2021 Moratuwa Engineering Research Conference (MERCon)最新文献_第5页

Developing an Airline Choice Model for Economy Class Passengers in Sri Lanka 斯里兰卡经济舱乘客航空公司选择模型的研究

2021 Moratuwa Engineering Research Conference (MERCon) Pub Date : 2021-07-27 DOI: 10.1109/MERCon52712.2021.9525796

Pasindu Nayanashan, Anuja Fernando

引用次数: 0

Effect of Influent Volumetric Loading of Skim Latex Wastewater on Anaerobic Sulfate Reduction 进水容量负荷对脱脂乳胶废水厌氧硫酸盐还原的影响

2021 Moratuwa Engineering Research Conference (MERCon) Pub Date : 2021-07-27 DOI: 10.1109/MERCon52712.2021.9525703

I. Samarathunga, P. Rathnasiri

{"title":"Effect of Influent Volumetric Loading of Skim Latex Wastewater on Anaerobic Sulfate Reduction","authors":"I. Samarathunga, P. Rathnasiri","doi":"10.1109/MERCon52712.2021.9525703","DOIUrl":"https://doi.org/10.1109/MERCon52712.2021.9525703","url":null,"abstract":"Wastewater generated in skim latex industry is rich in high sulfate concentrations, ammonia and protein. This research study investigates the effect of influent volumetric loading of Skim Latex Wastewater (SLW) on anaerobic sulfate reduction. Experiment was conducted using two semi-batch reactors operated under completely anaerobic condition. Operating volume and the temperature were 2.5 litre and 35 ±1°C respectively. This experiment was conducted in three phases VL01, VL02 and VL03 by feeding the reactor at 33.2 l/m3.d, 50.0 l/m3.d and 100.0 l/m3.d respectively. SLW contained influent COD/SO4−2 ratio of 2.7, whereas the influent COD/TKN (Total Kjeldahl Nitrogen) ratio was 10.1. Complete sulfate reduction was observed in all phases under anaerobic condition. However, the least average rate of sulfate reduction and overall percentage sulfate reduction was observed for the 100.0 l/m3.d. During this phase, anaerobic reactor showed symptoms of overloading, unstable and most affected with shock load. In VL03, time taken for complete sulfate reduction increased by 77.5% as a result of the high rate of ammonia formation. For SLW, sulfate degradation reduces at higher volumetric loading, but for moderate volumetric loading sulfate reduction was efficient, and ammonia inhibition could not be observed.","PeriodicalId":6855,"journal":{"name":"2021 Moratuwa Engineering Research Conference (MERCon)","volume":"15 1","pages":"226-230"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78307068","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}

引用次数: 0

Application of Nanotechnology and Nanomaterials in the Construction Industry: The Case of Sri Lanka 纳米技术和纳米材料在建筑行业的应用:斯里兰卡的案例

2021 Moratuwa Engineering Research Conference (MERCon) Pub Date : 2021-07-27 DOI: 10.1109/MERCon52712.2021.9525756

M. I. M. Safshath, K. Waidyasekara, G. Tennakoon

{"title":"Application of Nanotechnology and Nanomaterials in the Construction Industry: The Case of Sri Lanka","authors":"M. I. M. Safshath, K. Waidyasekara, G. Tennakoon","doi":"10.1109/MERCon52712.2021.9525756","DOIUrl":"https://doi.org/10.1109/MERCon52712.2021.9525756","url":null,"abstract":"Nanotechnology is one of the evolving modern technologies, increasingly being adopted in the construction industry. Nanomaterials provide numerous advantages over conventional materials such as improvements in quality and sustainability performance and reduction in cost and time for use. Sri Lanka is geographically rich with mineral resources that contain suitable raw materials for producing nanomaterials. Despite this, adoption of nanotechnology in the Sri Lankan construction industry is low. This paper therefore aims to investigate the availability and application of nanotechnology and nanomaterials in the Sri Lankan construction industry. Considering the novelty of the area, a qualitative research approach was adopted for this study. Semi-structured interviews were conducted with experts in the field of nanotechnology to gather the required data and content analysis techniques were used to analyze the qualitative data collected. The study findings reveal that nanomaterials can be produced using locally available mineral resources. However, Sri Lanka is yet to realize the optimum value from its mineral resources that can be used in the production of nanomaterials. Further empirical opinions regarding the feasibility of producing nanomaterials in Sri Lanka are also offered through this research.","PeriodicalId":6855,"journal":{"name":"2021 Moratuwa Engineering Research Conference (MERCon)","volume":"185 1","pages":"7-12"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75407565","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}

