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All Journal JUTI: Jurnal Ilmiah Teknologi Informasi JURNAL ELEKTRO ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Journal of Information System Jurnal Ilmiah Universitas Batanghari Jambi CogITo Smart Journal Science and Physics Education Journal (SPEJ) MITRA: Jurnal Pemberdayaan Masyarakat Jurnal Mantik Jurnal Optimalisasi Jurnal Media Teknik dan Sistem Industri Journal of Industrial Engineering and Operation Management (JIEOM) Abdimisi Jurnal Pendidikan dan Teknologi Indonesia Industrika : Jurnal Ilmiah Teknik Industri International Journal of Multidisciplinary Research and Literature (IJOMRAL) RJOCS (Riau Journal of Computer Science) Jurnal Pengabdian Masyarakat Charitas Metris: Jurnal Sains dan Teknologi LATAR, Jurnal Arsitektur Integrasi: Jurnal Ilmiah Teknik Industri
Maria Angela Kartawidjaja
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Physics Public Health Social Sciences Other

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Kompresi Sinyal EKG menggunakan Teknik Parameter Extraction ALIWARGA, CINTHIA; PRAMUDITA, ALOYSIUS ADYA; KARTAWIDJAJA, MARIA ANGELA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 7, No 2 (2019): ELKOMIKA
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v7i2.308

Abstract

ABSTRAKSistem healthcare IoT menyebabkan peningkatan trafik komunikasi dan jumlah penyimpanan data. Elektrokardiogram (EKG) adalah salah satu alat yang berperan penting dalam healthcare IoT. Pasien yang mengalami kelainan jantung perlu dipantau oleh EKG dalam periode waktu lama sehingga menghasilkan data dalam jumlah yang sangat besar. Kompresi data mampu menjadi solusi masalah di atas. Penelitian ini melakukan kompresi sinyal EKG menggunakan metode parameter extraction untuk satu siklus sinyal dari dua belas pasien yang dipilih secara acak. Hasil penelitian menunjukkan bahwa kinerja kompresi baik, ditunjukkan oleh nilai Compression Ratio (CR) 6,24 dan Mean Square Error (MSE) 0,0018.Kata kunci: IoT, EKG, kompresi data, parameter ekstraction. ABSTRACTHealthcare IoT causing higher data communication traffic and storage. Electrocardiogram (ECG) is one of the important device in healthcare IoT. Patient whose have heart abnormality needs ECG monitoring for long period of time, this causing a big data size. Data compression become one of the solutions for this problem. This research focused on data compression using parameter extraction method for one cycle ECG signal from twelve patients.This research has a good result with Compression Ratio (CR) 6,24 and Mean Square Error (MSE) 0,0018.Keywords: IoT, ECG, data compression, parameter extraction
ANALISIS PENGARUH JUMLAH INTI PADA PROSESOR TERHADAP WEB SERVER DENGAN MENGGUNAKAN APLIKASI WEB KUESIONER Hendrik Yusmanto; Maria Angela Kartawidjaja
Jurnal Elektro Vol 9 No 2 (2016): Jurnal Elektro Unika Atma Jaya
Publisher : Prodi Teknik Elektro, Fakultas Teknik Unika Atma Jaya Jakarta

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Abstract

ABSTRAK  Penggunaan  internet dan world wide web sudah menjadi masalah yang umum. Suatu web server berfungsi untuk memroses dan menanggapi permintaan dari klien yang dikirim melalui Hypertext Transfer Protocol (HTTP). Permintaan ini seyogyanya dilayani dalam waktu yang sesingkat mungkin, yang berarti menurunkan response time dan meningkatkan throughput. Oleh karena itu, suatu web server haruslah memiliki spesifikasi perangkat yang memadai.  Salah satu perangkat keras yang mempengaruhi kinerja web server adalah prosesor. Penelitian ini bertujuan untuk menganalisis pengaruh dari jumlah inti pada prosesor terhadap kinerja web server.  Prosesor yang dipakai pada penelitian ini adalah Intel Core i5–2500 yang memiliki empat inti. Pengujian dilakukan dengan melakukan 300-1000 transaksi web kuesioner dan menggunakan perangkat lunak Apache Jmeter untuk mengatur jumlah user yang akan melakukan transaksi secara bersamaan. Pengujian dilakukan untuk satu, dua, tiga, dan empat inti prosesor. Hasil pengujian berupa throughput (request/sec). Hasil pengujian ini menunjukkan bahwa throughput tidak dipengaruhi oleh jumlah inti prosesor, yang berarti kinerja web server tidak berkaitan dengan jumlah inti prosesor. Kata kunci: Apache Jmeter, inti prosesor, throughput, web server
Assistance in Preparation of Feasibility Proposal for Catfish Cultivation in Sampora Village Christine Natalia; Ronald Sukwadi; Maria Angela Kartawidjaja; Marsellinus Bachtiar W; Stanislaus S. Uyanto
MITRA: Jurnal Pemberdayaan Masyarakat Vol 4 No 2 (2020): MITRA: Jurnal Pemberdayaan Masyarakat
Publisher : Institute for Research and Community Services

