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All Journal Jurnal Manajemen dan Organisasi ASEAN Journal of Systems Engineering Majalah Forum Teknik UGM Jurnal Teknoin TEKNIK Dentika Dental Journal SPEKTRUM INDUSTRI Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Teknosains OPSI Journal of Engineering and Management in Industrial System Sinergi Media Mesin: Majalah Teknik Mesin Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) Jurnal Sistem dan Manajemen Industri Tekinfo | Scientific Journal of Industrial and Information Engineering Journal of Energy, Mechanical, Material and Manufacturing Engineering Indonesian Journal of Chemistry Conference SENATIK STT Adisutjipto Yogyakarta Jurnal Desain Idea: Jurnal Desain Produk Industri Institut Teknologi Sepuluh Nopember Surabaya RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi Jurnal Riset Teknologi Industri Dinamika Kerajinan dan Batik : MAJALAH ILMIAH IGKOJEI: Jurnal Pengabdian Masyarakat Jurnal Litbang Kota Pekalongan Destinesia : Jurnal Hospitaliti dan Pariwisata Makara Journal of Technology JURNAL TEKNIK INDUSTRI Innovative: Journal Of Social Science Research Applied Science and Technology Research Journal RADIAL: Jurnal Peradaban Sains, Rekayasa dan Teknologi Dinamika Kerajinan dan Batik: Majalah Ilmiah

Alva Edy Tontowi

Department Of Mechanical And Industrial Engineering, Universitas Gadjah Mada, Yogyakarta, Indonesia

Author-ID : 404849

Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation Veterinary Other

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Perbandingan Metode Rasional Dengan Kreatif Untuk Mendesain Alat Bantu Pasang Lampu Rudy Firman Prakosa; Alva Edy Tontowi
Forum Teknik Vol 33, No 2 (2010)
Publisher : Faculty of Engineering, Universitas Gadjah Mada

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

Abstract This article discusses the result comparison of design process of lamp installation device using rational and creative methods and its usability analysis. The study was conducted through team recruitment, prototype development, prototype selection, and usability testing. The teams recruited involved creative team (K-team) consisting of experienced technical expert and non-exact students, and rational team (R-Team) consisting of exact students with knowledge in product design method. Result of prototype selection using weighted objectives method showedthat rational prototype produced higher total weight compared to that of creative prototype. Usability testing were also conducted in terms of rational and creative prototype methods. Usability testing involved learnability, error, efficiency of use, and satisfaction. Result of usability testing showed that rational prototype had higher efficiency of use, lower error, and higher satisfaction level. Therefore, rational method becomes better design process in lamp installation device. Keywords: product design, creative method, rational method, usability, device

KAJIAN AWAL ANALISIS ATRIBUT YANG BERPOTENSI MEMPENGARUHI TINGKAT PENDANAAN PADA PROYEK 3D PRINTER DI PLATFORM CROWDFUNDING KICKSTARTER Nugraha Muharafandy; Alva Edy Tontowi
Prosiding SNST Fakultas Teknik Vol 1, No 1 (2019): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 10 2019
Publisher : Prosiding SNST Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (177.035 KB)

Salah satu alternatif mendapatkan modal bisa diperoleh dari penggalangan dana (crowdfunding). Dari keseluruhan proyek 3D Printer yang sukses pada platform Kickstarter, tidak semua proyek berada pada level pendanaan yang sama, oleh karena itu perlu untuk mengetahui hal-hal yang menyebabkan terjadinya perbedaan level pendanaan tersebut. Penentuan atribut yang berpotensi memiliki pengaruh terhadap level pendanaan dalam penelitian ini adalah dengan menggunakan pendekatan klasifikasi algoritma Random Forest dan AttributeWeight. Penelitian ini menghasilkan 3 atribut yang paling berpotensi terhadap level pendanaan, serta beberapa rule keputusan yang dapat menjadi acuan bagi creator untuk meningkatkan potensi dan peluang mendapatkan perolehan donasi pada platform crowdfunding.Kata kunci: 3D Printer, Crowdfunding, Data Mining, Funding level, Kickstarter, Random Forest.

