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All Journal Journal of Business and Management Sinergi Polmed : Jurnal Ilmiah Teknik Mesin Makara Journal of Technology Jurnal Cakrawala Bahari
Albana, Muhammad Hasan
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Food Waste Management Feasibility Study in Hotel X Albana, Muhammad Hasan; Handayati, Yuanita
Journal of Business and Management Vol 9, No 2 (2020)
Publisher : Journal of Business and Management

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Abstract

Abstract. This paper aims to find out the problems that faced by 1000Kebun and help them in implementing food waste management for the Hotel X. Hotel X is a 5 star hotel located in Bandung, Indonesia with good reputation and experience in hotel industry. Most of Hotel X wastes are food waste and several Hotel X staffs realized that they have to conduct food waste management to have their own waste management system. However, they have zero experience in waste management, therefore they will conduct cooperation with 1000Kebun, one of organic community in Bandung. Since this will be the first time for 1000Kebun to implement food waste management, they faced several problems in structuring the business, detailing the food waste management process, and calculating the worth of investment for implementing food waste management. The results from this paper are the detailed business process of Hotel X using Business Process Modelling Notation (BPMN), cost benefit analysis using Net Present Value and Payback Period, and Hotel X food waste management business model canvas.Keywords: Business Process, Business Model Canvas, Business Process Modelling Notation, Cost Benefit Analysis, Food Waste Management.
Conversion of Heat Energy from Cooling Water of Diesel Engine to Electrical Energy Using Thermoelectric Generator Albana, Muhammad Hasan
Makara Journal of Technology Vol. 22, No. 3
Publisher : UI Scholars Hub

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Abstract

This research objective is to convert heat from the radiator fluid of a diesel engine to electrical energy by utilizing a thermoelectric generator (TEG). The TEG consists of 20 semiconductors (TE modules) and is equipped with a heat sink. The research shows that using the TEG, the heat of radiator fluid can be converted to electrical energy, although the electricity generated is small. The maximum electrical voltage generated by the TEG when modules were connected in series was 10 volts. When the TE modules were connected in parallel and series-parallel, the maximum voltages generated were 2.11 and 2.53 volts, respectively. The maximum electric current generated by the TEG when the modules were connected in series-parallel was 128 mA. When the modules were connected in series and parallel, the maximum electrical currents generated were 108.3 and 69.7 mA, respectively. The series circuit is the best choice for the TEG because it produced the highest electrical power. The TEG efficiency in this study was 5%–7.1%. The voltage and electric current generated by the TEG will be higher if the temperature difference between the hot and cold sides of the semiconductor is higher. The use of this TEG did not reduce the performance of the test engine cooling system or radiator system.
PEMODELAN DAN ANALISIS EYEBOLT TERHADAP BEBAN DAN SUDUT ANGKAT MENGGUNAKAN FINITE ELEMENT ANALYSIS Fathurrahman; Widiastuti, Hanifah; Albana, Muhammad Hasan
SINERGI POLMED: Jurnal Ilmiah Teknik Mesin Vol. 6 No. 2 (2025): Edisi Agustus
Publisher : Politeknik Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51510/sinergipolmed.v6i2.2556

Abstract

Eyebolt berperan sebagai bagian dari komponen pengangkatan peralatan yang dibutuhkan dalam proses pemindahan peralatan berat. Meskipun demikian, eyebolt memiliki potensi kegagalan yang tinggi akibat dari ketidaksesuaian standar sudut pengangkatan yang akhirnya berakibat pada kerusakan eyebolt. Penelitian ini akan memfokuskan kepada analisis pembebanan terhadap eyebolt dari variasi sudut pengangkatan yang diberlakukan. Sehingga penelitian ini diharapkan dapat digunakan sebagai media pembelajaran untuk pengaplikasian Eyebolt dalam aktivitas pengangkatan komponen peralatan berat di kemudian hari. Simulasi Finite Element Analysis (FEA) merupakan metode numerik komputasi untuk mengetahui perilaku suatu material atau struktur ketika diberi pembebanan. Dalam penelitian ini akan mensimulasikan tiga skenario pembebanan dengan variasi sudut berbeda, yaitu 90°, 75°, 45°, dan 30° terhadap Eyebolt Australian Standard 2371:2018 for eyebolt grade 4. Parameter yang diamati dalam penelitian kali ini berfokus pada perbandingan dari faktor deformasi material, factor of safety, tegangan dan regangan yang mempengaruhi aspek kesuksesan pengangkatan.
Implentasi Manajemen Waktu Dan Kehidupan Berasrama Terhadap Kedisiplian Taruna Dalam Dinas Jaga ALBana, Muhammad Hasan
Jurnal Cakrawala Bahari Vol. 8 No. 2 (2025): Jurnal Cakrawala Bahari
Publisher : Politeknik Pelayaran Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70031/jkb.v8i2.165

Abstract

This study was motivated by the importance of discipline among cadets while performing guard duty in a maritime vocational education environment, where time management and dormitory conditions are considered dominant factors influencing disciplinary behavior. The main objective of this study was to evaluate the extent to which time management and dormitory conditions contribute to the level of discipline among cadets while performing guard duty at the West Sumatra Maritime Polytechnic. This study uses an explanatory method with a quantitative approach. All cadets were included in the population, while sampling was conducted randomly to obtain 100 respondents. The main data were collected through a structured questionnaire and analyzed using multiple linear regression, accompanied by validity and reliability tests, F-tests, t-tests, and coefficient of determination analysis. The findings show that time management has a positive and significant effect on cadet discipline, with a regression coefficient of 0.195 and a significance of 0.035. In addition, the dormitory environment also has a significant positive effect, with a regression coefficient of 0.241 and a significance of 0.000. The F test results show a significance of 0.000, indicating that both independent variables simultaneously affect cadet discipline. The adjusted R² value of 0.971 indicates that 97% of the variation in cadet discipline is explained by these two factors, while the remaining 3% is influenced by other factors outside the model. The practical implication is that strengthening time management training and dormitory guidance is very important in shaping cadet discipline.
Co-Authors Fathurrahman Widiastuti, Hanifah Yuanita Handayati