Article Per Year (5 Year)
p-Index From 2020 - 2025
3.753
P-Index
This Author published in this journals
All Journal Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam The Journal of Pure and Applied Chemistry Research Journal of Mechanical Engineering Education (Jurnal Pendidikan Teknik Mesin) IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Science and Technology Indonesia Jurnal Penelitian Sains IJEMS (Indonesian Journal of Environmental Management and Sustainability) VISI : Jurnal Ilmiah Pendidik dan Tenaga Kependidikan Pendidikan Non Formal Journal of Educational Research and Evaluation International Journal of Community Service Learning Molekul: Jurnal Ilmiah Kimia Edsence: Jurnal Pendidikan Multimedia Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat Jurnal Abdi Insani Jurnal Paedagogy Jurnal Teknik Industri Terintegrasi (JUTIN) International Journal of Sustainable Transportation Technology Jurnal Pengabdian kepada Masyarakat Nusantara Jurnal Kependidikan: Jurnal Hasil Penelitian dan Kajian Kepustakaan di Bidang Pendidikan, Pengajaran dan Pembelajaran Jurnal Abmas Jurnal Industri dan Teknologi Samawa (JITSA) Jurnal Insinyur Profesional Jurnal Pepadu Jurnal Guru Komputer Jurnal Ilmiah Sistem Informasi
Dedi Rohendi
Universitas Pendidikan Indonesia
Religion Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Transportation Other

Published : 34 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 34 Documents
Search

 1   2   3   4 
Identifikasi Waste Melalui Pendekatan Lean Logistics Pada Aktivitas Distribusi Material PT XYZ Fauzan, Mochamad Patra Bani; Rohendi, Dedi; Larutama, Wiku
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 8 No. 3 (2025): July
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v8i3.47047

Abstract

Inefficient material distribution at PT XYZ causes production delays in tactical vehicles and increases operational costs. This study aims to identify waste in the material distribution process using the Lean Logistics approach with the help of Value Stream Mapping (VSM) and Process Activity Mapping (PAM) tools. The analysis shows that out of a total distribution time of 6,835 minutes, only 273 minutes (4%) are value-added (VA) activities, while the remainder consists of non-value added (NVA) and necessary non-value added (NNVA) activities. These findings highlight the dominance of wasted time due to delays, transportation, and inefficient storage. The study recommends continuous improvement through lean tools and the implementation of digital technologies to accelerate distribution flow and reduce waste. This approach can enhance overall logistics efficiency and company productivity.
Investigation of Mixed MeOH:EtOH Ratio and Air Supply on MEA Performance in Direct Alcohol Fuel Cell (DAFC) Yulianti, Dwi Hawa; Rohendi, Dedi; Majlan, Edy Herianto; Rachmat, Addy; Sya’baniah, Nyimas Febrika
Science and Technology Indonesia Vol. 10 No. 4 (2025): October
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.4.1012-1019

Abstract

Methanol (MeOH) and ethanol (EtOH) are commonly used fuels in Direct Alcohol Fuel Cells (DAFC). The advantages of these two fuels are influenced by electrochemical reactions centered around the Membrane Electrode Assembly (MEA). In this study, Pt/C catalyst was used on the cathode and Pt-Ru/C on the anode, with catalyst loadings of 2, 4, 6, 8, and 10 mg/cm2. The anode and cathode were characterized using Cyclic Voltammetry (CV), while the conductivity properties were evaluated through Electrochemical Impedance Spectroscopy (EIS). The Open Circuit Voltage (OCV) of the MEA in a single DAFC cell reached 0.65 V, with the highest value observed at a MeOH:EtOH volume ratio of 70:30 at concentrations of 3 M for MeOH and 2 M for EtOH. In addition to oxidation at the anode, oxygen reduction plays a significant role in the MEA performance on the cathode side. The oxygen supply to the cathode increased the power density by 52.17% at the optimal blower voltage of 5 V.
Designing AI-Based Learning Assistant to Elevate Computational Thinking: A UX-Focused Redesign Approach Hikmawan, Rizki; Rohendi, Dedi; Septiadi, Jaka; Arrumaisha, Nissa
Jurnal Paedagogy Vol. 12 No. 4 (2025): October (IN PROGRESS)
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/jp.v12i4.16705

