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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

Author-ID : 253247

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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The Effect of Varying Water to Powder Ratios on the Microhardness and Microstructure of Mineral Trioxide Aggregate Rethy Den; Rini Dharmastiti; Nuryono Nuryono; Leny Yuliatun; Widjijono Widjijono
Journal of Material Processing and Characterization Vol 1, No 2 (2020): Articles
Publisher : Departmen Teknik Mesin dan Industri, Fakultas Teknik, Universitas Gadjah Mada

The composition of water and powder in a mixture is one of the common problems in application as clinicians typically estimate the ratio chairside. The purpose of this study was to investigate the effect of varying water-to-powder ratios on the microhardness and microstructure of mineral trioxide aggregate (MTA). ROOTDENT MTA was investigated. One gram of cement was mixed with 0.28, 0.33, and 0.40 grams of distilled water and was stored for 1, 7, and 28 days in the water. Samples were subjected to x-ray diffraction (XRD), scanning electron microscopy (SEM), and microhardness tests. Tricalcium silicate, dicalcium silicate, zirconium dioxide, calcium carbonate, and calcium hydroxide were detected by XRD. SEM showed the presence of amorphous, porous capillary channel and capillary structure on the surface of the specimens. The SEM image for each water-to-powder ratio of the surface of the material was indistinguishable from the other. The highest microhardness was exhibited by the MTA specimen with the 0.33 water-to-powder ratio submerged in the water for 28 days.

PENGEMBANGAN DESAIN SEPEDA ANAK USIA 7-12 TAHUN MENGGUNAKAN METODE RAPID ETHNOGRAPHY DAN SCAMPER Marcellino Aditya Mahendra; Rini Dharmastiti
ATRIUM: Jurnal Arsitektur Vol. 6 No. 2 (2020): ATRIUM: Jurnal Arsitektur
Publisher : Lembaga Penelitian dan Pengabdian pada Masyarakat (LPPM) Universitas Kristen Duta Wacana Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21460/atrium.v6i2.116

Title: Design Development of Bike for Kids (7-12 y.o) using Rapid Ethnography and SCAMPER Method Children by nature growth relatively fast. Their body expand in a short time that demand many things that they wear or use to meet their body accordingly. This to include also the need for their bicycle. In order to fulfill the needs of children’s comfort in cycling, some bicycles which are suitable with anthropometry of children’s body are required. With the existence of bicycle’s design which has longer durability than children’s bicycles in general, hence the children’s bicycle which will be designed would have sustainable design concept. Clark et al. (2009) states that sustainable design is a design concept which integrates 3 kinds of elements (people, profit, planet) and not merely an environmental-friendly concept. Developing a product with sustainable concept is not only done with a manipulation on materials which are bio-degradable, but also could be done with extending the lifespan of the product. Respondents which are targeted on this planning are children aged from 7 until 12 with their parents, since the children on this age range experience rapid growth. Not only the interests of the children aged from 7-12 as primer users which are concerned, but also their parents as secondary users. This matter is resulted from how the parents also play a role in choosing and buying the bicycle which will be used by their children.

Evaluasi Canting Elektrik (Cantrik Lama) Sebagai Dasar Perbaikan Dalam Pengembangan Canting Elektrik (Cantrik) Studi Kasus di Balai Besar Kerajinan dan Batik Siti Lestariningsih; Rini Dharmastiti; Bambang Moyoretno
Dinamika Kerajinan dan Batik: Majalah Ilmiah Vol 30, No 1 (2013): Dinamika Kerajinan dan Batik
Publisher : Balai Besar Kerajinan dan Batik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22322/dkb.v30i1.952

