cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
bernadeta subandini astuti
Contact Email
bernadeta.palguno@gmail.com
Phone
+62274-544504
Journal Mail Official
technoscientia@akprind.ac.id
Editorial Address
Jl. Bimasakti No. 3, Pengok, Yogyakarta
Location
Kab. sleman,
Daerah istimewa yogyakarta
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
 1   2   3   4   5 
SISTEM TELEMETRI TINGKAT KONSENTRASI GAS CO2 SEBAGAI PENANGANAN DAMPAK GLOBAL WARMING BERBASIS MIKROKONROLER DENGAN INFORMASI SMS GATEWAY Hadi Prasetyo Suseno; Muhammad Andang Novianta; Catur Iswahyudi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 10 No 1 Agustus 2017
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v10i1.89

Abstract

The average temperature of global warming on the earth's surface today has increased by 0.74 ± 0:18°C, the increase was due to the increase in the average temperature of the atmosphere, ocean and land earth. Emissions of the most influential on the quality of the air is carbon emissions, especially carbon dioxide (CO2). The CO2 contributes to global warming is 50%. The CO2 gases absorb and reflect radiation emitted waves of the earth, so that the heat will be stored on the surface of the earth. This study aimed to design a data logger system monitoring the level of concentration of CO2 using the oxygen sensor (OOM202), carbon dioxide sensor (MG81), as well as temperature and humidity sensors (DHT22) with microcontroller-based SMS gateway information. The study tested are simulated in the laboratory with electronic testing and testing communication systems. The test results showed good performance with the prototype, the results of monitoring CO2 emissions seen huge levels of carbon dioxide (ppm) is proportional to the output voltage (Vout) is generated. The greater the concentration levels of gas detected by the sensor, the output voltage generated will be greater, than that difference or distinction ADC output between the measured and calculated because of several errors, such as error output ADC ± 2 bits, error rounding conversion of ADC to volt. The measurement results are different, in the closed and open area refers to the measurement parameters are displayed on an alphanumeric display. Measuring system can transmit data via SMS information system with an average response time of less than 1 minute, it depends on the quality of the signal and traffic data from a provider by the user.
ENKRIPSI CITRA DIGITAL MENGGUNAKAN KOMBINASI ALGORITME HILL CIPHER DAN CHAOS MAP DENGAN PENERAPAN TEKNIK SELEKTIF PADA BIT MSB Devi Ratnasari; Hajar Puji Sejati
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 10 No 1 Agustus 2017
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v10i1.90

Abstract

This paper represents a digital image encryption algorithm using a combination of hill cipher and chaos map algorithms. The hill cipher algorithm is one of the coding techniques by applying a square matrix as an encryption key. In this paper, the key matrix used is a 3x3 invertible matrix. While chaos map technique chosen is Logistic Map technique as a random number generator that will be used as keystream. Application of selective encryption techniques to MSB bits (Most Significant Bit) is also used to reduce computing by only performing operations on four major bits of each RGB pixel (Red, Green and Blue). To encrypt, an image is first mapped based on RGB color components (Red, Green and Blue) and then encrypted using a hill cipher key matrix. The encryption result on each RGB channel is then selected four bits MSB from each pixel and then XOR with keystream as a result from Logistic Map. Experimental results performed on multiple color images show that the image can be succesfully encrypted. It can be seen from the resulting histogram is flat on each RGB channel of the encrypted image, the average value of entropy is 7.99 and the correlation value is close to 0.
ANALISIS STABILITAS DAN PEMILIHAN PERKUATAN LERENG PADA RUAS JALAN PEMUDA KM. 3 KABUPATEN KOLAKA PROVINSI SULAWESI TENGGARA Isramyano Yatjong; Fachryano -
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 10 No 2 Februari 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.v10i2.91

Abstract

Slope conditions have been excavated due to widening of the road from the toe to the top of the slope. High rainfall instensity causes erosion along the slope surface and circular landslide on the slope. Geotechnical investigation was conducted to obtain data of physical and mechanical properties of soil in landslide area. Slope geometry excavated based on field conditions.Slope stability is based on a safety factor of 1,3 using the Bishop limit equilibrium method via Sldie v.06 and finite element method through Phase2 v.08 software and provides slope reinforcement method.The result of slope stability analysis using Slide v.06 is the value of critical safety factor equal to 1,009 with the landslide area of the first bench and the second bench. While the results of the analysis using the Phase2 v.08 is the value of critical safety factor equal to 0,980 with the landslide area of the first bench and the second bench. Both critical safety factors indicate unstable before to slope reinforcement that is still below the permit SF of 1,30 so that reinforcement is required stone retaining wall, pipe installation on slope face, make a water trench, planting and maintain vegetation at the top of the slope.
PENURUNAN BOD PADA BIOGAS KOTORAN SAPI CAMPURAN LIMBAH CAIR RUMAH POTONG HEWAN (RPH) DENGAN VARIASI KECEPATAN DAN LAMA PENGADUKAN Rosiana Indrawati
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 10 No 2 Februari 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.v10i2.92

