The objective of this dissertation is to do the analysis of rentals in chosen locations and point out the factors with influence on level of rentals. There is 10 apartments in each category and location. Results are compared, described andpresented in graphical form.

Abstract Flying is a three dimensional exercise that is combined with time. It includes application of theory, realistic space handling and management of time. In order to let pilot feel the handling, tempo, movement in space, aircraft attitude and radio communication procedure for flying, it is a brand new challenge to develop digitization teaching material of flying handling skill for audio/video and assisting of simulation machine function weak point of the visual effect, use it to help student pilot with understanding the knowledge of flying handling. This research initially statistically analyzed the training completion and drop-out data of 18 Basic Flying Training classes of the Chinese Air Force Academy, from the academic year of 88 to 92. The research found that the traffic pattern phase has 21.8% of drop-out rate among the 35.2% of the whole training drop-out rate. Furthermore, 16 out of 18 classes had the highest drop-out rate during the traffic pattern phase. Therefore, The purpose of this research lies in offering digitization teaching material for audio/video in order to help student pilot with understanding and learning the flying skill for traffic pattern, in hopes of assisting student pilot on handling and concept and providing effective learning method and technical instruction for both the student pilot and the training unit to advance the performance of flying training. The question of this research includes: 1. Novel flying training and teaching assistance equipments. 2. Raising the traffic pattern phase training completion rate. 3. Raising the traffic pattern phase training performance. 4. Investigating the potential problems associated with flying training. The researcher is currently the Chinese Air Force Academy instructor pilot. Therefore, the researcher hopes through studying the law as the main research approach with oneself action of action research.In this research, the researcher except that collect putting to documents in order and devotes to develop digitization teaching material for audio/video and select two of the flying training classes of the current academic year, coordinating with the basic flying training schedule of the Chinese Air Force Academy. There will be surveys and interviews with case study through analysis tool for analyzing research data, after applied the traffic pattern digital Audio/Video. Lastly, the research procedure and data analysis will discover that action research has important value in the field of flight training and conclude critical influence factors for the teaching media aspect, unit administration aspect, flying training actual practice aspect, and flying students¡¦ aspect, in order to provide training advice and future research direction. Keywords: Traffic Pattern¡BTraining Performance¡BCritical Influence Factor¡BAction Research¡BDigital Audio/Video Learning Material

Opsomming Daar bestaan 'n behoefte aan 'n objektiewe maatstaf om die gehalte van akademiese publikasies te bepaal en te vergelyk. Hierdie navorsing het die invloed of reaksie wat deur 'n publikasie gegenereer is uit verwysingsdata bepaal. Daar is van 'n iteratiewe algoritme gebruik gemaak wat gewigte aan verwysings toeken. In die Internetomgewing word hierdie benadering reeds met groot sukses toegepas deur onder andere die PageRank-algoritme van die Google soekenjin. Hierdie en ander algoritmes in die Internetomgewing is bestudeer om 'n algoritme vir akademiese artikels te ontwerp. Daar is op 'n variasie van die PageRank-algoritme besluit wat 'n Invloedwaarde bepaal. Die algoritme is op gevallestudies getoets. Die empiriese studie dui daarop dat hierdie variasie spesialisnavorsers se intu¨ıtiewe gevoel beter weergee as net die blote tel van verwysings. Abstract Ranking of journals are often used as an indicator of quality, and is extensively used as a mechanism for determining promotion and funding. This research studied ways of extracting the impact, or influence, of a journal from citation data, using an iterative process that allocates a weight to the source of a citation. After evaluating and discussing the characteristics that influence quality and importance of research with specialist researchers, a measure called the Influence factor was introduced, emulating the PageRankalgorithm used by Google to rank web pages. The Influence factor can be seen as a measure of the reaction that was generated by a publication, based on the number of scientists who read and cited itA good correlation between the rankings produced by the Influence factor and that given by specialist researchers were found. / Mathematical Sciences / M.Sc. (Operasionele Navorsing)

Opsomming Daar bestaan 'n behoefte aan 'n objektiewe maatstaf om die gehalte van akademiese publikasies te bepaal en te vergelyk. Hierdie navorsing het die invloed of reaksie wat deur 'n publikasie gegenereer is uit verwysingsdata bepaal. Daar is van 'n iteratiewe algoritme gebruik gemaak wat gewigte aan verwysings toeken. In die Internetomgewing word hierdie benadering reeds met groot sukses toegepas deur onder andere die PageRank-algoritme van die Google soekenjin. Hierdie en ander algoritmes in die Internetomgewing is bestudeer om 'n algoritme vir akademiese artikels te ontwerp. Daar is op 'n variasie van die PageRank-algoritme besluit wat 'n Invloedwaarde bepaal. Die algoritme is op gevallestudies getoets. Die empiriese studie dui daarop dat hierdie variasie spesialisnavorsers se intu¨ıtiewe gevoel beter weergee as net die blote tel van verwysings. Abstract Ranking of journals are often used as an indicator of quality, and is extensively used as a mechanism for determining promotion and funding. This research studied ways of extracting the impact, or influence, of a journal from citation data, using an iterative process that allocates a weight to the source of a citation. After evaluating and discussing the characteristics that influence quality and importance of research with specialist researchers, a measure called the Influence factor was introduced, emulating the PageRankalgorithm used by Google to rank web pages. The Influence factor can be seen as a measure of the reaction that was generated by a publication, based on the number of scientists who read and cited itA good correlation between the rankings produced by the Influence factor and that given by specialist researchers were found. / Mathematical Sciences / M.Sc. (Operasionele Navorsing)