AbstrakBeberapa kekurangan yang terjadi dalam penggunaan canting tradisional menjadi dasar Balai Besar Kerajinan dan Batik melakukan penelitian tentang rekayasa canting listrik (cantrik), mengingat begitu pentingnya alat tersebut dalam pembuatan batik khususnya batik tulis. Penelitian ini bertujuan untuk mengevaluasi cantrik lama sebagai dasar perbaikan dalam pengembangan cantrik supaya diperoleh cantrik yang sesuai dengan keinginan pengguna. Penelitian dilakukan di Balai Besar Kerajinan dan Batik, pengambilan data tentang evaluasi cantrik lama dengan kuesioner I, data kebutuhan dan keinginan pengguna diketahui dari kuesioner II yang diolah berdasarkan metode Kano dan QFD. Hasil evaluasi dari cantrik lama adalah tidak ergonomis, untuk memperoleh cantrik yang sesuai keinginan, faktor teknik yang perlu diperbaiki dalam pengembangan cantrik yaitu: mekanisme, model sesuai dengan pekerjaan, kualitas bahan, ukuran sesuai dengan antropometri, keringanan bahan, dan kekuatan bahan. Kata Kunci: Canting elektrik, evaluasi, faktor teknis AbstractSome disadvantages which are found in utilization of traditional canting, are the main reasons for Balai Besar Kerajinan dan Batik in conducting research to develop an electrical canting (Cantrik), given the importance of these tools in batik making process, specifically written batik. This research aims to evaluate old cantrik, as a basic to develop it into a cantrik which fulfill the needs of batik makers.This research is conducted at Balai Besar Kerajinan dan Batik. The data about old cantrik evaluation are collected using questionnaire I, while data of users’ requirements are obtained using questionnaire II, which then are proceeded using Kano method and QFD. The evaluation results of old cantrik show that it does not meet ergonomic requirements. To obtain appropriate cantrik, it needs some technical factor improvements, namely: mechanism, suitable model for work, quality of materials, sizes according to Anthropometry, Materials light weight, and strength. Keywords: Electrical canting, evaluation, technical factor

PENGEMBANGAN ALAT PELEPAS LILIN UNTUK PRODUK KERAJINAN BATIK KULIT (THE DEVELOPMENT OF WAX REMOVER FOR LEATHER BATIK PRODUCT) Rini Dharmastiti; Yulianda Sakinah Munim
Dinamika Kerajinan dan Batik: Majalah Ilmiah Vol 36, No 2 (2019): Dinamika Kerajinan dan Batik : Majalah Ilmiah
Publisher : Balai Besar Kerajinan dan Batik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22322/dkb.v36i2.4930

Kerajinan batik kulit merupakan kerajinan batik pada bahan kulit samak. Salah satu proses pada batik kulit yang masih menjadi masalah adalah proses melepas lilin dari kulit, karena alat tekan yang dipunyai mempunyai kapasitas yang terbatas dan belum memenuhi kaidah ergonomika. Pekerja yang melakukan aktivitas melepas lilin mempunyai postur kerja membungkuk, kaki menekuk, bahu terangkat ke atas dan tangan terus menerus berada pada posisi tidak netral. Dengan adanya alat press yang baru, memberi dampak baik pada postur kerja. Software CATIA V5R20 digunakan untuk memodelkan pekerja saat melepas lilin dari kulit dan digunakan untuk menganalisa postur kerja. REBA merupakan metode yang digunakan untuk melakukan evaluasi postur kerja. Hasil analisis postur kerja menunjukkan bahwa pekerja dengan menggunakan alat pres generasi pertama mempunyai risiko tinggi dengan skor REBA sebesar 12 dan 10. Pengembangan desain alat pres membuktikan dapat mengurangi risiko dari sangat tinggi menjadi sedang, dan dapat meningkatkan produktivitas melepas lilin dari kulit berupa sandal sebesar 67%, tas sebesar 86% dan dompet sebesar 88%.

Bacterial adhesion of Streptococcus mutans to cobalt chromium recast alloys Dewi Arsih Sulistiani; Widjijono Widjijono; Rini Dharmastiti
Majalah Kedokteran Gigi Indonesia Vol 7, No 2 (2021): August
Publisher : Faculty of Dentistry, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/majkedgiind.53329

Cobalt chromium (CoCr) alloys are utilized to make dental prosthesis. Casting CoCr alloys is a common operation in dentistry laboratories due to its low cost. Casting surplus (metal remaining in the sprue and crucible former) is frequently reused by dental laboratories to reduce and recycle metal waste. However, the quality and safety of these recast alloys require further information. Microbial attachment to the surface of metal prostheses may affect its quality and safety. Biofilm formation on metal surface can cause biocorrosion and secondary infection. The effects of different proportions of recast Cobalt Chromium alloy on the bacterial adhesion are not clear. The purpose of this study was to investigate how recasting affects the Streptococcus mutans (S. mutans) adhesion. Twenty disk-shaped specimens (n= 20, allocated for 5 groups) were prepared from CoCr alloys (Remanium GM; Dentaurum) with different proportions (100% new alloy, 25% recast alloy, 50% recast alloy, 75% recast alloy, and 100% recast alloy). After the immersion of the specimens in bacterial suspension for 24 hours, the number of bacteria that adhere to the specimen’s surface was counted using Colony Forming Units. Data were analyzed with one-way ANOVA (α = 0.05). The bacterial adhesion was significantly affected by the recast alloys (p < 0.05). An increased proportion of CoCr recast alloys showed an increase in S. mutans adhesion to the specimen surface.

