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All Journal Teknik dan Ilmu Komputer JURNAL ELEKTRO ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika JRST (Jurnal Riset Sains dan Teknologi) TESLA: Jurnal Teknik Elektro TEKNIKA Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan Jurnal Ilmiah Teknik Industri Jurnal Darma Agung Indonesian Journal of Computing, Engineering, and Design Walisongo Journal of Information Technology Jurnal Pendidikan dan Teknologi Indonesia JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI Jurnal Teknik Sipil The International Journal of Education Management and Sociology Jurnal Pengabdian Masyarakat Charitas Jurnal Internasional Jurnal Informatika: Jurnal Pengembangan IT International Journal of Sustainable Building, Infrastructure and Environment Cylinder : Jurnal Ilmiah Teknik Mesin Widya Teknik
Melisa Mulyadi
Program Studi Teknik Elektro, Fakultas Teknik, Universitas Katolik Indonesia Atma Jaya, Jakarta
Religion Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

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PENGARUH VARIASI TEMPERATUR TERHADAP HASIL PIROLISIS OLI BEKAS Enzo W.B Siahaan; Heri Andi Sitompul; Hodmiantua Sitanggang; Maria A. Kartawidjaja; Melisa Mulyadi
JURNAL DARMA AGUNG Vol 31 No 3 (2023): JUNI
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Darma Agung (LPPM_UDA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46930/ojsuda.v31i3.3377

Abstract

Oli pelumas bekas merupakan limbah industri otomotif dalam jumlah besar yang berbahaya bagi lingkungan apabila dibakar atau langsung dibuang ke lingkungan. Berbagai metode digunakan untuk mendaur ulang minyak pelumas bekas, antara lain: proses acid-clay (proses filtrasi), proses ekstraksi pelarut (solvent extract process), dan pirolisis. Pada penelitian ini, proses pirolisis dilakukan dengan memanaskan minyak pelumas bekas di atas temperatur jenuhnya dalam reaktor bebas oksigen. Suhu pirolisis bervariasi antara 250 °C, 300 °C, 350 °C. Pirolisis dimulai pada suhu kamar (33,2 °C) dan suhu secara bertahap dinaikkan dengan laju pemanasan konstan sampai suhu pirolisis tertentu tercapai. Setelah suhu pirolisis tertentu tercapai, suhu dijaga konstan hingga proses pirolisis selesai. Hasil dari pirolisis adalah gas yang dapat terkondensasi, gas yang tidak dapat terkondensasi dan residu padat. Gas yang dapat terkondensasi kemudian dikondensasi dalam kondensor untuk menghasilkan produk cair yang berharga. Hasil penelitian menunjukkan bahwa pada suhu pirolisis 250 °C, 300 °C, dan 350 °C, dihasilkan produk cair berturut-turut mulai dari 270 mL, 400 mL, dan 600 mL dari semula 20.000 mL minyak pelumas bekas tanpa katalis. waktu ujian adalah 60 menit. Setiap 10 menit suhu diukur dan hasil yang diperoleh dalam pengujian juga diambil.
OPTIMIZATION OF INJECTION MOLDING PROCESS PARAMETER SETTINGS USING 3k GENERAL FACTORIAL DESIGN AND DATA VISUALIZATION Wilson Kosasih; Lithrone Laricha Salomon; Suhartono; Maria A. Kartawidjaja; Melisa Mulyadi
Jurnal Ilmiah Teknik Industri Vol. 11 No. 1 (2023): Jurnal Ilmiah Teknik Industri : Jurnal Keilmuan Teknik dan Manajemen Industri
Publisher : Program Studi Teknik Industri, Fakultas Teknik Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jitiuntar.v11i1.23787

Abstract

This paper discusses an experimental design approach to optimize injection molding process parameter settings according to quality targets. The method used is general factorial design, so that it can investigate the effect of each predictor variable (factor) and its interaction effect. In this study, front barrel temperature, injection pressure, holding pressure, and holding time were selected as control factors. Before testing the hypothesis, the results of the experiment are also illustrated to summarize what main characteristics phenomena the data visualization can convey us. Hypothesis testing used linear regression analysis and analysis of variance (ANOVA) with a significance level (a) of 0.05. The results demonstrated that front barrel temperature (A), injection pressure (B), holding pressure (C), and holding time (D) had a significant effect on tensile strength, but only the front barrel temperature factor had a significant effect on net weight. Front barrel temperature is the most influencing factor on the response variables. There are a significant effect of the interaction between factors, namely AB, AC, BC, ABC, ABD, BCD, on tensile strength, whereas only AB interaction has a significant effect on net weight. The optimal settings could be adjusted according to the required quality target.
Sistem Deteksi Kemurnian Beras berbasis Computer Vision dengan Pendekatan Algoritma YOLO Nova Eka Budiyanta; Melisa Mulyadi; Harlianto Tanudjaja
Jurnal Informatika: Jurnal Pengembangan IT Vol 6, No 1 (2021): JPIT, Januari 2021
Publisher : Politeknik Harapan Bersama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30591/jpit.v6i1.2309

