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INDONESIA
JURNAL TEKNOLOGI TECHNOSCIENTIA
Published by Institut Teknologi Nasional Yogyakarta
ISSN : 19798415     EISSN : 27148025     DOI : https://doi.org/10.34151/technoscientia.v8i2.161
Core Subject : Science, Engineering,
Earth & Planetary Sciences Engineering
JURNAL TEKNOLOGI TECHNOSCIENTIA dengan ISSN: 1979-8415 dan E-ISSN: 2714-8025 merupakan jurnal ilmiah yang diterbitkan LPPM Institut Sains & Teknologi AKPRIND Yogyakarta sebagai wahana publikasi karya ilmiah/penelitian di bidang teknologi atau rekayasa meliputi bidang teknik kimia, teknik industri, teknik mesin, teknik elektro, teknik informatika, teknik geologi, dan teknik lingkungan, terbit dua kali setahun pada setiap bulan Februari dan Agustus. Setiap naskah yang dikirim akan dilakukan review secara tertutup. Hasil review naskah meliputi: DITOLAK atau DITERIMA DENGAN PERBAIKAN atau DITERIMA. Setiap naskah yang dinyatakan DIITERIMA dan DITERBITKAN dikenakan biaya proses dan cetak sebesar Rp. 250.000,- (di luar biaya pengiriman) dikirimkan via transfer ke: Bank Mandiri Cabang Yogyakarta No.: 137-00-1255210-1 an.: Prof. Dr. Ir. Sudarsono, M.T.
Arjuna Subject : Energi (semua kategori) - Energi (Lain-Lain)
Articles 534 Documents
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Jurnal Technoscientia Vol 9 no 1 Agustus 2016-Full Paper Technoscientia, Jurnal Teknologi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 9 No 1 Agustus 2016
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v9i1.712

Abstract

Jurnal Technoscientia Vol 9 no 1 Agustus 2016-Full Paper
SISTEM PENDUKUNG KEPUTUSAN SELEKSI KELAYAKAN PROPOSAL PENELITIAN DOSEN MENGGUNAKAN METODE TOPSIS DAN SAW Ariyana, Renna Yanwsatika
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 1 Agustus 2018
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v11i1.775

Abstract

Research proposal selection process involving lecturers at the Institute for Research and Community Service (LPPM) must be carried out proportionally and professionally in accordance with established criteria and standards for management, assessment and funding. However, there are problems faced by LPPM, namely the lack of reviewers, differences in assessment styles, the number of diverse scientific studies, and the element of subjectivity are some of the challenge factors when selecting research proposals. There needs to be a decision support system that can be used as an alternative decision making in conducting research proposal selection. In this study we used a combination of Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) and Simple Additive Weighting (SAW) methods using five assessment criteria, namely: the ability of presentation and mastery of the material, the problem under study, research method, research output, and feasibility resource. Based on the results of the study, the results of the same calculation obtained by combining the TOPSIS method and SAW using 20 data samples with the value of accuracy between manual calculation and the system reaching 100%.
Jurnal Technoscientia vol 11 no 1 Agustus 2018-Cover-Redaksi-Daftar Isi Technoscientia, Jurnal Teknologi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 1 Agustus 2018
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v11i1.802

Abstract

Jurnal Technoscientia vol 11 no 1 Agustus 2018-Cover-Redaksi-Daftar Isi
Jurnal Technoscientia vol 11 no 1 Agustus 2018-Full Paper Technoscientia, Jurnal Teknologi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 1 Agustus 2018
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v11i1.803

Abstract

Jurnal Technoscientia vol 11 no 1 Agustus 2018-Full Paper
PENGARUH KECEPATAN LAS MIG MATERIAL AA5083H116 PADA LAJU KOROSI DI LINGKUNGAN 3.5% NaCl -, Mudjijana
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 2 Februari 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v11i2.804

