Pub Date : 2016-04-05DOI: 10.1109/MERCON.2016.7480164
S. de Silva, V. Sivahar
This paper presents results of the study of ultrasonic pulse velocity and compressive strength of ordinary Portland cement mortar. Objectives of this study are to determine correlations between ultrasonic pulse velocity and compressive strength of cement mortar and to predict strength of cement mortar at 28 days within 02 days using ultrasonic pulse velocity of cement mortar. Water/cement ratio, sand content, method of specimen preparation, curing media and curing temperature were kept constant throughout the experiment. Portable Ultrasonic Nondestructive Digital Indicating Tester with transducers of 54 kHz frequency was used to measure ultrasonic pulse velocity.
{"title":"Non-destructive evaluation of strength gain of ordinary portland cement mortar by ultrasonic pulse velocity method","authors":"S. de Silva, V. Sivahar","doi":"10.1109/MERCON.2016.7480164","DOIUrl":"https://doi.org/10.1109/MERCON.2016.7480164","url":null,"abstract":"This paper presents results of the study of ultrasonic pulse velocity and compressive strength of ordinary Portland cement mortar. Objectives of this study are to determine correlations between ultrasonic pulse velocity and compressive strength of cement mortar and to predict strength of cement mortar at 28 days within 02 days using ultrasonic pulse velocity of cement mortar. Water/cement ratio, sand content, method of specimen preparation, curing media and curing temperature were kept constant throughout the experiment. Portable Ultrasonic Nondestructive Digital Indicating Tester with transducers of 54 kHz frequency was used to measure ultrasonic pulse velocity.","PeriodicalId":184790,"journal":{"name":"2016 Moratuwa Engineering Research Conference (MERCon)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130991014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-05DOI: 10.1109/MERCON.2016.7480151
A. Suja, R. Halwatura
Mud blocks are one of the oldest and most widely used building materials and dates back to 8000 Before Christ. The development of a new type of soil cement block called Mud block with 10% cement with low fine content using pouring method is the main purpose of this research. 10% and 15% of fine content were defined as the low fine content in this research as it was a part of the continuous research series. Initially the optimum gravel and sand content to achieve high strength was determined and it was concluded that 30% of gravel content was the optimum for both fine content. Then the moisture content corresponding to the pouring stage of soil mixture consists of optimum gravel, sand and 10% and 15% of fine content was found and the values were an average of 18% and 20% respectively. Pouring stage was found when the soli mixture behaves as high consistency liquid. Six blocks were cast each fine content; three blocks were used to determine the dry compressive strength and other three were used to determine the wet compressive strength. Length, width and height of one block were 325mm, 200mm and 125mm respectively and weight was about 15kg. Dry and wet compressive strength achieved satisfies the minimum strength requirement of block used for the construction of load bearing wall according to the SLS 1382. Therefore these blocks can be used in load bearing wall construction. The strength achieved is fairly high than the minimum requirements. So for the future study of Mud blocks, it is recommended to reduce the cement content for casting the Mud blocks.
{"title":"Developing a Mud block for load bearing wall with 10% cement and low fines content","authors":"A. Suja, R. Halwatura","doi":"10.1109/MERCON.2016.7480151","DOIUrl":"https://doi.org/10.1109/MERCON.2016.7480151","url":null,"abstract":"Mud blocks are one of the oldest and most widely used building materials and dates back to 8000 Before Christ. The development of a new type of soil cement block called Mud block with 10% cement with low fine content using pouring method is the main purpose of this research. 10% and 15% of fine content were defined as the low fine content in this research as it was a part of the continuous research series. Initially the optimum gravel and sand content to achieve high strength was determined and it was concluded that 30% of gravel content was the optimum for both fine content. Then the moisture content corresponding to the pouring stage of soil mixture consists of optimum gravel, sand and 10% and 15% of fine content was found and the values were an average of 18% and 20% respectively. Pouring stage was found when the soli mixture behaves as high consistency liquid. Six blocks were cast each fine content; three blocks were used to determine the dry compressive strength and other three were used to determine the wet compressive strength. Length, width and height of one block were 325mm, 200mm and 125mm respectively and weight was about 15kg. Dry and wet compressive strength achieved satisfies the minimum strength requirement of block used for the construction of load bearing wall according to the SLS 1382. Therefore these blocks can be used in load bearing wall construction. The strength achieved is fairly high than the minimum requirements. So for the future study of Mud blocks, it is recommended to reduce the cement content for casting the Mud blocks.","PeriodicalId":184790,"journal":{"name":"2016 Moratuwa Engineering Research Conference (MERCon)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126219084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-05DOI: 10.1109/MERCON.2016.7480156
S. N. S. Hapuarachchi, S. R. Kariyapper, M. Gunawardana, S. Egodage, T. Ariyadasa
A natural rubber degrading bacteria Paenibacillus lautus was isolated from soil samples of a rubber plantation in Sri Lanka. The strain was able to decompose natural rubber latex by adhesively growing on its surface using NR latex as the sole carbon source. The staining test performed using Schiff's reagent confirmed the degradation of NR latex. The Fourier Transform Infrared Spectroscopy further verified the result by showing the reduction of C=C double bonds and the presence of carboxylic acids and ketones in the polymer chain. The surface erosion images of the latex overlay surfaces obtained from scanning electron microscopy also validated the degradation process.