Abstract

This study aims to evaluate and enhance the User Experience (UX) of SEKAPAI, a web-based AI learning assistant developed to support Computational Thinking (CT) development. The initial version was assessed using Cognitive Walkthrough, System Usability Scale (SUS), and User Experience Questionnaire (UEQ), involving ten participants. Data collected from these instruments were analyzed using descriptive statistics to quantify usability scores, and qualitative feedback from the walkthroughs was subjected to thematic analysis to identify pain points. The preliminary results showed a success rate of 90%, but also revealed issues in clarity and feature navigation. Based on user feedback, the platform underwent a redesign process guided by User-Centered Design (UCD) stages, resulting in improvements in structure, interaction flow, and interface clarity. The updated prototype showed clear improvements, supported by Maze testing with a UX score of 80 ('Good') and a SUS increase to 86 ('Excellent'), and the task success rate improved to 97.14%, indicating a significant enhancement in user satisfaction and efficiency. This study not only validates the effectiveness of UCD in refining AI-based learning tools but also highlights the potential for future system development. These findings contribute to the design methodology of intelligent educational systems by aligning pedagogical goals with interactive design strategies.
Rancang Bangun Sistem Informasi Pergudangan Berbasis Mobile Menggunakan Metode Waterfall PT KAI Shandyka, Muhammad Fajar; Dedi Rohendi; Hanissa Okitasari
Jurnal Ilmiah Sistem Informasi (JISI) Vol. 4 No. 2 (2025): OKTOBER
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/jisi.v4i2.10316

Abstract

PT Kereta Api Indonesia (Persero) menghadapi tantangan efisiensi dalam manajemen gudang persediaan akibat proses yang masih manual menggunakan kartu barang fisik, sehingga pencarian material menjadi lambat dan rentan terhadap kesalahan. Penelitian ini berfokus pada perancangan dan pengembangan sistem informasi pergudangan berbasis mobile untuk membantu meningkatkan akurasi dan efisiensi proses tersebut. Metode Waterfall digunakan dalam pengembangan sistem yang mencakup tahapan analisis, perancangan, implementasi, pengujian, dan pemeliharaan. Data diperoleh melalui wawancara dengan manajer subdivisi Material Stock dan observasi di gudang Purwakarta serta Yogyakarta. Hasil penelitian menunjukkan bahwa sistem mampu menyediakan pencarian material berdasarkan nomor, nama, atau lokasi, menampilkan stok secara real time, memperbarui data foto dan lokasi, serta mendukung identifikasi cepat melalui pemindaian QR code. Uji coba dengan metode Black Box menunjukkan bahwa fungsionalitas-fungsionalitas utama yang diuji dapat berjalan sesuai dengan skenario yang dirancang. Dengan demikian, sistem ini diharapkan dapat mempercepat pencarian, menyajikan data akurat, serta mengurangi ketergantungan pada metode manual, sehingga mendukung efisiensi operasional dan transformasi digital gudang PT KAI (Persero).
Co-Authors ACHEAMPONG, KENNEDY Addy Rachmat Ade Gafar Abdullah, Ade Gafar Ade Gaffar Abdullah, Ade Gaffar Adelia, Ory Adhiyanti, Nurmalina Aip Saripudin Aldes Lesbani Amelia, Icha Ana Arrumaisha, Nissa Asep Yudi Permana Assaidah, Assaidah Barlin Barlin Bijak Riyandi Ahadito Budhi Setiawan Budi Mulyanti Dedy Suryadi Dewi, Claudia Edy Herianto Majlan, Edy Herianto Eka Daryanto, Eka Fakhili Gulo Fatma Fatmawati Fatmawati Fauzan, Mochamad Patra Bani Fauzan, Mochamad Rizal Felicity, Felicity Gigin Gantini Putri Hanapi, Zaliza Hanissa Okitasari Hanissa Okitasari Hary Widjajanti Heri Sutarno Hikmawan, Rizki Iskandar, Naufal Nadhif Rabbani Iwa Kuntadi Jefri Jefri Kamin Suamrdi Kamin Sumardi Kamin Sumardi Koehler, Thomas Larutama, Wiku Menik Setyowati Mokhamad Syaom Barliana Muhammad Adli Rizqulloh Muhammad Dzulfikar A Muhammad Faizal Muhammad Oka Ramadhan Muhammad Said MUHAMMAD SAID Muktiarni Mustika Nuramalia Handayani Nirwan Syarif Nirwan Syarif, Nirwan Normah Normah, Normah Nugraha, Agri Triya Oduro-Okyireh, George Oduro-Okyireh, Theodore Permana, Muhammad Aditya Poedji Loekitowati Hariani Pramudita, Resa Purnawan Purnawan Rahmah, Dea Ramadhan, Muhammad Oka Rasim, R Ria Komala Risfidian Mohadi Roer Eka Pawinanto, Roer Eka Salni Septiadi, Jaka Shandyka, Muhammad Fajar Siregar, Batu Mahadi Sri Haryati Steven Julianto Situmeang Subarna, Bambang Sudarsono, Wulandari Sya'baniah, Nyimas Sya'baniah, Nyimas Syabaniah, Nyimas Febrika Syarif, Nirwan Syarif, Nirwan Syarif, Nirwan Syarif, Nirwan Sya’baniah, Nyimas Febrika Tarmizi Taher Tri Kurnia Dewi Wong, Wai Yulianti, Dwi Yulianti, Dwi Hawa Yulinar Adnan Zainal Fanani