cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota semarang,
Jawa tengah
INDONESIA
BERKALA FISIKA
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Physics
BERKALA FISIKA adalah jurnal saintifik yang diterbitkan secara periodik 3 bulanan. Jurnal ini memuat kajian-kajian Fisika baik kajian teoretik maupun hasil eksperimen. Jurnal ini juga memberi ruang yang luas bagi kajian – kajian aplikasi fisika dalam bidang teknologi, ilmu-ilmu hayati dan kedokteran.
Arjuna Subject : -
Articles 9 Documents
 1 
Search results for , issue "Vol 9, No 4 (2006): Berkala Fisika" : 9 Documents clear
Survei Resistivitas untuk Menentukan Distribusi Tahanan Jenis Batuan Bawah Permukaan Cekungan Daerah Sedimentasi Kuwu Yuana, Taufiq; Yulianto, Gatot
BERKALA FISIKA Vol 9, No 4 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (202.37 KB)

Abstract

Geophysical survey with resistivity method has been done in Bledug area, Kuwu, Grobogan, Central Java which have geology or geophysic phenomena mud blast or mud volcano. The principle resistivity method is measurement resistivity of rock by conducting current and also measure potential difference.This survey using NANIURA Resistivitymeter Model NRD 22S. Resistivity measurement has  been done sounding with schlumberger configuration. The result 3 sounding point, northside, southside and among bledug area. Data processing using IPI version 6.0 for windows program. The result of data processing is thickness and rock resistivity. Final interpretation made with combining sounding data and geology data so that subsurface picture of resistivity distribution. The result of final interpretation shown  bledug area and surrounding is thicknesses which have a distribution resistivity of rock  has the range 0,1-1 Ωm. The conclusion that survey area is flake from salt dome.     Keywords: Bledug Kuwu, resistivity method, mud vulcano
Perhitungan Kecepatan Terminal Obyek Jatuh di Udara Edi Widodo, Catur
BERKALA FISIKA Vol 9, No 4 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (164.838 KB)

Abstract

A program for determined terminal velocity of falling object in the air have been done with Python programming language version 4.2. Program was simulated interaction between massive object spheris with fluid gas (air). Program was construct by mean finite difference equation in object oriented programming Python. Object simulation is falling massive object spheris in static fluide. Input parameter is mass and radius object and viscosity  of  fluid. Output is direction and velocity of object. The result of simulation indicated the terminal velosity is depend on mass and radius of object  and viscosity of fluid.
Pengaruh Ukuran Butir Terhadap Porositas dan Permeabilitas pada Batupasir Nurwidyanto, M. Irham; Yustiana, Meida; Widada, Sugeng
BERKALA FISIKA Vol 9, No 4 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (245.576 KB)

Abstract

It has been done a research to know the influence of grain size to permeabiality and porosity on sandstones from Ngrayong Formation, Ledok Formation, Kerek Formation and Selorejo Formation. The Permeability is measured by RUSKA Permeameter Gas, while the porosity is measured by  Porosimeter Gas A-9756 series. The grain size is then determined  using grain size analysis method. After the calculation, the grain size is attributed to permeability and porosity of sandstones with the analysis regresi method. Results obtained indicate that the influence of grain size significant at six sandstones. Based on the statistic calculation it has been obtained the relation  with Linear regression  equation Log k= -5.7 Log d + 15 with r2=0.7, for the grain size to permeability and = -1.9x102d +75 with  r2=0.7,  for the relation of grain size to porosity.   Key Word: sandstone, grain size, porosity, permeability
Analisis Atribut Seismik untuk Identifikasi Potensi Hidrokarbon Maulana Hadi, Johan; Nurwidyanto, M. Irham; Yulianto, Gatot
BERKALA FISIKA Vol 9, No 4 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (205.875 KB)

