Pub Date : 2018-05-01DOI: 10.1109/MERCON.2018.8421971
H.M.L.S. Bandara, N. Jayaweera, C. Gamage, I. Sanjeewa, K. Perera
Compliant parts are widely used in Aerospace, Ship building and Stamping industries. One of the critical issues in sheet metal parts is thickness variation during stack-up storage. Therefore, it is vital to investigate this issue as the dimensional tolerance is an important factor for the quality of the final product. The research described in this paper aims to solve above problem by investigating the effect of sheet metal thickness variation with the load influence during stack-up storage. A series of experimental trials were performed to investigate the influence of compliant part thickness variation with applied load and the time duration that the load acting on the part. The system described in this paper uses a small square Aluminium plate and hydraulic press to apply forces on sheet metal surface. Finite Element Analysis (FEA) techniques were used to investigate the compliant part thickness reduction by varying the load. In addition, experimental results were validated with FEA and mathematical calculations. Results are presented along with a discussion of the problems that may be encountered.
{"title":"An Investigation of Thickness Variance During Compliant Parts Storage","authors":"H.M.L.S. Bandara, N. Jayaweera, C. Gamage, I. Sanjeewa, K. Perera","doi":"10.1109/MERCON.2018.8421971","DOIUrl":"https://doi.org/10.1109/MERCON.2018.8421971","url":null,"abstract":"Compliant parts are widely used in Aerospace, Ship building and Stamping industries. One of the critical issues in sheet metal parts is thickness variation during stack-up storage. Therefore, it is vital to investigate this issue as the dimensional tolerance is an important factor for the quality of the final product. The research described in this paper aims to solve above problem by investigating the effect of sheet metal thickness variation with the load influence during stack-up storage. A series of experimental trials were performed to investigate the influence of compliant part thickness variation with applied load and the time duration that the load acting on the part. The system described in this paper uses a small square Aluminium plate and hydraulic press to apply forces on sheet metal surface. Finite Element Analysis (FEA) techniques were used to investigate the compliant part thickness reduction by varying the load. In addition, experimental results were validated with FEA and mathematical calculations. Results are presented along with a discussion of the problems that may be encountered.","PeriodicalId":6603,"journal":{"name":"2018 Moratuwa Engineering Research Conference (MERCon)","volume":"10 1","pages":"334-339"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86082664","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 : 2018-05-01DOI: 10.1109/MERCON.2018.8421937
R. Silva, Asela Dasanayaka, R. Ragel
In this paper, we propose a real-time video enhancing algorithm which uses the Graphical Processing Units(GPUs) for faster parallel computations. Also, the paper will discuss the performance gains with GPU respect to a Central Processing Units(CPUs). The video enhancing algorithm is written to address the real-time video enhancement scenario, hence this paper will discuss more on the speed and the quality of the video enhancement. The paper contains the discussion about the trade-off between the quality and speed of the real-time-video enhancement. The latter part of the paper will discuss the optimizations to have real-time performance that is needed to enhance and play videos up to 4k videos. This paper proposes a generic implementation that can be used to have high-end video quality using low-end video recording devices like mass scale CCTV cameras, etc. This implementation will use NVIDIA CUDA enabled graphics cards.
