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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 Dinamika Kerajinan dan Batik: Majalah Ilmiah
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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Analisis Pengaruh Jumlah Responden pada Evaluasi Usabilitas Aplikasi Edukasi Anak-Anak Melita Puspitasari; Rini Dharmastiti
Forum Teknik Vol 36, No 1 (2015)
Publisher : Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (9630.534 KB)

Abstract

     The development in technology for children is now increasing. In order to make the design and appearance of a software/application is easy to operate, run, and understood by children, an usability test is needed. One method that popular in usability testing is thinking aloud that takes at least 3-5 samples so the optimal problem can be found during test. This study aims to determine whether the needs of the number of respondents in the thinking aloud method is still relevant today, especially when applied to children, and to determine the effect of number of children involved in the test on usability problems found.This study involved 10 children assubjects with a mean age of 10,6 years to play educational application that run on Apple Ipad 2 named Candy Factory. However, the number of respondents in usability test on children's educational application has the effect that the more the number of respondents, the more problems found but only up to 4 respondents. More than 4 respondents, the usability problems that found is decreasing because the children keep revealing the same problem. One respondentwas able to found 45,45% usability problems, and 85% usability problems found by only 4 respondents. While 100 % usability problems can be found by 9 respondents. Moreover, the result of usability test analysis and recommendations for improvement of Candy Factory are explained.Keywords: usability, number of respondent, thinking aloud, educational game, children
Optimization of Tissue Decellularization Method Based on Macroscopic and Microscopic Observation in The Sheep Peripheral Nerves Fajar Shodiq Permata; Rina Susilowati; Rini Dharmastiti; Muhammad Mirandy Pratama Sirat Mirandy Pratama Sirat; Pipin Dwi Kartikasari
Jurnal Sain Veteriner Vol 30, No 2 (2012): DESEMBER
Publisher : Fakultas Kedokteran Hewan Universitas Gadjah Mada bekerjasama dengan PB PDHI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (13252.092 KB) | DOI: 10.22146/jsv.2606

Abstract

Animal graft tissue  (xenograft) was developed  to replace the limited supply of human graft tissue (allograft). Peripheral nerve graft tissue  is needed to replace  the damage. Swine is the most developed source of tissue donor for the preparation of acellular tissue because a lot of livestocks population and its extracellular matrix components similar to human collagen. Swine xenograft development would be an obstacle in Indonesia because of socio-cultural so that sheep used as swine donor replacement. Sheep cartilage tissue acellular induced less human inflammatory mediators than swine. Xenograft is necessary to decellularizebefore implantation into human that results in only extracellular matrix. However, decellularization process varies depending on the species and methods so that it is needed a preliminary study to get the best decellularization method for sheep peripheral nerve specimens. Five samples of sheep Ischiadicus  nerves were conducted decellularization various processes and one sample of fresh nerve (control). Decellularization methods were 24 hours shaking, tissue soaking and perfusion for both 14 days and 17 days, respectively. Decellularization solution was 0.1% SDS-EDTAin PBS. Post decellularization, samples were observed macroscopically, fixed, HE staining of histopathologic examination for microscopic examination. The data were analyzed descriptively. At the macroscopic observation of post decellularization tissue showed white, and samples of soaking method showed softer consistency than that of shaking and perfusion. Microscopic examination showed that samples were not being completed decellularization at shaking method. There was destruction of collagen fibers of perineurium and endoneurium in 17 days of soaking and perfusion methods, while 14 days soaking and perfusion methods showed that samples were being completed decellularization and both perineurium and endoneurium collagen were still good. Conclusion of this study is that 14 days soaking and perfusion decellularization methods are better than that of 24 hours shaking method and 17 days of soaking and perfusion methods for sheep decellularization peripheral nerve.  
PENGEMBANGAN KUESIONER UNTUK MENGEVALUASI USABILITAS E-LEARNING Amalia Kiswandari; Rini Dharmastiti; Andi Rahadiyan Wijaya
Jurnal Ergonomi Indonesia (The Indonesian Journal of Ergonomic) Vol 2 No 1 (2016): Volume 2 No 1 Juni 2016
Publisher : Program Studi Magister Ergonomi Fisiologi Kerja Pascasarjana Universitas Udayana Denpasar Bekerjasama dengan Perhimpunan Ergonomi Indonesia (PEI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JEI.2016.v02.i01.p01