Abstract

Penelitian ini bertujuan untuk menerapkan sistem deteksi kemurnian beras terhadap campuran kotoran untuk dapat digunakan sebagai parameter nilai untuk mensortir kotoran yang terdeteksi pada proses kontrol kualitas beras. Sistem yang dikembangkan pada penelitian ini berbasis computer vision menggunakan kamera sebagai sensor. Data citra yang didapat dari kamera selanjutnya diproses untuk mengenali objek beras yang murni dan objek kotoran yang tercampur pada kumpulan beras. Penelitian ini berfokus pada algoritma deteksi objek batu atau kerikil (gravel) pada proses produksi beras. Proses deteksi objek pada penelitian ini menggunakan metode You Only Look Once (YOLO) v3. Secara keseluruhan sistem deteksi objek pada penelitian ini berjalan baik. Proses pelatihan model berhasil meminimalisir loss secara signifikan dengan nilai loss sebesar 1.89 di iterasi ke 1000 menjadi 0.16 di iterasi ke 15000. Seiring dengan keberhasilan proses pelatihan model, pengujian model pada penerapan proses deteksi juga berjalan baik yang ditunjukkan dengan nilai rerata akurasi sebesar 86.11%.
Studi Perencanaan Ulang Perpipaan Sistem Filtrasi Air Skala Rumah Tangga Dibyo Setiawan; Jakariya; Rani Anggrainy; Linda Wijayanti; Melisa Mulyadi
Jurnal Permadi : Perancangan, Manufaktur, Material dan Energi Vol 5 No 03 (2023): JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI
Publisher : Universitas Nusa Putra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52005/permadi.v5i03.120

Abstract

Clean water is a primary necessity for human survival, but due to limited access to clean water sources, wells are often used to meet this need. However, water from wells cannot be used directly because its quality varies depending on the soil conditions. Due to these differences, a filtration system needs to be installed in the treatment of raw water from the well. In the process, well water, after being processed through the filtration system, experiences a decrease in flow rate before being stored in water tanks. This creates a problem, namely excessive electricity consumption and insufficient water flow for household use. In this research, the researcher attempts to implement the SNI (Indonesian National Standard) standards in household-scale clean water treatment, whereas previous research focused more on water quality testing. The objectives of this research are to reduce electricity consumption and increase water flow to meet household needs. Regarding the research method, the researcher conducted a literature review, data collection, pre-improvement testing, redesigned pipeline planning, performance testing of the improvement results, and analysis of the outcomes. The results of this research show that for the 1-liter container testing, the required time has increased, with the fastest time being 6.4 seconds and the slowest being 6.7 seconds, compared to the initial testing, which had a range of 13.2 seconds to 13.6 seconds. As for electricity consumption, there has been a significant decrease, from 2.76 A in the initial testing to 1.76 A, resulting in an average power consumption of 200.3 watt, compared to the previous 603.7 watt.
Inovasi Struktural: Pemanfaatan Geofoam Expanded Polystyrene (Eps) Dalam Pembangunan Infrastruktur Modern Akhmad Faishol; Linda Wijayanti; Melisa Mulyadi
Jurnal Teknik Sipil Vol. 17 No. 1 (2024): Juni 2024
Publisher : Faculty Of Engineering University 17 August 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/jts.v17i1.1595

Abstract

Bidang pembangunan infrastruktur kontemporer berada pada titik balik dalam sejarahnya, terjebak di antara tuntutan akan metode pembangunan yang ramah lingkungan dan pencarian inovasi yang tiada henti. Integrasi Geofoam Expanded Polystyrene (EPS) merupakan terobosan struktural yang menjanjikan perubahan revolusioner dalam berbagai aplikasi teknik terkait konstruksi infrastruktur modern. Tujuan dari penelitian ini adalah untuk mengetahui pemanfaatan Geofoam Expanded Polystyrene (EPS) dalam pembangunan infrastruktur modern. Penelitian ini menggunakan metode penelitian kualitatif. Jurnal ilmiah, makalah, buku, laporan penelitian, dan publikasi teknis terkait yang diterbitkan oleh instansi pemerintah, dunia usaha, dan lembaga penelitian merupakan sumber data sekunder yang digunakan dalam penelitian ini. Hasil penelitian menunjukkan bahwa Expanded Polystyrene (EPS) Geofoam merupakan bahan bangunan yang memiliki kualitas berbeda-beda sehingga menjadi pilihan tepat untuk pembangunan infrastruktur masa kini. Bobotnya yang rendah, kekuatan tekan yang tinggi, kualitas isolasi termal yang kuat, stabilitas dimensi yang konstan, ketahanan terhadap kerusakan kimia, beragam penggunaan, kelestarian lingkungan, dan keterjangkauan adalah beberapa atribut utamanya. Penggunaan EPS Geofoam pada berbagai proyek bangunan, seperti dinding penahan tanah, bandara, jalan tol, jembatan dan infrastruktur lainnya telah terbukti memberikan keuntungan besar dalam hal efektivitas biaya, kinerja struktural dan kelestarian lingkungan.
Desain Sistem Informasi untuk Pengelolaan Produksi Sarang Burung Walet Berbasis ISO 22000:2018 Anang Kukuh Adisusilo; Emmy Wahyuningtyas; Siti Gusti Ningrum; Linda Wijayanti; Melisa Mulyadi
Walisongo Journal of Information Technology Vol 5, No 2 (2023)
Publisher : Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjit.2023.5.2.18176

