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All Journal Jurnal Kompetensi Teknik Jurnal Pendidikan Teknik Mesin Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran Sainteknol : Jurnal Sains dan Teknologi Rekayasa Mesin Media Mesin: Majalah Teknik Mesin R.E.M (Rekyasa Energi Manufaktur) Jurnal Jurnal Rekayasa Mesin Journal of Mechanical Engineering Learning JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Indonesian Journal of Engineering and Science (IJES) Automotive Experiences ABDINE Jurnal Pengabdian Masyarakat Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan Jurnal Pengabdian Dinamika Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran
Rusiyanto Rusiyanto, Rusiyanto
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Effect of Firing Holding Time on Density, Porosity, and Hardness, Crucible Materials Based on Evaporation Boats Hidayat, Wakhid Muhlisin; Rusiyanto, Rusiyanto; Widodo, Rahmat Doni; Sumbodo, Wirawan; Fitriyana, Deni Fajar
International Journal of Mechanical Engineering Technologies and Applications Vol. 3 No. 2 (2022)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2022.003.02.1

Abstract

Evaporation boats are conductive advanced ceramic composites with the best thermal evaporation source for metalizing applications. The short life time of the evaporation boats causes the metalizing industry to produce large amounts of evaporation boats waste. However, studies on the utilization of evaporation boat waste are still limited. Therefore, this study aims to determine the effect of firing holding time on the density, porosity, and hardness of crucible materials made from evaporation boats waste. The material used in this research is a mixture of evaporation boats waste powder, kaolin, and graphite, with a composition of 50%, 25% and 25%, respectively. During the mixing process, 15% of the water is added. The compacting process carried out with a compaction pressure of 25 MPa. The firing process is carried out at a temperature of 1000oC with holding times of 60, 90, 120, 150, and 180 minutes. The test results show that the holding time of firing has an effect on density, porosity, and hardness. The highest density value was 1,91 g/cm3 at a holding time of 180 minutes, and the lowest was 1,77 g/cm3 at a holding time of 60 minutes. The highest porosity value is 4,10% at a holding time of 60 minutes, and the lowest is 2,16% at a holding time of 180 minutes. The highest hardness value was 12,84 HV at a holding time of 180 minutes, and the lowest was 8,3 HV at a holding time of 60 minutes. The longer holding time in the firing process results in a decrease in the porosity content. The decrease in the porosity content results in an increase in density and hardness of the cruicible specimens.
Effect of Firing Temperature on Density, Porosity, Impact Strength, and Macro Structure of Crucible Materials Made from Graphite, Kaolin, and Castable Cement Latif, Abdul; Rusiyanto, Rusiyanto; Sunyoto, Sunyoto; Kriswanto, Kriswanto; Fitriyana, Deni Fajar
International Journal of Mechanical Engineering Technologies and Applications Vol. 3 No. 2 (2022)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2022.003.02.3

Abstract

Along with the advancement of modern times and technology, the metal sector plays a critical role in sustaining present growth. The industry's increased competitiveness has hampered the development of numerous small-scale metal casting industries. A crucible made of local graphite can only be used not more than ten melting cycles. This research aims to examine the influence of firing temperature on the density, porosity, impact strength, and macrostructure of graphite, kaolin and castable cement crucible materials. This research applies experiment method at various firing temperature, i.e. 850 °C, 900 °C, 950 °C, 1000 °C and 1050 °C. The crucible materials are made of graphite, kaolin, and castable cement. The firing process employs a heating rate of 5 °C/min and a holding time 2 hours. The results show that firing temperature influences the density, porosity, impact strength and macrostructure of crucible. The highest density at 1.86 grams/cm3 was obtained at the firing temperature of 1050 °C. The lowest porosity value of 41% was attained at firing temperature of 1050 °C. However, this value was still below the crucible index criterion. The highest impact strength of 0.003249 Joule/mm2 occurred for firing temperature of 1050 °C.
Addition of Germicidal UV-C Radiation Equipment in the Sterilization Process to Extend the Shelf Life of Cow's Milk Wulansarie, Ria; Rusiyanto, Rusiyanto; Dino Alfian, Rangga; Diyah Ayu Utami, Kiki; Rahmah, Ladunia; Izza Arinanda, Miftakhul; Dyah Pita Rengga, Wara
Rekayasa Vol. 22 No. 1 (2024)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/rekayasa.v22i1.6239

Abstract

Cow's milk provides essential human nutrients, including calcium, protein, and minerals. However, it is highly susceptible to bacterial contamination, which leads to rapid spoilage. Pasteurization is the most common method to process cow's milk, effectively reducing microbial levels. However, some heat-resistant bacteria can survive the pasteurization process, limiting its effectiveness in ensuring long-term milk safety. This study investigates the use of chemical engineering technology by combining pasteurization and UV-C radiation methods, either sequentially or simultaneously, to improve the effectiveness of milk sterilization. The use of combined techniques aims to leverage the strengths of both processes, achieving superior microbial reduction and extending milk shelf life. Different operating temperatures and radiation durations were tested to identify optimal processing conditions. The findings revealed that this combined approach achieved a significant bacterial reduction of 99.95%, decreasing the microbial count from an initial 1.9 × 10⁶ cfu/mL to 7.0 × 10² cfu/mL. Moreover, the shelf life of the milk was extended to five months, demonstrating the effectiveness of the hybrid method. The study also monitored the milk's acidity (pH) throughout the process, which remained within optimal conditions of 6.5 to 6.8. This indicates that the combined treatment does not compromise milk quality. Integrating pasteurization with germicidal UV-C radiation offers a promising alternative for milk sterilization, improving microbial control and significantly increasing the shelf life of cow's milk. The results suggest that this dual-method approach could be a valuable advancement in dairy processing, enhancing both safety and efficiency in the production and preservation of milk.
Peningkatan kompetensi elektronika siswa SMKN 4 Semarang melalui pelatihan rakit drone quadcopter Nugroho, Anan; Wahyudi, Wahyudi; Rusiyanto, Rusiyanto; Naryanto, Rizqi Fitri; Ghulamzaki, Muhammad; Mubarak, Raihan Fa'iq; Hidayatulloh, Dimas Restu
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 8, No 3 (2024): September
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v8i3.25385

