Richard Nico Lumanauw, P. Ng, A. Saptari, I. Halim, M. Toha, Y. J. Ng
{"title":"Performance Evaluation of Subcontractors Using Weighted Sum Method through KPI Measurement","authors":"Richard Nico Lumanauw, P. Ng, A. Saptari, I. Halim, M. Toha, Y. J. Ng","doi":"10.33093/jetap.2023.5.1.4","DOIUrl":"https://doi.org/10.33093/jetap.2023.5.1.4","url":null,"abstract":"Key Performance Indicators (KPIs) help measure objectives critical to business sustainability. This research takes place in a toy factory’s injection moulding department that has yet to develop indicators for subcontractor performance. Poor subcontractor performance significantly impacts the injection moulding production. In the last three months, the delivered quantity exceeded the target by 27%, delivery time consistency is only 78%, there were 1.31% rejects, and inventory accuracy and material efficiency were 81% and 93% respectively. The objective of the study is to determine the KPI and develop an evaluation procedure for the injection moulding supplier and select the best supplier. Multi-criteria decision-making, i.e., weighted sum method, was used. Five employees were involved in determining the criteria weights. The evaluation was based on each supplier’s performance. A written KPI for the company's subcontractor and performance evaluation procedures were developed. There were six subcontractors of which subcontractor H received the highest score (78.42) and subcontractor G received the lowest score (69.42). The subcontractor performance needs to be improved in the future. In the interest of the company’s sustainability, it is recommended that this subcontractor performance evaluation be institutionalised to support subcontractor performance. Successful subcontractors support the business performance.","PeriodicalId":441201,"journal":{"name":"Journal of Engineering Technology and Applied Physics","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123169737","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":"Enhanced InP-based Gunn Diodes with Notch-d-doped Structure for Low-THz Applications","authors":"Siti Amiera Mohd Akhbar, K. Choo, D. Ong","doi":"10.33093/jetap.2023.5.1.1","DOIUrl":"https://doi.org/10.33093/jetap.2023.5.1.1","url":null,"abstract":"In this work, Monte Carlo simulation is performed for InP Gunn diode with a notch-d-doped structure. It is found that the presence of the d-doped layer has improved the Gunn diode performance significantly as compared to the conventional notch structure. The d-doped effect caused an increment in the fundamental operating frequency and current harmonic amplitude in InP Gunn diodes by modifying the electric field profile within the device. An InP notch-d-doped Gunn diode with device length of 800 nm under 3V DC bias is capable of producing AC current signal of 287 GHz, reaching the THz region, with its harmonic amplitude being 5.68×108 A/m2. It is observed that InP-based notch-d-doped Gunn diode is able to generate signals at a higher operating frequency with a larger output power as compared to that of GaAs due to the higher electron drift velocity and threshold field in InP material.","PeriodicalId":441201,"journal":{"name":"Journal of Engineering Technology and Applied Physics","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126313466","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":"Performance Analysis of Partial Shading Effect on PV Plant","authors":"Su Leit Naing, A. Mon","doi":"10.33093/jetap.2023.5.1.5","DOIUrl":"https://doi.org/10.33093/jetap.2023.5.1.5","url":null,"abstract":"Partial shading of PV plants mitigate the maximum power generation of solar modules. As a result, the power output is lower than expected. It is affected not only by the number of shaded modules but also by the shaded patterns. This paper examined a PV plant rated at 15 kW connected in series-parallel for various shading patterns, such as row-wise and column-wise partial shading. This solar plant's behavior is also investigated under various irradiation levels and degrees of shading. The number of solar modules required for this plant was also evaluated. The performance results of solar modules under partial shading conditions, such as power, voltage, and current, are revealed by using the Matlab/Simulik model. From the analysis, the result shows that the column-wise shading condition generates more power output than the row-wise shading condition.","PeriodicalId":441201,"journal":{"name":"Journal of Engineering Technology and Applied Physics","volume":"15 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120992872","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":"Feasibility of Use of Second Life Electrical Vehicle Batteries in Data Centres in Malaysia","authors":"Abdulla Mubaah, Siva Priya Thiagarajah","doi":"10.33093/jetap.2023.5.1.2","DOIUrl":"https://doi.org/10.33093/jetap.2023.5.1.2","url":null,"abstract":"It is estimated that the cumulative of Electric Vehicles (EVs) will reach 85 million by 2030. EV batteries that have degraded to 80% of their initial capacity no longer provide the required efficiency for EV, resulting in an increasing amount of batteries being discarded and stored in warehouses instead of being recycled. The cost of this storage after its End of Life (EOL) adds to the initial cost of the EV. There is amounting environmental pressure to re-purpose these discarded batteries in other applications, such as energy arbitrage and peak shaving, such that the initial cost of the EV be reduced. This work presents a feasibility study that allows discarded EV batteries to be repurposed batteries to provide peak