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/mitra.v4i2.1281

Abstract

The catfish farming business is one of the fastest-growing business of the agriculture fish market today. Catfish consumption is increasing because of its good taste and affordable price. Also, catfish has high protein, low in calorie and fat. However, to get more profits, cost planning is needed, as well as accurate filing of activities and costs for business sustainability. The present community service program aimed to assist how to make a feasibility proposal before starting a catfish business and also to measure the level of understanding and satisfaction of the participants of the program, who were members of the Sampora Village youth organization. The program was implemented at the Statistics and Decision Making Laboratory, Department of Industrial Engineering, AJCUI. The results show that the level of participants’ understanding in analyzing the feasibility of catfish farming increased significantly after attending the training. The participants’ satisfaction with the program was as follows: 76% very good, 19% good, and 5% neutral
Kontrol Mutu CPO di Storage Tank untuk Mengurangi Kotoran (Sludge) pada saat Pencucian dengan Melakukan Modifikasi Pipa Inlet Oil Storage Tank Kurniawan, Kurniawan; Kartawidjaja, Maria Angela; Sukwadi, Ronald; Cahyono, Budi
Science and Physics Education Journal (SPEJ Vol 7 No 2 (2024): SPEJ (Science and Physic Education Journal)
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/spej.v7i2.10721

Abstract

Penelitian ini bertujuan menunjukkan bahwa modifikasi pipa inlet pada Oil Storage Tank (OST) memiliki dampak yang signifikan terhadap akumulasi sludge dalam tanki tersebut. Sebelum modifikasi, outlet pipa berada di bagian pinggir dasar OST, yang menyebabkan akumulasi sludge terutama di bagian pinggir tanki. Hal ini kemungkinan besar mengakibatkan sludge yang sulit dihisap saat proses recycling OST. Dengan memanjangkan pipa inlet sehingga outlet-nya berada di bagian tengah dasar OST, akumulasi sludge dapat terdistribusi lebih merata di seluruh bagian dasar tanki. Dampaknya, sludge yang terbentuk cenderung berada di lokasi yang lebih mudah dihisap saat proses recycling, mengurangi jumlah sludge yang tersisa setelah pencucian OST. Data dari pencucian OST No. 1 menunjukkan penurunan signifikan dalam akumulasi sludge setelah modifikasi pipa inlet. Sebelum modifikasi, akumulasi sludge mencapai 23.430 Kg, sedangkan setelah modifikasi, jumlahnya turun drastis menjadi hanya 7.300 Kg. Ini menunjukkan efektivitas dari modifikasi pipa inlet dalam mengurangi akumulasi sludge di OST. Langkah-langkah seperti ini penting untuk meningkatkan efisiensi dan kualitas produksi di Pabrik Kelapa Sawit (PKS), karena akumulasi sludge yang tinggi dapat menyebabkan kerugian baik secara finansial maupun operasional. Dengan demikian, penelitian ini memberikan kontribusi yang berharga dalam upaya meningkatkan proses produksi CPO dengan kualitas yang lebih tinggi. Kata Kunci : Crude Palm Oil, Storage Tank, Moisture, Dirt, Sludge
Pendampingan Budidaya Ikan Lele di Desa Sampora Cisauk Natalia, Christine; Sukwadi, Ronald; Kartawidjaja, Maria Angela; Goenawan, Stephanus Ivan; Uyanto, Stanislaus Suryadi; TIrtaulima, Chelsea Naomi; Asmaralda, Naftalia
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.v1i1.2688

Abstract

This community service activity aims to develop entrepreneurship following the village's potential, namely catfish and hydroponic cultivation, often known as 'aquaponics'. One of the residents of Sampora Village, namely Pak Ali, has been engaged in catfish hatchery cultivation for many years and has become a pioneer in developing catfish cultivation to other Sampora villagers. This mentoring activity is an entrepreneurial assistance activity for catfish hatchery for Sampora villagers. The results of this activity are expected to be a productive sustainable entrepreneurship activity.
Evaluasi Kepuasan Mahasiswa Teknik Industri Terhadap Kegiatan Praktikum Dengan Metode Servqual Christata, Bellachintya Reira; Sukwadi, Ronald; Bachtiar, Marsellinus; Kartawidjaja, Maria Angela
Industrika : Jurnal Ilmiah Teknik Industri Vol. 8 No. 1 (2024): Industrika: Jurnal Ilmiah Teknik Industri
Publisher : Fakultas Teknik Universitas Tulang Bawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37090/indstrk.v8i1.1183

