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All Journal Jurnal Teknik Mesin LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Journal of Engineering and Technological Sciences Indonesian Journal of Science and Technology SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Jurnal Fisika : Fisika Sains dan Aplikasinya Jurnal Ilmiah Teknik Industri Dinasti International Journal of Education Management and Social Science International Journal of Business, Technology, and Organizational Behavior (IJBTOB) Journal Of Human And Education (JAHE) Jurnal Lembaga Pengabdian Kepada Masyarakat Undana Malahayati International Journal of Nursing and Health Science
Jefri Semuel Bale
Jurusan Teknik Mesin, Fakultas Sains Dan Teknik, Universitas Nusa Cendana, Kupang
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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Perubahan Faktor Keausan Die Drawn UHMWPE Akibat Tegangan Kontak untuk Aplikasi Sendi Lutut Tiruan Jefri S. Bale
Jurnal Teknik Mesin (Sinta 3) Vol. 11 No. 2 (2009): OCTOBER 2009
Publisher : Institute of Research and Community Outreach, Petra Christian University

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

Abstract

The aim of this research is to study the effects of contact stress on the wear of die drawn UHMWPE GUR 1120 against nitrogen ion implanted cobalt chrome alloy used pin on plate unidirectional reciprocating movement wear test. A constant load was applied to each UHMWPE pin to produce a contact stress, whereas the contact stress was varied of 5 MPa, 9 MPa and 12 MPa with constant sliding velocity of 116.5 mm/s. The result shows the wear factor decreasing with increasing contact stress. The lowest contact stress (5 MPa) gives the highest wear factor that is: 2.67x10-7 mm3/Nm. The different wear factor is caused by increasing contact stress changed wear mechanism of surface contact. The lowest contact stress dominated by abrasive wear mechanism while along increasing contact stress changing the dominate wear mechanism into burnishing wear mechanism and also surface deformation wear mechanism. Abstract in Bahasa Indonesia: Penelitian ini bertujuan untuk mengetahui pengaruh tegangan kontak terhadap faktor keausan die drawn GUR 1120 UHMWPE berpasangan dengan cobalt chrome alloy yang diimplantasi ion berbasis nitrogen menggunakan pin on plate unidirectional reciprocating movement wear test. Pin die drawn UHMWPE dibebani sehingga menghasilkan tegangan kontak berkisar 5 MPa, 9 MPa dan 12 MPa dengan kecepatan gesekan konstan 116,5 mm/dtk. Dari hasil penelitian yang telah dilakukan, disimpulkan bahwa faktor keausan UHMWPE akan menurun seiring dengan meningkatnya tegangan kontak. Tegangan kontak terkecil (5 MPa) menghasilkan faktor keausan rata-rata UHMWPE yang terbesar yaitu 2,67x10-7 mm3/Nm. Perbedaan nilai faktor keausan ini disebabkan karena peningkatan tegangan kontak merubah mekanisme keausan pada permukaan kontak. Tegangan kontak terkecil di dominasi mekanisme abrasive wear sedangkan seiring peningkatan tegangan kontak mekanisme keausan didominasi oleh burnishing wear mechanism serta adanya mekanisme surface deformation wear. Kata kunci: Faktor keausan, tegangan kontak, die drawn UHMWPE, cobalt chrome alloy, implantasi ion nitrogen.
RANCANG BANGUN LEMARI PENGERING DAUN MARUNGGA (Moringa Oleifera) Ben Vasco Tarigan; Jefri S. Bale; Matheus M. Dwinanto; Muhamad Jafri; Daud P. Mangesa; Dominggus G. H. Adoe
Jurnal Fisika : Fisika Sains dan Aplikasinya Vol 5 No 2 (2020): Jurnal Fisika : Fisika Sains dan Aplikasinya
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/fisa.v5i2.1760

