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All Journal Cakrawala Pendidikan SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin JTAM (Jurnal Teori dan Aplikasi Matematika) TEKNOLOGI : Jurnal Ilmiah dan Teknologi Abdi Laksana : Jurnal Pengabdian Kepada Masyarakat International Journal of Didactic Mathematics in Distance Education
Edi Supriyadi
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Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Transportation Other

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ANALISIS UNJUK KERJA ALAT PENUKAR KALOR PELAT KAPASITAS 2400 KW DENGAN ALIRAN BERLAWANAN (COUNTERFLOW) Djunaedi, Thomas; Supriyadi, Edi
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 7, No 2 (2013): SINTEK JURNAL
Publisher : University of Muhammadiyah Jakarta

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

Abstract

Base Transmission station (BTS) di daerah terpencil atau remote area memiliki kesulitan dalam penyediaan sumber listrik karena letak site yang relatif jauh dari jala-jala AC atau meskipun sumber listrik AC tersedia, namun tidak dapat diandalkan karena fluktuasi tegangan dan sering terjadinya pemadaman listrik, sehingga diperlukan cadangan energi listrik yang lain. Untuk mengatasi hal tersebut maka di site-site remote area dilengkapi diesel genset dengan kondisi running secara terus-menerus atau lebih dikenal dengan sistem konvensional akibatnya biaya operasional menjadi tinggi. Untuk mengatasi biaya operasional yang tinggi dilakukan langkah modifikasi berupa penerapan teknologi Hybrid Charge Discharge atau Hybrid CDC. Penelitian ini dibuat untuk melakukan analisa konsumsi bahan bakar diesel genset terhadap modifikasi sistem konvensional, sehingga dapat dijadikan referensi untuk kegiatan pengembangan teknologi di bidang konversi energi.  Dari hasil monitoring 2 site BTS dengan sistem Hybrid CDC di area tidak terdapat jaringan listrik diperoleh data berupa durasi Hybrid Charge discharge, konsumsi bahan bakar diesel genset, karakteristik beban harian, karakteristik beban rectifier, dan karakteristik beban Battery. Dengan sistem Hybrid CDC dapat mengurangi jam operasional diesel genset sebanyak ±70% dalam 24 jam. Akibat dari berkurangnya jam operasional tersebut maka akan berimbas kepada  konsumsi bahan bakar diesel genset dan frekuensi perawatan diesel genset. Untuk konsumsi bahan bakar diperoleh penghematan sebesar ±78% dalam 24 jam, secara keseluruhan dengan melakukan modifikasi sistem konvensional menjadi Hybrid CDC dapat diperoleh total penghematan biaya operasional BTS rata-rata sebesar Rp 350.000.000,-.
ENERGI SURYA Edi Supriyadi
Jurnal Cakrawala Pendidikan CAKRAWALA PENDIDIKAN, EDISI 2,1989,TH.VIII
Publisher : LPMPP Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/cp.v2i2.8664

Abstract

Perkembangan tingkat industrialisasi dunia yang makin tinggi menuntut kebutuhan akan enetgi yang makin besar. Di lain pihak cadangan energi, terutama yang tak terbarui seperti minyak bumi, gas dan batubara makin menipis. Matahari meupakan bentuk energi yang tepat untuk mengatasi masalah ini, karena surya matahari merupakan sumber energi yang besar, berkelanjutan, tidak polutif dan gratis. Secara tidak langsung, manfaat dari matahari yakni dapat menyebabkan adanya angin dan hujan. Sedangakan secara langsung, energi aini telah lama digunakan, antara lain; untuk menjemur pakaian yang basah, hasil-hasil pertanian, proses pembuatan garam, proses pembuatan ikan kering dan lain sebagainya.
ANALISIS PROSES PEMBUATAN DIES SQUARE DENGAN METODE DFM DI PT. HI-LEX INDONESIA Edi Supriyadi; Anthon Rudy Wardiyanto; Agus Nurrokhman; Moch Rafly Saputra
Teknologi : Jurnal Ilmiah dan Teknologi Vol 3, No 2 (2020): TEKNOLOGI : Jurnal Ilmiah dan Teknologi
Publisher : Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/tkg.v3i2.21845

