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INDONESIA
INDONESIAN JOURNAL OF APPLIED PHYSICS
Published by Universitas Sebelas Maret
ISSN : 20890133     EISSN : 24776416     DOI : -
Core Subject : Science,
Astronomy Energy Materials Science & Nanotechnology Physics
Indonesia Journal of Apllied Physics provides rapid publication of short reports and important research in all fields of physics. Indonesia Journal of Apllied Physics publishes articles that are of significance in their respective fields whilst also contributing to the disclipline of physics as a whole. Articles should be submitted to the Editorial Office of Indonesia Journal of Apllied Physics through this site. Further information on submission is also available at this site
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Articles 8 Documents
 1 
Search results for , issue "Vol 4, No 01 (2014): April" : 8 Documents clear
Distribution mapping of metal sediment using polarization data interpretation on the field “X” in PT Newmont Nusa Tenggara (PT NNT) Sukri Arjuna; Adi Susilo; Sunaryo S
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 01 (2014): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i01.1174

Abstract

Geophysical research has been done on mapping distribution of metal deposits in the field "X" PT Newmont Nusa Tenggara using induced polarization geoelectric method pole-dipole configuration. Measurements performed using IRIS intrument type Elrec Pro where measurements of seven lines with length 2.3 km and electrode spacing 100 m. Induced polarization data furtheranalyzed by using Res2dinv version 3.56 and Surfer 10. Interpreted based on the parameters of chrageability and resistivity that correlated with regional geological information from the study area. As a result, the structure of rocks beneath the surface lithology research area consists of five units major rock that is tuffan claystone unit, sandstone tuffan unit, limestone unit, lava-brecciaunit, and andesite-basalt unit. Mineralization zone at the high chargeabilitas at 69.7 to 155 msec range supported by the low resistivity in the range of 4.21 to 26.5 Ωm which straight of anomalies in West-East direction at the depth of ± 50-400 m.
Curved Dyonic Domain Walls in Four Dimensions Bobby Eka Gunara
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 01 (2014): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i01.1164

Abstract

In this short paper we show the existence of solitonic solutions of four dimensional ungauged N=1 supergravity coupled to arbitrary vector and chiral multiplets whose Ricci scalar curvature is constant. The Ricci scalar of spacetimes indeed depends on the σ-model, namely the complex scalars and their first derivative. Then, we give two explicit models, namely static domain walls and static spherical symmetric black holes which are related to our previous works.
ZCO/CNT Composites Coated on Silver Substrates as Symmetric Supercapacitor and their Dielectrics Characterization at Various Frequencies Markus Diantoro; Lisa Ainun Najihah; Ahmad Taufiq; Abdulloh Fuad; Arif Hidayat; Subakti S
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 01 (2014): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i01.1176

Abstract

Supercapacitor is a high power density energy storage device which complements the lack of batteries and conventional capacitors. One material which has a great potential in the manufacture of composite supercapacitor is spinel ZnCo2O4/carbon nano tube and abreviated in the later case as ZCO/CNT. Composition variations in ZCO/CNT composites is expected to the performance of supercapacitor especially the dielectric properties and specific capacitance. Inthis study the composite ZCO/CNT was made from raw materials of ZCO nano crystal which was prepared from previous research on which employing sonochemistry technic, carbon nano tube, and 1-methil 2 pyrolidine. A screen printing method was used in this experiment to deposite the composite on silver substrates. The separator in between of two identical composite structures was prepared from isotactic polypropylene. We used KOH 6 M which was implemented as electrolyte of the composites. Characterization of composite structures has been performed using X-RD, while the morphology characterization using SEM. It was found that the dielectric supercapacitor increase by increasing of mass fraction of ZCO in the composite. Thehighest dielectric constant is reached at 1.89 x 106 and the specific capacitance of 81 F/g for 3:1mass ratio of ZCO : CNT at 100 Hz.
Study of Macrobending Losses Effect in Plastic Optical Fibber. Egyn Furqon Ghozali; Mohtar Yunianto; Nuryani N
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 01 (2014): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i01.1166

