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All Journal Transmisi Journal of Inovation and Technology of Agroindustry Jurnal Agrium Abdimas: Jurnal Pengabdian Masyarakat Universitas Merdeka Malang Jurnal Ilmiah Manajemen Kesatuan JURNAL FLYWHEEL Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri Prosiding University Research Colloquium RING Mechanical Engineering Jurnal REP (Riset Ekonomi Pembangunan) Jurnal Polimesin
Agus Suprapto
Jurusan Teknik Mesin Fakultas Teknik Universitas Merdeka Malang Jl. Terusan Raya Dieng 62-64 Malang
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Social Sciences

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STUDI KELAYAKAN PENDIRIAN INDUSTRI PENGOLAHAN SALAK SKALA KECIL DI KABUPATEN BANJARNEGARA Suprapto, Agus
Journal of Inovation and Technology of Agroindustry Vol 1, No 1 (2012): volume 1 issue 1 (2012)
Publisher : Universitas Jenderal Soedirman

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Abstract

ABSTRAKPenelitian ini bertujuan untuk: (1) Mengetahui kelayakan pendirianindustri pengolahan salak skala kecil dalam aspek pasar dan pemasaran, teknisdan teknologi, manajemen operasional, hukum dan dampak lingkungan, danfinansial; (2) mengetahui industri pengolahan salak yang paling sesuaidikembangkan di Kabupaten Banjarnegara. Hasil penelitian menunjukkan,keempat industri pengolahan salak yang diteliti layak untuk dilaksanakan, namunindustri kripik salak lebih unggul dibandingkan industri pengolahan yang lain,terutama dalam aspek pasar dan pemasaran serta aspek finansial. Kripik salaksudah cukup dikenal dan disukai masyarakat sehingga dalam pemasaran lebihmudah. Dalam aspek finansial, industri kripik salak memiliki nilai NPV, IRR,ROI, dan PI yang paling tinggi, dengan PBP terpendek dan BEP terendah.Sehingga dapat disimpulkan, industri kripik salak merupakan industri pengolahanyang paling sesuai di Kabupaten Banjarnegara.Kata kunci: industri pengolahan salak, kripik salak, NPV, IRR, ROI, PI, PBP,BEP.
Kekerasan Hot Rolled Plate Steel Lokaltebal 10 mm Dengan Proses Quench dan Temper Taufik, Achmad; Pratikto; Suprapto, Agus; Sonief, Ahmad As'ad
JURNAL FLYWHEEL Vol 9 No 1 (2018): Jurnal Flywheel
Publisher : Teknik Mesin S1 ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/flywheel.v9i1.2551

Abstract

Kekerasan merupakan fenomena yang diamati pada baja HRPS. Penelitian ini, dilakukan dengan cara perlakuan panas quench dan temper,dengan menganalisis kekerasan dari suatu material, menggunakan uji kekerasan Hardness tester. Kekerasan diidentifikasi dari sifat perubahan yang ditunjukkan oleh data hasil uji kekerasan. Hasil penelitian memperlihatkan bahwa, terjadi kekerasan yang semakin meningkat pengaruh dari tingkat pemanasan. Proses perlakuan panas quench-temper pada baja HRPS memiliki pengaruh yang jelas terhadap perubahan struktur dan sifat mekanik baja HRPS.
SENTRA KULAKAN MEDIA PEMBERDAYAAN UMKM Suprapto, Agus; Poerwanto, Andi
Abdimas: Jurnal Pengabdian Masyarakat Universitas Merdeka Malang Vol 1, No 1 (2016): December 2016
Publisher : University of Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/abdimas.v1i1.1151

Abstract

Sentra Kulakan merupakan penopang ekonomi bagi pelaku UMKM dan masyarakat kurang mampu. Adanya sentra kulakan yang menyediakan kebutuhan bahan baku bagi UMKM telah memberikan pengaruh besar atas berdirinya kembali UMKM yang mati suri. Banyaknya sentra kulakan yang berdiri di beberapa wilayah kabupaten Malang dan kota Malang menggairahkan kembali usaha kecil yang ada diwilayahnya. Selain akses pengadaan bahan baku dengan cara pembelian angsuran, beberapa pelatihan juga perlu dilakukan untuk memberikan penguatan kemampuan mereka dalam aspek produksi, aspek manajemen dan juga akses permodalan ke lembaga keuangan. DOI: https://doi.org/10.26905/abdimas.v1i1.1151
ANALISIS TEGANGAN DAN REGANGAN PADA KAWAT STAINLESS STEEL 304 HASIL PERLAKUAN HARDENING DAN TEMPERING Sekiwa; Suprapto, Agus; Tsamroh, Dewi Izzatus; Rusdijanto
RING ME Vol 4 No 1 (2024): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rm.v4i1.21747

