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Engineering Science Letter
Published by Indonesian Institute of Science and Technology Research
ISSN : 29618924     EISSN : 2961872X     DOI : https://doi.org/10.56741/esl.v1i02
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology
Engineering Science Letter is an international peer-reviewed letter that welcomes short original research submissions on any branch of engineering, computer science, and technology, as well as their applications in industry, education, health, business, and other fields. Artificial intelligence, image processing, data mining, data science, bioinformatics, computational statistics, electrical engineering, electronics engineering, telecommunications, hardware systems, industrial automation, industrial engineering, fluids and physics engineering, mechanical engineering, chemical engineering, and their applications are among the engineering and computer science topics covered by the journal. All papers submitted will go through a peer-review process to ensure their quality. Submissions must contain original research and contributions to their field. The manuscript must adhere to the author’s guidelines and have never been published before.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 5 Documents
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Search results for , issue "Vol. 2 No. 03 (2023): Engineering Science Letter" : 5 Documents clear
Leveraging Value Chain Analysis to Drive Growth in the Muslim Fashion Industry: A Small and Medium Enterprise Strategy Case Study Silitonga, Roland Y.H.; Setiawati, Marla; Triutami, Eunike Novana; Indriati, Ellen
Engineering Science Letter Vol. 2 No. 03 (2023): Engineering Science Letter
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/esl.v2i03.398

Abstract

This article presents a comprehensive case study that utilises value chain analysis to analyse and develop strategies for small and medium enterprises (SMEs) operating in the Muslim fashion industry. The research addresses critical challenges facing SMEs in accessing the final market and proposes strategic solutions for all stakeholders involved in the value chain. The study adopts Kaplinsky's value chain analysis approach, complemented by quantitative tools such as SWOT and Diamond Competitiveness Analysis. The findings reveal that SMEs encounter four significant barriers to accessing the final market: economies, product characteristics, heavy promotion and advertising, and trading barriers. These barriers pose significant challenges due to internal limitations within the organisations. With these obstacles, a multifaceted strategy is proposed. The proposed plan includes the following key initiatives: (1) Segmentation of the target consumer base to optimise services, thus maximising penetration; (2) Strengthening collaborative partnerships between different actors within the value chain to enhance overall competitiveness; (3) Implementation of targeted promotion and communication programs to improve customer satisfaction and brand visibility; (4) Establishment of a comprehensive data recording system to streamline business processes and improve tactical decision-making; and (5) Investment in technological advancements within the production process to enhance product quality. By implementing these strategies, SMEs can effectively address the identified barriers and unlock their growth potential within the Muslim fashion industry. This case study contributes to the existing body of knowledge by providing practical insights and recommendations for SMEs operating in the Muslim fashion sector. The findings can guide policymakers, industry practitioners, and researchers in formulating effective strategies to foster growth and sustainability in this dynamic industry.
Initial Finding of Material Flow Analysis of Food Waste of Particular Restaurants in Yogyakarta, Indonesia Budijati, Siti Mahsanah; Setiyawan, Panji Dwi
Engineering Science Letter Vol. 2 No. 03 (2023): Engineering Science Letter
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/esl.v2i03.415

Abstract

Food waste is still a significant problem today. The Special Region of Yogyakarta contributes 96 tons of food waste daily, with the City of Yogyakarta being the most significant contributor. Food industry services in DIY experience a rapid increase every year. Meanwhile, restaurants and restaurants are the most important contributors to food waste. Yogyakarta City DLH has carried out food waste management activities such as waste bank activities. However, many business actors still need to cooperate, which has resulted in food waste ending up in landfills. Efforts are required to manage food waste to overcome this problem. So, it is necessary to conduct research on food waste flow analysis in food service businesses in Yogyakarta. This research aims to determine the type and quantity of food waste produced and provide an overview of the management costs that occur in restaurants. This research uses the material flow analysis (MFA) method by identifying material flow processes so that it can explore the quantity and type of food waste that occurs at the pre-kitchen, kitchen and post-kitchen stages using STAN software and Sankeymatic diagrams and providing an overview of the total costs in food waste management in restaurants. Interviews and direct observation of restaurants in the eastern and southern regions of Yogyakarta City collected data. The analysis carried out is the flow, type and quantity of food waste and the costs incurred in managing food waste in restaurants. The research results in 8 restaurants in Yogyakarta City in the eastern and southern regions showed that total food waste was 617,906 grams/week. The most significant percentage of food waste at the pre-kitchen stage is lime peel (34%), at the kitchen stage is oil (86%) and at the post-kitchen stage is fish bones (30%). The total costs of managing restaurant food waste are IDR 18,615,000.00/month. The results of this research can be used to predict the quantity and type of food waste in the future so that it can be used to plan policies to overcome food waste.
Power Distribution Transformer Faults Diagnostic Skills: Case study at Electrical Engineering Technology Students of Polytechnics in North-East Nigeria Medugu, Jimritu Dunama; Zambwa, Joseph; Bashir, Mohammed; Ibanga, Isaac John
Engineering Science Letter Vol. 2 No. 03 (2023): Engineering Science Letter
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/esl.v2i03.429