Abstract

Transportation equipment of product and people from one island to another using a small or large ship is cheaper than by plane. The ship can be constructed using A36 steel materials and AA5xxx aluminum alloys that are resistant to saline water. The purpose of this research is to investigate the effect of MIG welding speed of AA5083H116 on corrosion rate in a 3.5 wt% NaCl environment. AA5083H116 material of 300mm x 75mm x 3 mm was welded using a MIG Tenjima 200s equipment and using ER5356 electrode of 0.8 mm diameter, at welding speed of 8, 10, 12 mm/s, filler rate of 27 mm/s, and in argon gas environmental. The specimen of 15 mm diameter and 2 mm thick was let to be corroded including the base metal (BM), heat affected zone (HAZ), and weld metal zone. The corrosion testing was carried out at BATAN Serpong using a three-cell potensiodynamic polarization electrode. The results of Tafel plot was showed a corrosion current (icorr) and corrosion voltage (Ecorr), then corrosion rate can be determined. The corroded specimen surfaces were investigated using a scanning electron microscope (SEM) and an energy dispersive spectrometer (EDS). The results of the research show that the corrosion rate of welding speed of 12 mm/s is lower than that of welding speed of 8 mm/s. It is confirmed that the SEM showed that the deterioration of surfaces corrosion is smaller than at HAZ zone.
PENGARUH PENAMBAHAN PLASTIK POLIPROPILENA TERHADAP YIELD DAN KUALITAS MINYAK NABATI HASIL PIROLISIS BONGGOL JAGUNG YANG MENGGUNAKAN CO2 SEBAGAI GAS PEMBAWA Edgar, Justin; Supramono, Dijan
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 2 Februari 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v11i2.805

Abstract

Indonesia has potential sources for development of renewable fuels from agricultural wastes, one of which is corn cobs. Many researches have tried to convert corn cobs into a liquid fuel by pyrolysis, but the resulting bio-oil has a high oxygenate content, resulting in a low heating value. On the other hand, plastic waste has become a major problem for Indonesia, amounting to 5,4 million tons of waste per year. Around 16% of the total plastic waste is polypropylene, in which its high hydrogen/carbon ratio is an attractive hydrogen source for co-feeding with corn cobs in co-pyrolysis. Synergetic effect has been formed between the two, which has been proven to increase the yield and quality of the resulting bio-oil. Most co-pyrolysis process has been conducted with nitrogen as carrier gas. Its high price creates an economic barrier for commercial production of bio-fuel using co-pyrolysis method. It is proposed to substitute nitrogen with carbon dioxide. Beside of its low cost, carbon dioxide is known to have a heat-trapping effect, thus increasing the heat flux to particle feed during co-pyrolysis process. Three feed compositions during the process has been investigated to observe the effect of feed composition to the yield and quality of the non-polar (non-oxygenated) fraction of resulting bio-oil, which will be compared to commercial gasoline. Co-pyrolysis process was conducted in a stirred tank reactor with low heating rate of 5oC/min, maximum temperature of 500oC. Non-polar fraction of the resulting bio-oil has been characterized using GC-MS (gas chromatography-mass spectroscopy) and H-NMR (hydrogen-nuclear magnetic resonance). Bio-oil yield is lower compared to its counterpart when nitrogen is used as carrier gas, but H-NMR results shows that the non-polar fraction have a high branching index, low alkene and aromatic contents, which is potential to be used as a bio-fuel.
STUDI EKSPERIMEN PENGARUH POROSITY RATIO PADA PERFORATED TWISTED TAPE INSERT TERHADAP KARAKTERISTIK HEAT TRANSFER DAN FRICTION FACTOR PADA PENUKAR KALOR PIPA GANDA Puspitasari, Susi; Safitra, Arrad Ghani
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 2 Februari 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v11i2.806

Abstract

Heat exchanger is used device to transfer thermal energy (enthalpy) between two or more fluids at different temperatures. One type of heat exchanger is double pipe heat exchanger. Double pipe heat exchanger consists of one pipe placed concentrically in another pipe with a larger diameter. One fluid passes through the inner pipe and the other fluid passes through the outer pipe (annulus). Performance of double pipe heat exchangers can be determined based on the characteristics of heat transfer and friction factor. One effort to improve the performance of double pipe heat exchanger can by passive method which is adding perforated twisted tape in the inner pipe. Perforated twisted tape had three different porosity ratios, that is 1.88, 3.77, and 5.65% that comparison with plain twisted tape (porosity ratio 0). Fluid flowed in double pipe heat exchanger is water in liquid phase in laminar-transition flow regime. Reynolds number in annulus is made constant at 2000, while in inner pipe is 1000-5000. Temperature of water entering annulus and inner pipe is kept constant at 20ºC and 50ºC, respectively. From the experimental results it found that perforated twisted tape increased Nusselt number and friction factor values respectively 0.1-0.8% and 203-1536% higher than double pipe heat exchanger without twisted tape (plain tube). Perforated twisted tape with porosity ratio 3.77% has the best performance, that is increasing Nusselt number average of 0.31% from 28.8913 in plain tube to 28.9810 and increasing friction factor average of 366.34% from 0.6521 in plain tube to 3.0410.
KARAKTERISASI SIFAT OPTIK C-DOTS DARI KULIT LUAR SINGKONG MENGGUNAKAN TEKNIK MICROWAVE Putro, Permono Adi; Roza, Liszulfah; -, Isnaeni
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 2 Februari 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v11i2.894

