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Mobile base language learner
No full textA dissertation submitted to the Department of Information Technology for the MSc ; CD Rom includedABSTRACT
With the increasing popularity of the Internet, people worldwide want to access the Internet from anywhere at anytime. People no longer want to restrict themselves to accessing the World Wide Web from their personal computers. Instead, they want to access the Internet from any mobile device, such as Pocket PC handholds, mobile phones, and so on. To make this possible, software developers are developing applications that can be accessed from mobile devices those are called mobile applications./
The objective of this project is to develop a system to learn foreign languages using mobile technology. This Wireless Application Protocol (WAP) enabled dynamic site named ""Mobile based Language Learner" also called hereafter as MLL will provide unique features to mobile subscribers namely navigation through lessons and download lesson files and listen and functionality of dictionary./
MLI. have registration process if a new user navigates the system. This can be done through admin of the system (on a request). System contains selection of languages and selection of level which subscriber can choose upon his or her knowledge. Lessons are formed in such a way that subscribers can easily understand start to end. There is an option to download the sound file of that lesson and subscriber can listen./
T he administration of the system is done by using another web application and it includes user registration, upload data to the database and view reports ectABSTRACT
With the increasing popularity of the Internet, people worldwide want to access the Internet from anywhere at anytime. People no longer want to restrict themselves to accessing the World Wide Web from their personal computers. Instead, they want to access the Internet from any mobile device, such as Pocket PC handholds, mobile phones, and so on. To make this possible, software developers are developing applications that can be accessed from mobile devices those are called mobile applications./
The objective of this project is to develop a system to learn foreign languages using mobile technology. This Wireless Application Protocol (WAP) enabled dynamic site named ""Mobile based Language Learner" also called hereafter as MLL will provide unique features to mobile subscribers namely navigation through lessons and download lesson files and listen and functionality of dictionary./
MLI. have registration process if a new user navigates the system. This can be done through admin of the system (on a request). System contains selection of languages and selection of level which subscriber can choose upon his or her knowledge. Lessons are formed in such a way that subscribers can easily understand start to end. There is an option to download the sound file of that lesson and subscriber can listen./
T he administration of the system is done by using another web application and it includes user registration, upload data to the database and view reports ec
An Application of two factor theory and preferred job characteristics : an empirical investigation of IT professional's perception in Sri Lanka
No full textA dissertation submitted to the Department of Computer Science and Engineering for the Degree of Master of Business of Administration in Information TechnologyAbstract
IT professional's acting towards software development company goals and having a strong desire to remain in the company are very important for the success of a software development company. In order to generate such organizational commitment of the employees, the knowledge about what motivates and satisfies them is essential.
The purpose of this study is to investigate and analyze the factors, which motivate IT professional's in Sri Lanka using Herzberg's two-factor theory and Hackman-Oldman job characteristics model./ The factors examined in this study are analyzed according to the personal demographics factors such as age, gender, civil status, designation, service in the current company and total service in IT field, and number of employees in a company. In the study survey questionnaire was used for data collection. 159 randomly selected IT Professionals who were all graduates working in software companies in Sri Lanka participated in the study. Data was analysed using SPSS 11.5 software and MS Excel./
The study confirmed that the most of the hygiene factors which were defined by Herzberg'stheory, moved towards the motivation direction while most of the motivation factors which were defined by Herzberg's theory, become less important motivation factors./
It implied that order ofthe variables of this study was different from that of the priority order of initial Her/berg's findings. Overall, the achievement was the highest ranked as motivator and advancement was ranked as only hygiene factor.Further, results of the study confirmed that task significance was identified as the most preferred job characteristics factor meanwhile feedback was identified as the least preferred job characteristics factor according to the factors that have been defined in Hackman- Oldman job characteristics model.
When comparing two motivational potential score with demographics grouping and number of employees in the company variation patterns were almost similar. Finally the study confirmed that the most effective work motivation factors for IT professionals in Sri l.anka were job characteristic factors rather than their personal needs.
