Identification Geothermal Reservoir of Telomoyo Mount from Anomaly Magnetic Data using 3D Magnetic Inversion

The geophysical investigation research of Telomoyo Mount has been done. We aim to get a description about reservoir of the geothermal system by geomagnetic survey. Magnetic data acquisition has been carried out in 83 points with approximately 44 km 2 of around. The total magnetic anomaly directly modeled by Mag3D software. Using inversion of magnetic 3D, the alteration rock that to be a manifestation of geothermal field has been corrected in 3 areas, they are Keningar, Kendal Duwur, and Sepakung. They have low susceptibility value that approximately -0.173 to -0.498 (SI) and indicated as upflow zone of Telomoyo mount geothermal system. Kendal Duwur area becomes a main reservoir in the 1400 to 3000 meters of depth

Program Simulasi Anomali Magnetik Total Untuk Benda Prisma Tegak Tiga-dimensi

Telah dibuat program pemodelan simulasi anomali magnetik total dengan pendekatan benda berbentuk prisma 3 dimensi. Anomali magnetik total dihitung berdasarkan parameter masukkan posisi benda, inklinasi benda termagnetisasi, deklinasi benda termagnetisasi, inklinasi medan bumi, deklinasi medan bumi, orientasi benda termagnetisasi terhadap arah utara dan besar manetisasi benda ke dalam program pemodelan. Hasil program menunjukkan untuk benda yang mempunyai sudut inklinasi istimewa yaitu 00, 450, 900 hasil perhitungan memperlihatkan anomali benda untuk inklinasi 00 dan 900 menggambarkan benda berada di daerah kutub utara dan selatan sedangkan untuk inklinasi 450 menggambarkan anomali medan magnetik mempunyai kutub ganda

Magnetic Modeling of the Diwak-Derekan Geothermal Area with Extension to Bawen, Central Java

In an effort to further advance understanding of Diwak-Derekan geothermal system, a second period of geomagnetic survey of the area including Kaliulo hot spring, Jatikurung hot spring and Kendalisodo geothermal hot spring has been carried out. The magnetic residual anomalies have been reproduced especially on the southern part of the study area. 3D magnetic analysis and interpretation of geological data acquired and collected in the field. Based on magnetic field anomaly and the field geological data, a speculation shows that magnetization intensity assumed for the existence of a cooling magma intrusion is suggested at the southern part of the study area, that is located at Sajen Village

PENDETEKSI KADAR ALKOHOL PADA PENGEMUDI MENGGUNAKAN SENSOR TGS 2620 BERBASIS MIKROKONTROLER ATMEGA8535

Pada penelitian ini dilakukan pembuatan sistem pendeteksi kadar alkohol pada pengemudi menggunakan sensor TGS 2620 berbasis mikrokontroler ATMega8535. Sistem ini mendeteksi kadar alkohol dari bau mulut pengemudi kendaraan tersebut meminum minuman yang beralkohol dengan cara mendeteksi bau mulut menjadi kadar alkohol dari pengemudi tersebut. Deteksi alkohol pada pengemudi ini dilakukan dengan memanfaatkan sensor TGS 2620, ADC dan mikrokontroler. Nilai yang terukur pada sensor akan di konversi ADC kemudian akan diolah ke mikrokontroler. Data keluaran dari mikrokontroler akan ditampilkan pada LCD. Sistem ini dirancang apabila pengemudi tersebut terdeteksi kadar alkohol kurang dari 6% mobil dan led berwarna hijau akan tetap menyala, dan apabila kadar alkohol yang terdeteksi antara 6% sampai 10% lampu led berwarna kuning dan mobil akan tetap menyala, sedangkan kadar alkohol yang terdeteksi lebih dari 10% led berwarna merah dan buzzer akan menyala seelama 1 menit dengan memberikan tanda-tanda peringatan setelah itu mobil akan mati. Kata Kunci: Alkohol, Sensor TGS 2620, mikrokontroler ATMega853

Identifikasi Bidang Gelincir Pemicu Tanah Longsor dengan Metode Resistivitas 2 Dimensi di Desa Trangkil Sejahtera Kecamatan Gunungpati Semarang

Landslides was happened by landslide surface. Landslides Identification of landslide surface using dipole-dipole array geoeletrical resistivity 2D method has been conducted at Trangkil Sejahtera Sukorejo Village Gunungpati Regency Semarang. Interpretation of subsurface structure showed in 2D. Field data has processed using RES2DINV program which gives stones resistivity distribution and depth of layers as a result. The result of RES2DINV is entered to CorelDraw to obtain 3D section. Landslide surface has detected by CorelDraw result\u27s. The interpretation show that at Perumahan Trangkil Sejahtera lithology consist of four layers i.e. sandstone, clay/lanau, wet clay, and topsoil. Slip surface was located on lanau/wet clay layers with resistivity 0,492-9,11 Ωm and dept of layers 2,65-6,47 m. Type landslides research area is kind of translational and rotational slides

