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All Journal Media Mesin: Majalah Teknik Mesin Jurnal Agrotek Indonesia Indonesian Journal of Police Studies
Prabowo, Bayu Aji
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Agriculture, Biological Sciences & Forestry Law, Crime, Criminology & Criminal Justice Mechanical Engineering Social Sciences

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ANALISA PENGARUH SERAT RAMI DAN FIBERGLASS DENGAN VARIASI BUTIRAN KUNINGAN (Cu-Zn) MESH 40,50,60 TERHADAP NILAI KEKERASAN, KEAUSAN, DAN KOEFISIEN GESEK KAMPAS REM Purboputro, Pramuko Ilmu; Prabowo, Bayu Aji
Media Mesin: Majalah Teknik Mesin Vol 20, No 2 (2019)
Publisher : Program Studi Teknik Mesin, Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v20i2.8533

Abstract

Pada penelitian ini peneliti membuat kampas rem sepeda motor dengan menggunakan bahan komposit serat alam dan serat buatan yang ramah lingkungan dengan beberapa variasi komposisi bahan untuk mengetahui nilai kekerasan, keausan, dan koefisien gesek. Bahan-bahan yang digunakan pada penelitian ini yaitu serat rami, fiberglass, serbuk kuningan mesh 40, 50, dan 60, kalsium karbonat, barium sulfat, dan resin polyester dan katalis sebagai matrik nya. Kemudian kampas rem diuji gesek dengan beban 16 kg selama 3 jam dengan uji kering, air, oli, air garam, dan minyak rem dan kemudian dihitung keausan dan koefisien geseknya, dan diuji kekerasan dengan menggunakan Durometer dengan standar ASTM D2240. Dari hasil pengujian kekerasan didapatkan nilai tertinggi didapatkan pada kampas rem Indopart dengan nilai 86,7 HD, sedangkan kekerasan yang mendekati kampas Indopart didapatkan pada kampas rem variasi mesh 60 dengan nilai kekerasan 84,6 HD. Hasil pengujian keausan menunjukan nilai keausan kampas rem terendah terjadi pada variasi kampas Indopart, sedangkan keausan terendah dibawahnya terjadi pada kampas variasi kuningan mesh 60 dengan nilai 81,25 mm3/jam kondisi kering, 51,63 mm3/jam kondisi air, 59,37 mm3/jam kondisi oli, 46,87 mm3/jam kondisi air garam, dan 69,37 mm3/jam pada kondisi minyak rem. Hasil data yang diperoleh nilai koefisien gesek tertinggi didapatkan variasi kampas rem indopart, sedangkan yang mendekati didapatkan kampas rem variasi kuningan mesh 60 dengan nilai 0,6226, 0,5725, 0,5383, 0,5754, dan 5718 . Pada foto mikro setelah dilakukan uji gesek kampas mesh 50 mengalami kegagalan bonding kohesive, sedangkan mesh 40 dan 60 mengalami bonding kohesive dan adhesive. Dari pembahasan diatas dapat disimpulkan bahwa besar kecil ukuran serbuk yang digunakan mempengaruhi nilai kekerasan, keausan, dan juga koefisien gesek.
Peran Satuan Sabhara Dalam Mencegah Tawuran Antar Pelajar Di Wilayah Polresta Bogor Kota Guna Terciptanya Kamtibmas Prabowo, Bayu Aji
Indonesian Journal of Police Studies Vol. 4 No. 6 (2020): June, Indonesian Journal of Police Studies
Publisher : Akademi Kepolisian Republik Indonesia

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Abstract

This research is backed by the case of a brawl between students in the Bogor area of the city that many injured victims until the death toll. Often we see in television media about the case of juvenile delinquency namely brawl, so in this study will discuss about the factors that cause the occurrence of the brawl between students and how the execution of the task of Sabhara Patrol Unit in the effort to prevent the occurrence of the brawl between students to create a kamtibmas in Bogor Kota.The research method that the author chose is qualitative research. In qualitative research prioritizes the quality of the data gained and remembers short and limited research time. In qualitative research, the authors dive directly into the field to meet with the speaker and dig the information needed. This is because the information needed is descriptive, which is to theoretically explain the steps taken by the Sabhara unit Bogor Kota in optimizing the prevention of the occurrence of the brawl between students.For five years backwards from 2016 to 2020, there have been 36 laughs in the area of Bogor city. The role of Sabhara's unit already has focus on people, places, material losses, and goods. Factors of the cause of the brawl are divided into two internal and external. And, for the execution of patrol tasks based on planning, organizing, implementation, and control.The suggestion of the whole problem is the strict rule of the school in relation to students ' laughs, both at the reception of new students and all students who have been in school. Another suggestion is to conduct patrol and socialization activities related to the student's brawl in order not to make room for students to make a brawl in the territory of Polresta Bogor Kota.
Pengaruh Berbagai Bahan Organik dan Pupuk ZA pada Metode Double Digging Terhadap Pertumbuhan dan Hasil Bawang Merah Varietas Lembah Palu (Allium cepa L. Var. Aggregatum) Tanari, Yulinda; Prabowo, Bayu Aji; Mowidu, Ita
Indonesian Journal of Agrotech Vol. 8 No. 1 (2023): Jurnal Agrotek Indonesia (Indonesian Journal of Agrotech)
Publisher : Faculty of Agriculture Universitas Singaperbangsa Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33661/jai.v8i1.8359

Abstract

Shallot is a leading horticulture commodity in Indonesia that has long been intensively cultivated. Soil preparation by increasing soil fertility are technologies that can be applied to increase shallot yield. This study aims to determine the effect of the combination of organic matter and ZA fertilizer using the double digging method on the growth and yield of the ‘Lembah Palu’ variety shallots. This research was conducted in Sintuwu Lemba Village, Lage District, Poso Regency from February to June 2020. The study used a factorial randomized block design which consists of two treatment factors. The first factor was the use of organic matter (without organic matter, gliricidia leaves (Gliricidia sepium), banana stems, and rice straw) and the second factor was the dose of ZA fertilizer (without ZA and 400 kg/ha). This study concluded that there was a significant interaction between the types of organic matter and ZA fertilizer dosage in the double-digging method. The application of rice straw without ZA fertilizer in the double digging method gave the highest yield of 2.82 tons/ha. Rice straw as the organic matter gave the highest average growth and yield of shallots although they were not significantly different from gliricidia leaves and banana stems. The application of ZA fertilizer had no significant effect on the growth and yield of shallot.
Co-Authors Ita Mowidu Pramuko Ilmu Purboputro Tanari, Yulinda