Article Per Year (5 Year)
p-Index From 2021 - 2026
0.92
P-Index
This Author published in this journals
All Journal Rekayasa Mesin Jurnal Pendidikan dan Teknologi Indonesia Society: Jurnal Pengabdian Masyarakat
Prasdika, Tegar Oki
Unknown Affiliation
Computer Science & IT Economics, Econometrics & Finance Education Engineering Languange, Linguistic, Communication & Media Mechanical Engineering Social Sciences

Published : 5 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 5 Documents
Search

 1 
Analisis Numerik Performa Propulsi Kapal Ikan guna Meningkatkan Efisiensi dan Gaya Dorong Menggunakan Pendekatan CFD (Computational Fluid Dynamics) Prasdika, Tegar Oki; Bahatmaka, Aldias; Kriswanto, Kriswanto; Darsono, Febri Budi
Jurnal Pendidikan dan Teknologi Indonesia Vol 5 No 5 (2025): JPTI - Mei 2025
Publisher : CV Infinite Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52436/1.jpti.771

Abstract

Indonesia merupakan negara maritim dengan sumber daya perikanan yang melimpah, menghadapi berbagai permasalahan dalam sektor perikanan, khususnya terkait dengan kapal ikan. Beberapa masalah utama termasuk mematuhi regulasi, menggunakan kapal dengan teknologi yang tidak memadai, dan praktik penangkapan ikan yang merusak lingkungan. Penelitian ini bertujuan untuk menghitung nilai torsi dan gaya dorong yang dihasilkan dari baling-baling kapal ikan dalam meningkatkan efisiensi kapal. Metode yang digunakan dalam penelitian ini menggunakan pendekatan CFD (Computational Fluid Dynamics) menghitung dan mensimulasikan pengaruh gaya dorong dan torsi pada baling-baling terhadap sudut kemiringan poros 0°, 30°, 50°, dan 60°. Sebelum melakukan simulasi, proses validasi telah dilakukan dengan nilai error di bawah 5% dalam kondisi lurus tanpa kemiringan. Hasil dari penelitian ini menunjukkan bahwa baling-baling dengan posisi kemiringan 50° memiliki nilai gaya dorong dan torsi yang optimal dengan nilai gaya dorong 55809 N dan torsinya adalah 72111,5 Nm. Hal ini hasil analisis tersebut pada Propeller kapal ikan dapat berdampak besar pada kesejahteraan nelayan, keberlanjutan lingkungan, dan efisiensi operasional. Desain Propeller yang lebih efisien, hambatan hidrodinamis yang lebih rendah, dan efisiensi bahan bakar dapat dicapai melalui hasil simulasi CFD yang optimal.
ANALYSIS OF THE THRUST ON PROPELLER SHAFT ANGLE ON FISHING VESSEL USING CFD Prasdika, Tegar Oki; Bahatmaka, Aldias; Andriano, Kriswanto
Jurnal Rekayasa Mesin Vol. 16 No. 2 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i2.2073

Abstract

Indonesian fishing vessels need a prime mover capable of propelling the vessel forward and backward. According to data from the Ministry of Maritime Affairs and Fisheries, many vessels in Indonesia are spread across various State Fisheries Management Areas of the Republic of Indonesia waters. Most of the ships are in the State Fisheries Management Area of the Republic of Indonesia, 712 area, from a total of 4,989 vessels found in the area. This study aims to determine the thrust and torque values generated from the propeller using Ansys CFD (Computational Fluid Dynamics) software to determine the thrust force on the ship. The method used is the operation of the Ansys Fluent program on a computing device to calculate and simulate the effect of thrust on the propeller against the tilt angle of the shafts at 0°, 5°, 10°, 20°, 30°, 40°, 50°, and 60°. Before simulating, a validation process has been performed with an error below 5% in straight conditions without tilt. The results show propellers with various shaft angles have different thrust and torque values. In the simulation of a 50° tilt angle, the thrust value is 55809 N and the torque is 7211.15 Nm, while at a 60° tilt angle, the thrust value is 54582.4 N and the torque is 6193.81 Nm. Therefore, the propeller tilt position of 50° has the appropriate thrust and torque and can produce the optimal thrust force compared to other angles.
Application of Science and Technology to Improve Productivity, Quality, and Marketing of Mocaf Bolen in Semarang City Bahatmaka, Aldias; Ardiansari, Anindya; Fibriana, Fidia; Hidayat, Indra Nurul; Sari, Linda; Mayangsari , Effelie Dewi; Prasdika, Tegar Oki; Sandi Pratama , Fajar Rizqi
Society : Jurnal Pengabdian Masyarakat Vol. 4 No. 6 (2025): November
Publisher : Edumedia Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55824/0cmdjb05