{"title":"Biodegradation of natural rubber latex by a novel bacterial species isolated from soil","authors":"S. N. S. Hapuarachchi, S. R. Kariyapper, M. Gunawardana, S. Egodage, T. Ariyadasa","doi":"10.1109/MERCON.2016.7480156","DOIUrl":"https://doi.org/10.1109/MERCON.2016.7480156","url":null,"abstract":"A natural rubber degrading bacteria Paenibacillus lautus was isolated from soil samples of a rubber plantation in Sri Lanka. The strain was able to decompose natural rubber latex by adhesively growing on its surface using NR latex as the sole carbon source. The staining test performed using Schiff's reagent confirmed the degradation of NR latex. The Fourier Transform Infrared Spectroscopy further verified the result by showing the reduction of C=C double bonds and the presence of carboxylic acids and ketones in the polymer chain. The surface erosion images of the latex overlay surfaces obtained from scanning electron microscopy also validated the degradation process.","PeriodicalId":184790,"journal":{"name":"2016 Moratuwa Engineering Research Conference (MERCon)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117198845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-05DOI: 10.1109/MERCON.2016.7480158
S. T. Rakkesh, A. Weerasinghe, R. Ranasinghe
Multi-modal transportation planning refers to traffic analysis that considers various modes of transportation mechanisms such as walking, cycling, motorcycles, private passenger vehicles, delivery cargo vehicles, public transportation modes like buses or trains, etc. Effective city traffic planning has become a challenging task involving complex behavioral analysis of multi-modal traffic scenarios. New ventures of research solutions and effective multi-modal traffic strategies should be explored to mitigate ever-rising issues related to traffic congestion. Before new solutions are to be deployed on real traffic environments, it requires recurring experiments to be carried out and comprehensive testing cycles to be passed through. Hence, simulators play a crucial supporting role by emulating real environments during trials. In this paper, we investigate interdependencies and effects between different transportation modes by simulating pedestrian movements, different private transport modes and public transport avenues and propose an effective transport planning strategy using multi-modal simulation approach. We have selected Colombo city in Sri Lanka as our study region and used SUMO (Simulation of Urban MObility), a well-known microscopic traffic simulator for simulations. Our experiment results show that there are supporting strong evidences exist that interdependencies between multi-modal transportation modes contribute significantly to effective urban traffic planning.