Abstract

Rms amplitude and spectral decomposition attribute have been extracted for hydrocarbon potential identification in Amandah area, Talangakar Formation, North West Java Basin. Purpose of rms amplitude extractions is to see the change of lithology which is extreme. Example is like reservoir existence. Spectral decomposition has been used to see reservoir at thin thickness. The seismic attributes has been extracted from seismic data 3D Pre Stack Time Migration (PSTM). Log data has been taken from a well (AMD-01) to interpret and determine reservoir thickness in interest zone. Seismic attribute analysis has been used to see existence and shape of channel’s geometry spreading. The result of rms amplitude attribute extraction is reservoir which can be detected clearly at 10 ms, 20 ms, 30 ms and 40 ms window analysis. Whereas the result of spectral decomposition attribute extraction is reservoir which can be detected at 15 Hz – 25 Hz frequency with 30 ms and 40 ms window analysis. The result of rms amplitude and spectral decomposition attribute analysis shows hydrocarbon in Amandah area, Talangakar Formation is potential in channel depositional facies with depositional direction at north-south (N-S) and north nort east – south south west (NNE-SSW) and  thickness high of channel is concern at 36-60 m.   Key words: Seismic attribute, rms amplitude, spectral decomposition, reservoir,
Pengukuran Tebal Kontaminasi Zat Radioaktif pada Permukaan Tanah Secara In Situ Menggunakan Spektrometer Gamma Portabel Wijianto Wijianto; Much. Azam; Evi Setiawati; Bunawas Bunawas
BERKALA FISIKA Vol 9, No 4 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (180.708 KB)

Abstract

Determination of contamination’s thickness on the ground for  homogeneous  source compound Cs -137 and Co-60 use portable gamma  spectrometry with height purity germanium detector ( HPGe detector) have been done.There are two methods to determine contamination’s thickness on the ground surface. The first method is Korun’s modification by looking for the total count of gamma ray before and already to experience attenuation for Cs-137 and Co-60 then divided by the decrease of linear attenuation coefficient Cs-137 and Co-60. The second is Xu comparison method by made variation of distance from ground surface to detector surface then compared with total count of gamma ray from one source Cs-137 or Co-60 during counting time. The results from experiment obtained for Korun’s modification for the actual thickness 10 cm, 20 cm and 24 cm have an error at 2 % , for actual thickness 12 and 16 cm,and an error at 3 %, for actual thickness 6 cm and 8 cm an error of 4 % and, for actual thickness 4 cm have an error at 9 %. Then for the Al Ghamdi  to Xu Comparison method,  for Co-60 in the actual thickness 6 cm and 10 cm have error 3 % and 12 %, and for Cs-137 in the  actual thickness 10 cm and 6 cm have error 9 % and 48 %.   Key words:  HPGe detector, portable gamma  spectrometry, contamination, Korun’s modification and Xu comparison method.
Optimasi Elektroda Pada Sistem Pembangkit Plasma Non Termik untuk Meningkatkan Kuantitas Benih Mangrove Azam, Much.; Hidayanto, Eko
BERKALA FISIKA Vol 9, No 4 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (246.533 KB)

Abstract

The Mangrove is the tropics  nature resources that has two aspects, economics and ecology. This plant can be  iradiated   by the corona discharge. It is need to radiate mangrove seed with nitrogen and analize it’s  growt.  For that have need optimations of the electrode on the non thermics plasma generator system  in order to get the effective and the efficient radiations.  The steps of the research are : analize system, make a prototype, test the prototype with simulations, compare  the simulations result with the experiment result and analize the results. From the research can get conclution that: 1) had been succes to make prototype of  the mangrove plant reproduction  system by the corona discharge plasma technology with the point-plant electrode, 2) the simulations result show that  electrical fields shall increase if the distance from electrode has been  decreases, or the voltage of electrode has been  incresed, or the distance among electrode has been decreased  or  the value of the electrode radius.has been opotimum, 3) the result of simulations show that the current density  shall  decrease if distance among electrode has been decreased, 4)for the same distance electrode, the electricel fields of the experiment results  is bigger than the simulations result, because the value of permeability and permittivity medium on the simulation is using the  value of    the vaccum  space.     Key words : the non thermics plasma, iradition, Mangrove
Rancang Bangun Alat Pengukur Densitas Optik Radiograf Sinar-X Digital Sumariyah, Sumariyah; Gunadi, Isnain; Mujib, Syaiful
BERKALA FISIKA Vol 9, No 4 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (330.474 KB)

