Article Per Year (5 Year)
p-Index From 2019 - 2024
3.507
P-Index
This Author published in this journals
All Journal WIDYA TEKNIKA Turbo : Jurnal Program Studi Teknik Mesin Conference on Innovation and Application of Science and Technology (CIASTECH) JOURNAL OF SCIENCE AND APPLIED ENGINEERING JAST : Jurnal Aplikasi Sains dan Teknologi J-Dinamika: Jurnal Pengabdian Kepada Masyarakat Jurnal Aplikasi Dan Inovasi Ipteks SOLIDITAS Jurnal Energi dan Teknologi Manufaktur (JETM) V-MAC (Virtual of Mechanical Engineering Article) Journal mechanical and manufacture technology (JMMT) Aceh International Journal of Science and Technology JASTEN (Jurnal Aplikasi Sains Teknologi Nasional
Dadang Hermawan
Fakultas Teknik, Universitas Widyagama, Malang
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Other

Published : 26 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 26 Documents
Search

 1   2   3 
Penggunaan Sistem Keuangan Berbasis Ms. Accesss Dalam Meningkatkan Kualitas Pengelolaan Keuangan UKM Keripik Pisang “Ramesta” Arif Rizki Fadhillah; Dadang Hermawan
JASTEN (Jurnal Aplikasi Sains Teknologi Nasional) Vol. 2 No. 1 (2021)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Institut Teknologi Nasional Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1007.984 KB) | DOI: 10.36040/jasten.v2i1.3436

Abstract

A computer-based financial management system is an urgent matter, so that it can help SMEs in running a business with easy and good financial management. One of them is UKM Ramesta, which still uses traditional management systems, so that they do not yet have a financial management system that meets accounting standards. Based on the problems faced by UKM Ramesta, it is necessary to provide training for UKM partners on financial management based on Microsoft Access using the Cashflow Simplebook software. The purpose of this activity is for SMEs to experience increased performance and business competitiveness. Implementation methods in solving problems with UKM Ramesta partners, including: problem identification, problem solution, discussion of the Ramesta UKM implementation team and partners, training on Microsoft Access-based SME financial management systems, evaluating the use of simplebook cashflow software for SME financial management. The conclusion of this activity is to increase the ability and knowledge of UKM Ramesta partners in managing the financial system, the use of the Cashflow Simplebook application helps UKM Ramesta in preparing better financial reports.
Pemanfaatan dinding sebagai permukaan kondensasi untuk meningkatkan kinerja solar still double slope Nova Risdiyanto Ismail; Purbo Suwandono; Dadang Hermawan; Frida Dwi Anggraeni
TURBO [Tulisan Riset Berbasis Online] Vol 12, No 1 (2023): Jurnal TURBO
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v12i1.2439

Abstract

Indonesia is an archipelagic country that often experiences drought, especially in the dry season. In the dry season, there is very abundant solar and seawater energy, so to overcome the problem, you can use solar still technology that utilizes solar energy to process seawater into condensate / fresh water economically. Various efforts are made to optimize the performance of solar stills, in this case the study aims to utilize the wall as a condensation surface to improve the performance of solar still double slope. The study was conducted experimentally by comparing: 1. Solar still double slope without utilizing the wall as a condensing surface, 2. Solar still double slope by utilizing the north side wall as a condensing surface, 3. Solar still double slope by utilizing the south side wall as a condensation surface, and 4. Solar still double slope by utilizing the north and south side walls as condensing surfaces. The results of the study using solar still double slope by utilizing the north wall as a condensing surface obtained the highest productivity of 1966 ml and the highest efficiency of 68.58%.
Karakteristik Nyala Api Dan Air Fuel Ratio Minyak Nabati Terhadap Pembakaran Premixed Bagus Wahyu Pratama; Gatot Soebaktiyo; Dadang Hermawan
Virtual of Mechanical Engineering Article Vol 8 No 1 (2023): V-MAC
Publisher : Prodi Teknik Mesin Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/v-mac.v8i1.2739

