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All Journal Jurnal Pendidikan Teknologi dan Kejuruan APTEKINDO Rekayasa Mesin Jurnal Inovator J-Proteksion: Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin Otopro Jurnal Pendidikan Teknik Mesin Undiksha Quantum Teknika Indonesian Values and Character Education Journal International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Nusantara of Engineering (NOE) Journal of The Indonesian Society of Integrated Chemistry

I Nyoman Pasek Nugraha

Universitas Pendidikan Ganesha

Author-ID : 332794

Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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PENGARUH FRAKSI VOLUME SERAT TERHADAP SIFAT MEKANIS KOMPOSIT MATRIKS POLIMER POLYESTER DIPERKUAT SERAT AGAVE SISAL Aprianto, Gede; Nugraha, I Nyoman Pasek; Dantes, Kadek Rihendra
Jurnal Pendidikan Teknik Mesin Undiksha Vol 4, No 1 (2016)
Publisher : UNIVERSITAS PENDIDIKAN GANESHA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jjtm.v4i1.8044

Penelitian ini bertujuan untuk mengetahui fraksi volume terbaik dari sifat mekanik komposit matriks polimer polyester yang diperkuat serat alam agave sisal. Sifat mekanik yang dimaksud adalah kekuatan impak dan mikrografi. Desain penelitian yang digunakan dalam penelitian ini adalah penelitian eksperimen dengan metode single factor repeated measures design. Pembuatan sampel komposit matriks polimer polyester yang diperkuat serat alam agave sisal menggunakan metode hand lay up. Variasi fraksi volume serat yang digunakan adalah 0%, 20%, 40%, dan 60%. Setiap fraksi volume serat yang diuji, dibuatkan masing-masing 10 (sepuluh) buah spesimen. Data-data yang diperoleh dalam penelitian ini di dapat dari energi serap (Es) pengujian impak yang selanjutnya diolah dan dianalisa menggunakan Anava As. Hasil penelitian menunjukkan bahwa : (1) Fraksi volume serat terbaik dalam pengujian impak adalah fraksi volume serat 40% dengan kekuatan impak sebesar 4.092,00818 J/m2, sedangkan fraksi volume serat terendah adalah fraksi volume serat 0% dengan kekuatan impak sebesar 604,50120 J/m2; (2) Berdasarkan hasil pengujian mikrografi dari patahan hasil pengujian impak menunjukkan bahwa secara umum pola patahan yang terjadi pada komposit adalah kombinasi dari patahan getas (brittle fracture) dan pull-out fibers fracture atau dikenal dengan patahan sikat (brush fracture). Kesimpulan dari penelitian ini adalah fraksi volume serat 40% memiliki sifat mekanik terbaik dibandingkan dengan fraksi volume serat lainnya sehingga dapat dijadikan sebagai salah satu bahan baku alternatif pengganti serat gelas, dimana kekuatan impak yang dihasilkan sebesar 4.092,00818 J/m2. Dilihat dari hasil pengujian mikrografi, secara umum dikategorikan memiliki pola patahan sikat (brush fracture).Kata Kunci : komposit, matriks polimer polyester, serat alam agave sisal, sifat mekanis This research aims to know the best fiber volume fraction on mechanical properties of agave sisal natural fiber which is reinforced by polyester matrix composites. Those mechanical properties are the impact strength and the micrographic. The research design used in this research is an experimental research with single factor repeated measures design method. The manufacture of agave sisal natural fiber which is reinforced by polyester matrix composites specimens used hand lay-up methods. The variations of the fiber volume fraction used were 0%, 20%, 40% and 60%. There are 10 (ten) pieces of specimens for each tested fiber volume fraction. The research data was obtained from specimens absorbed energy (Es). Then, they were processed and analyzed by using Anova As. The result of this research showed that: (1) the best fiber volume fraction during impact testing is 40% with 4.092,00818 J/m2 of the impact strength. Meanwhile, the worst fiber volume fraction is 0% with 604,50120 J/m2 of the impact strength; (2) based on the micrographic test, the fractures from the impact test showed that the pattern of those fractures generally consists the combination of brittle fractures and pull-out fiber fractures. This combination is known as brush fractures. The conclusion of this research is the 40% of fiber volume fraction has the best mechanical properties compared to the other fiber volume fraction. Thus, it can be used as the alternative raw material for fiberglass. The impact strength produced was 4.092,00818 J/m2. Based from the micrographic test, the fraction is categorized as the brush fractures pattern.keyword : agave sisal natural fiber, composite, material properties, polyester polymer matrix