Abstract

Berdasarkan penelitian yang dilakukan pada mesin milling di bagian workshop, telah ditemukan permasalahan dan beberapa hal yang perlu ditingkatkan dalam proses milling, yaitu belum ada pengukuran waktu kerja dari tahapan proses atau stasiun kerja dan perhitungan waktu baku yang bisa dijadikan acuan dalam pencapaian target. Penelitian ini dilakukan di bagian workshop pada proses pembuatan dies square di PT. HI-LEX INDONESIA. Setelah melakukan pendataan, maka dapat dibuat analisis pengukuran waktu kerja dan perhitungan waktu kerja baku untuk menentukan standar output pada mesin milling. Pada proses pengukuran waktu ini ada dua aspek yang perlu diketahui yaitu tingkat ketelitian dan tingkat keyakinan. Penelitian ini dilakukan dengan menggunakan metode DFM dan menghitung langsung waktu baku pada proses pembuatan dies square. Pada perhitungan standar waktu baku baku proses milling dalam pembuatan dies square, didapatkan hasil bahwa untuk memproduksi dies per jam, proses milling dapat menghasilkan 1 buah. Jika dihitung dalam waktu kerja 8 jam per hari, maka total standar output yang dapat diperoleh untuk membuat dies adalah 8 buah per hari.
OPTIMALISASI PELAKSANAAN PROYEK PORTA CABIN 40 FEET DENGAN METODE CRITICAL PATH METHOD (CPM) DI PT. TEPAT GUNA TEKNOLOGI NUSANTARA Faridwan Afrian; dadang kurnia; edi supriyadi
Teknologi : Jurnal Ilmiah dan Teknologi Vol 4, No 1 (2021): TEKNOLOGI : Jurnal Ilmiah dan Teknologi
Publisher : Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/tkg.v4i1.21847

Abstract

Optimalisasi Pelaksanaan Proyek Dengan Metode Critical Path Method Di PT. Tepat Guna Teknologi Nusantara. PT. Tepat Guna Teknologi Nusantara adalah perusahaan yang bergerak di bidang industri konstruksi. Tujuan penelitian ini yaitu memperoleh hasil optimal dalam pelaksanaan sebuah proyek dengan melakukan efisiensi waktu, biaya dan tenaga kerja. Metode yang digunakan adalah Critical Path Method. Critical Path Method digunakan untuk menentukan jalur kritis sebuah proyek. Metode ini memecahkan masalah dengan perhitungan maju, perhitungan mundur dan perhitungan kelonggaran waktu. Dari hasil perhitungan diperoleh 18 hari kerja, 4 pekerja dan biaya Rp. 54.237.146. Setelah dilakukan perbaikan waktu jalur jalur kritis dan perhitungan kembali diperoleh 17 hari kerja, 3 pekerja dan biaya Rp. 52.214.421. Setelah itu dilakukan perbandingan dari hasil perhitungan jalur kritis sebelum dan sesudah diperbaiki maka diperoleh efisiensi 1 hari kerja, 1 pekerja dan biaya Rp. 2.022.725.
ANALYSIS OF RTRTO60K16 PKX YARN PRODUCTION PROCESS WITH OBJECTIVE MATRIX (OMAX) METHOD Supriyadi, Edi; Junaedi, Junaedi; Oktaviani, Hanni
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 15 No. 1 (2021): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.15.1.59-67

Abstract

Productivity improvement research conducted at PT. XYZ with the core problem of minimizing waste and shortening lead time with the Objective Matrix (OMAX) method. The total percentage of product damage from January to October 2019 was 28.42% and the largest percentage of damage occurred in May amounting to 1009.26 bales of production and 33.89 bales of product damage with product damage percentage of 3.36%. The lowest damage occurred in March where the damage percentage was 2.74% with the number of products as much as 945.24 bales and damage struck as much as 25.88 bales. The results of the application using the objective matrix (OMAX) method are obtained that the selected productivity criteria include: Ratio 1 (Utility working hours), Ratio 2 (Electricity energy consumption), Ratio 3 (Labor utility), and Ratio 4 (Defective product) have a red value which means performance is still below standard performance and has not reached the target.
Knowledge mapping of Computational Thinking and Science, Technology, Engineering, and Mathematics (CT+STEM) Supriyadi, Edi; Taban, Joseph Gacusan
International Journal of Didactic Mathematics in Distance Education Vol. 1 No. 1 (2024): ijdmde
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33830/ijdmde.v1i1.7599

Abstract

Despite growing interest in Computational Thinking (CT) integration within STEM education, significant gaps remain—particularly regarding underrepresented college students, CT inclusion at the entry level, and limited teacher preparation for CT integration. This study addresses these gaps by examining how educators’ professional experiences influence their attitudes and practices related to CT in STEM contexts. It also underscores the urgent need for empirical evidence to navigate the tension between generalized critical thinking frameworks and the unique demands of scientific representations in instructional planning. To map the development and current landscape of CT+STEM research, a bibliometric analysis was conducted on literature published between 1978 and 2023. The analysis reveals a consistent annual growth rate of 7.22% in the CT+STEM domain, encompassing 241 publications across 127 scholarly sources. The study identifies key authors, institutions, and influential works, while also visualizing global collaboration patterns and thematic trends in the field. This research contributes to the advancement of CT+STEM by providing a comprehensive overview of its evolution, highlighting areas of strength and underexplored dimensions. Although the study is quantitative in nature and acknowledges limitations such as potential database bias, it lays a foundation for future inquiry into qualitative methodologies, pedagogical strategies, and inclusive practices. The findings hold significant implications for educational policy, workforce development, and digital-age problem-solving, and call for deeper exploration into the pedagogical and sociocultural dynamics that shape effective CT+STEM integration.
Discovering Ethnomathematics in Sundanese Gamelan: Explore Mathematics Aspect in Gamelan Supriyadi, Edi; Turmudi, Turmudi; Dahlan, Jarnawi Afgani; Juandi, Dadang; Sugiarni, Rani
JTAM (Jurnal Teori dan Aplikasi Matematika) Vol 8, No 3 (2024): July
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jtam.v8i3.21768

