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Search Results: 1 - 10 of 461598 matches for " Sunday A. Reju "
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Post-Optimality Analysis of Energy Consumption Model and Utility Application  [PDF]
Sunday A. Reju, Gideon Gope
Open Journal of Applied Sciences (OJAppS) , 2014, DOI: 10.4236/ojapps.2014.414052
Abstract: Problems associated with energy distribution, consumption and management are undoubtedly some of the most significant problems that energy utilities face globally. For instance, when development takes place, the demand for electrical power and in particular domestic electrical energy also increases. Thus improvement of energy distribution policies becomes important for utilities and energy decision making agencies. The authors had earlier [1] [2] provided a mixed strategy 2-player game model for a residential energy consumption profile for winter and summer seasons of the year using a dual-occupancy high-rise (11-storey) building located within the Polytechnic of Namibia, Windhoek. The optimum energy values and the corresponding probabilities obtained from the model extend the usual simple statistical analyses of minimum and maximum energy values and their associated percentages. The time-block and the week-day strategies depict critical probabilistic values worth considering for decision purposes, especially, the necessity and justification for a dual tariff regime for the residential and workplace residents of the building as against the existing institutional uniform energy tariff policy. However, this paper presents extended results of post-optimality analyses for the winter and summer seasons, and thus provides the optimal range of energy values over which the energy consumption can change without changing the optimal tariff estimate parameters obtained from the mixed strategy of critical energy game values. The post-optimality analyses also provide extended information on the mixed strategy of non-optimal week-day solutions obtained from the game model, hence validating one of the essential roles of sensitivity analysis, namely, investigation of sub-optimal solutions. From application point of view, the post-optimality model provides a useful tool for Utilities, especially for identifying flexibility range of optimal break-even energy values for consumers, such as in the informal settlements where metering is rather a challenge to determine varied or non-uniform tariffs.
Optimum Gain Analysis Using the Principle of Game Theory
Musa Danjuma SHEHU,Sunday A. REJU
Leonardo Journal of Sciences , 2008,
Abstract: The formulation of game problems is one of the most important tools that is being used to solve many practical problems. For example, organisations need to make decisions about how to locate their branches in different locations for optimum profit. This paper employs the principle of game theory to provide strategies required for optimal location of two competitive organisational branching systems.
Penalty Cost for One-Dimensional Energized Wave Equation
Victor O. WAZIRI,Sunday A. REJU
Leonardo Journal of Sciences , 2007,
Abstract: This paper constructs the penalty cost functional for optimizing the one-dimensional energized wave control operator. In some multiplier methods such as the Lagrange multipliers and Conjugate Gradient Method (CGM), the cost of augmenting the dynamical constraint equation into an unconstraint formulation involving an integral objective functional is guessed. The Extended Conjugate Gradient Method (ECGM) demands that the penalty cost functional be determined by computational procedure. The functional is completely given in terms space x and time dependent variable t.
Developing and Deploying OERs in sub-Saharan Africa: Building on the Present
Clayton R. Wright,Sunday A. Reju
International Review of Research in Open and Distance Learning , 2012,
Abstract: Open educational resources (OERs) have the potential to reduce costs, improve quality, and increase access to educational opportunities. OER development and deployment is one path that could contribute to achieving education for all. This article builds on existing information and communication technology (ICT) implementation plans in Africa and on the experiences of organizations and initiatives such as the African Virtual University (AVU), OER Africa, the South African Institute of Distance Education (SAIDE), and the Teacher Education in Sub-Saharan Africa (TESSA) Project, to present one view of the benefits, challenges, and steps that could be taken to realize the potential of OERs in sub-Saharan Africa. Thus, the article focuses on the factors necessary for creating and sustaining a vision for OER development and deployment; developing and distributing resources with an open license; improving technology infrastructure and reducing the cost of Internet access; establishing communities of educational collaborators; sustaining involvement in the OER initiative; producing resources in interoperable and open formats; establishing and maintaining the quality of OERs; providing local context to address national and regional needs and conditions; informing the public about OERs; and taking the initiative to build on the knowledge, skills, and experiences of others. In order to assist educators and decision makers, links to a variety of resources are provided.