Abstract

Abstrak Pohon Marungga merupakan salah satu tumbuhan yang memiliki manfaat yang besar. Untuk daunnya sendiri dapat dijakdikan menjadi suplemen gizi dan juga sebagai bahan dasar kosmetik. Daun Marungga sendiri dapat dijadikan bubuk untuk selanjutnya diproses ke dalam berbagai kebutuhan. Sebelum dijadikan bubuk, sebelumnya daun tersebut harus dikeringkan. Pengeringan manual selama ini membutuhkan waktu yang panjang dan tidak higienis. Pada penelitian ini diperoleh hasil, proses pengeringan selama 19 jam diperolehhasil penurunan kelembaban tidak bisa dilakukan secara cepat. Hal ini disebabkan karena temperatur dalam ruangan tidak mampu memanaskan udara sekitar dengan cepat sehingga proses pengeringan cenderung lebih lambat. Dengan beban pengeringan 20 kg daun Marungga mentah, diperoleh sekitar 3 kg daun kering.Kata kunci: marungga; perpindahan panas; lemari Abstract Marungga tree is one of the plants that have great benefits. The leaves themselves can be transformed into nutritional supplements and also as a cosmetic base ingredient. Marungga leaves themselves can be used as a powder for further processing into various needs. Before being made into powder, the leaf must be dried beforehand. Manual drying so far requires a long time and is not hygienic. In this study the results were obtained, the drying process for19 hours obtained the result of humidity reduction could not be done quickly. This is because the temperature in the room is not able to heat the surrounding air quickly so the drying process tends to be slower. With a drying load of 20 kg of raw Marungga leaves, about 3 kg of dried leaves are obtained.Keywords: marungga; heat transfer; cabinets
ANALISIS KEKUATAN IMPAK KOMPOSIT HYBRID SERAT LONTAR DAN SERAT GELAS UNTUK APLIKASI HELM KENDARAAN BERMOTOR Andre Juanda Baru; Jefri S. Bale; Yeremias M. Pell
Jurnal Fisika : Fisika Sains dan Aplikasinya Vol 7 No 1 (2022): Jurnal Fisika : Fisika Sains dan Aplikasinya
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/fisa.v7i1.5894

Abstract

The fiber content of lontar fruit can be utilized in a non-metal composite substitute for a more expensive metal composite. Currently, non-metallic materials are widely used as substitutes for metal materials because they have various advantages, namely being lighter in weight, easier to shape, and cheaper. One of these non-metallic materials is fiberglass. The purpose of this study was to determine the effect of alkali treatment on the impact properties of polyester fiber reinforced palm fiber and glass fiber composites, the effect of concentrations of 5%, 10%, and 15% Alkali (NaOH) on the impact properties, and treatment time 0, 2, 4, and 6 hours on Impact properties of polyester composites reinforced with palm fiber and glass fibers. 20% of the test specimens were made according to the ASTMD256-04 standard and tested with an impact tester. The results of the impact test showed that composites with hybrid fibers (palm fiber and glass fiber) as well as composites with palm fiber which were treated with alkali tended to have greater impact properties than those not treated with alkali. Fiber-reinforced composites treated with 15% alkali had the highest average toughness, while the lowest impact toughness was composites with fiber reinforcement treated with 5% alkali. The length of time of treatment had an effect on the impact toughness of the composites.
Feasibility Study of Production of Double Blade Grass Cutting Machine Ery C. Bagaihing; Daud Pulo Mangesa; Jefri S. Bale
International Journal of Business, Technology and Organizational Behavior (IJBTOB) Vol. 2 No. 3 (2022): June | International Journal of Business, Technology and Organizational Behavio
Publisher : Garuda Prestasi Nusantara Consulting

