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PERAN PENGUAT PARTIKEL ALUMINA DAN SILIKON KARBIDA TERHADAP KEKERASAN MATERIAL KOMPOSIT MATRIKS ALUMINIUM Hendri Sukma; Rini Prasetyani; Dwi Rahmalina; Rizal Imanuddin
Prosiding Semnastek PROSIDING SEMNASTEK 2015
Publisher : Universitas Muhammadiyah Jakarta

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Komposit matriks aluminium berpenguat partikulat banyak dikembangkan untuk aplikasi komponen otomotif dan kendaraan taktis militer, karena mempunyai berat jenis yang lebih ringan dibanding logam ferrous serta memiliki performa yang baik seperti kekuatan tinggi, kekerasan tinggi, sifat tahan aus dan koefisien ekspansi panas rendah. Penelitian ini bertujuan untuk menghasilkan material komposit matriks aluminium berpenguat alumina (Al2O3) dan silicon karbida (SiC) yang memiliki sifat mekanis yang paling baik. Komposit dibuat dari matriks Al-3Si-9Zn-6Mg berpenguat partikel alumina (Al2O3) dan silikon karbida (SiC), dengan variasi fraksi volume alumina 10% tanpa tambahan SiC, serta dengan penambahan SiC 5% dan 10%. Proses pengecoran dilakukan dengan metode squeeze casting. Hasil pengujian menunjukkan bahwa komposit dengan penguat alumina tanpa silicon karbida memiliki kekerasan yang paling tinggi yaitu rata-rata sebesar 60,28 HRB, dengan harga impak 0.0383 J/mm2. Dengan penambahan silicon karbida 5 % didapat nilai kekerasan yang lebih rendah yaitu 43 HRB dengan harga impak tetap 0.0383 J/mm2, serta untuk penambahan silicon karbida 10% didapat nilai kekerasan 41,8 HRB dengan harga impak 0.0638 J/mm2. Tidak terjadinya peningkatan kekerasan material komposit alumina dengan penambahan penguat silicon karbida ini disebabkan karena ketidaksempurnaan dalam proses peleburan dan pengecoran, dimana partikel silikon karbida sangat sulit bercampur secara merata dengan aluminium dan alumina. serta timbulnya cacat porositas (void) akibat dari masih terdapatnya udara yang terperangkap di dalam material coran yang tidak sepenuhnya terbuang pada saat proses degassing. Dari analisa struktur mikro terlihat partikel SiC tidak tersebar secara merata dan cenderung untuk mengumpal di satu tempat.

PERANCANGAN WHEEL TURBINE PADA PEMBANGKIT LISTRIK MIKRO GAS TURBIN Eko Prasetyo Prasetyo; Rudi Hermawan Hermawan; Muhammad Edza Fakhri; Rini Prasetyani Prasetyani; Erlanda Augupta Pane
Jurnal Ilmiah Teknik Mesin POROS Vol 16, No 2 (2018): Jurnal Ilmiah Teknik Mesin Poros
Publisher : Program Studi Teknik Mesin Universitas Tarumanagara

Micro gas turbine power generator has advantages in low maintenance and operational costand can be moved easily. Gas fueled micro gas turbine generate power by delivering pressurizedcombustion gas to mechanical power and stored in battery via altenator. In this research, turbine whellfrom Garrett TA31 in micro gas turbine is redesigned to increase the system performance. Experiment ofredesigned turbine wheel is then compared with the previous configuration turbine wheel performance.The results show the system power is increased from 0,23 kW to 3,1 kW.

Analisis Kinerja Keuangan LSP ABC Jakarta dalam Penentuan Strategi Bisnis dengan Pendekatan Analisis SWOT Renny Reswati; Haris Adi Swanoro; Rini Prasetyani; Dadan Hadiat Ramdany
Journal on Education Vol 5 No 3 (2023): Journal on Education: Volume 5 Nomor 3 Tahun 2023
Publisher : Departement of Mathematics Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joe.v5i3.1524

LSP ABC is an oil and gas certification service company located in the Duren Tiga, Pancoran, South Jakarta. At the beginning of 2020, economic, social and cultural activities began to be disrupted by the Covid-19 pandemic. This has an impact on the company, so that the certification application data in 2020 tends to decrease compared to the previous year, 2019. Therefore, it is necessary to analyze the company's financial ratios to find out the impact of this pandemic on the company's financial performance. This study aims to determine the company's financial condition using the ratio analysis method and managing business strategies using the SWOT analysis method to determine alternative strategies in determining decisions for the company so that company goals can be achieved. Data collection is done by interview the LSP ABC which is then processed and analyzed, the results obtained in the form of an average liquidity value of 2.874% which was above the company standard of 150%, the average solvency value of 92.6% according to the standard which is under 200%, and a profit of 24%. Based on these results, it can be concluded that the company's profits in 2020 decreased when compared to 2019 but the financial condition was in a good condition. Meanwhile, for business strategy analysis using SWOT, LSP ABC is in quadrant II position so it must diversify its business.

