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INOVASI PRODUK GULA AREN CETAK MENJADI GULA SEMUT UNTUK MENINGKATKAN NILAI JUAL Handayani, Prima Astuti; Pribadi, Feddy Setio; Rusiyanto, Rusiyanto; Sariyoga, Setiawan; Putri, Melinia Rahmahani; Andriyani, Ririn
Jurnal Pengabdian Dinamika Vol 9, No 1 (2022)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/dinamika.v9i1.17347

Wilayah Dukuh Sukir Desa Pakis Kecamatan Limbangan Kabupaten Kendal, merupakan daerah yangterletak pada dataran tinggi. Di wilayah tersebut terdapat sawah dan sebagian besar hutan yang banyaktumbuh pohon Aren. Hampir setiap rumah mempunyai pohon aren dan 80% penduduknya sebagaipenyadap nira aren. Proses penyadapan dilakukan pada pagi dan sore hari, selanjutnya nira aren diolahmenjadi gula aren cetak. Mitra pada kegiatan Program Kemitraan Masyarakat (PKM) ini adalahkelompokperajingulaarencetak“MuyaArenga”,yangmengarahkeekonomiproduktif.Permasalahan yang dihadapi mitra yaitu diperlukan inovasi untuk meningkatkan nilai jual produk gulaaren cetak menjadi gula semut dan dibutuhkan metode pemasaran yang dapat menjangkau konsumenyang lebih luas dan dapat meningkatkan pemasaran pada masa pandemi ini. Tujuan dari kegiatan PKMini meningkatkan nilai jual produk gula aren cetak menjadi gula aren semut yang mempunyai nilaipeningkatan 4 kalinya, sehingga dapat meningkatkan kesejahteraan perajin gula aren serta masyarakatDukuhSukirpadaumumnya.MetodekegiatanpengabdianPKMyangdilakukanantaralainkoordinasi, pembuatan alat proses pembuatan gula semut, pembuatan kemasan produk dan merekdagang serta pelatihan pengelolaan pemasaran online yang memanfaatkan teknologi informasi. Dandilakukan pendampingan dan evaluasi pelaksanaan program dan keberlanjutan program di lapangan.Hasil dari kegiatan PKM adalah mitra Muya Arenga sudah dapat memproduksi gula aren semut yangsiap untuk dipasarkan. Gula aren semut yang dihasilkan mempunyai karakteristik sesuai SNI 01-3743-1995, dengan kandungan gula sukrosa 81,78%, gula reduksi 5,78% dan energi 358,64 kal/100gr.

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

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

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 Â°C, 900 Â°C, 950 Â°C, 1000 Â°C and 1050 Â°C. The crucible materials are made of graphite, kaolin, and castable cement. The firing process employs a heating rate of 5 Â°C/min and a holding timeÂ 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 Â°C. The lowest porosity value of 41% was attained at firing temperature of 1050 Â°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 Â°C.

Pengaruh Kecepatan Pemotongan dan Ketebalan Bahan Terhadap Kekerasan dan Kekasaran Permukaan Baja AISI 1045 Menggunakan CNC Plasma Arc Cutting Ami Rima Rahmawati; Samsudin Anis; Rusiyanto Rusiyanto
Jurnal Dinamika Vokasional Teknik Mesin Vol. 4 No. 2 (2019): Oktober
Publisher : Department of Mechanical Engineering Education

