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All Journal Jurnal Keteknikan Pertanian Jurnal Teknologi Rekayasa Mesin Sinergi Journal of ICT Research and Applications Indonesian Journal of Science and Technology JOURNAL OF SCIENCE AND APPLIED ENGINEERING Jurnal Pelayanan dan Pengabdian Masyarakat (Pamas) Jurnal Pengabdian Masyarakat Teknik Journal of Applied Sciences and Advanced Technology Indonesian Journal of Computing, Engineering, and Design International Journal of Computer and Information System (IJCIS) Mechanical Engineering for Society and Industry Makara Journal of Science Journal of Community Services: Sustainability and Empowerment ASEAN Journal for Science and Engineering in Materials
Kushendarsyah Saptaji
Universitas Sampoerna
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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Deburring Method of Aluminum Mould Produced by Milling Process for Microfluidic Device Fabrication Kushendarsyah Saptaji; Farid Triawan; Tong Keong Sai; Asmelash Gebremariam
Indonesian Journal of Science and Technology Vol 6, No 1 (2021): IJOST: VOLUME 6, ISSUE 1, April 2021
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v6i1.31852

Abstract

The existence of top burrs in micro-scale features produced by milling process can deteriorate the surface quality of a product. Ductile metals, such as aluminum alloys, are prone to suffer from top burrs formation after a slot-milling process. A brief review on the state-of-the-art of burr removal process in micro-scale milling is provided in this paper. Various deburring methods were reportedly able to remove the burrs in micro-scale features, however a much simpler method is still needed. In the present work, a deburring process by stainless steel end brushing is introduced for aluminum mould used in microfluidic device fabrication. The micro-scale features are produced by slot-milling process followed by the deburring process. The deburred moulds are then visually observed using optical microscope and Scanning Electron Microscope (SEM) and the average surface roughness and its features profile are measured using 3D Laser Scanning Confocal Microscope. As a result, the proposed deburring method can successfully remove the top burrs, as indicated by a height reduction of about 21% due to the removal action by the brush. Hence, a burr-free embossing mould with complex shape channel features can be produced by milling and by applying a simple deburring process using stainless steel end brush.
STUDI PENGEMBANGAN NANOFLUIDA HIJAU BERASAL DARI BAHAN LOKAL ALAM UNTUK APLIKASI DI BIDANG TEKNIK Kushendarsyah Saptaji; Alvika Meta Sari; Anwar Ilmar Ramadhan; Istianto Budhi Rahardja; Muhammad Dadi Saputra; Firmansyah Firmansyah; Efrizon Umar
Jurnal Teknologi Vol 15, No 2 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.2.345-358

Abstract

The increase in energy demand causes a continuous increase in global temperatures exceeding pre-industrial temperatures with the release of toxic gases and radiation causing severe climate conditions. So, it is mandatory to develop durable and highly efficient thermal systems to overcome these problems. There has been much research into nanofluids to improve performance in thermal applications and have gained significant attention over the past few years due to their superior qualities. Additionally, other undesirable effects such as corrosion of equipment, non-biodegradable by-products occur due to the presence of strong chemicals. Therefore, the development of cost-effective and environmentally friendly nanofluids has emerged as a fast-growing alternative research field with many enthusiasts. The current review provides a comprehensive view of the various techniques used in the preparation of green nanofluids using several natural extracts. The unique morphology, optical properties, stability, high surface area, lower toxicity, and improved thermo-physical properties of green nanoparticles make them favorable choice candidates in enhancing the performance of thermal systems.
Utilization of plastic waste to improve properties of road material: A review Safety Husna Pangestika; Kushendarsyah Saptaji; Anak Agung Ngurah Perwira Redi; Asep Bayu Dani Nandiyanto; Surya Danusaputro Liman; Farid Triawan
Mechanical Engineering for Society and Industry Vol 3 No 3 (2023): Special Issue on Technology Update 2023
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.10133