Abstract

Currently, the demand for materials, especially metals, is very significant. Iron and steel are inseparable basic needs. However, with diverse needs, the desired mechanical characteristics of a material also vary. These mechanical aspects include hardness, ductility, strength, and toughness. The use of stainless steel is increasing worldwide due to its superior characteristics. One of them is using stainless steel wire. This research aims to identify the tensile strength limit of 304 stainless steel wire with variations in hardening and tempering. The test results show that the unheat treated 304 stainless steel wire has a higher stress value than the heat treated one. The test results show that the stress value in the test object which has undergone heat treatment of hardening at a temperature of 820°C with a holding time of 30 minutes with water cooling and tempering at a temperature of 400°C with a holding time of 20, 30, 40 minutes with air cooling has decreased. This can be compared with raw or untreated specimens which have a stress value of 176.815 kg/mm2. For specimens that underwent the hardening heat treatment process, the stress value decreased to a value of 88.025 kg/mm2. Meanwhile, for test objects that underwent a tempering process, the stress also decreased compared to normal or untreated test objects with stress values ​​for 20 minutes of tempering 87,261 kg/mm2, 30 minutes of tempering 87,261 kg/mm2, and 40 minutes of tempering 87,006 kg/mm2.
INVESTIGASI PENGARUH VARIASI AIR LAUT TERHADAP LAJU KOROSI BAJA ST 37 Djahilepang, Raywantus Baur; Suprapto, Agus; Tsamroh, Dewi Izzatus
RING ME Vol 4 No 1 (2024): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rm.v4i1.21765

Abstract

In the current era of globalization, metal has an important role and is a primary need in various aspects of human daily life. One metal that is widely used is steel, which is a mixture of iron (Fe) and carbon (C) with the addition of other ingredients in the modern context. Low carbon steel, such as ST 37, is often used in making components such as nails, bolts and screw threads. The affordability and availability of ST 37 makes it a top choice in the construction industry, although it is often subject to corrosion problems due to its natural properties. In various situations and conditions, the wide use of ST 37 steel often interacts with natural elements, such as sea water, river water, oxygen, pH values, and other environmental conditions. The problem of corrosion is a major concern for many researchers and industry, because it can affect various processes such as cleaning by etching, pickling, and the use of corrosive chemicals such as acids and salts to inhibit corrosion. The test results showed that the highest corrosion rate occurred in Tanjung Perak Surabaya sea water, amounting to 2.817 mpy, while Panjang Pasuruan sand sea water had the lowest corrosion rate of 0.626 mpy.
Failure Analysis of Galvanized Iron Pipe at Perumda Tirta Kanjuruhan Pramita, Cynthia Rosa; Suprapto, Agus; Widyastuti, Ike
TRANSMISI Vol 19, No 2 (2023): September 2023
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v19i2.12015

