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Journal of Sustainable Technology and Applied Science
Published by Institut Teknologi Nasional Malang
ISSN : -     EISSN : 27222403     DOI : https://doi.org/10.36040/jstas.v1i2
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Energy Engineering Industrial & Manufacturing Engineering
JSTAS (Journal of Sustainable Technology and Applied Science) is the online journal under the Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) ITN Malang. JSTAS ready to publish research articles, a review from the researchers associated with the field of sustainable technology, engineering, and applied science. The journal aims to integrate the study of these disciplines to achieve sustainable development (SD) and help to stimulate debate with a view to defining common, effective responses to tomorrow’s challenges.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 56 Documents
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VENTILATION SHAFT DESIGN IN ENHANCING INDOOR AIR MOVEMENT FOR PUBLIC BUILDING Wahab, Izudinshah Abd; Bakar, Noor Athirah Abu; Amin, Noor Dina Md; Hamberi, Mohd Jamil Mohd
Journal of Sustainable Technology and Applied Science (JSTAS) Vol. 4 No. 1 (2023): Journal of Sustainable Technology and Applied Science, May 2023
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Nasional (ITN) Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jstas.v4i1.8118

Abstract

The conditions of dense built environment, land topography and the needs on having deep-plan buildings seems inevitable nowadays. The situations give a poor impact on building indoor natural ventilation. Therefore, the application of stack ventilation strategy has become more important. This is due to the limitation of natural cross ventilation potential. This paper presents a design proposal strategy based on the research aim to provide a good natural ventilation for a new proposed Waterfront Marina & Club building in Penang. Based on stack effect ventilation strategies as references, the project introduced an atria like ventilation shaft with consideration of the building oreantation based on the site context. As the sea breeze is coming from the East side of the building, the shaft is designed open facing the direction to act as wind catcher before transporting the air movement vertically through the shaft. At lower levels, the air movement is spread to all other spaces connected to the main corridor. The shaft is not only depending on the sea breeze but may also functioned as stack effect throat to move the air vertically due to the difference of air pressure via the levels.
ENHANCED USER EXPERIENCE IN DATA MONITORING VIA MICROSOFT SHAREPOINT AND POWER BI Rashidi, Muhammad Norashid Hakimmi Bin; Salleh, Alia Binti Abdullah; Mokhtar, Seri Bunian Binti; Awang, Mariah Binti; Sari, Kamarul Aini Binti
Journal of Sustainable Technology and Applied Science (JSTAS) Vol. 4 No. 2 (2023): Journal of Sustainable Technology and Applied Science, November 2023
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Nasional (ITN) Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jstas.v4i2.9153

Abstract

The study that was carried out aimed to examine the important and suitable data parameters with workers in facility management fields and to propose a new technique integrating digitalized data for a few facility management companies in Malaysia. The new parameter that was proposed was to use Microsoft SharePoint and Power BI. Microsoft SharePoint offered the ability to track both major and minor document version changes. To enforce versioning and handle changes cleanly, libraries could be set to require users to check documents in and out when making changes to content. Some parameters for Microsoft SharePoint included its ability to run in the cloud with Microsoft Office 365, allowing for easy sharing of content and information across multiple places and devices. On the other hand, Microsoft Power BI simply and effectively designed and showed data analysis and presentations. In addition, it enabled the creation of reports at a fraction of the cost of more conventional systems and with far less rigidity and overhead. Parameters for Microsoft Power BI included choosing the right visualization type, customizing visualization properties, considering custom visualizations, and removing unnecessary elements in high-density reports. The study was conducted using two methods, namely quantitative and qualitative. For the quantitative method, a questionnaire approach was used, with the questionnaire distributed to several employees in the field of facility management in Malaysia. The qualitative method used an interview approach with several employees in the facility management field who were selected based on the questions. After the distribution of questionnaires, it was found that some companies or facility management work fields still used manual methods in recording their data. Some respondents had also used CMMS or advanced software but agreed with the method that had been suggested to them. The result of the first objective was the ability to understand that there were many parameters that were important for data documentation in the FM sector. Regarding the second objective result, it was observed that the majority of respondents who had completed the questionnaire agreed with the idea of proposing a new parameter to integrate digitalized data for a few facility management companies in Malaysia.
ANALYSIS OF THE EFFECT OF USING VIRTUAL TRY-ON BASED ON ARTIFICIAL INTELLIGENCE AND AUGMENTED REALITY ON FACIAL BEAUTY PRODUCTS ON PURCHASE INTENTION WITH ELECTRONIC WORD OF MOUTH AS A MEDIATION VARIABLE (CONSUMER PERSPECTIVE OF E-COMMERCE IN INDONESIA) Fenanda, Zakiah Intan; Triwijayanti, Anna; Wahyono, Seno Aji
Journal of Sustainable Technology and Applied Science (JSTAS) Vol. 5 No. 1 (2024): Journal of Sustainable Technology and Applied Science, May 2024
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Nasional (ITN) Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jstas.v5i1.9344