shaving in a mid-tier data centre with an area size of 465 m2. A comparison of the cost during peak hours shows that the repurposed batteries can be used as a reliable power supply source to reduce the reliance of data centres on grid power during peak hours. Results showed that the use of these repurposed batteries also achieved a higher cost savings as compared to using brand new Lithium Ion battery over a period of 10 years. A reliability study also shows that the repurposed battery system and brand new battery system performs at par, when the data centre draws power from the grid during peak hours. The study concludes that power supply system in data centres that uses repurposed batteries to achieve peak shaving is a cost effective, green solution that should be implemented. In the larger picture, the reusability of the EV batteries is expected to reduce the initial price of the EV cars, allowing a larger market penetration and thus ensuring the sustainability of the EV car industry. Reusing the stored batteries also reduces environmental issues related to Lithium mining for brand new batteries, such as mining pollution and fresh water shortage.","PeriodicalId":441201,"journal":{"name":"Journal of Engineering Technology and Applied Physics","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123253359","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}
Steven Yong Choong Hong, C. C. Kang, Jian Ding Tan, Mohammad Mehdi Ariannejad
{"title":"Smart Parking System Using IoT Sensors","authors":"Steven Yong Choong Hong, C. C. Kang, Jian Ding Tan, Mohammad Mehdi Ariannejad","doi":"10.33093/jetap.2023.5.1.7","DOIUrl":"https://doi.org/10.33093/jetap.2023.5.1.7","url":null,"abstract":"Due to the increasing difficulty of finding vacant parking slots in urban cities, Smart Parking System has been developed to solve the problem. It is a system that can show the status of all parking slots in an area which allows drivers to find parking easily. The objective of this paper is to design a Smart Parking System by using Internet of things (IoT) sensors and evaluate the system’s performance. In this paper, ultrasonic sensors will be used as the IoT sensors while the microcontroller of the system is the NodeMCU ESP8266. The ultrasonic sensors will be placed in each parking slot to detect the presence of a vehicle. When the sensor detects a car, it will send this information to the microcontroller and the microcontroller will update the parking data stored in the cloud server via an internet connection. The users can then access the parking information in the cloud with their mobile devices by scanning the Quick Response (QR) code provided or directly visiting the cloud online. In addition, unique designs are proposed to solve some common problems faced by the parking systems such as the ultrasonic sensor might be malfunctioning and the sensor is unable to differentiate between a vehicle and a pedestrian. The performance of the system will then be evaluated based on its accuracy. From the results obtained, the system prototype achieved an accuracy of 100 %. Comparing this system with other Smart Parking Systems proposed, it proves that this method has higher cost-efficiency and reliability. This shows the significance of this research since higher system reliability and cost-efficiency can increase the confidence of the parking area owners to implement this Smart Parking System which can save the driver’s time and reduce air pollution.","PeriodicalId":441201,"journal":{"name":"Journal of Engineering Technology and Applied Physics","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127156402","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}
Amirul Hakim Saifulezam, Khairul Ikhwan Mohamad, Nor Azlina Ab. Aziz
{"title":"Optimizing Vaccine Distribution Using Sine Cosine Algorithm with Mutation","authors":"Amirul Hakim Saifulezam, Khairul Ikhwan Mohamad, Nor Azlina Ab. Aziz","doi":"10.33093/jetap.2022.4.2.2","DOIUrl":"https://doi.org/10.33093/jetap.2022.4.2.2","url":null,"abstract":"Vaccination is the best approach in curbing the spread of a pandemic. However, during pandemic one of the challenge is limited number of vaccine due to limited manufacturing capacity and high demand. Therefore, optimal vaccine distribution is needed to ensure maximum effectiveness in decreasing the total infections in the population. In this paper, the vaccine distribution is optimized using sine cosine algorithm improved with mutation (SCAmut). The SEIR model of H1N1 pandemic in 2009 is used as the case problem here. The effectiveness of SCAmut vaccine deployment is studied using two factors, which are vaccine coverage percentage and vaccine releasing time. The algorithm's result is compared with three traditional methods and original SCA without mutation. The findings suggested that the proposed SCAmut is able to provide more effective vaccination distributions better than the three traditional methods and also the original SCA.","PeriodicalId":441201,"journal":{"name":"Journal of Engineering Technology and Applied Physics","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124268008","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":"Voice Control Smart Home Electrical Appliances for Visually Impaired Person","authors":"Swee Chuan Wang, Wai Kit Wong, Thu Soe Min","doi":"10.33093/jetap.2022.4.2.3","DOIUrl":"https://doi.org/10.33093/jetap.2022.4.2.3","url":null,"abstract":"This paper proposed a voice control based smart home electrical appliances for visually impaired person. This voice control smart home system decreases the time taken for visually impaired person to control their home electrical appliances by giving specific voice command compared to traditional switch or remote control. Besides, the voice control smart home system also contained a mini speaker to provide a feedback audio and ensure the correct electrical appliances were controlled. The implementation of this voice control smart home system provides a more convenient and efficient way for visually impaired person to control their electrical appliances. An experiment was conducted by 50 participants to collect the data of the accuracy of the developed system with testing 100 times voice commands for each participants. The participants achieved 96.74 times correctly on average, with the accuracy 96.74% on this system. 