Research Papers - Department of Mechanical Engineering

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Author: search.filters.author.Perera, H. S. CStart date: 2000

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Now showing 1 - 10 of 25
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    PublicationOpen Access
    A Risk Management Framework for Clouds Using Big Data and Security Informatics usingAttack Trees and Hidden Markov Model in Analysis and Prediction of Risks in Social Media …
    (2014-11) Subasinghe, K. D. B. H; Kodituwakku, S. R; Perera, H. S. C
    Social media refers to the means of interactions among people in which they create, share, and exchange information and ideas in virtual communities and networks. The growth of Information and Communication Technology (ICT) has resulted in an enormous volume of security related information present on the web largely when it comes to social media networks. Therefore, with the changing face of cyber security, although it is difficult, it was found that detecting the potential cyber-attacks or crimes is possible and feasible with the vast improvements in ICT. Cloud computing uses ICT resources that are delivered as a service over a network which has opened a promising opportunity across the globe thus resulting a greater popularity of e-commerce. The proposed framework is developed to manage risks of social media networks using the attack tree method which is used to model the risk of the system and identify the possible attacking strategies which the adversaries may launch. This paper presents the development of a Risk Management Framework by analysis of social media networks through web intelligence and security informatics using attack tree analysis based on the Hidden Markov Model for information extraction and prediction of risk factors of Social Media Networks.
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    PublicationOpen Access
    THE IMPACT OF IMPORTANT CONTEXTUAL FACTORS ON ‘INFORMATION QUALITY’AS A SUPPLY CHAIN MANAGEMENT PRACTICE
    (Faculty of Management Studies and Commerce, University of Sri Jayewardenepura, Sri Lanka, 2012-12-18) Silva, C. W. C; Fernando, M. A. C. S. S; Perera, H. S. C
    Supply Chain Management (SCM) practices have been defined as a set of activities undertaken in an organization to promote effective management of its Supply Chain (SC). The ‘Quality of Information’ exchanged between trading partners is one of such constructs (practices) vital for achieving excellence in organizational management. The objectives of the study are to analyze the impact of important contextual factors on ‘Information Quality (IQ)’ and to recommend the dimensions to be improved for achieving better level of the practice. Data were collected from manufacturing firms of three industries: Apparel, Food and Printing. Industry, Organization Size, SC Length, Channel Structure and Demand Uncertainty were the contextual factors considered. For evaluating IQ, the measurement instrument developed by Suhong Li et al. was used. It defines Timeliness, Accuracy, Completeness, Adequacy and Reliability of information as basic dimensions of IQ. The study discovered that Industry, Size of the firm and Downstream SC structure have significant impacts on IQ.
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    PublicationOpen Access
    Readiness for" Social Learning Management System"(Social LMS) in Sri Lankan Universities: A case study research based on the students' perspectives.
    (International Journal of Advanced Studies in Computers, Science and Engineering, 2018-11-30) Gunawardhana, D. N. T; Perera, H. S. C
    Paper discusses the readiness for the Social Learning Management System in Sri Lankan Universities. The main objective of the study, was to identify the factors to be reconsidered in the existing Learning Management Systems. This is a multiple case study research based on two universities in Sri Lanka. Undergraduate students in the University of Colombo and the University of Moratuwa were included in the population and the sample method employed for the data collection in this research was Stratified Purposive Sampling. Learning Management System has become a support system of vital importance in higher education. Social Learning Management System is formed because of the Collaborative Learning methods in an online learning environment. The findings reveal that the willingness of undergraduate students to work in the social network environment for learning and grouping. The Social Learning Management System is a new concept and it has not yet been initiated in universities in Sri Lanka. The students’ responses have indirectly shown the importance of 'Social LMS'. That is, they have been explaining the features of 'Social LMS' in their responses. They have discussed the functionality of ‘Social LMS’ pointing out the lack of collaborative learning environment of existing LMS. The research has discovered that students already possess the mental and knowledge readiness towards the building of Social Learning Management System in Universities of Sri Lanka.
