Open University of Sri Lanka

Nugegoda, Sri Lanka

Open University of Sri Lanka

Nugegoda, Sri Lanka
Time filter
Source Type

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.

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.

Samaranayake H.M.S.,South Tourism | Lantra N.,Open University of Sri Lanka | Jayawardena C.,Consulting Inc.
Worldwide Hospitality and Tourism Themes | Year: 2013

Purpose: This paper aims to provide a backdrop for the Worldwide Hospitality and Tourism Themes (WHATT) theme issue on tourism in Sri Lanka. Design/methodology/approach: This paper is written in the context of a strategic question: "how might post-war Sri Lanka develop inbound tourism?" A narrative approach is taken to cover a period of 46 years. Findings: 26 years of war affected tourism in Sri Lanka resulting in low demand, low prices and a reputation as a cheap destination. Turnaround came when the war ended in 2009. In 2012 Sri Lanka passed two milestones in its tourism history by emerging as a "million tourist destination" and a "billion dollar export income earner". Sri Lanka is now aiming to attract 2.5 million tourists by 2016. Practical implications: Tourism in Sri Lanka has the potential to emerge as a major export income earner. To further develop tourism, Sri Lanka must develop a long-term tourism master plan with inputs from all stake holders. Authors suggest that such a master plan is needed to achieve a target of 4.5 million tourist arrivals by 2024. Originality/value: This paper learns from the past and plans for the future. A former Chairman and a former Director of the national tourism authority of Sri Lanka joined hands with an international hospitality and tourism educator to co-write this paper to advocate for a holistic plan in further development of tourism in Sri Lanka. © Emerald Group Publishing Limited.

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.

Punchimudiyanse M.,Open University of Sri Lanka | Meegama R.G.N.,University of Sri Jayewardenepura
2015 IEEE 10th International Conference on Industrial and Information Systems, ICIIS 2015 - Conference Proceedings | Year: 2015

An automated speech recognizer (ASR) having a large vocabulary is yet to be developed for the Sinhala language because of the time consumed in gathering the training data to build a language model. The dictionary and building the language model require non-English text, in our case, Sinhala Unicode, to be transcribed in phonetic English text. Unlike text to speech conversions which only require transcribing the non-English text to phonetic English text, an ASR needs correct reproduction of the original language text when the phonetic English text is produced as the output of the speech recognizer. In the present research, newspaper articles are used to gather a large set of sentences to build a language model having thousands of words for the Sphinx ASR. We present a decoder algorithm that produces phonetic English text from Sinhala Unicode text and an encoder algorithm that produces the correct reproduction of Unicode Sinhala text from phonetic English. For a near phonetic tag set for Sinhala alphabet, results indicate 100% accuracy for the decoder algorithm while for numberless text, accuracy of the encoder algorithm stands at 98.61% for distinct phonetic English words. © 2015 IEEE.

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.

De Silva S.,University of Pennsylvania | De Silva S.,Uda Walawe Elephant Research Project | Ranjeewa A.D.G.,Uda Walawe Elephant Research Project | Ranjeewa A.D.G.,Open University of Sri Lanka | Kryazhimskiy S.,Harvard University
BMC Ecology | Year: 2011

Background: Patterns in the association of individuals can shed light on the underlying conditions and processes that shape societies. Here we characterize patterns of association in a population of wild Asian Elephants at Uda Walawe National Park in Sri Lanka. We observed 286 individually-identified adult female elephants over 20 months and examined their social dynamics at three levels of organization: pairs of individuals (dyads), small sets of direct companions (ego-networks), and the population level (complete networks).Results: Corroborating previous studies of this and other Asian elephant populations, we find that the sizes of elephant groups observed in the field on any particular day are typically small and that rates of association are low. In contrast to earlier studies, our longitudinal observations reveal that individuals form larger social units that can be remarkably stable across years while associations among such units change across seasons. Association rates tend to peak in dry seasons as opposed to wet seasons, with some cyclicity at the level of dyads. In addition, we find that individuals vary substantially in their fidelity to companions. At the ego-network level, we find that despite these fluctuations, individuals associate with a pool of long-term companions. At the population level, social networks do not exhibit any clear seasonal structure or hierarchical stratification. © 2011 de Silva et al; licensee BioMed Central Ltd.

Meedin G.S.N.,Open University of Sri Lanka | Perera I.,University of Moratuwa
MobiSys 2016 Companion - Companion Publication of the 14th Annual International Conference on Mobile Systems, Applications, and Services | Year: 2016

In order to be useful any kind of product or an application need to be designed by considering the user preferences and the context of use. The process of designing software based on user experience (UX) is often known as user experience design. Crowdsourcing is a widely known term used to describe the process of getting work done online from a crowd of people. Our research focuses on how crowdsourcing can be used in evaluating the user experience of mobile application users. First phase of the research was carried out developing an intelligent system to generate a UX questionnaire [1] as an alternative to the conventional manual interview process. This questionnaire is used to capture the user profile, user, product, social, cultural factors and the context of use to be used to generate personas. This paper gives an introduction to the design of the conceptual framework and the platform we provide for UI designers to evaluate user experience based on that framework. © 2016 Copyright held by the owner/author(s).

Loading Open University of Sri Lanka collaborators
Loading Open University of Sri Lanka collaborators