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All Journal Marine Fisheries: Jurnal Teknologi dan Manajemen Perikanan Laut TEKNIK Rotasi JURNAL TEKNIK MESIN Semantik TELKOMNIKA (Telecommunication Computing Electronics and Control) Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Prosiding SNATIF Majalah Ilmiah MOMENTUM Jurnal Rekayasa Mesin Proceeding of the Electrical Engineering Computer Science and Informatics Jurnal Keperawatan Silampari Medica Hospitalia Jurnal Pembelajaran Pemberdayaan Masyarakat (JP2M) Teknomekanik Jurnal Rekayasa Energi dan Mekanika Mechanical Engineering for Society and Industry Automotive Experiences IJEE (International Journal of Engineering Education) Journal of Biomedical Science and Bioengineering Advance Sustainable Science, Engineering and Technology (ASSET)
Rifky Ismail
Department Of Mechanical Engineering, Diponegoro University, Jl. Prof. Soedarto, Tembalang, Kec. Tembalang, Kota Semarang, Jawa Tengah 50275.
Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Dentistry Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Transportation Other

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Analisis Parameter Fisik Filamen Biokomposit PLA PCL HA Hasil Proses Ekstrusi Hidayat, Wahyu; Bayuseno, Athanasius Priharyoto; Ismail, Rifky; Fitriyana, Deni Fajar; Cionita, Tezara; Prawibowo, Hartanto
ROTASI Vol 26, No 4 (2024): VOLUME 26, NOMOR 4, OKTOBER 2024
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.26.4.27-32

Abstract

Penelitian ini berfokus pada tantangan implan logam yang memerlukan operasi kedua, serta risiko infeksi, peradangan, dan korosi yang mungkin terjadi di dalam tubuh. Untuk mengatasi masalah tersebut, penelitian ini mengembangkan material biokomposit yang terdiri dari PCL (Polycaprolactone), PLA (Polylactic Acid), dan Hidroksiapatit (HA), yang dapat terbiodegradasi secara alami di dalam tubuh. Sistem yang diusulkan mampu meningkatkan kontrol pengguna secara signifikan, serta menjadi fondasi untuk sistem kontrol lengkap dalam pembuatan filamen biodegradable. Hal ini dilakukan dengan mengatur parameter motor untuk mencapai diameter filamen yang konsisten dengan deviasi minimal serta mengontrol laju ekstrusi pada printer guna memperbaiki ketidakstabilan filamen.Penelitian ini juga akan membandingkan filamen yang dihasilkan dengan filamen komersial PLA merek SUNLU. Perbandingan tersebut meliputi evaluasi parameter fisik seperti ukuran diameter hasil ekstrusi, densitas filamen setelah penambahan PCL dan HA, serta apakah penampang filamen membentuk lingkaran sempurna. Hasil dari penelitian ini akan memberikan wawasan lebih dalam tentang kualitas fisik filamen yang dihasilkan.
Gait Analysis of Ankle Joints of Indonesians at Low, Medium and High Speeds Novriansyah, Robin; Hadi, Jason Reynald; Bakhtiar, Yuriz; Husni, Amin; Ismail, Rifky
Medica Hospitalia : Journal of Clinical Medicine Vol. 11 No. 3 (2024): Med Hosp
Publisher : RSUP Dr. Kariadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36408/mhjcm.v11i3.1175

