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All Journal Jurnal Informatika dan Teknik Elektro Terapan Prosiding Seminar Nasional Teknoka Practice of Fashion and Textile Education Journal Jurnal Teknologi Pangan dan Industri Perkebunan BULLET : Jurnal Multidisiplin Ilmu Jurnal Teknik Industri dan Manajemen Rekayasa
Rachmah Nanda Kartika
Politeknik Negeri Jakarta
Agriculture, Biological Sciences & Forestry Arts Humanities Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Medicine & Pharmacology Nursing Physics

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Pengukuran Usability Pada E-Learning Politeknik Negeri Jakarta Rachmah Nanda Kartika; Emmidia Djonaedi
Prosiding Seminar Nasional Teknoka Vol 5 (2020): Prosiding Seminar Nasional Teknoka ke - 5
Publisher : Fakultas Teknik, Universitas Muhammadiyah Prof. Dr. Hamka, Jakarta

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Abstract

Covid-19 has impacted human activities around the world, including education. Teachingandlearning activities that were originally conducted face-to-face have turned into remote teaching andlearning activities or online lectures. To support the government's ef orts to prevent Covid-19 fromspreading further, the Jakarta State Polytechnic conducts its lectures using PNJ's E-learning media. Learning media systems can be considered reliable if they can fulfill user needs, such as the ease of usingtools in E-learning. E learning must be able to be used in both theoretical and practical subjects. Theresearch targets for this study are graphic engineering, packaging printing industry technology, mechanical engineering, building construction, and energy conversion. However, these practical learningcompetencies cannot be achieved as conducted on the of line lecture. To ensure that the teaching andlearning activities using PNJ E-learning can run ef ectively, we need to measure its usability. In this study, we use USE questionnaire tool as usability measurement. The research conducted on 150 respondents showed that the level of usability in PNJ e-learning was 0,609 this figure is included in the category of goodusability level. However, this value is still within the minimun score criteria for the good category. TheValue for each variable, namely the uselfulness variable of 71.4%, the easy of use variable of 72.8%, theeasy of learning variable of 48.25% and the satisfaction of 51.2% of the long distance learning process. theory and practice using E-learning,. E-learning system's components that are improved are thebigbluebutton, attendance, login, additional notification features for student assignments, and attendance.
Penggunaan FMEA Dalam Mengindentifikasi Resiko Kegagalan Pada Proses Produksi Cetak Blok Kalender (Studi Kasus : PT. XYZ) Rachmah Nanda Kartika; Nafiah Ariq Hidayah; Muadzah
BULLET : Jurnal Multidisiplin Ilmu Vol. 1 No. 06 (2022): BULLET : Jurnal Multidisiplin Ilmu
Publisher : CV. Multi Kreasi Media

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Abstract

PT. XYZ is one of the printing companies in Jakarta. The company produces graphic products such as smart cards, the Qur'an, packaging, calendars, books, and security documents. The manufacturing production process always strives for no defective products. To minimize production failures that will occur, a system that supervises product quality is needed, called a quality control system. Printing problems that occur in PT. XYZ on the four-vel calendar product has 4 types of defects namely misregister, striped color, set-off, and dot gain. The product data for calendar block printing products in 2022 is 6500 pcs. The number of defects is high. So that the problem needs to be immediately corrected and analyzed accurately. The method used in this study was FMEA. This method identifies problems that occur in the field by identifying production factors and determining the severity of the problem through the Risk Priority Number (RPN) value. The higher the RPN value, the bigger the problem. If the bigger the problem, then the risk of the problem must be prioritized to be overcome.  Based on the percentage of each type of printing defect that occurs in PT. XYZ has the most product defects is the striped color on the vel 4 block mold. The identification results based on the three highest RPN values are caused by low-speed engines and often die, the rollers are old and do not have a densitometer measuring instrument. The main risk control measures that the company can take, namely overhaul, buying measuring instruments to replace the rollers. Then after repairs a check sheet is required.
ANALISIS DETEKSI TEPI PADA PEMINDAI DOKUMEN MENGGUNAKAN KERTAS THERMAL BERBASIS PYTHON IDE Yoga Putra Pratama; Rachmah Nanda Kartika; Pilar Febry Buwono; Muamar Abid Rabbani
Jurnal Informatika dan Teknik Elektro Terapan Vol 12, No 3 (2024)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jitet.v12i3.4917

Abstract

Dokumen merupakan salah satu bagian penting dalam berbagai proses, saat ini dokumen lebih banyak dalam bentuk digital dikarenakan kertas dapat mengalami penurunan kualitas seiring berjalannya waktu. Metode yang digunakan adalah metode kualitatif dengan menggunakan Bahasa pemrograman python dan sampel uji coba diberbagai kondisi dan hasil dari ujicoba ini adalah berupa deteksi tepi pada dokumen. Diharapkan hasil dari penelitian ini dapat dikembangkan dengan melakukan perbaikan kontur pada bagian gambar
SUSTAINABLE DYEING OF TEXTILES USING TOMATO WASTE EXTRACTS: INFLUENCE OF FESO₄ MORDANT ON COLOR QUALITY Fadiyah Ayu Rahmawati; Emmidia Djonaedi; Rachmah Nanda Kartika
Practice of Fashion and Textile Education Journal Vol. 5 No. 2 (2025): Practice of Fashion and Textile Education Journal
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/pftj.v5i2.56778

