Journal of Energy and Safety Technology (JEST)最新文献

{"title":"DEVELOPMENT OF PREVENTIVE COUNTERMEASURES TO COMBAT COVID-19 PANDEMIC IN SMALL AND MEDIUM-SIZED ENTERPRISES IN MALAYSIA","authors":"I. Hirman, M. H. Hassim, Norashikin Ismail, Hafizah Mahmud","doi":"10.11113/jest.v6n1.144","DOIUrl":"https://doi.org/10.11113/jest.v6n1.144","url":null,"abstract":"The World Health Organization announced the COVID-19 pandemic in 2020, and it has since infected over 286 million people worldwide in 2021, killing over 5.4 million. In Malaysia, the disease infected approximately 2,758,086 people, resulting in 31,487 deaths. Malaysian government has enacted a Movement Control Order (MCO) under the National Recovery Plan (NRP) to contain the infection. The multiple MCO phases resulted in the closure of numerous small and medium-sized enterprises (SMEs), resulting in revenue loss and employment losses. The objectives of this research include developing an efficient COVID-19 preventive countermeasure or enhance existing MITI Safe@Work guidelines for Malaysian SMEs and to suggest improvements to the National Recovery Plan roadmap and the MySejahtera system. An open-ended questionnaire survey is sent to Malaysian workers with safety or health background to obtain their professional information. By using Excel and NVivo software, 15 respondents’ answers are chosen for the qualitative analysis. The results include analysing experts’ valuation and insights on the existing countermeasures, NRP roadmap, MySejahtera system, development of preventive protocols for SMEs workplace, suggestion of improvements to the NRP roadmap and MySejahtera system application. In conclusion, these indicate that there are still improvements that can be made to the guidelines implemented by the government in the future with proper studies.","PeriodicalId":15706,"journal":{"name":"Journal of Energy and Safety Technology (JEST)","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87700278","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}

{"title":"ESCALATOR STEP DISPLACEMENT’S ACCIDENT: FORENSIC ENGINEERING APPROACH","authors":"Mohd Shamsuri Khalid, Zainur Akramin Zaini, Muhammad Ariff ABDUL RAZAK, Nur Athirah Diyana Mohammad Yusof","doi":"10.11113/jest.v6n1.145","DOIUrl":"https://doi.org/10.11113/jest.v6n1.145","url":null,"abstract":"In Malaysia, escalator accidents caused injuries or fatalities. As a result, a forensic engineering technique was employed to look into the real causes of an escalator malfunction. There was escalator that occurred in 2016, KL Sentral. The escalator accident in 2016. The escalator step displacement is the clearance of a step along the vertical and lateral axes. According to BS EN 115-2017, a step's clearance shall be measured. Step alignment of the escalator steps pass through the comb will be affected by step displacement that is outside of the permitted range, either the lateral or vertical direction that led to collision. The alignment of the escalator steps that moving through the comb will be hampered by step displacement that is more than the standard and it may result in a collision between the two parts on either the upper landing platform or lower landing platform. The impact from the collision of steps and combs may also injured escalator passengers. Hence, the clearance of the step in the vertical and lateral direction at any time. It is crucial to inspect and measure the step displacement parameter for both lateral and vertical step displacement. Improper installation of the step axle slot component on the step shaft; lateral step displacement is caused by clearance between a bush and stopper ring component, while vertical step displacement is caused by clearance between an axle slot and bush component. Prior, installation of those steps must be done carefully to avoid any clearance to prevent step displacement’s accident occurred.","PeriodicalId":15706,"journal":{"name":"Journal of Energy and Safety Technology (JEST)","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87999665","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}

{"title":"TAGUCHI OPTIMIZATION OF WATER SAVONIUS TURBINE FOR LOW-VELOCITY INLETS USING CFD APPROACH","authors":"Mohammed Baqer Zaki Yahya Al-quraishi","doi":"10.11113/jest.v6n1.137","DOIUrl":"https://doi.org/10.11113/jest.v6n1.137","url":null,"abstract":"One of the renewable energy technologies for producing electricity from moving water is the Savonius turbine. This paper optimizes the Savonius turbine performance by conducting several CFD simulations and utilizing the mixed-level Taguchi method. The quality function was first created, and then the levels and factors were determined. After analyzing the mesh and the boundary conditions, the orthogonal array was built and the CFD simulation was executed for each run. The diameter is the parameter that has the greatest influence on the hydrodynamic performance, according to the Taguchi analysis, which demonstrated the optimal combinations of the parameters in low-speed streams. The main finding was that the modified water turbine’s power of coefficient (Cp) had a 15% improvement over the original design.","PeriodicalId":15706,"journal":{"name":"Journal of Energy and Safety Technology (JEST)","volume":"183 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90831424","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}