Abstract

The failure of asphalt pavement occurs due to heavy traffic loads and weather conditions such as humidity, temperature, and UV radiation. To address or minimize these failures, significant efforts have been made in recent years to improve the properties of asphalt materials, ultimately enhancing field performance, and extending the lifespan of pavements. Asphalt with plastic modification is considered one of the most suitable and popular approaches. Plastic offers several advantages and is generally known to improve stiffness at high temperatures, although some types are more susceptible to phase separation. Therefore, it is necessary to use the right methods, temperatures, and proportions when designing plastic asphalt mixes to produce a homogeneous mixture. Plastic mixing with asphalt blends is done through two methods: the dry mixing method and the wet mixing method. The ideal amount of plastic added to the mix should modify the asphalt blend to make it more resistant to rutting, fatigue cracking, thermal cracking, and moisture resistance. Failure to determine the correct plastic dosage can lead to negative effects on pavement performance. In general, incorporating plastic waste into asphalt mixes has shown improvements in performance metrics such as stiffness, resistance to cracking, and fatigue resistance. The result of the asphalt and plastic mixture is an increase in stability, making the mixture stronger in bearing loads. Adding plastic waste to the mix makes it stiffer, resulting in a higher MR value, thus providing better resistance to permanent deformation compared to conventional mixtures. Additionally, in wheel tracking tests, the asphalt-plastic mixture reduced rutting depth by 29% compared to conventional mixtures. Similarly, in fatigue testing, the asphalt-plastic mixture yielded a higher load cycle value, making it more resistant to repeated loads. This article explains the details of using plastic in asphalt mixes to enhance asphalt performance and road durability. Various types of plastics, including PET, HDPE, LDPE, PVC, LDPE, PP, and PS, have been successfully used to modify asphalt. However, each type has its advantages and disadvantages, as discussed comprehensively in this journal. Essentially, the utilization of plastic waste in asphalt blends will help reduce the need for landfill disposal, decrease dependence on non-renewable resources, and expand options for asphalt pavement construction.
Review of the Potential use of Poly (lactic-co-glycolic acid) as Scaffolds in Bone Tissue Recovery Saptaji, Kushendarsyah; Asriyanti, Asriyanti; Khoiriyah, Nisa; Muryanti, Laely; Setiawan, Iwan
Makara Journal of Science Vol. 28, No. 1
Publisher : UI Scholars Hub

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

Abstract

Scaffolds are used as temporary tissue in the human body to expedite healing. Biocompatible materials play a vital role in the field of tissue engineering. Therefore, they can be used to reduce human pain as soon as possible. Polymeric materials are widely used to replicate bone tissue. Poly(lactic-co-glycolic acid) (PLGA) is a potential material for bone tissue scaffolds because of its superior properties, including compatibility with the human body. Accordingly, adding hydroxyapatite and introducing different fabrication methods can enable the production of PLGA scaffolds with good abilities to help cells grow, expand, differentiate, and proliferate. The paper reviews the current development of the biocompatible material PLGA as bone tissue scaffolds. It focuses on the applications, properties, improvements, and sustainability of PLGA.
Development of 3D Printed Autonomous Warehouse Robot Using Mecanum Wheel and Robot Arm Hadisujoto, Budi; Rabbani, Ariq Naufal; Saptaji, Kushendarsyah; Fernandez, Nikolas Krisma; Wibowo, Djati
Journal of Applied Sciences and Advanced Technology Vol 6, No 2 (2023): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.6.2.57-64

