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All Journal Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Jurnal Penelitian Enjiniring Fakultas Teknik Unhas Sabangka Abdimas Jurnal Pengabdian Masyarakat Sabangka Jurnal Multidisipliner Kapalamada Journal of Community Empowerment PHENOMENON : MULTIDISCIPLINARY JOURNAL OF SCIENCES AND RESEARCH Majalah Pengabdian Indonesia
Aji, Angga Asteriasti
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Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering Social Sciences Other

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Optimasi Kualitas Pembubutan Aluminium 6061 Akibat Perubahan Sudut Potong Pahat HSS Aminy, Ahmad Yusran; Aji, Angga Asteriasti
Jurnal Penelitian Enjiniring Vol 25 No 2 (2021)
Publisher : Center of Techonolgy (COT), Fakultas Teknik, Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jpe.112021.07

Abstract

Sejalan dengan perkembangan ilmu pengetahuan dan teknologi, suatu hasil produksi harus di imbangi dengan peningkatan kualitas hasil produksi, khususnya pada proses permesinan. Aluminium 6061 adalah paduan aluminium yang mengandung magnesium, silikon dan banyak digunakan pada komponen pesawat dan otomotif dimana dibutuhkan tingkat kekasaran yang rendah. Kekasaran sangat bergantung dari jenis pahat dan geometri pahat. Pada penelitian ini digunakan pahat HSS (High Speed Steel) dengan variasi pemotongan yaitu: variasi sudut potong (Kr) dipilih 65o, 75o, 85o dan 90o, putaran spindel (n) 200 rpm, 400 rpm, 600 rpm, pemakanan (f) 0.15 mm/put; 0,17 mm/put; 0.3 mm/put dan kedalaman pemakanan (a) 1 mm. Setelah dilakukan pembubutan setiap satu set variabel permesinan dilakukan pengukuran kekasaran dengan menggunakan mesin Laser 3D Measuring Laser Microscope OLS4100. Data pengukuran yang diperoleh digrafikkan dengan hubungan varibel permesinan dengan kekasaran dan untuk memperoleh kondisi optimal dilakukan analisis dengan menggunakan Metode Taguchi. Tujuan penelitian ini adalah untuk mengetahui kualitas pembubutan Aluminium 6061 terhadap perubahan sudut potong pahat. Dari hasil analisis didapatkan Sudut potong (Kr) yang paling optimal adalah 65° dengan nilai kekasaran 0,341 µm. Kata Kunci : Proses Permesinan, Bubut, Aluminium 6061, Pahat HSS, Geometri Pahat.
SOSIALISASI DAN PROMOSI (SOSPRO) SELEKSI PENERIMAAN MAHASISWA BARU TAHUN 2024 PADA SMK NEGERI 2 KENDARI Badia, Bahdin Ahad; Darwis, Mardis; Defi, Sry; Larobu, Feliks Eldad; Aji, Angga Asteriasti
Journal of Community Empowerment Vol 3, No 1 (2024): Juni
Publisher : Universitas Muhammadiyah Mataram

