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INDONESIA
Indonesian Physical Review
Published by Universitas Mataram
ISSN : 26151278     EISSN : 26147904     DOI : -
Core Subject : Science, Education,
Education Physics
Indonesian Physical Review is a peer review journal which is managed and published by Physics Departement, Faculty of Mathematics and Natural Sciences, Universitas Mataram. This journal is published periodically three times a year, in January, May and September. IPR is Open Accsess for all readers and includes research developments in physics both experimentally and analytically. Focus and scope include Theoritical Physics, Computation, Material sciences, Instrumentation, Biophysics, Geophysics, and Optics.
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Articles 221 Documents
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THE THICKNESS OF A THIN FILM SYNTHESIZED FROM LIDAH MERTUA PLANT (SANSEVIERIA TRIFASCIATA) USING A DIP COATING METHOD Ervina Sandra Dewi; Siti Alaa; Dian Wijaya Kurniawidi; Susi Rahayu
Indonesian Physical Review Vol. 2 No. 3 (2019)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (386.668 KB) | DOI: 10.29303/ipr.v2i3.34

Abstract

A study has been conducted on the characterization of optical properties of thin films from lidah mertua (Sansevieria trifasciata) with dip coating method. The dip coating method was applied with different temperature and different time immersion treatments. The measuring variables in the manufacture of this thin film were tested based on the optical properties of their absorbance value of the extract and the thicknessof thin film. The absorbance spectral of extraction pigments were measured using UV-Vis in the wavelength range 350 nm to 700 nm. The results of the measurements showed that the extract of the S. trifasciata has high absorbance. Beside that, the minimum coating thickness is produced by a concentration of 12.5% with a 5 minute immersion time of 520 nm.
THREE-DIMENSIONAL RESISTIVITY MODEL FOR GROUND WATER EXPLORATION IN VOLCANIC ZONE OF TIDAR PLETEAU, MALANG, EAST JAVA Irwan, Irwan; Ilham; Adi Susilo
Indonesian Physical Review Vol. 3 No. 1 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v3i1.39

Abstract

Geoelectrical resistivity method is popular technique for subsurface mapping of groundwater, mining exploration, and structural geology. For case study in Tidar Plateau which characterized by hard rock of volcanic breccia, lava, tuff, and conglomerate,  the groundwater system occurs only by the secondary porosity (faulting, facturing, and weathering). Therefore it becomes difficult task for determine position of good well site in Tidar Plateau. Geoelectrical technique by Schlumberger configuration was choosen to investigated the ground water system in this area. Total 5 Vertical Electrical Sounding (VES) acqusition point (400 m length measurement; spacing 10 m) for data measurement with coverage area about 400 x 400 m2. For data processing was used IP2Win, Progress3, and RockWork 16.  The data processing results showed high accuration with avarage Root Mean Square (RMS) error about 0.3 – 8.3 %. According to resistivity results, the study area has resistivity between  0.3– 2.5x104 . The rocks which have resistivity between 0.3 – 12.52  interpreted as sandy-clay; 12.52 – 50  interpreted as wet sandstone (aquifer); 129 – 178  interpreted as conglomerat; 700 – 1300  interpreted as tuff, sand, and dry gravel; 2600 – 2.5x104  interpreted as volcanic breccia. This geoelectrical results has succesful finding the fresh water at VES 5 after drilled at depth 100 m at wet sandstone formation. To findout distrubution of aquifer layer, a three-dimensional (3D) resistivity model was developed. The 3D resistivity model shows the aquifer layer image look the dome-like structure and image the fracture regions which becomes the pathway of groundwater system. 
SPEKTRO PLUVIOMETER SEBAGAI ALAT PENENTU DIAMETER DAN KECEPATAN JATUH BUTIRAN HUJAN Yulia Satriadi; I Wayan Sudiarta; Dian Wijaya Kurniawidi
Indonesian Physical Review Vol. 3 No. 1 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (464.723 KB) | DOI: 10.29303/ipr.v3i1.32

Abstract

Cuaca merupakan gejala alam yang terjadi dalam waktu yang relatif singkat, dan perubahan cuaca yang tiba-tiba dapat menimbulkan kejadian bencana alam. Fenomena cuaca yang berdampak langsung  antara lain adalah hujan. Dalam penelitian ini dilakukan penentuan diameter dan kecepatan jatuh butiran hujan. Diameter dan kecepatan jatuh butiran air yang dihasilkan dapat dijadikan sebagai pemodelan butiran hujan yang bermanfaat untuk mitigasi bencana. Penelitian ini menggunakan metode optical spektro pluviometer yang dilengkapi dengan laser diode sebagai pemancar cahaya dan sensor  cahaya TEMT6000 sebagai penerima cahaya. Prinsip kerja spektro pluviometer berdasarkan perubahan tegangan yang dihasilkan oleh butiran hujan ketika menghalangi cahaya ke sensor. Diameter butiran air yang terukur yaitu diameter butiran air hasil observasi (Dobs) berkisar pada rentang 3,8 mm – 5,7 mm,  diameter butiran air hasil model (Dmod) berkisar pada rentang 3,6 mm hingga 5,5 mm. Kecepatan jatuh butiran air hasil observasi (vobs) pada rentang 0,98 m/s – 1,7 m/s dan hasil kecepatan jatuh butiran air hasil model (vmod) pada rentang 0,9 m/s hingga 2,5 m/s.
PENENTUAN UKURAN BUTIR KRISTAL CuCr0,98Ni0,02O2 DENGAN MENGGUNAKAN X-RAY DIFRACTION (XRD) DAN SCANNING ELECTRON MICROSCOPE (SEM) Lalu A. Didik
Indonesian Physical Review Vol. 3 No. 1 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (653.067 KB) | DOI: 10.29303/ipr.v3i1.37