79.33% of the participants agree or strongly agree that would use this system in the future for controlling their home electrical appliances.","PeriodicalId":441201,"journal":{"name":"Journal of Engineering Technology and Applied Physics","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128022672","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":"A Cost Efficient Contactless IoT based Body Temperature Detection System","authors":"A’risya A’ina Abdullah, C. Lee, Kah Yoong Chan","doi":"10.33093/jetap.2022.4.2.4","DOIUrl":"https://doi.org/10.33093/jetap.2022.4.2.4","url":null,"abstract":"In the recent outbreak of Covid-19 pandemic, various methods has been adopted to prevent and control the wide spread of pandemic. One of the commonly used method is by detecting the body temperature. This is to isolate those obtained higher body temperature who are possibly infected with the virus. Body temperature detection device is commonly deployed at the entrance of merchants for this purpose. However if one person is detected in one merchant with higher body temperature, this information is not bundled with his/her identity information. Therefore his/her entranced to other merchants are not linked and warned, and causing a possible spread of pandemic if other customers who appeared in the same premises are not being notified. In this work, an IoT based body temperature detection system is developed. In this system, the body temperature data is obtained and sent to the internet cloud together with the identity information of that person. This allow easy tracking of the potential virus infected person. The collected data can be further analysed using online analysis tool. Furthermore, the identity information is obtained using QR code which eliminate the ordinary procedure of writing personal data into logbook. The QR code method is contactless and able to avoid the infection of virus through the contact of pen and logbook. This system is developed with low-cost material and is affordable for small merchants.","PeriodicalId":441201,"journal":{"name":"Journal of Engineering Technology and Applied Physics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116476369","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":"Optical, Electrical Properties and Surface Morphology of Thermal Evaporated Zinc Telluride (ZnTe) Thin Films for Photovoltaic Applications","authors":"R. Babatunde, R. Odunaike","doi":"10.33093/jetap.4.2.1","DOIUrl":"https://doi.org/10.33093/jetap.4.2.1","url":null,"abstract":"ZnTe bilayer thin films were deposited onto soda-lime glass by a thermal vacuum evaporation technique using the NANO 36 thermal evaporator under a vacuum pressure of 2.9 x 10-5 torr. The optical characteristics of the film were measured using an AVANTEX UV spectrophotometer in the wavelength range from 239.534 nm to 999.495 nm. Also, the electrical characteristics of the thin films were investigated using KEITHLEY four-point probe techniques. The investigation of the optical properties of the thin films as-deposited and annealed at different temperatures showed high transmission in the NIR region with good absorption in the visible and UV regions. The extrapolated band gap energies were 2.60 eV and 3.20 eV for annealed and as-deposited samples, respectively. electrical resistivity decreased as the annealing temperature increases. The images of the film as-deposited and on annealing have a uniform distribution on the glass slides.","PeriodicalId":441201,"journal":{"name":"Journal of Engineering Technology and Applied Physics","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115271221","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":"Authentication for 5G Mobile Wireless Networks","authors":"Daphne Bunga Dwiputriane, Swee Huay Heng","doi":"10.33093/jetap.2022.4.1.3","DOIUrl":"https://doi.org/10.33093/jetap.2022.4.1.3","url":null,"abstract":"Discussions regarding 5G mobile wireless networks frequently involve the impact they will create to our daily lives. Some view 5G as a disruption while some are questioning the need to deploy the network when conventional mobile networks are still performing optimally. The economic and lifestyle impact of 5G is rather subjective, but it is definite that there will be consequences to the security and privacy discussion sphere with an emphasis on authentication. As it arrives with new mechanisms, there is certainly a whole new attacking avenues to be capitalised. This paper surveys the state of 5G mobile wireless networks in terms of authentication. It further discusses the security features and challenges in the 5G mobile wireless networks, and future directions will also be charted.","PeriodicalId":441201,"journal":{"name":"Journal of Engineering Technology and Applied Physics","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115279218","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}