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INDONESIA
YOUNGSTER PHYSICS JOURNAL
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Physics
Arjuna Subject : -
Articles 12 Documents
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Search results for , issue "Vol 3, No 2 (2014): Youngster Physics Journal April 2014" : 12 Documents clear
IDENTIFIKASI JENIS BATUAN CANDI DUKUH, CANDI NGEMPON DAN CANDI GEDONG SONGO MENGGUNAKAN SONIC VIEWER-SX 5251 Pertiwi Pertiwi; Tony Yulianto
Youngster Physics Journal Vol 3, No 2 (2014): Youngster Physics Journal April 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

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 .Key Word :               Ultrasonic Wave, Sonic Viewer, Ngempon Temple, Dukuh Temple, Gedong Songo Temple, Weathering, and Andesite Rocks.
PENGOLAHAN MODEL KECEPATAN MENGGUNAKAN METODE RAY TRACING UNTUK MIGRASI DOMAIN KEDALAMAN (PRE STACK DEPTH MIGRATION) 2D PADA LAPANGAN “AV” Anjar Evita; Hernowo Danusaputro; Muhammad Mualimin
Youngster Physics Journal Vol 3, No 2 (2014): Youngster Physics Journal April 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

The research was done to process 2D seismic data by Pre Stack Depth Migration (PSDM) method on Field “AV”. The purpose of this study was to determine the appropriate interval velocity model for PSDM methods work. Interval velocity model obtained from the initial estimate using coherency inversion velocity model is usually not convergent. Interval velocity model should be improved through several stages in order to speed the estimated value closer to the value of actual speed. Some initial interval velocity model parameters should be improved to be more sensitive to lateral velocity variations for PSDM. The method used to improve the velocity model is horizon-based tomography with the concept of ray tracing. These methods made improvements to the speed and geometry of the reflector layer to produce a new interval velocity model. Model errors must be corrected by residual moveout analysis. The best analysis obtained from the fifth iteration to eliminated errors and increased depth value gathers. The exact value of the speed made a good quality image. The results of this research was PSDM Section or PSDM cross-section. The quality of PSDM cross-section was good enough to represented geological structures in the earth's sub surface.Keywords: PSDM, interval velocity model, horizon-based tomography, ray tracing, residual moveout analysis.
INTERPRETASI POLA ALIRAN FLUIDA PANAS BUMI DENGAN METODE SPONTANEOUS-POTENTIAL (SP) DAN SUHU PERMUKAAN DANGKAL DI LERENG UTARA GUNUNG TELOMOYO KABUPATEN SEMARANG Maila Shofa; Udi Harmoko; Sugeng Widada
Youngster Physics Journal Vol 3, No 2 (2014): Youngster Physics Journal April 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

The model heat flow at  Telomoyo Mountain Semarang District  has measured and identified  using spontaneous potensial and  shallow temperature surface methods.Field data has proceed using Microsoft Excel which the result entered to Surfer11 with the result map contour of SP and temperature distribution. The result showed that range anomaly SP about -40mV-70mV and distribution of temperature which has temperature range 23,5º-31ºC. The direction of heat flow direct from South to North-East.Key Words : Spontaneous-potential, shallow temperature surface, Sufer11, Model Heat Flow, Telomoyo Mountain
IDENTIFIKASI STRUKTUR BAWAH PERMUKAAN MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER DI AREA PANASBUMI DESA DIWAK DAN DEREKAN KECAMATAN BERGAS KABUPATEN SEMARANG Sigit Darmawan; Udi Harmoko; Sugeng Widada
Youngster Physics Journal Vol 3, No 2 (2014): Youngster Physics Journal April 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Diwak and Derekan is one of geothermal manifest which exist in geothermal system of Ungaran. Geoelectric method schlumberger configuration is one of the geophysical methods that used in the exploration of natural resources below the surface. The purpose of researching is to know layer of subsurface structure which control Diwak and Derekan geothermal manifest.Field measurement data in the field are potential differences and currents which can be used to calculate apparent resistivity value. After apparent resistivity value is created then processed using IPI2WIN program to know resistivity value in each layer with geology information validation.The results of the study showed six geoelectric layer of rock that is composed of layers of mudstone, siltstone, tuff, sandstone brecia and pasirtuf with resistivity values and different thicknesses. Interpretation of manually indicate the presence of two down faults that are weak zone where the fluid surface discharge Keyword: Geoelectric, Schlumberger, Geothermal, Fault, Diwak and Derekan
IDENTIFIKASI BIDANG GELINCIR PEMICU TANAH LONGSOR DENGAN METODE RESISTIVITAS 2 DIMENSI DI DESA TRANGKIL SEJAHTERA KECAMATAN GUNUNGPATI SEMARANG Arga Brahmantyo; Tony Yulianto
Youngster Physics Journal Vol 3, No 2 (2014): Youngster Physics Journal April 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