Markov Decision Model and the Application to the Cost of Treatment of Leprosy Disease
Usman Yusuf ABUBAKAR,Sunday A. REJU,Bamidele O. AWOJOYOGBE
Leonardo Journal of Sciences , 2007,
Abstract: A Markov decision model is applied to determine the optimal cost of drugs in the treatment of leprosy disease. The result shows that the minimum cost is obtained if the Doctor is visited and the patient is placed on the MDT instead of traditional treatment and Dopsone monotherapy. The paper presents a theoretical framework to study the cost of treatment of leprosy where the relevant data could be obtained.
Recurring Issues Encountered by Distance Educators in Developing and Emerging Nations
Clayton R. Wright,Gajaraj Dhanarajan,Sunday A. Reju
International Review of Research in Open and Distance Learning , 2009,
Abstract: This article explores a number of challenges faced by e-learning or distance educators in developing and emerging countries, provides a context for many of the challenges, and outlines some measures devised to overcome them. These educators must determine a sound rationale for employing online learning, recognize that technology is only part of the educational transformation process, address the lack of infrastructure and the cost of Internet bandwidth and equipment, counter the cultural imperialism of courseware from Western nations, deal with limited educational resources, place a greater emphasis on quality assurance systems and change negative perceptions of distance education, respond to the needs and concerns of both students and faculty, access or develop up-to-date educational resources, and consider the implementation of mobile learning. The continued growth and success of distance education in developing and emerging nations will depend on the extent to which issues covered in this article are addressed as they bear on the quality of the learning experience provided to students.
The Analysis of the Two-dimensional Diffusion Equation With a Source
Victor Onomza WAZIRI,Sunday Augustus REJU
Leonardo Electronic Journal of Practices and Technologies , 2006,
Abstract: This study presents a new variant analysis and simulations of the two-dimensional energized wave equation remarkably different from the diffusion equations studied earlier studied. The objective functional and the dynamical energized wave are penalized to form a function called the Hamiltonian function. From this function, we obtained the necessary conditions for the optimal solutions using the maximum principle. By applying the Fourier solution to the first order differential equation, the analytical solutions for the state and control are obtained. The solutions are simulated to give visual physical interpretation of the waves and the numerical values.
Implementation of the Extended Conjugate Gradient Method for the Two-Dimensional Energized Wave Equation
Victor Onomza WAZIRI,Sunday Augustus REJU
Leonardo Electronic Journal of Practices and Technologies , 2006,
Abstract: The paper computes the optimal control and state of the two-dimensional Energized wave equation using the Extended Conjugate gradient Method (ECGM). This piece of work has to do with all the vital computational elements as derived in the implementation of the ECGM algorithm on the two-dimensional Energized Wave equation in (Waziri, 1) and (Waziri & Reju, LEJPT & LJS, Issues 9, 2006, [7-9]). With these recalls, program codes were derived which gave various numerical optimal controls and states. These optimal controls and states were considered at various points in a plane surface.
Control Operator for the Two-Dimensional Energized Wave Equation
Victor Onomza WAZIRI,Sunday Augustus REJU
Leonardo Journal of Sciences , 2006,
Abstract: This paper studies the analytical model for the construction of the two-dimensional Energized wave equation. The control operator is given in term of space and time t independent variables. The integral quadratic objective cost functional is subject to the constraint of two-dimensional Energized diffusion, Heat and a source. The operator that shall be obtained extends the Conjugate Gradient method (ECGM) as developed by Hestenes et al (1952, [1]). The new operator enables the computation of the penalty cost, optimal controls and state trajectories of the two-dimensional energized wave equation when apply to the Conjugate Gradient methods in (Waziri & Reju, LEJPT & LJS, Issues 9, 2006, [2-4]) to appear in this series.
The Penalty Cost Functional for the Two-Dimensional
Victor Onomza WAZIRI,Sunday Augustus REJU
Leonardo Journal of Sciences , 2006,
Abstract: This paper constructs the penalty cost functional for optimizing the two-dimensional control operator of the energized wave equation. In some multiplier methods such as the Lagrange multipliers and Pontrygean maximum principle, the cost of merging the constraint equation to the integral quadratic objective functional to obtain an unconstraint equation is normally guessed or obtained from the first partial derivatives of the unconstrained equation. The Extended Conjugate Gradient Method (ECGM) necessitates that the penalty cost be sequentially obtained algebraically. The ECGM problem contains a functional which is completely given in terms of state and time spatial dependent variables.
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