Abstract

Perkembangan otomotif sebagai sarana transportasi sangat memudahkan manusia dalam melakukan pekerjaan, dalam era modern seperti sekarang ini kendaraan sudah menjadi salah satu kebutuhan pokok, hal ini dibuktikan dengan melonjaknya penjualan kendaraan bermotor setiap tahunnya. Diketahui bahwa bahan bakar Nabati merupakan sumber energi yang dihasilkan dari tumbuhan dan memiliki potensi yang sangat besar untuk menggantikan bahan bakar fosil, dua jenis bahan bakar yang paling sering digunakan adalah etanol dan biodiesel, biodiesel dari minyak kelapa sawit mencatatkan penurunan emisi sebesar 50% dibanding minyak solar, yang artinya selain sebagai bahan bakar alternative bahan bakar nabati juga lebih ramah lingkungan. Untuk itu dalam penelitian ini dicari karakteristik minyak nabati yaitu minyak kayu putih, minyak kemiri, minyak kedelai dan minyak kacang tanah terhadap pembakaran secara premixed, yang sesuai dengan karakteristik pembakaran pada mobil. Dalam penelitian ini menggunakan metode penelitian eksperimental nyata (true experiment reseach). objek yang digunakan dalam penelitian ini adalah karakteristik nyala api dan air fuel ratio minyak nabati terhadap pembakaran premixed. Data yang diperoleh akan diplot pada grafik yaitu air fuel rasio terhadap masing-masing minyak nabati dan udara. Grafik ini akan dijadikan acuan untuk menganalisis bagaimana karakteristik bahan bakar minyak nabati terhadap pembakaran premixed. Hasil penelitian menunjukkan bahwa minyak kacang tanah memiliki profil nyala api yang paling baik dengan RGB sebesar 155.164 dan jari-jari kontur 2,87, diikuti minyak kedelai dengan RGB sebesar 62.956 dan jari-jari kontur 2,6275, minyak kayu putih memiliki profil nyala api yang paling rendah dengan RGB 12.639 dan jari-jari kontur 1,47, sementara minyak kemiri tidak dapat menyala pada saat perlakuan uji pengambilan data. Sedangkan AFR terbaik pembakaran premixed minyak nabati adalah 20:40. Boilimg point tidak berpengaruh terhadap temperatur, kacang tanah memiliiki boiling point yang tertinggi yaitu 363 derajat celcius, sementara kedelai memiliki temperatur pembakaran yang paling baik yaitu 42,4 derajat celcius Kata kunci: pembakaran premixed, air fuel ratio, minyak kayu putih, minyak kemiri, minyak kedelai.
Investigation of Performance of Stone Fin Solar Still Absorber by Water Depth Variations. Nova Risdiyanto Ismail; Dadang Hermawan; Purbo Suwandono; Leo Hutri Wicaksono
Aceh International Journal of Science and Technology Vol 12, No 2 (2023): August 2023
Publisher : Graduate Program of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.12.2.27188

Abstract

Passive Solar is still suitable for Indonesia's islands and coastal areas. Various attempts have been made to increase the performance of passive solar stills, including using porous materials, fins absorber models, and making water in the form of a thin layer. This study aims to increase the distillate output and Efficiency of Solar still. This study's method compares stone fin solar stills absorbers using water depth variations of 1 cm, 2 cm, and 3 cm with conventional solar stills at a water depth of 1 cm. The study resulted in the distillate output of stone fin solar still absorber of 3.35 (liter/m2.day) higher than the conventional solar stills 2.44 (liter/m2.day) at a depth of 1 cm. The highest Efficiency of solar stills using the stone fin solar still absorbers is 58.45% higher than conventional solar stills, 43.60% at a depth of 1 cm. Solar stills with lower water depths resulted in higher distillate output and Efficiency. Solar stills using stone fin absorbent plates produce higher productivity and Efficiency than conventional ones
Analysis of The Influence of Additional Percentage of Catalyst on The Electrolysis Process on Hydrogen Volume and Flame Profile Mohammad Julio Akbar; Gatot Soebiyakto; Akhmad Farid; Dadang Hermawan
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 2 (2023): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v6i2.4976

