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All Journal Jurnal Inovator JURNAL LENTERA BISNIS GANDRUNG: Jurnal Pengabdian Kepada Masyarakat JOURNAL SCIENTIFIC OF MANDALIKA (JSM) Basic and Applied Nursing Research Journal DEVELOPMENT : Journal of Community Engagement Proceeding of International Conference Health, Science And Technology (ICOHETECH) Health Care : Journal of Community Service Jurnal ATMOSPHERE
Sudiro
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Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Energy Engineering Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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PEMANFAATAN KULIT BUAH SEEBAGAI PUPUK CAIR DENGAN VARIASI SUMBER GULA DAN KONSENTRASI EM4 Septiansah, Yoga Ferdy; Kurniawan, Wahyu; Sudiro; Rahman, Nanik Astuti
jurnal ATMOSPHERE Vol. 6 No. 2 (2025): ATMOSPHERE
Publisher : Teknik Kimia ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/atmosphere.v6i2.16958

Abstract

Liquid organic fertilizer is one type of fertilizer that is widely circulated in the community which is produced from the fermentation of leaf waste or animal waste. This study aims to utilize fruit waste as a production material for making Liquid Organic Fertilizer (POC), in addition to determining the effectiveness of variations in sugar sources and EM4 concentrations on the quality of the POC produced. The production process of liquid organic fertilizer in this study used types of sugar with variations of granulated sugar, brown sugar, mixed sugar (granulated sugar + brown sugar) and without sugar and EM4 bioactivator concentrations of 10%, 20%, 30%, 40% and 50%. The results obtained from the nitrogen analysis ranged from 0.1-0.3 which when associated with the SNI POC did not meet the standard. Liquid organic fertilizer was obtained from testing the phosphorus content in 30% brown sugar, which was 0.00931. While the best potassium content analysis results were found in the EM4 10% granulated sugar variation sample with a result of 0.30%.
Effect of Power Percentage and Cutting Speed on Tensile Stress Values in Laser Cutting Processes saputra, onery; Nurharyanto , Anwar; Sudiro
Jurnal INOVATOR Vol. 6 No. 2 (2023): Jurnal INOVATOR
Publisher : LPPM Politeknik Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37338/inovator.v6i2.261

Abstract

This research was conducted to determine the tensile stress of an object that was cut using a laser cutting machine. The purpose of this study is to determine the strength changes in the workpiece caused by cutting using laser cutting based on power and cutting speed. The workpiece used in this study is a polymer type Polymethylmethacrylate (PMMA) or better known as acrylic. This study uses variations in the amount of power and cutting speed, namely 50% power with a cutting speed of 5 mms, 50% power with a cutting speed of 10mms, 70% power with a cutting speed of 5 mms and 70% power with a cutting speed of 10 mms. From the results of tensile stress testing, the amount of power and speed of acrylic cutting affects the tensile stress of the workpiece. The greater the acrylic cutting power will reduce the tensile stress value of the workpiece by 11.4%. The faster the acrylic cutting will reduce the tensile stress value by 10.7%.
Co-Authors Arif Surono Arifin Oktabrian Febriana Sartika Sari Gultom, Ayub Juliani Wairata Kasim Samosir, Rasi Liddini, Laily Nanik Astuti Rahman Nita Enjellina Nurharyanto , Anwar Rahmadhani, Suci Nur Ratna Wirawati Rosyida Restu, Tuhu Saputra, Onery Andy Septiansah, Yoga Ferdy Seto, D.B. Sherina Putri Nuswantoro SUNARTO T. Simbiak, Irja Tommi Wahyu Kurniawan