Abstract

Interface design of e-learning sometimes people see only as a choice, not the main point. But, the basic thing about interface is it the main tool that have function to give user direction about how is using e-learning because it covers all element in e-learning. Usability is the tool that can measure the effective interaction between user and interface to achieve specific purpose. Questionnaire is a tool that practical, efficient and the most using tool to evaluate the usability. But, there is not yet a specific questionnaire in Indonesia that can evaluate usability of e-learning in general.The purpose of this study is to develop a measuring tool which is questionnaire that can capture usability problems in e-learning, know the usability questions attributes that become themost influence on the evaluation of the usability case studies in e-learning, and evaluate the problem of usability in the case study with the questionnaires which have been developed. The object of this study is an e-learning developed by the University of Gadjah Mada, namely eLisa, Synthesis (Faculty of Economics and Business), Gamel (Faculty of Medicine), and Papyrus (Department of Electrical Engineering and Information Technology). A sample of 317 respondents.The results of this study are valid and reliable questionnaire, and obtained 14 usability dimensions with 56 variables question from factor analysis result. This questionnaire has the consistency and relevance with the problems that reflected in open-ended questions, covered views from the mean value of merit usability. The comparison of four e-learning is a consistent ratings between the average value of variable merit 56 questions on the contents of the variable 5 questions in the concluding section. The result of comparisons with other questionnaires showed that the questionnaire is more effective because it can cover 73.21% of the existing problems in a more specific eLisa and evaluate a problem of usability.This research can still be developed and refined from research object of e-learning are more general by a combination of respondents from several countries to prove the relationship of user characteristics in terms of preference, culture, and language affect the evaluation of each individual to the usabiltity of e-elarning.
PERSEPSI IKLIM KESELAMATAN DAN HUBUNGANNYA DENGAN SAFETY BEHAVIOR DI INDUSTRI BETON PRACETAK Lusiana Pane; Rini Dharmastiti
Prosiding SNST Fakultas Teknik Vol 1, No 1 (2019): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 10 2019
Publisher : Prosiding SNST Fakultas Teknik

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Abstract

PT.X merupakan perusahaan yang bergerak dibidang industri beton pracetak. Perusahaan ini termasuk ke dalam perusahaan besar dengan risiko tinggi terhadap kecelakaan kerja. Perusahaan mempunyai target zero accident, tetapi pada kenyataannya target ini tidak pernah tercapai. Salah satu aspek penting  dalam keselamatan kerja adalah safety behavior. Oleh karena itu perlu  dilakukan kajian untuk mengetahui hubungan antara persepsi safety climate dengan safety behavior, serta faktor safety climate yang paling kuat pengaruhnya terhadap safety behavior pada karyawan PT.X. Untuk mengetahui hubungan antara safety climate dan safety behavior digunakan metode regresi linier berganda. Jenis penelitian yang dilakukan adalah penelitian kuantitatif dengan metode survei. Data dikumpulkan dengan menyebarkan dua jenis kuesioner, yaitu kuesioner safety climate NOSACQ-50 yang terdiri dari tujuh dimensi dan kuesioner safety behavior. Kuesioner disebarkan kepada 84 responden dengan metode Purposive Sampling. Hasil penelitian menunjukkan secara simultan safety climate mempunyai pengaruh yang signifikan terhadap safety behavior sebesar 69,8%. Hal ini menunjukkan bahwa hubungan antara ketujuh variabel independent secara bersama dengan variabel dependent kuat. Variabel yang paling kuat pengaruhnya terhadap safety behavior adalah variabel komitmen pekerja terhadap keselamatan kerja dan variabel keadilan manajemen keselamatan kerja.Kata kunci: beton pracetak, safety behavior, safety climate, NOSACQ-50
PENGARUH KONSENTRASI PROTEIN PADA PELUMAS TERHADAP KEAUSAN ULTRA HIGH MOLECULAR WEIGHT POLYETHELENE (UHMWPE) UNTUK APLIKASI SENDI LUTUT TIRUAN . Darmanto; Dharmastiti Rini
Prosiding SNST Fakultas Teknik Vol 1, No 1 (2011): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 2 2011
Publisher : Prosiding SNST Fakultas Teknik