Abstract

Industrial revolution 4.0 has affected many industries, including warehouse management. Warehouse management so far has progressed with the introduction of automation, i.e. using warehouse robots to improve the flow of the warehouse management. This work discusses and builds a 3D-printed warehouse robot prototype in the form of mobile manipulator with mecanum wheel. The mecanum wheel is chosen for better kinematics movement. The prototype warehouse robot is designed to accept command wirelessly through Bluetooth via an Android application. The prototype robot was successfully built and tested. The movement test shows it can move freely in any direction due to the mecanum wheel. However, the robot still has poor repeatability and reliability. Based on the result, the prototype can serve as a basis for an affordable warehouse robot, and the future work to improve the repeatability and reliability of the robot is strongly encouraged.
PENGEMBANGAN ALAT CETAKAN KUE AKAR KELAPA OTOMATIS UNTUK PELAKU USAHA MIKRO KECIL DAN MENENGAH (UMKM) Dyota, Arya Smara; Kamila, Fatima Tasya; Saptaji, Kushendarsyah; Fikri, Muhamad Rausyan; Hadisujoto, Ignatius Budi Sutanto; Setiawan, Iwan; Ramadhan, Anwar Ilmar
Jurnal Pengabdian Masyarakat Teknik Vol 5, No 2 (2023): Jurnal Pengabdian Masyarakat Teknik (JPMT)
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jpmt.5.2.59-64

Abstract

Kue akar kelapa merupakan kue kering atau camilan khas masyarakat suku Betawi, Indonesia yang berbentuk seperti akar kelapa. Sebagai salah satu makanan tradisional, tentu saja kue akar kelapa ini perlu untuk dilestarikan. Namun dalam proses pembuatannya, masih banyak dilakukan dengan cara manual yang membutuhkan waktu dan tenaga yang cukup banyak, sehingga dibutuhkan alat otomatis untuk menghemat kedua hal tersebut. Oleh karena itu, civitas akademi dari Fakultas Teknik dan Teknologi Universitas Sampoerna mengadakan kegiatan pengabdian kepada masyarakat untuk membantu para pengusaha kue akar kelapa dengan membuat alat cetakan kue akar kelapa otomatis. Kegiatan ini juga melibatkan mahasiswa dari jurusan teknik mesin Universitas Sampoerna dengan mengimplimentasikan sebagai tugas proyek pada mata kuliah proses manufaktur dengan bimbingan dosen pengajar matakuliah tersebut. Kegiatan ini dilakukan terutama untuk membantu pengusaha kecil menengah yang tergabung dalam Persatuan Usaha Kecil dan Menengah Indonesia (Perumkmindo) Jakarta Selatan. Proses kegiatan dimulai dengan melakukan riset, mendesain alat, membuat prototipe alat, hingga uji coba dan demo kepada perwakilan Perumkmindo. Dari hasil ujicoba, salah satu alat yang dibuat oleh mahasiswa dihasilkan pada kegiatan pengabdian masyarakat ini dinilai layak dari segi teknis dan ekonomi. Selain untuk melestarikan makanan tradisional, alat ini diharapkan dapat meningkatkan produktivitas penjual kue akar kelapa dan meningkatkan pendapatan. 
Investigation of Thermal Conductivity and Dynamics Viscosity of Green Nanofluids (ZrO2-SiO2) Ramadhan, Anwar Ilmar; Saptaji, Kushendarsyah; Hendrawati, Tri Yuni; Sari, Alvika Meta; Umar, Efrizon; Aziz, Azmairit; Semendo, Rifqi Putra; Setiawan, Hanif Rama Yuda; Firmansyah, Firmansyah
Jurnal Teknologi Vol 16, No 2 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.2.301-312

Abstract

In recent years, research has been directed towards improving the thermophysical properties of single-component nanofluids. Therefore, hybrid or composite nanofluids are developed to improve heat transfer performance. The thermophysical properties of ZrO2-SiO2 nanoparticles suspended in a mixture of water (W) and ethylene glycol (EG) with vol 60:40 or Green Nanofluids for various volume concentrations were investigated. Experiments were performed for volume concentrations of 0.1, 0.2, and 0.3% of green nanofluids at 50, 60, 70, and 80°C. Measurements of thermal conductivity and dynamic viscosity are performed at temperatures ranging from 50-80°C. The highest thermal conductivity of the green nanofluids is obtained at a concentration of 0.3%, and the maximum increase is up to 37.5% higher than the base fluid (EG/W). Meanwhile, evidence from the dynamic viscosity of green nanofluids is affected by concentration and temperature. Furthermore, the green nanofluids behave as a Newtonian fluid in a volume concentration of 0.1-0.3%. In conclusion, the combination of increased thermal conductivity and dynamic viscosity at a concentration of 0.3% has optimal conditions, which has more advantages for heat transfer than at other concentrations.
Improvement of ankle foot orthotics fabrication using 3D printing method Saptaji, Kushendarsyah; Manasikana, Dinda Arina; Juniasih, Octarina Adiati; Ramadhani, Mochammad Rafli; Oktaviandri, Muchamad; Ramadhan, Anwar Ilmar; Asmara, Yuli Panca
SINERGI Vol 28, No 3 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2024.3.015

