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All Journal Majalah Forum Teknik UGM Jurnal Sain Veteriner Jurnal Teknoin Seminar Nasional Aplikasi Teknologi Informasi (SNATI) Jurnal Ergonomi Indonesia (The Indonesian Journal of Ergonomic) J@TI (TEKNIK INDUSTRI) Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Teknosains Jurnal Teknologi Rekayasa Mesin Journal of Engineering and Management in Industrial System Journal of Medical Physics and Biophysics The Indonesian Journal of Dental Research Majalah Kedokteran Gigi Indonesia Jurnal Ilmiah Teknik Industri Dental Journal (Majalah Kedokteran Gigi) Atrium : Jurnal Arsitektur Jurnal Sistem Teknik Industri Dinamika Kerajinan dan Batik : MAJALAH ILMIAH Jurnal Kreatif : Desain Produk Industri dan Arsitektur Jurnal Material Teknologi Proses: Warta Kemajuan Bidang Material Teknik Teknologi Proses Journal of Material Processing and Characterization (JMPC) Journal of Fibers and Polymer Composites Proceeding of International Conference Health, Science And Technology (ICOHETECH) Prosiding Seminar Nasional Unimus
Rini Dharmastiti
Department Of Mechanical And Industrial Engineering, Universitas Gadjah Mada, Yogyakarta, Indonesia
Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Veterinary

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FABRIKASI DAN PENGUJIAN TELAPAK KAKI PALSU JENIS SINGLE AXIS Wardoyo, Christianus Pigun; Mahardika, Muslim; Suyitno, Suyitno; Dharmastiti, Rini; Salim, Urip Agus; Arifvianto, Budi
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1622

Abstract

Along with the increasing number of persons with disabilities, the need for prosthetic foot has also increased. However, the irony is that some of the products circulating in Indonesia are still imported from abroad, while the domestic product is quite limited and possesses some drawbacks. This study aims to study the production process of the single axis type of the right-side prosthetic foot as well as to evaluate the performance of this product. The prosthetic foot in this research was made from thermoplastic polyurethane (TPU) resin and prepared with casting by pouring it into a pre-fabricated mold. A single-axis type of right prosthetic product could have been successfully made in this study with men's shoe sizes EU 42 and a mass of 654 g. The result of evaluation of the material and foot prosthetic product showed an average Shore hardness value of 54.3 HA. According to the result of compression test, this prosthetic product was also able withstand the highest compressive load up to 259.76 kgf. Finally, the result of fatigue test showed no damage on the foot prosthetic product until 90.000 cycle.
Evaluasi Luas Kamar Mandi pada Rumah Subsidi Untuk Lansia Widasari, Putri Pratiwi; Dharmastiti, Rini
Prosiding Seminar Nasional Unimus Vol 7 (2024): Transformasi Teknologi Menuju Indonesia Sehat dan Pencapaian Sustainable Development G
Publisher : Universitas Muhammadiyah Semarang