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52218/ijbtob.v2i3.191

Abstract

Most breeders generally feed their livestock only with grass, but for the grass itself it will be food that is easily found and is mostly given to livestock. However, most people still use machetes or sickles to cultivate grass, therefore SMEs have emerged in dealing with grass processing. The tool made is a grass chopper machine, the machine that was created also has several variations, one of which is a double knife chopper machine made by one of the students of the Nusa Cendana University Kupang, namely Stenly Naitboho. Therefore, this research was conducted to assess the performance of the chopper machine based on a feasibility study, in terms of the percentage length of the chopped material and the consumption of fuel used along with the production costs of this tool. In completing this research, several methods are needed to launch it, namely literature study and observation. After using the method used, the results of the chopping can be found, namely the percentage of the length of the chopped material measuring < 5 cm (W1) obtained an average of 54.62%, while the average percentage of the length of the chopped material measuring > 5 cm (W2) is 45.28%. For the size of the good chopped results is 2-5 cm in accordance with SNI 7785.1:2003 concerning the requirements for the results of the forage chopping machine. Another result in this study is the consumption of fuel used during the census obtained an average of 0.6 /hour. Based on SNI 7580:2013 the requirements for chopper work for fuel consumption of this machine are in category A. Production costs are obtained at a price of Rp. 4,122,200/ unit. Keywords:Consumption, Fuel, Shredded, Production
Rancang Bangun Mesin Mixer Iodisasi Garam Halus Sistem Injeksi Skala Home Industri Dengan Metode VDI 2222 Dolvianus D. Manek; Daud P. Mangesa; Jefri S. Bale
Jurnal Ilmiah Teknik Industri Vol. 10 No. 2 (2022): Jurnal Ilmiah Teknik Industri : Jurnal Keilmuan Teknik dan Manajemen Industri
Publisher : Program Studi Teknik Industri, Fakultas Teknik Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jitiuntar.v10i2.18565

Abstract

Industri garam di Provinsi Nusa Tenggara Timur masih menggunakan cara manual dalam proses pencampuran garam dengan yodium yaitu dengan cara mengaduk bolak-balik setumpuk garam yang telah disemprotkan larutan iodat dalam garam dengan konsentrasi tertentu. Pencampuran seperti ini sangat tidak praktis, efisien dan efektif. Dari permasalahan tersebut perlu dilakukanya Rancang Bangun Mesin Mixer Iodisasi Garam Halus Sistem Injeksi  Skala Home Industri Dengan Metode VDI 2222 yang bertujuan untuk membantu proses iodisasi garam di Provinsi Nusa Tenggara Timur sehingga produksi garam konsumsi sesuai standar SNI 3556. Dari hasil perancangan menghasilkan mesin mixer iodisasi garam dengan wadah berbahan stainless steel berkapasitas 25 kg, pengaduk tipe dayung dengan putaran 60,76 rpm yang digerakan oleh motor listrik 0,5 HP 1400 rpm dengan menggunakan transmisi kombinasi puli dan sabuk untuk memperkecil putaran.  Sistem penyemprotan menggunakan sistem injeksi dengan tekanan berasal dari pompa DC 12 V dengan kecepatan aliran nozzle , kecepatan aliran  dan daya pompa 36 watt. Hasil pengujian kandungan yodium pada garam krosok sebelum proses iodisasi adalah 0 ppm, kemudian dilakukanya proses iodisasi dengan perbandingan komposisi pencapuran 25kg garam krosok, 1,25g kio3 dan 25ml air dan lama waktu pengadukan pada pengujian 1 = 3 menit,  pengujian 2 = 4 menit dan pengujian 3 = 5menit. Dan setelah dilakukanya proses pengadukan sehingga menghasilkan garam dengan kandungan yodium pada pengujian 1= 55,65 ppm, pengujian 2 = 53,83 ppm dan pada pengujian 3 = 49.16ppm. Dengan adanya alat ini nantinya diharapkan dapat meningkatkan kualitas prokduksi garam di NTT.
PELATIHAN PEMBUATAN DAN PEMANFAATAN ECO ENZYME DI KUB YOMAVI, BELLO Yeremias M. Pell; Jefri Samuel Bale; Jahirwan Ut Jasron; Wenseslaus Bunganaen; Daud P. Mangesa; Nurhayati Nurhayati; Rima Nindia Selan
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 6, No 4 (2022): Desember
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v6i4.11591