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

Abstract

ABSTRAK                                                                            Sosialisasi dan promosi penerimaan mahasiswa baru merupakan langkah penting dalam menarik minat calon mahasiswa. Kegiatan ini bertujuan untuk memperkenalkan Seleksi Penerimaan Mahasiswa Baru Politeknik Tridaya Virtu Morosi tahun 2024 kepada siswa dan siswi Sekolah Menengah Kejuruan Negeri 2 Kendari, Kota Kendari, Provinsi Sulawesi Tenggara. Metode yang digunakan meliputi presentasi, wawancara, distribusi brosur, dan diskusi interaktif dengan siswa dan guru di sekolah-sekolah terkait. Kegiatan ini bertujuan untuk memberikan informasi lengkap mengenai proses seleksi, program studi yang ditawarkan, persyaratan pendaftaran, dan prospek karir lulusan Politeknik Tridaya Virtu Morosi. Mitra sasaran dari kegiatan ini adalah siswa kelas 12 yang akan segera lulus dan guru-guru yang terlibat dalam proses bimbingan karir di SMK Negeri 2 Kendari, dengan jumlah peserta mencapai 150 siswa dan 10 guru. Hasil kegiatan menunjukkan bahwa informasi mengenai seleksi penerimaan dan program studi dapat disampaikan dengan baik. Respon positif dari pihak sekolah dan siswa terlihat dari antusiasme yang tinggi dan banyaknya pertanyaan yang diajukan. Kegiatan sosialisasi ini diharapkan dapat meningkatkan jumlah pendaftar dan membantu siswa dalam memilih perguruan tinggi yang sesuai dengan minat dan bakat mereka.Kata kunci: sosialisasi dan promosi, penerimaan  mahasiswa baru, SMK, efektivitas program, pendidikan tinggi ABSTRACTThe purpose of this activity is to conduct outreach and promotion related to the 2024 New Student Admission Selection for Politeknik Tridaya Virtu Morosi to students of Sekolah Menengah Kejuruan Negeri 2 Kendari, Kota Kendari, Sulawesi Tenggara Province. The implementation methods used include presentations, interviews, brochure distribution, and interactive discussions with students and teachers at the related schools. The results achieved are the successful dissemination of information regarding the New Student Admission Selection, the study programs offered, registration requirements, and career prospects for graduates of Politeknik Tridaya Virtu Morosi to prospective new students. This outreach activity received positive responses from the schools and students, as evidenced by the enthusiasm and numerous questions raised. The target partners for this activity are 150 twelfth-grade students who will soon graduate and 10 teachers involved in career guidance at SMK Negeri 2 Kendari. The results indicate that the information on the admission selection and study programs was well conveyed. The positive response from the schools and students is demonstrated by the high enthusiasm and many questions asked. This outreach activity is expected to increase the number of applicants and help students choose the right higher education institution according to their interests and talents.Keywords:  socialization and promotion, new student admission, vocational high school, program effectiveness, higher education
RESTORATION AND RECONSTRUCTION OF BUILDING AND STRUCTURES IN KRASNODAR, RUSSIAN FEDERATION: A DEEP DIVE INTO MODERNIZATION AND URBAN RENEWAL Simanjuntak, Raja Agung Hasudungan; Darwis, Mardis; Rambak, Ezra Pasereng; Rahman, La; Wardani, Ayu; Aji, Angga Asteriasti
PHENOMENON : Multidisciplinary Journal Of Sciences and Research Vol 3 No 01 (2025): PHENOMENON : Multidisciplinary Journal Of Sciences And Research
Publisher : Pusat Studi Ekonomi Publikasi Ilmiah dan Pengembangan SDM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62668/phenomenon.v3i1.1405

Abstract

This article explores the complex landscape of building reconstruction in Krasnodar, Russia, a city experiencing rapid urban development [3][6]. It examines the drivers behind reconstruction projects, focusing on the need to address both objective and subjective obsolescence in civil and industrial buildings. The machine-building complex of the Krasnodar region includes enterprises of oil and gas, railway, agricultural and food engineering. The study highlights the multifaceted goals of modern reconstruction, including enhancing living comfort, increasing residential capacity, and improving the urban environment[3]. It also delves into the challenges faced during urban reconstruction, such as managing increased loads on foundations, working within confined construction sites, and modernizing existing utilities. The article further examines the diverse repair strategies employed, emphasizing the importance of tailoring methods to specific building materials, damage extent, and site conditions. Ultimately, it underscores the need for a holistic and integrated approach to reconstruction, balancing progress and preservation to create sustainable, resilient, and aesthetically pleasing urban spaces that enhance the quality of life for Krasnodar's residents[3][4].
ANALYSIS OF THE EFFECT OF MACHINING VARIABLES ON SURFACE ROUGHNESS AND VIBRATION AMPLITUDE IN TURNING AISI 1045 STEEL USING THE TAGUCHI METHOD Aji, Angga Asteriasti; Cesar Putra, Fachrizal; Badia, Bahdin Ahad; Idris Putra, Muhammad; Sahputra, Wahyu Puji; Darwis, Mardis; Hasudungan Simanjuntak, Raja Agung
PHENOMENON : Multidisciplinary Journal Of Sciences and Research Vol 3 No 01 (2025): PHENOMENON : Multidisciplinary Journal Of Sciences And Research
Publisher : Pusat Studi Ekonomi Publikasi Ilmiah dan Pengembangan SDM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62668/phenomenon.v3i1.1406

Abstract

The development of the manufacturing industry is growing very rapidly so that the products of the manufacturing industry must have high quality, especially machining products such as turning products. This research investigates the effect of turning parameters, namely feed and spindle rotation on surface roughness and vibration amplitude of turning AISI 1045 steel using carbide tools. Surface roughness measurements were taken using an OLS4100 Microscope and vibration amplitude was measured using a Vibxpert II. From the results of the analysis conducted, the feed factor is the most significant factor on the results of surface roughness and vibration amplitude. The most optimal machining parameters for surface roughness are feed 0.1 mm/put (lvl 1), spindle speed 400 rpm (lvl4) with a surface roughness value of 4.757 µm. The most optimal machining parameters for vibration amplitude are feed 0.1 mm/put (lvl 1) and spindle speed 100 rpm (lvl 1) with a vibration amplitude value of 0.11 m/s.
REKAYASA PROSES EKSTRAKSI DAN PENGELOLAHAN BIJI NIKEL: TEKNOLOGI, TANTANGAN, DAN PROSPEK MASA DEPAN Sahputra, Wahyu Puji; Badia, Bahdin Ahad; Putra, Muhammad Idris; Putra, Fahrizal Cesar; Aji, Angga Asteriasti
Jurnal Multidisipliner Kapalamada Vol. 4 No. 02 (2025): JURNAL MULTIDISIPLINER KAPALAMADA
Publisher : Pusat Studi Ekonomi, Publikasi Ilmiah dan Pengembangan SDM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62668/kapalamada.v4i02.1546