{"title":"Real-time Video Enhancement Using Graphical Processing Units","authors":"R. Silva, Asela Dasanayaka, R. Ragel","doi":"10.1109/MERCON.2018.8421937","DOIUrl":"https://doi.org/10.1109/MERCON.2018.8421937","url":null,"abstract":"In this paper, we propose a real-time video enhancing algorithm which uses the Graphical Processing Units(GPUs) for faster parallel computations. Also, the paper will discuss the performance gains with GPU respect to a Central Processing Units(CPUs). The video enhancing algorithm is written to address the real-time video enhancement scenario, hence this paper will discuss more on the speed and the quality of the video enhancement. The paper contains the discussion about the trade-off between the quality and speed of the real-time-video enhancement. The latter part of the paper will discuss the optimizations to have real-time performance that is needed to enhance and play videos up to 4k videos. This paper proposes a generic implementation that can be used to have high-end video quality using low-end video recording devices like mass scale CCTV cameras, etc. This implementation will use NVIDIA CUDA enabled graphics cards.","PeriodicalId":6603,"journal":{"name":"2018 Moratuwa Engineering Research Conference (MERCon)","volume":"6 1","pages":"549-554"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86642974","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 : 2018-05-01DOI: 10.1109/MERCON.2018.8421969
N. Gangasudan, H. Mallikarachchi
Simulation of wind action on tall building using Fluid-Structure Interaction is investigated in the present work. Wind loads on tall buildings are traditionally obtained from codes of practice and the simulations have shown that the equivalent static loads are conservative. A building model presented by the Commonwealth Advisory Aeronautical Research Council is used as a case study to assess the significance of effects coming due to fluid structure interaction and compared against the loads calculated using different codes of practices and wind tunnel testing.
{"title":"Predicting Wind Response of Tall Buildings Using Fluid-Structure Interaction","authors":"N. Gangasudan, H. Mallikarachchi","doi":"10.1109/MERCON.2018.8421969","DOIUrl":"https://doi.org/10.1109/MERCON.2018.8421969","url":null,"abstract":"Simulation of wind action on tall building using Fluid-Structure Interaction is investigated in the present work. Wind loads on tall buildings are traditionally obtained from codes of practice and the simulations have shown that the equivalent static loads are conservative. A building model presented by the Commonwealth Advisory Aeronautical Research Council is used as a case study to assess the significance of effects coming due to fluid structure interaction and compared against the loads calculated using different codes of practices and wind tunnel testing.","PeriodicalId":6603,"journal":{"name":"2018 Moratuwa Engineering Research Conference (MERCon)","volume":"70 1","pages":"345-349"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78699653","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 : 2018-05-01DOI: 10.1109/MERCON.2018.8421921
V. Ariyarathna, V. A. Coutinho, S. Pulipati, A. Madanayake, Ravi T. Wijesekara, C. Edussooriya, Len T. Bruton§, T. Gunaratne, R. Cintra
This paper presents the implementation of a two-dimensional (2-D) finite-impulse-response (FIR) trapezoidal filter based beamforming array receiver. A 2.4 GHz 16-element receive-mode IQ array is designed and used for physically measuring the beam patterns corresponding to 2-D FIR trapezoidal filters. The 16-element beamformer is implemented using the reconfigurable open architecture computing hardware version-2 (ROACH-2) field programmable gate array (FPGA) platform to perform analog to digital conversion and digital signal processing. The 2-D FIR trapezoidal filter is designed as a 16-spatial input 32-tap filter and is implemented targeting the ROACH-2’s Xilinx Virtex 6 (sx475t) FPGA chip as a filter-and-sum architecture. The receiver array is precisely rotated (keeping the transmitter fixed) to digitally measure the received energy by integrating the instantaneous power of the output of the 2-D FIR trapezoidal filter for each angle of reception. The main lobe of the measured beam pattern is well aligned with the simulated beam pattern, and the highest measured side-lobe level is −17.8 dB.
