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All Journal 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 Applied Science and Technology Research Journal RADIAL: Jurnal Peradaban Sains, Rekayasa dan Teknologi

Alva Edy Tontowi

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

Author-ID : 404849

Aerospace Engineering Agriculture, Biological Sciences & Forestry 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 Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation Veterinary

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Characterization of Semi-Interpenetrated Network Alginate/Gelatin Wound Dressing Crosslinked at Sol Phase Dian Pribadi Perkasa; Erizal Erizal; Tri Purwanti; Alva Edy Tontowi
Indonesian Journal of Chemistry Vol 18, No 2 (2018)
Publisher : Universitas Gadjah Mada

Gel contraction of alginate during ionic crosslinking at sol phase was reduced by blending with gelatin solution due to intermolecular interaction and chain entanglement. The semi-interpenetrated network (semi-IPN) of wound dressing hydrogels were prepared by overlaid alginate/gelatin blend with 1.0% (w/w) CaCl2 solution under ambient temperature for 2 h. Results showed that gel contraction was significantly reduced with increasing gelatin content i.e. from 40.5 ± 5.8% for pure alginate to as low as 5.8 ± 1.2% for alginate/gelatin of 1:7 (w/w). It seems that gelatin successfully inhibited alginate chains mobility during their network re-arrangement by Ca2+ cation. The FTIR spectra of hydrogels showed combination of characteristic vibration of alginate and gelatin. Increasing gelatin content also significantly improved elasticity and tensile strength at break of dried hydrogels. Swelling kinetics of dried hydrogels were fitted Schott’s second-order power-law model. Increasing gelatin fraction increased the swelling rate while decreased the swelling at equilibrium. Their absorptive capacity were of interval for management of moderate to heavily exudating wound.

Pengembangan material Reusable Concrete untuk 3DP Building Andy Nurul Yunita Pettalolo; Ibnu Abdul Rosid; Alva Edy Tontowi
SENATIK STT Adisutjipto Vol 6 (2020): Keselamatan Penerbangan di masa Pandemi Covid-19 [ISBN 978-602-52742-2-0]
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/senatik.v6i0.414

Abstrak. Kerusakan bangunan pasca gempa bumi menghasilkan limbah berupa reruntuhan bangunan (reusable material) yang tidak dimanfaatkan secara maksimal, sehingga memerlukan adanya pemanfaatan limbah reruntuhan bangunan tersebut sebagai material untuk membangun bangunan baru. Pada Penelitian ini dilakukan pengembangan material bangunan untuk mesin 3D Printer dengan memanfaatkan material sisa reruntuhan (reusable concrete material). Pembuatan kombinasi material menggunakan design of experiment berupa 2k factorial design dengan menggunakan 2 faktor berupa variasi penambahan air dan superplaticizer, dengan 2 level berupa penambahan air sebesar 15 ml dan 25 ml dan superplaticizer 1 ml dan 2 ml dengan respon berupa kemampuan bentuk material. Hasil penelitian didapatkan bahwa run time 1 dan 2 mampu membentuk second layers tetapi run time 1 adanya ketidak-kontinuan material sedangkan run time 3 dan 4 tidak mampu membentuk second layers sehingga run time 2 yang memiliki kontinu dan kemampuan bentuk second layers.

PENGEMBANGAN MESIN 3D PRINTING BANGUNAN UNTUK MATERIAL SISA RERUNTUHAN BANGUNAN Andy Nurul Yunita Perttalolo; Ibnu Abdul Rosid; Alva Edy Tontowi
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 10 No. 1 (2022): RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi
Publisher : Universitas Bina Taruna Gorontalo