Abstract

ABSTRAKKegiatan pengabdian ini mengambil tema tentang pembuatan eco enzyme dan pemanfaatannya bagi lingkungan sekitar rumah tangga. Kegiatan ini merupakan jawaban atas keprihatinan sebagian besar masyarakat yang ada di KUB Yomavi, di RT 021, RW 001 Kelurahan Bello, Kota Kupang, tentang penanganan sampah organik rumah tangga yang cukup melimpah dan terbuang sehingga menimbulkan bau busuk di lingkungan sekitar rumah. Dari kegiatan ini masyarakat bisa memanfaatkan sampah-sampah organik ini sekaligus menjaga kelestarian lingkungan hidup. Metode kegiatan terdiri dari ceramah, diskusi, tanya jawab, simulasi dan praktek. Pembuatan eco enzyme dalam pelatihan ini yaitu sebanyak 70 liter dan akan dipanen setelah difermentasi selama 3 bulan sesuai dengan aturan pembuatan eco enzyme. Di akhir kegiatan pengabdian, tim juga berhasil membagikan eco enyme kepada masyarakat, sehingga masyarakat dapat lebih lanjut memanfaatkannya di rumah masing-masing. Hasil lain yang lebih penting yaitu masyarakat semakin sadar tentang manfaat eco enzyme bagi kelestarian lingkungan hidup, dan juga mendapatkan pengetahuan dan keterampilan tentang cara pembuatan eco enzyme  dari sampah rumah tangga berupa sisa kulit buah dan sayuran. Dengan demikian masyarakat pun bisa secara mandiri membuat eco enzyme ini di rumahnya. Kata kunci: sampah organik; eco enzyme; lingkungan hidup. ABSTRACTThis service activity takes the theme of making eco enzymes and their use for the environment around the household. This activity is an answer to the concerns of most of the people in KUB Yomavi, in RT 021, RW 001, Bello Village, Kupang City, regarding the handling of household organic waste which is quite abundant and wasted, causing a foul odor in the environment around the house. From this activity, the community can take advantage of this organic waste while preserving the environment. The method of activity consists of lectures, discussions, questions and answers, simulations, and practice. The production of the eco enzyme in this training is 70 liters and will be harvested after being fermented for 3 months according to the rules for making eco enzyme at the end of the service activity, the team also succeeded in distributing eco enzyme to the community, so that the community could further use it in their respective homes.  The more important result is that people are increasingly aware of the benefits of eco enzymes for environmental sustainability, and also gain knowledge and skills on how to make eco enzymes from household waste in the form of leftover fruit and vegetable peels. Keywords: organic waste; eco-enzymes; environment.
PERANCANGAN BODI MOTOR MENGGUNAKAN SERAT LONTAR DENGAN METODE VDI 2222 Jefrianus Bere; Jefri S. Bale; Rima Nindia Selan
Jurnal Fisika : Fisika Sains dan Aplikasinya Vol 8 No 1 (2023): Jurnal Fisika : Fisika Sains dan Aplikasinya
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/fisa.v8i1.11828

Abstract

The design of several vehicles by changing the design of the vehicle body and household materials using composites has already been carried out in Indonesia using various methods and using natural materials that are easy to find. A unique motorcycle body design can give an attractive impression from the appearance of the motorcycle in use, seen from the new physical conditions with the image of a motorcycle that is easily engineered in such a way that it becomes an opportunity for motorcycle manufacturers to design motorcycle bodies with natural materials that can received potential market share. One of the natural materials that can be made or designed to be used as an alternative to composite raw materials as motor designs that are easy to find in the NTT region is one of them is palm fiber, whose use is still limited.
PERANCANGAN ALAT RESIN TRANSFORMER MOULDING (RTM) SEBAGAI MESIN PENCETAK SPESIMEN KOMPOSIT BERPENGUAT SERAT ALAM DENGAN SISTEM INJEKSI MENGGUNAKAN METODE VDI 2221 Jefri Samuel Bale; Rima Nindia Selan; Antonius Fandie Tei Seran
Jurnal Fisika : Fisika Sains dan Aplikasinya Vol 7 No 2 (2022): Jurnal Fisika : Fisika Sains dan Aplikasinya
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/fisa.v7i2.9341