Abstract

Micro, Small, and Medium Enterprises (MSMEs) make a significant contribution to economic growth, job creation, community empowerment, and the reduction of economic inequality. By 2023, MSMEs' contribution to Indonesia's GDP is projected to reach 61%, equivalent to IDR 9,580 trillion. The MSME sector absorbs 97% of the national workforce, representing approximately 117 million workers. The number of MSMEs also continues to grow each year, reaching 66 million in 2023, an increase from 65 million in 2022 (KADIN). MSME mentoring is a concrete step in supporting national aspirations, including increasing quality employment, encouraging entrepreneurship, developing creative industries, and supporting infrastructure development. In alignment with the SDGs, this PKM activity helps increase village community income and reduce income disparity. Additionally, MSMEs can apply appropriate technology (TTG) developed through university innovations. In this PKM program, the university’s IKU achievements for students and lecturers relate to IKU 2 and IKU 5, aligning with RIRN in the food sector concerning MSME empowerment for local food processing through TTG. The mentoring provides tangible benefits, with Appropriate Technology such as the Automatic Grinding Machine and Automatic Proofer Machine, resulting in a production increase to 500 Mocaf bolen per day from the original 350, reflecting a 42.86% rise. Furthermore, product diversification training was conducted by processing Mocaf flour into higher-value products such as Bolen Mocaf cookies and Mocaf Banana Bread. Digital marketing and business website mentoring were also implemented to strengthen promotional media, enabling products to access broader and potentially global markets
Strengthening 3D Model Design Learning by Utilizing Website-Based Onshape 3D to Improve the Competence of Students at SMKN Jateng in Semarang Bahatmaka, Aldias; Darsono, Febri Budi; Irawaty; Prasdika, Tegar Oki; Laksono, Aryo; Habibullah, Muhammad; Muclisin, Choirul Anton
Society : Jurnal Pengabdian Masyarakat Vol. 5 No. 1 (2026): Januari
Publisher : Edumedia Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55824/fm0xbg40

Abstract

This community service is an implementation of science in the field of Design / Engineering, especially 3D object design. The Indonesian creative industry sees great opportunities with 3D design. This is closely related to the development of information technology that is increasing every year. Knowing how to create 3D objects will open up job opportunities for the current generation. In addition, it is also one way to attract scientific interests to the University level, especially in the Mechanical Engineering Department. In facing increasingly fierce global competition, it is very necessary The purpose of this community service program is to provide training in creating 3D objects to vocational school students because there is no comprehensive training on the process of creating 3D objects and their supporting tools. as an effort to improve design skills and also at the same time capture students' interests and talents to be able to learn early about one of the sciences in the Mechanical Engineering Department. 3D object design begins with how to create 3D objects with website-based Onshape3d. Onshape3d with a website was chosen because it is open source or free. Onshape3d's ability to create 3D objects and create 3D animations has long been recognized, because it is open source. To prevent creativity support from becoming a burden, it is hoped that this will become a source of innovation for participants. To assess the effectiveness of the training, student understanding was evaluated through Quizizz before the pre-test and after the post-test of the activity. The pre-test results showed that students' initial understanding of 3D design concepts and CAD software was still relatively low, with an average score of 45%. Their knowledge was still limited to the basic functions of modeling software. After the training, the post-test evaluation showed a significant improvement: the average score jumped to 76%, reflecting a better understanding of 3D design concepts and skills in using OnShape 3D.
Strengthening Education on the Importance of Ethical use of Chatgpt in the Compilation of Student Written Works at Sma Negeri 1 Kedungwuni, Pekalongan Regency Khumaedi, Muhammad; Bahatmaka, Aldias; Rumondang, Juwita Ria; Bahatmaka, Antama; Fahmi, Fiqri Fadillah; Prasdika, Tegar Oki; Laksono, Aryo; Habibullah, Muhammad; Muclisin, Choirul Anton
Society : Jurnal Pengabdian Masyarakat Vol. 5 No. 1 (2026): Januari
Publisher : Edumedia Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55824/1jysh665

Abstract

Learning media in the computer and internet era can help teachers and students learn better. ChatGPT is an AI system that enables conversational interaction through text, can help students understand complex subject matter and improve their learning outcomes. Because the answers are This application is very popular with students because it is well-structured and can solve problems in a short time. However, AI technology, especially Generative Pre-trained Transformer (Chat GPT), has been very important for the advancement of education. In addition, it has an impact on student creativity, originality, and their learning process. This study collected data on student perceptions of the ethics of using ChatGPT. In addition, the written work created was evaluated for its quality. It is hoped that the results of this study will improve our understanding of the possibilities and difficulties of integrating ChatGPT in education. The results of the training on understanding the ethics of using ChatGPT in writing scientific papers for students of SMA Negeri 1 Kedungwuni, Pekalongan Regency, obtained several conclusions: The training was carried out smoothly to students covering the ethical material of using ChatGPT with the quality of creating appropriate prompts and an understanding that AI as a writing aid needs to evaluate the output AI provides. In addition, by holding training, students' abilities in utilizing GPT Chat as a tool in writing papers have increased
Co-Authors Aldias Bahatmaka Andriano, Kriswanto Anindya Ardiansari Antama Bahatmaka, Antama Darsono, Febri Budi Fahmi, Fiqri Fadillah Fidia Fibriana Hidayat, Indra Nurul Irawaty Kriswanto Kriswanto, Kriswanto Laksono, Aryo Mayangsari , Effelie Dewi Muclisin, Choirul Anton Muhammad Habibullah Muhammad Khumaedi Rumondang, Juwita Ria Sandi Pratama , Fajar Rizqi Sari, Linda