多式联运规划是指考虑多种交通方式的交通分析，如步行、骑自行车、摩托车、私人客运车辆、货运车辆、公共交通方式如公共汽车或火车等。有效的城市交通规划已成为一项具有挑战性的任务，涉及复杂的多模式交通情景行为分析。应探索新的研究解决方案和有效的多模式交通战略，以缓解日益严重的交通拥堵问题。新的解决方案在实际交通环境中部署之前，需要反复进行实验，并经过全面的测试周期。因此，模拟器在试验过程中通过模拟真实环境发挥了至关重要的支持作用。本文通过模拟行人运动、不同的私人交通方式和公共交通途径，研究了不同交通方式之间的相互依赖关系和影响，并利用多模式模拟方法提出了有效的交通规划策略。我们选择斯里兰卡的科伦坡市作为我们的研究区域，使用著名的微观交通模拟器SUMO (Simulation of Urban MObility)进行模拟。实验结果表明，多式联运模式之间的相互依赖关系有助于有效的城市交通规划。
{"title":"Effective urban transport planning using multi-modal traffic simulations approach","authors":"S. T. Rakkesh, A. Weerasinghe, R. Ranasinghe","doi":"10.1109/MERCON.2016.7480158","DOIUrl":"https://doi.org/10.1109/MERCON.2016.7480158","url":null,"abstract":"Multi-modal transportation planning refers to traffic analysis that considers various modes of transportation mechanisms such as walking, cycling, motorcycles, private passenger vehicles, delivery cargo vehicles, public transportation modes like buses or trains, etc. Effective city traffic planning has become a challenging task involving complex behavioral analysis of multi-modal traffic scenarios. New ventures of research solutions and effective multi-modal traffic strategies should be explored to mitigate ever-rising issues related to traffic congestion. Before new solutions are to be deployed on real traffic environments, it requires recurring experiments to be carried out and comprehensive testing cycles to be passed through. Hence, simulators play a crucial supporting role by emulating real environments during trials. In this paper, we investigate interdependencies and effects between different transportation modes by simulating pedestrian movements, different private transport modes and public transport avenues and propose an effective transport planning strategy using multi-modal simulation approach. We have selected Colombo city in Sri Lanka as our study region and used SUMO (Simulation of Urban MObility), a well-known microscopic traffic simulator for simulations. Our experiment results show that there are supporting strong evidences exist that interdependencies between multi-modal transportation modes contribute significantly to effective urban traffic planning.","PeriodicalId":184790,"journal":{"name":"2016 Moratuwa Engineering Research Conference (MERCon)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123120332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-05DOI: 10.1109/MERCON.2016.7480110
R. Panchendrarajan, B. Murugaiah, S. Prakhash, M. N. Nazick Ahamed, Surangika Ranathunga, A. Pemasiri
In aspect-level opinion mining, each aspect is assigned a rating based on customer reviews. More often than not, these aspects exhibit a hierarchical relationship, and the restaurant domain is no difference. With the existence of such hierarchical relationships, rating of an aspect is based on the composite score of its sub-elements. However, the influence of these sub-aspects on the score of a parent aspect is not uniform, since some sub-aspects are perceived more important than others. Therefore, when calculating the composite score for an aspect, influence of each sub-aspect should be weighted according to its perceived importance. Identifying weights for different aspects is addressed as the problem of multi-attribute weighting. However the existing approaches do not utilize the relationships between aspects to find weights. This paper presents an approach to find weights for aspects that exhibit hierarchical relationships in restaurant domain using an improved version of the Analytic Hierarchy Process (AHP), one of the Multi Attribute Decision Making Techniques (MADTs). Different aspects of the restaurant domain are modeled as a hierarchy and weights for aspects are calculated using AHP. Occurrence counts of aspects in restaurant reviews are used to obtain the relative importance of aspects. This approach provides acceptable consistency ratios for the pairwise comparison matrices obtained for each level in the hierarchy of aspects.
