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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 267 Documents
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Sensor Fiber Optik Dari Bahan Fiber Optik Polimer Untuk Pengukuran Refractive Index Larutan Gula Nila Wulan Sari; Ahmad Marzuki; Riyatun R
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 2, No 02 (2012): IJAP VOLUME 02 ISSUE 02 YEAR 2012
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v2i02.1286

Abstract

This paper presents an experimental result on developing an optical fiber sensor for measuring refractive index of sugar solution. Sensor was developed using polymer optical fiber with diameter of 3 mm. This sensor is working based on intensity modulation due to reflection. Light coming out from the transmitter optical fiber is reflected by a mirror to the receiver optical fiber. Due to the variation of sugar concentration in solution surrounding this sensor, the way of light entering the fiber receiver depends on the sugar concentration (numerical aperture). It is clear from the experiment that light intensity detected by photodetector (represented by electric voltage) is linearly dependent (R2 = 0.987) on the variation of sugar solution refractive index.
Analisis Peak Ground Acceleration (PGA) dan Intensitas Gempabumi berdasarkan Data Gempabumi Terasa Tahun 1981 - 2014 di Kabupaten Bantul Yogyakarta Nugroho Budi Wibowo; Juwita Nur Sembri
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 6, No 01 (2016): IJAP VOLUME 06 ISSUE 01 YEAR 2016
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v6i01.1804

Abstract

Seismic historical record in Java period of 1981-2014 recorded that the Special Region of Yogyakarta was hit by damaging earthquake 4 times and hundreds of small earthquakes felt. This research was aimed to assess the peak ground acceleration (PGA) zone and the earthquake intensity based on historical data of earthquake occurrence in 1981-2014. Peak Ground Acceleration was calculated using Kanai equation and earthquake intensity using Wald equation. This research was conducted by using 231 microtremor data in Bantul District that derived from BMKG and also 147 data of damaging earthquake and small earthquake felt from BMKG. The result of this study represent peak ground acceleration value in Bantul District which was varied from 57.7-412.7 gal. Peak Ground Acceleration Zonation of Bantul District was diveded by 3 zones; first zone with PGA value 57.7-91 gal, the second zone with PGA value 92-179 gal and the third zone with PGA value higher than 180 gal. While based on earthquake intensity, Bantul District has damage potential of V-VII MMI in intensity scale.
Distribution of Iron Sand in The Widarapayung Coast Area at Regency of Cilacap Based on Magnetic Anomaly Data Sehah Allasimy; Sukmaji Anom Raharjo; Muhammad Andi Kurniawan
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 6, No 02 (2016): IJAP Volume 06 Issue 02 Year 2016
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v6i02.1896

Abstract

Interpretation on the magnetic anomalies data has been done in the Widarapayung coast area, District of Binangun, Regency of Cilacap to identify distribution of iron sand. The acquisition of magnetic intensity data in this area has been done in December 2015 and May 2016 using Proton Precession Magnetometer (PPM) with type of GSM-19T. The research area extends on the geographic positions of 109.2501°BT – 109.2702°E and 7.6781°LS – 7.6986°S. Magnetic anomalies data modeling is done with using Mag2DC for Windows software so obtained some subsurface anomalous objects model. The anomaly object model having a value of magnetic susceptibility of 0.0093cgs unit is interpreted as iron sand interspersed with silt, clay, sand, and gravel from the alluvium formation. This formation is lain at a depth of 1.709 to 11.966m and a length of 1576.7m. The iron sand contained in this formation is estimated prospects for exploitation. Based on the interpretation results, alluvium formation is also found at a depth of 1.140 to 30.769m, which expected be composed of silt, clay, sand, and gravel with a magnetic susceptibility value of 0.0051cgs unit. The content of iron sand in this 2nd alluvium formation is expected to be relatively small.
Identifikasi Pola Aliran Sungai Bawah Tanah Daerah Karst di Desa Gebangharjo Kecamatan Pracimantoro Menggunakan Metode Tomography Resistivity Konfigurasi Wenner-Schlumberger Yudi Purwanto; Darsono Darsono; Sorja Koesuma
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): IJAP Volume 07 ISSUE 02 YEAR 2017
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v7i2.12766

Abstract

This research is conducted using 4 lines data with 750 meters in length. Tomography resistivity with Wenner-Schlumberger configuration is used as this research methodology to take the data with a = 50 meters and n=1, 2, 3, 4, 5, 6. Resistivitymeter OYO 2119C McOHM-ELmodel is used as the instrument. Furthermore, the data is processed with two softwares; Res2Dinv ver. 3.56.22 to get 2D resistivity section and RockWork16to make 3D model of the site. The underground river’s chamber is made by hollow carbonate rocks with the resistivity of >412 Ωmand 117,6 Ωm – 412 Ωm for limestone’s resistivity as its capsrock. Researching to the depth of 173 meters, underground rivers are shown in the line 2 in the depth of 65 to 134 meters, 65 to 173 meters in the line 3, and in the cross section of line 3 and line 4. While in the first trajectory, another chamber is found within the depth of 12.5 to 40 meters. It is expected that the underground river is flowing to the south because of the chamber in third and fourth trajectory are lower than second trajectory.
Student’s Creativity Profile with Base on Thinking Model for Physics Problem Solving Hartono Bacong; Subaer S
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 5, No 01 (2015): IJAP Volume 05 Issue 01 Year 2015
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v5i01.250