Abstract

The scarcity of energy sources, especially fuel oil (BBM) has become a world problem. The abundant cattle dung in the community has not been optimally utilized. In addition, the slaughterhouse (RPH) wastewater has not been optimally utilized. The aim of this research is to know the effect of speed and duration of stirring to biogas volume and final BOD concentration on cow dung biogas mixture the slaughterhouse (RPH) wastewater. The experiment used biodigester reactor as much as 5 pieces, 1 as the controller without stirring and 4 others as the test digester with stirring. RPH0 as a control digester without stirring. Variation of stirring speed 5 and 10 rpm and stirring time 10 and 15 minutes. The volume of biogas is measured for 20 days. BOD levels are measured on the last day of the fermentation process. The experiment showed that the highest biogas volume was found on PK10L10 test digester that was mixture of cow dung and the slaughterhouse (RPH) wastewater with variation of 10 rpm and duration of stirring 15 minutes ie 1,331 m3, and the lowest biogas volume was 0,243 m3 in RPH0 digester. The highest decrease in BOD content was 37% in RK10L15 digester and the lowest decrease RK5L15 digester was 12%. The stirring process has a significant effect on biogas production and decrease of BOD concentration in the digester.
PENGOLAHAN LIMBAH RUMAH TANGGA DENGAN MENGGUNAKAN BUFFLED UP-FLOW REACTOR Wuryani Artiningsih; Rita Dewi Triastianti
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 10 No 2 Februari 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.v10i2.93

Abstract

Environmental problems occur because the act of a human hand which then cause disturbance to the environment. Household or domestic activities such as can be and has been shown to cause a decline in water quality. With increasing liquid waste disposal, pollution is increasing so that pollute the environment. Therefore, the authors wish to conduct research of domestic waste water with the aim to reduce levels of phosphate, nitrite and detergent. In domestic wastewater/sewage household, the authors chose to use anaerobic processing using buffled up-flow reactor were made ​​using glass with a length of 100cm, width 25 cm and height 30 cm. The results obtained for the effluent phosphate levels for 0.3502 mg/L on the second replay (the second day), nitrite by 0.1206 mg/L on the second replay (the second day) and detergent was 0.2799 mg/L in the first repeat (on the first day) in terms of the processing of the buffled up-flow reactor capable of lowering the levels of phosphate, nitrite and detergent in water and wastewater. Removal efficiency obtained from the results of wastewater treatment with bufffled up-flow reactor for phosphate content of 47.3%,-13.30% and detergents nitrite 57.8%.
PENGARUH VARIASI KONSENTRASI LIMBAH TERHADAP PENURUNAN KANDUNGAN TEMBAGA PADA PENGOLAHAN LIMBAH CAIR PROSES ETCHING DENGAN METODE ELEKTROLISIS Fifin Hindarti
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 10 No 2 Februari 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.v10i2.94

Abstract

The waste water of copper board etching process in Printed Circuit Board (PCB) production is kind of heavy metal waste water, that is copper, which has not been treated yet. In order to prevent the environment contamination process the waste water should be treated before thrown to environment. The kind of waste water treatment that will be applied to the waste water with heavy metal content, specially copper metal (Cu) is electrolysis method. The experiment was done in laboratory scale. The batch electrolysis reactor was used in this experiment, with the copper as katoda and stainless steel as anoda. Electrolysis process was conducted with waste concentration variation that was equal to 124,16; 110,96 ; and 35,84 ppm. The result of the experiment shows that, the electrolysis methode could reduce copper concentration in the waste water of etching process. The biggest efficiency degradation for the variation of waste concentration was happened at waste concentration 35,84 ppm, that was equal to 100%, with end result equal to 0 ppm. Waste concentration equal to 124,16 of ppm its result 96,24 ppm, and for concentration 110,96 ppm was got by result 0,35 ppm.
POLA SEBARAN BATUBARA FORMASI NANGGULAN KABUPATEN KULONPROGO DAERAH ISTIMEWA YOGYAKARTA Nur Widi Astanto Agus Tri Heriyadi; Dina Tania
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 10 No 2 Februari 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.v10i2.95

Abstract

Coal is one of the energy resources still become the primary needs of strategic energy for sustaining national energy in Indonesia. This study discusses coal existence in Nanggulan Formation at Yogyakarta area. Coal distribution pattern in Nanggulan Formation can provide the geometry conception base on the geological research in Watupuru area encountered three coal outcrop (OC_1, OC_2, and OC_3) stratigraphically is at the bottom layer.Coal distribution in the research area influenced by the pattern of anticline structure which has the position of the wing of East and West with the relative anticline axis of north-south direction. Reconstruction results show there is two-seam of coal, for the first seam layer have 0,55 meters thickness and for the second seam layer have 20,57 meters thickness. Seam 1 of reconstructed surface data has spread on the East side of the anticline. Seam 2 stratigraphically under seam 1 of the reconstruction results indicate that the spread is close to the anticline axis and spreads on the east side of the anticline with a 26o slope and the western wing side of the anticline with a slope 10o.
MATURITY LEVEL DOMAIN PLANNING AND ORGANIZING DENGAN COBIT 4.1 PADA PT DINAMIKA PUTRA Yogiek Indra Kurniawan
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 10 No 2 Februari 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.v10i2.96