Abstract

Global nickel demand is rapidly increasing in line with the transition to low-carbon technologies, particularly in the electric vehicle battery industry. This study conducts a systematic literature review of 40 publications (2020–2025) on nickel ore extraction technologies, challenges, and sustainable future prospects. About 55% of the studies discuss pyrometallurgy (RKEF, Blast Furnace) with Ni recovery of 90–95%, energy consumption of 5,500–6,500 kWh/t, and CO? emissions of 15–25 t/t Ni. Around 30% examine HPAL, which processes low-grade limonite with lower energy use, high investment (>USD 1 billion), and complex waste management. The remaining 15% focus on bioleaching (75–85% recovery, ~80% lower energy use, though with long processing time) and selective reduction (Fe?O? reduction at 1,100–1,200 °C, 15–20% lower energy consumption, Ni recovery of 90–93%). Challenges include ore mineralogy variation, nickel price fluctuations, and environmental impact. As the world’s top producer (~50% in 2024), Indonesia must optimize downstream policy and sustainability. Future prospects include commercializing alternative technologies and integrating renewable energy to reduce carbon footprint by up to 60%.
PENDIDIKAN VOKASI SEBAGAI PILAR PENDIDIKAN TINGGI YANG RESPONSIF DI ERA INDUSTRI 4.0 INDONESIA EMAS 2045: MEMBANGUN KESADARAN GENERASI MUDA KONAWE Simanjuntak, Raja Agung Hasudungan; Darwis, Mardis; Wardani, Ayu; Rahman, La; Badia, Bahdin Ahad; Aji, Angga Asteriasti; Putra, Fachrizal Cesar
Jurnal Pengabdian Masyarakat Sabangka Vol 4 No 03 (2025): Jurnal Pengabdian Masyarakat Sabangka
Publisher : Pusat Studi Ekonomi, Publikasi Ilmiah dan Pengembangan SDM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62668/sabangka.v4i03.1480

Abstract

This community service activity aimed to raise awareness among youth in Konawe Regency about the importance of vocational education as a practical and industry-relevant higher education pathway in the era of Industry 4.0 towards Golden Indonesia 2045. The implementation involved identifying information needs, preparing outreach materials, coordinating with target schools, conducting on-site socialization, and evaluating outcomes through questionnaires. The results revealed improved understanding and interest in vocational education, a shift in perceptions, and increased recognition of local vocational institutions. This program also bridged the information gap and strengthened connections between schools and vocational institutions. The activity effectively encouraged youth participation in vocational education as a strategy to develop competitive human resources in Konawe.
Analisis Pengaruh Variabel Permesinan Terhadap Kekasaran Permukaan dan Amplitudo Getaran pada Pembubutan Baja AISI 1045 Menggunakan Metode Taguchi Aji, Angga Asteriasti; Putra, Fachrizal Cesar; Darwis, Mardis; Hasudungan Simanjuntak, Raja Agung
Jurnal Penelitian Enjiniring Vol 28 No 2 (2024)
Publisher : Center of Techonolgy (COT), Fakultas Teknik, Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jpe.112024.01

Abstract

Perkembangan Industri manufaktur yang berkembang sangat pesat sehingga hasil Produk dari industri manufaktur harus memiliki kualitas yang tinggi, terutama produk hasil permesinan seperti produk pembubutan. Baja AISI 1045 adalah salah satu jenis baja karbon rendah dengan kandungan karbon sebesar 0,43 hingga 0,50%. Itu sering digunakan di pasar karena banyak keunggulannya dan harganya yang murah. Getaran yang terjadi selama proses pembubutan dapat menyebabkan efek yang tidak dikehendaki, seperti kebisingan, pengukuran yang salah, dan hasil pembubutan yang tidak optimal. Penilitian ini menyelediki pengaruh dari parameter pembubutan yaitu feed dan putaran spindel terhadap kekasaran pemukaan dan amplitudo getaran pembubutan baja AISI 1045 dengan menggunkan pahat karbida. Pengukuran kekasaran permukaan dilakukan menggunakan Microscope OLS4100 dan amplitudo getaran diukur menggunakan vibxpert II. Analisis yang dilakukan dari hasil pengukuran menggunakan perangkat lunak Minitab Statistical Software 22. Dari hasil analisis yang dilakukan, faktor feed merupakan faktor yang paling signifikan terhadap hasil kekasaran permukaan maupun amplitudo getaran. Parameter permesinan yang paling optimal terhadap kekasaran permukaan yaitu adalah feed 0.1 mm/put (lvl 1), kecepatan spindle 400 rpm (lvl4) dengan nilai kekasaran permukaan 4.757 µm. Parameter permesinan yang paling optimal terhadap Amplitudo getaran yaitu feed 0.1 mm/put (lvl 1) dan kecepatan spindle 100 rpm (lvl 1) dengan nilai amplitudo getaran adalah 0.11 m/s.
Optimasi Parameter Pembubutan Baja AISI 1045 Menggunakan Metode Taguchi Aji, Angga Asteriasti; Badia, Bahdin Ahad; Putra, Muhammad Idris; Putra, Fachrizal Cesar; Sahputra, Wahyu Puji; Darwis, Mardis; Simanjuntak, Raja Agung Hasudungan
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 11, No 2 (2025): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v11i2.13719

