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ANALISIS PERBAIKAN SISTEM PENTANAHAN PADA KAKI MENARA SALURAN TRANSMISI TEGANGAN TINGGI 150 KV BANTUL-SEMANU JOGJAKARTA Suyanto, Muhammad
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 01 Agustus 2007
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The research was carried out to get information about the improvement of gro-unding resistant value in tower feet of-high-voltage network, 150 kV, along tower trans-mission in power station, Bantul, Semanu. A good grounding system is used to flow cur-rent into the ground and prevent the current flow into the electrical equipment if electrical fault occurs. The result of measurement has shown that ground, type grumosol has a low grounding resistant value <10 Î© because its ground texture of clay has high ability to absorb and keep water and has very tiny particles and colloid property. The grounding resistant values of type regusol, litusol, brown latosol and red mediteran are above 20 Î© because of their ground texture, sand and clay. Chemical and physical reaction will take places in soil with clay structure. Its colloid property can tie/hold ion or water and sometimes free salt. The aim of this research is to get information about resistant value of soil type with almost â‰¤ 5 Î© by installing grounding electrode made from four galvanis steel coated with bronze with 15 mm in diameter, 10 meter long and two ground rods are parallel connected with 2 m each electrode and use counterpoise grounding system model. The result of the improvement is expected to meet standard requirement, SPLN almost â‰¤ 5 Î©.

EVALUASI KUALITAS DAN KETERSEDIAAN AIR PULAU KARIMUNJAWA-KEMUJAN KEPULAUAN KARIMUNJAWA, KABUPATEN JEPARA Hartanto, Priyo; S, I. Hadi
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 01 Agustus 2007
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Karimunjawa islands became an important area since it decided as a part of Karimunjawa National Park area so that become an area of tourism on the base sea resources. From morphogenetic point of view, Karimunjawa-Kemujan Islands is an petabah type islands, which is characterized by the wide about 20,8 km2 and 11,4 km2, and it can be classified as a small islands. Lithologically, these islands consists of sandstone, sandstone interbaded, clay, metamorphic and granitic rocks. The avarage of annual rain up to 3120 mm with total of rain days for a year is 114 days, so that water resources Island in Karimunjawa-Kemujan are very limited. Shallow groundwater zone with limited potensial and locally distributed in plain morphology can be get at less then 10 meters in depth. In general, the water quality in Karimunjawa-Kemujan islands still good as the standard of drinking water. From this research, the groundwater in Karimunjawa island can be grouped to 3 zones which it based on Electrical Conductivity values that are: (a) zone of 1054-2250 mS/cm, (b) zone of 100-1000mS/cm and zone of 57-59,6 mS/cm. In the other, EC value of water in Kamujan island generally is less than 100 mS/cm.

ANALISIS PEMBERIAN INSENTIF KERJA BERDASARKAN FISIOLOGI KERJA DITINJAU DARI ASPEK ERGONOMI Simanjuntak, Risma A.; Maedi, Mukhamad
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 01 Agustus 2007
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Metal found company, CV Gunung Mas is company which move in heavy indus-try field. The products are drinking water pipe, gas pippe, oil pipe, etc appropriate with the order. The heart beat measuring only form measuring of energy consumtion indirectly. The more energy consumption requirement for work activities (heacy work) the more e-nergy consumed. In work physiology, 4 Kkal/menit will be considered as consumed ener-gy maximum to do heavy physic work continually. From the result of consumed energy analysis and extra wage for employees of CV. Gunung Mas in every work activity is furnace activity consume average 4,9419 Kkal/ minutes, they get extra wage in the amount of Rp 9.500 ; process of printing activity consume average energy 4,6917 Kkal/minutes, they get extra wage in the amount of Rp 5.250; grinding activity consume average energy 4,3188 Kkal/minutes, they get extra wa-ge in the amount of Rp 2.800; drilling activity consume average energy 4,2075 Kkal/mi-nutes, they get extra wage in the amount of Rp 1.750 ; storing activity consume average energy 4,1922 Kkal/minutes, they get extra wage in the amount of Rp 1.000 ; Those activity is heavy work activity. CV Gunung Mas company had been giving axtra wage appropriate with cosumed energy (from the result analysis)

DESIGN AND CONSTRUCTION OF RENOGRAPH FOR RENAL FUNCTION TEST USING CsI(Tl) DETECTOR AND MICROCONTROLLER AT89C51 -, Setyadi; Isaris, Rill
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 01 Agustus 2007
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The development of Renograph prototypes for renal function testing has been initiated in BATAN since 1983, five generation prototypes using NaI(Tl) Scintillation de-tector have been successfully constructed and utilized in hospitals. Due to the new re-gulation for human safety, then the use of low energy radioisotopes with shorter half life time should be considered. It requires to develop the new instrument of higher sensitivity and better performances. This paper presents design of renograph using CsI(Tl) scintillation as a new type detector and a 16 bits Microcontroller AT89C51 as the data processor for renal function test, so renograph with a high reliable and better performances in application is achie-ved. The use of CsI(Tl) and Microcontroller as the data processor is the development made from the previous prototypes, the system is also provided with a serial commu-nication facility to Personal Computer through serial-port RS 232. Static examination to the pulses generated by a Function Generator with fre-quency up to 12.000 Hz and the dynamic test using 137Cs and 60Co radiation sources have been carried out successfully. The non-linearity integral of the system shows the response is linear up to frequency of 65.000 Hz with strong correlation coefficient, that is R2 ~ 0,9999. The calculation of the statistical feasibility counting to the both CsI(Tl) detector equipments for the two sources above with confidence level of 0,95 give the Ï‡2 are 0.238 and 0.078. These are much smaller than the Ï‡2 value in the table, that is 0.711 for N = 5. Hence, the modified renograph system using CsI(Tl) and Microcontroller AT89C51 has good counting linearity and fulfills the counting feasibility statistically.

