Browsing UoM Conferences by Year "2008"

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  • Correlation between ultrasonic attenuation and hardness of tool steels 
    Dayananda, HGSM; Munasinghe, RGNDS; Sivahar, V [Conference-Abstract]
    Theory of propagation and reflection of ultrasonic waves in metals in used to locate the internal defects of engineering components. It is observed that the energy absorption of ultrasonic waves (attenuation) in a metal ...
  • Design and fabrication of a spiral classifier for off-shore sand washing 
    Udawatte, NBB; Siriwardene, HP; Samaratunga, SPND; Udayanga, WAC; Rupasinghe, SN; Theeparuban, B; Fernando, WLW [Conference-Full-text]
    The rapid growth of construction industry has created a significant demand for sand. Consequently, it has increased the exploitation rate of river sand giving rise to adverse environmental impacts. Therefore, the tendency ...
  • Design and fabrication of hydrocyclones using Krebs mathematical model 
    Hettiarachchi, RNDS; Liyanaarachchi, KR; Lokubalasooriya, LBAM; Merza, AAMIMA; Thinesh, S; Femando, WLW [Conference-Full-text]
    Hydrocyclone is one of the most important devices used in mineral processing industry. It is a continuously operating classifying device that utilizes centrifugal, gravitational and inertial forces to classify particles. ...
  • Design and realization of pogrammable induction motor drive 
    Kurnarawadu, S; Ranindu, D; Rathnayakae, G; Sreeskanth, V; Sriragu, A; Sudarsan, Gl [Conference-Abstract]
    There are different algorithms available for speed control of induction motors, while every algorithm has its relative merits over the other. The inverters available in the market are mostly designed using application ...
  • Design of an ergonomically efficient chair 
    Gopura, RARC; Amarasena, KGAH [Conference-Abstract]
    Ergonomically designed chairs are important for long time seated workers to increase their productivity and also to reduce low back injuries due to use of poorly designed chairs in ergonomic aspects. In addition, ...
  • Design of automatic voltage regulator and frequency governor for synchronous generator 
    Karunadasa, JP; Kumara, GRME; Paranietharan, A; Vishnukanth, S; Gamachchige, MSW [Conference-Abstract]
    This paper presents the development of an Automatic Voltage Regulator (AVR) and a Frequency Governor for synchronous generator for laboratory purposes. The AVR operates as a voltage stabilizer and controller because the ...
  • Design, fabrication and testing of a thermo-electric refrigeration unit 
    Fernando, SVA; Wijesekara, RGRP; Wijewardane, MA; Watugala, GK; Attalage, RA [Conference-Abstract]
    A Thermo-Electric Refrigeration Unit to be used as a portable vaccine cooler in rural areas, where the main grid supply is unavailable was designed and constructed. Thermo-Electric modules working on the Peltier Effect, ...
  • Designing an underground ventilation system and fan selection 
    Widisinghe, SD; Silva, WJMPGS; Jayakody, JASP; Konsal, J; Rasika, WGP; WeIideniya, HS; Ekanayake, K [Conference-Full-text]
    Mixing of stale air with fresh air (short-circuiting of airflows) is a critical issue in any underground ventilation system. This study was done at Bogala mines owned by Bogala Graphite Lanka Ltd, where this type of ...
  • Developing a food nano-bio technology roadmap for Sri Lanka 
    Perera, DHN; De Alwis, AAP; Ranaweera, KKDS [Conference-Abstract]
    Nanotechnology, the next revolution in the 21" century has many applications in several fields. Sri Lanka as a country based on the agricultural economy can benefit from this technology by enhancing the quality, safety and ...
  • Developing generalised human machine interface (HMI) devices for PLC controlled automation systemss 
    Ijabathullah, IIAAI; Dassanayake, VPC; Chandrarathne, LMLR; Madurapperuma, SN; Somapala, PM [Conference-Abstract]
    HMJ Devices provide logical flexibility to an industrial automation system by human feedback and decision support. Limitations on the present-day's HMIs, their brand and model specific interoperability limitations, lack ...