Tata letak From to Chart (FTC), Activity Relationship Chart (ARC), Activity Relationship Diagram (ARD), dan Area Allocation Diagram (ADD). Prasetyani Rini Rini Prasetyani
Baut Dan Manufaktur Vol 5 No 1 (2023): Jurnal Baut Dan Manufaktur Volume 5 No. 1 Tahun 2023 | April 2023
Publisher : Fakultas Sains Dan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34005/bautdanmanufaktur.v5i1.2532

Waste management in Tegal Regency is using an open dumping system. Open dumping waste treatment system is the worst waste management system, because in principle this system is disposing of garbage, stockpiled with soil obtained from the hills in the landfill, and there is no follow up from the waste. So we need a waste management system with the concept of zero waste. A waste management system with the concept of zero waste is a waste management system that does not produce waste again when the output of the processing results. The concept will later be developed into PLTSa in Tegal Regency. The making of PLTSa will certainly require a large enough area to have enough supporting areas to run the process of PLTSa. Later Penujah PLTSa area will not only be designated as a power plant but will also be developed into an educational tourism area. Making PLTSa will certainly require a large enough area to have enough supporting areas for the process of PLTSa to run. This mini plant area was designed using the From to Chart (FTC) method, Activity Relationship Chart (ARC), Activity Relationship Diagram (ARD), and Area Allocation Diagram (ADD). The results of the design produce the type of production layout that is Group Technology Layout and alternative layout 1 as a proposed layout.

DATA MINING DENGAN ALGORITMA DYNAMICSOME UNTUK PENENTUAN PENGIRIMAN DAN STOK YANG BELUM DI KIRIM PUPUK SUBSIDI Rini Prasetyani; Taufik Djatna
Journal of Informatics and Advanced Computing (JIAC) Vol 3 No 1 (2022): Journal of Informatics and Advanced Computing
Publisher : Teknik Informatika Universitas Pancasila

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Data Mining is a new technology that is very useful to help companies find very important information from their data warehouses. Some data mining applications focus on prediction, they predict what will happen in a new situation from data that describes what happened in the past. In order to find out how many tons of fertilizer have been sent and how many have not been sent by the subsidized fertilizer factory appointed by the government. can be done by using analytical techniques, namely the analysis of consumer buying habits. Detection of fertilizers that are often purchased together is done using association rules. In this study, an a priori algorithm will be used to determine the association rules for buying fertilizer. So in solving these problems, the DynamicSome Algorithm method is used, which is a modification of the Apriori algorithm which will search for frequent itemsets from transaction data. Frequent itemset is a pair of items found in transaction data. In addition, the DynamicSome algorithm is also used to analyze the relationship between different items in a large set of items, this aims to see the relationship and attachment between these items, from the calculation results obtained in the 2016 tax year there are still 5 districts that have not been sent and in 2017 still 3 districts have not been sent.

DATA MINING DENGAN ALGORITMA DYNAMICSOME UNTUK PENENTUAN PENGIRIMAN DAN STOK YANG BELUM DI KIRIM PUPUK SUBSIDI Rini Prasetyani; Taufik Djatna
Journal of Informatics and Advanced Computing (JIAC) Vol 3 No 1 (2022): Journal of Informatics and Advanced Computing
Publisher : Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/jiac.v3i1.3944

Data Mining is a new technology that is very useful to help companies find very important information from their data warehouses. Some data mining applications focus on prediction, they predict what will happen in a new situation from data that describes what happened in the past. In order to find out how many tons of fertilizer have been sent and how many have not been sent by the subsidized fertilizer factory appointed by the government. can be done by using analytical techniques, namely the analysis of consumer buying habits. Detection of fertilizers that are often purchased together is done using association rules. In this study, an a priori algorithm will be used to determine the association rules for buying fertilizer. So in solving these problems, the DynamicSome Algorithm method is used, which is a modification of the Apriori algorithm which will search for frequent itemsets from transaction data. Frequent itemset is a pair of items found in transaction data. In addition, the DynamicSome algorithm is also used to analyze the relationship between different items in a large set of items, this aims to see the relationship and attachment between these items, from the calculation results obtained in the 2016 tax year there are still 5 districts that have not been sent and in 2017 still 3 districts have not been sent.