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Abstract

Rumah yang sangat sederhana dalam desainnya menawarkan potensi untuk efisiensi ruang, serta luasnyamemberikan ruang untuk adaptasi fungsi ruang seiring berjalannya waktu. Penelitian ini bertujuan untukmengidentifikasi atribut desain yang dapat mengakomodasi perubahan kebutuhan sepanjang sikluskehidupan, dengan fokus pada kesinambungan dan keberlanjutan hunian sederhana agar dapat dihuni secaraoptimal dalam jangka panjang. Penyebaran kuesioner dilakukan ke salah satu perumahan subsidi denganpenjualan terbanyak pada tahun 2023 di Kabupaten Kendal. Metode yang dilakukan dengan penyebarankuesioner dengan sampel melebihi jumlah yang sudah ditentukan yaitu 117 responden. Berdasarkankuesioner, ruang yang sering digunakan dengan pilihan terbanyak yaitu kamar tidur sebesar 91%. Lebarefektif yang cukup untuk sirkulasi 1 orang pengguna kursi roda 86,98 cm. Ukuran pintu satu daunmenggunakan lebar pintu 90 cm sudah dapat digunakan. Setelah semua dimensi dan persentil yang sudahdihitung untuk perhitungan luas kamar double didapatkan panjang kamar yang direkomendasikan yaitu326,98 cm berasal dari 200 cm (panjang kasur) + 40 cm (lebar almari) + 86,98 cm (sirkulasi) yang akandidesain menjadi 337 cm dengan kelonggaran 10 cm dan ukuran lebar kamar yang direkomendasikan yaitu333,96 cm berasal dari 160 cm (lebar kasur) + 173,96 cm (sirkulasi) yang akan didesain menjadi 344 cmdengan kelonggaran 10 cm. Pada perhitungan luas kamar single, lebar efektif untuk sirkulasi 1 orang denganlebar bahu menggunakan persentil 95 laki-laki sebesar 50,4 cm sehingga lebar kamar yangdirekomendasikan yaitu 200,4 cm berasal dari 90 cm (lebar kasur) + 50,4 cm (sirkulasi) + 60 cm (mejabelajar) yang akan didesain menjadi 210 cm dengan kelonggaran 10 cm dan panjang kamar disamakandengan ukuran kamar double. Kata Kunci : Rumah Subsidi, Kamar Tidur, Lansia, Luas
Coloration study heat-cured polymer materials for denture base Setiyani, Rezki; Salim, Urip Agus; Mahardika, Muslim; Dharmastiti, Rini; Arifvianto, Budi
Jurnal Teknosains Vol 14, No 2 (2025): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.104274

Abstract

The color of denture base material is important in dentistry to achieve a natural gingival aesthetic. No universal standard for denture base color, due to it difficult for dentists and dental laboratory technicians to achieve consistent results. This study proposes a method for identifying the color of artificial gums made from heated cure polymers with coloring agents. This study also examined the effect adding color agent on the hardness of denture base material and the effect of artificial saliva immersion on coloring. New coloring agents, namely pink (P), red (M), and purple (U), were added to create new colors in this study. Seven specimens from light to dark colors were made. The resulting specimens were photographed and analyzed using Adobe Photoshop software to obtain the L*, a*, and b* values for each specimen, which were then analyzed using the CIELAB formula. The results of the material hardness test showed a significant change between the immersion and non-immersion groups (p-value 0.00<0.05), while the group between 10-day and 20-day immersion showed no significant change (p-value 0.65>0.05). In materials without added color, the hardness value is 85.3 - 86.3 HSD, while in materials with added color, the hardness value increases to 85.5 - 87.7 HSD. The results of the saliva immersion test showed changes in the range of 2.51 - 5.98 for 10 days of immersion and 0.85 - 4.22 for 20 days of immersion. Based on these results, most of the color changes are still below the clinical acceptance threshold of less than 4.1. Therefore, it can be concluded that the color changes that occur after soaking are still clinically acceptable.
Noise analysis of grinding machine in the material cutting process Dharmastiti, Rini; Wijaya, Andi Rahadyan; Kurniasari, Fitri
Jurnal Teknosains Vol 14, No 2 (2025): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.105448

Abstract

The handheld grinding machine used for cutting materials has generated noise that may affect the operator and individuals nearby. The noise produced by this machine needs to be analyzed to prevent potential health impacts. This study aims to measure the noise levels the handheld grinding machine generates while cutting materials such as ceramic, metal, and natural stone. Noise measurements were taken at the noise source and distances of 2 meters, 3 meters, and 4 meters from the source. A sound level meter was used for the noise measurements. The study's results indicate that the type of material being cut using the handheld grinder does not significantly affect the noise level produced. The highest noise level was recorded when cutting the plate, with an equivalent continuous sound level (Leq) of 91.6 dB at the source. The lowest noise level was recorded when cutting ceramic material, with a Leq of 89.7 dB. Statistical tests on the distance and measurement locations at 2 meters, 3 meters, and 4 meters from the source showed that the distance does not significantly affect the noise level. At distances of 2 meters and 3 meters, the average Leq for all materials was the same, ata 94.2 dB, while at 4 meters, the average Leq was slightly lower, at 93.9 dB.
Fabrication of single-axis prosthetic foot using 3d printing and resin infusion method Rahmatika S, Devi Dwi; Arifvianto, Budi; Dharmastiti, Rini
Jurnal Teknosains Vol 14, No 2 (2025): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.105483