Abstract

This research aims to determine the effect of Virtual Try On on consumer Purchase Intention mediated by eWOM. The method used in this research is quantitative explanatory research. The population in this research is Indonesian e-commerce consumers who use the virtual try-on feature for facial beauty products, an unknown number of which are unknown. The sample in this study was obtained from the Hair formula in the amount of 10 x the number of questionnaire items, namely 240 people. Data collection used a questionnaire survey with the pick-up survey method. Data analysis uses the SEM PLS (Partial Least Square) analysis technique. The research results show that the Virtual Try On variable has a significant positive effect on eWOM, eWOM has a significant positive effect on Purchase intention, Virtual Try On has a significant positive effect on purchase intention directly and is also mediated by eWOM and the effect is complementary (partial mediation).
DESIGN FOR SIX SIGMA METHOD APPLICATION FOR CONCEPTUAL DESIGN OF MINING INFORMATION SYSTEM PT. KIDECO JAYA AGUNG Parulian, Boy; Ginardi, R.V. Hari; Wijayaningtyas, Maranatha
Journal of Sustainable Technology and Applied Science (JSTAS) Vol. 5 No. 1 (2024): Journal of Sustainable Technology and Applied Science, May 2024
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Nasional (ITN) Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jstas.v5i1.9968

Abstract

Although coal mining business provide a large economic contribution, coal mining operational can have negative impacts if that business don’t implement good mining practice. Therefore, companies need to optimize technology to minimize negative impacts and increase productivity. The problems that have occurred at PT. Kideco Jaya Agung is an information system that is currently implemented is not yet relevant according to the stakeholders expectation. Data error, bugs, and mistake found, so there will be potential for dualism point of view which can impact to fault in decision making. So strategic planning in information system is needed with the aim that the company designs a concept which is effective and has the best quality in accordance with stakeholder needs to support the company's business. The application of Design For Six Sigma (DFSS) is to analyze planning based on stakeholder needs, then the used tools is Software Quality Function Development (SQFD). SQFD tool quantifies user needs and then prioritizes the digitalization project portfolio by mapping all user needs involved in the business process. Design For Six Sigma analysis produces output analysis of stakeholder needs. Based on stakeholder needs, the business processes required to be digitized include Coordination Meetings, Data Analysis, Daily/Weekly/Monthly Reports, Contractor/Subcont Management, and Decision Making which then become a reference in designing data flow diagrams as conceptual design.
ENHANCING CUSTOMER SATISFACTION THROUGH IOT-BASED SMART PARKING SYSTEMS IN SHOPPING MALLS Juhari, Nur Hafizah; Yuki, Goh; Khan, Puteri Ameera Mentaza; Khair, Nurhayati
Journal of Sustainable Technology and Applied Science (JSTAS) Vol. 5 No. 1 (2024): Journal of Sustainable Technology and Applied Science, May 2024
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Nasional (ITN) Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jstas.v5i1.10702