{"title":"AEDES SURVEILLANCE AND OVIPOSITION PREFERENCES: A CASE STUDY WITHIN UNIVERSITY CAMPUS AND HOSPITAL AREA","authors":"S. Anua, Amiratul Aifa Mohamad Asri, Nurul Nazihah Khairuddin, Nur Syahirah Mohd Sukery, Nur Fatin Fatihah Mahmud @ Mansor, Mohd Amierul Aieman Mohd Nordin, Noor Sarahida Man","doi":"10.11113/jest.v6n1.148","DOIUrl":"https://doi.org/10.11113/jest.v6n1.148","url":null,"abstract":"The aim of this study was to determine the prevalence and preference of the Aedes mosquitoes to oviposit based on the container index, types of container and types of water. To achieve the aim, 58 ovitraps consisted two types, modified can and plactic material Aedes Larva Ovitrap (ALOT), each were placed side by side at selected sampling sites within a university campus and teaching hospital area. Five different types of water were used (rain water, tap water, reverse osmosis water, pond water and well water).  The identified Aedes species in this study were more for Aedes Albopictuscompared to Aedes Aegypti, with more mosquito eggs were oviposited in modified can and rain water. In conclusion, Aedes surveillance using ovitrap is the most sensitive, cost-effective and reliable method to detect the presence of Aedes species.","PeriodicalId":15706,"journal":{"name":"Journal of Energy and Safety Technology (JEST)","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82887898","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}

{"title":"SIZING ALGORITHM OF SOLAR-POWERED WATER PUMPING SYSTEM FOR DOMESTIC APPLICATION USING PARTICLE SWARM OPTIMIZATION","authors":"Siang Hong Jing, S. M. Hussin, Assoc. Prof. Dr. Norzanah Rosmin, Dalila Mat Said, A. Nawabjan, Madihah Md Rasid","doi":"10.11113/jest.v6n1.149","DOIUrl":"https://doi.org/10.11113/jest.v6n1.149","url":null,"abstract":"Due to some issues faced in rural areas such as increasing water demand, the limited reach of electricity, as well as the scarcity of fossil fuel and its negative impact on the environment, renewable energy water pumping systems emerges as an excellent solution to solve those problems. In this case, the components in the renewable energy water pumping system ought to be optimized to improve the effectiveness of the system. This study was aimed at developing and analyzing an optimization model for the sizing of solar-powered water pumping systems for domestic applications. The sizing algorithm was developed using Particle Swarm Optimization (PSO) in MATLAB software. As a result of optimization, a summary of the main findings was provided, which include the optimal values for the number of solar panels, water tank capacity, and water pump power that minimize system costs and fulfill the water demand simultaneously. To investigate the performance of the proposed algorithm, several case studies have been evaluated by varying the total dynamic head (TDH) and water demands. In summary, TDH value primarily affects the number of PV panels and pump power, leaving the water tank capacity unchanged. However, the variations in water demand can impact all three parameters: the number of PV panels, water tank capacity, and water pump power. Overall, by applying the PSO method in the sizing algorithm of a solar-powered water pumping system, the cost could be minimized, and it would be able to cover the cost of water storage that supports the water demand of a certain application. \u0000 ","PeriodicalId":15706,"journal":{"name":"Journal of Energy and Safety Technology (JEST)","volume":"247 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86168416","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}