Abstract

Information Technology (IT) Governance plays a role in corporate governance in whole aspect. Organized IT management will have a significant impact on business processes and the viability of a company. In managing IT governance, there are many frameworks can be used, one of which is CobIT version 4.1 which is a comprehensive framework and guideline for IT management. In CobIT version 4.1 contains some assessments that can be done, one of which is the assessment of maturity level that serves to see the condition of a company in the field of IT at the present time and hope in the future. This research was conducted to measure the maturity level of a company, namely PT Dinamika Putra, an IT consultant company in Surakarta city in Planning and Organizing (PO) domain with CobIT version 4.1. From the results of the assessment, the maturity level of the Planning and Organizing (PO) domain in PT Dinamika Putra currently reaches 3.21, ie at the defined process level, whereas the future expected by the company is reaching 4.16, ie at managed and measurable level. This shows the gap between present and future conditions, so strategic steps are needed to cut the gap between current conditions and expected conditions in the future.
Jurnal Technoscientia vol 10 no 1 Agustus 2017-Cover-Redaksi-Daftar Isi Jurnal Teknologi Technoscientia
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 10 No 1 Agustus 2017
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v10i1.97

Abstract

Jurnal Technoscientia vol 10 no 1 Agustus 2017-Cover-Redaksi-Daftar Isi
FABRICATION, MECHANICAL PROPERTIES, AND INTERFACE STRUCTURE OF RAMIE FIBER COMPOSITE Sudarsono -
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 10 No 2 Februari 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.v10i2.98

Abstract

In present work, ramie fiber based composites are fabricated and tested on its mechanical properties and interface structure. The work aims to investigate effect of volume fraction of ramie fiber (VoF) on mechanical properties (yield and tensile strength, bending stress and strain, and modulus elasticity) of the composites. Besides, bonding and mixing between ramie fiber and resin are also observed under interface structure test. The VoF observed are 25, 35, 45, and 55%. The results indicate that maximum yields strength of 8.03 kgf/mm2 and tensile strength of 12.29 kgf/mm2 are obtained in the composite with VoF of 45%. Meanwhile, bending stress of 121.78 MPa and bending stress of 3.25% are observed in the composite with VoF of 55%. Although good bending between ramie and resin are occurred, but non-uniform mixing between the two is observed due to fabrication method used.

Page 3 of 54 | Total Record : 534

 1   2   3   4   5 

Filter by Year

2004 2024


Reset
Filter By Issues
All Issue Technoscientia Vol 17 No 1 September 2024 Technoscientia Vol 16 No 2 Maret 2024 Technoscientia Vol 16 No 1 September 2023 Technoscientia Vol 15 No 2 Maret 2023 Technoscientia Vol 15 No 1 September 2022 Technoscientia Vol 14 No 2 Maret 2022 Technoscientia Vol 14 No 1 Agustus 2021 Technoscientia Vol 13 No 2 Februari 2021 Technoscientia-Vol 13 No 1-Agustus 2020 Technoscientia Vol 12 No 2 Februari 2020 Technoscientia Vol 12 No 1 Agustus 2019 Technoscientia Vol 11 No 2 Februari 2019 Technoscientia Vol 11 No 1 Agustus 2018 Technoscientia Vol 10 No 2 Februari 2018 Technoscientia Vol 10 No 1 Agustus 2017 Technoscientia Vol 9 No 2 Februari 2017 Technoscientia Vol 9 No 1 Agustus 2016 Technoscientia Vol 8 No 2 Februari 2016 Technoscientia Vol 8 No 1 Agustus 2015 Technoscientia Vol 7 No 2 Februari 2015 Technoscientia Vol 7 No 1 Agustus 2014 Technoscientia Vol 6 No 2 Februari 2014 Technoscientia Vol 6 No 1 Agustus 2013 Technoscientia Vol 5 No 2 Februari 2013 Technoscientia Vol 5 No 1 Agustus 2012 Technoscientia Vol 4 No 2 Februari 2012 Technoscientia Vol 4 No 1 Agustus 2011 Technoscientia Vol 3 No 2 Februari 2011 Technoscientia Vol 3 No 1 Agustus 2010 Technoscientia Vol 2 No 2 Februari 2010 Technoscientia Vol 2 No 1 Agustus 2009 Technoscentia Vol 1 No 2 Februari 2009 Academia Ista Vol 12 No 02 Februari 2008 Technoscentia Vol 1 No 1 Agustus 2008 Academia Ista Vol 12 No 01 Agustus 2007 Academia Ista Vol 11 Edisi Khusus Oktober 2006 Academia Ista Vol 10 Edisi Khusus September 2005 Academia Ista Vol 9 Edisi Khusus Oktober 2004 More Issue