Abstract

In the face of competition in the field of Education, universities are required to improve the quality of the learning process. The aspects included in the learning process are practicum activities. In the Industrial Engineering study program, there are several core practicums, one of which is the Integrated Industrial Engineering Practicum. This study aims to determine the quality of current PTIT practicum activities by measuring the level of satisfaction of students who take PTIT courses. The method used in measuring student satisfaction in this paper is the Service quality method (SERVQUAL). The SERVQUAL method is a method that pays attention to 5 dimensions of service quality, namely reliability, responsiveness, assurance, empathy, and tangible. This measurement is carried out to identify student expectations and perceptions from the five dimensions of Service Quality by looking at the gap value that occurs due to the mismatch between student expectations and perceptions. The data processed in this study was questionnaire data from 30 respondents. Before the analysis was carried out, data testing was carried out with validity and reality tests. The results of this study are dimensions that are not in accordance with student expectations, including tangible, assurance, and empathy dimensions, and those that are in accordance with student expectations are dimensions of reliability and responsiveness. Keywords: Practice, SERVQUAL, Students Satisfaction
Evaluasi Ketersediaan Kapasitas Produksi Produk Keripik Singkong Menggunakan Metode Rough Cut Capacity Planning (RCCP) Kholidasari, Inna; Rizani, Miftahul Fahriyyah; Kartawidjaja, Maria Angela; Sukwadi, Ronald
Industrika : Jurnal Ilmiah Teknik Industri Vol. 8 No. 3 (2024): Industrika: Jurnal Ilmiah Teknik Industri
Publisher : Fakultas Teknik Universitas Tulang Bawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37090/indstrk.v8i3.1649

Abstract

This research is research in the area of Operations Management which are discuss the problem of production capacity planning in a production system. The availability of production capacity is the aspect that must be considered to support the production process and fulfill the target of production. The case study was carried out in a business of making and selling cassava chips which experienced an increase in demand levels. An analysis of the availability of production capacity is needed. The target of current production level is also needs to be evaluated based on forecasting results. The aims of the research is to determine the targets of production based on forecasting results and evaluate the production capacity of the case study organization using RCCP method. Forecasting methods that is deployed in this research is the Moving Average Method, Double Moving Average Method, and Single Exponential Method (∝=0,1) since the historical data to be used are time series data. Implementation RCCP method is carried out by making a Master Production Schedule, Bill of Material, and Routing File. The Findings show that there is an increasing trend in demand and the production targets set by the manager must be adjusted to the forecasting results. In terms of production capacity, a comparison of Availability Capacity and Requirement Capacity shows that the company’s production capacity is still adequate even though the demand tends to increase. Keywords: Capacity Planning, Production Capacity, RCCP
Perancangan Ulang Tata Letak Fasilitas pada Industri Garmen dengan Metode BLOCPLAN Santoso, Santoso; Heryanto, Rainisa Maini; Kartawidjaja, Maria Angela; Sukwadi, Ronald
Jurnal Optimalisasi Vol 10, No 1 (2024): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v10i01.9238

Abstract

Currently, developments and changes are occurring very rapidly in the garment industry. Technological advances and the recent Covid-2019 pandemic have led to a significant increase in online product purchases. This has had quite a big impact, as the movement of materials within the industry can change significantly. Such changes can render material movement less efficient, leading to a decrease in work productivity. Therefore, it is necessary to redesign the layout to ensure efficient material movement. The goal of this layout redesign is to minimize the total distance moved. Computer-aided layout (CAL) has garnered much interest from researchers, as it offers benefits such as generating numerous alternative layout improvements in a short time. The method used for redesigning the layout in this research is one CAL method, namely the Block Layout Overview with Layout Planning (BLOCPLAN) method. In this case study, data processing will be carried out using BLOCPLAN-90 software. The total material movement distance in the initial layout is 119,885.25 meters per month, while the total distance of material movement in the proposed layout is 61,840.33 meters per month. This indicates a decrease in the total material movement distance of 58,044.92 meters per month, or a reduction of 48.42 percent. With a decrease in the total material movement distance, it is expected that work efficiency and productivity will increase.
SCHEDULING SYSTEMS MAKE TO STOCK TO OPTIMIZING THE PRODUCTIVITY PROJECT PLANNER AT PT. GUNANUSA FABRICATORS Khaeruman, Khaeruman; Kartawidjaja, Maria Angela; Sukwadi, Ronald
International Journal of Multidisciplinary Research and Literature Vol. 3 No. 3 (2024): INTERNATIONAL JOURNAL OF MULTIDISCIPLINARY RESEARCH AND LITERATURE
Publisher : Yayasan Education and Social Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53067/ijomral.v3i3.228