Abstract

Carbon dots (C-dots) are a new type of phosphorescent nanoparticles that can be easily synthesized from natural sources or raw materials. The outer shell of cassava is the second waste obtained from cassava skin waste which is less attention to be utilized. Synthesis of C-dots from the outer shell of dried cassava has been successfully carried out with Microwave techniques. Synthesis of C-dots was carried out using water as a solvent with a variation of the concentration of precursor solutions to the microwave duration. Microwave duration causes changes in the structure and optical properties of C-dots. C-dots are characterized to study the optical properties of the UV-Vis absorbance spectrum and emission intensity in the form of emissions. The observed optical properties aim to determine the C-dots energy transition, such as surface and core energy. The core energy level becomes dominant in the transition π→π* compared to the transition of n→π* in surface energy when the C-dots concentration increases so that energy shifts. This phenomenon is known from the top of the broad C-dots emission spectrum and shifts to longer wavelengths. In addition, we suspect that the difference in C-dots emissions is caused by the molecular density and content of the preparation based on the concentration of precursor solutions and the length of microwave time.
MODEL PREDIKSI PERUBAHAN PENGGUNAAN LAHAN DENGAN PENDEKATAN SISTEM INFORMASI GEOGRAFIS DAN CELLULAR AUTOMATA MARKOV CHAIN: STUDI KASUS KABUPATEN ROKAN HULU, PROVINSI RIAU Fitriyanto, Bobby Rachmat; Helmi, Muhammad; -, Hadiyanto
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 2 Februari 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v11i2.923

Abstract

Rokan Hulu Regency, Riau Province, is one of the largest oil palm plantation centers in Indonesia. The large growth of palm oil plantations in recent years has threatened the existence of protected areas and increased deforestation rates. This study aims to (1) find out the extent of land use change in Rokan Hulu Regency in 2000-2012, (2) predict land use change in Rokan Hulu regency by 2030. This research uses Geographic Information System approach with prediction model of Cellular Automata (CA) Markov Chain. The driving factors of land use change as input of CA Markov Chain model consist of distance to road, distance to river, distance to disturbance area, distance to Plantation Forest, distance to Forest Clearance Permits and slope data. The results showed that the area of deforestation reached 60.38% from 2000 to 2012, mostly in the northeastern region of Rokan Hulu Regency. The prediction model of land use change has an accuracy of 68.15% based on the kappa index agreement (KIA). By 2030, the area of forest land in Rokan Hulu is predicted to be 3.13%
MODEL SISTEM INFORMASI MANAJEMEN KETAHANAN PANGAN (PEMANFAATAN DAN KETERSEDIAAN PANGAN) -, Zaidir; -, Erizal
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 2 Februari 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v11i2.925

Abstract

The concept of food security considers the availability of food, access to food and the use of food as the main aspects supporting food security and linking these aspects to ownership of household assets, livelihood strategies, and political, social, institutional and economic environments. In Law Number 18 of 2012 it is said that the Government and Regional Government are obliged to develop, compile and develop a food information system on aspects of food utilization and availability. The benefits of information have a significant impact on an institution or the public. Quality information can only be produced from a quality information system. Data and information are needed as a basis for policy making and decisions from planning to evaluating activities. The model development method in this study is with the stages of analysis, design and coding and model testing. The results of this study are a model of the Food Security Information System that can provide information on food security analysis with various variations. Indicators of achievement in the study are in the form of design use case diagrams, database design and interface design.

Page 34 of 54 | Total Record : 534

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