Abstract

Ethnomathematics is important in recent decades, specifically in the production of gamelan instruments. Therefore, this research aimed to examine the intricate relationship between mathematics and cultural craftsmanship in Sundanese gamelan instruments made at Gong Factory in Bogor, West Java. Ethnographic methods were used to observe and describe the practices of gamelan craftsmen and the data collection process comprised carefully selected artists. These individuals actively acquire data by reviewing relevant material, observing, analyzing, and interviewing. Miles and Huberman's framework for data analysis included data reduction, presentation, inference, and verification. The procedures understood the delicate relationship between mathematics and culture in the investigated setting. The results showed that Gong Factory in Bogor preserved and promoted a unique musical heritage. Furthermore, the instruments were known for exceptional sound quality, serving as cultural relics and didactic tools, as well as teaching visitors about the manufacturing process. The factory preserved culture through the manufacture of gamelan instruments including gong, bonang, and saron. In this context, the craftsmanship used mathematical principles, specifically precise proportions and ratios. The instruments' visual and auditory qualities depended on geometry. The results significantly impacted mathematics education by enhancing cross-cultural connections, improving proportional reasoning and mathematical comprehension, and recognizing the wider relevance of principles. Culture, mathematics, and education were connected, showing that conserving Indonesian musical tradition benefited local and global populations.
Development of Digital Comics Based on Local Wisdom to Improve Students' Mathematical Literacy Skills Sari, Indah Puspita; Supriyadi, Edi; Hidayat, Wahyu
JTAM (Jurnal Teori dan Aplikasi Matematika) Vol 9, No 4 (2025): October
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jtam.v9i4.32635

Abstract

This study aims to develop a digital comic based on local wisdom to enhance the mathematical literacy skills of junior high school students. The research employed a Research and Development (R&D) approach using the ADDIE model, which consists of five stages: Analysis, Design, Development, Implementation, and Evaluation. Data collection techniques included both test and non-test instruments. The test instrument comprised a mathematical literacy assessment designed to measure students’ mathematical literacy skills, while the non-test instruments included observation sheets, interview guidelines, student response questionnaires toward the digital comic, and validation sheets to assess the practicality and validity of the developed product. The validity and practicality data were analyzed using percentage techniques, while the effectiveness of the product was evaluated using the N-gain score. The findings indicate that the digital comic based on local wisdom achieved content and graphic component validity scores of 75.67% and 76.33%, respectively, categorized as “valid.” Meanwhile, the presentation and language components received validity scores of 66.67% and 68.33%, categorized as “moderately valid.” In terms of ease of use, visual appeal, and perceived usefulness, the instructional material was deemed “highly practical.” Test results revealed that students’ scores across all mathematical literacy indicators fell within the moderate category. Based on these findings, it can be concluded that the developed digital comic grounded in local wisdom is valid, practical, and effective for use in classroom instruction to enhance students’ mathematical literacy. From a practical standpoint, this comic offers an engaging alternative for contextual learning media. Academically, the results underscore the importance of integrating local culture and visual media in the development of innovative instructional materials.
Penyuluhan Dan Dan Pelatihan Pembuatan Sabun Cuci Piring Di Perumahan Griya Serpong Asri Cisauk Kota Tangerang Selatan Supriyadi, Edi; Dewanti, Rully Nur; Sofyan, Soleh; Junaedi, Junaedi; Kurniasih, Nia
Abdi Laksana : Jurnal Pengabdian Kepada Masyarakat Vol 1 No 3 (2020): Abdi Laksana : Jurnal Pengabdian Kepada Masyarakat
Publisher : LPPM Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/al-jpkm.v1i3.6864

Abstract

Improving social welfare can be done with various approaches, by empowering the community. Empowering PKK women in Griya Serpong Asri, Suradita, through training and assistance in washing soap production plate. This activity is carried out in order to improve human resources who is able to rely on his own strength. Specific objectives and targets This PKK ladies are interested and motivated to be achieved in this activityentrepreneurship, forming groups of PKK members who became independently independenteconomy by producing dishwashing soap, and realizing more PKKstronger, more productive, creative and responsive. To achieve this goal, teamcommunity service Industrial Engineering Study Program has provided counseling, training and assistance of PKK mothers in producing laundry soap plate. PKK ladies were given knowledge about entrepreneurs and business opportunities home based, as well as basic principles of production. PKK ladies were also given training on how to make dish soap, and product packaging marketing technique.
Co-Authors Agus Nurrokhman Anthon Rudy Wardiyanto Dadang Juandi Dadang Kurnia Dewanti, Rully Nur Faridwan Afrian Indah Puspita Sari, Indah Puspita Jarnawi Afgani Dahlan Junaedi Junaedi Moch Rafly Saputra nia kurniasih Oktaviani, Hanni Rani Sugiarni Sofyan, Soleh Taban, Joseph Gacusan Thomas Djunaedi Turmudi Wahyu Hidayat