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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.

PENERAPAN METODE VERY LOW FREQUENCY (VLF) PADA LOKASI ANOMALI GEOMAGNETIK RENDAH Kanata, Bulkis; Zubaidah, Teti; Susanto, Oki Prio
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 02 Februari 2008
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The research with title Evaluation of measurement result of geomagnetic anomaly in lombok island, west nusa tenggara and analysis of itâ€™s relation with gravitation anomaly and prediction of local geology (Zubaidah, 2005) in area about 25 x 30 km2 result a isogam map, which known that the minimum geomagnetic anomaly equal to 558,194413 nT located in Seganteng, West Lombok (08035â€™46,2â€ LS, 116008â€™10,9â€ BT).Very Low Frequency Method is one of Geophysics methods that use magnetic com-ponent of electromagnetics field wich is caused by radio broadcaster use Frequency 15-30 kHz. VLF Method applied to know characteristic around the minimum geomagnetic anomaly in the form result of current density image which able to show conductive or itâ€™s not an measurement area.This VLF Acquisition conducted to know the zona of conductive layer as long as 2500 metres from south to north pass the minimum geomagnetic anomaly. The tilt data processing is done use Moving Average method and Linear filter with use Matlab 6.1 . The Result of data processing show the contour of current density with depth/space = 8 or maximum deep is 160 metres with conductive area is spread near the minimum geomagnetic anomaly which is estimated much water

FASIES DAN DIAGENESA FORMASI GAMPING-WUNGKAL DI DAERAH BAYAT, KLATEN JAWA TENGAH Mulyadi, Dedi; Siregar, M. Safei; -, Praptisih
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 02 Februari 2008
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The limestone of Wungkal Formation is the old tertiary sedimentary rocks existing between the metamorphic rock in Bayat complex, Klaten, Central Java.A thin section analysis was conducted on the limestone samples resulted in two facieses of carbonates, the foraminifera packstone and the foram-algal packstone. The diagenesis process includes microbal micritisation, cementation, dissolution and com-pacttion. Diagenesis occurred from marine environment, fresh water and burial. The for-mation of the Wungkal formation limestone took place during the mid Eocene to late Eo-cene at the basin slope of the shallow to slightly deep marine environment.

PERANCANGAN PERANGKAT LUNAK UNTUK PENGENALAN KARAKTER ASCII DARI GAMBAR BITMAP MENGGUNAKAN JARINGAN SARAF TIRUAN METODE PROPAGASI BALIK Utami, Ema; Hartati, Sri
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 02 Februari 2008
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

ANN is a method in soft computing that imitate the structure of biological nervous, where multiple nodes communicate with each other through synapses that interconnect them. That method can be utilized for pattern recognition processes, such as ASCI Icharacter recognition.This paper is aimed to develop ASCII character recognition using ANN method. Multilayer neural network is adopted in ANN with back propagation algorithm. A mapping method is used for preprocessing to segment a character image to be processed by ANN.The experimental results show that among all of successful segmented characters of all the training data having the different size of font, the system successfully recognizes characters up to 81.74 %. For the training data with different sizes and fonts data, the system recognizes the characters with an accuracy close to 55.74%. Among the unsuccessful segmented characters of all training data having different sizes of font, the system recognizes characters with an accuracy 67.53%. For the different sizes and fonts data, the system recognizes the characters with an accuracy close to 46.65%.

TINJAUAN PENGARUH DIAMETER BUTIRAN TANAH TERHADAP NILAI KOHESI, C DAN SUDUT GESER DALAM, ïª Afriani, Lusmeilia
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 02 Februari 2008
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Research about the influence of soil grain size to the value of cohesion c and internal shear angle j has been done by using direct shear test apparatus. The size of this instrument is a large box 500 x 500 x 300 mm. The soil sample for this research took from Criquebeuf-sur-Seine, Seine Maritime, North French. The soil grain size are 0/25 mm, 0/50 mm and 0/80 mm and it is classified as the coarse sol type. These results were then compared with that it uses sand sample from Fountainebleau, France. This research was done in the Regional Laboratorium of Street and Bridge in Rouen. Until now, research in the coarse grain soil are very rare due to the lack of instrument and facilities. The result indicates an important things where the grain size of soil will influences the cohesion value c, and the internal shear angle j. These values can be obtained from Mohr-Coulomb curve.

PENGARUH NILAI VARIANS DAN STEP SIZE TERHADAP MEAN SQUARE DEVIATION PADA LEAST MEAN SQUARE FILTER ADAPTIF Pagiling, Luther
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 02 Februari 2008
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Variant value and step size effect of an adaptive filter are required to know how system to work, how fast the reachable system stability and how big adaptive filter can be able to eliminate the noise. At LMS adaptive, all of variants value stability systems reached and assess variant of input influence mean square deviation (MSD) con-vergence.Stability of system reached at value of step size, correlation matrix ( R ), and to the number of certain element weight vector. Normalization data convergence by MSD is compared to bigger of linear error convergence from MSD, that way the things of compared to bigger MSD simulation convergence of MSD Theory. MSD Convergence compare diametrical with input variant value and assess step size.

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