引用次数: 0

Keynote Address: Sustainable Manufacturing with Digital Integration for Advancing the Circular Economy: Product and Process Innovations for Next Generation Manufacturing 主题演讲:可持续制造与数字集成推进循环经济:下一代制造的产品和工艺创新

2021 Moratuwa Engineering Research Conference (MERCon) Pub Date : 2021-07-27 DOI: 10.1109/mercon52712.2021.9525731

I. S. Jawahir

引用次数: 0

Lability and Bioavailability of Toxic Heavy Metals in Ratnapura District Gem Sediments, Sri Lanka 斯里兰卡Ratnapura地区宝石沉积物中有毒重金属的稳定性和生物利用度

2021 Moratuwa Engineering Research Conference (MERCon) Pub Date : 2021-07-27 DOI: 10.1109/MERCon52712.2021.9525637

S. Sandanayake, S. Diyabalanage, H. Wijesekara, M. Vithanage

{"title":"Lability and Bioavailability of Toxic Heavy Metals in Ratnapura District Gem Sediments, Sri Lanka","authors":"S. Sandanayake, S. Diyabalanage, H. Wijesekara, M. Vithanage","doi":"10.1109/MERCon52712.2021.9525637","DOIUrl":"https://doi.org/10.1109/MERCon52712.2021.9525637","url":null,"abstract":"Ratnapura district is composed of alluvial sedimentary gem deposits. These deposits have a variety of gem minerals which may contain toxic heavy metals. In this study, the fate of heavy metals associated with gem minerals was investigated through a quantitative determination. Sediments collected from 15 gem pits were analysed for total, exchangeable, and bioavailable fractions of toxic heavy metals. Air-dried, ground, and sieved samples were microwave acid digested using HNO3, HCl, and HF. For exchangeable metal fraction analysis, samples were extracted with 1 M MgCl2 solution. Bioavailable metal fraction was extracted by adding 0.01 M CaCl2 solution. The extractions were analysed using AAS. Results indicated high concentrations of Fe, Zn, and Pb in total heavy metal content which averaged 49 g kg−1, 223 mg kg−1, and 153 mg kg−1 respectively. Abundance of metals was recorded as Fe > Zn > Mn > Pb > As > Ni > Cu > Co > Cd. Exchangeable and bioavailable metal fractions showed more or less a similar order. Metal concentrations increased with the increase of soil depth. This analysis confirmed that a considerable amount of toxic heavy metals extracted and transported to the surrounding environment during the gem mining process causing contamination.","PeriodicalId":6855,"journal":{"name":"2021 Moratuwa Engineering Research Conference (MERCon)","volume":"43 1","pages":"427-431"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80738217","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}

引用次数: 0

A Power-Flow Based Investigation into the Response of Buildings to Ground-Borne Vibration from Underground Railways 基于潮流的建筑物对地下铁路地面振动响应研究