RANCANG BANGUN RANTAI PASOK AGROINDUSTRI SORGHUM DI JAWA BARAT: KAJIAN LITERATUR DAN AGENDA RISET Prasetyani, Rini; Marimin, Marimin; Arkeman, Yandra; Sugiarto, Sugiarto
Jurnal Teknologi Industri Pertanian Vol. 34 No. 1 (2024): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24961/j.tek.ind.pert.2024.34.1.75a

Sorghum is a local food ingredient, and as it grows, it has the potential to reduce reliance on imported food. From the roots to the fruit, sorghum crops can be processed into a variety of food products, crafts, and medicines. Currently, sorghum flour is only available through imports. Supply Chain Analytics, Value Chain Management, Big Data, Supply Chain Performance, and Decision Support Systems are the five defined components of a sustainable supply chain. In the future, this research covered Decision Support Systems to Improve Unequal Profits Among Farmers, Supply Chain Management Strategies, and Supply Chain Performance to Increase Productivity. Several journals were collected by the author using the Publish or Perish 8 software, including Scopus 200 journals and databases Science Direct 145, and aside from that, there is knowledge of book literature as well as knowledge of other sciences. Then, using the VOS viewer software, look for novelty to see the novelty of previously unstudied relationships. This study's novelties include methodology and substance, such as: 1. production technology for managing the design and construction of a sustainable supply chain model for the agroindustry of sorghum; 2. Choosing sorghum and estimating demand for sorghum and sorghum products using technology in the supply chain. 3. Develop a partnership performance model for the sorghum cultivation business and identify sorghum production supplies in the supply chain. supply, 4. Create a distribution model and design a transportation network for sorghum products in the supply chain. Keywords: inventory forecasting, sorghum supply chain, transportation, PRISMA

Sosialisasi dan Pendampingan Produksi Pakan Ternak Ramah Lingkungan Berbasis Hijauan Sorgum dalam Mendukung Ketersediaan Stok Pakan Nasional Prasetyani, Rini; Sodikun, Sodikun; Sundana, Sambas
Capacitarea : Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 1 (2024): Januari - April
Publisher : Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/capacitarea.2024.004.01.03

Silase sebagai bahan pakan ternak ruminansia sangat membantu keberadaannya. Peternak tradisional yang hanya mampu beternak sampingan tidak bisa memberikan penghasilan yang layak. Petani harus selalu berinovasi dalam pembuatan pakan ternaknya agar tidak bergantung pada mencari rumput setiap hari. Menjadikan silase sebagai pakan ternak dapat membantu peternakan berkelanjutan. Pengabdian kepada masyarakat yang dilaksanakan di Dusun Weling, RT 03 RW 04, Desa Cibuluh, Kecamatan Ujungjaya, Kabupaten Sumedang, berfokus pada sosialisasi dan pendampingan pembuatan pakan ternak ramah lingkungan berbasis hijauan sorgum (silase) dalam mendukung ketersediaan stok pakan nasional. Sosialisasi dan pendampingan pembuatan silase dilakukan bersama kelompok tani setempat, dimana menggunakan hijauan sorgum sebagai bahan utama produksi silase. Hijauan sorgum dicacah menggunakan mesin cupper, kemudian dicampur dengan dedak, molasses, singkong atau menir, diaduk dan dikemas menggunakan drum plastik dan dipadatkan. Pembuatan silase yang kedap udara menjamin udara luar tidak masuk, karena jika bahan tersebut terkontaminasi udara luar maka akan rusak dan berjamur. Hasil akhir dari sosialisasi dan pendampingan ini sebuah produk silase siap pakai, serta keterampilan para kelompok tani setempat dalam membuat silase. Harapannya tentunya dari hasil Sosialisasi dan pendampingan pembuatan silase dapat mendukung ketersediaan stok pakan nasional, khususnya di daerah Desa Cibuluh, Kecamatan Ujungjaya, Kabupaten Sumedang.

Pemberdayaan Industri Kecil dan Menengah Pakan Ternak melalui Optimalisasi Mesin Pencacah Sorgum Rini Prasetyani koehkoeh; Renny Reswati; Adhi Mahendra; Sodikun
LOSARI: Jurnal Pengabdian Kepada Masyarakat Vol. 8 No. 1 (2026): April 2026
Publisher : LOSARI DIGITAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53860/losari.v8i1.541

This program aims to develop and optimize a sorghum chopper machine used by Small and Medium Industries (SMIs) as a strategic innovation to support national food security in line with the current government’s Asta Cita agenda. Sorghum is a highly nutritious and promising commodity for alternative livestock feed; however, the chopping process often faces technical issues, particularly during the initial operation of the machine. To address this problem, an additional optional device was engineered to function as a tension adjuster that regulates the tightness of the V-belt connecting the power source and the chopper unit. With this optional device, the machine’s starting process becomes lighter, safer, and more efficient. The research employed design engineering and performance testing methods, with assessment parameters including chopping capacity, fuel consumption, and cut quality. The test results indicated that the optional device successfully reduced the machine’s initial load by up to 35%, improved operational stability, and produced sorghum chops measuring 1–3 cm with an average capacity of 180 kg/hour. This innovation provides a significant contribution to enhancing the efficiency of sorghum-based livestock feed processing for SMIs and supports the national policy direction toward strengthening food self-sufficiency.

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