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Toto Rusianto
Institut Sains & Teknologi AKPRIND Yogyakarta
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Veterinary Other

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Journal : JURNAL TEKNOLOGI TECHNOSCIENTIA

 1 
THE EFFECT OF PH VARIATIONS ON MAGNETIC PROPERTIES OF MAGNETITE SYNTHESIZED FROM IRON SAND Wildan, Muhammad Waziz; Rusianto, Toto
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 7 No 2 Februari 2015
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v7i2.209

Abstract

Magnetite has been successfully synthesized from iron sand using co-precipitation method with variations of pH levels. The iron sand was obtained from South Coast of Yogyakarta. The iron sand was separated using a permanent magnetic bar to obtain the magnetic mineral, which is used as raw material. The raw material was ball milled to reduce the particle size down to ≤ 74 mm. It was then dissolved and stirred in HCl 37% at 80 oC for 3 hours. The reaction yielded a solution consisting of FeCl2 and FeCl3, which is called as a master solution. Ammonium hydroxide (NH4OH) 20% was added to the master solution to obtain Fe-oxide precipitation. The precipitation process depended on the pH of the solution, so the pH of the solution was arranged using variations of NH4OH contents. The volume ratios of the master solution and NH4OH were A (2:1), B (1:1), C (1:2) and D (1:3), they were designated as samples A, B, C and D, respectively. Those various compositions yielded solutions with various pH levels, i.e. 5, 8, 10 and 11, respectively. The black powder precipitation was immediately formed during the reaction. The powders were analyzed using XRD. The magnetic properties were measured using vibrating sample magnetometer (VSM). TEM was used to observe the particle size. From the XRD, it was found that magnetite compound was found on the solution with pH level ≥ 8. Magnetic properties test show that Ms (saturation magnetization) is 43 emu/gr found on the solution with pH level of 8. TEM images show that the smallest particle size found on the solution B with pH level of 8. Magnetic Nanoparticles (MNPs) with superparamagnetic properties can be synthesized from iron sand.
KONDUKTIVITAS TERMAL PAPAN PARTIKEL SEKAM PADI Wibowo, Hary; Muhajir, Khairul; Rusianto, Toto; Arbintarso, Ellyawan
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscentia Vol 1 No 1 Agustus 2008
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v1i1.375

Abstract

People have used rice husk as an isolator material to prevent melting block of ice by pour it to the block of ice. Rice husk as particle board have been developed as an alternative of isolator material especially for cold storage. Thermal conductivity was affected by many aspects; one of them is filler solid compression ratio. The value of thermal conductivity in the rice husk particle boards has been researched to thermal conductivity with modified of ASTM C177 method and with different solid comparison are: 6-1, 5-1, 4-1, 3-1 i.e from original thick to final thick. From the different of the value of thermal conductivity which was from every density, it was found that the highest value of the thermal conductivity was obtained on rice husk particle board with the density of 3-1 with the value of thermal conductivity 0,133 w/m°C on heat source 70 watt and 0,103 w/m°C on heat source 80 watt and the lowest value of the thermal conductivity was density with 6-1 with the value of thermal conductivity 0,096 w/m°C on heat source 70 watt and 0,082 w/m°C on heat source 80 watt.
PERUBAHAN LAJU KOROSI AKIBAT TEGANGAN DALAM DENGAN METODE C-RING Rusianto, Toto
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 2 No 1 Agustus 2009
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v2i1.423

Abstract

Stress Corrosion Craking (SCC) generally attack to metals (steel) under internal stress. Fastener could arised internal stress to material that fastened, such as plat or other material. The experiment to observed SCC could used C-Ring method as standard ASTM G38-01(2007). Fastener and base material that made C-ring corroded in sea water with various stresses that was arrised by fastener. The result of research showed that hardness of spesimen (fastener and C-ring) was increase with increase in stress, the hardness indicated there were internal stress in spesimen. Corrosion rate for spesimen was increase with increase in stress, the higher corrosion rate at spesimen of C-ring for arrised stress 256 kg was 24,20 MPY. and lower arrised stress 69 kg was 19,14 MPY. The spesimen of fastener for arrised stress 256 kg was 7,97 MPY. and lower arrised stress 69 kg was 6,89 MPY. Duration experiment time were 9 day.
PERANCANGAN BLADE AIRFOIL DENGAN BANTUAN PROGRAM TRANSFORMASI JOUKOWSKY Rusianto, Toto; Setyaningsih, Emy
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 7 No 1 Agustus 2014
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v7i1.617