{"title":"Real-Time 2-D FIR Trapezoidal Digital Filters for 2.4 GHz Aperture Receiver Applications","authors":"V. Ariyarathna, V. A. Coutinho, S. Pulipati, A. Madanayake, Ravi T. Wijesekara, C. Edussooriya, Len T. Bruton§, T. Gunaratne, R. Cintra","doi":"10.1109/MERCON.2018.8421921","DOIUrl":"https://doi.org/10.1109/MERCON.2018.8421921","url":null,"abstract":"This paper presents the implementation of a two-dimensional (2-D) finite-impulse-response (FIR) trapezoidal filter based beamforming array receiver. A 2.4 GHz 16-element receive-mode IQ array is designed and used for physically measuring the beam patterns corresponding to 2-D FIR trapezoidal filters. The 16-element beamformer is implemented using the reconfigurable open architecture computing hardware version-2 (ROACH-2) field programmable gate array (FPGA) platform to perform analog to digital conversion and digital signal processing. The 2-D FIR trapezoidal filter is designed as a 16-spatial input 32-tap filter and is implemented targeting the ROACH-2’s Xilinx Virtex 6 (sx475t) FPGA chip as a filter-and-sum architecture. The receiver array is precisely rotated (keeping the transmitter fixed) to digitally measure the received energy by integrating the instantaneous power of the output of the 2-D FIR trapezoidal filter for each angle of reception. The main lobe of the measured beam pattern is well aligned with the simulated beam pattern, and the highest measured side-lobe level is −17.8 dB.","PeriodicalId":6603,"journal":{"name":"2018 Moratuwa Engineering Research Conference (MERCon)","volume":"37 1","pages":"350-355"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75343575","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 : 2018-05-01DOI: 10.1109/MERCON.2018.8421993
J. Karunadasa, Kgl Navarathna, R. Abeyrathna, K. Perera, K.A.I. Sandaruwan
The level of DC current accumulated at secondary phases of the distribution transformers is significant due to the proliferation of power electronic intensive loads on the distribution system. This DC current is inherently different in three phases and they disturb symmetrical magnetization of the core limbs. It directly affects the magnetizing current and also the input current while recreating a DC current at the input with a magnitude even higher than that of the secondary. Apart from input current waveform distortion, DC accumulation will create voltage distortion, corrosion in grounded electrodes, transformer losses, reducing its lifetime etc. For a detailed investigation of the influence of DC current on the operation of a transformer it is necessary to have a comprehensive model of the transformer. Such a model must incorporate differences among path lengths in the three limbs, resistances of windings, leakage inductances of windings, losses in three limbs, magnetization characteristics of three limbs including magnetic hysteresis etc. This paper presents a comprehensive model for a three-phase transformer. Magnetizing characteristic for the three limbs are obtained by two suitably designed tests, which is a specific feature of this model. The model is validated for a test transformer in the laboratory. Simulations are carried out in MATLAB Simulink for different operating conditions involving asymmetric injection of DC current by loads. Practical tests carried out on the transformer show close agreement with simulation results proving the comprehensiveness of the model. The development work, simulation setups, test details all are presented in the paper.
{"title":"Novel Three Phase Transformer Model to Accommodate the Effects of Load Injected DC","authors":"J. Karunadasa, Kgl Navarathna, R. Abeyrathna, K. Perera, K.A.I. Sandaruwan","doi":"10.1109/MERCON.2018.8421993","DOIUrl":"https://doi.org/10.1109/MERCON.2018.8421993","url":null,"abstract":"The level of DC current accumulated at secondary phases of the distribution transformers is significant due to the proliferation of power electronic intensive loads on the distribution system. This DC current is inherently different in three phases and they disturb symmetrical magnetization of the core limbs. It directly affects the magnetizing current and also the input current while recreating a DC current at the input with a magnitude even higher than that of the secondary. Apart from input current waveform distortion, DC accumulation will create voltage distortion, corrosion in grounded electrodes, transformer losses, reducing its lifetime etc. For a detailed investigation of the influence of DC current on the operation of a transformer it is necessary to have a comprehensive model of the transformer. Such a model must incorporate differences among path lengths in the three limbs, resistances of windings, leakage inductances of windings, losses in three limbs, magnetization characteristics of three limbs including magnetic hysteresis etc. This paper presents a comprehensive model for a three-phase transformer. Magnetizing characteristic for the three limbs are obtained by two suitably designed tests, which is a specific feature of this model. The model is validated for a test transformer in the laboratory. Simulations are carried out in MATLAB Simulink for different operating conditions involving asymmetric injection of DC current by loads. Practical tests carried out on the transformer show close agreement with simulation results proving the comprehensiveness of the model. The development work, simulation setups, test details all are presented in the paper.","PeriodicalId":6603,"journal":{"name":"2018 Moratuwa Engineering Research Conference (MERCon)","volume":"48 1","pages":"138-143"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78608763","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 : 2018-05-01DOI: 10.1109/MERCON.2018.8421906