Abstract

A digitized X-ray radiograph’s optical density measurer has been designed.  It’s scale work is between  0.00 to  4.42. The main part of  this instrument is an optocopler sensor which will convert the light passing by  to an analog current. An optocopler circuit is a combination of LED as a light source, and a photoresistor as a light sensor. The sensor circuit is combined with a voltage devider circuit so that the voltage caused by the light and the output is work reversely. Besides, it combined with an instrumentation amplifier which amplifies the output voltage of the whole sensor. A decoder then added to the circuit to translate the BCD code to a seven segment display. The related segment, then, turned on according to the magnitude of the output voltage. The last part is a seven segment displayer which displays the measure’s result. According to a testing oxamination, the instrument is able to produce a measurement result till a resolution of 0.01.
Interpretasi Data Seismik Refraksi Menggunakan Metode Reciprocal Hawkins dan Sofware SRIM (Studi Kasus Daerah Sioux Park, Rapid City, South Dakota, USA) Wahyuningrum, Sri; Yulianto, Gatot; Nurwidyanto, M. Irham
BERKALA FISIKA Vol 9, No 4 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (267.518 KB)

Abstract

Data processing of seismic refraction has been done. This data processing was the secondary data from seismic measurement result in the Sioux Park area, Rapid City, South Dakota, USA using EG refraction & G Geometrics Model ES-1210 seismic refraction instrument made in America with 12 geophones. The seismic refraction data processing was to determined the velocity and the deepness of eachs layer, and make geology under surface model then to interpreted the the data processing result using Reciprocal Hawkins method and SRIM software. On the seismic data processing used Reciprocal Hawkins method and SRIM (Seismic Refraction Inverse Modelling) software. Reciprocal Hawkins method used time depth concept and SRIM software used delay time concept. The time depth value or the delay time value was same with a half value of intercept time.The result from the data processing using Reciprocal Hawkins method was obtained threes layer, that are the seismic wave velocity of the first layer is 1013 ft/s, the second layer is 4007 ft/s and the third layer is 6887 ft/s. While the result of the deepness calculation obtained the deep of first layer range is 0,93 ft – 11,24 ft, the second layer ranging is 8,72 ft – 19,38 ft and from data processing the result using SRIM software obtained seismic wave velocity of the first layer is 970 ft/s, the second layer is 3485 ft/s and the third layer is 6150 ft/s, while the result of deepness calculation of the first layer range is 0,10 ft – 7,20 ft, the second layer range from 3,40 ft – 27,00 ft. From the under surface image model can be interpreted that the first layer is mouldy  layer which represent cover layer, the second layer is clay stone layer, sand ( dry, having the pass character) and third layer is napal stone at Spearfish formation which has impermeable characteristic or waterproof. Key words: delay time, intercept time, Reciprocal Hawkins method, seismic refraction
Pereduksian COX, NOX, SOX, HC dari Kendaraan Bermotor dengan Menggunakan Plasma Non-Termik Nur, Muhammad; Wirawan, Bukit Yuta; Adi Wijaya, Wahyu; Suseno, Ahmad; Sumariyah, Sumariyah
BERKALA FISIKA Vol 9, No 4 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (291.701 KB)

Abstract

Reduction NOX gas from motor vehicle 1486 cc emission have been done by using corona glow discharge plasma which awakened with power source from modified system ignition of car.NOX Gas is result emission of motor vehicle 1486 cc at 2000 rpm. Flow NOX source are joined with reactor. Corona glow discharge plasma awakened in the reactor with knife to plane electrode geometry configuration with power source from modified system ignition of car. Corona that happened in reactor which containing of motor vehicle gas emission 1496 cc will yield ion, electron, and energetic radical. NOX will turn into compounds which do not dangerous and it’s indicate that pollutants in reactor was reduced.  To get the decomposition efficiency of NOX it’s require to be done the measurement of concentration of NOX before and after reduced. The biggest decomposition efficiency of NOX which obtained in this research is 81.38 % at distributor rotation equal to 1500 rpm with current equal to 80µA. Anion and cation analysis show there are cation NH4+ and anion CO32-, SO32-, and SO42-, that giving hypothesize that one of compiler compound of crust result of system prototype to reduce NOX are ammonium carbonate ((NH4)2CO3), ammonium sulfide ((NH4)2SO3), and ammonium sulphate ((NH4)2SO4).