Abstract

Background : Amputation is a loss of body part, and most amputations are lower extremity amputations. The most common is transtibial amputation. After an amputation a person will need a prosthesis. However, up to now there has been no functional prosthesis specifically made for Indonesians who undergo transtibial amputation because the ankle joint gait data that are currently used are European gait data. So it is necessary to measure the normal gait data of Indonesians' ankle joint. The aims of this study was to measure the normal gait data of the ankle joint of Indonesian population Methods : The Research sample is Indonesians aged 18–26 years with normal gait measured by the 2DMA (two-dimensional motion analyzers) at low, medium and high speeds. The resulting data is searched for the mean and standard deviations and then an independent t-test is performed between normal gait data of Indonesians and Europeans Results : Indonesians have a range of maximum dorsiflexion values for low, medium, and high speeds of : 7.9°, 8.3°, 8.9° and maximum plantar flexion for low, medium, and high speeds of 13.4°, 20.6°, 26°. In the comparison test there was a significant difference between the maximum plantar flexion angle of Indonesians and Europeans. Conclusion : Indonesians have a range of maximum dorsiflexion values for low, medium, and high speeds of 7.9°, 8.3°, 8.9° and maximum plantar flexion for low, medium, and high speeds of: 13.4°, 20.6°, 26°. There is a difference between the normal gait of the ankle joint of Indonesians and Europeans.
Vapor compression refrigeration system with air and water cooled condenser: Analysis of thermodynamic behavior and energy efficiency ratio Setiyo, Muji; Rusdjijati, Retno; Habibi, Ilham; Rochman, Muhamad Latifur; Purnomo, Bagiyo Condro; Pertiwi, Fungky Dyan; Waluyo, Budi; Ismail, Rifky; Kolakoti, Aditya
Teknomekanik Vol. 7 No. 2 (2024): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v7i2.31972

Abstract

This study presents the analysis of thermodynamic behavior and energy efficiency of a vapor compression refrigeration system with two types of condensers: air-cooled (ACC) and water-cooled (WCC). The main objective is to assess the system performance by comparing the Coefficient of Performance (COP) and Energy Efficiency Ratio (EER) under both condenser configurations. During a 12-hour test period, data on refrigerant pressure, temperature, and electrical energy consumption were collected and analyzed. The results show that the WCC system outperforms the ACC system, showing a 5.7% increase in heat rejection and a 4.2% increase in cooling capacity. In addition, the WCC system exhibits a lower compressor duty cycle and consumes less electrical energy, resulting in a higher total EER of 5.658 compared to ACC of 1.945. These findings suggest that integrating a water-cooled condenser into a refrigeration system can significantly improve energy efficiency and reduce operating costs, making it a viable option for commercial applications in tropical regions.
Design, fabrication, and performance testing of an energy storage and return (ESAR) foot prosthesis made of prepreg carbon composite Ismail, Rifky; Nursafitri, Murti Ayu; Fardinansyah, Akmal Putra; Fitriyana, Deni Fajar; Bayuseno, Athanasius Priharyoto; Siregar, Januar Parlaungan; Setiyo, Muji; Istiqomah, Alfiana Fitri; Sulistyo, Sulistyo
Mechanical Engineering for Society and Industry Vol 5 No 1 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.12652

Abstract

The high demand for prosthetics in Indonesia is not followed by the ability and quality of local production to fulfill the community's needs. There is a lack of comprehensive data regarding the specific challenges encountered by local prosthetic manufacturers in Indonesia, particularly in terms of technological limitations. This study aims to understand the effect of design parameters on the performance of the energy storage and return (ESAR) foot prosthesis prototype in normal walking activities for amputees. Three different designs were created according to commercial products, and a convergence test was conducted to ensure accurate results. Finite element method (FEM) analysis was used to determine the amount of deformation that occurred in each design made when applied with 824 N axial force. The ESAR foot prosthesis prototype made from carbon prepreg was fabricated using an out-of-autoclave method, and the mechanical testing was performed with a compressive test. The results indicated that the optimal design for the ESAR foot prosthesis determined by the decision matrix scoring criteria was Design 3. The final scores for Designs 1, 2, and 3 were 54, 53, and 77, respectively. Design 3 is the easiest to manufacture, has the slightest complexity, and the lightest mass, and undergoes the least deformation during simulation, although it is the least attractive. The study found a significant difference in displacement between the deflections obtained from simulation and experiment. This occurred because the prototype was found to have delamination, which decreased the load-bearing ability of the prototype during compressive testing. Compressive testing on the prototype yielded a deflection of 22.695 mm in heel strike and 18.065 mm in toe-off positions, while FEM analysis showed 16.377 mm and 3.912 mm. Therefore, strict quality control is essential, especially when using materials such as carbon prepreg, which are prone to delamination if not properly processed.
Computational Assessment of Orthopedic Implant Durability Using Finite Element Analysis Haryanto, Ismoyo; Bagastomo, Riondityo Soni; Ismail, Rifky; Siregar, Januar Parlaungan; Cionita, Tezara
Advance Sustainable Science Engineering and Technology Vol. 7 No. 3 (2025): May - July
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i3.1977