EFEK APLIKASI SERICIN PADA HIDROKSIAPATIT TERHADAP PERLEKATAN SEL OSTEOBLAS Siti Sunarintyas; Yeni Yustisia; Alva Edy Tontowi
Jurnal Teknosains Vol 1, No 1 (2011): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.3989

Hydroxyapatite (HA) is often used as a human bone graft. Modification of HA surface is developed to increase osseointegration process which is influenced by cells attachment surrounded the tissue. Sericin has polar side groups which accelerate cells attachment. The aim of this research was to determine the effect of sericin application over HA surface on the attachment of osteoblast cells. The research used HA synthesized from gypsum (Kulon Progo, Yogyakarta). Sericin was extracted from silkworm cocoons of Bombyx mori. Sericin of 0.01, 0.05, 0.1% were applied over HA discs surface (10 mm in diameter, 3 mm thick). The discs were inserted into osteoblast cells culture of MC3T3E1 for attachment test. The data were analyzed by ANOVA and LSD. The result showed that the amount of osteoblast cells attached to HA (7.60±0.42) was significantly difference (p<0.05) with HA + sericin 0.01% (10.30±0.52), HA + sericin 0.5% (10.63±0.70), HA + sericin 0.1% (10.67±0.87). Variation of sericin concentrations applied over HA did not influence any significant difference on the amount of cells attachment (p>0.05). In conclusion, sericin application over HA surface increased the amount of osteoblast cells attachment. Concentrations of sericin application over HA (0.01, 0.05, 0.1%) did not influence osteoblast cells attachment.

SCAFFOLD DARI BOVINE HYDROXYAPATITE DENGAN POLY VYNIALCHOHOL COATING Alva Edy Tontowi, Punto Dewo, Endang Tri Wahyuni, dan Joko Triyono
Jurnal Teknosains Vol 1, No 2 (2012): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.5978

In Indonesia, it is about 40% patients with hard tissue defect due to ostheoporosis, cancer or accidents and therest are defect since they have born.For many years, efforts for recovering have been done by transplantation orimplantation methods.Transplantation is more appropriate butit is not sustain because of limited donor, whileimplantation using synthetic materials such as bioceramics scaffoldis expensive due to import and the scaffold iseasier to break which does not match to the medical requirements.The research therefore has been addressed to thisissue. Local bovine hydroxyapatite (bHA)scaffold has been used as thebase material and poly vynilalchohol (PVA)as a coating material.The bHA scaffold was prepared by cutting a fresh bovine bone in the size of 5mmx5mmx5mmand boil it in a distilled water to remove its organic material. It was then heated up at 900 oC for 2 hours infurnace to obtain bovine hydroxyapatite scaffold (bHA). Coating process has been carried out by dip coating of thebHAscaffold in PVA solution.

EVALUASI KOMPLIKASI PLATE EXPOSURE PASCA RESEKSI AMELOBL ASTOMA MANDIBULA DENGAN REKONSTRUKSI PELAT TITANIUM DI RSUP DR. SARDJITO YOGYAKARTA Maria Goreti Widiastuti; Marsetyawan HNE Soesatyo; Rahardyan Magetsari; Alva Edy Tontowi
Jurnal Teknosains Vol 5, No 2 (2016): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.24222