{"title":"Hazard Identification and Physical Parameters Measurement in Dental Laboratories","authors":"S. Anua, Faridah Naim, Nurul Ainun Hamzah, Juskasmini Jusoh, Md Khairul Azuan Che Azid, Zakaria Kasim","doi":"10.11113/jest.v5n2.102","DOIUrl":"https://doi.org/10.11113/jest.v5n2.102","url":null,"abstract":"Substances such as dental materials routinely used in dental procedures such as acrylate compounds, organic solvents, disinfectants can spread into air within the dental working environment and affect the indoor air quality (IAQ). This study aimed to identify the hazards at dental laboratories and measure the physical parameters of IAQ such as particulate matter (PM), temperature and humidity. Hazard Identification, Risk Assessment and Risk Control (HIRARC) analysis was conducted during walk through survey, then the area monitoring of PM10, PM2.5, temperature and humidity was conducted using particle air counter for eight hours at each dental laboratories: Prostethic Lab, Orthodontic Lab, Maxillofacial Lab, Plaster Room, Teaching Lab 1 and Teaching Lab 2. The concentration of PM10 and PM2.5 were below the acceptable level at each laboratory except for PM10 at the Prostethic Lab (205.8 μg/m3 in 2018 and 163.0 μg/m3 in 2020) which were above 150 μg/m3 as referred to the Industry Code of Practice on Indoor Air Quality 2010 by the Department of Occupational Health and Safety, Malaysia. It is important to assess the HIRARC and determine the physical parameters in dental laboratories to ensure the safety and health of the workers are guaranteed. Hence continuous monitoring and training should be conducted to ensure the prevention and control measures are efficient.","PeriodicalId":15706,"journal":{"name":"Journal of Energy and Safety Technology (JEST)","volume":"99 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74825533","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}

{"title":"Energy Efficiency In Optical-Wireless Access Network Using Dynamic Bandwidth Allocation","authors":"M. Asafa, H. Lasisi, Olanrewaju Olufemi Olawumi, T. Awofolaju","doi":"10.11113/jest.v5n2.111","DOIUrl":"https://doi.org/10.11113/jest.v5n2.111","url":null,"abstract":"High capacity networks are needed for enormous quantity of internet traffic, which is driven by both the exponential growth of the number of people using the internet and the ongoing introduction of new high-bandwidth requiring applications. Combining optical and wireless technologies is a new and promising access network solution. The energy efficiency of telecommunication networks is therefore attracting increasing attention today than in the past. This study is aimed at evaluating energy efficiency of optical-wireless access network which combines Passive Optical Network (PON) and Long Term Evolution - Advanced (LTE-A) networks into one. The network was designed using Optimum Network Engineering Tool (OPNET) modeler software. Traffic was generated using inbuilt tools provided in the OPNET modeler software. Dynamic Bandwidth Allocation (DBA) algorithm was applied on the network and simulation was carried out using the simulation tool provided by OPNET to evaluate the effect of the DBA algorithm on the energy consumption and efficiency in the network. The findings showed energy utilization of 430 watt-second when DBA algorithm was applied on the access network as against 700 watt-second when it was not activated. This shows a 38.6% energy conservation. It was concluded that with the application of energy saving techniques to combined optical-wireless access network, substantial energy could be conserved even in the presence of heavy traffic without compromising the quality of service of the access network.","PeriodicalId":15706,"journal":{"name":"Journal of Energy and Safety Technology (JEST)","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83069650","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}

{"title":"Operational Conditions affecting Biohythane Production and its Kinetic Model: A Review","authors":"Puteri Nur Syazwani Mohd Kopli, M. H. Hassim","doi":"10.11113/jest.v5n2.126","DOIUrl":"https://doi.org/10.11113/jest.v5n2.126","url":null,"abstract":"Recently, the global carbon footprint issue is rising significantly due to fossil fuel demand. Biohythane, which is produced from anaerobic digestion is found as an alternative fuel to address this problem. Even though quite a number of reviews have been done before on biohythane production process, an in-depth review particularly on biohythane kinetic study is not available until now. Therefore, this review paper discusses the general anaerobic digestion process of biohythane production as well as its operating factors such as temperature, pH, and microbial population in improving the productivity. In addition, this paper also discusses kinetics modeling, which is commonly used in biohythane production to improve or analyse the effect, relationship, and function of the parameter, as well as to investigate the performance of biohythane during the process. These kinetic models provide a variety of functional goals depending on the experiment's objective, such as determining the kinetics of cell growth, describing the effect of different operating parameters on biohythane production, studying substrate utilisation and inhibition, and product formation. All models are classified in a table by their equation for further reference.","PeriodicalId":15706,"journal":{"name":"Journal of Energy and Safety Technology (JEST)","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89711889","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}