2021 Moratuwa Engineering Research Conference (MERCon) Pub Date : 2021-07-27 DOI: 10.1109/MERCon52712.2021.9525727

T. Edirisinghe, J. Talbot

{"title":"A Power-Flow Based Investigation into the Response of Buildings to Ground-Borne Vibration from Underground Railways","authors":"T. Edirisinghe, J. Talbot","doi":"10.1109/MERCon52712.2021.9525727","DOIUrl":"https://doi.org/10.1109/MERCon52712.2021.9525727","url":null,"abstract":"Ground-borne vibration in buildings is a growing problem in crowded cities due to the pressure to build ever closer to underground railway tunnels. Despite advances in numerical models for the prediction of ground-borne vibration, it is yet unclear how effective deep piled foundations are at mitigating the vibration transmitted into a building compared to shallow foundations, such as footings. The power-flow insertion gain is used as a measure of the building's overall vibration performance when piles, rather than footings, are included in the foundation. The tunnel-foundation system is based on the pipe-in-pipe model of a longitudinally invariant tunnel coupled to a boundary-element model of the foundation using an iterative wave-scattering approach. The initial theoretical study presented in this paper shows that piles generally attenuate the vibration levels in a benchmark building compared to footings. It is also shown how a simplified model for a tall building, based on a series of individual dashpots, can account for the modification of the foundation vibration field when the building is constructed.","PeriodicalId":6855,"journal":{"name":"2021 Moratuwa Engineering Research Conference (MERCon)","volume":"95 1","pages":"136-141"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90710292","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}

引用次数: 1

Isolation and Characterization of Microcrystalline Cellulose from Rice Straw 水稻秸秆微晶纤维素的分离与表征

2021 Moratuwa Engineering Research Conference (MERCon) Pub Date : 2021-07-27 DOI: 10.1109/MERCon52712.2021.9525752

K.P.T. Wathsala, K. M. Weerakkody, V. Weragoda

{"title":"Isolation and Characterization of Microcrystalline Cellulose from Rice Straw","authors":"K.P.T. Wathsala, K. M. Weerakkody, V. Weragoda","doi":"10.1109/MERCon52712.2021.9525752","DOIUrl":"https://doi.org/10.1109/MERCon52712.2021.9525752","url":null,"abstract":"This research work is based on process optimization of extraction of microcrystalline cellulose in Sri Lankan facilities. The extraction consists of two main steps that are isolating chemically purified cellulose from rice straw of BG352 rice species and extracting microcrystalline cellulose from cellulose. Grinding, dewaxing, delignification, bleaching, acid hydrolysis, centrifugation, dialysis, sonication and freeze-drying are the basic procedures in this extraction process. Grinding, purification processes, acid hydrolysis and sonication was performed as per the records of optimized procedures in the literature. Centrifugation and dialysis were optimized in this study. The optimum process parameters for centrifugation were 8000rpm of centrifugation speed, 20°C of centrifugation temperature, 40 minutes of centrifugation time and the dialysis were 28 °C of dialysis temperature and 4 days of dialysis time for 12-14 kDa molecular weight cutoff membrane. Testing and characterization were performed after each procedure using Scanning Electron Microscope, X-ray diffractometer, Laser particle analyzer, Fourier Transform Infrared microscope as apparatus and ImageJ, Origin as software for result analyzing. And the study successfully achieved the aspects of extracting chemically purified microcellulose yielding 18.68% of harvest with 70.25% of crystallinity index, extracting cellulose fibers of $5.445mumathrm{m}$ in average diameter.","PeriodicalId":6855,"journal":{"name":"2021 Moratuwa Engineering Research Conference (MERCon)","volume":"6 1","pages":"670-675"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87539595","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}

引用次数: 2

Design and Simulation of a 4-DoF Vibratory Gyroscope 四自由度振动陀螺仪的设计与仿真

2021 Moratuwa Engineering Research Conference (MERCon) Pub Date : 2021-07-27 DOI: 10.1109/MERCon52712.2021.9525656

K.M.T.M.B. Konara, Y. Amarasinghe

引用次数: 2

Prevent Data Exfiltration on Smart Phones Using Audio Distortion and Machine Learning 使用音频失真和机器学习防止智能手机上的数据泄露

