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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 17 Documents
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Search results for , issue "Technoscientia Vol 3 No 2 Februari 2011" : 17 Documents clear
PERBAIKAN FAKTOR DAYA DENGAN PENAMBAHAN NILAI KAPASITOR SEBAGAI PENGHEMAT ENERGI LISTRIK PADA BEBAN LAMPU FLUORESEN Suyanto, Muhammad
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 3 No 2 Februari 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (162.931 KB) | DOI: 10.34151/technoscientia.v3i2.480

Abstract

The use of electrical energy is made as efficient as possible, therefore to get the economical value, especially in the use of Fluorescent lamps, it is necessary to make an effort how to use energy that approach the installed value. The effort was dane by in cir-cuit tests using fluorescent lamps with different capacitor values and comparing them with economical lamps. Having obtained the capacitor values, the experiment were carried out to collect the actual data of the installed power. The resuls of the experiments were analyzed and showed that the increasing values of capasitors were followed by better power factors so they approached the associated installed powers.
KARAKTERISTIK MINERALOGI ENDAPAN NIKEL LATERIT DI DAERAH TAMBANG TENGAH (BUKIT TLA2) PT. ANTAM Tbk. UBP NIKEL POMALAA SULTRA -, Musnajam
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 3 No 2 Februari 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2324.159 KB) | DOI: 10.34151/technoscientia.v3i2.482

Abstract

This research is aimed to understand the mineralogy of nickel laterite deposit and geochemistry of ultramafic rock, the samples were taken from 14 drilling holes The data is analyzed to conduct weathering geochemical profile to identify lateritization, laterite profile development, characteristics and elements enrichment process in weathering zones. Lithology of the study area is composed by dunite and lherzolite, That dominated by livine, pyroxene and serpentine, also opaque minerals such as chromite and magneti-te with small percentage. Based on X-Ray Diffraction analysis known that the clay mine-rals are chlorite, clinochlore, kaolinite, and dyckite. Based on geochemical analyzes, the mineralogy characteristics of study area showing the different behavior for each element, due to the weathering rate and the dept of cores. The different behavior each element during weathering process determined by different element chemical mobility, forming minerals resistance, weathering intensity and jointing process.
ANALISIS FAKTOR GESEKAN PADA PIPA LURUS DENGAN VARIASI DEBIT ALIRAN Subagyo, Rachmat
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 3 No 2 Februari 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (838.155 KB) | DOI: 10.34151/technoscientia.v3i2.483

Abstract

Distribution of laminar or turbulent flow is strongly influenced by the Reynolds number, Viscosity, pressure gradient and surface roughness. High coefficient of friction affect directly to a substantial reduction in pressure and eventually to the energy needed to push the fluid. Because of the role of the coefficient of friction is very important in the flow, so study has been conducted on the straight pipe, and friction factor with the variation of flow rate, by measuring pressure at two particular points to determine the loss. From the experimental results it can be concluded that the friction factor will be smaller in value with increasing Reynolds number and with the increase of Re, the friction factor value will be more stable. In the first experiment the highest friction factor occurs at Re = 4,30 x 104 with a value of f = 2,195 x 10-2 for the second experiment at Re = 1,41 x 104 with a value of f = 2,462 x 10-2 and the third experiment at Re = 2,39 x 104 with a value of f = 2,461 x 10-2. And for the lowest value occurred at Re = 1,91 x 105 with a value of f = 1,513 x 10-2, Re = 1,86 x 105 with a value of f = 1,521 x 10-2 and Re = 1,75 x 105 with a value of f = 1,544 x 10-2. At Re numbers began to 1,50 x 104 - 2 x 104 value of the friction factor tends to be stable (unchanged). The difference calculation from the experimental to the theoretical friction factor is 1,37% and to the moody diagram is = 1,14%.
PENGARUH PENGGUNAAN SPONTAN POWER TERHADAP UNJUK KERJA MOTOR BENSIN NF 100 D -, Sudarsono
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 3 No 2 Februari 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (337.869 KB) | DOI: 10.34151/technoscientia.v3i2.485

Abstract

Vehicles that are mostly still using conventional fuels (gasoline and diesel). The fuel demand is increasing in many areas, especially for automotive so we need to save energy by increasing engine performance. This case forced to examine the effect of using and without out the spontan power to the engine performance. This study used the constant load for each test (standard engine and the spontan power) with the variation of rotation 1500, 2000, 2500, 3000, 3500 , 4000, 4500, 5000, 5500, 6000 and 6500 rpm in laboratorium. This research was also conducted in the field to know the difference in ecceleration.The test had been conducted to assess the performance of a 4-stroke motor-cycle engine of 100cc Honda supra x 2001 and the result said that using the spontan power the torque rose 17.85% to standard conditions, the average power rose 14.79 % to standard conditions, the everage effective pressure rose 17.82%, average fuel consum-ption reduced 7.112% to standard condition and the everage efficiency increase 24.303% to standard condition.
PENURUNAN KADAR SUSPENDED SOLID DAN ZAT WARNA PADA AIR LIMBAH INDUSTRI BATIK DENGAN ARANG AKTIF -, Warsiyah
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 3 No 2 Februari 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (106.635 KB) | DOI: 10.34151/technoscientia.v3i2.486

Abstract

Batik industri liquid waste contained the quite high concentrations of biodegradable and easily-rotten suspended solid and non-biodegradable dye. When no processing was conducted before it was disposed into receiving water body, such a condition would produce reduced quality of life. This research aimed to reduce the content of suspended solid and dye in liquid waste by using adsorption process through the use of active carbon media. Active carbon media-based adsorption has been one of the methods to solve pollution problem on receiving water body. Experimental method through the use of active carbon was adopted. The results of the experiment was developed into a design of waste processing instrument. The instrument was operated by setting absorbent, while the adsorbent was a pipe of 4 inch in diameter, and the surface area was 0.03243 m2. Water level was set to be 0.6 m higher than the media. Analysis variant is yused in dis research. Result indicated that active carbon was able to reduce SS and the dye. The efficiency of SS and the dye were 55.23% and 55.30%, respectively. The variant analysis showed F value at 5% significance level with 5.14 free grade of the effluent quality, and the adsorption of active carbon was better at the 70 cm thickness with maximum water height.
Jurnal Technoscientia Vol 3 no 2 Februari 2011-Cover-Daftar isi Technoscientia, Jurnal Teknologi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 3 No 2 Februari 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (95.798 KB) | DOI: 10.34151/technoscientia.v3i2.678

Abstract

Jurnal Technoscientia Vol 3 no 2 Februari 2011-Cover-Daftar isi
Jurnal Technoscientia Vol 3 no 2 Februari 2011-Full Paper Technoscientia, Jurnal Teknologi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 3 No 2 Februari 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6679.758 KB) | DOI: 10.34151/technoscientia.v3i2.679

Abstract

Jurnal Technoscientia Vol 3 no 2 Februari 2011-Full Paper

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