Abstract

AbstrakPentingnya penguasaan teknologi bagi siswa Teknik Elektronika Industri di SMKN 4 Semarang dapat diwujudkan melalui pelatihan perakitan quadcopter yang mendukung pemahaman dan praktik langsung dalam menghadapi perkembangan teknologi. Tujuan dari kegiatan pengabdian ini adalah agar siswa dapat belajar dan memiliki pengetahuan dalam bidang elektronika, khususnya pemahaman terkait quadcopter. Metode pelaksanaan meliputi merumuskan masalah, menentukan komponen, penyampaian materi, praktik merakit, dan praktik menerbangkan quadcopter. Pelatihan perakitan quadcopter diadakan pada hari kamis, 25 April 2024, di SMKN 4 Semarang, dengan jumlah peserta sebanyak empat puluh siswa. Pelatihan berhasil membuka wawasan bagi siswa SMKN 4 Semarang untuk mengembangkan kompetensi elektronika dengan mengetahui komponen, cara merakit, dan cara menerbangkan quadcopter.  Kata kunci: elektronika; kompetensi; quadcopter; pelatihan; perakitan AbstractThe importance of mastering technology for Industrial Electronics Engineering students at SMKN 4 Semarang can be realized through quadcopter assembly training that supports understanding and direct practice in dealing with technological developments. The purpose of this service activity is for students to learn and have knowledge in the field of electronics, especially understanding related to quadcopters. The implementation method includes observation, formulating problems, delivering material, practicing assembling, and practicing flying the quadcopter. The quadcopter assembly training was held on Thursday, April 25, 2024, at SMKN 4 Semarang, with forty students participating. The training succeeded in opening insights for SMKN 4 Semarang students to develop electronic competencies by knowing the components, how to assemble, and how to fly the quadcopter.  Keywords: electronics; competency; quadcopter; service; assembly
Co-Authors - Jumaeri Abdul Latif Abdul Nasir, Abdul Aditya Lutfi Sulistyawan Afiefudin, Mohamad Ahmad Dahlan Aji, Danang Bayu Aldias Bahatmaka Ami Rima Rahmawati Andriyani, Ririn Anwar, Ahmad April Lianita Sari Aprilya, Chitra Basyirun Basyirun Boenasir Boenasir, Boenasir Bramansyah Badar Islami Budiarso Eko Chasan, Ahmad Darsono, Febri Budi Darun Naim, Darun Dewi Handayani Untari Ningsih Dino Alfian, Rangga Diyah Ayu Utami, Kiki Etty Soesilowati Fajri, Novila Rojabni Farokhi, Mohammad Farokhi, Mohammad Febri Budi Darsono Feddy Setio Pribadi Fendi Panca Wahyudi, Fendi Fiqih Adi Noor Susetyo Fitriana, Deni Fajar Fitriyana, Deni Fajar Ghulamzaki, Muhammad Ghyferi, Andi Abdullah Habiby, M. Nuril Anwar Hadi, Satrio Handayani Untari Ningsih, Dewi Heri Yudiono Hidayat, Wakhid Muhlisin Hidayatulloh, Dimas Restu Imam Sukoco Irfan, Saiful Izza Arinanda, Miftakhul Joko Sunaryo, Joko Jurdan Fulandy Siswoyo Kaisan, Idris Kiswadi, Kiswadi Kriswanto Kriswanto Kriswanto Kriswanto Kriswanto Kriswanto Kriswanto Kriswanto, Kriswanto M. Burhan Rubai Wijaya M. Nuril Anwar Habiby Masugino - Miftakhudin - Mubarak, Raihan Fa'iq Muhammad Harits Muhammad Khumaedi Musyono, Ari Dwi Nur Indriawan Nugroho, Anan Nurdin, Akhmad Nurrohmah, Sinta Indiarti Nurrohman, Ali Pramono Pramono Prasetya, Alfian Wahyu Prima Astuti Handayani Putri, Melinia Rahmahani Rachael Andika Rahmah, Ladunia Rahmat Doni W, Rahmat Doni Rahmat Doni Widodo Ria Wulansarie, Ria Ridananda, Ayyub Rifqi, M. Irfan Riska Surya Agnitias Riski Yustiar Prabowo, Riski Rizqi Fitri Naryanto Rizza, Ahmad Samsudin Anis Samsudin Anis Sari, Desi Riana Savitri Ramadhani Septianova, Brian Selvi Feliciano Setiawan Sariyoga, Setiawan Suharno, Muhamad Sunyoto Sunyoto Sutanto, Herry Suyitno Suyitno Triyanto, Sandy Wahyudi Wahyudi Wara Dyah Pita Rengga Wibowo, Muhammad Yusuf Widi Widayat Wirawan Sumbodo Zaenal Afroni, Zaenal Zaidan Priya Harsandi Zaifani, Muh. Alfian