Open University of Sri Lanka

Nugegoda, Sri Lanka

Open University of Sri Lanka

Nugegoda, Sri Lanka
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Perera S.,Open University of Sri Lanka | Balasuriya N.,Open University of Sri Lanka
16th International Conference on Advances in ICT for Emerging Regions, ICTer 2016 - Conference Proceedings | Year: 2016

Visually impaired community rely on many artificial AIDS which allow them to lead an average life in the complex modern society. Identification of currency notes is of utmost importance in this regard and many electronic currency note recognizers have been developed. Nevertheless, a compact, accurate and a cost effective recognizer optimized for local currency notes is highly preferred. In this paper we present the design of a less complex recognizer based on colour detection, thus avoids the expensive and bulky hardware. The test results demonstrate the designed note identifier to be performing in par with the existing similar products while it is capable of being used as a very handy handheld device. © 2016 IEEE.

Ariyasingha I.D.I.D.,Open University of Sri Lanka | Fernando T.G.I.,University of Sri Jayewardenepura
2016 IEEE International Conference on Information and Automation for Sustainability: Interoperable Sustainable Smart Systems for Next Generation, ICIAfS 2016 | Year: 2017

Ant colony optimization is a meta-heuristic that has been widely used for solving combinatorial optimization problems, and most real-world applications are concerned with multi-objective optimization problems. The Pareto strength ant colony optimization (PSACO) algorithm, which uses the concepts of Pareto optimality and also the domination concept, has been shown to be very effective in optimizing any number of objectives simultaneously. This paper modifies the PSACO algorithm to solve two combinatorial optimization problems: The travelling salesman problem (TSP); and the job-shop scheduling problem (JSSP). It uses the random-weight based method as an improvement. The proposed method achieved a better performance than the original PSACO algorithm for both combinatorial optimization problems and obtained well-distributed Pareto-optimal fronts. © 2016 IEEE.

Madhusanka B.G.D.A.,Open University of Sri Lanka | Jayasekara A.G.B.P.,Open University of Sri Lanka
2016 IEEE International Conference on Information and Automation for Sustainability: Interoperable Sustainable Smart Systems for Next Generation, ICIAfS 2016 | Year: 2017

Using eyes as an input device for different control backgrounds is the great research area of concern for enhancing the wide scope of human robot interaction. Interface design requirements in like that implementations are relatively different rather than conventional application areas. Both desired command input and sensory feedback responses may be achieved by human eyes instantaneously. In the direction of control the motion of a robot eye by operator gaze interaction, gaze dependent regions in the operator interface are used to perform robot eye movement commands, with different display areas controlling specific directions. The proposed method is developed of adaptive vision attentive robot eye for a service robot and methodical approach has been followed to the design and develop an interactive robotic eye. The process includes the mechanical and electrical designs, in the design process close attention has been paid to the human bio-mechanics to realize a design that reaches anthropomorphism to a closer degree. © 2016 IEEE.

Premarathne U.S.,RMIT University | Premarathne U.S.,Open University of Sri Lanka
2017 14th IEEE Annual Consumer Communications and Networking Conference, CCNC 2017 | Year: 2017

Reliable federation identity management and efficient user authentication using single-sign-on (SSO) are desirable aspects of InterCloud to achieve inter-operable security objectives. Trust is an important aspect which enhances reliability of federated identity management. Existing service provider-initiated or identity-provider initiated identity sharing models for SSO does not analyse the reliability of the trust based inter-relationships. In this paper we describe a model to analyse the reliability of existing trust based inter-relationships of federated identity management models in InterCloud using graph coloring. The analyses shows that reliability of federated identity management with SSO can be enhanced with strong trustworthy inter-relationships and in addition the reliability depends on the InterCloud deployment architecture. © 2017 IEEE.

Milinda H.G.T.,Open University of Sri Lanka | Madhusanka B.G.D.A.,Open University of Sri Lanka
3rd International Moratuwa Engineering Research Conference, MERCon 2017 | Year: 2017

Floor cleaning robot has gained popularity in the European country. When people are busy with their work, the robot is to take over house cleaning task. Most of the service robot technologies become more and more matured so that applications far beyond fetch and carry tasks will be possible in near future. Most of the robot perform one task at the time. To be of any use, cleaning robots should be able to monitor the outcome of their work, or the need to remove dirt at the beginning for point-wise cleaning. This paper presents an approach towards the detection of various dirt on textured surfaces using a Camera image. The algorithm aims at removing the regular part of the image with spectral residual filtering leaving only the dirt and some noise and introduced a novel method to identify mud on the floor. With further post-processing, it is possible to localize many kinds of dirt in the image. © 2017 IEEE.