Proactive churn management in Sri Lankan mobile telecommunication industry
No full textChurn is the gross rate of customer loss during a given period. In other words, churn is a measure of the number of subscribers who leave or switch to another carrier's service. The frequent migration of customers is in a way a threat to mobile operators as the expense on % customer acquisition is greater than retention. On the other hand, for any operator it is difficult to maintain a steady growth in the market without maintaining the existing customer. Due to profound competition, controlling churn rate is becoming a challenge to mobile operators and identifying reasons for Churn is an even greater challenge as it is highly dependent on the values, culture, attitudes and perception of the different segments.
As an extension to the literature review, for the research project, a survey was carried out, using a questionnaire, evaluated across various demographic factors (Age, Education level, Monthly income, Gender, etc.), to identify the main causes for retention or churn from one network in Sri Lankan context. The questionnaire was distributed among a selected sample of mobile subscribers and the responses were used for the analysis. Strategies that can be used to minimize churn rate were identified based on the feedback received for the questionnaire and by looking at the best practices available in the region. Finally, a model was developed to prioritize the influencing factors (Tariff, Coverage, Brand, VAS and QoS) to measure the overall customer satisfaction in the Sri Lankan mobile industry context (explained under Discussion of Findings). Also a study was carried out to check whether there is any relationship with demographic factors and influencing factors for churn. Finally, suggestions are provided for Sri Lankan mobile operators to build strategies to minimize churn.
As the conclusions of the research, it can be stated that Sri Lankan subscribers are highly price sensitive and majority of customers who have churned from one network to another is due to lower tariff rates offered by the latter. Further, it can be identified that features for different packages are not being properly directed to a target audience or a segment. Therefore, it is necessary to build new products or packages after cautious analysis of interests of different segments
Simulation of deployable solar sails
No full textConcept of solar sailing which uses solar energy to propel a spacecraft is becoming popular as a low-cost spacecraft propulsion system, especially for high energy-consuming longrange spacecraft. To capture a sufficient amount of energy these solar sails are orders of magnitudes larger in size compared to space available in spacecraft. Moreover, these solar sails, consist of thin folded membranes supported on a backing structure made of self deployable booms. Hence these solar sails along with deployable booms will be subjected to very high compaction to store in launch vehicle for transportation. While thin membrane panels are folded by introducing a series of fold-lines, deployable booms made of thin woven fibre composites are commonly used as a backing structure in these applications. Analogous to thin membrane panels, these booms are subjected to very high compact configurations which induce high stresses and curvatures. Hence, an optimized folding mechanism for solar sails is important to fully function during the deployment without failure. Simulation of deployment behaviour of these solar sails along with booms will facilitate the identification of suitable folding mechanism and optimized designs. In this study, idealisation techniques are presented to simulate accurate solar sail deployment. First, a simulation of a selected repetitive unit cell pattern of Miura-Ori folding was performed to develop an idealization method for the intersected creases in a virtual environment. Also, the effect of membrane thickness on the deployment was studied and verified using a series of experiments. Results illustrate that the connection with rotational stiffness gives better idealisation, and the deployment force and shape have a significant influence from membrane thickness and foldline geometry. Secondly, a simulation of woven fibre composites was performed to capture the nonlinear bending behaviour which is crucial in predicting the accurate behaviour of deployable booms. The numerical model developed can capture accurate moment-curvature response, as observed in experiments, including the non-linear behaviour. This indicates that modelling techniques presented are capable of utilising for simulation of a large-scale solar sail with the backing structure to develop optimised designs.Ministry of Science Technology and Research, Sri Lanka (Indo-Sri Lanka, Research Grant No. MSTR/TRD/AGR/3/02/09) and Senate Research Committee of University of Moratuwa (SRC/TP/2017/09
Dispute avoidance from the perspective of procurement methods : a conceptual focus
No full textDisputes are unavoidable in construction projects due to their complex characteristics and involvement of different parties, which can interrupt the smooth construction process. Hence, proper dispute avoidance strategies need to be implemented to avoid disputes beforehand. On the other hand, the previous researchers suggested that there is a link between disputes and procurement methods. Therefore, the current research investigates the disputes in the construction industry from the perspective of different procurement methods. A systematic literature review was carried out to identify the available procurement methods in the construction industry, disputes and dispute avoidance strategies and the features of the procurement methods from the perspective of disputes. Firstly, a total of fifty-two key research papers on the research area were employed to review. The literature findings revealed that the industry has moved towards collaborative approaches from the traditional procurement method with higher dispute frequency because as per the findings the likelihood of disputes seems less in the projects procured under collaboration. It further revealed that the inherent features of collaborative approach such as teamwork, relationships and mutual understanding give less prosper towards disputes. Therefore, the findings of the review conclude that the selection of collaborative procurement method at the early stages of a project can reduce the possibilities of disputes from the perspective of procurement methods
