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All Journal Jurnal Teknik Industri Rotasi Jurnal Simetris Gaung Informatika Jurnal Teknosains Jurnal technoscientia Jurnal Teknologi Jurnal Script Jurnal Jarkom KURVA S JURNAL MAHASISWA Rekayasa Mesin Jurnal Pertanian Terpadu Briliant: Jurnal Riset dan Konseptual Jurnal Irigasi JMM (Jurnal Masyarakat Mandiri) Technomedia Journal JURNAL EDUCATION AND DEVELOPMENT Martabe : Jurnal Pengabdian Kepada Masyarakat Jurnal Penelitian dan Pengabdian Kepada Masyarakat UNSIQ Arthavidya Jurnal Ilmiah Ekonomi Buletin LOUPE (Laporan Umum Penelitian) Kepariwisataan: Jurnal Ilmiah MEANS (Media Informasi Analisa dan Sistem) JURNAL TEKNOLOGI TECHNOSCIENTIA JPM: JURNAL PENGABDIAN MASYARAKAT Journal of Vocational Education and Automotive Technology Metta : Jurnal Ilmu Multidisiplin Jurnal Ilmu Ekonomi Manajemen dan Akuntansi Jurnal PADAMU NEGERI (Pengabdian pada Masyarakat Bidang Eksakta) Journal of Management and Digital Business Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri Prosiding Seminar Nasional Teknologi Informasi dan Bisnis Prosiding Seminar Nasional Universitas Ma Chung PIKAT International Journal of Multidisciplinary Approach Research and Science LOGIC : Jurnal Ilmu Komputer dan Pendidikan Jurnal Riset Sistem dan Teknologi Informasi
Joko Triyono
UNTAG Samarinda
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Journal : Rotasi

 1 
Studi Eksperimental Pengaturan Waktu Pengapian Pada Mesin 4 Langkah 1 Silinder Berbahan Bakar E25 Aji, Arjuna; Triyono, Joko
ROTASI Vol 19, No 3 (2017): VOLUME 19, NOMOR 3, JULI 2017
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (365.275 KB) | DOI: 10.14710/rotasi.19.3.165-171

Abstract

The use of ethanol as a mixture of premium is for reducing dependency to the primuim, considering that premium is not renewable. The goal of the ethanol addition in a fuel is to increase the octane number. However the heating value of the ethanol is lower than premium, so it will decrease the performance of the SI engine. The study aimed for increasing the performance of SI engine using E25 as mixture of premium-ethanol. The performance of engine was measured by engine test bed on chassis. Change load method is used in the experiment. The experiments result is advancing the time of ignition at 4 degree that can improve the engine performance. The result of changes load use E25 fuel with advanced time of ignition at 4 degree can increase engine performance as torque, power, bmep, efficiency thermal and bsfc were decrease
Karakterisasi Material Biokomposit Bovine Hidroksapatit (BHA)/Shellac dan Kitosan Sebagai Material Bone Filler Rasid, Junaidi; Triyono, Joko; Triyono, Teguh
ROTASI Vol 19, No 2 (2017): VOLUME 19, NOMOR 2, APRIL 2017
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (337.679 KB) | DOI: 10.14710/rotasi.19.2.82-87

Abstract

Development of composite materials is growing rapidly to support medical needs. Biocomposite was made from bovine bone powder/shellac/chitosan for bone filler applications. Biocomposite of BHA(Bovine Hydroxyapatite)/shellac/chitosan was derived of bovine bone powder coated with shellac 10 ml. Mixed variation between BHA/shellac and chitosan i.e 30:40, 40:60, 50:50, 60:40, 70:30 %wt  were synthesized by dry method. Samples of BHA/shellac/chitosan were compacted with the pressure 60 bar until becomes solid with the cylinder mold 13 mm and 8 mm in thickness, the calcination process on temperature of  900ºC for 2 hours and increased temperature is 10ºC/min. Test XRD (X-Ray Diffraction), Microvickers, DTS (Diametric Tensile Strength) and SEM (Scanning Electron Microschopy), Density, and Porosity. XRD test results showed that bovine powder has become BHA (Bovine Hydroxyapatite), microvickers test of sample BHA/shellac/chitosan for maximum was 7.47 ± 0.685 VHN and 0.182 ± 3.73 VHN for minimum, DTS test of sample BHA/shellac/chitosan maximum at 36.66 ± 9.01 KPa and minimum at 13.90 ± 1.24 KPa. Porous observations with SEM toward sample BHA/shellac/chitosan porous size and number of samples contained at BHA/shellac/chitosan is 70:30 wt%. Density test with  highest value was 1,168gr/cm3, and lowest 1,070 gr/cm3. Highest porosity value at variation 50/50 %wt = 0,988%, and the lowest at 70/30 %wt = 0,977%
KARAKTERISASI DAN LAJU BIODEGRADASI MATERIAL BIOKOMPOSIT BOVINE HIDROKSIAPATIT (BHA)/AMPAS KOPI/SHELLAC SEBAGAI MATERIAL PENGISI TULANG Triyono, Joko
ROTASI Vol 22, No 2 (2020): VOLUME 22, NOMOR 2, APRIL 2020
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.22.2.111-118