STUDI SIMULASI TRANSIEN AKIBAT SAMBARAN PETIR PADA SALURAN DISTRIBUSI 20 KV DI YOGYAKARTA DENGAN BANTUAN EMTP Hani, Slamet; Sabdullah, Mursid
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 01 Agustus 2007
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The transient over-voltage phenomenon in an electrical power system caused by weather factors for example rain, lightning and wind, as well as by technical factors for example switching, power electronic and electrical machines. This research was conducted for at distributed transient over-voltage on a 20 kV, and 3 phase 4-wire system, due to thunder pounce. A simple way for the analysis uses EMTP program (Electromagnetic Transients Program) which is a simulation tool to this case (At 20 kV distribution line from Kentungan Power station to Kalasan-Yokyakarta). The results show that transient over-voltage occurred along the distribution lines, and the voltages vary along the distribution line length and the location where the thunder struck.

OPTIMASI PENGGUNAAN TEKNOLOGI ALAT MESIN DALAM MENDUKUNG PRODUKTIFITAS PETANI DI KECAMATAN GALUR Santosa, Agus Djoko
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 02 Februari 2008
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The optimation of mechanism technology for land cultivation on Galur District in Kulon Progo Yogyakarta to be implementation becaused the decreased of the man la-bour for land preparation. The needs of the land preparation must be continued with me-chanism technology. The Needs of mechanization technology be calculate with linier pro-gramming. The Goal of the calculate are Rotary must be increased 4 units, and without moald board plow, Financial analysis to feasibility of the needs of the mechanism, and the decision of the chose implement for land preparation with Promethee method. And the goals of the research are mechanism technology sustainable on Galur District are needs for much farmer

STRUKTUR KECEPATAN GELOMBANG S DI DAERAH DEPAN BIDANG SUBDUKSI ALASKA DENGAN MENGANALISA SEISMOGRAM GEMPA C022801L DI STASIUN WHY Santosa, Bagus Jaya
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 02 Februari 2008
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

In this research the measured seismogram of C022801L, Washington U.S.A. is compared to the synthetic seismogram, which is recorded at WHY observation station in three dimensions, where the wave path resides in front area of Alaska subduction zone. The synthetic seismogram is calculated with the GEMINI Program, whose input is in the form of an earth model, which is radial symmetry and transversal isotropic, and the CMT solution of the quake.Simulation and seismogram comparison can only be conducted till a frequency to 15 mHz, because big discrepancies are found at surface wave and the depth wave phase ScS. The surface wave propagates along earth surface till a depth which is equivalent to depth of upper mantle; so that the fitting can be obtained by altering speed structure till base of upper mantle, where the corrections are conducted at bh speed gradient. Correction at upper mantle structure does not bring repair at wave phase ScS. Corrective is further executed at speed structure of shear wave S till CMB, until the good fitting at ScS wave is obtained. S velocity structure in front area of Alaska subduction zone has in reality a strong positive anomaly, and to get fitting at ScS wave, the positive anomaly continues at earth layers below upper mantle till CMB