Interpretasi Struktur Bawah Permukaan Daerah Manifestasi Mineral Emas Sistem Epithermal dengan Metode Polarisasi Terimbas (Induced Polarization) di Daerah “X” Kabupaten Garut Jawa Barat

A geophysical investigation has been done using Induced Polarization Method at area “X”, Garut, West Java. The purpose of this investigation is to identify the sub-surface stucture of a minerals gold epithermal system manifestation area.The research area is a gold prospect area which is a mining concession area ofAneka Tambang, Tbk. Stratigraphy lithology constituent part of the study area Jampang Formation which consists of andesite lava, andesite breccia, hornblende, and fine tuffaceous rocks. Induced Polarization method is usingelectrical properties of rocks by detecting the electrical polarization on the surface of metallic minerals beneath the earth\u27s surfaceThe processed data is measured with Dipole-dipole configuration, with electrodes spaced 25 meters. Path length 200 meters, so the expected penetration depth reaches 600 meters. Data processing use software AGI EarthImager2D and Geosoft , is obtain imaging the model 2D and 3D subsurface. The processing results is present in 2D and 3D, From the modeling results indicate that the tuff and Crystallin Tuff rock and minerals sulphide (si-ka-il, ka-il) with resistivity values ranging from 150 to more than 1000 ohm.m ohm.m and chargeabilitas values ranged from 100 ms to more than 300 ms, distribution pattern is decreased from north to south and then to east in penetration depth reaches 600 meters of subsurface.Volume for estimated potential of minerals gold epithermal system manifestation is 161.302.421,7 m

Identifikasi Jenis Batuan Candi Dukuh, Candi Ngempon dan Candi Gedong Songo Menggunakan Sonic Viewer-sx 5251

Rock identification with rock mechanics properties of rock samples to determine the type of Dukuh temple , Ngempon temple and Gedong songo temple, with the ultrasonic wave method using Sonic Viewer SX - 5251. Travel time of ultrasonic waves on the sample is used to obtain S and P wave velocity. Data has processing using Excel software. Value of the S and P wave velocity, shear modulus , rock elasticity , and Poisson 's Ratio will be correlated with rock density tables, P and S wave velocity tables and rock mechanics properties table it can be seen kind of rock from each of the rock physics properties. The research result shows that rock composite Ngempon temple, Dukuh temple , and Gedong Songo are Andesite. In addition to the density values which obtained, the level of rocks weathering can be defermind as well. Dukuh B rock sample with a density of 2.66 gm /cm3 can be classified in level I, it show that those rocks are strong and good. On the other samples of the Ngempon temple, gedong Songo or from another Dukuh the density values which obtained are from 2.33 to 2.49 can be classified at level II or it can be said to be strong enough

PENERPAN PETRI-NET PADA MODEL GERAKAN BERJALAN TROTTING ROBOT BERKAKI EMPAT (QUADRUPED)

Nowadays many robots has produced not just on a few scale, but also on large for helping human on doing task everyday corresponding the function. By the way, the function can be good functionate if the components, which support to the robot, can be good functionate, too, like the other one is robot walked way movement. Here, we look on four legs of robot walked movement using trotting, because we can find this nowadays and the trouble is kind than robot walked movement with two legs. On this case, we will use max-plus algebra to solve this problem to get robot walked way model on trotting which is like what we want

Pemodelan Struktur Bawah Permukaan Daerah Sesar Jiwo Klaten dengan Metode Medan Magnet Total

This study, using the method of total magnetic field in the area of ​​Central Java Klaten, aims to interpret the subsurface structure of the fault zones surrounding Prambanan, Wedi, and Gantiwarno district that became the suspect of the aftershocks cause occurring on May 27, 2006. The total magnetic field measurements use GSM19T Series magnetometre with the accuracy of ± 0.5 nT which includes 158 points. From the interpretation result using the second vertical derivative analysis, it can be known that there are three fault areas which are categorised as normal faults. The first fault is found in the volcanic rocks composed by the layers of volcanic breccia, lava and tuff. It is characterised by a change in the susceptibility value from 0.3 to 0.2 cgs. The second section is in Kebo Butak rock formation comprising the layers of sandstone, clay, silt, and algomerat. It is characterised by changes on the susceptibility values from 0.126 to 0.007cgs and from 0.33 0.126 cgs. The last fault is located in the Semilir formation consisting of tuff rocks, pumice breccias and tuffaceous sandstone marked by changes on the susceptibility values ​​from 0.25 to 0.1 cgs and from 0.5 to 0.25 cgs