Abstract

A research that aims to determine the profile of student’s creative who have a concrete sequential thinking styles, sequential abstract, concrete random, and abstract random in solving physics problems at the State University of Makassar. This study is a qualitative research. The sample was taken by using purposive random sampling technique. The data obtained were analyzed using Miles and Hubermann model. The results describe creativity of student thinking style in solving physics problems. The conclusion shows that the concrete sequential of thinking’s style "less creative", abstract sequential "quite creative", random concrete "less creative" and abstract random "creative" in solving physics problems at the State University of Makassar
Analysis of Soil Categories on Seismograf Sensor in Java Island Based on Ground Predominant Period and Vs30 Nugroho Budi Wibowo; Dian Susri Nurhaci
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 5, No 02 (2015): IJAP Volume 05 Issue 02 Year 2015
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v5i02.282

Abstract

The aim of this research is to analyze the categorization of soil at sensor site locations based on predominant period of the ground and Vs30. This study was conducted at nine sites seismograph sensors in Java and Madura. Data processing method is using HVSR (Horizontal to Vertical Ratio) based on the SESAME European research project. The Java and Madura Vs30’s data were obtained from the USGS. This study utilizes the criteria of JRA 1990 and BSSC 2000 were used to determine the soil categories. It is found that the criteria of JRA 1900 and BSSC 2000 satisfies some sites namely LEM, KMMI, UGM and WOJI. The site of LEM and UGM have a soil that can be categorized in C type (dense soil / sand to soft rock) with dense soil conditions to the rock weathering process. Site KMMI can be categorized in D type (stiff soil) with dense soil conditions. Whereas the site WOJI can be categorized in A + B type (Hard rock and firm to hard rock) with hard rock conditions.
Pattern Spread of Aquifer using Sounding Resistivity Method with Schlumberger Configuration in Dayu Gondangrejo Karanganyar Bugar Ashari; Darsono D; Darmanto D
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 01 (2014): IJAP Volume 04 Issue 01 Year 2014
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i01.1172

Abstract

The research on ground water survey by using geo-electric method Schlumberger was conducted at Dayu Village, Gondangrejo, Karanganyar. Geo-electric is one of the geo-physics method which learned about electrical current in or on the earth surface. The equipment used includes resistivitymeter, GPS (Global Position System), roll meter, hammer, electrodes, and cables. Thepurpose of this research is to determine the spread pattern of the aquifer, groundwater potential, the thickness and depth of the aquifer at Dayu Village. The thickness of the shallow aquifer in the area of Dayu is between 3 m to 12 m with a depth of less than 30 m, while the deep aquifer is having a depth of more than 30 m with thickness between 68.5 m up to more than 165.7m.Thereis a degradation of aquifer pattern from Jambu Village (West) to Mulyorejo Village (East).Inversely, we found an increase from Tanjung Lor Village (North) to Watudakon Village(south). Shallow aquifer that potentially contain much groundwater sources located in the village of Tanjung Kidul, Mulyorejo, Jambu, Kedung Ulo and Tanjung Lor. For deep aquiferispotentially found at Pucung village and Kedung Ulo village.
Problem Pengolahan Data Gaya Berat Mikro antar Waktu Supriyadi S
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 3, No 02 (2013): IJAP VOLUME 03 ISSUE 02 YEAR 2013
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v3i02.1244

Abstract

At time lapse microgravity survey will be got data in place for difference period. The Anomaly caused by subsidence and density change under surface which related to groundwater level change. This matter become problem when will take one of the anomaly sources to processed is furthermore. Reduction one of anomaly source cannot be done direct but must be done with filtering process. Process filtering done by using FFT (Fast Fourier Transform), its principal is to move data from time domain to frequency domain. At frequency domain this is mathematics process conducted. On subsidence case study in Semarang by using this technique indicate that subsidence value from time lapse micro gravity survey have tendency is equal to result from geodesy survey.
Analisis AVO untuk Mengetahui Penyebaran Hidrokarbon Berdasarkan Faktor Fluida (Studi Kasus Lapangan “H” Formasi Talang Akar Cekungan Jawa Barat Utara) Muhammad Nur Handoyo; Agus Setyawan; Mualimin Muhammad
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 3, No 02 (2013): IJAP VOLUME 03 ISSUE 02 YEAR 2013
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v3i02.1276

Abstract

Amplitude versus offset (AVO) inversion analysis can be used to determine the spread of hydrocarbons on seismic data. In this study we conducted AVO on reservoir layer Talang Akar’s formation (TAF). AVO inversion results are angle stack, normal incident reflectivity (intercept), gradient and fluid factor. Angle stack attribute analysis showed an AVO anomaly in the reservoir TAF layer, amplitude has increased negative value from near angle stack to far angle stack. The result of crossplot normal incident reflectivity (intercept) with gradient indicates reservoir TAF layer including Class III AVO anomaly. While the analysis of fluid factor attribute has a negative value thus reservoir TAF layer indicates a potential hydrocarbon.
Modifikasi Permukaan Elemen Peredam Bising dengan Profil Berbentuk Prisma Julius Indra Kusuma; H Harjana; Iwan Yahya
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 6, No 01 (2016): IJAP VOLUME 06 ISSUE 01 YEAR 2016
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v6i01.1794

Abstract

The influence of surface modification by using prism shaped profile on the sound absorption of absorber element was investigated experimentally. A prime number based configuration of the two types opened and closed type rism shaped profile inclusion was tested by using impedance tube according ASTM E1050 standard. The result shows that sound absorption at low frequency band below 200 Hz increased with the increasing of closed prism number. It is related to the coupling effect between the cavities of the absorber element and the prisms that changes reactance of the coupled structure. In the other side, a half wave resonance like effect occur on the use of opened prisms inclusion, which is increase the sound absorption performance at mid to high frequency range between 800 Hz to 1.25 kHz.

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