Abstrak: Pengembangan Mesin 3D Printing Bangunan Untuk Material Sisa Reruntuhan Bangunan. Material reruntuhan bangunan dapat dimanfaatkan sebagai bahan bangunan yang digunakan untuk proses rekonstruksi. Teknologi yang dapat digunakan untuk melakukan rekonstruksi bangunan adalah teknologi 3D Printer FDM. Pada penelitian ini dikembangkan material untuk teknologi 3D Printer FDM dengan memanfaatkan recycle material yang tersusun berupa semen, fly ash, clay, superplaticizer dan air yang disebut recycle concrete, serta dilakukan optimasi parameter mesin 3D Printer untuk mendapatkan kombinasi parameter dengan error dimensi yang minimal. Penelitian ini dikembangkan mesin 3D Printer untuk konstruksi bangunan. Metode optimasi parameter menggunakan Fractional Factorial Design dengan 3 parameter dalam 2 level yaitu berupa print speed (100 mm/s dan 120 mm/s), layer height (6 mm dan 9 mm) serta kecepatan putaran ekstruder (30 rpm dan 40 rpm). Hasil optimasi didapatkan layer height berpengaruh signifikan terhadap error dimensi tinggi dan interaksi print speed dan kecepatan putaran ekstruder berpengaruh signifikan terhadap error dimensi tinggi, untuk mendapatkan error dimensi terkecil didapatkan dengan kombinasi parameter print speed sebesar 100 mm/s, layer height sebesar 6 mm, dan kecepatan putaran ekstruder sebesar 30 rpm dengan hasil error dimensi diameter sebesar 0,0671 dan error dimensi tinggi sebesar 0,0256. Abstract: Building 3D Printing Machine Development for Building Ruins Residual Material. Building ruins materials can be used as building materials used for the reconstruction process. The technology that can be used to reconstruct buildings is FDM 3D Printer technology. In this study, materials for 3D Printer FDM technology were developed by utilizing recycle materials composed of cement, fly ash, clay, superplaticizer and water, it called recycle concrete. Optimization of 3D Printer machine parameters was carried out to obtain a combination of parameters with minimal error dimension. This research developed 3D Printer Machine for building construction. The parameter optimization method used Fractional Factorial Design with 3 parameters and 2 levels, it were explained by print speed (100 mm/s and 120 mm/s), layer height (6 mm and 9 mm) and extruder rotation speed (30 rpm and 40 rpm). The optimization results obtained layer height has a significant effect on high dimensional errors and the interaction of print speed and rotational speed of the extruder has a significant effect on high dimensional errors, to get the smallest dimensional error obtained with a combination of print speed parameters of 100 mm/s, layer height of 6 mm, and The extruder rotation speed is 30 rpm with a diameter dimension error of 0.0671 and a height dimension error of 0.0256.

Analisi Kontribusi Komponen Teknologi UMKM Kota Bontang Menggunakan Metode Teknometrik Sella Antesty; Alva Edy Tontowi
Jurnal Riset Teknologi Industri Vol.14 No.2 Desember 2020
Publisher : Balai Riset dan Standardisasi Industri Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26578/jrti.v14i2.6211

ABSTRAKKeberadaan usaha mikro kecil menengah di suatu daerah seperti kota Bontang penting bagi daerahtersebut karena dapat meningkatkan kesejahteraan penduduknya lebih cepat dibanding dengan sektor lainnya. Industri tersebut perlu dibina sehingga tumbuh sehat agar produknya diminati pasar. Namun demikian, pembinaan tersebut tidak dapat efektif karena tidak ada peta teknometrik yang dapat digunakan sebagai acuan. Dalam studi ini, peta teknometrik industri dibuat dengan tujuan untuk mendapatkan peta kemampuan tingkat kontribusi teknologi yang dimiliki industri dan hasilnyadidiskusikan. Usaha mikro kecil menengah berbasis pengolahan makanan yang tersebar di wilayah kota Bontang dijadikan sebagai obyek pemetaan dan metode teknometrik digunakan untuk menghitung tingkat kontribusi teknologi yang dimiliki. Hasil studi ini menunjukkan bahwa dari 4 aspek yang diteliti yang meliputi Technoware (fasilitas teknologi), Humanware (sumberdaya manusia), Infoware (kerangka kerja) dan Orgaware (manajemen) didapatkan hasil bahwa usaha mikro kecil menengah di kota Bontang masih menitik beratkan pada aspek humanware atau sumber daya manusia dengan kemampuan fasilitas teknologi produksi yang rendah.