Abstract

Design cross section of wind turbine blades with airfoil cross-section can be made from a mathematical approach. The mathematical formula was discussed for airfoil shape from Joukowsky equation, that was developed by Nikolai Zhukovsky Egorovich. The problems would appear if used the Joukowsky equation settlement for design with manual, it could take a long time. The problem solving for the mathematical could use graphic user interfaces (GUI) program and the design for implementation could use computer aided design (CAD) program. The Joukowsky transformation was performed by conformal mapping through the transformation of a complex function from one coordinate system to another, which circle shape was transformed to airfoil shape. Ideal airfoil shape was obtained with observed of the transformation radius and center of the circle.
STUDI PENGARUH PENAMBAHAN AL2O3 DAN SUHU SINTER TERHADAP KEKERASAN DAN BERAT JENIS RELATIF PADA ALUMINIUM SERBUK( AL MMC) Rusianto, Toto
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 10 Edisi Khusus September 2005
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v0i0.1911

Abstract

Powder metallurgy is known as a method to produce aluminum metal matrix composites. The materials used in this research were Al alloy powder as the matrix and Al2O3 powder as the reinforcement. The Al alloy powder with irregular shape and particle size of 53 – 210 mm was produced by mechanical grinding method. Al2O3 powder with particle size 63 – 200 mm was supplied by Merck Germany. The various content of reinforcement were 0, 3, 6 and 9% weight of Al2O3. Each composition was compacted at pressures 500 MPa to produced green bodies. The green bodies were then sintered various temperatures were 450, 500, 550 and 600 oC for 2 hour in argon atmosphere. Density of specimens was measured using Archimedes method. Mechanical properties of the specimens used Vickers hardness. The results of the research show that relative density, increases with increasing temperature sintered. However relative density decreases with increasing of Al2O3 content. The optimum mechanical properties Vickers hardness were achieved on the composites containing 6% weight of Al2O3 with compacting pressure of 500 MPa and sintered temperature 550 oC. The investigation of micro structure showed amounts of porous was 9 to 20 percent, that relative density still low was 80 to 91 percent.
PENGARUH JUMLAH BLADE SUDU DATAR TERHADAP UNJUK KERJA KINCIR ANGIN Wibowo, Hary; Rusianto, Toto; Afrilsyah, Rony
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 11 Edisi Khusus Oktober 2006
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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

Abstract

Wind is one of some alternate energy resources in the nature that used to membantu and easily human activity. The aim of this research known the performance of wind mill. The variable in the research with various number of blade 2,3, and 4. Wind mill for the research had spesification flate blade with 200 from wind direction.The speed of wind and revolution of shaft was measured for calculated power output and teoritical, coefficient performance, efficiency, and torque. Wind turbin tested in Depok resort, Parangtritis - Bantul Yogyakarta.The result of research showed the number two blade had higher revolution (121,7 rpm) than three blade (102,35 rpm) and four blade (116 rpm).The wind velocity increased to cause increase revolution of shaft. Maximum Power and Torque reached on wind turbin with three blade.
Co-Authors A. Rusyda, Annisa Rizka Adi Purwanto Adi Purwanto Afrilsyah, Rony Agus Duniawan, Agus Amir Hamzah Andrean Emaputra Angger Bagus Prasetiyo Arbintarso, Ellyawan Setyo Arbintarso, Ellyawan Setyo Argaditia Mawadati Arie Pohandry Aulia Rahmawati, Aulia Ayuhikmatin Sekarjati, Kartinasari Bambang Wahyu Sidarta Catur Iswahyudi Dullah, Mohammad Dwi Sutanto Edhy Sutanta (Jurusan Teknik Informatika IST AKPRIND Yogyakarta) Eko Darmanto Ema Utami Emy Setyaningsih Fadjeri, Akhmad Gatot Santoso Hadi Saputra Hariyanto, Satriawan Dini Hary Wibowo Hary Wibowo, Hary Imam Sodikin Joko Susetyo Kamsul Abraha Khairul Muhajir Kusmono Lilik Dwi Setyana Luh Putu Ratna Sundari M. Waziz Wildan Manarul Ikhsan MUHAMMAD SHOLEH Murni Yuniwati, Murni Nopias, Bonyfasius Nugroho, Rahmat Joko Purnawan Purnawan Purnawan Putu Susatriawan, Anak Agung Rahayu, Suparmi Setyowati Recki Aosoby Risdianto Hermawan Risma Adelina Simanjuntak Rizka A. Rusyda, Annisa Saiful Huda Saiful Huda Samuel Kristiyana Sekar Putu Waringin, Viajeng Setyowati Rahayu, Suparni Sidik, Khalil Slamet Hani, Slamet Sudarsono - Sudarsono - Suparni Setyowati Rahayu Susastriawan, A.A.P. Suwanto Raharjo Taufik Hidayat Taufik Ridho, Dimas Triadia, Tan Trikusuma, Septian Wahid, Rindo Maulana Wijaya, Dwi Anggra Wisnu Yudha Santika Yogi Suryadi Zuhdi, Rasyid