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INDONESIA
Jurnal technoscientia
Published by Institut Sains dan Teknologi AKPRIND
ISSN : 19798415     EISSN : -     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Arjuna Subject : -
Articles 16 Documents
 1   2 
Search results for , issue "Technoscientia Vol 4 No 1 Agustus 2011" : 16 Documents clear
ANALISIS PERUBAHAN VOLUME PADA CYLINDER HEAD DAN TINGGI LUBANG EXHAUST TERHADAP KENAIKAN DAYA SEPEDA MOTOR 2 LANGKAH -, Sudarsono
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (505.884 KB) | DOI: 10.34151/technoscientia.v4i1.492

Abstract

The aim of this research is to know the effect of the change of cylinder head and the height of exhaust port to obtain great and safe power. Cylinder has many ports which are used in scavenging process (proses pemasukan, pembilasan dan proses pem-buangan) Exhaust port determines compression that is occurred in two stroke engine cycle and influences the engine characters. In standard condition, revolution 1500 produced 2 Nm torque. After modification, torque decreased to 1,5Nm. New torque increased in revolution 2000 rpm with 3,1Nm. Torque reached a peak from 10,8Nm in revolution 8500rpm to 13,6Nm in revolution 10.000rpm. Power produced in standard condition was 0,4Hp in revolution 1500rpm. After modification, it decreased to 0,3Hp. New power increased in revolution 3500rpm. Power reached a peak from 12,9Hp in revolution 8500 rpm to 19Hp in revolution 10.000rpm.
PENGAMATAN KESTABILAN LERENG TAMBANG MENGGUNAKAN SLOPE STABILITY RADAR (SSR) -, Supandi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1083.31 KB) | DOI: 10.34151/technoscientia.v4i1.493

Abstract

Maintenance of the mine slope stability is very important to maintain continuity of mining activities. Although the mine design is done by carefully using several methods and approaches, but often there is a failure due to design limitations of geological information. In this case it is necessary to minimize the effects of a monitoring tool that can detect early indications of instability. In this study aims to determine the function of Slope Stability Radar (SSR) in the monitoring of slope stability is the end goal is to avoid negative impacts and risks of failure can be avoided mine design and sustainability of mining activities can proceed safely. In this study the observations using the Slope Stability Radar (SSR). Radars placed at a point perpendicular to the object in the observed and the radar will emit a wave toward the object and the object wave will be sent back and will be captured by the radar..In this study, the radar is installed in a certain position to monitor the movement of the walls of the mine and the results of research can be in the relationship between the movement of the actual conditions that exist. Monitoring the stability of the wall using the radar continues to be done at the time of stabilization and stabilization has been finished when done. Monitoring was stopped when the mine wall stabilisasi and activity near the ravine has been finished and there is no indication of movement of the slope. From this research produced the conclusion that the use of slope stability radar (SSR) are very helpful and effective for the observation of slope stability, especially to minimize the risk of mining activities.
KARAKTERISTIK MENARA PENDINGIN DENGAN BAHAN ISIAN TALI IJUK Johanes, Susanto
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (921.464 KB) | DOI: 10.34151/technoscientia.v4i1.494

Abstract

In this study the characteristics of a water cooling tower with palm fibre as the packing material have been investigated experimentally. The experiments were carried out in a rectangle glass tower of 81 cm2 cross sectional area and 100 cm height. The packing used was constructed of 8 palm-fibre ropes (of about 0,6 cm diameter), zigzag and cross of water flow, and then it placed above the stainless steel support on the tower bottom. There were two type of packing i.e. 21,7.10-4 and 28,3.10-4 kg weigh of rope every m3 volume of the packing. The experimental results show that the increasing of the water inlet temperature and packing height causes the increasing of the tower characteristic . Mean while the increasing of the water/air mass flow rate ratio causes the decreasing of the tower characteristic.The tower characteristics is as a function of the investigated variables which expressed as: NTU = 165,24.10-3 (mw/ma)-0,999 (Z)0,5343 (Twi)0,1429 . It is for 21,7.10-4 kg/m3 of the specification of the packing material, with the relative error of 6,1 %, and NTU = 3,35.10-3 (mw/ma)-0,995 (Z)0,5050 (Twi)1,1643. It is for 28,3.10-4 kg/m3 of the specification of the packing material, with the relative error of 5,5 %.These equations are valid for the range variables, they are mw/ma of 4,46 – 9,48, Z of 30 – 90 cm, Twi of 50 – 60 oC. The mean effectiveness of the heat transfer were calculated to be 24,8 % and 25,9 %, respectivally for 21,7.10-4 and 28,3.10-4 kg/m3 of the specifications of the packing material.
ANALISIS KEPUASAN PENGUNJUNG WISATA DENGAN MODEL KANO BERDASARKAN DIMENSI SERVQUAL Ramadhani, Yuliastuti; Suciandani, Praptiwi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (172.733 KB) | DOI: 10.34151/technoscientia.v4i1.500

Abstract

The aim of the study was to integrate measurement of visitor satisfaction to the service given by management of Pikatan Water Park by using Kano model for identifying proper priority forward performance improvements of each questionnaire. The total which was used to measure was questionnaire consisted of functional question and dysfunctional question that was grouped into servqual dimension (tangible, reliability, responsiveness, assurance, and empathy). The result of 58 respondents who did questionnaire, it was categorized Kano (one-dimensional, must-be, attractive, indifferent, reserve, and questionable). The result of the study according to the respondents, it is obtained that the highest point of tangible dimension, categorized “one dimensional” was 193, whereas other four categories included “must-be” are 63, 73, 127, and 83 res-pectively. According to management, however, tangible dimension categorized “one-dimensional”, to increase visitors, it is necessary to give good interest to each questionnaire and to add each reliability dimension in order to increase city budget.
Jurnal Technoscientia Vol 4 no 1Agustus 2011-Cover-Daftar isi Technoscientia, Jurnal Teknologi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (142.605 KB) | DOI: 10.34151/technoscientia.v4i1.680

Abstract

Jurnal Technoscientia Vol 4 no 1Agustus 2011-Cover-Daftar isi
Jurnal Technoscientia Vol 4 no 1Agustus 2011-Full Paper Technoscientia, Jurnal Teknologi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (8107.688 KB) | DOI: 10.34151/technoscientia.v4i1.681

Abstract

Jurnal Technoscientia Vol 4 no 1Agustus 2011-Full Paper

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