Abstract

An intelligent parking system with IoT technology is vital in shopping mall parking because it enhances convenience and efficiency for shoppers and visitors. The system can assist in reducing several problems that impact the users, such as wasting time finding parking and paying parking fees at the auto-pay machines. Thus, this study examines the components of smart parking systems that affect customer satisfaction levels. The smart payment system, sensor system, navigation system, security system, parking reservation system, and electric vehicle charging system are among the components. Data was gathered via questionnaires from 100 respondents who were at least 16 years old and had experience driving vehicles to shopping malls in Kuala Lumpur. The results from the Relative Important Index indicate that the smart payment system is the most influential component of IoT-based smart parking systems in affecting customer satisfaction at shopping malls. Therefore, the shopping operator, developer, property manager, and future researcher can emphasise the most important elements of the intelligent parking system to enhance management and increase customer satisfaction. In addition, the smart parking system should be implemented in Malaysia to ensure that the parking system has advanced and comprehensive facilities for visitors.
CONSTRUCTION WORKERS' SUBJECTIVE AND OBJECTIVE FATIGUE MEASUREMENT ON MULTISTOREY PROJECT Anthony Jiram, Wilson Rangga; Ismail, Azizah Binti; Tamjehi, Sitti Diana
Journal of Sustainable Technology and Applied Science (JSTAS) Vol. 3 No. 1 (2022): Journal of Sustainable Technology and Applied Science, May 2022
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Nasional (ITN) Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jstas.v3i1.11172

Abstract

Quality, cost, and time are the primary targets of construction projects; the working environment, occupational safety, and health are also crucial. An employer can implement occupational safety and health (OHS) by providing rules and appeals to minimise workplace accidents. Several studies found that workers' stress and fatigue caused workplace accidents. Therefore, this study aimed to investigate workers' fatigue based on subjective and objective measurements using surveys; the researchers distributed questionnaires and measured the pulse of 84 workers in multi-storey building construction projects. The subjective analysis revealed that workers' fatigue reached a total score of 77.81, categorised in level 3 and classified as high fatigue. Meanwhile, the objective analysis proves that workers' pulse rate indicates heavy load work and high fatigue levels. There is a positive but not significant correlation between subjective and objective variables from the Pearson correlation test. Thus, the study concluded that corrective action in implementing occupational health and safety was imperative. In addition, employers need to use work methods to minimise workers' fatigue in construction projects. Investigating fatigue is expected to prevent work accidents in constructing multi-storey buildings.
SAFETY CLIMATE ANALYSIS FACTOR TO IMPROVE OCCUPATIONAL HEALTH AND SAFETY IN CONSTRUCTION WORK AT PT XYZ BUNYU FIELDWORK AREA Zulfani Haki; Achmadi, Fuad; Vitasari, Prima
Journal of Sustainable Technology and Applied Science (JSTAS) Vol. 5 No. 2 (2024): Journal of Sustainable Technology and Applied Science, November 2024
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Nasional (ITN) Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jstas.v5i2.8897

Abstract

The oil and gas industry is a workplace with many sources of danger, such as gas pressure, explosions, fire, electricity, moving equipment, and transportation. Field observations often result in work being stopped due to findings regarding unsafe conditions and unsafe actions in the workplace. Efforts can be made to protect workers' occupational health and safety by creating a safe climate in the workplace. This research aims to provide improvement solutions based on the safety climate factors that are most important in improving occupational health and safety in construction work. This research uses quantitative research methods. The research was conducted at the PT XYZ Bunyu fieldwork area in Bulungan Regency, North Kalimantan Province. The population used was all construction work employees under the supervision of the operation & surface facilities construction department, totalling 200 workers, while the sample was 180 workers. This research uses the Exploratory Factor Analysis method. The safety climate factor analysis results show that the total variance is 86.538%. Four factors were produced: training and compliance for occupational health and safety at 60.58%, leadership, knowledge, and attitude of workers at 15.392%, management commitment and worker initiative at 6.313%, and safety campaign at 4.248%. Implementing the proposed improvements uses one factor, a safety campaign, where observations indicate that field implementation has been carried out well. This research does not analyse the relationship between the influence of safety climate factors on occupational health and safety; the suggestions for further research include examining the relationship between the influence of safety climate factors on occupational health and safety to find out the technical aspects and to apply existing factors directly in the field.
STRATEGY AND IMPLEMENTATION OF SUSTAINING E-CUSTOMER LOYALTY TO SHOPEE USERS IN EAST JAVA Vitasari, Prima; Maziyah, Nurul; Fuad Achmadi; Hadi, Eko Kusuma; Akidin, Lulud; Haki, Zulfani
Journal of Sustainable Technology and Applied Science (JSTAS) Vol. 5 No. 2 (2024): Journal of Sustainable Technology and Applied Science, November 2024
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Nasional (ITN) Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jstas.v5i2.8907