Resection of the jaw is a primary option of treatment in mandibular ameloblastoma with bone damage. Mandibular resection will cause mandibular stability disturbance due toloss of some part of the bone. Instability of the mandible can cause aesthetic, physiological, and psychological malfunctioning. To restore its stability, installment of mandibular reconstruction plate on the remaining mandibular by using screws. However, it is not uncommon that plate exposure occurs following mandibular reconstruction, caused by inaccurate adaptation of the plates to the mandibular bone. A 3D stereolithography modelcan help provide the best assesment on the bone defect, plan the making of the more easily pre-operative curved plates and provide more accurate faster surgery time. Objective: To evaluate plate exposure after mandibular resection with titanium reconstruction plates in Dr. SardjitoHospital. Case report: A case was reported on mandibular reconstruction after resection of ameloblastoma with titanium plate performed in Dr. Sardjito Hospital that experienced intra-oral plate exposure and oro-cutaneous fistula on the left mandible. The clinical evaluation showed the curved titanium plate did not adapt well with the remaining mandibular bone; therefore, the titanium plate was removed without replacing it with a new plate. Inappropriate adaptationof curved titanium plate is one of the main causes of plate exposure. The use of a 3D stereolithography model is very helpful for the success of mandibular reconstruction.

Improvement of Andong Horseshoe Quality in Yogyakarta City to Support City Tourism Alva Edy Tontowi; Mochammad Noer Ilman; Dawi Karomati Baroroh
Jurnal Pengabdian kepada Masyarakat (Indonesian Journal of Community Engagement) Vol 7, No 1 (2021): March
Publisher : Direktorat Pengabdian kepada Masyarakat Universitas Gadjah Mada

The Zero Kilometer Point is an important route for andong horses in Yogyakarta City. The renovation and replacement of road material with andesite can cause horses to slip because the horseshoes have not been adjusted to the new road material. If neglected, it can harm the horses and its owners, reducing the tourism industry in Yogyakarta. On the other hand, horseshoes demand is still met by small and medium enterprises (SME) without a well-standardized system. After doing technical testing to the existing horseshoe design, several alternative solutions were obtained for horseshoe redesign (1) by adding rubber pads and (2) serrated without rubber pads. Based on analysis and testing, it was found that horseshoe with the addition of rubber by 40% was able to increase the friction value to 0.54 or 10% from the initial condition. Besides improving the productivity and quality of SME horseshoe products, several solutions should be considered, including (1) change the layout design of SME by implementing 5S lean six sigma principles and (2) apply new methods/technology to maintain the standardization of horseshoe product. Implementation of both solutions will guarantee not only the quality product but also SME production. It is hoped that all the improvements that have been made will increase the quantity and quality of horseshoe products. Then it will also be able to improve the image of Yogyakarta City as a tourist city.

THE EFFECT OF 3D PRINTING MACHINE PARAMETERS IN EXTRUSION PROCESS OF BIOCOMPOSITE MATERIALS (PMMA AND HA) ON DIMENSIONAL ACCURACY Raeshifa Diani Almy; Alva Edy Tontowi
SINERGI Vol 22, No 2 (2018)
Publisher : Universitas Mercu Buana

Bone implants are medical procedures involving replacement or reconstruction of missing or damaged bones with the patient's ones, natural substitutes or artificial substitutes. The widely used bone cement is a polymethylmethacrylate (PMMA) based composite material. To improve bioactivity, PMMA is combined with hydroxyapatite (HA). The manual formation can make bone implants during surgery. However, the method requires a longer operation time and raises the possibility of a higher error. Therefore, 3D printing technology is used to improve the quality of bone implants. One of the machines that can be used is the 3D printing machine, the property of the Product Design and Development Laboratory of Universitas Gadjah Mada. This machine needs to be tested to determine the accuracy of the prints, which is one indicator of product quality. Several machine parameters can be set in this machine setting. This study aims to determine the effect of three parameters, those are perimeter speed or edge print speed (20-40 mm / s), infill speed or inner print speed (50 - 70 mm / s), and fill angle or inner slope of inner printing (45 - 90 ° C). Before printing complex shapes, the machine was tested in advance with a more straightforward specimen design, which is a specimen design of flexural strength test. Response surface experiment design is used to determine the effect of three parameters on the dimensional accuracy which is measured through dimensional error. The results show that these three factors have no significant impact on the dimensional error, but the resulting error is still high. Therefore, it is necessary to adjust the design size before printing.

