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All Journal International Journal of Electrical and Computer Engineering IAES International Journal of Artificial Intelligence (IJ-AI) Media Statistika Jurnal Ilmiah Teknologi dan Rekayasa ELKHA : Jurnal Teknik Elektro Jurnal Teknologi Rekayasa Mesin Media Mesin: Majalah Teknik Mesin Jurnal Rekayasa Mesin Turbo : Jurnal Program Studi Teknik Mesin Journal of Energy, Mechanical, Material and Manufacturing Engineering Jurnal Kreativitas PKM TELKA - Telekomunikasi, Elektronika, Komputasi dan Kontrol Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan Infotekmesin Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Journal of Applied Sciences and Advanced Technology International Journal of Marine Engineering Innovation and Research Jurnal Bakti Masyarakat Indonesia Teknosains : Jurnal Sains,Teknologi dan Informatika jurnal syntax admiration Madaniya Journal of Community Development Logic : Jurnal Rancang Bangun Dan Teknologi Jurnal INFOTEL Jurnal Keamanan Nasional ABDIKOM Jurnal Polimesin
James Julian
Department Of Mechanical Engineering, Faculty Of Engineering, Universitas Pembangunan Nasional Veteran Jakarta
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management 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 Nursing Physics Public Health Social Sciences Transportation Other

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Pemanfaatan Minyak Jelantah Sebagai Program Pengembangan Keterampilan Rumah Tangga Grand Pakis Residence James Julian; Fitri Wahyuni; Putty Fauthyda Zahra Hapidzha
Madaniya Vol. 6 No. 1 (2025)
Publisher : Pusat Studi Bahasa dan Publikasi Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53696/27214834.991

Abstract

Minyak jelantah yaitu minyak goreng yang sudah melalui proses penggunaan hasil rumah tangga dan berubah secara signifikan dari segi fisik maupun kimia. Masyarakat cenderung tidak mengetahui dampak negatif dari pembuangan minyak jelantah selama ini dan bagaimana langkah yang tepat untuk mendaur ulang atau memanfaatkan minyak jelantah menjadi sesuatu yang tepat guna. Secara sederhana, pengolahan minyak jelantah menjadi Castile Soap adalah salah satu cara yang dapat ditingkatkan guna mengurangi limbah minyak jelantah menjadi produk sabun pembersih noda. Berdasarkan permasalahan yang ada, Grand Pakis Residence merupakan tempat yang dipilih untuk melakukan pemberdayaan terhadap ibu-ibu rumah tangga dalam mengolah limbah minyak jelantah. Dengan kegiatan sosialisasi dan praktik baik pemanfaatan limbah minyak jelantah diharapkan akan meningkatkan pengetahuan ibu-ibu rumah tangga mengenai imbas dari pembuangan limbah jelantah secara tidak tepat dan meningkatkan berbagai keterampilan dalam program pengembangan pengolahan limbah minyak jelantah sehingga dapat digunakan kembali.
Comprehensive Hydrodynamic Analysis of Oscillating Flapping Mechanism for Enhanced Wave Energy Converter Technology Aldi Anggara, Rizki; Julian, James; Wahyuni, Fitri; Purba, Riki Hendra
TURBO [Tulisan Riset Berbasis Online] Vol 14, No 1 (2025): TURBO : Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i1.3786

Abstract

The comprehensive utilization of renewable energy stands as a national priority within Indonesia's strategic framework aimed at achieving the net zero emissions target by 2060. Indonesia, a nation in which nearly 70% of its territory is comprised of oceans, possesses significant potential in wave energy as a renewable energy source. This sector presents promising opportunities for development and investment. This study focuses on the three-dimensional hydrodynamic study of Wave Energy Converter (WEC) technology based on oscillating flapping through a numerical approach. The findings of the characteristic test demonstrate that the oscillating flapping device exhibits a response characterized by a deviation in the oscillating tilt angle. The direct impact of ocean waves causes the flap to shift from its equilibrium position and continuously move back and forth with a particular frequency. The dynamics working on this device show a correlation between wave input and the response that occurs. The response parameters, including maximum angular deviation, average speed, and torque, have a similar trend to changes in wave period. The influence of ocean wave activity is observed to increase within the low wave period zone up to a designated period threshold. Overall, the oscillating flapping device demonstrates enhanced performance in low wave conditions. The average maximum output power is capable of reaching 1.5 Watts on A1, 3.5 Watts on A2, and 4.5 Watts on A3.
Implementasi Pompa Sentrifugal DC dalam Upaya Penghematan Energy Listrik Guna Mendukung Proses Budidaya pada Komunitas Ikan Meruyung Fish Farm Julian, James; Yuliana, Sekar; Wahyuni, Fitri; Ramadhani, Rifqi; Anggara, Rizki; Nisa, Raysa
Journal of Community Development Vol. 6 No. 1 (2025): August
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/comdev.v6i1.1428