Abstract

The swallow's nest industry is an important sector in the food industry, especially in Asia, because the products are used in various food and beverage products. However, the sustainability and success of this industry depend on food safety and the quality of the products produced. In the context of globalization and increasing competition, it is important for bird's nest producers to ensure that their products meet international food safety standards. One standard that provides comprehensive guidelines for ensuring food safety from production to consumption is ISO 22000:2018. Efficient implementation of ISO 22000:2018 still faces difficulties such as tracking production processes, managing production processes, ensuring compliance with regulations, and responding quickly to changes in market demand. These obstacles can cause production failures and even export failures because standards are not met. By using a computer-based system, in this case, the use of an information system, especially for managing the swallow's nest production process, you can manage it more efficiently and effectively because all flows are recorded so that they can also be tracked, stored, and the data is more valid. After conducting the needs analysis, the research flow was designed to design a system starting from user interfaces, data flow design using DFD, and database design using ERD.The research results show that swallow's nest producers can improve the quality of their products to meet applicable food safety regulations by producing up to 150 ISO reporting documents to accelerate the fulfilment of consumer needs and have the impact of expanding market share. 
Pendampingan Pengolahan Lele Menjadi Abon Lele Tanpa Minyak di Desa Sampora, Tangerang Mulyadi, Melisa; Indriati, Kumala
Jurnal Pengabdian Masyarakat Charitas Vol. 1 No. 1 (2021): Jurnal Pengabdian Masyarakat Charitas Juni 2021
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Katolik Indonesia Atma Jaya Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/charitas.v1i1.2690

Abstract

The community of Sampora village, located in Tangerang, has been able to cultivate catfish. In general, the catfish that is produced is directly sold without being processed. In order to increase the economic value of catfish, it is better if catfish is processed into ready-to-eat food products whose selling price can be higher than the price of raw catfish. One of the catfish processed products that can be made is catfish shredded. Shredded catfish has high protein and low cholesterol levels. In addition, shredded catfish is a durable food, can be processed in various flavors so that it is of great interest to the public. Therefore, through community service activities, the Faculty of Engineering collaborates with Village-Owned Enterprises (BUMDES), Sampora Village to provide counseling / assistance for mothers to process catfish into catfish floss without using oil. During this pandemic, assistance was provided in the form of online tutorials. With this assistance, it is hoped that the women of Sampora village can produce shredded catfish products that can be sold in food stalls prepared by BumDes.
Pendampingan Pengolahan Pempek Lele Sebagai Alternatif Usaha Masyarakat Di Desa Sampora Mulyadi, Melisa -; Ghozali, Theresia
Jurnal Pengabdian Masyarakat Charitas Vol. 2 No. 01 (2022): Jurnal Pengabdian Masyarakat Charitas Juni 2022
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Katolik Indonesia Atma Jaya Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/charitas.v2i01.3425

Abstract

Cultivation of catfish carried out by the people of Sampora Village is certainly expected to improve the welfare of the community. It takes creativity from the community to increase the economic value of catfish through diversification of food products made from catfish, including catfish pempek. So far, people mostly use belida fish, mackerel or gabus fish as ingredients for pempek, but it turns out that catfish can also be processed into pempek because it has soft and white flesh like belida fish. Catfish besides containing high nutrition is also cheaper than other fish. If it can be producing quality catfish pempek, of course, catfish pempek can attract people to consume it because the price is more affordable. The final product of pempek is determined by its white color, elasticity, aroma and taste. There are several types of pempek that can be produced, namely pempek lenjer, pempek “keriting”, pempek “kapal selam” which contains eggs and can also be varied with sausage or cheese filling. The assistance carried out aims to equip the Sampora village community with the skills to process catfish into pempek so that it can be used as an alternative business.
Pendampingan Kegiatan Pemasaran Produk Kemasan Berbahan Lele Segar dan Lele Asap Indriati, Kumala; Mahyastuty, Veronica Windha; Mulyadi, Melisa; Silalahi, Agustinus
Jurnal Pengabdian Masyarakat Charitas Vol. 3 No. 01 (2023): Jurnal Pengabdian Masyarakat Charitas Juni 2023
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Katolik Indonesia Atma Jaya Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/charitas.v3i01.4360