Dynamic supply chain capability analysis of Hong Kong-Zhuhai-Macao bridge construction: a topic modeling approach
No full textPrefabricated construction as a preferred construction approach instigated significant technological advancements in construction supply chains in Hong Kong (HK). The Hong Kong-Zhuhai-Macao Bridge (HZMB) was a milestone prefabricated construction project which was successfully constructed using these industrial advancements. However, the project itself was a great challenge as it was highly vulnerable to disruptions due to complex supply chain processes. In this regard, increased resilience could be the key to boosting project performance through enhanced Supply Chain Capabilities (SCCs), where identifying SCC dynamics becomes essential. Therefore, this study employed the Topic Over Time Modeling approach to detect critical SCCs using 1,748 unstructured official documents on the HZMB from 2003 to 2018, which spans the period from project design to handover. The popularity trend analysis of texts enabled identifying the six most critical capabilities associated with each construction phase of planning, construction and handover. Thereafter, an ex-post capability evaluation map was developed by considering the popularity trend of capabilities and their relevance to different project phases. Industry practitioners would benefit from prior knowledge of SCCs and their dynamic impact on each project phase to prioritize initiating them adequately and appropriately, targeting value-enhanced-resilient supply chains in ex-ante decision-making of future prefabricated infrastructure development projects. Further, the text-mining research approach unveils to academia, an effective and novel mechanism to extract dynamic empirical clues fro
Development of a scaled vehicle Model for dynamics testing
No full textThe interest in using scaled models for dynamics testing
of prototype vehicles is growing due to the high demand for
autonomous driving. In the early design phases, vehicle testing
is done using computer simulations. Even though computer
simulations are proven to be extremely helpful in designing
prototypes, simulation models need to be validated using realworld
testing. There are high costs involved in vehicle testing
and it’s dangerous to conduct aggressive driving manoeuvres
with real drivers
Investigation on the effect of different channel geometries of thermal wheel for energy transfer efficiency
No full textInside buildings, heating, ventilation, and air conditioning systems are utilized to provide a comfortable environment. However, they account for a significant percentage of overall total energy consumption: in the United States, they account for about 50% of building final energy consumption and 20% of total energy consumption. [1]. The installation of a heat exchanger between the exhaust and fresh air streams is critical, owing to the significant energy savings. [2], [3]. Thermal wheels have recently gotten a lot of attention because of their high efficiency and low-pressure loss when compared to other energy recovery solutions [4]. The goal of this research is to give a comprehensive study and optimization of Thermal wheel design, with the goal of enhancing sensible effectiveness while reducing pressure loss based on channel shape
iGrasp Robotic prosthetic hand
No full texte are living in an era in which technology is shaping the world at an incredible speed. In this wake, the Bionics laboratory of the Department of Mechanical Engineering of the University of Moratuwa is doing inspiring research to improve the quality of life of differently-abled people
A Comparative study of critical success criteria on sustainable housing; a case of - low income housing, Sri Lanka
No full textSustainable housing is a popular topic with regard to the SDG, sustainable communities and Sustainable cities. Although different researches have come up with regard to different CSC of specific contexts there are very limited studies on CSC on Sustainable low-income housing. This research aims to compare the CSC on Sustainable low-income Housing in designing stage in Sri Lankan Context. 18 CSC were derived from comprehensive literature review and re-examined through the 27 professionals and ranked from community on three locations. Relative Importance Index- RII, Min Max Normalization and Gap analyses were employed in the ranking process of Critical Success Criteria. The highest importance has been ranked with Efficiency use of water and energy, Users Satisfaction and Quality of Housing while least importance is ranked with Maintainability, Public Consultation and community participation and cater for Disables and by Literature, Experts and Community respectively. Anyway, Public Consultation and Community Participation, newly derived CSC which is highly ranked among community is to be concentrated among the professionals for the attention and applications in practices. The findings of the research would support to the designers, architectures, planners specialized in this field to ensure the successful delivery of sustainable housing