Abstract

Angka kejadian patah tulang di Indonesia cukup tinggi sehingga perlu biomaterial di bidang kesehatan yang ekonomis dan ramah lingkungan. Tulang sapi adalah salah satu jenis biomaterial yang dapat digunakan untuk mencangkok, memperbaiki, mengisi dan mengganti jaringan tulang. Tujuan  penelitian ini adalah melakukan karakterisasi material biokomposit hidroksiapatit dari tulang sapi (bovine hydroxyapatite = BHA) dengan ampas kopi dan shellac. Ampas kopi dipilih sebagai material pembentuk porositas. Ampas kopi akan menguap dan membentuk lubang porus ketika dipanaskan hingga suhu 900oC. Shellac digunakan sebagai pengikat antar partikel BHA. Dilakukan proses  kalsinasi dan sintering untuk mendapatkan biokomposit ini. Berdasarkan pengamatan SEM-EDX menunjukkan adanya unsur anorganik Ca dan P dengan intensitas tinggi sedangkan unsur Na, Mg, O dan C dengan intensitas rendah. Pengamatan pola difraksi XRD menunjukkan nilai 2θ sesuai dengan pola difraksi standar HA JCPDS 9-432. Analisis gugus fungsi FTIR tidak menunjukkan titik puncak utama selain gugus fungsi fosfat PO43-, karbonat CO32- dan hidroksil (OH-). Dapat dinyatakan bahwa kandungan kopi dan shellac telah menghilang sepenuhnya ketika proses sintering dan hanya menyisakan kandungan BHA. Semakin banyak campuran ampas kopi yang digunakan akan menurunkan nilai densitas dan meningkatkan jumlah porus serta mempercepat laju biodegradasi material.
Co-Authors -, Cahyana -, Nurhatin Abdulloh, Yusuf Abram Anugrahta Sitepu, Elroy Abreu Andre Boavida Adi Kurniawan Agnesie Pratiwi Masero Aji, Arjuna Andi Tenri Sumpala, Andi Tenri Arief Rahman Arifat, Jefri Nur Arini Rajab Aziza, Humairo Azwari, Fachruddin Bambang Wahyu Santoso, Bambang Wahyu Basuki, Untung Joko Benedicta, Christine Elia Burhan, Nurul Cahyono, Nova Tri Cahyono, Nova Tri Catur Iswahyudi Damiasih Dhidik Apriyanto Dina Andayati Dwi Agus Kristianto Dwi Budi Santoso Dwi Setyowati Edhy Sutanta (Jurusan Teknik Informatika IST AKPRIND Yogyakarta) Eka, Agus Elyta Elyta Erfanti Fatkhiyah Erna Kumalasari Erna Kumalasari Nurnawati Ernanda, Ervan Ernani Hadiyati Faesol Puspito Fahmi Dhimas Irnawan Fuad Abdillah Gunawan Arifin Guridno Adi Saputro Hadidjah, Kemala Hardianto Nugroho Hari Wibowo Harmastuti, Harmastuti Haryan, Prita Heru Sukanto Hidayah, Wardatul Imaduddin, Fitrian Isra, Nur Iswayudi, Catur ivan Joi Pramana Jamhari Jamhari Kristiawan, Yulius Orland Laksono Trisnantoro Lambang G H, Raymundus Lullus Layuk, Christopaul P Toding Lilia Ervina Jeronimo Guterres Lilia Ervina Jeronimo Guterres, Lilia Ervina Jeronimo Lutfie, Ratu Zahira Luthfia Wilaksono, Nurina Ivana Ma'ruf, Shalehudin Denny Marini Marsadualan, Agus Martha Ekawati Siahaya MUHAMMAD SHOLEH Naniek Widyastuti Naniek Widyastutui Ngapiyatun, Sri Niswatun Hasanah Nugroho, Agung Yuliyanto Nugroho, Dwi Yoso Nugroho, Fransiskus Bima Widi Nurfauzy, Fikri Sidiq Afif Nurhabibah, Siti Kirma P.Aji, Galih Tegar Padmanaba, Aditya Pangaribowo, Estu Prasetiya, Hoga Prasojo, Yudin Joko Prastika, Dika Priska Pratama, Nanda Adi Pringgo Widyo Laksono Prita Haryani Pudjianto, S.Y. Pujiyanto, Eko purwadi joko widodo Putri, Sela Angela Rachmawati K, Rr. Yuliana Rahardjo, Wijang Wisnu Rahma, Nuzula Elfa Rahmandani, Dadan Rasid, Junaidi Retno Wulan Damayanti Romansyah, Dede Rr. Yuliana Rachmawati k, Rr. Yuliana Rachmawati Rr. Yuliana Rachmawati, Rr. Yuliana Rr.Yuliana Rachmawati, Rr.Yuliana Sari, Indah Permata Sari1 Setiadi, Haryono Sikwan, Agus Singgih Dwi Prasetyo Siregar, Juarni Siringo, Tulus Gover Sitepu, Elroy Abram Anugrahta Sri Hadiati Sri Maryati Sudiro, Syawal Sulistiono, Andi Supriadi, Adi Suwanto Raharjo Taufiq Rinda Alkas Tefa, Robertus Teurupun1, Rizal Ubaidillah Ubaidillah Uning Lestari Untoro Hadi Suharto Utami, Dea Pawestry Wahyuni, Rusli Wartomo, Wartomo Wibowo, Mochamad Gilang Hari Wiwik Handayani Wulandari, Diepa Febriana Yuki Syambudi Setiadi Yuliana Rachmawati K Yustita, Wahyu Zainal Arifin