Abstract

Orthotics are the body support devices used for correction, immobilization, fixation, and prevention of paralysis. The greatest number of orthotics utilized by people suffering from plantarflexion and dorsiflexion disability, especially in Indonesia, is ankle foot orthotic (AFO). However, the duration associated with fabricating AFO through conventional methods is considered time-consuming. This paper aims to fabricate ankle foot orthotics (AFO) using innovative combinations of 3D scanning and 3D printing. The method begins with 3D scanning of the patient’s lower limb using photogrammetry (3DF Zephyr). The design is generated and adjusted, afterwards, the orthotic prototype is produced by fused deposition modeling (FDM) 3D printing using polypropylene (PP) material. This choice is attributed to the material's advantages, such as being lightweight, rigid, durable, and cost-effective. The 3D mesh model scanned using 3DF Zephyr shows good quality and more precise results. In addition, the prototype produced using 3D printing was tested by walking based on normal gait analysis’s angle of foot and calf measurement, which shows a maximum range of motion (ROM) of 16.1˚. The proposed methods of fabricating orthotic prototypes can successfully reduce the processing time by approximately 70% compared to the conventional method. 
EFFECT OF ANNEALING ON THE MECHANICAL PROPERTIES OF FUSED DEPOSITION MODELING 3D PRINTED PLA Natayu, Amartya; Muhammad, Azka Aulia; Tumada, Azhari; Saptaji, Kushendarsyah; Trisnadewi, Titin; Triawan, Farid; Ramadhan, Anwar Ilmar; Azhari, Azmir
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.v15i3.1625

Abstract

Additive manufacturing or 3D printing is a rapidly moving fabrication technology with many usages in various fields. One of the methods used in 3D printing is Fused Deposition Modeling (FDM), where polylactic acid (PLA) filament is melted and deposited layer by layer to form the desired parts. This study explored the impact of annealing on the mechanical properties of 3D printed PLA specimens. Tensile specimens were produced using FDM following ASTM D638 standards. The specimens were annealed at 95°C and 145°C for 30, 60, and 120 minutes. Two untreated specimens served as benchmarks. Tensile tests were conducted on all specimens to evaluate their mechanical properties. The most optimal result was achieved with annealing at 95°C for 30 minutes, producing Young’s modulus of 3.3 GPA and the highest ultimate tensile strength (UTS) of 38.9 MPa. Other parameters resulted in lower properties compared to the untreated specimens.
Preserving Betawi Culture: Introducing Additive Manufacturing for Ondel-Ondel Souvenirs in Micro, Small, and Medium Enterprises (MSMEs/UMKM) Saptaji, Kushendarsyah; Ifat, Ifat; Putra, Indra Pertama; Kalam, Ikramin; Islam, Sri Susilawati; Triawan, Farid; Siswojo, Nathanael Ansel; Lubis, Steven Abed Daniel; Bryan, Jonathan; Handani, Nadya Geraldine
Journal of Community Services: Sustainability and Empowerment Vol. 4 No. 01 (2024): March 2024
Publisher : Center for Research and Community Service of Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/jcsse.v4i1.468