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    PublicationOpen Access
    Technology Assessment of Herbal Products Industry in Sri Lanka
    (SSRN, 2021-06-29) Silva, N; Perera, H. S. C; Perera, L. C. D.T
    Production of herbal product is not only a local business but also has global market opportunities. Therefore manufacturing with proven quality and consistency is an important aspect. The manufacturers should gain technological competence to ensure authenticity and efficacy, complying the quality and safety regulations, enhanced productivity and efficiency. In the competitive market environment technology assessment is a tool which can be used in projecting future trajectories of technology as well as current performance level of the organization. Out of the available models and frameworks for technological assessments, this study has used inputs from two models namely, the Technology Audit Model by Garcea – Areola and Outline of Innovation Management Audit by Tidd et al. these inputs have been used to develop a single model that can be effectively adaptable to herbal products industry. There are two main objectives of the study. Firstly, develop a model which includes guide lines for technology assessment of the herbal products industry in Sri Lanka. Secondly, assessment of the level of technology position of LNP Ltd using the model and presenting recommendations for future improvements. To accomplish the objectives, the study has identified five broad areas of technology, namely Technological Environment, Technological Strategy, Innovations and Technology Development, Technology Component and Technology Transfer, against which the LNP Ltd has been analyzed. A check sheet to cover these elements has been used to guide through the assessment process. The elements using a three of the point scale ranging from High to Low (High -3, Low-1). The score of 3 for each element will represent the industry standard practice against which the other practices are measured.
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    PublicationOpen Access
    A Case Study of Technology Transfer Process in a Government Research Organization in Sri Lanka
    (Technical Reports. Department of Management of Technology, University of Moratuwa Sri Lanka, 2015) Perera, H. S. C; Darshana, M; Liyanage, C
    The purpose of this paper is to identify and discuss the critical elements of a successful technology transfer process of a research organization by exploring the technology transfer process adopted by a leading government research institute in Sri Lanka. A field study based on a structured questionnaire and personal interviews was carried out to collect data. The study identified several factors that hinder a successful technology transfer as well as several facilitating factors. Findings reveal that contract research projects and funded projects have the greatest probability of commercialization success. It exposed that only 37% of the technologies that had received patents have been successful in the commercialization stage raising concerns about the research productivity. It was also found that the personal approach to technology transfer is dominating but dwindling compared with other approaches. Although the overall technology transfer success is about 86%, commercialization success is well below an acceptable level for this organization. Finally, this paper presents recommendations for an effective technology transfer process which can be applied for similar institutes.
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    PublicationEmbargo
    Knowledge management framework for achieving quality of healthcare in the developing countries
    (IEEE, 2013-01-20) Amararachchi, J. L; Perera, H. S. C; Pulasinghe, K
    A severe dearth of medical experts in health institutions in the rural and remote areas in developing countries has directly affected the quality of healthcare. This problem can be alleviated by providing facilities to access up to date medical Information and knowledge for doctors who are stationed in these areas to update their knowledge. Since Knowledge Management System (KMS) consists of most related Information and knowledge, medical KMSs could be utilized to enhance the quality of clinical activities. This study was aimed to identify the factors that affect the knowledge management initiatives. Findings of the research have shown that there is a strong association between accessing and using Information/ knowledge in clinical activities and the quality of healthcare. Moreover, attitudes of Medical Practitioners (MP), Infrastructure facilities, patient Information systems, patient treatment, staff benefits etc., have contribute positively towards the success of knowledge management in Health organizations. The research has used the case study methodology for accomplishing the research objectives. Remote and rural areas in Sri Lanka have considered for the case study which is one of the developing countries in the Asian region.