Abstract

AbstrakIndustri manufaktur mengalami pertumbuhan pesat, sehingga produk yang dihasilkan, terutama melalui proses permesinan seperti pembubutan, harus memiliki kualitas yang tinggi. Penelitian ini bertujuan untuk menganalisis pengaruh parameter pembubutan, seperti feed dan putaran spindle, terhadap kekasaran permukaan dan amplitudo getaran pada pembubutan baja AISI 1045 menggunakan pahat karbida. Pengukuran kekasaran permukaan dilakukan dengan Microscope OLS4100, sementara amplitudo getaran diukur menggunakan VibXpert II. Data yang diperoleh dianalisis dengan menggunakan Minitab Statistical Software 22. Hasil analisis menunjukkan bahwa feed memiliki pengaruh paling signifikan terhadap kekasaran permukaan dan amplitudo getaran. Parameter pembubutan yang paling optimal untuk menghasilkan kekasaran permukaan terbaik adalah feed 0,1 mm/put (lvl 1) dan kecepatan spindle 400 rpm (lvl 4), dengan nilai kekasaran permukaan sebesar 4,757 μm. Sementara itu, parameter yang paling optimal untuk mengurangi amplitudo getaran adalah feed 0,1 mm/put (lvl 1) dan kecepatan spindle 100 rpm (lvl 1), dengan nilai amplitudo getaran sebesar 0,11 m/s.
The Importance of Higher and Vocational Education for Students' Future at Kendari City High School Badia, Bahdin Ahad; Putra, Muhammad Idris; Fathur Rachim, La Ode Muhamad; Rahman, La; Darwis, Mardis; Putra, Fachrizal Cesar; Larobu, Feliks Eldad; Rambak, Ezra Pasereng; Gamsir, Laode Abdul; Defi, Sry; Fatana, Ahmad; Jalil, Abdul; Makkajareng, Nizar Fauzan; Aji, Angga Asteriasti; Hasudungan Simanjutak, Raja Agung
Majalah Pengabdian Indonesia Vol. 1 No. 2 (2024): Agustus 2024
Publisher : Teras Kampus as a member of PT Palem Edukasi Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69616/maindo.v1i2.25

Abstract

Vocational higher education plays an important role in providing a skilled and work-ready workforce. However, in Kendari City there is still an information gap regarding vocational higher education and career opportunities for graduates. This community service activity aims to introduce vocational higher education and disseminate information on new student admissions in 2024 in high schools in Kendari City. The methods used include presentations, discussions, and brochure distribution. The evaluation of the activity showed an increased understanding of vocational education, as well as an increased interest in pursuing it. The brochures provided were considered informative by the participants. This activity succeeded in increasing high school students' understanding and interest in vocational higher education, as well as providing clear information about the 2024 new student admissions. Results showed a 75% increase in understanding and 60% increase in interest in vocational education. As many as 90% of participants rated the brochure as very informative. It is expected that this activity will have an impact on increasing the number of applicants in vocational study programs and providing a better skilled workforce for industries in Kendari City.
Co-Authors Abdul jalil Ahmad Yusran Aminy AYU WARDANI, AYU Cesar Putra, Fachrizal Darwis, Mardis Defi, Sry Fatana, Ahmad Fathur Rachim, La Ode Muhamad Feliks Eldad Larobu Gamsir, Laode Abdul Hasudungan Simanjutak, Raja Agung Idris Putra, Muhammad Makkajareng, Nizar Fauzan Putra, Fachrizal Cesar Putra, Fahrizal Cesar Putra, Muhammad Idris Rahman, La Rambak, Ezra Pasereng Sahputra, Wahyu Puji Simanjuntak, Raja Agung Hasudungan