Abstract

The digital economy is growing, especially in the field of e-commerce. Indonesia as one of the countries that has a great opportunity for the growth and development of e-commerce. This research conducted a study on Shopee e-commerce as the most popular marketplace to create strategies and implementations to maintain consumer loyalty. A total of three hundred and ninety-three customers participated in filling out the survey questionnaire. Data collection through surveys using google form for questionnaires. The survey results are used as a reference for making strategies that are then implemented to maintain consumer loyalty at Shopee. Improve and improve service quality, especially in privacy indicators. Responses from consumers show that privacy, responsiveness, and contact are leading indicators that need to be considered in making service improvement strategies. Furthermore, the strategy made is to improve and improve service quality, especially on privacy indicators, with Shopee needing to explain the privacy policy in an attractive visual form such as a slideshow that cannot be skipped every time a user logs in. Responsiveness, Shopee provides convenience for return options that are not suitable, Shopee handles returns well, Shopee offers a guarantee for the goods provided, Shopee tells what to do if my order is not processed, Shopee is able to overcome problems in transactions well. Contact, Shopee should improve service quality by being more responsive and fast to handle customer complaints and questions on social media. The implementation of improvements is recommended to Shopee so that it is better in service and satisfies consumers
NAVIGATIONAL CHOICES IN URBAN CONGESTION: A COMPREHENSIVE ANALYSIS OF PASSENGER RIDE INTENTION TOWARDS MOTOR TAXI SERVICES IN MALAYSIA Abdul Rahim, Fitriya; Tai, Lit Cheng; Goh, Poh Jin; Jaafar Sidik, Morni Hayati
Journal of Sustainable Technology and Applied Science (JSTAS) Vol. 5 No. 2 (2024): Journal of Sustainable Technology and Applied Science, November 2024
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Nasional (ITN) Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jstas.v5i2.10814

Abstract

Motorcycles have become a standard mode of transportation in many countries, including Malaysia, due to their affordability, lower fuel consumption, low maintenance costs, and convenience, given the worsening traffic situation. Hence the idea of motorcycle taxis. This concept is common throughout much of Southeast Asia, but the awareness is a novelty in Malaysia, which has depended on cars to act as taxis for some time. Therefore, Malaysia's'motorcycle taxi service’ push has gathered countrywide interest. This study aims to determine factors influencing passenger ride intention towards motor taxis. Data were collected through self-administered questionnaires and online surveys on 206 respondents. SmartPLS analysis generated findings on perceived price, safety, convenience, accessibility, social influence, and ease of use as significant factors in predicting passenger ride intention. The results revealed that there is a substantial relationship between the perceived price, safety, and perceived accessibility towards the intention to use the motor taxi services. This implies that there is a need for the authorities to come up with a policy that protects passenger safety when using this new type of e-hailing service. This research study offers valuable and essential information for stakeholders to understand the psychological determinants further and address the needs of a special interest group of end-users.
TRANSIENT FREQUENCY STABILITY ASSESSMENT OF THE INTERCONNECTED SOUTH SULAWESI POWER NETWORK Efendi, Khorul Fahmi; Lomi, Abraham; Muljanto, Widodo Pudji; Wartana, I Made; Krismanto, Awan Uji
Journal of Sustainable Technology and Applied Science (JSTAS) Vol. 5 No. 2 (2024): Journal of Sustainable Technology and Applied Science, November 2024
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Nasional (ITN) Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jstas.v5i2.11736

Abstract

The power system consists of interconnected generation, transmission, and load centres, forming a complex electrical network called a grid. One of the significant challenges in power systems is ensuring stability—the system's ability to return to regular or stable operation (steady state) after experiencing significant disturbances such as generation loss, switching operations, sudden load changes, or faults like short circuits. Transient analysis plays a crucial role in determining the appropriate relay operation scheme, critical disconnection time for circuit breakers, and the transfer capability between systems, all of which must be optimised to maintain stability. This study simulates and analyses the frequency transient stability to assess system reliability during disturbances of the 150 kV South Sulawesi interconnected system. The study also determines the Critical Clearing Time (CCT) necessary to achieve the stable conditions of the interconnected system. The simulation is tested on the South Sulawesi interconnected system. The analysis results show frequency drops of about 0.0397% at GI Bantaeng and 0.0401% at the GI Punagaya bus, PLTU Jeneponto 1, and PLTU Jeneponto 2.

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