PENGEMBANGAN MEDIA PEMBELAJARAN BERBASIS MACROMEDIA FLASH MATA PELAJARAN PEMELIHARAAN CHASIS DI SMK NEGERI 3 SINGARAJA Randi Wirdana, I Gede; Nugraha, I Nyoman Pasek; Dewi, Luh Joni Erawati
Jurnal Pendidikan Teknik Mesin Undiksha Vol 6, No 2 (2018)
Publisher : UNIVERSITAS PENDIDIKAN GANESHA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jjtm.v6i2.13650

Penelitian ini merupakan penelitian pengembangan yang bertujuan untuk menghasilkan media pembelajaran pada mata pelajaran pemeliharaan chasis di SMK N 3 Singaraja. Kelayakan media pembelajaran ini diperoleh berdasarkan hasil pengujian data, yang didapat dari hasil pengisian angket kelayakan media pembelajaran pemeliharaan chasis. Telah melewati tahapan pengembangan media yaitu analisis kebutuhan, desain produk, desain media, revisi media, revisi produk, validasi, uji coba produk, serta revisi produk akhir. Validasi meliputi validasi dari para ahli materi atau ahli isi dan ahli media pembelajaran. Uji coba media dilaksanakan pada siswa kelas XI ( sebelas ) jurusan teknik sepeda motor di SMK N 3 Singaraja. Aspek kelayakan isi/mata pelajaran yaitu 87,50% sehingga termasuk kedalam kriteria sangat baik sehingga layak digunakan dalam pembelajaran. Dalam aspek kelayakan media sebesar 88,75% sehingga termasuk kedalam kriteria sangat baik sehingga layak digunakan dalam pembelajaran. Dalam uji coba perorangan yaitu sebesar 81,25%, sedangkan uji coba kelompok kecil yaitu sebesar 84,37% dan dalam aspek kelayakan media dan isi dalam uji coba lapangan yaitu sebesar 87,50% sehingga termasuk dalam kriteria sangat baik dan layak digunakan pada saat proses belajar.Kata Kunci : Media Pembelajran, Pemeliharaan Chasis, validitas. This research was a development research aimed to produce learning media on the subject of Chasis maintenance at SMK N 3 Singaraja. The feasibility of learning media was obtained based on the results of data testing, obtained from the results of questionnaires filling the feasibility of learning media process on chasis maintenance subjects had passed the development. Stage of needs analysis media, product design, media design, media revision, product revision, validation, product testing, as well as final product revisions. Validation included validation from content experts and learning media experts. Media trials were conducted on students of class XI (eleven) majoring in motorcycle engineering at SMK N 3 Singaraja. The content/subjects feasibility aspect was 87.50% which categorized into very good criteria therefore it was suitable to be used in learning. In the aspect of media feasibility with 88.75%, it categorized into very good criteria therefore it was proper to be used in learning. In individual testing was 81.25%, while small group testing was equal to 84.37% and in media feasibility aspect and content in field trial that was equal to 87.50% therefore it included in very good criterion which was proper to be used in learning process.keyword : Learning media, Chasis maintenance, validity.

Analisis Pengaruh Bentuk Slidding Roller Terhadap Torsi dan Daya Kendaraan Berbasis Continously Variable Transmission Wijaya, Dedik Ananta; Dantes, Kadek Rihendra; Pasek Nugraha, I Nyoman
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol 2, No 2 (2021): April
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v2i2.10788

This study aims to determine the ratio of power and torque on an automatic motorbike using two different rollers, namely a cylindrical roller with a sliding roller with a weight of 12 grams each. The method used in this research is the experimental method. The testing and retrieval process carried out at the Gede Widi Motor workshop, and data collection was carried out five repetitions for each variation. After testing, there are differences in torque and power on the cylinder roller with roller sliding. The cylinder roller reaches the highest torque of 7.6 Nm at Rpm 4000. The highest power is 7.46 Hp at Rpm 7000, while in roller sliding, the highest torque is 11.82 Nm at Rpm 4000 and the highest power 7.56 Hp at 7000 RPM.

