaluate the agronomic and fodder efficiency of various fertilisation treatments in relation to their effects on plant growth, chemical composition, and soil properties. The study evaluated the effectiveness of a bio-formulation based on Phosphate-Solubilising Bacteria (PSB) in combination with mineral fertiliser (N60P90 + N30) in enhancing the productivity of forage crops and improving … …OnLine Journal of Biological Sciences, Vol. 26, Issue 3 · 23 Sep 2026 · 385 accessesView PDF Cite

Research ArticleOpen accessIn the abstractThe Impact of CRM on the Customer Satisfaction in Agricultural BankMohammad Ali Sarlak, Rasool Sanavi FardProblem statement: There is much research on this subject, but none of them is about the use of customer relationship management for boosting the bank customer satisfaction. While we have not any study about customer satisfaction in Agricultural Bank especially in Qom providence. Approach: The research method was applied one and from viewpoint of the process, was considered to be … …American Journal of Economics and Business Administration, Vol. 1, Issue 2 · 30 Jun 2009 · 8,179 accessesView PDF Cite

Research ArticleOpen accessIn the abstractAssessing the Performance of Jordanian Educational Counselors in the Environment of Private and Government Schools toward Gifted StudentsAyed Hanna ZiadatProblem statement: The objective of this research was to evaluate the needs of suitable environment for educational counselors to provide support and enhance the capabilities of gifted students for better education and behavior performance during their academic school years. This study emphasizes with more details on the impact of the educational counselors experience, gender and schools environment regarding the role … …American Journal of Applied Sciences, Vol. 8, Issue 2 · 28 Feb 2011 · 6,956 accessesView PDF Cite

Research ArticleOpen accessIn the abstractForecasting Gold Prices Using Multiple Linear Regression MethodZ. Ismail, A. Yahya, A. ShabriProblem statement: Forecasting is a function in management to assist decision making. It is also described as the process of estimation in unknown future situations. In a more general term it is commonly known as prediction which refers to estimation of time series or longitudinal type data. Gold is a precious yellow commodity once used as money. It was made … …American Journal of Applied Sciences, Vol. 6, Issue 8 · 31 Aug 2009 · 11,091 accessesView PDF Cite

Research ArticleOpen accessIn the abstractImprovement Mechanisms of Management Information System (MIS) In Iran's Agricultural Extension OrganizationAli Asadi, Abdolmotalleb Rezaei, Ahmad RezvanfarThis research describes the MIS improvement mechanisms in Iran's Agricultural Extension Organization. A survey study was applied as a methodology of research work. Data were collected using a structured questionnaire that addressed to evaluating managers’ responses regarding to MIS improvement mechanisms. All mechanisms had mean score greater than 5 as perceived by managers which implied that most mechanisms are moderately … …American Journal of Agricultural and Biological Sciences, Vol. 3, Issue 2 · 30 Jun 2008 · 7,865 accessesView PDF Cite