A. Samarasekara, Saman Kumara, A.J.S. Madhusanka, D. Amarasinghe, L. Karunanayake
Polymer industries highly use thermoplastic polymer materials due to their low cost and attractive physical, mechanical and thermal properties. Polypropylene (PP) is the widely used thermoplastic material in the world today. Various developmental research works have been conducted by many researchers to improve the thermal and mechanical properties of polypropylene based composites materials. Cellulose can be used as a reinforcement agent in polypropylene based composites. In this research work, microcrystalline cellulose (MCC) reinforced and nanocrystalline cellulose (NCC) reinforced polypropylene based composites were prepared. The MCC and NCC were subjected to the surface modification to improve compatibility with the polypropylene. Surface modified MCC and NCC were mixed with polypropylene using laboratory scale internal mixture. Test samples based on MCC and NCC mixed with polypropylene were prepared by using compression molding technique. Tensile, impact, hardness and water absorption tests were performed in order to analyze the physical and mechanical properties. Scanning electron microscopic images, Fourier-transform infrared spectra and Differential Thermal Analysis were used to characterize developed composites. Samples containing NCC showed the increase of tensile strength and hardness with compared to samples containing pure polypropylene and MCC. Samples containing NCC and MCC showed the slightly reduction of thermal stability than pure polypropylene. However, NCC with polypropylene samples showed the higher thermal stability than MCC with polypropylene samples.
{"title":"Study of Thermal and Mechanical Properties of Microcrystalline Cellulose and Nanocrystalline Cellulose Based Thermoplastic Material","authors":"A. Samarasekara, Saman Kumara, A.J.S. Madhusanka, D. Amarasinghe, L. Karunanayake","doi":"10.1109/MERCON.2018.8421906","DOIUrl":"https://doi.org/10.1109/MERCON.2018.8421906","url":null,"abstract":"Polymer industries highly use thermoplastic polymer materials due to their low cost and attractive physical, mechanical and thermal properties. Polypropylene (PP) is the widely used thermoplastic material in the world today. Various developmental research works have been conducted by many researchers to improve the thermal and mechanical properties of polypropylene based composites materials. Cellulose can be used as a reinforcement agent in polypropylene based composites. In this research work, microcrystalline cellulose (MCC) reinforced and nanocrystalline cellulose (NCC) reinforced polypropylene based composites were prepared. The MCC and NCC were subjected to the surface modification to improve compatibility with the polypropylene. Surface modified MCC and NCC were mixed with polypropylene using laboratory scale internal mixture. Test samples based on MCC and NCC mixed with polypropylene were prepared by using compression molding technique. Tensile, impact, hardness and water absorption tests were performed in order to analyze the physical and mechanical properties. Scanning electron microscopic images, Fourier-transform infrared spectra and Differential Thermal Analysis were used to characterize developed composites. Samples containing NCC showed the increase of tensile strength and hardness with compared to samples containing pure polypropylene and MCC. Samples containing NCC and MCC showed the slightly reduction of thermal stability than pure polypropylene. However, NCC with polypropylene samples showed the higher thermal stability than MCC with polypropylene samples.","PeriodicalId":6603,"journal":{"name":"2018 Moratuwa Engineering Research Conference (MERCon)","volume":"1984 1","pages":"465-470"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90341386","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 : 2018-05-01DOI: 10.1109/MERCON.2018.8421988
R. Ramasinghe, N. Liyanage
Reinforcement of Carboxylated Acrylonitrile Butadiene rubber (XNBR) latex using surface modified silica and nanosilica has been investigated in this study. Surface modifiers are special category of substances used to impart better interactions between filler and latex in polymer-latex industry. Modification of both micro silica and nano silica particles’ surface with natural method (NPs) was conferred by an in-situ surface modification process using cellulose, gelatin, chitosan and collagen separately. The reinforcement effect of surface modified silica could be assessed by determining swelling, crosslink density, tensile and tear properties of vulcanized latex films. The distribution of modified silica within the latex films was studied by observing the cross sections of films through a metallurgical microscope. In this study cellulose was found to be the most effective surface modifier probably by discouraging filler/filler interactions while encouraging rubber/filler interactions.