  • Development of a methodology for selection of industrial grade-a quarry site for coarser and finer aggregates 
    Maduranga, HGS; Sinthuja, S; Soundararajan, P; Kumara, MHCM; Amadoru, T; Wimal, MD; Abeysinghe, AMKB [Conference-Full-text]
    Recent history has revealed that the identification of prospective mineral resources is essential to sustain mineral based industry to full fill the demand required in future. Aggregate industry also has the same risk ...
  • Development of breathing monolayer plastic packaging 
    Gunapala, O; Gunapala, PY; Illangarathne, SSKP [Conference-Abstract]
    The importance and relevance of development of permeable polymeric materials become apparent due to accelerating demand on breathing packaging in food processing, pharmaceutical, and horticultural industries. The present ...
  • Effect of Papain on the biodegradability of polyethylene modified by Chitosan 
    Samarasekara, AMPB; Gunapala, PY [Conference-Abstract]
    The objective of this research was to impart biodegradability to polyethylene. Chitin and Chitosan were main additives extracted from the fishery waste. Chitosan, a natural polymer, was one prospective contender for ...
  • Effect of size of the inlet for the air flow through the new multi dose dry powder Inhaler 
    Sudeera, MADA; Dassanayake, VPC; Mangala, J; Goonathilake, A [Conference-Abstract]
    This paper was based on part of the study in developing a new multi dose dry powder inhaler. This was focused on to study how the inlet diameter of the inhalation air chamber of a new multi dose dry powder inhaler affects ...
  • Electronically controlled circuit breaker 
    Karunadasa, JP; Edirisinghe, AJ; Hasthanayake, LS; Ranawaka, AS; Shantha, GDI; Suranjith, ALD [Conference-Abstract]
    Due to rapid increase of 3 phase motors the usage of MCCBs, contactors and overloads have also increased. The main objective of project is to design and implement a low cost Electronically Controlled Circuit Breaker (ECCB) ...
  • Exploring new opportunities - the application of ULTRASONIC Technology in fashion 
    Seram, NCK [Conference-Abstract]
    The development of new technologies applied to fashion offer opportunities to adapt the multiple and ever changing lifestyles redefining how we think about the design, manufacture and consumption of fashion. In fashion ...
  • Extraction of natural dyes as textile colourants from kitchen wastes 
    Wijayapala, UGS [Conference-Abstract]
    This research study focuses on the dyeing of cellulosic fabrics with aqueous extracts from two different domestic wastes. Two methods of dyeing (i.e. with mordanting and without mordanting) were carried out on cotton ...
  • Extraction, isolation & identification of colouring substances in local natural dye yielding plants 
    Abeysinge, W; Suraweera, P; Kurnaratunge, S; Wijayapala, UGS [Conference-Abstract]
    This paper is based on the extraction, isolation and identification of yellow dye pigments present in jak saw dust (Artocarpus heterophyl/us) by solvent extraction method. Six natural dye yielding plants were selected ...
  • Feasibility studies of a constructed wetland to treat contaminated water 
    Weerasooriya, UK; Dilrukshi, RAN; Adikari, AMHW; Rajeeth, A; Achchuthan, P; Karunarathne, S [Conference-Full-text]
    Among the vast number of methods that can be applied for the treatment of contaminated water, mine water was identified one of the best methods of treating of abandoned as the subsurface flow constructed wetlands ...
  • Flow Behavior Of Mineral Particles Through Silos 
    Rohitha, LPS; Dissanayaka, DMDOK; Fernando, WLW [Conference-Abstract]
    Flow behavior of dry minerals in silos has been investigated initially with glass funnels with different orifices. Thereafter, funnel was scaled up to a pilot plant (Silo) with adjustable orifices at its discharge end. The ...