Abstract

Finite Element Analysis (FEA) provides a rapid and cost-effective method to evaluate orthopedic implants. This research investigates the mechanical performance and long-term durability of a seven-hole SS 316L Basic Fragment Set (BFS) reconstruction plate designed for pelvic fractures. Adhering to ASTM standards, material properties were defined via tensile testing (ASTM E8), while static and fatigue analyses were performed using a displacement control method in a four-point bending test setup in SOLIDWORKS 2024 (ASTM F382). The static analysis predicted failure from plastic deformation at a force of 367 N, with a maximum stress of 621.92 MPa. The fatigue simulation predicted a lifespan of 483,754 cycles. To validate the simulation, these computational results were compared to experimental data, demonstrating high accuracy with deviations of only 3.34% for maximum force and 1.19% for fatigue life. These findings confirm that FEA is a highly reliable tool for predicting mechanical performance, enabling the orthopedic industry to optimize implant designs, enhance patient safety, and improve production efficiency.
Upaya pencegahan sarkopenia melalui edukasi dan pengukuran kekuatan otot pada lansia Mustofa, Rizal; Julianti, Hari Peni; Ismail, Rifky; Priwintoko, Baharudin
Jurnal Pembelajaran Pemberdayaan Masyarakat (JP2M) Vol. 6 No. 3 (2025)
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/jp2m.v6i3.24034