This experimental study aims to determine the effect of cutting speed and material thickness on the surface hardness and roughness resulting from the cutting of AISI-1045 steel using CNC Plasma Arc Cutting. The data analysis technique being used was descriptive statistics. The variables of cutting the AISI-1045 steel for the cutting speeds are 75 mm/min, 100 mm/min, and 125 mm/min. The variables for material thickness are 5 mm, 9 mm, and 13 mm. The experiment carried out were the hardness test using Micro-hardness Tester M800 and roughness test using Surfcorder SE-1700. The results show that the lower the cutting speed, the higher the surface hardness and roughness value, and vice versa. The great thickness of the material, the hardness produced and the roughness value is higher. When the cutting speed and thickness of the material value are high, the workpiece cannot be cut off. The lowest hardness and surface roughness values were 261.33 HV and 10.3 µm, respectively, using a cutting speed of 125 mm/min and the material thickness of 5 mm. The highest hardness value is 319.66 HV, using a cutting speed of 75 mm/min and a material thickness of 13 mm. The highest surface roughness value is 26.8 µm, which were obtained using a cutting speed of 75 mm/min and material thickness of 9 mm.Penelitian ini bertujuan untuk mengetahui pengaruh kecepatan pemotongan dan ketebalan bahan terhadap kekerasan dan kekasaran permukaan hasil pemotongan baja AISI-1045 menggunakan CNC Plasma Arc Cutting. Penelitian ini menggunakan metode eksperimen dan teknik analisis data yang digunakan adalah statistika deskriptif pada pemotongan baja AISI-1045 dengan kecepatan pemotongan 75 mm/min, 100 mm/min, 125 mm/min dan tebal bahan 5 mm, 9 mm, dan 13 mm. Pengujian kekerasan dilakukan menggunakan microhardness terster M800 dan pengujian kekasaran dilakukan menggunakan Surfcorder SE-1700. Hasil penelitian menunjukkan bahwa semakin rendah kecepatan pemotongan maka nilai kekerasan semakin tinggi dan nilai kekasaran permukaan semakin tinggi atau sebaliknya. Semakin besar ketebalan bahan yang digunakan maka nilai kekerasan yang dihasilkan semakin tinggi dan nilai kekasaran semakin tinggi atau sebaliknya. Semakin tinggi kecepatan pemotongan dan ketebalan bahan, benda kerja tidak dapat terpotong. Nilai kekerasan dan kekasaran permukaan paling rendah yaitu 261,33 HV dan 10,3 µm dengan kecepatan pemotongan 125 mm/min dan ketebalan bahan 5 mm. Nilai kekerasan yang paling tinggi yaitu 319,66 HV dengan menggunakan kecepatan pemotongan 75 mm/min dan ketebalan bahan 13 mm dan nilai kekasaran permukaan paling tinggi yaitu 26,8 µm dengan kecepatan pemotongan 75 mm/min dan ketebalan bahan 9 mm.

Kekuatan Bending dan Tarik Komposit Berpenguat Serat Eceng Gondok/Tebu Bermatrik Epoxy Widodo, Rahmat Doni; Sutanto, Herry; Fitriana, Deni Fajar; Rusiyanto, Rusiyanto; Darsono, Febri Budi
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1417

The use of natural fiber as composite material is growing rapidly due to excellent characteristics, environmentally friendly quality and low price. For this reason, natural fiber breaks the dominance of synthetic fiber composite previously used in industries, especially in automotive manufacturing. The purpose of this study is to determine the effect of fiber orientation on the flexural and tensile strength of water hyacinth-sugarcane fiber composite with epoxy matrix. The composite then be tested as an alternative to doortrim. Fiber orientation applied to specimens was random for sugarcane fiber, but continuous on water hyacinth fiber with angle variants of -45/45, 45/90, 45/45, and 90/90. Specimen standard for flexural test is ASTM D790-15 and ASTM D638-14 for tensile test. The study results show that the highest average value for flexural strength is 51.7 MPa of the 45/90 variant, while the lowest average value of 16.6 MPa is the 45/45 variant. Both 45/90 and -45/45 variants have the highest tensile strength of 30 MPa. The 90/90 variant records the weakest tensil strength value of 20 MPa. The highest flexural and tensile strength values exceed minimum score of the SNI 01-4449-2006 and equal the values of panel assy backdoortrim. This experiment proves that fiber orientation affects mechanical properties of composite materials, especially in terms of flexural or tensile strength.

NUMERICAL ANALYSIS OF MOUNTING BRACKET STRUCTURE ON THE DAMPING EFFECT OF STABILIZER STEERING DAMPERS Wibowo, Muhammad Yusuf; Bahatmaka, Aldias; Rusiyanto, Rusiyanto; Fitriana, Deni Fajar; Ghyferi, Andi Abdullah; Anwar, Ahmad; Ridananda, Ayyub; Chasan, Ahmad
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1657

Due to bumps or holes in the road, certain regions' road surface is still unsuitable for riding at high speeds. Many motorcycles used stabilizer steering dampers to reduce weave and wobble. Bracket is a structure that holds the stabilizer steering dampers to the motorcycle steering. Bracket plays a significant role in maintaining the stabilizer steering dampers as well as stopping any vibration due to the dynamic conditions. This paper presents Finite Element Analysis of a bracket, which is analyzed material aluminum 6061 and aluminum alloy cast. In this study, we have explored using Static Analysis to calculate the internal force, displacement, and stress of structural brackets. Hence in this study, we have performed Modal Analysis to determine the natural frequencies of the bracket for safety. And also, we have performed Transient Analysis to study the behavior of structure brackets over time in response to time-varying loads and vibrations in dynamic conditions.

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

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

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 Â°C, 900 Â°C, 950 Â°C, 1000 Â°C and 1050 Â°C. The crucible materials are made of graphite, kaolin, and castable cement. The firing process employs a heating rate of 5 Â°C/min and a holding timeÂ 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 Â°C. The lowest porosity value of 41% was attained at firing temperature of 1050 Â°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 Â°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

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

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

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