{"title":"Effectiveness of Natural Polymers as Surface Modifiers in Enhancing Reinforcing Action of Silica in Carboxylated NBR Latices","authors":"R. Ramasinghe, N. Liyanage","doi":"10.1109/MERCON.2018.8421988","DOIUrl":"https://doi.org/10.1109/MERCON.2018.8421988","url":null,"abstract":"Reinforcement of Carboxylated Acrylonitrile Butadiene rubber (XNBR) latex using surface modified silica and nanosilica has been investigated in this study. Surface modifiers are special category of substances used to impart better interactions between filler and latex in polymer-latex industry. Modification of both micro silica and nano silica particles’ surface with natural method (NPs) was conferred by an in-situ surface modification process using cellulose, gelatin, chitosan and collagen separately. The reinforcement effect of surface modified silica could be assessed by determining swelling, crosslink density, tensile and tear properties of vulcanized latex films. The distribution of modified silica within the latex films was studied by observing the cross sections of films through a metallurgical microscope. In this study cellulose was found to be the most effective surface modifier probably by discouraging filler/filler interactions while encouraging rubber/filler interactions.","PeriodicalId":6603,"journal":{"name":"2018 Moratuwa Engineering Research Conference (MERCon)","volume":"26 1","pages":"443-448"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91313960","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 : 2018-05-01DOI: 10.1109/MERCON.2018.8421990
Asanka S. Rodrigo, V. Priyanka
Electric vehicles (EV) are becoming the most preferred and rapidly growing mode of transportation all around the world. Development of battery technologies and attention on residential scale renewable energy based distribution generation has accelerated the growth of the EV market. Rechargeable batteries are the most common type of energy storage in commercial EVs. A regulated DC current shall be supplied to EV charging and the charging currents are higher compared to conventional loads. Power electronic converters are essential for the AC DC conversion thus a distorted current is fed to the nonlinear load. This will give rise to power quality issues such as voltage unbalance, voltage fluctuations and harmonics in the distribution systems. It is important to study and quantify the power quality impacts to make sure the healthy operation of the distribution system. A commonly available EV charger was modelled in Matlab to study EV chargers in this research and a comprehensive harmonic analysis was carried out in a LV distribution feeder. The research studies impact to the feeder with different EV penetration levels as well as EV charging with different load levels.
{"title":"Impact of High Penetration of EV Charging on Harmonics in Distribution Networks","authors":"Asanka S. Rodrigo, V. Priyanka","doi":"10.1109/MERCON.2018.8421990","DOIUrl":"https://doi.org/10.1109/MERCON.2018.8421990","url":null,"abstract":"Electric vehicles (EV) are becoming the most preferred and rapidly growing mode of transportation all around the world. Development of battery technologies and attention on residential scale renewable energy based distribution generation has accelerated the growth of the EV market. Rechargeable batteries are the most common type of energy storage in commercial EVs. A regulated DC current shall be supplied to EV charging and the charging currents are higher compared to conventional loads. Power electronic converters are essential for the AC DC conversion thus a distorted current is fed to the nonlinear load. This will give rise to power quality issues such as voltage unbalance, voltage fluctuations and harmonics in the distribution systems. It is important to study and quantify the power quality impacts to make sure the healthy operation of the distribution system. A commonly available EV charger was modelled in Matlab to study EV chargers in this research and a comprehensive harmonic analysis was carried out in a LV distribution feeder. The research studies impact to the feeder with different EV penetration levels as well as EV charging with different load levels.","PeriodicalId":6603,"journal":{"name":"2018 Moratuwa Engineering Research Conference (MERCon)","volume":"3 1","pages":"340-344"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87825259","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 : 2018-05-01DOI: 10.1109/MERCON.2018.8421911
I. Anuradha, B. Perera, H. Mallawarachchi
Construction industry is one of the main exploiters of natural resources. During building construction, a large amount of Embodied Carbon is released to the atmosphere. Thus, this research was aimed to determine the significance of whole life Embodied Carbon (EC) in the selection of wall materials for use in building construction. To achieve this aim, mixed research approach was used. A comprehensive literature review and ten expert interviews were conducted first as a part to find out the significance of EC to the construction industry. Subsequently, a questionnaire survey and a base model building consisting of work studies, a desk study and a documentary review were used to collect the required data. The data collected were analyzed to find out the most suitable material out of the three types of wall materials selected. The results of the analysis indicate that eco interlocking brick is the most suitable wall material (compared to cement block and conventional brick) in terms of EC and initial and maintenance cost. The study also provides a firm base for future researchers engaged in the studies to find out the EC content of building materials.