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Abstract

Polimer UHMWPE telah digunakan secara luas sebagai komponen tibial berpasangan dengan titanium alloy, stainless steel(SS), cobalt chrom alloy dan ceramic sebagai komponen femoral pada sendi lutut tiruan. Bovine Serum(BS) digunakan sebagai pelumas karena memiliki karakter yang mirip dengan pelumas sendi. Penelitian ini bertujuan melihat pengaruh konsentrasi protein dalam BS sebagai pelumas pada sendi lutut tiruan terhadap keauasan UHMWPE yang bergesekan dengan SS 316L. Penelitian ini menggunakan bahan UHMWPE virgin dan SS 316L yang diimplantasi dengan ion nitrogen dengan energi 100 KeV, arus 100 μA, waktu implantasi 90 menit. Pengujian menggunakan mesin undirectional pin on flat (POF) dengan kecepatan 70 mm/s, beban 180 N dan volume pelumas 15 ml selama 360 jam. BS sebagai pelumas divariasikan konsentrasi proteinnya 30 g/l dan 50 g/l ditambahkan sodium azide(NaN3) 0,2% - 0,3% g/l sebagai anti bakteri. Hasil penelitian ini memperlihatkan bahwa faktor keausan UHMWPE virgin berpasangan dengan SS 316L implantasi tidak menunjukkan perbedaan yaitu 6,59 x 10-8 mm3/Nm pada konsentrasi protein 30 g/l dan 50 g/l. Kata kunci : UHMWPE, SS 316L, Bovine serum, faktor keausan
EVALUASI PRODUK KAKI PROSTETIK BAWAH LUTUT BERDASARKAN PERSEPSI PENGGUNA USIA 15-64 TAHUN Taufik Ramadhan Fitrianto; Rini Dharmastiti
Prosiding SNST Fakultas Teknik Vol 1, No 1 (2019): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 10 2019
Publisher : Prosiding SNST Fakultas Teknik

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Abstract

Kaki prostetik adalah alat bantu yang digunakan untuk menggantikan alat gerak tubuh bagian bawah yang hilang karena amputasi atau bawaan sejak lahir. Penelitian ini mengevaluasi produk kaki prostetik bawah lutut lokal yang beredar di masyarakat dengan melibatkan 20 pengguna aktif untuk melihat apakah produk yang digunakan sudah dapat mengakomodir kebutuhan difabel. Evaluasi menggunakan template Prosthetic Evaluation Questionnaire. Hasil evaluasi menunjukkan bahwa pengguna masih mengalami masalah utama terkait fleksibilitas selama pemakaian kaki prostetik, disebabkan lecet pada stump setelah pemakaian dalam jangka waktu yang lama. Berdasar masalah tersebut, dapat dilakukan perbaikan seperti menggunakan silikon sebagai material pelapis socket yang memiliki karakteristik lebih lunak namun kesat.Kata kunci: evaluasi produk, kaki prostetik bawah lutut, prosthetic evaluation questionnaire 
ROLE OF REDUCING CELL LEAKAGE IN CELL CULTURE USING LARGE PORE SIZE PERMEABLE MEMBRANE Nur Kaliwantoro; Marsetyawan HNE Soesatyo; Indarto Indarto; Mohammad Juffrie; Rini Dharmastiti; Suprihatin Suprihatin
Jurnal Teknosains Vol 6, No 1 (2016): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.27192

Abstract

Permeable membranes are widely used in many in vitro studies using cell culture. Some cell leakage are often occurs when using permeable membrane with large pore size. Unfortunately the use of permeable membrane with smaller pore size in permeability studies faces some difficulties due to its small pore size and pore density. Recent study provides the protocol in using permeable membrane with large pore size with smaller cell leakage. Vero cell line (CCL-81, ATCC) was used and culture on polyester permeable membrane with 3 µm pore size. Visualization using inverted microscope was used to analized the cell leakage on the permeable membrane. Parallel plate flow chamber was used to analized the permeability performance of the Vero cell cultured on the permeable membrane. The result showed that the current technique is significant in reducing cell leakage of the cell cultured on large pore size of permeable membrane. The same results were found in using polyester and polycarbonate permeable membrane.
PENGEMBANGAN ALAT UKUR EVALUASI DAN PERANCANGAN PRODUK KURSI RODA Hapsoro Agung Jatmiko; Rini Dharmastiti
Jurnal Teknosains Vol 7, No 2 (2018): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.28222

Abstract

A wheelchair is one of the mobility aids for people with disabilities. Availability of wheelchair type is very decisive for users based on the limitations they have. The problem felt by users in Indonesia today, especially in Yogyakarta, is that users have not got the right kind of wheelchairs with the needs, with certain limitations. This study aims to develop a wheelchair evaluation and to know the user's expectation of the wheelchair design. This study shows that there are problems due to the users not getting a wheelchair that suits their needs. The wheelchair design that the users want are the wheelchair with 3 wheels and have new feature.
Analisis Aktivitas Otot Dengan Perbedaan Jenis Kelamin Pada Postur Tangan Menggunakan Surface Electromyography Indah Pratiwi; Purnomo Purnomo; Rini Dharmastiti; Lientje Setyawati
Jurnal Ilmiah Teknik Industri Vol. 16, No. 2, Desember 2017
Publisher : Department of Industrial Engineering Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v16i2.5207