Analisis Unjuk Kerja Prototype Trainer Lemari Pendingin dengan Variasi Beban Pendinginan Arifudin, Andi; Wiratmaja, I Gede; Pasek Nugraha, I Nyoman
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol 3, No 1 (2021): October
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v3i1.12225

This study aimed to find the effect of variations in cooling load on the performance of the prototype trainer refrigerator, which in this refrigerator prototype had never been tested performance. In this study, the experimental method was used. The values sought in this study were the rate of room cooling and the Coefficient of Performance (COP). In this study, the variation of the cooling load used started from temperatures of 300, 350, 400, 450 oC, with 15 repetitions, and the temperature performance used was 1000C. The study results showed that the highest room cooling rate occurred at 300 oC cooling load variation, namely 0.00265, and the smallest room cooling rate occurred at 450 oC cooling load variation, namely 0.00174. The highest Coefficient of Performance (COP) results occurred at a cooling load variation of 450 oC, namely 34.09, and the lowest Coefficient of Performance (COP) occurred at a cooling load variation of 300 oC, namely 29.60. From these results, it can be concluded that the cooling rate of the room was inversely proportional to the increase in cooling load because the more significant the cooling load, the longer the time obtained, resulting in a small room cooling rate. And for the results of the Coefficient of Performance (COP), it was directly proportional to the increase in the cooling load because the more significant the cooling load given, the higher the temperature at T1 and T2, resulting in a significant Coefficient of Performance (COP).

STUDI PELACAKAN KETERSERAPAN LULUSAN JURUSAN TEKNIK ELEKTRO FAKULTAS TEKNIK DAN KEJURUAN UNIVERSITAS PENDIDIKAN GANESHA Nugraha, I Nyoman Pasek
Jurnal Pendidikan Teknologi dan Kejuruan Vol 6, No 1 (2009): Edisi Januari 2009
Publisher : Universitas Pendidikan Ganesha

Jurusan Teknik Elektro, Fakultas Teknik dan Kejuruan (FTK)Undiksha harus berbenah diri guna memenuhi tuntutan kemajuan ilmu pengetahuan, teknologi, dan kebutuhan pasar. Salah satu bentuk mekanisme yang dapat dilakukan adalah studi pelacakan yang hingga saat ini belum pernah terlaksana bagi lulusan jurusan Teknik Elektro.Metode pengumpulan data yang digunakan adalah kuesioner.Responden penelitian ini adalah alumni Jurusan Teknik Elektro yang terpilih sebagai anggota sampel penelitian, di samping terdiri dari sejumlah tokoh kunci yang diasumsikan mewakili kalangan pemakai lulusan (selected samples).Dari 53 orang lulusan yang berhasil diamati ternyata tingkatketerserapan lulusan Jurusan Teknik Elektro sangat tinggi terutama dibidang swasta (26 orang atau 49,06%), 7 orang (13,2%) yang diketahui melakukan wiraswasta, 6 orang (11,3%) sebagai pegawai negeri sipil (PNS) dan 9 orang (16,98%) berstatus honorer , serta 5 orang (9,43%) sisanya sedang studi lanjut.Kata kunci : studi pelacakan, lulusan

STUDI PELACAKAN KETERSERAPAN LULUSAN JURUSAN TEKNIK ELEKTRO FAKULTAS TEKNIK DAN KEJURUAN UNIVERSITAS PENDIDIKAN GANESHA I Nyoman Pasek Nugraha
Jurnal Pendidikan Teknologi dan Kejuruan Vol. 6 No. 1 (2009): Edisi Januari 2009
Publisher : Universitas Pendidikan Ganesha

PENGARUH PERLAKUAN KIMIA SERAT ALAM RAMIE TERHADAP KEKUATAN TARIK SERAT TUNGGAL I Nyoman Pasek Nugraha
Jurnal Pendidikan Teknologi dan Kejuruan Vol. 8 No. 2 (2011): Edisi Juli 2011
Publisher : Universitas Pendidikan Ganesha