Page 1 of 1 | Total Record : 9

 1 

Filter by Year

2006 2012


Reset
Filter By Issues
All Issue Vol 28, No 2 (2025): Berkala Fisika Vol 28, No 1 (2025): Berkala Fisika Vol 27, No 2 (2024): Berkala Fisika Vol 27, No 1 (2024): Berkala Fisika Vol 26, No 2 (2023): Berkala Fisika Vol 26, No 1 (2023): Berkala Fisika Vol 25, No 4 (2022): Berkala Fisika Vol 25, No 2 (2022): Berkala Fisika Vol 24, No 4 (2021): Berkala Fisika Vol 24, No 3 (2021): Berkala Fisika Vol 24, No 1 (2021): Berkala Fisika Vol 23, No 4 (2020): Berkala Fisika Vol 23, No 3 (2020): Berkala Fisika Vol 23, No 2 (2020): Berkala Fisika Vol 23, No 1 (2020): Berkala Fisika Vol 22, No 4 (2019): Berkala Fisika Vol. 22 No. 4 Tahun 2019 Vol 22, No 3 (2019): Berkala Fisika Vol. 22 No. 3 Tahun 2019 Vol 22, No 2 (2019): Berkala Fisika Vol. 22 No. 2 Tahun 2019 Vol 22, No 1 (2019): Berkala Fisika Vol. 22 No. 1 Tahun 2019 2015: Berkala Fisika Vol. 18 No. 4 Tahun 2015 2015: Berkala Fisika Vol. 18 No. 3 Tahun 2015 2015: Berkala Fisika Vol. 18 No. 2 Tahun 2015 2015: Berkala Fisika Vol. 18 No. 1 Tahun 2015 2014: Berkala Fisika Vol. 17 No. 4 Tahun 2014 2014: Berkala Fisika Vol. 17 No. 3 Tahun 2014 2014: Berkala Fisika Vol. 17 No. 2 Tahun 2014 2014: Berkala Fisika Vol. 17 No. 1 Tahun 2014 Vol 16, No 4 (2013): Berkala Fisika Vol 16, No 3 (2013): Berkala Fisika Vol 16, No 2 (2013): Berkala Fisika Vol 16, No 1 (2013): Berkala Fisika Vol 15, No 4 (2012): Berkala Fisika Vol 15, No 3 (2012): Berkala Fisika Vol 15, No 2 (2012): Berkala Fisika Vol 15, No 1 (2012): Berkala Fisika Vol 11, No 2 (2008): Berkala Fisika Vol 14, No 4 (2011): Berkala Fisika Vol 14, No 3 (2011): Berkala Fisika Vol 14, No 2 (2011): Berkala Fisika Vol 14, No 1 (2011): Berkala Fisika Vol 13, No 4 (2010): Berkala Fisika Vol 13, No 3 (2010): Berkala Fisika Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus Vol 13, No 2 (2010): Berkala Fisika Vol 13, No 1 (2010): Berkala Fisika Vol 12, No 4 (2009): Berkala Fisika Vol 12, No 3 (2009): Berkala Fisika Vol 12, No 2 (2009): Berkala Fisika Vol 12, No 1 (2009): Berkala Fisika Vol 11, No 4 (2008): Berkala Fisika Vol 11, No 3 (2008): Berkala Fisika Vol 11, No 1 (2008): Berkala Fisika Vol 10, No 4 (2007): Berkala Fisika Vol 10, No 3 (2007): Berkala Fisika Vol 10, No 2 (2007): Berkala Fisika Vol 10, No 1 (2007): Berkala Fisika Vol 9, No 4 (2006): Berkala Fisika Vol 9, No 3 (2006): Berkala Fisika Vol 9, No 2 (2006): Berkala Fisika Vol 9, No 1 (2006): Berkala Fisika More Issue