Abstract

Sarkopenia merupakan kondisi degeneratif yang ditandai dengan penurunan massa dan kekuatan otot. Pengabdian ini bertujuan untuk mencegah sarkopenia melalui sosialisasi, edukasi, dan tindak lanjut pengukuran kekuatan otot pada masyarakat lansia di Kelurahan Randusari, Kota Semarang. Metode yang digunakan meliputi edukasi dan skrining kekuatan otot menggunakan alat electromyography sebagai indikator dini risiko sarkopenia. Electromyography merupakan alat ukur kekuatan kontraksi otot yang dapat digunakan untuk mengevaluasi kondisi otot. Proses screening sarkopenia diawali dengan identifikasi gejala melalui kuesioner, dilanjutkan dengan pengukuran kekuatan otot menggunakan electromyography sebagai indikator utama. Jika kekuatan otot menunjukkan nilai di bawah ambang batas, maka dilakukan evaluasi performa fisik, seperti kecepatan berjalan, dilakukan untuk menentukan tingkat keparahan. Berdasarkan hasil pemeriksaan, sarkopenia diklasifikasikan menjadi probable, confirmed, atau severe. Hasil pengabdian menunjukkan peningkatan pemahaman peserta tentang pentingnya pola makan bergizi dan aktivitas fisik rutin, serta terdeteksinya kelompok lansia dengan risiko penurunan fungsi otot yang kemudian diarahkan untuk tindak lanjut intervensi kesehatan. Program ini memberikan dampak positif berupa peningkatan kesadaran pencegahan sarkopenia dan penguatan kapasitas komunitas dalam menjaga kesehatan otot lansia. Rekomendasi pengembangan program ini adalah pelaksanaan monitoring berkelanjutan dan pelibatan lebih luas dari pemangku kepentingan setempat untuk meningkatkan efektivitas pencegahan sarkopenia di masa depan.
Co-Authors . Jamari . Jamari . Jamari . Sugiyanto Abd. Rasyid Syamsuri Abdul Syakur Abid Muflih Ernandara Abram Ali Sasono Achmaditiya, Galuh Agung Warsito Agustinus Purna Irawan Ahmad, Zakki Kurniawan Akhlis Rahman Nurhidayat Akmal Putra Fardinansyah Alfiana Fitri Istiqomah Amin Husni Amrih Prayogo Ananto, Gilar P. Andrew Johan Andromeda, Trias Arifin, Zainal Ariyanto, Mochammad Arvy Yudha Sadewa Atanasius Priharyoto Bayuseno Athanasius Priharyoto Bayuseno Athanasius Priharyoto Bayuseno Aulia Salwa Alfaina Bagastomo, Riondityo Soni Bagiyo Condro Purnomo Bakhtiar, Yuriz Bayuseno Bayuseno Budi Setiyana Budi Setiyana Budi Setiyana Budi Waluyo Budiman, Rifky Ardiansyah Budy Wiryawan Candratama, Aditya Cionita, Tezara D.J. Schipper Deni Mulyana Deni Mulyana Devit Ardiyansyah Dinulloh, Muhammad Rafli Wiratama Dosma Ruben R Nababan Dwi Pudjonarko Dwi Setyawan Egastya Fazal Santoso Eko Saputra Eko Saputra Eko Wahyu Saputro Elga P. Yuandi Eva Hertnacahyani Herraprastansi Fachri Adam Fardinansyah, Akmal Putra Ferdian Gamalea Delasta Fiki Firdaus Fiki Firdaus Fitriyana, Deni Fajar Friady Gumilar Fungky Dyan Pertiwi Gilar P. Ananto Gunawan Dwi Haryadi Gusti Andika Ramadanu Hadi, Jason Reynald Haira, Mahmuda Hanif Nur Kholid Hari Peni Julianti Hasnil, Nabiilah Helmy Purwanto Hidayati, Uslah Ilham Fajar Bagaskara Ilham Habibi, Ilham Imam Syafaat Irfan, Afi Muhammad Ismail, Nur Hidayah Ismoyo Haryanto Istiqomah, Alfiana Fitri Iwan Budiwan Anwar J. Jamari Jamari Jamari Januar Parlaungan Siregar Januar Parlaungan Siregar Joga D. Setiawan Joga Dharma Setiawan Joga Dharma Setiawan Joshua W. Syafei Joyanto Sitohang Kharisma A. Pambudi Kistriyani, Lilis Kolakoti, Aditya Kristianto, Henry Luky Hidayat M.Pd S.T. S.Pd. I Gde Wawan Sudatha . Machrizal Noor Mahendra, Arya Makhfudz Ali Michael Ambarita Mochammad Ariyanto Mochammad Ariyanto Mochammad Ariyanto Moh Fawaid Moh. Erlangga Aditya Rifandi Mohammad Tauviqirrahman Muchammad Muchammad Muhammad Dzaky Arizsa Athallah Muhammad Dzulfikar Muhammad Fahrizal Almeir Muhammad Hafizh Mubarak Muhammad Ihya Mahendra Adi Muhammad Ikhsan Muhammad Khafidh Muhammad Rezha Assalam Muhammad Ritzky Novhar Muhammad Ulfan Arif Muji Setiyo Munadi Munadi Murti Ayu Nur Safitri Mustofa, Rizal Nizar Rahman Aprilitama, Nizar Rahman Norman Iskandar Novianto, Arief Novriansyah, Robin Nursafitri, Murti Ayu P., Alhakim B. P., Biyan B. Pambudi, Kharisma A. Pangesti, Adelia Pangestu, Wahyu Adi Poedji Haryanto Prasetyo, Adzan Jati Prawibowo, Hartanto Priwintoko, Baharudin Putera, Finny Pratama Putra, Mileno Marandria Rahmawati, Maria Belladonna Rahmi Isma Asmara Putri Rama Sinatria Wisesa Reswara, Ghani Widyatna Ricky Prawira Rilo Berdin Taqriban Riski Maulana Rizal Mustofa Rochman, Muhamad Latifur Rohmatullah, Muhammad Rusdjijati, Retno Samsul Alamsyah Perwiranegara Saputra, Bagus Ari Siregar, Januar Parlaungan Sitanggang, Frandy A Sri Nugroho Sugiyanto - Sugiyanto Sugiyanto Sugiyanto Suhartini Suhartini Ismail Sukarno Sukarno Sulardjaka Sulardjaka Sulistyo Sulistyo Sulistyo Sulistyo Suryawan, Donny Susilo Adi Widyanto Syafa’at, Imam Syafei, Joshua W. Tavan Faiz Dhiahaqi Tezara Cionita Thesar Aditya Nurcholis Toni Prahasto Trianggoro Budisulistyo Turasno, Buang Wahid, Muhammad Abdul Wahyu Hidayat Wijayanto, Juli Eri Yasya Khalif Perdana Saleh Yogi Reza Ramadan, Yogi Reza Yopi Harwinanda A Yosafat Keljeski Sinaga Yosua Wijaya Yotenka, Rahmadi Yuris Setyoadi Zainal Arifin