Indoor light energy harvesting plays an important role in field of renewable energy. Indoor lighting condition is usually described by level of illumination. However, measured data alone does not by classification of different light sources, result is not representative. Energy harvesting system needs to be evaluated after classification to obtain more accurate value. This is also importance of different light source classification. In this thesis, a complete set of indoor light energy harvesting system is introduced, two models are proposed to evaluate energy, robustness is improved by mixing complex light condition during data collection. Main task of this thesis is to verify importance of indoor light classification. Main contribution of this thesis is to fill a gap in energy evaluation, and built a model with superior performance. In terms of collecting data, this thesis researches influence factor of data collection to ensure reliability of accuracy. This work can more accurately collect spectral under different light conditions. Finally, light energy is evaluated by classification of indoor light. This model is proven to be closer to true energy value under real condition. The result shows that classified data is more accurate than direct calculation of energy,it has a smaller error. In addition, performance of classifier model used in this thesis has been proven to be excellent, classifier model can still carry on high-accuracy classification when measurement data are not included in training data set. This makes it a low-cost alternative to measuring light condition without spectrometer.

Nowadays, municipal solid waste (MSW) has got great attention from world-wide decision makers in the field of waste management. When they are making a MSW management decision, there are lots of factors that may influence their final decision for picking up an optimal alternative. In order to find out the influence factors in municipal solid waste management decision-making, incineration and anaerobic fermentation techniques are selected as example for comparison. Literature study and interview are used for collecting theoretical and practical information respectively. A list of theoretical influence factors is created, which integrates environmental, social and financial aspects of incineration and anaerobic fermentation. This list can help the decision-maker to have a better choice when they are choosing an alternative from MSW management methods. Practical information is achieved by interviewing the City of Stockholm Waste Management Administration. Differences are revealed between theory and the Stockholm case. The priority of each influence factor is discussed in this paper. Base on the decision between theoretical factors and the Stockholm case, the result shows that the theoretical factors are not completely sufficient for the practical use in the city of Stockholm. The list of theoretical influence factors should be extended by integrating more factors and more MSW management alternatives to meet different requirements in practical cases. There is no clear definition on which factor has the highest degree of influence for the decision-maker. The priority of influence factors is depended on the local condition and subjective choice of decision-maker. / www.ima.kth.se

Costa Rica’s annual mean precipitation is above 3300 mm, but this precipitation is not evenly distributed in time or space, producing clear differentiated wet and dry seasons in most of the country. Droughts are also common phenomena which greatly affect the availability of water resources. Managed aquifer recharge (MAR) schemes are being taken into consideration to enhance the underground water storage capacity of the country. The present study constitutes the first assessment for the identification of suitable sites for the implementation of MAR technology spreading methods (SM) in Costa Rica. The suitable sites are identified by means of a geographic information system multi-criteria decision analysis (GIS-MCDA) based on four criteria: hydrogeological aptitude, terrain slope, top soil texture and drainage network density. Four steps are performed in order to identify these sites: problem definition, screening for suitable areas, suitability mapping, and sensitivity analysis. The suitability map was divided in two zones after the screening: suitable and unsuitable, the first zone was further divided in five classes according to the weighted linear combination (WLC) ranking. The results indicate that 61% of the country is suitable for conducting SM. This map is a tool for future implementation of MAR techniques in the country.

Costa Rica’s annual mean precipitation is above 3300 mm, but this precipitation is not evenly distributed in time or space, producing clear differentiated wet and dry seasons in most of the country. Droughts are also common phenomena which greatly affect the availability of water resources. Managed aquifer recharge (MAR) schemes are being taken into consideration to enhance the underground water storage capacity of the country. The present study constitutes the first assessment for the identification of suitable sites for the implementation of MAR technology spreading methods (SM) in Costa Rica. The suitable sites are identified by means of a geographic information system multi-criteria decision analysis (GIS-MCDA) based on four criteria: hydrogeological aptitude, terrain slope, top soil texture and drainage network density. Four steps are performed in order to identify these sites: problem definition, screening for suitable areas, suitability mapping, and sensitivity analysis. The suitability map was divided in two zones after the screening: suitable and unsuitable, the first zone was further divided in five classes according to the weighted linear combination (WLC) ranking. The results indicate that 61% of the country is suitable for conducting SM. This map is a tool for future implementation of MAR techniques in the country.