Abstract

Utilization of new and renewable energy is an important point for Indonesia for development, science and technology. On the other hand, the use of fossil fuels is very limited so the alternative fuel solutions are vegetable oil (BBN) and methane gas and others, even in the future the substitute for these fuels will use electricity. The material used in this research is stainless steel. The independent variable tested was the catalyst percentage of NaCl, NaOH and NaHCO3 of 40%. The dependent variables are the volume of hydrogen and flame characteristics. The control variable uses a voltage of 12 volts using water and distilled water as solvents with a volume of 1000 ml. The data collection procedure starts with 12 Volt DC current energy which will produce electrical energy from the cathode pole and anode pole. The electrolysis process will occur causing the catalyst and solution to undergo a chemical process, namely the separation/decomposition of H2O, the catalyst and solution producing hydrogen bubbles which are stored in a tube. The data is then analyzed empirically and using Image-J software or similar to determine the characteristics of the flame. The analysis of the experimental data above can be compared with previous research, namely producing the highest volume of hydrogen at a percentage of 16% of 367 mL and the lowest volume of hydrogen at a percentage of 8% of 198 mL. The highest flame temperature at a percentage of 16% is 54.7 C and the lowest temperature at a percentage of 8% is 31.7C with the highest flame height at a percentage of 16% being 5.72cm and a flame width of 2.98cm and the flame brightness level (Red Green Blue) is highest at a catalyst percentage of 16% at 16 RGB and the flame brightness level (Red Green Blue) is lowest at a percentage of 8% at 2 RGB.
Electrolysis Process of Acid Acetic and Sugar Water Solution as an Alternative Fuel Gatot Soebiyakto; Sutrisno Sutrisno; Dadang Hermawan; Muhammad Ghazali Arrahim
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 2 (2023): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v6i2.5000

Abstract

One alternative energy that can be developed is hydrogen. To obtain hydrogen gas by decomposing water compounds (H2O) into hydrogen hydrogen oxygen gas (HHO) through electrolysis. The solution used in this electrolysis process uses sodium chloride (NaCl) with electric current energy. In this research, a dry cell type HHO generator was used, the electrode used was a type 304 stainless steel plate with a catalyst percentage (NaCl) of 8%, 10%, 12%, 14% and 16%. The aim of this research is to determine the hydrogen content in a solution of vinegar and sugar water which can be used as an alternative fuel. This research produced the highest hydrogen volume at a percentage of 16% of 367 mL at the highest temperature of 547 C, the lowest 317 C and the lowest hydrogen volume of 198 mL. The highest flame height is 5.72 cm and flame width is 2.98 cm and the highest flame brightness level (Red Green Blue) is 16 RGB and the lowest brightness level is 2 RGB.
Co-Authors Achmad Maulana Risky Ahmat Herman Akhmad Farid Alvin Dio Nugroho Andy Hardianto Andy Hardianto Arie Restu Wardhani Arief Rizki Fadhillah Arif Rizki Fadhillah Bagus Wahyu Pratama Chiquitita Tiara Nisa Deky Framasta Deni Prasetio Febi Rahmadianto Frida Dwi Anggraeni Gatot Soebaktiyo Gatot Soebiyakto Hangga Wicaksono Leo Hutri Wicaksono Mohammad Julio Akbar Muhammad Agus Sahbana Muhammad Ghazali Arrahim Nasution, Annio Indah Lestari Nova Risdiyanto Ismail Nurida Finahari Purbo Suwandono Purnomowati, Wiwin Silviana Silviana Silviana Silviana Silviana Silviana Suriansyah Sabaruddin Sutrisno Sutrisno Suyatno, Agus Syahroni Wahyu Iriananda, Syahroni Wahyu