Abstract

This study aims to analyze the muscle activity in the upper body of the hand posture. Measurements are made when the workers perform the activities of making pottery in a sitting position. Measurements use surface electromyography and differentiate sex between men and women. The research steps were: (1) worker capture resulted in ten postures, (2) determination of muscle influences, namely: extensor carpi radialis muscle, extensor carpi ulnar muscle, extensor of the wrist muscle, biceps brachii muscle, flexor carpi radialis muscle, and (5) calculate using root mean square (RMS) and RMS value index RMS value and deviation index RMS value of male - higher than women in each muscle and in every posture.
Pengaruh posisi dan fraksi volumetrik fiber polyethylene terhadap kekuatan fleksural fiber reinforced composite (The effect of position and volumetric fraction polyethylene fiber on the flexural strength of fiber reinforced composite) Catur Septommy; Widjijono Widjijono; Rini Dharmastiti
Dental Journal (Majalah Kedokteran Gigi) Vol. 47 No. 1 (2014): March 2014
Publisher : Faculty of Dental Medicine, Universitas Airlangga https://fkg.unair.ac.id/en

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (433.54 KB) | DOI: 10.20473/j.djmkg.v47.i1.p52-56

Abstract

Background: Composite resin is a combination of filler and matrix. The additional of fiber in the composite resin has a function as load-bearing in mastication. Polyethylene fiber has been used as a reinforced to receive the forces on the fixed denture fiber reinforced composite (FRC). Purpose: The purpose of this study was to determine effect of position and olumetric fraction of fibers on the flexural strength and modulus polyethylene FRC. Methods: This study used 7 groups with variations in the position and the volume of fiber. Group I, position compression volume 1 sheet; group II, 2 volume compression sheet position; group III, volume 1 sheet neutral position; group IV, neutral position volume 2 sheets; group V, position tension volume 1 sheet; group VI position tension volume 2 sheets; and group VII without fiber. Each group consisted of 6 samples and FRC rod-shaped samples with size (25 x2 x 2) mm. Samples were tested by three-point bending test with a universal testing machine. The data were analyzed by two-way Anova and LSD test continued (α = 0,05). Results: Group VI had the highest mean flexural strength than others (360.74 MPa) and group IV had the highest flexural modulus than others (3.56 GPa). The flexural strength and modulus with the variation of position or volume showed a significant differences (p<0.05), while the interaction between position and volume showed no significant difference (p>0.05). Conclusions: The position fiber on tension and additional two strips on volumetric fiber affected the increasing flexural strength and modulus of FRC.Latar belakang: Komposit merupakan gabungan filler dan matriks. Penambahan fiber pada komposit berfungsi sebagai penahan beban pengunyahan. Polyethylene fiber telah digunakan sebagai penguat dalam menerima gaya-gaya pada gigi tiruan cekat fiber reinforced composite (FRC). Tujuan: Penelitian ini bertujuan untuk mengetahui pengaruh posisi dan fraksi volumetrik fiber pada kekuatan fleksural polyethylene FRC. Metode: Penelitian ini membuat 7 kelompok sampel polyethylene FRC dengan variasi posisi dan volume fiber. Kelompok I, posisi compression volume 1 lembar; kelompok II, posisi compression volume 2 lembar; kelompok III, posisi netral volume 1 lembar; kelompok IV, posisi netral volume 2 lembar; kelompok V, posisi tension volume 1 lembar; kelompok VI, posisi tension volume 2 lembar; dan kelompok VII, tanpa fiber. Setiap kelompok terdiri atas 6 sampel dan sampel berbentuk batang FRC dengan ukuran (25x2x2) mm. Sampel diuji dengan three-point bending test dengan universal testing machine. Data dianalisis dengan two-way anova dan dilanjutkan uji LSD (α=0.05). Hasil: Rerata kekuatan fleksural kelompok VI paling tinggi (360.74 MPa) dan kelompok IV memiliki modulus fleksural tertinggi (3.56 GPa). Kekuatan dan modulus fleksural dengan variasi posisi atau volume menunjukkan perbedaan bermakna (p<0.05) sedangkan interaksi antara posisi dan volume menunjukkan perbedaan tidak bermakna (p>0.05). Simpulan: Posisi fiber pada sisi tension FRC dan penambahan volume 2 lembar fiber akan meningkatkan kekuatan fleksural FRC.
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 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