Development of Low Frequency Vibration Method of Direct-Write Deposition Relevant to Layer Manufacturing Application Widyanto, Susilo Adi; Tontowi, Alva Edy; Jamasri, Jamasri; Budi Rochardjo, Heru Santosa
Makara Journal of Technology Vol. 9, No. 2
Publisher : UI Scholars Hub

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The research of deposition process is the first step in development process of multi materials selective laser sintering. The deposition process enables to settle multi materials powder in horizontal formation on one layer. In this research we use low frequency (70 - 200Hz) to vibrate a hopper nozzle in which powder is settled. The research method consists of two steps, the first step is to determine flow-ability parameters and the second is to join flow ability parameter with other parameters such that the line width can be controlled. The results show that the line width depends on uniformity of particle size, particle size, frequency of vibration, deposition gap, particle shape and feed-rate of hopper-nozzle.

Determination of Operation Condition and Product Dimension Accuracy Optimization of Filament Deposition Modelling on Layer Manufacturing Application Widyanto, Slamet A.; Tontowi, Alva Edy; Jamasri, Jamasri; Rochardjo, Heru Santoso Budi
Makara Journal of Technology Vol. 10, No. 2
Publisher : UI Scholars Hub

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Layer manufacturing process has proven as a process that can produce a high complexity mechanical part. Now, Improvement of LM methods continuously conduct that is aimed to increase precessions and efficiency of these processes. Pressure filament deposition modelling is a form of layer manufacturing process that is designed to produce a plastic part with controlling its semisolid phase. In this research, the equipment of filament depositor is designed and tested to make the product filament deposition. With operation condition observation, the optimal temperature and pressure of deposition process was determined. These experiments used PVC as crystalline material and polypropylene as amorphous material. To optimize this process, the tensile strength and density test were conducted. The shape of tensile test specimens is based on ASTM 638 standard and made in 3 orientations deposition path, namely: in 0 degree, 45 degree and 90 degree from load force axis. To found the most accurate dimension, controlling the time delay, temperature of build part, feeding speed and variation deposition path was conducted. The results of experiments show that the filament deposition method can only be applied for amorphous material in which it has a semisolid phase. From the tensile strength test, the binding strength among filaments is 0.5 kg/mm2, 20% of the tensile strength of filament. And the density of a sample product, which used the filament diameter of 0.8 mm, is 0.7668 g/cm3. Accuracy of product dimension can be increased by: controlling time delay in location where the motion orientation of hopper filament is changed and controlling temperature of build part surface.

Analisis Ukuran Pori Biokomposit (Sericin-Bioplastik) pada Berbagai Suhu Pembekuan Awal dengan Metode Taguchi Gaustama Putra; Alva Edy Tontowi
JURNAL TEKNIK INDUSTRI Vol. 9 No. 3 (2019): Volume 9 No 3 November 2019
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Indusri Universitas Trisakti