{"title":"Cheap food or friendly staff? Weighting hierarchical aspects in the restaurant domain","authors":"R. Panchendrarajan, B. Murugaiah, S. Prakhash, M. N. Nazick Ahamed, Surangika Ranathunga, A. Pemasiri","doi":"10.1109/MERCON.2016.7480110","DOIUrl":"https://doi.org/10.1109/MERCON.2016.7480110","url":null,"abstract":"In aspect-level opinion mining, each aspect is assigned a rating based on customer reviews. More often than not, these aspects exhibit a hierarchical relationship, and the restaurant domain is no difference. With the existence of such hierarchical relationships, rating of an aspect is based on the composite score of its sub-elements. However, the influence of these sub-aspects on the score of a parent aspect is not uniform, since some sub-aspects are perceived more important than others. Therefore, when calculating the composite score for an aspect, influence of each sub-aspect should be weighted according to its perceived importance. Identifying weights for different aspects is addressed as the problem of multi-attribute weighting. However the existing approaches do not utilize the relationships between aspects to find weights. This paper presents an approach to find weights for aspects that exhibit hierarchical relationships in restaurant domain using an improved version of the Analytic Hierarchy Process (AHP), one of the Multi Attribute Decision Making Techniques (MADTs). Different aspects of the restaurant domain are modeled as a hierarchy and weights for aspects are calculated using AHP. Occurrence counts of aspects in restaurant reviews are used to obtain the relative importance of aspects. This approach provides acceptable consistency ratios for the pairwise comparison matrices obtained for each level in the hierarchy of aspects.","PeriodicalId":184790,"journal":{"name":"2016 Moratuwa Engineering Research Conference (MERCon)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121542555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-05DOI: 10.1109/MERCON.2016.7480176
A. Jayasekara, M. A. Viraj J. Muthugala, A. G. Buddhika P. Jayasekara
Anthropomorphism is the attribution of human traits, emotions and intentions to non-human entities. Nowadays, development of anthropomorphic features in robotic heads is a major area of interest in the field of robotics. Many robotics heads with anthropomorphic features are developed to improve the social interaction between robots and humans. However, the existing robotic heads need improvements in construction and behaviors to facilitate more friendly interactions. This paper presents about design and development of an anthropomorphic robotic head that can make reflex actions based on external forces applied on it. The design parameters of the robotic head have been decided by examining the biomechanics of human head. The robotic head has been designed with 3 DoFs for the neck section. The developed force attentive mechanism is capable of identifying the direction of the applied force. The response of the robot depends on the direction of the external force and the response is decided by a reaction function. Functionalities of the robotic head have been verified from the experimental results and the results are presented. Furthermore, the robotic head has been designed and developed in such a way that it can be used as a research platform for future research.
{"title":"Design and development of an anthropomorphic robotic head with force attentive reflex actions","authors":"A. Jayasekara, M. A. Viraj J. Muthugala, A. G. Buddhika P. Jayasekara","doi":"10.1109/MERCON.2016.7480176","DOIUrl":"https://doi.org/10.1109/MERCON.2016.7480176","url":null,"abstract":"Anthropomorphism is the attribution of human traits, emotions and intentions to non-human entities. Nowadays, development of anthropomorphic features in robotic heads is a major area of interest in the field of robotics. Many robotics heads with anthropomorphic features are developed to improve the social interaction between robots and humans. However, the existing robotic heads need improvements in construction and behaviors to facilitate more friendly interactions. This paper presents about design and development of an anthropomorphic robotic head that can make reflex actions based on external forces applied on it. The design parameters of the robotic head have been decided by examining the biomechanics of human head. The robotic head has been designed with 3 DoFs for the neck section. The developed force attentive mechanism is capable of identifying the direction of the applied force. The response of the robot depends on the direction of the external force and the response is decided by a reaction function. Functionalities of the robotic head have been verified from the experimental results and the results are presented. Furthermore, the robotic head has been designed and developed in such a way that it can be used as a research platform for future research.","PeriodicalId":184790,"journal":{"name":"2016 Moratuwa Engineering Research Conference (MERCon)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126131771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-05DOI: 10.1109/MERCON.2016.7480137
S. Senevirathne, H. Punchihewa
This study focused on turning AISI P20 and D2 tool steels using coated-carbide cutting tools. In this experimental investigation, an emulsion cutting fluid (CF) aerosol temperature with minimum quantity lubrication (MQL) was varied from 5 °C to 20 °C and its effect on the tool life was evaluated. Trials were done for dry cutting and flood cooling at 25 °C also in same conditions. MQL revealed better tool life for both steels than dry cutting and flood cooling. The tool wear for P20 showed a quadratic behaviour against aerosol temperature, with minimum occurred at 15 °C. At 15 °C, 97% and 93% tool wear reductions were observed from dry cutting and flood cooling respectively. However at 20 °C, tool wear increased by 29% from flood cooling. For D2 steel, similar characteristics were observed with minimum wear at 15 °C. A wear reduction of 96% from dry cutting, and 93% from flood cooling was observed with at 15 °C. MQL at 15 °C leads to a potential means of reducing machining costs. However, trials need to be repeated with different tool material, work-piece material and aerosols to ascertain the generalizability of the findings.