Wijayaratne A.L.,Open University of Sri Lanka | Singh D.,University of Malaya
Electronic Library | Year: 2015

Purpose - The purpose of this paper is to introduce a library website model. Further, the paper discusses a designer's checklist and an evaluative instrument that were constructed based on the proposed model. Design/methodology/approach - The model was developed through a Delphi study that was participated by two panels of experts. The researcher communicated with the panel members via e-mail using two Delphi instruments designed out of two item pools that were developed based on the knowledge gained from surveying the literature, visiting the selected libraries and exploring the library websites. Then, a designers checklist and an evaluative instrument were derived from the proposed model through a series of brainstorming sessions. Findings - The proposed model consisted of altogether 140 items (60 web content elements and 80 web design features). The designers checklist comprises all 140 items, and the evaluative instrument comprises 60 content elements and 57 design features. Research limitations/implications - This study has developed an academic library website model and derived two instruments based on the proposed model. Further studies are needed to customize, particularly, the web content pillar of this conceptual model, to meet the specific needs of different types of libraries including public libraries, special libraries, school libraries, etc. Practical implications - The designers checklist and the evaluative instrument derived from the proposed modelare useful tools for library professionals in designing, re-designing, maintainingandevaluating their library websites. The librarians may use these tools for both institutional and research purposes. Originality/value - The model and the two instruments proposed by this study are unique in focus, origin, content and presentation. © Emerald Group Publishing Limited.

Herath C.N.,Open University of Sri Lanka
Fibers and Polymers | Year: 2013

In this research work, air permeability variations of core spun cotton/spandex single jersey and 1×1 rib knitted structures were studied under relaxation treatments. Results are compared with similar fabrics made from 100 % cotton material. Even though cotton/spandex fabrics knitted with same stitch lengths, their structural spacing and stitch densities vary with the progression of treatments. Similar behavior was also observed with 100 % cotton knitted structures. Under higher machine set stitch lengths (i.e., lower fabric tightness factor), higher structural spacing and lower stitch densities were resulted and those variations significantly affected on the air permeability variations of knitted structures. 1×1 rib knitted structures showed significantly higher air permeability than single jersey structures and it is more prominent with cotton rib structures. However, cotton/spandex 1×1 rib and single jersey structures have not showed such significant deviations. Air permeability of cotton/spandex and 100 % cotton rib and single jersey knitted structures decreased with lower machine set stitch lengths (i.e., at higher fabric tightness factors). There was a correlation with fabric tightness, air permeability, areal density and fabric thickness such as knitted fabrics became tighter, their weight and thickness were higher, while their air permeability was lower. Thus, fabric areal density and fabric thickness are positively correlates to machine set stitch length-1 (fabric tightness factor). Air permeability of a knitted structure depends on material type, knitted structure, stitch length, relaxation treatment, structural spacing and stitch density. © 2013 The Korean Fiber Society and Springer Science+Business Media Dordrecht.

Ariyasingha I.D.I.D.,Open University of Sri Lanka | Fernando T.G.I.,University of Sri Jayewardenepura
Swarm and Evolutionary Computation | Year: 2015

Most real world combinatorial optimization problems are difficult to solve with multiple objectives which have to be optimized simultaneously. Over the last few years, researches have been proposed several ant colony optimization algorithms to solve multiple objectives. The aim of this paper is to review the recently proposed multi-objective ant colony optimization (MOACO) algorithms and compare their performances on two, three and four objectives with different numbers of ants and numbers of iterations. Moreover, a detailed analysis is performed for these MOACO algorithms by applying them on several multi-objective benchmark instances of the traveling salesman problem. The results of the analysis have shown that most of the considered MOACO algorithms obtained better performances for more than two objectives and their performance depends slightly on the number of objectives, number of iterations and number of ants used. © 2015 Elsevier B.V.

Martin C.J.,Trinity College Dublin | Gil B.,Trinity College Dublin | Perera S.D.,Trinity College Dublin | Perera S.D.,Open University of Sri Lanka | Draper S.M.,Trinity College Dublin
Chemical Communications | Year: 2011

With a view to combining the desirable electronic and photochemical properties of hexabenzocoronene (HBC) and the C-C bond forming capabilities of thiophenes, 1-(3-thienyl)-2,3,4,5,6-penta(4-tert-butyl-phenyl)benzene (1) was oxidised using FeCl 3. The resulting products, superaromatic thiophene (2) and its 5,5′-dimer (3), are S-HBC systems and provide a new pair of spectral comparators. © 2011 The Royal Society of Chemistry.

Balasuriya N.,Open University of Sri Lanka
2015 10th Asia-Pacific Symposium on Information and Telecommunication Technologies, APSITT 2015 | Year: 2015

Wireless sensor networks are very much concerned on conserving power and error control coding is a considerable burden on this power conservation. Thus, this paper proposes a diversity based routing algorithm to achieve the reliability in the absence of error control coding. Two diversity combining techniques are also proposed. The simulation results demonstrate that the proposed routing algorithm achieves the reliability that of many simple linear block codes while outperforming some. Moreover, the low complexity due to the absence of error control circuitry, reduces power consumption greatly. © 2015 IEICE.

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