Perancangan Sarana Mobilitas Hijau Berbasis Teknologi Tepat Guna Sebagai Ikon Ecotourism Di Desa Suroteleng, Selo, Boyolali Syawaluddin Adha Pohan; Arif Kusumawanto; Alva Edy Tontowi
Destinesia : Jurnal Hospitaliti dan Pariwisata Vol 1, No 2: Maret 2020
Publisher : Institut Ilmu Sosial dan Manajemen STIAMI

Suroteleng Village (Selo Subdistrict, Boyolali Regency, Central Java) is located between the slopes of Mount Merapi to the north and the slopes of Mount Merbabu to the south. This makes Suroteleng Village potentially as a strategic ecotourism destination. Nevertheless, the local government wants to have a distinctive tourism identity, and downhill biking (cycling from the top of the mountain slope to the lower point) is proposed to be an iconic nature tourism activity in the village. Therefore it is necessary to design mobility facilities, which can facilitate tourists to easily be able to get to the starting point of cycling, which is located on the upper slopes of the mountain. The mobility facility was designed based on two aspects, namely: 1) System design theory (system engineering), and 2) Global Sustainable Tourism Council Destination Criteria; so that it meets the requirements as a green mobility based on appropriate technologies and become icon in the ecotourism area of Suroteleng Village.

Analisa Akurasi Geometri Penggunaan Metode Injection Moulding Berbasis Printer 3D Untuk Produksi Implan Pada Bedah Cranioplasty Djoko Kuswanto; Alva Edy Tontowi; Taufik Hidayat; Agus Windharto; Arie Kurniawan
Jurnal Desain Idea: Jurnal Desain Produk Industri Institut Teknologi Sepuluh Nopember Surabaya Vol 16, No 1 (2017)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember

Perkembangan teknologi printer 3D untuk medis, memungkinkan aplikasi produksi implan pra-operasi dengan keunggulan akurasi geometri yang baik, mengurangi waktu operasi dan resiko kehilangan banyak darah. Teknologi printer 3D paling populer dan potensial untuk dikembangkan masal di Indonenesia adalah fused deposition modeling/FDM. Akan tetapi memiliki kekurangan: single material, jenis material terbatas dan temperatur yang tinggi sehingga tidak bisa dicampur dengan material/senyawa bioaktif yang sensitif terhadap panas. Pengembangan metode injection moulding berbasis printer 3D telah dilakukan pada penelitian ini dengan melakukan modifikasi alat, material, tahapan dan sistim produksi implan pra-operasi yang mengacu pada teknologi printer 3D untuk cranioplasty yang sudah dilakukan di negara maju. Untuk memastikan modifikasi ini bisa menghasilkan implan pra-operasi dengan akurasi geometri yang diinginkan, dilakukan karakterisasi terhadap deviasi dimensi implan yang diproduksi yaitu deviasi volume, deviasi tebal, deviasi panjang linear dan deviasi sudut kelengkungan permukaan implan, pada dua metode berbeda yang diuji, yaitu metode cranial/intra operatif dan metode injection moulding dengan menggunakan material polymethylmethacrylate/ PMMA.Hasil yang didapatkan adalah deviasi volume implan yaitu sebesar 1.87 ± 1.27 % (injection moulding) dibandingkan 11.39 ± 3.71 % (metode cranial), deviasi tebal sebesar 2.54 ± 0.86 % (injection moulding) dibandingkan 7.35 ± 1.43 % (metode cranial), deviasi panjang linear sebesar 2.61 ± 0.47% (injection moulding) dibandingkan 5.76 ± 0.79 % (metode cranial) dan deviasi sudut kelengkungan permukaan sebesar 0.98 ± 0 % (injection moulding) dibandingkan 15.45 ± 3.94 % (metode cranial). Dapat diambil kesimpulan bahwa metode injection moulding lebih baik daripada metode cranial/intra operatif.Perkembangan teknologi printer 3D untuk medis, memungkinkan aplikasi produksi implan pra-operasi dengan keunggulan akurasi geometri yang baik, mengurangi waktu operasi dan resiko kehilangan banyak darah. Teknologi printer 3D paling populer dan potensial untuk dikembangkan masal di Indonenesia adalah fused deposition modeling/FDM. Akan tetapi memiliki kekurangan: single material, jenis material terbatas dan temperatur yang tinggi sehingga tidak bisa dicampur dengan material/senyawa bioaktif yang sensitif terhadap panas. Pengembangan metode injection moulding berbasis printer 3D telah dilakukan pada penelitian ini dengan melakukan modifikasi alat, material, tahapan dan sistim produksi implan pra-operasi yang mengacu pada teknologi printer 3D untuk cranioplasty yang sudah dilakukan di negara maju. Untuk memastikan modifikasi ini bisa menghasilkan implan pra-operasi dengan akurasi geometri yang diinginkan, dilakukan karakterisasi terhadap deviasi dimensi implan yang diproduksi yaitu deviasi volume, deviasi tebal, deviasi panjang linear dan deviasi sudut kelengkungan permukaan implan, pada dua metode berbeda yang diuji, yaitu metode cranial/intra operatif dan metode injection moulding dengan menggunakan material polymethylmethacrylate/ PMMA.Hasil yang didapatkan adalah deviasi volume implan yaitu sebesar 1.87 ± 1.27 % (injection moulding) dibandingkan 11.39 ± 3.71 % (metode cranial), deviasi tebal sebesar 2.54 ± 0.86 % (injection moulding) dibandingkan 7.35 ± 1.43 % (metode cranial), deviasi panjang linear sebesar 2.61 ± 0.47% (injection moulding) dibandingkan 5.76 ± 0.79 % (metode cranial) dan deviasi sudut kelengkungan permukaan sebesar 0.98 ± 0 % (injection moulding) dibandingkan 15.45 ± 3.94 % (metode cranial). Dapat diambil kesimpulan bahwa metode injection moulding lebih baik daripada metode cranial/intra operatif.