{"title":"Effect of minimum quantity lubrication aerosol temperature on tool life in machining AISI P20 and D2 steels using coated tungsten carbide tool inserts","authors":"S. Senevirathne, H. Punchihewa","doi":"10.1109/MERCON.2016.7480137","DOIUrl":"https://doi.org/10.1109/MERCON.2016.7480137","url":null,"abstract":"This study focused on turning AISI P20 and D2 tool steels using coated-carbide cutting tools. In this experimental investigation, an emulsion cutting fluid (CF) aerosol temperature with minimum quantity lubrication (MQL) was varied from 5 °C to 20 °C and its effect on the tool life was evaluated. Trials were done for dry cutting and flood cooling at 25 °C also in same conditions. MQL revealed better tool life for both steels than dry cutting and flood cooling. The tool wear for P20 showed a quadratic behaviour against aerosol temperature, with minimum occurred at 15 °C. At 15 °C, 97% and 93% tool wear reductions were observed from dry cutting and flood cooling respectively. However at 20 °C, tool wear increased by 29% from flood cooling. For D2 steel, similar characteristics were observed with minimum wear at 15 °C. A wear reduction of 96% from dry cutting, and 93% from flood cooling was observed with at 15 °C. MQL at 15 °C leads to a potential means of reducing machining costs. However, trials need to be repeated with different tool material, work-piece material and aerosols to ascertain the generalizability of the findings.","PeriodicalId":184790,"journal":{"name":"2016 Moratuwa Engineering Research Conference (MERCon)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126141817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-05DOI: 10.1109/MERCON.2016.7480139
B. Prabuddha, R. Ranaweera, K. Mangala
Topology optimization for a considerable time has been successfully applied in the field of design for the development of light-weight structures. Especially in the aerospace sector, topology / topography optimization techniques are gaining recognition as effective tools for improving structural efficiency of newly designed aerospace vehicles. In that context, a study has been conducted on 5000 lb Over Center Buckle (OCB), which is one of the most commonly used tie down hardware to strap cargo in aircrafts. The aim of the research was to arrive at a light-weight design of the OCB without compromising on its strength and functional requirements. Key objective was to formulate a generally applicable methodology to assess and improve conventional designs of OCBs having different styles and capacities. Initially, various types of mechanical tests were conducted in accordance with SAE standard to identify the performance of commonly used 5000 lb OCB. Then a finite element model was developed and model validation was performed using experimental results. The tuned model served as a platform to carry out topology optimization where several design parameters were tested to assess their sensitivity and degree of influence for achieving higher structural efficiency. Finally, an alternative design was proposed for the existing 5000 lb OCB where 7% weight reduction could be achieved.
{"title":"Topology optimization to improve structural efficiency of 5000 lb Over-Center Buckle","authors":"B. Prabuddha, R. Ranaweera, K. Mangala","doi":"10.1109/MERCON.2016.7480139","DOIUrl":"https://doi.org/10.1109/MERCON.2016.7480139","url":null,"abstract":"Topology optimization for a considerable time has been successfully applied in the field of design for the development of light-weight structures. Especially in the aerospace sector, topology / topography optimization techniques are gaining recognition as effective tools for improving structural efficiency of newly designed aerospace vehicles. In that context, a study has been conducted on 5000 lb Over Center Buckle (OCB), which is one of the most commonly used tie down hardware to strap cargo in aircrafts. The aim of the research was to arrive at a light-weight design of the OCB without compromising on its strength and functional requirements. Key objective was to formulate a generally applicable methodology to assess and improve conventional designs of OCBs having different styles and capacities. Initially, various types of mechanical tests were conducted in accordance with SAE standard to identify the performance of commonly used 5000 lb OCB. Then a finite element model was developed and model validation was performed using experimental results. The tuned model served as a platform to carry out topology optimization where several design parameters were tested to assess their sensitivity and degree of influence for achieving higher structural efficiency. Finally, an alternative design was proposed for the existing 5000 lb OCB where 7% weight reduction could be achieved.","PeriodicalId":184790,"journal":{"name":"2016 Moratuwa Engineering Research Conference (MERCon)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126023363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-05DOI: 10.1109/MERCON.2016.7480143
C. Marasinghe, J. J. Wijetunge
The hazard to coastal communities from a landfalling tropical cyclone includes high winds causing damage as well as coastal flooding caused by the storm surge. Of the four physical processes that contribute to the total surge, i.e., the wind set-up, the wave set-up, the tide and the barometric effect, this paper is concerned with the contribution from the wave set-up induced by cyclone-generated waves breaking near the shore. Accordingly, a series of numerical experiments have been performed using a spectral wind wave model to examine and quantify the wave-set-up over a range of tropical cyclone wind speeds and at five coastal locations representative of the different coastal sectors of Sri Lanka. The numerical results have also been employed to test the accuracy and reliability of the wave set-up estimated from three of the analytical formulae available in the literature.