Abstract

Pompa air membantu menjaga kualitas air dengan memastikan oksigen tersedia dalam jumlah yang cukup, mengeliminasi sisa makanan dan kotoran, serta menyebarkan muatan organik secara merata pada kolam. Program pengabdian masyarakat yang diajukan bertujuan untuk menyediakan pompa sentrifugal DC yang inovatif dan ramah lingkungan guna mendukung keberlanjutan budidaya ikan air tawar. Meruyung fish farm adalah salah satu pelaku usaha yang memiliki permasalahan yang signifikan mengenai keterbatasan energi dalam kegiatan operasional budidaya ikan. Tim penelitian menawarkan solusi dengan melakukan pemasangan atau pengimplementasian Pompa Sentrifugal DC hemat energi. Pada program ini, kegiatan dilakukan melalui tiga tahap, yaitu tim peneliti melakukan survey lapangan untuk pengukuran, kemudian melaksanakan proses desain dan perancangan sistem, dan terakhir pengimplementasian pemasangan dan sosialisasi. Ketika tahap pelaksanaan kegiatan, sistem Pompa Sentrifugal DC berjalan dengan baik. Alat uji coba menunjukkan konsumsi daya 82 watt dengan debit 50 LPM. Hal tersebut menunjukkan bahwa alat telah bekerja dan sudah sesuai dengan harapan dari mitra.
Pembuatan Pelet Ikan Mandiri Dalam Upaya Menyejahterakan Kelompok Pembudidaya Ikan Konsumsi Air Tawar Sawangan-Parung Julian, James; Sari, Rena; Wahyuni, Fitri; Prabowo, Anton; Lumbantoruan, Regina; Hapidzha, Putty
Journal of Community Development Vol. 6 No. 1 (2025): August
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/comdev.v6i1.1429

Abstract

Kegiatan pengabdian masyarakat ini bertujuan untuk membantu kelompok pembudidaya ikan konsumsi air tawar di Sawangan-Parung dalam memproduksi pakan ikan secara mandiri guna mengurangi biaya operasional. Biaya pakan ikan diketahui mencapai 70-80% dari total biaya produksi, sehingga pengurangan biaya ini menjadi penting untuk keberlanjutan usaha mereka. Solusi yang diberikan adalah pembuatan mesin pelet dengan kapasitas produksi 20 kg per jam, yang memanfaatkan bahan baku lokal seperti tepung ikan, dedak, tepung jagung, serta bahan tambahan lainnya. Pelaksanaan kegiatan ini terdiri dari tiga tahap. Tahap pertama adalah survei lapangan untuk memahami kondisi dan kebutuhan pembudidaya. Tahap kedua melibatkan perancangan dan pembuatan mesin pelet yang mudah digunakan oleh pembudidaya setempat, serta efisien dalam memanfaatkan bahan baku lokal. Tahap terakhir berupa sosialisasi dan pendampingan kepada pembudidaya dalam menggunakan mesin tersebut.Hasil dari kegiatan ini menunjukkan keberhasilan mesin pelet dalam menurunkan biaya produksi pakan, dari Rp13.000 menjadi Rp8.000 per kilogram. Penurunan ini secara signifikan membantu mengurangi biaya operasional pembudidaya, sehingga meningkatkan efisiensi dan profitabilitas usaha budidaya ikan air tawar mereka.
SOSIALISASI RISIKO LIMBAH MINYAK JELANTAH DAN SOLUSINYA Wahyuni, Fitri; Nisa, Rasya Aulia Nathania; Julian, James; Lumbantoruan, Regina Natalindah; Mahdhudhu, Fathin Muhammad; Purba, Riki Hendra; Armadani, Elvi
Jurnal Bakti Masyarakat Indonesia Vol. 8 No. 1 (2025): Jurnal Bakti Masyarakat Indonesia
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat, Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jbmi.v8i1.34381

