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All Journal Pendas : Jurnah Ilmiah Pendidikan Dasar ASEAN Journal for Science and Engineering in Materials
Daffa, Muhammad Naufal
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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Teaching concept of bio-battery material: Use of Sweet Potato Peels and Lime Juice Solution Maulida, Rahma; Daffa, Muhammad Naufal; Nadhira, Shafwa Faza; Hotimah, Alin Parliana; Anggraeni, Sri; Nandiyanto, Asep Bayu Dani; Sudarjat, Hadi
ASEAN Journal for Science and Engineering in Materials Vol 1, No 2 (2022): AJSEM: Volume 1, Issue 2, September 2022
Publisher : Bumi Publikasi Nusantara

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Abstract

Wasted sweet potato peel waste is a classic problem in Indonesia, therefore the use of sweet potato peel as biomass for bio-battery production can be used as a solution to this problem. This study aimed to determine the benefits of sweet potato peels and orange solution as biomass for bio-battery production. The main novelties in this study are (1) Used sweet potato peels as bio-battery Material that have never been used in previous studies. (2) Used sweet potato peel as fixed variable and lime juice as independent variable, and (3) Tested the sweet potato peel and lime juice pasta into the clock. This method is done by smoothing the skin of the sweet potato with the addition of 40 mL of lime solution to form a paste. The lime solution used in this study was 0; 5; 10; 15%. Then measure the voltage of the bio-battery and test the wall clock with the bio-battery. The experimental results showed that the sweet potato peel paste with a lime solution produced the same voltage as an ordinary battery at a concentration of 10% with a value of 1.47 V. The bio-battery with the highest concentration variation is not necessarily the best, that's because the pH value affects the current and voltage. The conclusion of this research is that sweet potato peel and lime solution can be used as electrolytes in bio-battery production with optimal variation of 5 and 10%. This study demonstrates the utilization of sweet potato peel waste as an alternative biomass for bio-battery production.
PROSES PERANCANGAN LOGO HUT KE-43 KOPINDOSAT SEBAGAI MEDIA KOMUNIKASI VISUAL BRANDING PERUSAHAAN Daffa, Muhammad Naufal; Rahmawati, Alfi
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 02 (2026): Volume 11 Nomor 02, Juni 2026 Published
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i02.53267

Abstract

This study examines the design process of the 43rd Anniversary logo of Kopindosat as a visual communication medium. The study was motivated by the need for a visual identity capable of representing the company's values, journey, and aspirations through an effective and meaningful design. The objective of this study was to describe the stages of the logo design process and analyze the visual meanings embedded in its design elements. The research employed a qualitative descriptive approach using observation, active participation, interviews, literature study, and data triangulation. Data were collected during an internship program at the Corporate Communication Division of Kopindosat. The findings indicate that the logo design process was conducted systematically through brainstorming, concept development, visual exploration, digitalization, evaluation, revision, and finalization stages. The visual analysis revealed that the number “43” was developed using symbolic forms representing direction, growth, adaptability, continuity, and openness. The gradient color combination of blue, light blue, yellow, and orange conveys professionalism, innovation, optimism, and sustainability. Meanwhile, the use of a bold sans-serif typeface strengthens the modern, professional, and readable character of the logo. Overall, the logo design demonstrates the application of visual communication principles through the integration of form, color, and typography to create a meaningful and communicative visual identity.
Co-Authors Asep Bayu Dani Nandiyanto Hotimah, Alin Parliana Nadhira, Shafwa Faza Rahma Maulida, Rahma Rahmawati, Alfi Sri Anggraeni Sudarjat, Hadi