Intisari— Kebutuhan Biomaterial bidang medis dalam berbagai keperluan terus meningkat. Produk biomaterial di Indonesia kebanyakan adalah produk impor, harganya mahal dan membutuhkan waktu lama saat dibutuhkan. Berdasarkan hal ini, penelitian di bidang biokomposit makin meningkat. Sericin adalah protein yang biokompatibel, biodegradable dan sifat penting lainnya. Sericin banyak digunakan dalam aplikasi biomedis dan merupakan bahan alami yang menjanjikan sebagai bahan medis alternatif. Tujuan penelitian adalah menganalisis diameter pori yang terbentuk dan campuran optimal biokomposit sericin-bioplastik dengan menggunakan metode Taguchi. SEM dan FTIR untuk melihat diameter pori dan struktur biokomposit. Bahan yang digunakan pati tapioka 16g, 14g dan 10g, aquades 80 ml dan gliserin 6 ml, sericin 0,03, 0,1, dan 0,3%. Biokomposit mengalami proses freeze drying dan pembekuan pada -25°C, -45°C dan -80°C. Hasil penelitian untuk respon rata-rata dan SNR, maksimum pada 16g tepung tapioka, 0,03% sericin dan pembekuan -25°C. SEM menunjukkan pembekuan -25°C biokomposit C: 41,94 μm, F: 33,416 μm, dan I: 2,743 μm memenuhi syarat regenerasi jaringan kulit. Nilai prediksi dan interval kepercayaan rata-rata besar 11,656 μm dan kecil 54,602 μm, SNR besar 31,940 μm dan kecil 33,642 μm. Nilai konfirmasi secara eksperimental kondisi optimal diameter pori besar untuk rata-rata lebih besar dari 32.342 μm dan lebih kecil dari 34.206 μm, SNR lebih besar dari 32.342 μm dan kecil 34.206 μm. pembekuan I biokomposit -80 C muncul gugus fungsi C=O yang tidak ada dalam sampel lain. Abstract— The need for Biomaterials in the medical field for various purposes continues to increase. Most of biomaterial products available in Indonesia are imported products. They are expensive and take a long time to provide. Due to these reasons, research in the field of biocomposites is increasing. Sericin is a protein that is biocompatible, biodegradable and has other important properties. Sericin is widely used in biomedical applications and is a promising natural material as an alternative medical material. The aim of the study was to analyze the pore diameter formed and the optimal mixture of sericin-bioplastics biocomposite using the Taguchi method. SEM and FTIR were also employed to see the pore diameter and biocomposite structure. The materials used were 16g, 14g and 10g of tapioca starch, 80 ml of aquades and 6 ml of glycerin, as well as 0.03, 0.1 and 0.3% sericin. Biocomposite underwent a freeze drying and freezing process at -25°C, -45°C and -80°C. The results showed that the maximum mean and SNR responses were at 16g tapioca starch, 0.03% sericin and freezing temperature of -25°C. SEM showed that freezing at -25°C for biocomposite C: 41.94 μm, biocomposite F: 33.416 μm, and biocomposite I: 2.743 μm fulfilled the requirements for skin tissue regeneration. Predicted mean values and confidence intervals for large and small pore sizes were 11.656 μm and 54.602 μm, SNR values for large and small pore sizes were 31.940 μm and 33.642 μm. The mean experimental confirmation values of optimal conditions for pores with large diameters were greater than 32.342 μm and smaller than 34.206 μm, SNRs were greater than 32.342 μm and smaller than 34.206 μm. The freezing of biocomposite I at -80 C yielded C=O functional group which was not present in other samples.

KANSEI ENGINEERING AND EYE TRACKING IN TEA PACKAGING DESIGN FOR ENHANCING CONSUMER APPEAL Cahyawati, Amanda Nur; Fathimahhayati, Lina Dianati; Tontowi, Alva Edy
JEMIS (Journal of Engineering & Management in Industrial System) Vol 12, No 1 (2024)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