{"title":"Embodied Carbon and Cost Analysis to Identify the Most Appropriate Wall Materials for Buildings: Whole Life Cycle Approach","authors":"I. Anuradha, B. Perera, H. Mallawarachchi","doi":"10.1109/MERCON.2018.8421911","DOIUrl":"https://doi.org/10.1109/MERCON.2018.8421911","url":null,"abstract":"Construction industry is one of the main exploiters of natural resources. During building construction, a large amount of Embodied Carbon is released to the atmosphere. Thus, this research was aimed to determine the significance of whole life Embodied Carbon (EC) in the selection of wall materials for use in building construction. To achieve this aim, mixed research approach was used. A comprehensive literature review and ten expert interviews were conducted first as a part to find out the significance of EC to the construction industry. Subsequently, a questionnaire survey and a base model building consisting of work studies, a desk study and a documentary review were used to collect the required data. The data collected were analyzed to find out the most suitable material out of the three types of wall materials selected. The results of the analysis indicate that eco interlocking brick is the most suitable wall material (compared to cement block and conventional brick) in terms of EC and initial and maintenance cost. The study also provides a firm base for future researchers engaged in the studies to find out the EC content of building materials.","PeriodicalId":6603,"journal":{"name":"2018 Moratuwa Engineering Research Conference (MERCon)","volume":"41 1","pages":"43-48"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88555611","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 : 2018-05-01DOI: 10.1109/MERCON.2018.8421974
W. E. P. Sampath Ediriweera, K. Jayarathna, J. R. Lucas, R. Samarasinghe
This paper studies the use of circular boundary and square boundary configurations for analyzing fractal char- acteristics of creeping discharges over solid dielectric materials. A two dimensional stochastic dielectric breakdown model is used to simulate creeping discharges. The square boundary and the circular boundary represent a square shaped dielectric sample and a circular shaped dielectric sample respectively. These configurations are used to analyze the effect of using different shaped samples for creeping discharge experiment in a laboratory environment. Fractal dimension of the simulated patterns, calculated by box counting method and mass radius relation method are used to analyze the effect of circular shaped and square shaped dielectric samples for creeping discharge analysis.
{"title":"Effect of the Shape of the Insulator on Fractal Characteristics of Creeping Discharges","authors":"W. E. P. Sampath Ediriweera, K. Jayarathna, J. R. Lucas, R. Samarasinghe","doi":"10.1109/MERCON.2018.8421974","DOIUrl":"https://doi.org/10.1109/MERCON.2018.8421974","url":null,"abstract":"This paper studies the use of circular boundary and square boundary configurations for analyzing fractal char- acteristics of creeping discharges over solid dielectric materials. A two dimensional stochastic dielectric breakdown model is used to simulate creeping discharges. The square boundary and the circular boundary represent a square shaped dielectric sample and a circular shaped dielectric sample respectively. These configurations are used to analyze the effect of using different shaped samples for creeping discharge experiment in a laboratory environment. Fractal dimension of the simulated patterns, calculated by box counting method and mass radius relation method are used to analyze the effect of circular shaped and square shaped dielectric samples for creeping discharge analysis.","PeriodicalId":6603,"journal":{"name":"2018 Moratuwa Engineering Research Conference (MERCon)","volume":"16 1","pages":"506-510"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87978801","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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