Abstract

Perkembangan di bidang teknologi dan sciences belakangan ini mendorong material komposit banyak di gunakan pada berbagai macam produk. Komposit yang diperkuat oleh serat alam telah banyak digunakan untuk aplikasi seperti aerospace, otomotif, alat olahraga, papan sirkuit, dan lain-lain. Dalam sebuah perancangan terdapat beberapa metode yang biasa digunakan, salah satunya adalah metode VDI 2221. Metode VDI 2221 menggunakan pendekatan sistematik terhadap desain untuk sistem teknik dan produk teknik. Metode VDI 2221 ini mempermudah perancang untuk membuat suatu produk sehingga perancangan produk dapat tercapai. Oleh karena itu penulis mempunyai rancangan untuk membuat alat resin transfer moulding (RTM) sebagai mesin pencetak spesimen komposit serat alam dengan sistem injeksi menggunakan metode VDI 2221 di harapkan dengan teknologi sistem injeksi bahan komposit yang dihasilkan memiliki kualitas yang baik. Hasil perancangan mesin pencetak spesimen komposit berpenguat serat alam ini berdimensi panjang 110 cm, lebar 35 cm dan tinggi 60 cm
PERANCANGAN MESIN PENEPUNG DAUN LAMTORO DENGAN MENGGUNAKAN METODE VDI 2222 Gama, Ronaldo Luis; Bale, Jefri; Tobe, Adi Y.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 10 No 01 (2023): April 2023
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v10i01.11510

Abstract

The method used in this research is the VDI 2222 method. The process of testing the tool is carried out by turning on the motor, and inputting the lamtoro leaves which will be floured into the tube, the results of the design of the lamtoro leaf powder machine with the VDI 2222 method and the results of the lamtoro leaf flour powder machine test, concluded as follows: Design of a lamtoro leaf crushing machine with engine dimensions, namely: Height 50 cm, Width 30 cm and Length 37 cm, and motor power ¼ hp and uses a belt and pulley transmission, by testing the weight of lamtoro leaves, namely 3000 gr (3 kg) with the required time of 420 minutes, then the flouring process is carried out so that it will produce lamtoro flour with a fineness level of 80 mesh. The design stages using the VDI 2222 method are carried out sequentially which can be adjusted to the needs.
Perancangan Pembangkit Listrik Tenaga Air Mini Dengan Turbin Spiral sayuna, jeri imanuel; Sanusi, Arifin; Bale, Jefri S.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 11 No 02 (2024): Oktober 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v11i02.16907

Abstract

Mini power plants certainly need water energy as the main ingredient. Although the source of electrical energy is already quite large in Indonesia, but in the countryside it is not fully able to enjoy it, many we often find along rural roads, especially in rice fields with very minimal lighting available. The use of water as irrigation of course we can also use as a hydroelectric power plant on a small scale, by utilizing the existing water flow we can make small-scale power generation equipment that adjusts the amount of irrigation water flow of rice fields. Therefore, the results of research on making mini hydroelectric power plants with the VDI 2222 method for street lighting in rice fields can be useful in the community. This tool has the same principle
Co-Authors Ada Kale, Ariency K. Alionvember R. Thei Anderias Umbu Roga Andre Juanda Baru Antonius Fandie Tei Seran Ben V. Tarigan Ben Vasco Tarigan Boesday, Louis Ferdinand Boy Bistolen Daud P. Mangesa Daud P. Mangesa Daud P. Mangesa Daud P. Mangesa Daud Pulo Mangesa Dion Rihi Dolvianus D. Manek Dominggus Godlief Heryson Adoe Ery C. Bagaihing Finsensius Lelu Gama, Ronaldo Luis Jahirwan Ut Jasron Jefrianus Bere Jemssy R. Rohi Kristomus Boimau Kristomus Boimau Manilapai, Jusuf R. Martinus K. Moto Matheus M. Dwinanto Muhamad Jafri Noorce Christiani Berek Nurhayati Nurhayati Orlando L. Almet Paulus Woru Rahmawati, Eka Muftiana Renold H. Modok Rima Nindia Selan Sanusi, Arifin sayuna, jeri imanuel Selan, Rima Tarigan, Ben Tarigan, Ben V. Tobe, Adi Yermia Wenseslaus Bunganaen Yeremias M. Pell Yeremias M. Pell Yeremias M. Pell Yorim A. Masus Yulius O. Bani