Abstract

This study determined the power distribution transformer faults diagnostic skills needed by Electrical Engineering Technology students of polytechnics in North-East Nigeria. Three research questions and hypotheses guided the study, employing a descriptive survey research design. The study population was 144, comprising 135 Electrical Engineering Technology Lecturers, 3 Power Transformer Maintenance Technicians and 6 Electric Power Distribution Company-Based Supervisors. The entire population was used. Hence, there was no sampling. The instrument used for data collection was a structured questionnaire titled Power Distribution Transformer Faults Diagnostic Skills Questionnaire (PDTFDSQ) developed by the researchers. Three experts validated the instrument, and a reliability of 0.74 was obtained using the Cronbach Alpha reliability method. The mean statistic was used to answer the research questions, while ANOVA was used to test the null hypotheses of the study at a 0.05 level of significance. The study’s findings revealed that the Electrical Engineering Technology students of polytechnics in North-East Nigeria required fault diagnosis (troubleshooting) skills, ICT skills and safety skills. The study recommended that the Department of Electrical Engineering Technology in all polytechnics should endeavour to expose students to faulting-finding activities so that students of Electrical Engineering will acquire fault diagnosis (troubleshooting) skills for maintaining power distribution transformers.
Study of Complexation Behaviour of Lignite Extracted Humic Acid with Some Divalent Cations Iqbal, Pervez; Aftab , Kiran
Engineering Science Letter Vol. 2 No. 03 (2023): Engineering Science Letter
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/esl.v2i03.431

Abstract

In biogeochemical cycles, humic substances are natural electron shuttles in transforming nutrients and environmental pollutants. Humic acid complexes with macro and micronutrient metals are eco-friendly organo-mineral fertilisers. This study prepared and characterised lignite-extracted humic acid-metal (Fe, Mg, Zn) complexes. The proximate analysis exhibited the moisture, volatile matter, ash and fixed carbon contents of extracted humic acid of 02.61%, 17.31%, 57.18% and 22.90%, respectively. The percentage of metal ions in humic acid complexes ranges from 3.5-7.25%. The FTIR analysis of coal-extracted humic acids-metal complexes showed Zn, Mg and Fe ions complexed in a bidentate manner predominantly with the carboxylic acid moiety of humic acid. Thermal gravimetric analysis indicated a higher value of humic acid decomposition than their metal complexes. The thermal stability observed order is HA- Zn >HA-Fe>HA- Mg. The X-ray diffraction pattern pointed toward the noncrystalline nature of humic acid and their respective complexes due to having few intense and small diffuse peaks in the 2θ range from 0 to 80°. Hence, the humic acid-metals complexes increase the soil humic content and the availability of essential nutrients that enhance the loam's biotic action.
A Low-cost Pitot Tube-based Experimental Model for Active Teaching-learning of Applied Fluid Mechanics: A Demonstration from NTTU Chau, Than; Nguyen, Huong; Ly, Hung; Ghazali, Ihwan; Nguyen, Duy; Nguyen, Tho
Engineering Science Letter Vol. 2 No. 03 (2023): Engineering Science Letter
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/esl.v2i03.432

Abstract

Using hands-on experiments in the classroom is a highly effective way to deepen students' understanding of theoretical concepts. By researching and developing a practical and cost-effective experiment using a pitot tube, we can transform the teaching of fluid mechanics from a content-based approach to one that promotes competency and practical application. The research includes exploring pitot tube theory, developing and evaluating the experimental design, simulating flow through the designed pitot tube using computational fluid dynamics simulation software, and implementing and evaluating learner satisfaction. The feedback we received from the students showed high satisfaction with the practical equipment used in the classroom and confirmed that this hands-on approach helped them achieve their learning objectives.  

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