{"title":"Computation of nearshore wave set-up due to wind waves generated by tropical cyclones landfalling in Sri Lanka","authors":"C. Marasinghe, J. J. Wijetunge","doi":"10.1109/MERCON.2016.7480143","DOIUrl":"https://doi.org/10.1109/MERCON.2016.7480143","url":null,"abstract":"The hazard to coastal communities from a landfalling tropical cyclone includes high winds causing damage as well as coastal flooding caused by the storm surge. Of the four physical processes that contribute to the total surge, i.e., the wind set-up, the wave set-up, the tide and the barometric effect, this paper is concerned with the contribution from the wave set-up induced by cyclone-generated waves breaking near the shore. Accordingly, a series of numerical experiments have been performed using a spectral wind wave model to examine and quantify the wave-set-up over a range of tropical cyclone wind speeds and at five coastal locations representative of the different coastal sectors of Sri Lanka. The numerical results have also been employed to test the accuracy and reliability of the wave set-up estimated from three of the analytical formulae available in the literature.","PeriodicalId":184790,"journal":{"name":"2016 Moratuwa Engineering Research Conference (MERCon)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127135767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-05DOI: 10.1109/MERCON.2016.7480154
M. Prasanna, S. Senanayake, S. Wijesinghe, E. Fernando, S. Perera
Water jet looms are widely used in woven fabric manufacturing especially for synthetic fabric production. Due to massive growth in synthetic fabric production, the significance of the water jet loom becomes dominant Due to its salient features such as high production speed, low energy consumption, low noise emission, and simple maintenance procedures as compared to other loom counterparts. The major drawback of the water jet loom is its inability to produce cellulosic based fabric such as cotton because cotton yarns absorb considerably higher amount of water during weft insertion and as a result it does not properly insert through the warp sheet. Air jet weaving machine is ideal to produce cellulose based fabrics. However, air jet looms lacks in the above advantages possessed by water jet looms. For a sustainable development in the weaving industry and a competitive edge in weaving, it is mandatory to have minimum energy consumption when producing cellulose based fabrics. So, it is prudent to explore the possibility of weaving cellulosic based fabrics on a water jet loom. Hence, the authors attempted to develop an appropriate technological process to achieve this. A non-absorbent cotton yarn was developed and a water jet loom was modified in order to successfully produce cotton based fabrics on a water jet loom.
{"title":"Developing a technological process to weave cotton fabrics on water jet loom","authors":"M. Prasanna, S. Senanayake, S. Wijesinghe, E. Fernando, S. Perera","doi":"10.1109/MERCON.2016.7480154","DOIUrl":"https://doi.org/10.1109/MERCON.2016.7480154","url":null,"abstract":"Water jet looms are widely used in woven fabric manufacturing especially for synthetic fabric production. Due to massive growth in synthetic fabric production, the significance of the water jet loom becomes dominant Due to its salient features such as high production speed, low energy consumption, low noise emission, and simple maintenance procedures as compared to other loom counterparts. The major drawback of the water jet loom is its inability to produce cellulosic based fabric such as cotton because cotton yarns absorb considerably higher amount of water during weft insertion and as a result it does not properly insert through the warp sheet. Air jet weaving machine is ideal to produce cellulose based fabrics. However, air jet looms lacks in the above advantages possessed by water jet looms. For a sustainable development in the weaving industry and a competitive edge in weaving, it is mandatory to have minimum energy consumption when producing cellulose based fabrics. So, it is prudent to explore the possibility of weaving cellulosic based fabrics on a water jet loom. Hence, the authors attempted to develop an appropriate technological process to achieve this. A non-absorbent cotton yarn was developed and a water jet loom was modified in order to successfully produce cotton based fabrics on a water jet loom.","PeriodicalId":184790,"journal":{"name":"2016 Moratuwa Engineering Research Conference (MERCon)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122251289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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