2021 Moratuwa Engineering Research Conference (MERCon) Pub Date : 2021-07-27 DOI: 10.1109/MERCon52712.2021.9525639

Menaka Moonamaldeniya, V.R.S.C. Priyashantha, M. Gunathilake, Y.M.P.B. Ransinghe, A. Ratnayake, P. Abeygunawardhana

{"title":"Prevent Data Exfiltration on Smart Phones Using Audio Distortion and Machine Learning","authors":"Menaka Moonamaldeniya, V.R.S.C. Priyashantha, M. Gunathilake, Y.M.P.B. Ransinghe, A. Ratnayake, P. Abeygunawardhana","doi":"10.1109/MERCon52712.2021.9525639","DOIUrl":"https://doi.org/10.1109/MERCon52712.2021.9525639","url":null,"abstract":"Attacks on mobile devices have gained a significant amount of attention lately. This is because more and more individuals are switching to smartphones from traditional non-smartphones. Therefore, attackers or cybercriminals are now getting on the bandwagon to have an opportunity at obtaining information stored on smartphones. In this paper, we present an Android mobile application that will aid to minimize data exfiltration from attacks, such as, Acoustic Side-Channel Attack, Clipboard Jacking, Permission Misuse and Malicious Apps. This paper will commence its inception with an introduction explaining the current issues in general and how attacks such as side-channel attacks and clipboard jacking paved the way for data exfiltration. We will also discuss a few already existing solutions that try to mitigate these problems. Moving on to the methodology we will emphasize how we came about the solution and what methods we followed to achieve the end goal of securing the smartphone. In the final section, we will discuss the outcomes of the project and conclude what needs to be done in the future to enhance this project so that this mobile application will continue to keep the user's data safe from the criminals' grasps.","PeriodicalId":6855,"journal":{"name":"2021 Moratuwa Engineering Research Conference (MERCon)","volume":"18 1","pages":"345-350"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85334434","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}

引用次数: 0

Developing a Coconut De-Shelling Mechanism for Improved Safety and Productivity in Virgin Coconut Oil Production 开发椰子去壳机制，提高初榨椰子油生产的安全性和生产率

2021 Moratuwa Engineering Research Conference (MERCon) Pub Date : 2021-07-27 DOI: 10.1109/MERCon52712.2021.9525793

O.G.S. Pandipperuma, R.P.D. Niranjana, H. Kumarasiri, J. Gamage, K. Mangala

{"title":"Developing a Coconut De-Shelling Mechanism for Improved Safety and Productivity in Virgin Coconut Oil Production","authors":"O.G.S. Pandipperuma, R.P.D. Niranjana, H. Kumarasiri, J. Gamage, K. Mangala","doi":"10.1109/MERCon52712.2021.9525793","DOIUrl":"https://doi.org/10.1109/MERCon52712.2021.9525793","url":null,"abstract":"Virgin coconut oil manufacturing is one of the major products for both export and local markets in Sri Lanka. Most of the large and small-scale manufacturers encounter many issues in the process of de-shelling in terms of both safety and productivity. On average at least 5 accidents are reported to have occurred in the industry per month. Therefore, the purpose of this paper is to introduce an improved de-shelling mechanism that helps coconut oil manufacturers to increase their operator safety and productivity. The safety and performance parameters of the de-shelling operation were established using a review of the literature. Then the existing coconut de-shelling operation was analyzed for its safety and productivity using an industrial case study. Basic concepts were generated and evaluated to develop a final design using the fundamental machine design principles. The developed concepts were tested by benchmarking against the safety and productivity Key Performance Indicators (KPIs) using 3D modelling, and experiments. The proposed solution offers promising results to address the safety and productivity issues. However, there is room for further improvements in bringing the design up to the commercial.","PeriodicalId":6855,"journal":{"name":"2021 Moratuwa Engineering Research Conference (MERCon)","volume":"8 1","pages":"208-213"},"PeriodicalIF":0.0,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89047987","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}

引用次数: 0