Abstract

A prototype of a single-axis prosthetic foot is proposed as an alternative prosthetic foot for patients with disabilities to perform daily activities. Three leading positions within 0-64% of the gait cycle are heel strike, midstance, and toe-off positions used as boundary conditions. The Finite Element Method can analyze a model to determine the values of deformation, stress, and strain that occur in detail. This research is conducted to fabricate an optimal prosthetic foot product or prototype and determine its strength to support the weight of the user's body and provide comfort and safety before being fabricated using 3D printing and resin infusion methods. The fabrication of the prosthetic foot prototype used Fusion 360 software and continued with simulation testing using ABAQUS 6.14 software. The prototype model was designed and evaluated to obtain strength and feasibility before being fabricated with an Anycubic Photon Mono X type DLP 3D printing machine and resin infusion method. The results obtained in this study show that the prototype of a single-axis prosthetic foot can support the human body's weight with loading level P3 or 60 kg, level P4 or 80 kg, and level P5 or 100 kg according to ISO 10328. The mass of the prototype or single-axis prosthetic foot product is 657 grams, according to the criteria, not more than 1.7% of the user's total body weight, with a hardness value of 55.5 HA, and can withstand 50,000 cycles in fatigue testing.
Co-Authors A.A. Ketut Agung Cahyawan W Abdullah, Muhammad J.Q. Amalia Kiswandari Andi Rahadiyan Wijaya, Andi Rahadiyan Ardiyanto Ardiyanto Arfan Fadilah Aria Fransiska Bambang Moyoretno Bambang Moyoretno, Bambang Benidiktus Tulung Prayoga Budi Arifvianto Catur Septommy Chancard Basumerda Darmanto Darmanto Dewi Arsih Sulistiani Dhirga Harisa Fadilah, Arfan Fajar Shodiq Permata Handoko Handoko Hapsoro Agung Jatmiko Hilya Mudrika Arini Ibnu Al-Taufiq Indah Pratiwi Indarto Indarto Indriany, Emmy Kurniasari, Fitri Leny Yuliatun Lientje Setyawati Lientje Setyawati Lusiana Pane Marcellino Aditya Mahendra Marsetyawan HNE Soesatyo Melita Puspitasari Mohammad Juffrie, Mohammad Muhamad Adhitya Nugroho Muhammad Mirandy Pratama Sirat Munim, Yulianda Sakinah Muslim Mahardika Nur Kaliwantoro Nuryono Nuryono Pararta, Wilhelmus A. Pipin Dwi Kartikasari Purnomo Purnomo Purnomo Purnomo Rahadyan Magetsari Rahmatika S, Devi Dwi Resti Efrata Eka Rethy Den Rina Susilowati Rusdaniaji, Danarwan Salim, Urip A. Salim, Urip Agus Salsabila, Zulfi Fathiya Saputro, Oktiyanto A. Setiyani, Rezki Siti Lestariningsih Siti Lestariningsih, Siti Siti Sunarintyas Sri Budi Barunawati Suprihatin Suprihatin Suyitno Suyitno Suyitno Suyitno Suyitno Suyitno Taufik Ramadhan Fitrianto Taufik Ramadhan Fitrianto W. Widjijono Wardoyo, Christianus Pigun Widasari, Putri Pratiwi Wijaya, Andi Rahadyan Yulianda Sakinah Munim