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Jul. 2007, Aug. 2007, Sep. 2007, Oct. 2007, Nov. 2007, Dec. 2007, 2008


Issue 12, Volume 4, December 2007
Print ISSN: 1790-1979
E-ISSN: 2224-3410








Title of the Paper: University Timetabling Using Evolutionary Computation


Authors: Supachate Innet, Nawat Nuntasen

Abstract: University timetabling problems have been interested by many researchers for more than a decade. However, there is no appropriated solution or computation model available to solve these problems successfully. This is because of many different version of timetabling problems. In this paper, a noval approach of Genetic Algorithm (GA) for solving educational timetabling problem is proposed, including the constraints statements, the definition of a hierarchical structure for the fitness function, and the generalized genetic operators, which can be applied to matrices representing timetables. The paper focuses on lecturing timetables only, but not the examinational timetabling. The crossover rate and mutation rate were varied to conduct effective results and they shows that the given appropriate crossover rate of 50% and mutation rate of 50% is the best ratio to solve university timetabling problems.

Keywords: Scheduling, Genetic Algorithm, Evolutionary Computation, University Timetabling Problems

Title of the Paper: Improving K-12’s Logical Thinking Abilities using Educational Programming Language ‘Dolittle’


Authors: Seungwook Yoo, Seungeun Cha, Wongyu Lee

Abstract: New Korean information education curriculum effective from 2010 specially emphasizes problem solving using computer. Therefore it is necessary to conduct ‘programming education’ during information education curriculum. Experimental programming courses have been performed for 265 9th grade students and measured improvement of logical thinking ability that is necessary for problem solving. The language used for experiment course was ‘Dolittle’ and experimental courses were given for 16 weeks, I hour per week, with learning guideline previously prepared. Logical thinking test performed before and after the programming courses showed the positive changes of students logical thinking and also it showed programming education affects sub-factors of logical thinking. As a result of this study, educational programming language that lowered cognitive load for Korean 9th grade information education curriculum aided improvement of logical thinking that is necessary for problem solving using computer.

Keywords: educational programming language, logical thinking, problem solving

Title of the Paper: Energy Efficiency in Croatian Residential and Service Sector – Analysis of Potentials, Barriers and Policy Instruments


Authors: Vesna Bukarica, Zeljko Tomsic

Abstract: Energy efficiency is recognized worldwide as a single most powerful and cost-effective way for achieving goals of sustainable development. Energy efficiency being typically demand side option is hard to implement and requires carefully defined approach, i.e. policy interventions are needed to fulfill existing potentials for cost-effective efficiency improvements. In the light of recent trends in energy sector, especially liberalization and competitive market orientation, policy measures to enhance energy efficiency improvements should shift from strictly end-users oriented approach towards whole market approach. Optimal policy instruments mix should be designed to fulfill the existing energy efficiency improvement potentials and shift markets towards more energy efficient products and services. This paper addresses the energy end-use efficiency potentials in Croatia with special emphasis on residential and service sectors. It analyses the process of designing, implementing and evaluating policy instruments based on the results of the on-going UNDP/GEF project “Removing barriers to improving energy efficiency of the residential and service sector”. The analysis of energy efficiency market development and transformation in the Republic of Croatia is given and future actions needed emphasized.

Keywords: energy efficiency, policy, market transformation, Croatia

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