Abstract

The most commonly used type of water pipe is iron pipe or commonly called Galvanized Iron pipe. The disadvantage of GI pipe is that it rusts easily. So it can result in degradation, decreased efficiency and construction, poor water quality, and higher maintenance costs. Water channeled through rusty pipes will pollute the water and adversely affect the health of those who consume it. This study aims to determine the factors causing failures of GI pipe in the distribution pipeline that have failed due to corrosion. The tested pipes is 1/2"ᴓ sized, 5-year-old corroded pipe whose distribution uses a gravity system and a pumping system. To support this analysis, operational data on fluid and environmental conditions around the pipeline are needed, observations on macro and micro structures, and hardness testing. The corrosion rate is calculated through the thickness loss method and the corrosion rate in the gravity system is 0.153 mm / year that higher than pipe in pumping system. Microstructure observations support the characterization of the material that this pipe is a mild steel, where this type of steel has a high Fe content so it is vulnerable to corrosion attacks. Rockwell hardness testing showed that the corrosion rate is directly proportional to the hardness value of the pipeline. The results of the analysis show that the environment around the pipe which has low soil resistivity and high humidity levels is the main factor in the occurrence of uniform corrosion of the pipe. The selection of inappropriate materials is also supportive as the cause of corrosion occurring.
Aplikasi PGPR Akar Bambu Dan Konsentrasi Pupuk Organik Cair Terhadap Pertumbuhan Dan Hasil (Vigna radiata L. R. Wilczek. var. vima-2) Nurrohman Fajri, Haru; Suprapto, Agus; Nur Jannah, Eka
Agrium Vol 20 No 4 (2023)
Publisher : Faculty of Agriculture, Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/agrium.v20i4.13992

Abstract

Kacang hijau (Vigna radiata L. R. Wilzcek) merupakan tanaman pangan yang sering dikonsumsi masyarakat di Indonesia. Produksi tanaman kacang hijau mengalami kondisi yang fluktuatif. Upaya yang dapat dilakukan yaitu penambahan PGPR akar bambu dan pemupukan dengan pupuk organik cair. Penelitian ini bertujuan untuk menganalisis pengaruh aplikasi PGPR akar bambu dan konsentrasi pupuk organik cair. Penelitian ini dilaksanakan  pada bulan     Januari-Maret 2023 di Krajan, Desa Soropadan, Kecamatan Pringsurat, Kabupaten Temanggung. Metode yang digunakan dalam penelitian adalah Rancangan Acak Kelompok  dua faktor yaitu aplikasi PGPR akar bambu dan konsentrasi pupuk organik cair phospor. Data dianalisis menggunakan analisis sidik ragam  (ANOVA), apabila terdapat berbeda nyata diuji lanjut dengan uji beda nyata terkecil (BNT) 1% dan 5 % serta Orthogonal Polynomial. Hasil penelitian menunjukkan bahwa perlakuan aplikasi PGPR akar bambu 10 ml/l sangat berbeda nyata terhadap tinggi tanaman dan berbeda nyata terhadap luas daun. Perlakuan konsentrasi pupuk organik cair 0, 8, 12, 16 ml/l tidak berbeda nyata terhadap tinggi tanaman, jumlah daun, luas daun, jumlah polong per tanaman, berat polong per tanaman, berat kering biji per tanaman, laju fotosintesis bersih, radiasi aktif fotosintesis, transpirasi, konduktansi stomata dan kadar protein. Tidak terdapat interaksi antara aplikasi PGPR akar bambu dan konsentrasi pupuk organik cair.
Perbandingan Laju Korosi dengan Menggunakan Spray Chamber Test dan Corrosion Coupon Rack pada Baja Karbon Rendah Suprapto, Agus; Tsamroh, Dewi Izzatus; Sentosa, Obaja Eden Riyanto
RING ME Vol 4 No 2 (2024): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rme.v4i2.22887

Abstract

Penelitian ini bertujuan untuk membandingkan laju korosi baja karbon rendah menggunakan dua metode pengujian, yaitu spray chamber test dan corrosion coupon rack. Baja karbon rendah dipilih karena penggunaannya yang luas di berbagai industri, seperti konstruksi dan peralatan, namun memiliki kerentanan terhadap korosi di lingkungan tertentu. Penelitian ini menggunakan metode spray chamber test dengan mensimulasikan lingkungan korosif dengan penyemprotan larutan garam secara terkontrol, sedangkan corrosion coupon rack menggunakan eksposur langsung terhadap larutan korosif dalam kondisi statis. Laju korosi dianalisis berdasarkan perubahan massa spesimen dan dievaluasi menggunakan perhitungan corrosion rate. Hasil penelitian menunjukkan bahwa laju korosi yang dihasilkan oleh spray chamber test cenderung lebih tinggi dibandingkan dengan corrosion coupon rack. Hal ini disebabkan oleh mekanisme penyemprotan yang meningkatkan kontak permukaan spesimen dengan larutan korosif, mempercepat reaksi oksidasi. Sementara itu, corrosion coupon rack menunjukkan laju korosi yang lebih lambat karena kondisi larutan statis yang mengurangi dinamika reaksi.
INTEGRATED FOOD SECURITY MANAGEMENT USING SIPEKAN (FOOD SECURITY MONITORING INFORMATION SYSTEM) Sasana, Hadi; Purbaningrum, Catarina Wahyu Dyah; Rohmah, Siti; Afriyanti, Afriyanti; Rochmadi, Imsak; Suprapto, Agus; Bharata, Risma Wira; Negara, Julius Galih Prima
Jurnal REP (Riset Ekonomi Pembangunan) Vol. 10 No. 1 (2025): April 2025
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/rep.v10i1.2107