Abstract

In accordance with the theme of the 77th Independence Day of the Republic of Indonesia "Recover Faster and Rise More Strong", it is necessary to revive the community's economy. Organization KNPI (Indonesian National Youth Committee) with youth organizations others in the Cisauk sub-district are trying to encourage the revival of the economy society, especially MSMEs driven by organizations youth or by citizen units. The activity held is a bazaar which is entitled “Cisauk Youth Fest”. For the implementation of this activity the Faculty Atma Jaya Unika Engineering partners with BUMDES to provide assistance in preparation for BUMDES participation in the "Cisauk Youth Fest" bazaar, which was carried out at Gate 3 of the BSD Intermodal Modern Market. This activity is in collaboration with the the manager of the BSD Cisauk Intermodal Modern Market for the provision of a place.
Pelatihan Elektronika Dasar Untuk Guru dan Siswa kelas VII Di SMP Kristen Harapan Bagi Bangsa- Cilincing Jakarta Utara Ghozali, Theresia; Wijayanti, Linda; Mahyastuti, V. Winda; Lukas, Lukas; Mulyadi, Melisa
Jurnal Pengabdian Masyarakat Charitas Vol. 3 No. 02 (2023): Jurnal Pengabdian Masyarakat Charitas Desember 2023
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Katolik Indonesia Atma Jaya Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/charitas.v3i02.5004

Abstract

SMP Kristen Harapan Untuk Bangsa is located on Jl. Kebantenan I no 10, Cilincing, North Jakarta. According to Basic Education and Culture Data (DAPOKDIKBUD), this school has 9 teaching staff. This school is also equipped with one science and computer laboratory to support the teaching and learning process . Most of the students of SMPK Kristen Harapan Bagi Bangsa come from lower-middle economic families. This condition makes students from this school not easy to get the opportunity to take courses outside school hours, due to economic difficulties . For this reason, the role of the school is expected so that students from this school still have the opportunity to enrich knowledge through learning outside school hours, namely in the form of extra-curricular activities. In order for students to have the knowledge to be able to choose a Vocational High School that suits students' talents and interests, the school facilitates extracurricular activities of Basic Electronics training. In June 2023, the Electrical Engineering Study Program, Faculty of Engineering, Atma Jaya Catholic University held a community service program with the skills taught were component introduction, measuring instrument reading techniques and making LED light circuit modules. Soldering training and making Light Emitting Diode modules were conducted for 3 days. From the results of the questionnaire, it can be seen that students are enthusiastic and claim to have gained knowledge from this training.
Co-Authors Abdul Azis Agustinus Silalahi Ahmad, Denis Akhmad Faishol Alexander Kevin Anang Kukuh Adisusilo Anthon de Fretes Anwar, Hadrian Ayu Mika Sherila Bobby Sutrisno Catherine Olivia Sereati Duma Kristina Yanti Emmy Wahyuningtyas Evans Karlin Faishol, Akhmad Ferry Rippun Gideon Manalu, Ferry Rippun Gideon FLORENTIA ANGELINA HALIM, MARCHELL MORDEKHAI Hari Prasetijo Harlianto Tanudjaja Hartanto Wibisono Heri Andi Sitompul Hodmiantua Sitanggang Jakariya Jayawarsa, A.A. Ketut Jessica Eda Joevierdi, Joevierdi Julius Bata Karangga, Yusaphat Phosa Karel Octavianus Bachri Kartadinata, Budi Kartawidjaya, Maria A Kumala Indriati Kumar, Saurav Linda Wijayanti Lithrone Laricha Salomon Luhur Bayuaji, Luhur Lukas Lukas Mahyastuti, V. Winda Maria A. Kartawidjaja Maria A. Kartawidjaja Maria Angela Kartawidjaja Marsul Siregar Nova Eka Budiyanta Pascalis Pebrianti, Dwi Pradipta, Candraruna Rani Anggrainy Reki Arbianto Sandra Octaviani B. Widiarto setiawan, Dibyo Siahaan, Enzo W.B Sidharta, So Mario Siti Gusti Ningrum Stefan Adriel Stephanie Graciela Ludony Suhartono Sutanto, Daniel Denis Tajuddin Nur Theresia Ghozali Tommy Yang Toto Tohir Veronica Windha Mahyastuty Widodo Widjaja Basuki Wilson Wilson Kosasih YANASTANTO, GUSTIESAR ALBARRY Yudha Harnoko