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This research aims to determine the design specifications for tea drink packaging that appeal to consumers using Kansei and eye-tracking techniques. Kansei Engineering focuses on developing products that align with consumers' feelings and emotional needs. Eye-tracking provides insights into how consumers see and interact with packaging, as evidenced by total fixation duration, allowing for the identification of design elements that attract the most attention and influence consumer perception. The application of eye-tracking and Kansei Engineering helps match customer perceptions of products with their functional and technical specifications, providing a holistic and effective approach to increasing sales and consumer satisfaction. Integrating these two methods makes the design process more consumer-focused, combining emotional and visual appeal, thereby increasing attractiveness and potential consumption. The urgency of this research lies in its potential to revitalize the tea industry in Indonesia by utilizing innovative packaging designs. Enhancing consumer appeal to tea products through the integration of Kansei Engineering and eye-tracking, which are visually and emotionally engaging, addresses the main obstacle to low tea consumption in Indonesia. Thus, it contributes to the growth of the tea market and promotes healthier beverage choices among Indonesian consumers. The research results show that an aesthetic packaging design requires a sports cap type lid, a convex bottle body, a plain motif, and a square cross-section. Ergonomic packaging design requires a flip cap type lid, a wave-shaped bottle body, a textured motif, and a round cross-section. Simple packaging design requires a straw cap type lid, a serrated bottle body, a plain motif, and a square cross-section. This research aims to revitalize Indonesia's tea industry through consumer-oriented packaging design, increasing emotional and visual appeal. Key implications include increased consumer appeal, potential for increased consumption, better marketing strategies, and packaging design innovation that resonates emotionally with consumers.

Mechanical Properties Of Tensile And Bending Strength Analysis In Biocomposite [SAGOO/PMMA] Material Rosid, Ibnu Abdul; Putra, Ikbal Rizki; Tontowi, Alva Edy
SENATIK STT Adisutjipto Vol 5 (2019): Peran Teknologi untuk Revitalisasi Bandara dan Transportasi Udara [ISBN 978-602-52742-
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/senatik.v5i0.371

Biocomposite material is a common material used in biomedical application. One of medical problems related to bone restoration which caused by accidents and injuries resulted in fracture bone parts. Biocomposite (Sagoo/PMMA) is being developed as a solution to solve that particular problem. In current research, tensile and flexural strength of sagoo/PMMA is tested and examined. There are correlation between value of tensile strength, value of bending strength, and curing time, with maximum tensile strength and bending strength were achieved by curing the specimen for 12 hours, with the maximum value of tensile strength is 3,337 MPa, and the maximum flexural is 2,653 MPa. The minimum tensile strength was achieved by curing the specimen for 6 hours with minimum value of tensile strength is 1,502 MPa, while the minimum flexural was acquired at curing time for 24 hours with minimum of bending strength is 0,536 MPa

Pemetaan Efektivitas dan Efisiensi Metode Desain Produk: Telaah Pustaka Widyastuti Widyastuti; Erni Suparti; Alva Edy Tontowi
Tekinfo: Jurnal Ilmiah Teknik Industri dan Informasi Vol 12 No 2 (2024)
Publisher : Program Studi Teknik Industri Universitas Setia Budi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31001/tekinfo.v12i2.2277

Identification of user needs and their conversion into product specifications is an important stage in the product design process. The large number of design methods currently available is a challenge for designers in choosing an effective and efficient design method. The aim of this literature review was to identify the use of product design methods between 2019-2023, mapped the effectiveness and efficiency of existing product design methods. Identification process used bibliometric analysis of articles in the SCOPUS database. VOSviewer software was used in the analysis process with co-occurence type and full-counting calculation methods. Effectiveness mapping was based on 7 criteria (E1 - E7) and efficiency based on 3 criteria (F1 - F3). The identification results show that the design methods that have been widely used in the last five years were value engineering, quality function deployment, user centered design, universal design, kansei engineering and TRIZ. The mapping results show that effective and efficient methods were QFD and value engineering. The effectiveness and efficiency of other methods were explained in more detail in this review.

Co-Authors Almy, Raeshifa Diani Amanda Nur Cahyawati Ambar Pertiwiningrum Andy Nurul Yunita Perttalolo 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 Jamasri . Joko Sedyono, Joko Joni Setiawan Kusmono Lina Dianati Fathimahhayati, Lina Dianati 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 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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