Abstract

The study aims to investigate an integrated food security management using the Food Security Monitoring Information System, called “SIPEKAN” (Sistem Informasi Pemantauan Ketahanan Pangan) in Gunungkidul Regency, Yogjakarta, Indonesia. This study is a research and development-type of research (Research and Development) with the development model presented by Plomp (2013). The target groups are the community, farmers, agricultural extension workers, the agricultural service, the trade service, and the local government of Gunungkidul Regency. This research is expected to provide an integrated food security management equipped by the Food Security Monitoring Information System, called "SIPEKAN", which can be one answers to ensure food security in Gunungkidul Regency. By using SIPEKAN, it is projected that the community/farmers will easily sell their agricultural products, agricultural field workers will easily input agricultural potential data in each assisted area, the agricultural office and trade office will easily monitor product availability in each area in Gunungkidul Regency, and the Gunungkidul Regency Government can also employ the monitoring results provided by information system as a basis for policy making.
Innovative Agricultural Financing Models to Enhance Farmers’ Access to Sustainable Credit and Investment Widi, Riantin Hikmah; Suprapto, Agus; Ellyta
Jurnal Ilmiah Manajemen Kesatuan Vol. 13 No. 5 (2025): JIMKES Edisi September 2025
Publisher : LPPM Institut Bisnis dan Informatika Kesatuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37641/jimkes.v13i5.3387

Abstract

Farmers’ access to sustainable finance remains a persistent structural barrier to agribusiness development in many developing countries. In Indonesia, conventional credit schemes often fail to align with the seasonal nature and risk profile of agriculture, limiting productivity and financial inclusion among smallholder farmers. This study aims to evaluate innovative financing models that can improve access to credit and sustainable investment in three agrarian regions: Kulon Progo, Jember, and Tanah Datar. Using a qualitative multiple case study approach, the research examines the design and implementation of value chain financing, blended finance mechanisms, and digital lending platforms within varying local agricultural contexts. The findings reveal that value chain financing in Kulon Progo significantly reduced non-performing loan rates to 1.2%; digital lending in Jember reached over 3,200 young farmers; and blended finance in Tanah Datar contributed to a 26% increase in household income. These results highlight the importance of coordination among agribusiness actors, financial institutions, and enabling policy frameworks. The study contributes practical insights for policymakers by identifying key success factors such as adaptive regulation, improved digital infrastructure, and institutional partnerships needed to scale inclusive financing models and enhance the resilience of Indonesia’s smallholder farmers.
Co-Authors Achmad Taufik Afriyanti Afriyanti, Afriyanti Agus Iswantoko Andrijono, Djoko Bharata, Risma Wira Catarina Wahyu Dyah Purbaningrum, Catarina Wahyu Dyah Darto, D Dewi Izzatus Tsamroh Dewi Septanti, Rina Djahilepang, Raywantus Baur Ellyta Hadi Sasana Historiawati, H Irwandi, Jul Viansyah Dwiki Jumiadi, Jumiadi MARIA BINTANG Murti Astiningrum Nasroh, Zahrotul Ulin Negara, Julius Galih Prima nur jannah, eka Nurrohman Fajri, Haru Perdana, Adhi Surya Poerwanto, Andi Pramita, Cynthia Rosa Pungky Eka Setyawan Riyanto, Obaja Eden Sentosa Rochmadi, Imsak Rusdijanto Sekiwa Siti Rohmah Sonief, Ahmad As'ad Whinarko Juliprijanto Wibowo, Adalia Natarina Widi, Riantin Hikmah Widyastuti, Ike