Abstract

Used cooking oil is cooking oil that is no longer suitable for use because it has undergone changes in physical and chemical properties during the frying process. Used cooking oil is a hazardous and toxic waste; consuming it can cause negative impacts on health and disposing of it carelessly can cause environmental pollution. However, public knowledge about the dangers and impacts of used cooking oil is still minimal. A study showed that there are still many people who dispose of used cooking oil on the ground and waterways. Therefore, the activity designed by the PKM team of Universitas Pembangunan Nasional Veteran Jakarta aims to increase public knowledge about the dangers and impacts of used cooking oil and provide solutions to reduce the pollution of used cooking oil waste. This activity was carried out in the Grand Pakis Residence housing complex using socialization and training methods. In this activity, the PKM team invited representatives from the Jalantara foundation as speakers to explain the impact of used cooking oil on the environment and health to the community. Not only that, the community was also given a training on processing used cooking oil into other products as a solution to reduce used cooking oil waste. The result of this activity is that the knowledge of residents about the dangers of used cooking oil for the environment and health has increased by 80.95%. In addition, the residents also know how to reduce used cooking oil by turning it into useful products such as soap.
UNCERTAINTY ANALYSIS OF VOLTAGE MEASUREMENT USING ATMEGA328P MICROCONTROLLER: AN ANOVA TEST APPROACH Julian, James; Fauzi, Ade Fikri; Dewantara, Annastya Bagas; Ulhaq, Faiz Daffa; Wahyuni, Fitri
MEDIA STATISTIKA Vol 17, No 2 (2024): Media Statistika
Publisher : Department of Statistics, Faculty of Science and Mathematics, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/medstat.17.2.173-184

Abstract

The voltage sensors are widely used in various applications. In certain applications, such as medical devices, autonomous vehicles, or the military, the sensor's accuracy and level of precision play an important role, making it necessary to evaluate the sensor's performance. In this research, testing of direct current (DC) voltage sensors was carried out using analysis of variance (ANOVA) and Tukey honestly significant difference (HSD) to test sensor performance in various voltage ranges. This research used an experimental-based quantitative approach, using the ATmega328P. Data collection begins by calibrating the analog-to-digital converter (ADC) readings against voltage values with linear regression, the Chauvenet criterion to eliminate outlier data caused by noise from the environment, One-way ANOVA is used to determine differences in variations between voltage distances, and a Q-Q plot is used to determine the normality of the sensor error distribution. This research obtained from Tukey-HSD that 9 comparisons accepting the null hypothesis (H0). And 27 pairs accepting the alternate hypothesis (H1). The data was found to be normally distributed through the calculation of residual ANOVA, and visualization of data with the Q-Q plot, and the use of the sensor was effective in the range of 3V to 24.5V.
The Influence of Fillet Step on Backward-Facing Step Flow Characteristics Julian, James; Anggara, Rizki Aldi; Wahyuni, Fitri
Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i2.1919

Abstract

Backward-facing step (BFS) is a model that provides several applicative features in engineering. The complex phenomena of BFS flow have a crucial impact on any application. Therefore, this study comprehensively investigates the flow characteristics of BFS with various step shapes. The backward-facing step (F-BFS) fillets were tested at intervals of Reynolds number 50 smaller than Re smaller than 400 using the CFD approach. Based on the computational results, it was found that flow separation is a fundamental phenomenon in BFS flow. Due to sudden expansion, Flow separation forms a recirculation area which continues to increase almost linearly with an increase in the Reynolds number. The recirculation area contains unstable rotating vortexes, which can impact the flow efficiency of BFS. Using a different step shape proves that F-BFS can minimize the recirculation area to increase the efficiency of the BFS flow.
Utilization of AIS Satellite Data as Behavior Information Towards Interruption Violations in the Makassar Strait Hadinata, Tri; Sutanto, Rudy; Julian, James; Yudho Prakoso, Lukman; Putra, Demo
Jurnal Keamanan Nasional Vol. 9 No. 1 (2023): JURNAL KEAMANAN NASIONAL VOL 9 NO 1 TAHUN 2023
Publisher : Pusat Kajian Keamanan Nasional (Puskamnas) Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

 Indonesia is the world’s largest archipelagic country, with a coastline of 81,000 km. Indonesia’s beaches and seas are rich in natural resources, especially marine commodities like fish. The abundance of fish in the Indonesian seas has led to crimes committed by domestic ships not equipped with documents and foreign vessels. This study aims to analyze the causes of crime in the Makassar Strait with a crime orientation in the middle of the sea. In particular, this study also examines the security monitoring process using AIS Satellite. So that in the future, the enforcement carried out by stakeholders related to sea and maritime security will become more conducive and transparent. This research method uses a qualitative descriptive approach to describe data from AIS satellites in the Makassar Strait. The data collection process is carried out by taking satellite data directly and processing it so that some information about ship types and loading and unloading activities can be known comprehensively. Then it is used to determine which ships are initially identified as committing a violation. This information is used to act effectively, efficiently, and appropriately on sea breaches. This method is expected realization that institutions and stakeholders can work together to patrol at sea and promptly act against violations at sea. The discussion location is in the Makassar Strait because the area borders other countries and is one of the locations for abundant fish resources and international shipping lanes. The data for identifying ships suspected of committing crimes in the Makassar Strait was processed from 2019 to 2022. The violations include 22 smuggling ships, 13 drug smuggling ships, and 12 offending crime ships. The data revealed significant violations. Thus, from the analysis results, it is better to need the right timing in implementing patrols and the appropriate momentum for enforcement. Therefore, AIS Satellite is expected to help and improve law enforcement in that location.
Numerical method to overcome the fluid flow separation on pipe bend 90 using guide vane Sedeq, Khalees; Julian, James; Wahyuni, Fitri; Iskandar, Waridho
TURBO [Tulisan Riset Berbasis Online] Vol 12, No 2 (2023): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v12i2.2846