Perbandingan Sifat Keausan UHMWPE Terhadap Commercially Pure Titanium (CP-Ti) Dan Stainless Steel 316L Untuk Aplikasi Sendi Lutut Buatan Benidiktus Tulung Prayoga; Rini Dharmastiti; Suyitno Suyitno; Arfan Fadilah
Jurnal Material Teknologi Proses: Warta Kemajuan Bidang Material Teknik Teknologi Proses Vol 1, No 1 (2015)
Publisher : Departemen Teknik Mesin, Sekolah Vokasi, Universitas Gadjah Mada.

Titanium dan stainless steel 316L telah banyak dipakai sebagai material implan karena sifat tahan korosi, kekuatan dan biokompabilitas yang baik. Permasalahan utama pada implan persendian adalah keausan dari implan tersebut. Penelitian ini bertujuan untuk mengetahui sifat keausan UHMWPEterhadap dan commerciall pure titanium (CP-Ti) dan stainless steel 316L untuk aplikasi sendi lutut buatan.Pada penelitian ini uji keausan yang digunakan adalah metode reciprocating pin on flat (RPOF) sesuai dengan ASTM F732-00. Pin UHMWPE digesekkan pada plat yang bergerak bolak-balik di bawah pin. Durasi pengujian selama 20 x 105 siklus dan pengambilan data kehilangan aus diambil pada durasi setiap 250.000 siklus menggunakan timbangan dengan ketelitian 0,001 gram.Hasil penelitian ini menyatakan bahwa kekerasan 316 L lebih tinggi dibandingkan material CP-Ti. Bahan 316 L lebih tahan goresan dibandingkan material CP-Ti. Material UHMWPE yang berpasangan dengan stainless steel 316L memiliki ketahanan aus yang lebih baik dibandingkan dengan material UHMWPE yang berpasangan dengan CP-Ti. Lapisan oksida pada CP-Ti mudah terlepas sehingga keausan meningkat. Mekanisme keausan yang terjadi adalah keausan adesif dan abrasif.

The Effect of Gain-Loss Framing Information on Risk Attitude during Coronavirus Disease (COVID-19) Pandemic Muhamad Adhitya Nugroho; Rini Dharmastiti; Hilya Mudrika Arini
Proceeding of International Conference on Science, Health, And Technology 2021: Proceeding of the 2nd International Conference Health, Science And Technology (ICOHETECH)
Publisher : LPPM Universitas Duta Bangsa Surakarta

This study aims to identify risk attitude and analyze its changes by presenting information related to COVID-19 pandemic with gain-loss framing. 152 respondents aged 18-23 years, with the status of active undergraduate students or fresh graduates, and stayed in Special Region of Yogyakarta Province, Indonesia, participated in this study. RiBy using lottery choice questionnaire to measure risk attitude in initial condition, it is found that 47% of respondents tend to be risk averse, which is being uncomfortable with risk. 28 selected respondents join the gain-loss framing experiments that present series of video news related to COVID-19 pandemic with predetermined tone (gain or loss). Hypothetical gamble survey based on video news are used to measure risk attitude after the experiment. It is known that gain framing information affects someone to be risk averse, while loss framing information makes someone to be risk seeking or feeling comfortable to any risk in decision making. Media coverage are recommended to use gain framing information to control human behavior and support government's policy in complying health protocols and stay at home during COVID-19 pandemic.

PERANCANGAN PRODUK KAKI PROSTETIK BAWAH LUTUT BERDASARKAN BERBAGAI KRITERIA PENGGUNA USIA 15-64 TAHUN Taufik Ramadhan Fitrianto; Rini Dharmastiti
Jurnal Kreatif : Desain Produk Industri dan Arsitektur Vol. 11 No. 1 (2023): Vol.11, No. 1, April 2023
Publisher : Indonesian Society of Applied Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46964/jkdpia.v11i1.358