Proses Penelitian ini bertujuan untuk mengetahui pengaruh perlakuan kimia pada serat alam rami terhadap kekuatan tarik serat tunggal. Serat mendapat perlakuan NaOH dengan variasi konsentrasi dan waktu disusul oleh proses pembersihan dengan H2O2 dan xylene serta proses sizing menggunakan natrium silika dengan variasi konsentrasi dan waktu. Hasil penelitian menunjukkan bahwa perlakuan sizing meningkatkan kekuatan tarik serat sampai 25% dibandingkan dengan tanpa perlakuan. Kekuatan tarik serat maksimum sebesar 598 MPa didapatkan dari perlakuan 5% NaOH selama 2 jam dan dilanjutkan pembersihan dengan xylene serta perlakuan sizing 30% natrium silika selama 3 jam. Hasil penelitian ini selanjutnya digunakan sebagai acuan perlakuan awal pada serat alam rami sebagai penguat material komposit polimer. Kata kunci : serat alam rami, sizing, NaOH, H2O2, xylene, natrium silika, kekuatan tarik

MENUMBUHKAN JIWA WIRAUSAHA MAHASISWA JURUSAN TEKNIK ELEKTRONIKA MELALUI PROGRAM ENTREPRENEUR I Nyoman Pasek Nugraha
Prosiding APTEKINDO Tahun 2010
Publisher : FTK Universitas Pendidikan Ganesha

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

Kemajuan Teknologi di bidang listrik dan elektronika seiring dengan meningkatnya tuntutan masyarakat terhadap penyediaan kebutuhan sumber daya manusia (SDM) yang mampu menangani masalah yang berhubungan dengan hal tersebut. Di sisi lain, sebagian besar mahasiswa Jurusan Teknik Elektronika belum memiliki kemampuan yang memadai sebagai tenaga profesional apalagi sebagai wirausahawan yang handal. Untuk mengantisipasi tuntutan masyarakat terhadap tenaga profesional di bidang instalasi listrik, elektronika, komputer, dan mesin pendingin perlu diberi kesempatan untuk melakukan program entrepreneur guna menjawab tuntutan masyarakat. Program ini juga melatih mahasiswa jurusan Teknik Elektronika agar memperoleh pengetahuan tambahan yang terkait dengan bidang Instalasi Listrik, Elektronika, Komputer dan Mesin Pendingin, memperoleh pengalaman serta keterampilan baru, menambah kepercayaan diri dalam mencari bahkan dalammencoba menciptakan peluang kerja baru, serta memiliki jiwa kewirausahaan dalam bidang yang ditekuni sehingga tidak selalu bergantung kepada peluang yang diciptakan orang lain. Program inisekaligus melatih sejak dini mahasiswa untuk menciptakan lapangan kerja sendiri sehingga dapat membantu program pemerintah guna mengurangi penggangguran yang semakin meningkat.Kata Kunci: entrepreneur, instalasi listrik, elektronika, komputer, mesin pendingin

Analisis Kekerasan Hasil Pengelasan Gas Tungsten Arc Welding pada Baja ST 37 dengan Variasi Media Pendingin Gede Agus Widiantara; I Nyoman Pasek Nugraha; Kadek Rihendra Dantes
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol 3, No 1 (2021): October
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v3i1.12245

Cooling media is a substance that increases the hardness value of a material through a heat-treatment process. This study aims to determine the effect of cooling media on the hardness of ST 37 steel due to Gas Tungsten Arc Welding (GTAW). The independent variables, namely water cooling media, seawater cooling media, and oil cooling media, while the dependent variable is the hardness. The specimens using water cooling media, the hardness in the weld area is 47.19 kg/mm2, in the HAZ area the it is 54.6 kg/mm2, and the base metal gets a value of 40.87 kg/mm2. While the specimens with seawater cooling media get a value in the weld area of 76.37 kg/mm2, in the HAZ area it gets a value of 83.89 kg/mm2 and the base metal gets a value of 70.13 kg/mm2. The specimens with oil cooling media the value in the weld area is 40.77 kg/mm2, in the HAZ area it gets a value of 43.32 kg/mm2 and the base metal gets a value of 36.09 kg/mm2 . From the hardness values obtained, specimens immersed in seawater cooling media have the higher hardness values compared than water and oil cooling media.