Abstract

This research evaluates the effectiveness of the Make-to-stock scheduling system at PT. Gunanusa Utama Fabricators to optimize project planner productivity. The methods used include interviews, direct observation, and analysis of historical production data. The results show that implementing the Make-to-stock system increases production efficiency by maintaining stock that is ready to sell before demand arises. Challenges mainly relate to efficient stock management and complex production scheduling. This research highlights the importance of the role of project planners in facing a rapidly changing industrial environment and the comparison between manual and automatic scheduling. The implications are relevant for manufacturing companies in improving their operational performance by selecting scheduling methods that suit their unique context and characteristics
IMPLEMENTATION OF HUE SATURATION INTENSITY (HSI) COLOR SPACE TRANSFORMATION ALGORITHM WITH RED, GREEN, BLUE (RGB) COLOR BRIGHTNESS IN ASSESSING TOMATO FRUIT MATURITY Yanto`, Budi; Maria Angela Kartawidjaja; Ronald Sukwadi; Marsellinus Bachtiar
RJOCS (Riau Journal of Computer Science) Vol. 9 No. 2 (2023): RJOCS (Riau Journal of Computer Science)
Publisher : Fakultas Ilmu Komputer, Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30606/rjocs.v9i2.2428

Abstract

Tomatoes, as a type of vegetable or fruit, are often susceptible to damage, making handling them a complex challenge. Distinguishing between fresh and damaged tomatoes is very important, considering the significant impact on nutritional value and economic aspects. Traditional approaches via visual inspection have proven to be less efficient and inconsistent in their detection accuracy. To overcome this challenge, the use of images is a vital solution for distinguishing ripe, half-ripe and unripe tomatoes. In this context, HSI (Hue, Saturation, Intensity) calculations are applied to measure RGB color and room transformations. Images are extracted in jpg format, saved as training data, and this method is implemented using the Python programming language and GUI interface design in MATLAB. The research results show the HSI value for each class, with the ripe tomato class having an average hue of 0.0051 – 0.026, saturation 0.1862 – 0.3291, and intensity 0.0975 – 0.7522. Half-ripe tomatoes have hue 0.0208 – 0.0848, saturation 0.1346 – 0.5746, and intensity 0.1056 – 0.4714, while immature tomatoes have hue 0.0174 – 0.0689, saturation 0.0474 – 0.2072, and intensity 0.0595 – 0.3203. The integration of the HSI algorithm steps with the RGB color space provides an additional dimension to color analysis, which has the potential to increase the accuracy of tomato ripeness detection.
Co-Authors Adiguna, Brian Adyana, Gede Bagia Wijaya Alexander, Justin Ali, Puti Retno ALIWARGA, CINTHIA Aloysius Adya Pramudita Asmaralda, Naftalia Bachri, Karel Octavianus Bachtiar, Marsellinus Bellachintya Reira Christata Budi Cahyono Catherine Olivia Sereati Christine Natalia Edmund, Kyle Enny Widawati Gideon Manalu, Ferry Rippun Goenawan, Stephanus Ivan Hendrik Yusmanto Hotma Antoni Hutahaean Inna Kholidasari Iryanto, Mokhamad Trihandoyo Jayawarsa, A.A. Ketut Julius Bata Kartika Suhada Kurniawan Kurniawan Mamok Andri Senubekti Marsellinus Bachtiar Marsellinus Bachtiar W Marvin Chandra Wijaya Melisa Mulyadi Nova Eka Budiyanta Osmond, Edbert Rainisa Maini Heryanto Rexivio, Derys Christian Rizani, Miftahul Fahriyyah Rizki Surya Permana Ronald Sukwadi Ronald Sukwadi SANTOSO SANTOSO Silalahi, Agustinus Stania Vandika Stanislaus S. Uyanto Sutanto, Daniel Denis Theresia Ghozali TIrtaulima, Chelsea Naomi Trifenaus Prabu Hidayat Uyanto, Stanislaus Suryadi Veronica Windha Mahyastuty Vivi Arisandhy Wijayanti, Linda Yanto`, Budi Yosef Norbertus Tembu Muda Yunita, Ika