Kesiapan Teknologi, Kelayakan Ekonomi dan Administrasi IKM Mainan di Yogyakarta Joni Setiawan; Alva Edy Tontowi; Anna Maria Sri Asih
Dinamika Kerajinan dan Batik: Majalah Ilmiah Vol 32, No 2 (2015): Dinamika Kerajinan dan Batik
Publisher : Balai Besar Kerajinan dan Batik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22322/dkb.v32i2.1363

ABSTRAKMainan anak mempunyai pangsa pasar yang besar, dengan populasi anak usia sampai 14 tahun sebesar 28,7 % dari proyeksi penduduk Indonesia tahun 2015 mencapai 73,2 juta jiwa. Dalam berbagai penelitian menunjukkan baik mainan lokal maupun impor terdapat hal-hal yang mengancam kesehatan dan keselamatan anak. Sehingga pemerintah menerbitkan Permenperin No 24 Tahun 2013 tentang pemberlakuan wajib SNI Mainan. Penelitian ini bertujuan untuk menilai profil IKM mainan di Yogyakarta. Penilaian melalui 3 pendekatan yaitu kesiapan teknologi dianalisis menggunakan metode teknometrik, kelayakan ekonomi diperhitungkan dengan analisis benefit to cost ratio dan kesiapan adminsitrasi. Hasil yang didapatkan menunjukkan bahwa jumlah IKM di Yogyakarta yang memenuhi persyaratan ijin industri sebesar 44,4%, persyaratan merek sebesar 22,2% dan kombinasi keduanya sebesar 16,7% dari total IKM. Untuk kesiapan teknologi 16,7% IKM mempunyai TCC kurang dari 0,3 (teknologi tradisional), 77,8% IKM mempunyai TCC antara 0,3 hingga 0,7 (teknologi semi modern) dan 5,5% IKM mempunyai TCC lebih dari 0,7 (teknologi modern). Kelayakan ekonomi persentase IKM yang memenuhi kelayakan ekonomi sebesar 61%. Sehingga dapat disimpulkan bahwa IKM di DIY siap secara teknologi dan ekonomi, namun belum siap secara administrasi. Kata Kunci: SNI, mainan, IKM, sertifikasi, teknometrik ABSTRACTThe toys have a large market share, with a population of children aged up to 14 years 28.7% of the projected population of Indonesia in 2015 reached 73.2 million people. On various studies indicate both local and imported toys are threatening the health and safety of children. So the government published Permenperin No. 24/2013 concerning the implementation of mandatory Indonesian National Standard (SNI) for Toys. This study aims to assess the readiness of SMIs toys in Yogyakarta. Readiness assessment through three approaches are, readiness of technology using technometric, the calculated economic feasibility analysis of benefit to cost ratio and administration assessed. The results obtained showed that the number of SMIs in Yogyakarta which meet the requirements of industry license by 50 %, brand requirements by 22,2% and the combination of 16.7% of the total SMI. For technology readiness 16.7% of SMIs have TCC less than 0.3 (traditional technologies), 77.8% of SMIs have a TCC between 0.3 to 0.7 (semi modern technology) and 5.5% of SMIs have TCC is more than 0.7 (modern technology). Economic feasibility percentage of SMIs that meet the economic feasibility of 61%. It can be concluded that SMIs in DIY are technologically and economically ready, but not administratively. Keywords: SNI, toys, SMIs, technometric, sertification