Amputasi kaki bawah lutut merupakan salah satu penyebab disabilitas. Penyandang disabilitas atau difabel memerlukan alat bantu untuk dapat beraktivitas secara normal. Salah satu peralatan kesehatan yang dapat membantu mobilitas penyandang disabilitas amputasi kaki adalah kaki prostetik. Evaluasi rancangan produk dilakukan menggunakan Prosthetic Evaluation Questionnaire. Hasil evaluasi dijadikan landasan perancangan produk untuk menjawab kebutuhan pengguna. Setelah diketahui nilai evaluasi produk, selanjutnya dilakukan perancangan ulang produk berdasar ekspektasi pengguna dengan mempertimbangkan masukan expert sebagai acuan. Proses perancangan menggunakan metode pairwise comparison untuk mengetahui bobot kebutuhan yang diharapkan pengguna. Hasil pembobotan digunakan untuk mengevaluasi konsep produk yang diusulkan menggunakan metode Quality Function Deployment (QFD). Perancangan ulang produk menghasilkan spesifikasi produk yang dapat mengakomodir kebutuhan pengguna. Produk yang dihasilkan menggunakan bentuk endoskeleton, socket silicon, telapak kaki rigid dan terbuat dari material kayu dan spons. Produk yang dihasilkan memiliki beberapa keunggulan dibanding produk kaki prostetik referensi, diantaranya struktur kaki prostetik yang lebih kuat, perawatan lebih mudah, serta ketahanan yang lebih baik.

AN ANALYSIS : RELATIONSHIP BETWEEN WORKLOAD AND MENTAL HEALTH ON HEATHCARE WORKERS Salsabila, Zulfi Fathiya; Dharmastiti, Rini
JEMIS (Journal of Engineering & Management in Industrial System) Vol 12, No 1 (2024)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

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

Mental health is an important part in addition to physical health. Mental health problems are also faced by health workers due to the relatively high burden in their work. Based on the targets of the Sustainable Development Goals (SDGs), mental health is one of the areas of health and well-being. On the other hand, excessive workload is a source of fatigue, which is the root of burnout. The purpose of this study is to analyze the relationship between workload and mental health of health workers in a hospital. This study used a non-experimental method, namely cross sectional. Data were obtained from 49 respondents through a survey using an online questionnaire distributed by convenience sampling method. Respondents consisted of doctors (specialist and general), nurses, midwives, and pharmaceutical technical personnel. The workload questionnaire was adopted from the NASA-TLX, while mental health used the MBI-TBI. Relationship analysis was conducted using PLS-SEM using SmartPLS 4.0. The workload results obtained from this study were 65.87 or in the high category, with an allocation of very high workload of 27%, high as much as 53%, somewhat high 18%, and medium 2% of the total respondents. Factors related to mental load, physical load, and effort are the most dominant factors. The results for mental health obtained that emotional exhaustion in health workers is in the medium category (51%), personal achievement in the high category (80%), and for depersonalization in the high category (57%). The results of the correlation test between workload and the three factors on mental health found that workload has a significant relationship with the factors of emotional exhaustion and depersonalization (cynicism) with a probability of both <0.005, namely 0.000 and 0.001. The results of this study indicate that workload in health workers affects mental health, namely emotional exhaustion by 0.457 and depersonalization by 0.397. Thus, in order to maintain the mental health of health workers, intervention recommendations need to be made according to the results of this study.workload; mental health; healthcare workers, NASA-TLX; PLS-SEM

Characterization of UHMWPE/PEG Filament and Its Solid Form after 3D-Printing with Fused Filament Fabrication Arifvianto, Budi; Abdullah, Muhammad J.Q.; Dharmastiti, Rini; Suyitno, Suyitno; Salim, Urip A.; Mahardika, Muslim
Journal of Fibers and Polymer Composites Vol. 3 No. 1 (2024): Journal of Fibers and Polymer Composites
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jfpc.v3i1.140

In recent decades, ultra-high molecular weight polyethylene (UHMWPE) has gained recognition and widespread utilization as an outstanding polymeric biomaterial for load-bearing components in artificial joints. Despite its promise, this material presents challenges in processing with additive manufacturing techniques. Efforts have been underway to investigate and enhance its printability with the additive manufacturing, aiming to facilitate the production of patient-specific implants. This study aims to prepare UHMWPE-based filament through extrusion and subsequently print it with fused filament fabrication (FFF) 3-dimensional (3D) printer to create a simple rectangular sheet. Characterizations by using Fourier-transform infra-red (FTIR) spectroscopy and differential scanning calorimetry (DSC) were conducted to assess the chemical compositions and thermal properties of the UHMWPE filament and its printed forms. The findings of this research demonstrate the feasibility of printing UHMWPE filament filament within the temperature range of 200 - 240 °C. Analysis of the FTIR and DSC spectra reveals no evidence of impurities introduced during the preparation and printing processes that could alter its properties.

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

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