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    PublicationOpen Access
    Factors influencing employee motivation in tile manufacturing industry in Sri Lanka
    (2017-01) Jayasuriya, N; Kumarasinghe, W. H; Perera, H. S. C
    This paper presents factors that affect to the level of employee motivation in ceramic tile manufacturing industry in Sri Lanka. The labour productivity in ceramic tile industry in Sri Lanka far lower (7200 Sq.) comparing to other countries. Among the other factors that impact on productivity, employee motivation is considered as direct influencer. Therefore, this research focuses on identifying factors that influencing the employee motivation in ceramic tile manufacturing industry and identifying areas to be improved regarding the employee motivation in the sector. In order to accomplish the objectives proposed, selfadministrative survey questionnaire has been used. Questionnaire was developed in two languages i.e. Sinhala and English. Data have been analysedusing SPSS and sample of 65 respondents. The findings shows pay and benefit as the most important factor in employee motivation while interpersonal relationship and job security as second and third important factors respectively. Then based on the survey findings the researcher presents some recommendations for the industry. In turn this research helps the measurement to formulate suitable policy to motivate the employees.
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    PublicationOpen Access
    A Cost Model for Evaluating Component Standardisation: A Case Study
    (O. P. A, 2000) Nagarur, N. N; Perera, H. S. C; Tabucanon, M. T
    As manufacturing industry tries to grapple the oftenconflicting objectives of increasing product variety and reducing the production costs, one of the strategies oft contemplated is component standardization or using common components. However, developing and using standard components may sometimes push the overall costs actually higher. This paper proposes an evaluation model for decision making in the context of component standardization. First, it discusses various types of costs to be considered for selecting desired components. Then the paper presents a specific case study in which some purchasing parts are considered for standardization. An evaluation model is developed for the relevant costs of the case. The solution and sensitivity analysis are presented and discussed.
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    PublicationOpen Access
    An improved approach to line balancing for garment manufacturing
    (Faculty of Management Studies and Commerce, University of Sri Jayewardenepura, 2016-06-01) Wickramasekara, A. N; Perera, H. S. C
    Production managers in the apparel industry frequently face the issue of being unable to complete the orders at the scheduled time. One of the reasons for this issue is the unavailability of a Line Balancing procedure that could encompass the stochastic nature of the sewing process, which is manifested through the likes of variability of sewing times, machine breakdowns, correcting defective products, and operator breakings such as for changing bobbins and drinking water. The objective of this research is to introduce a diverse approach to Line Balancing through giving due consideration to the stochastic nature of the process. The improved approach was developed through case study approach. Having selected a sewing line in an apparel factory, the process times of operations, major random events and the times elapsed between random events were recorded. Then the whole production cycle was simulated using ARENA software. By attempting and analysing different scenarios, a different approach for line balancing was introduced. The initial steps of the algorithm developed includes: collecting processing times and necessary information on manufacturing process, fitting standard probability distributions to both value added and non-value added activities, developing the precedence diagram, developing an initial algorithm for balancing a production line and finally, making necessary adjustments to the algorithm analyzing different scenarios. In order to check the validity of the algorithm, a production line was balanced for two different daily production targets. Thus, the application of proposed algorithm to balance the production line reduces the gap between the expected production target and the real achievement.
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    PublicationOpen Access
    Framework to identify the affecting factors of electronic service quality of Information Systems of a university: A CONCEPTUAL MODEL
    (International Journal of Advanced Studies in Computers, Science and Engineering, 2015-10-01) Gunawardhana, D. N. T; Perera, H. S. C
    Electronic media usage is very high in every field with technological innovation. Universities and higher education institutions also use electronic media to see the most effective results on behalf of inputs. Although information and knowledge are separate concepts, they join together to work like a combined socket and the electronic media is the key gear in a given academic environment. Latest technologies have reached the university systems at a higher priority level. From that point, usage of electronic information system has become an essential discussion in the field of education. Many a research have been done in the field of IS and have created an awareness in the direction of service quality of IS in the education environment. Identifying the factors that affect the information system service quality is important to take necessary decisions of IS. This effect was to introduce a framework to identify the affecting factors of IS service quality in a university environment. Introduced framework has principally based on the E-S-Qual model and it has moderated according to literature in this field with findings of the researcher.