Co-Authors Almy, Raeshifa Diani Amanda Nur Cahyawati Ambar Pertiwiningrum Andy Nurul Yunita Pettalolo Angger Bagus Prasetiyo Anggita Gigih Wahyu Iriawan, Anggita Gigih Wahyu Anna Maria Sri Asih Aoyama, Hideki Arie Kurniawan Arif Kusumawanto Arif Kusumawanto Avin Fadilla Helmi Bimantio, Mohammad Prasanto Budi Hartono Budi Hartono Budi Rochardjo, Heru Santosa Catur Sugiyanto Dawal, Siti Zawiah Md Dawi Karomati Baroroh Deendarlianto Dhananjaya Yama Hudha Kumarajati Dian Pribadi Perkasa Djoko Kuswanto Erizal Erizal Erni Suparti, Erni Ghazali, Ihwan Hari Agung Yuniarto Herianto Heru Santoso Budi Rochardjo, Heru Santoso Budi Hideki Aoyama Ihwan Ghazali Indarto Indarto Indrajati, Heppy Riani Jamasri . Joko Sedyono, Joko Joni Setiawan Joni Setiawan Kusmono Lina Dianati Fathimahhayati, Lina Dianati Mahardhika, Syaqila Erie Marlyana, Novi Marsetyawan Heparis Nur Ekanda Soesatyo Marsetyawan HNE Soesatyo Mochammad Noer Ilman Mochammad Taha Ma’ruf Muhammad Kusumawan Herliansyah Muhammad Ridlwan Musyarofah, Siti Afiani Nugraha Muharafandy Perttalolo, Andy Nurul Yunita Prabowo, Teguh Ari Putra, Gaustama Putra, Ikbal Rizki Raeshifa Diani Almy Rahardyan Magetsari Rahmanto, Nurdin Rashid, Salwa Hanim Abdul Rosid, Ibnu Abdul Rudy Firman Prakosa Salwa Hanim Abdul Rashid Sella Antesty Siti Sunarintyas Siti Zawiah Md Dawal Slamet Widyanto, Slamet Soedarmanto Indarjulianto Soetiarso, Lilik Susilo Adi Widyanto Syawaluddin Adha Pohan Taufik Hidayat Titis Wijayanto Tri Purwanti Widiastuti, Maria Goreti Widowati Siswomihardjo Widyanto, Slamet A. Widyastuti Widyastuti Windharto, Agus Wiratni Wiratni, Wiratni Wuri, Margaretha Arnita Yanti Pasmawati Yeni Yustisia

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