Pengaruh Variasi Insulator Saluran Chilled Water Terhadap Performansi Prototype Mini Water Chiller Buddhi Satya Utama; I Nyoman Pasek Nugraha; I Gede Wiratmaja
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol 3, No 1 (2021): October
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v3i1.12264

The high heat transfer rate from the environment to the chilled water pipe will affect the performance of the mini water chiller prototype, so it is necessary to insulate the chilled water pipe using the right insulator to optimize the performance of the mini water chiller prototype. Therefore, this study aims to determine the effect of the chilled water pipe insulator variations: nitrile rubber expanded and polyurethane foam on the optimal temperature and cooling rate of the mini water chiller prototype cabin. The method used in this study is an experimental method with a variation of the insulator as independent variables and the optimal temperature also cooling rate of the mini water chiller prototype cabin as the dependent variables. The testing process was carried out 20 times repetition of data collection on each variation using a stopwatch, thermo gun, thermostat, ampere pliers, a bulb, and a water heating element as a tool in research. In addition, it expanded nitrile rubber and polyurethane foam spray as research material. The results obtained from this study showed that the average optimal temperature achievement of the mini water chiller prototype with polyurethane foam insulator was 11.242◦C, and with the nitrile rubber expanded insulator was 11.250◦C. Otherwise, the average cooling rate of the mini water chiller prototype cabin with polyurethane foam insulator variation was 0.001421◦C, while in the variation of nitrile rubber expanded it was 0.001032◦C, which indicates that there is an effect of chilled water pipe insulator variations on the performance of the mini water chiller prototype.

Co-Authors Abdi Pranata, I Gede Adisantosa, I Gede Wahyu Denata Agus Adi, I Nyoman Alfian, Handi Aprianto, Gede Aprilia, Dodik ari pradnyana, suta Ariantika, Kadek Arifudin, Andi Armika, I Putu Arnawa, I Komang Gede Arsana, Putu Baskara, Rizal Buddhi Satya Utama Budiastawan, Ngurah Putu Darma, Kadek Budi Susila Deva Supriana, Putu Dewa Gede Hendra Divayana, Dewa Gede Hendra Dewa, I Dewa Gede Darma Permana Dewangga, Sang Putu Fitrah Dewi, L.J.E. Dipa, Dewa Putu Dias Sancaya Dwipayana, Made Krisna Eka Jaya, I Gd Elisa, Edi Fajriyanto, Muhammad Noval Firdaus, Kholid Galang Kawih Gede Agus Widiantara Gede Widayana Gede Widayana Hadi Susanto Haryono, Dimastya Teguh Cipto I Gede Ari Saputra I Gede Made Aditya Tresnajaya I Gede Wiratmaja I Gusti Ngurah Sanjaya, I Gusti Ngurah I Putu Heri Yudistira Kadek Rihendra Dantes Kadir, Ach. Khalil Kayana, I Made Dwi Kayana, Made Dwi Kolo, Jaeme Martins Krisnayadi, Made Hari Luh Joni Erawati Dewi Made Agus Suardana Pinatih Mahayoga, I Kadek Alit Mohammad Zakarianto Nyoman Arya Wigraha Pradana, Putu Surya Pramesti, I Gede Yoga Prayuda, Gede Wisnu Priadi, Made Angga Putera, Ocky Primatara Putra Krisnanandha, Vidsvara Putra, A. A. Pt. Ananta Putra, Anak Agung Kade Semara Putra, I G Ngurah Kusuma Randi Wirdana, I Gede Riandika, Putu Ryan Pratama Putra, Ryan Pratama Satriadyanto, Irawan Suadnyana, Made Budi Suandika, I Komang Adi Suartama, I Putu Gede Subadra, I Nengah Suka Arimbawa, I Kadek Suryantara, Putu Agus Sutrisna, Kadek Wibawa, I Wayan Satya Widiarta, I Wayan Wijaya, Dedik Ananta Wijaya, Kadek Surya Yasa, Kadek Odi Supertama Zurweni Zurweni

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