Abstract

The contributions of campus as a technology hub to the society need to be increased. One of the way is to help micro, small, and medium enterprises (MSMEs) or Usaha Mikro, Kecil, dan Menengah (UMKM) to improve their process, capability and product. In this study, a team consisted of students and lecturers from Faculty of Engineering and Technology Sampoerna University led a community service project on one of MSMEs in Jakarta area. Over eight months, the team introduced innovative manufacturing techniques like 3D printing and mold-making to one of the MSMEs called Jawara Peci. Jawara Peci sells traditional souvenir, Ondel-ondel miniature. The purpose of this activity is to help Jawara Peci to have a unique ondel-ondel miniature product with the use of technology in order to preserve the cultural heritage of Betawi. The activity includes, socialization and introduction of the program, 3D design and product development, prototyping and delivery. The activity was successfully producing a new method to produce an Ondel-ondel souvenir using 3D printing and casting. The proposed method is expected can be implemented by the Jawara Peci to improve the uniqueness of the Ondel-ondel souvenir so that can contribute to economic growth and cultural awareness. This activity highlighted the potential of merging technology and heritage in improving inclusive economic development.
Co-Authors Abdillah, Sultansyah Reza Adiati Junaisih, Octarina Aditiya Harjon Alvika Meta Sari Anak Agung Ngurah Perwira Redi Anwar Ilmar Ramadhan Arnaz Asa Sholeh Asep Bayu Dani Nandiyanto Asmelash Gebremariam Asriyanti, A. Asriyanti, Asriyanti Ayu Wardani, Dilla Azhari, Azmir Azmairit Aziz Bryan, Jonathan Budiarta, Wahyu Nur Chang, Steven Henderson Dindamilenia Choirunnisa Hardiyasanti Dyota, Arya Smara Efrizon Umar Efrizon Umar Fernandez, Nikolas Krisma Fernandez, Nikolas Krisma Hadi Fijai Naja Azmi Fikri, Muhamad Rausyan Firmansyah Firmansyah Firmansyah Firmansyah Frandito, Raffy Gloria Ellysian Aprilia Hadisujoto, Budi Hadisujoto, Ignatius Budi Hadisujoto, Ignatius Budi Sutanto Handani, Nadya Geraldine Handika, Raditya Edra Raja Ifat Ifat Ifat Ifat, Ifat Ignatius Budi Hadisujoto Ignatius Budi Sutanto Hadisujoto Ignatius Budi Sutanto Hadisujoto Indra Pertama Putra islam, sri susilawati Istianto Budhi Rahardja Iwan Setiawan Iwan Setiawan Iza, Nurlaely Rohmatul Juniasih, Octarina Adiati Kalam, Ikramin Kamila, Fatima Tasya Khoiriyah, Nisa Kusuma Dewi, Tiara Lanaggalih, Jarvis Eros Lubis, Steven Abed Daniel M.S. Hendriyawan Achmad Manasikana, Dinda Arina Muchamad Oktaviandri Muchammad Fachrizal Ali Muhamad Rausyan Fikri Muhamad Rausyan Fikri Muhammad Akhsin Muflikhun Muhammad Dadi Saputra Muhammad Lukman Baihaqi Alfakihuddin Muhammad, Azka Aulia Mulia, Vania Katherine Muryanti, Laely Natayu, Amartya Nurprihatin, Filscha Ong, Janice Priyandoko Gigih Putra, Indra Pertama Rabbani, Ariq Naufal Raden Dadan Ramdan Raffy Frandito Ramadhani, Mochammad Rafli Ramadhona Saville Rausyan Fikri, Muhamad Reflin, Rhainna Rheizkhira Safety Husna Pangestika Semendo, Rifqi Putra Setiawan, Hanif Rama Yuda Sholeh, Arnaz Asa Siswojo, Nathanael Ansel Siti Nur Afiqah Surya Danusaputro Liman Tedi Kurniawan Tiara Kusuma Dewi Tong Keong Sai Tri Yuni Hendrawati Triawan, Farid Trisnadewi, Titin Tumada, Azahri Tumada, Azhari Utomo, Muhammad Satrio Wandy Wandy Weandri, Aliffa Ratumahesa Wibowo, Djati Widianingrum, Sinta Wong, Miguel Silvano Hermawan Yheni Mulyaningsih Yuli Panca Asmara Yuli Panca Asmara