{"title":"Carbon Footprint of An Offshore Survey by Oil and Gas Service Provider Company","authors":"Cai Hui Lam, Mimi H. Hassim, Ho Wai Shin","doi":"10.11113/jest.v5n2.116","DOIUrl":"https://doi.org/10.11113/jest.v5n2.116","url":null,"abstract":"The rapid development of global economy has leaded to climate change issues. The greenhouse gases including carbon dioxide have driven the issues of climate change and become one of the concerns confronting human society. An offshore survey project that carried out by a service provider company in oil and gas industry was chosen for the carbon footprint estimation during the project’s operation in this study. The major objective of this study is to calculate the carbon footprint of the above-mentioned project in terms of CO2, eq and use it as a benchmark or reference for the company, as well as to create an Excel Tool that can be used as a carbon footprint calculator. Greenhouse Gas Protocol methodology is to generate the framework for the project in this study. There have three unavoidable sources: fuel combustion by survey vessel, transportation involved and water consumption during the operation of the project. The emission factors approach is used in this study to quantify the emission of GHGs from the project. Emission factor values will be obtained from the published report that revised by Federal Register of Legislation in 2020. The carbon footprint of the project was calculated to be 130.44 tons of CO2, eq. Scope 1 accounted for 96.05% of the carbon footprint, which comprised fuel combusted by survey vessel.","PeriodicalId":15706,"journal":{"name":"Journal of Energy and Safety Technology (JEST)","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87044550","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}

{"title":"Concerns of Airborne Ammonia in Ice-Production Facilities: Enhancing protection of workers in Malaysia.","authors":"Hazlina Yon","doi":"10.11113/jest.v5n2.132","DOIUrl":"https://doi.org/10.11113/jest.v5n2.132","url":null,"abstract":"A study on profiling of ammonia concentration and its validation using two types of direct reading instruments has been conducted for eight months from September 2021 till May 2022 in four different zones in West Malaysia. The study is using a high performance multigas analyzer integrated with Fourier Transform Infrared (FTIR) and Multirae data analyzer to measure ammonia concentration in thirty-eight ice-production facilities in Malaysia. This study is limited to databases of ice-production facilities registered with the Department of Occupational Safety and Health (DOSH) Malaysia. The study involves thirty-eight ice-production facilities with fourteen compliance verification using USECHH checklist. The results of monitoring and validation confirmed that ammonia is detected at various locations in the factory layout. It is found to be localized and concentrated at the machine room followed by machine room combined with production room.  Both instruments seem to show similar trend which can validate the profile obtained for ammonia in the ice facilities. Recommendations are suggested for employers to improve layout of the ice-production facilities based on these measurements. \u0000The study also seeks to find a correlation between the compliance of these facilities with the Use and Standards of Exposure of Chemicals Hazardous to Health (USECHH) Regulations 2000 and compliance with ammonia checklist from the Guideline of Safe Management of Ammonia Refrigeration System 2020. Pre and post assessment is conducted using the same ammonia checklist to identify any gap. It was found that the results obtained for the USECHH compliance, ammonia checklist compliance either pre or post assessment are not positively correlated. This finding emphasizes that there is still a lack of commitment from these ice-production facilities even after the visits by authorities. Comparison between the monitoring data and the degree of compliance using ammonia checklist from the said guideline was also made. The results obtained emphasize that there is no strong correlation between the monitoring data and the degree of compliance using the ammonia checklist. \u0000            This study shows an insight of chemical management in Malaysia at ice-production facilities and provides suggestions, recommendations, measures and outcomes of enforcement. Future measures to be taken is also suggested to boost compliance. At the same time, the outcomes and implications of this study on chemical management and chemical safety status in Malaysia can also assist other developing countries to improve their chemical management. Future research with risk modelling of ammonia leakages could also be ventured into. Ice plants are recommended to redesign their layout based on this study. \u0000Keywords: ammonia profiling, compliance enforcement, ice production facilities, lack of commitment, USECHH compliance.","PeriodicalId":15706,"journal":{"name":"Journal of Energy and Safety Technology (JEST)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81945855","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}