Abstract

ANALYSIS OF COGGING TORQUE REDUCTION FROM DESIGN COMPUTATIONAL PERMANENT MAGNET SYNCHRONOUS MOTOR WITH TAGUCHI METHOD Wahyuni, Fitri; Julian, James; Ferdyanto, Ferdyanto; Fauzi, Ade Fikri
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1492

Abstract

Permanent Magnet Synchronous Motor (PMSM) applications include electric vehicles, industrial pumps, wind turbines, aerospace technology, and many others. In this study, cogging torque is the central aspect of the discussion, which is the motor model, the thickness of the permanent magnet rotor, and the air gap in the electric motor influence. The Taguchi method uses parameter levels on the motor, which are divided into 16 types of orthogonal arrays, where the process is carried out twice in iterations. The first stage of simulation testing was to produce the primary model where number 4 (A1B4 series) was obtained as the most optimal motor model with a cogging torque of 1.56 Nm and an air gap flux density of 768 mTesla (mili tesla). Then the second test was to modify several parts of the motor with the following 16 orthogonal array types, which produced number 8 (A2B4 series) with a cogging torque of 1.08 Nm and an air gap flux density of 733 mTesla. One of the parameters apart from the cogging torque must be maintained is the air gap flux density. This variable affects the permeability of the motor so that later it will affect the amount of material used and the production costs of electric motors. The final result is a model that produces the lowest cogging torque while maintaining other parameters on the motor.
Co-Authors Achmad Zuchriadi Ade Fikri Fauzi Adi Winarta, Adi Akmal, Reza Najmi Aldi Anggara, Rizki Anggara, Rizki Aldi Annastya Bagas Dewantara Anton Prabowo Armansyah Armansyah Armansyah Armansyah Armansyah Bagas Dewantara, Annastya Billad, Rayhan Fariansyah Budiarso Budiarso, Budiarso Bunga, Nely Toding Demo Putra Demo Putra Desta Sandya Prasvita Dewantara, Annastya Bagas Dwi Yulia Handayani Elvi Armadani Ermadani, Elvi Faiz Daffa Ulhaq Farha, Auditya Fauzi, Ade Fikri Ferdyanto Ferdyanto, Ferdyanto Firdaus, Talitha Fatiha Fitri Wahyuni Fitri Wahyuni Fitri Wahyuni Fitri Wahyuni Gunasti, Nabilah Dwi Hadinata, Tri Hapidzha, Putty Harinaldi . I Wayan, Marlon Managi Idris Marbawi Iskandar, Waridho Junaedi, Thomas Juri Saedon Kasih Prihantoro Lomo Mula Tua Lumbantoruan, Regina Lumbantoruan, Regina Natalindah Madhudhu, Fathin Mahdhudhu, Fathin Muhammad Marbawi, Idris Miftahul Jannah Mirza Fauzan Lukiano Mufti Ahmad Fadilah Nandy Putra Naufal, Ridwan Daris Nisa, Rasya Aulia Nathania Nisa, Raysa Oktavia, Nana Triana Parker Stefan, Parker Patrick, Juan Prabowo, Anton Dwi Prakoso, Lukman Yudho Prasetyo, Eko Andi Purba, Riki Purba, Riki Hendra Putty Fauthyda Zahra Hapidzha Ramadhani, Rifqi Reda Rizal Revan Difitro, Revan Ridwan Daris Naufal Rifqi Ramadhani Rizki Aldi Anggara Rizki Aldi Anggara Rizki Anggara, Rizki Rudy Sutanto Saphira Anggraita Siswanto Sari, Rena Satria, Muhammad Fari Sedeq, Khalees Toding Bunga, Nely Tri Hadinata Tua, Lomo Mula Tulus Hidayat Yusanto Ulfa Hanifah Nurhaliza Ulhaq, Faiz Daffa Waridho Iskandar Waridho Iskandar Wijaya, Anggie Topan Yuliana, Sekar Zackharia Rialmi