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’s.            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.Key words : Geoeletrical resistivity 2D, landslide surface, Trangkil Sejahtera, dipole-dipole, RESD2INV
INTERPRETASI BAWAH PERMUKAAN DAERAH SUMBER AIR PANAS DIWAK-DEREKAN BERDASARKAN DATA MAGNETIK Muhammad Ulin Nuha ABA; Tony Yulianto; Udi Harmoko
Youngster Physics Journal Vol 3, No 2 (2014): Youngster Physics Journal April 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Research has been carried out using a magnetic method that aims to interpret the subsurface structure of the area hot springs Derekan - Diwak based on the total magnetic field anomaly data. It also aims to investigate the geothermal system in the area.Some 99 points measurement areas were measured using PPM (Proton Precession Magnetometer) geometrics type GSM19T models to get the value of the total magnetic field and two points as a base station simultaneously measured using the PPM G856X models. Measurement data is processed by the daily variation correction and IGRF (International Geomagnetic Reference Field) correction. The data has been used to create a contour corrected total magnetic field anomalies and subsurface cross sections involving the upward continuation and reduction to the poles.The results of study showed the total magnetic field anomaly closure pair of positive and negative closure indicate a fault zone below the surface. Interpretation is strengthened by the results of the modeling showed two faults of Derekan - Diwak areas trending southwest- northeast. This fault zone is a media outlet fluid to the surface in the area of geothermal systems.Keywords: geothermal, fault, and total magnetic field
INTERPRETASI BAWAH PERMUKAAN SISTEM PANAS BUMI DIWAK DAN DEREKAN BERDASARKAN DATA GRAVITASI Syamsul Ilmi; Udi Harmoko; Sugeng Widada
Youngster Physics Journal Vol 3, No 2 (2014): Youngster Physics Journal April 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

ABSTRACTResearch has been carried out using a gravity method that aims to interpret the subsurface structure of the Diwak - Derekan hot springs area based on the Bouguer anomaly data. It also aims to investigate the geothermal system in the area.  The data aquisition was taken using gravitymeter Lacoste & Romberg.Data processing had been done with high correction tool, tidal correction, drift correction,  gravity absolute correction, gravity theoretical correction, free air correction, Bouguer correction, terrain correction to get the complete Bouguer anomaly.  Bouguer anomolay is projected to flat plane and upward continuation is used to separate the regional and residual anomaly. For 2D modelling interpretation by Grav2DC software.The results of study showed the complete Bouguer anomaly contour pair of positive and negative contour indicate a fault zone below the surface. Interpretation is strengthened by the results of the modeling showed a  fault of Diwak - Derekan areas trending southwest- northeast. This fault zone is used as a media outlet fluid to the surface of geothermal systems.Keywords: Gravity Method, 2D modelling, Diwak, Derekan
INTERPRETASI LAPISAN BAWAH PERMUKAAN DI AREA PANAS BUMI GUNUNG TELOMOYO, KABUPATEN SEMARANG MENGGUNAKAN METODE GEOLISTRIK RESISTIVITY KONFIGURASI SCHLUMBERGER Elida Septiana Putriutami; Udi Harmoko; Sugeng Widada
Youngster Physics Journal Vol 3, No 2 (2014): Youngster Physics Journal April 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Geoelectric measurements and interpretation have been conducted to obtain subsurface structure information in Geothermal area of Telomoyo Mountain at Semarang regency using Schlumberger configurationWe obtain a potential difference and current from field data acquisition that can be used to calculate the apparent resistivity value. Then, the apparent resistivity value is processed using IPI2win program to determine the value of resistivity in each layer using geological information as validation. The geoelectric results showed the presence of fault structures such as normal faults down and the layers which has resistivity values at 116 Wm with a depth at 106 - 120 m from the surface of geoelectric line are interpreted as the upper boundaries of the Caprock layer. Keywords: Resistivity, Schlumberger, Geothermal, Telomoyo Mountain
PENGARUH TEMPERATUR SINTERING TERHADAP SIFAT OPTIK LAPISAN TIPIS ZINC OXIDE (ZnO) YANG DIDEPOSISI DIATAS SUBSTRAT KACA DAN APLIKASINYA UNTUK MENDEGRADASI PEWARNA METHYLENE BLUE Nur Hasim Efendi; Heri Sutanto
Youngster Physics Journal Vol 3, No 2 (2014): Youngster Physics Journal April 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

In this research, ZnO  thin films have been successfully deposited on glass substrates by spraycoatingtechniquewith avariety the sintering temperature of 300 °C , 400 °C , 450 °C and 550 °C. Optical properties ZnO thin films were characterized by using UV-Vis spectroscopy. The ability ofphotocatalyst of ZnOfordegradation ofmethylene bluecolorwas observedthrough the absorbance test by using UV-Vis to obtain the percentage of color degradation. The results showed that the sintering temperature of ZnO affects the value of energy Gap of ZnO thin film. Higher sintering temperature resulted in higher energy gap. The largest gap energy generated from the ZnO sintering temperature of 450 ˚ Cwith values Eg 3.03 eV. ZnO photocatalyst activity of test results have been able to degrade methylene blue up to 97.62% were obtained from ZnO thin layer of sintering temperature of 450 ˚ C.Keywords: Photocatalyst, Spray coating, ZnO, Band gap energy, Methylene blue, Sintering temperature.
DISTRIBUSI FLUKS NEUTRON SEBAGAI FUNGSI BURN-UP BAHAN BAKAR PADA REAKTOR KARTINI Fatkhiyatul Athiqoh; Wahyu Setia Budi; Choirul Anam; Tri Wulan Tjiptono
Youngster Physics Journal Vol 3, No 2 (2014): Youngster Physics Journal April 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

The effective multiplication factor (keff) and the flux distribution in the Kartini reactor which used Uranium Zirconium Hydride (UZrH) as fuel, pure water (H2O) as moderators and cooland has been analyzed using Monte Carlo simulation. The flux distribution analyzed by splitting core reactor become 5 rings (B, C, D, E and F). The effective multiplication factor (keff) and flux distribution calculated by MCNP 4C with burn-up variation 0%, 2,5%, 5%, 7,5%, 10%, 12,5%, 15%. The result shows that the critical condition obtained from burn-up rate 0% up to 5%. The highest value of flux distribution in the middle, at ring B and the value gets smaller towards to edge of reactor core.Keywords : flux distribution, keff, MCNP, Kartini reactor

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