ANALYSIS THE KINDS AND COMPOSITIONS OF RADIOISOTOPE ELEMENT WITHIN THE MINE SAMPLES BY MCA SPECTROMETRY IN WEST TIMOR ISLAND NUSA TENGGARA TIMUR Pasangka, Bartholomeus; -, Prayoto; Brotopuspito, Kirbani Sri; -, Waluyo
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 02 Februari 2008
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The problems analyzed in the research are the kinds and compositions of radioisotope within the mining substance in the West Timor Island. The purposes of the research : 1) to investigate and determine the kinds of radioisotope elements in the mining substance, 2) to determine the radiation energy, counts, half life, and percentage of radioisotope element deposit within the mining substance. The methods of the research include observation, survey, sampling, spectrometry, analysis, and interpretation. On the observation, survey, and sampling steps, the 50 samples taken are distributed at the survey location. Those samples are analyzed with the several steps including: to dry the samples, to refine, to burn until temperature 800o C, to stabilize and dry again. All samples are analyzed with spectrometry system on the multi-channel analyzer (MCA) that can separate element of the samples. The results obtained are that the kinds of radioisotope element deposit within the samples of mining substance consist of Actinium series component and other association elements, also energy radiation, counts, half life, and percentage of radioisotope element deposit within the mining substance respectively revolved between 26.6 keV to 1562.3 keV,1 cps to 24867cps, 3.16 minutes to 1.405 x 1010 years, and 0.19% to 99.00%. The main elements on Actinium series within the samples of mining substance comprise of U-235, Th-231, Pa-231, Th-227, Bi-211, and Rn-219, and other isotopes Bi-212, Th-232, Pb-212, Pa-234, Ac-228, Ra-226, and Pb-214, with energy radiation, counts, half life, and percentage of radioisotope element deposit respectively revolved between 26.6 keV to 426.9 keV, 1 cps to 24867 cps, 7.038 x 108 years to 1.405 x 1010 years, and 1.0% to 18.7 %. The association elements consist of Am-241, Cs-134, Cs-136, Cs-138, Ce-141, Ce-144, Ba-133, Ba-140, Cd-109, Se-75, Te-132, Co-57, Mo-99, Fe-59, Kr-85, Kr-88, Kr-89, Sb-122, Sb-124, Sb-125, Xe-125, Xe-131m, Xe-133m, Xe-135, Xe-135m, Xe-138, I-124, I-125, I-130, I-131, I-132, I-134, I135, Br-82, Y-91m, Y-92, Y-93, Y-94, W-187, Sr-91, Sr-92, Sr-93, Zr-97, Rb-89, Rh-105, Ni-65, Sn-133, Be-7, Nb-94, Nb-96, Nb-97, Ag-110m, As,76, Cr-51, Eu-152, and Tc-96.

PENGARUH PENGGUNAAN MINERAL LEMPUNG DENGAN PENAMBAHAN BAHAN ADITIF TSG 107 + Pb3O4 DALAM PEMBUATAN KERAMIK UNTUK IMMOBILISASI SLUDGE CaCO3 YANG MENGANDUNG CESIUM -, Basuki
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 02 Februari 2008
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Industry using radioactive agent of cesium will result of radioactive waste. The waste may be liquid or solid waste. When it is disposed to environment, it will be very harmful for human being and other living creatures. The objective of this research was to study effect of clay mineral for immobilization of CaCO3 waste as ceramic material, using absorption test, press test and leaching test.Method used is weight of 300 grams mix of ceramic material consisting of 80% base mineral composition (kaolin, 60%; feldspar 15%; clay, 5%). Waste of CaCO3 consisting cesium with variation of 5%, 10%, 15%, 20% and 25%. Additions of additive substance were 2%, 4%, 6%, 8% and 10%. Water varieties were 45, 5%, 6%, 8%, and 10% weight.Result of the research indicated that composition of base mineral making ceramic, addition of CaCO3 waste containing cesium and addition of additive influence heavily on velocity of leaching of ceramic monolith. Greater CaCO3 addition and additive addition caused lower leaching velocity. It was indicated with 5% to 15% CaCO3 addition, velocity decreased from 549.378 x10-6gram.cm-2.day-1 to 74.665x10-6gram.cm-2.day-1. Greater addition of CaCO3 result in lower density of ceramic monolith block as result from heating at 10000C, but weight decrease was greater. Water release in heating process led to holes in ceramic monolith block that would reduce its stress strength. In conclusion, amount of ceramic-making base mineral composition, CaCO3 waste, and additive addition affect density, weight decrease pre-and post-heating at 10000C, absorption level, stress strength and leaching velocity.

PENGARUH PENGGUNAAN MINERAL LEMPUNG DENGAN PENAMBAHAN BAHAN ADITIF TSG 107 + Pb3O4 DALAM PEMBUATAN KERAMIK UNTUK IMMOBILISASI SLUDGE CaCO3 YANG MENGANDUNG CESIUM -, Basuki
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 02 Februari 2008
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Industry using radioactive agent of cesium will result of radioactive waste. The waste may be liquid or solid waste. When it is disposed to environment, it will be very harmful for human being and other living creatures. The objective of this research was to study effect of clay mineral for immobilization of CaCO3 waste as ceramic material, using absorption test, press test and leaching test.Method used is weight of 300 grams mix of ceramic material consisting of 80% base mineral composition (kaolin, 60%; feldspar 15%; clay, 5%). Waste of CaCO3 consisting cesium with variation of 5%, 10%, 15%, 20% and 25%. Additions of additive substance were 2%, 4%, 6%, 8% and 10%. Water varieties were 45, 5%, 6%, 8%, and 10% weight.Result of the research indicated that composition of base mineral making ceramic, addition of CaCO3 waste containing cesium and addition of additive influence heavily on velocity of leaching of ceramic monolith. Greater CaCO3 addition and additive addition caused lower leaching velocity. It was indicated with 5% to 15% CaCO3 addition, velocity decreased from 549.378 x10-6gram.cm-2.day-1 to 74.665x10-6gram.cm-2.day-1. Greater addition of CaCO3 result in lower density of ceramic monolith block as result from heating at 10000C, but weight decrease was greater. Water release in heating process led to holes in ceramic monolith block that would reduce its stress strength. In conclusion, amount of ceramic-making base mineral composition, CaCO3 waste, and additive addition affect density, weight decrease pre-and post-heating at 10000C, absorption level, stress strength and leaching velocity.

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