Abstract

Experimental study to analyze the effect of macrobending losses in plastic optical fiber triple bending model based on PC (personal computer) has been conducted. The data is gathered by measuring the change of the light intensity due to the presence of bending on optical fibers. The bending causes losses of optical fiber that is read by WIM (weight in motion) Acquisition program based on Borlan Delphi 7. The optical fibers are plastic with diameter of 3 mm. The diameter of pin is 8 mm and the space between the pin is 5 mm. The light source is a LED (λ=676 nm). As a result, the losses of optical fiber increase with the enhancement of bending. The increase trend linear to sensitivity of the sensor with gradient of 0,1063 and R2 of 0,9626. Therefore, the proposed design might be applied as a WIM sensor.
Solution of The Schrödinger Equation for Trigonometric Scarf Plus Poschl-Teller Non-Central Potential Using Supersymmetry Quantum Mechanics Cari C; Suparmi S; Antomi Saregar
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 01 (2014): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i01.1156

Abstract

In this paper, we show that the exact energy eigenvalues and eigen functions of the Schrödinger equation for charged particles moving in certain class of noncentral potentials can be easily calculated analytically in a simple and elegant manner by using Supersymmetric method (SUSYQM). We discuss the trigonometric Scarf plus Poschl-Teller systems. Then, by operating the lowering operator we get the ground state wave function, and the excited state wave functions are obtained by operating raising operator repeatedly. The energy eigenvalue is expressed in the closed form obtained using the shape invariant properties. The results are in exact agreement with other methods.
Measurement of Attenuation Coefficients of Near Surface Material Using SASW Method Suharsono S
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 01 (2014): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i01.1178

Abstract

The spectral analysis of surface waves (SASW) is an in situ non-destructive method. It has been developed and used for many years in the fields of geotechnical engineering and site characterization. It is typically used in evaluation of elastic moduli and layer thickness of soils, rocks and pavements.In this study the SASW was used to measure an attenuation coefficient (α) of near surface material at 15 development sites with different material e.i. soils, granite and methamorphics rock.. The attenuation coefficient which is the exponential decay constant of the amplitude of surface wavepropagation was approximated by Bornitz equation. The amplitude of vertical ground surface vibration generated by impact tests on the ground surface was measured at various radial distances.A good empirical correlation between the measured attenuation coefficients and the corresponding shear modulus and SPT or RQD data were established. These results suggest that the attenuation coefficient could be used as an alternative parameter for characterization of near surface material. Based on this method, the subsurface material at sites the study can be classified into two groups.The first group represented a low stiffness material with attenuation values of greater than 0.00516 s/m and the second group was a high stiffness material with attenuation values of less than 0.00150 s/m.However, this method of evaluation was still in development stage and needs to be substantiated with more results of measurements.
Identification of Sandstone Reservoir Saturated by Oil Using Low Frequency Analysis with base on CWT and AVO Analysis Sudarmaji S; Budi Eka Nurcahya
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 01 (2014): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i01.1168

Abstract

Identification of sandstone resevoir saturated by oil has been conducted by mean low frequency and amplitude versus offset (AVO) analysis. Low Frequency analysis was has been conducted among 3D and 2D seismic data of PSTM gather using continuose wavelet transform (CWT) around 15hz. Low frequency analysis was done by calculating attribute gradient time frequency of instantaneous amplitude using continuous wavelet transform (CWT) around 15hz for detecting the existing diffusive wave from reflection seismic. Diffusive wave is a wave that appears due to fluid movement in porous rock, especially fluid of hydrocarbon with certain viscosity and permeability. While amplitude versus offset (AVO) analysis was done for detecting the impedance character of sandstone reservoir that related to porous rock. Amplitude versus offset (AVO) analysis was done by calculating gradient*intercept and observing the curve of wave reflectivity as a function of offset. The positive value of gradient*intercept and curve of reflectivity as a function of offset could be identified as AVOclass III and correlated to sandstone reservoir with low impedance and good porosity.
Charge Carrier Mobility Analysis of Chlorophyll Thin Film Spirulina sp Produced by Spin Coating Muhamad Mustain; Defi Sulistyana; Utari U; Budi Purnama
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 01 (2014): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i01.1158

Abstract

Analysis of carrier charge mobility of Spirulina sp thin films produced by spin coating havebeen conducted. Measurement of carrier charge mobility has been done by I-V method.Mobility of carrier charge decreased with an increased of the layer number. It indicates that athreshold value of carrier charge of population number over flow on conduction band.

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