Abstract

The use of tomato waste as an effort to reduce the accumulation of organic waste and environmental pollution due to textile dyeing requires mordantt material as a color fixer. This study aims to analyze the effectiveness of iron Fe(SO₄) mordantt in dyeing cotton fabrics using natural dyes from tomato waste extract. The research was carried out by an experimental method, namely by dyeing textiles in the form of cotton cloth with dyeing techniques using the results of tomato waste extracts with variations in mordantt iron concentrations, namely 0%, 2%, 5%, and 7%. The staining results were analyzed using a spectrodensitometer to measure the CIEL*a*b* value and test the color fastness to light. The results showed that 7% iron mordant produced the most intense red-yellow color with an L* value of 64.38, an a* value of 28.7, and a b* value of 51.22. The staining results with a 7% iron mordantt had a very good color fade resistance value (scale 4-5), while the sample without a mordant had a very poor fade resistance (ΔE=25.19). Iron mordant Fe(SO₄) has been proven to have good effectiveness in producing more intense colors in fabric dyeing results and increasing color fastness in textile dyeing results with tomato waste extract.
Studi Pengaruh Pengujian Solid Content Terhadap Karakteristik Tinta Sablon Alami Berbahan Dasar Kulit Buah Naga Meraheristik Tinta Sablon Alami Berbahan Dasar Kulit Buah Naga Merah Fadhil Sukma Ramadhan; Emmidia Djonaedi; Rachmah Nanda Kartika
Jurnal Teknologi Pangan dan Industri Perkebunan (LIPIDA) Vol 5 No 2 (2025)
Publisher : Politeknik Negeri Ketapang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/rdv5dc51

Abstract

Red dragon fruit peel contains betacyanin pigment, which has the potential as a natural colorant. This study aims to evaluate the effect of solid content on the characteristics of screen printing ink made from red dragon fruit peel. Solid content plays a crucial role in determining ink quality, particularly in terms of coverage and colorfastness. Three samples were prepared with varying pigment amounts: 10 grams (A1), 15 grams (A2), and 25 grams (A3), while the gum arabic content remained constant at 20 grams. The analysis showed that sample A2 had the highest solid content at 77.29%, followed by A3 (65.27%) and A1 (64.81%). Weight loss after oven drying showed A1 had the greatest reduction (1.33 grams), while A2 had the smallest (0.72 grams). These findings indicate that increasing pigment amounts enhances solid content, positively impacting coverage and color durability in natural screen printing ink.
Analisis proses pembuatan kalender berbahan dasar kertas daur ulang dengan campuran bunga telang menggunakan pendekatan 5W1H Jaka Santosa; Sahiba Sahila; Rachmah Nanda Kartika; Rafi Aditama; Muhammad Ivan Maulana; Mafaid Rizky Pratama; Musthofa
Jurnal Teknik Industri dan Manajemen Rekayasa Vol 4 No 1 (2026)
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jtimr.v4i1.13714

Abstract

Commercial calendar production typically uses virgin paper, contributing to increased wood fiber consumption and waste. This condition encourages the development of environmentally friendly alternatives using recycled materials. This study aims to produce a desk calendar made from recycled paper mixed with butterfly pea flowers as a natural dye and aesthetic element, and to evaluate the effectiveness of its production process.The study involved several stages, including recycled paper processing (soaking, pulping, mixing with butterfly pea petals, sheet forming, drying, and cutting) and calendar assembly (cutting carton board, applying linen cover, printing A5 calendar design, punching spiral holes, installing spiral wire, and attaching a 7×7 cm glass component). The production process was evaluated using the 5W1H framework to identify key factors, constraints, and methodological effectiveness.The resulting calendar displays natural visual characteristics,coloration from butterfly pea pigment, and an additional functional element through the integration of a small glass piece. Analysis shows that paper-making is the most time-consuming stage, while the assembly process is relatively efficient.The recycled paper calendar incorporating butterfly pea flowers was successfully developed as an eco-friendly product with strong aesthetic value and added functionality. Further improvements are recommended for achieving consistent paper thickness and optimizing drying time.
Pengembangan produk ecovault berbahan limbah kertas menggunakan pendekatan Design Thinking Salma Aulia Husin; Sahiba Sahila; Rachmah Nanda Kartika; Fadillah Tri Widiawati; Florenthia Meylianthi; Kholifaturrahma; Erlangga Saputra
Jurnal Teknik Industri dan Manajemen Rekayasa Vol 4 No 1 (2026)
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jtimr.v4i1.13723

Abstract

The increasing volume of cellulose-based waste has intensified the need to utilize paper waste into products with higher functional value. This material has considerable potential to be developed into functional products when processed through a systematic design approach. This study aims to develop Ecovault, an environmentally friendly storage product made from cardboard and paper pulp, using the Design Thinking approach. During the empathize stage, a survey was conducted to identify user needs, which indicated strong support for the use of recycled materials. The define stage identified two main issues: the low utilization of paper waste and the demand for small-sized storage products with an attractive appearance. The initial concept was realized in the form of a flower-pot-shaped storage through 3D rendering and subsequently tested through prototype development. The first prototype experienced structural issues, leading to a design revision by changing the pot shape from cylindrical to box-shaped. This modification improved the stability, strength, and structural neatness of the final prototype. The results demonstrate that paper waste can be transformed into functional and aesthetic storage products through an appropriate design approach.
Co-Authors Emmidia Djonaedi Erlangga Saputra Fadhil Sukma Ramadhan Fadillah Tri Widiawati Fadiyah Ayu Rahmawati Florenthia Meylianthi Jaka Santosa Kholifaturrahma Mafaid Rizky Pratama Muadzah Muamar Abid Rabbani Muhammad Ivan Maulana Musthofa Nafiah Ariq Hidayah Pilar Febry Buwono Rafi Aditama Sahiba Sahila Salma Aulia Husin Yoga Putra Pratama