Abstract

Telah dilakukan pengukuran ukuran butir Kristal CuCr0,98Ni0,02O2 dengan menggunakan persamaan Scherer dan analisa langsung menggunakan Scanning Electron Microscope (SEM). Kristal CuCr0,98Ni0,02O2 disintesis dengan menggunakan metode solid state reaction.  Untuk dapat mendapatkan data menggunakan persamaan Scherer, sampel harus terlebih dahulu dikarakterisasi menggunakan X-Ray Difraction (XRD). Hasil penghitungan menggunakan persamaan Scherer menunjukkan ukuran butiran Kristal sebesar (0,113 ± 0,015) µm dengan ralat relatif sebesar 13,2 %. Sedangkan pengukuran secara langsung menggunakan SEM menunjukkan ukuran butir Kristal sebesar (1,08 ± 0,23) µm dengan ralat relatif sebesar 21 %. Perbedaan hasil penghitungan dengan hasil pengukuran menggunakan SEM disebabkan karena morfologi lapisan. Morfologi kristal yang dihasilkan oleh scanning berkas elektron sekunder pada SEM memungkinkan untuk mendapatkan perbesaran gambar yang cukup sehingga dapat dilakukan pengukuran secara langsung. Sedangkan penghitungan ukuran butir Kristal CuCr0,98Ni0,02O2 menggunakan  persamaan Scherer berdasarkan prinsip difraksi sinar X dengan jarak antar celahnya adalah jarak antar atom pada Kristal sehingga untuk mendapatkan data ukuran butir Kristal menggunakan persamaan Scherer sampel harus terlebih dahulu dikarakterisasi menggunakan XRD. Selain itu, karena dilakukan secara langsung pengukuran hasil karakterisasi menggunakan SEM bukan mengukur ukuran butir Kristal melainkan ukuran partikel.   
ANALISIS KUALITAS MINYAK GORENG BERDASARKAN SUHU PEMANASAN DENGAN METODE KOEFISIEN VISKOSITAS FALLING BALL Khaeratin Shoaliha; Kurniawan Arizona; Bahtiar Bahtiar
Indonesian Physical Review Vol. 3 No. 1 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (792.71 KB) | DOI: 10.29303/ipr.v3i1.38

Abstract

This study aims to determine the effect of temperature on oil viscosity or viscosity using the falling ball method. The approach in this study uses a quantitative approach to the type of laboratory experimental research. The population of this research is cooking oil, by taking three types of oil samples. The three types consisted of palm oil, coconut, and olive which were then observed for their effects on temperature using the fall ball method. Data were collected through laboratory experiments with measurements three times using the falling ball viscosity method. The data analysis technique used is regression analysis. Based on tests that have been done, it can be observed that palm oil before it is heated has a viscosity value of 0.885 Ns / m2, when palm oil is heated to temperatures of 40˚C, 60˚C, 80˚C, and 100˚C the viscosity value changes to 0.854 Ns / m2, 0.754 Ns / m2, 0.828 Ns / m2 and 0.616 Ns / m2. Coconut oil before heating has a viscosity value of 0.828 Ns / m2, when heated with the same temperature the viscosity value changes to 0.666 Ns / m2, 0.588 Ns / m2, 0.572 Ns / m2, and 0.524 Ns / m2. Olive oil before heating has a value of 0.919 Ns / m2, when it is heated the value decreases to 0.869 Ns / m2, 0.774 Ns / m2, 0.746 Ns / m2, and 0.680 Ns / m2. Correlation value obtained based on data calculations is -0.616 meaning that temperature and viscosity have a strong relationship, a negative sign indicates that the relationship is inversely proportional. It can be seen that there is an effect of viscosity value on cooking oil temperature. 
THE STUDY OF GRAPHENE BAND GAP USING HATREE FOCK METHOD IN MOLECULAR SCALE Siti Alaa; Muhammad Fajrin; Eva Nurhaliza; Dian Wijaya Kurniawidi; Susi Rahayu; I Wayan Sudiarta
Indonesian Physical Review Vol. 3 No. 1 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (463 KB) | DOI: 10.29303/ipr.v3i1.35

Abstract

Graphene is known as an advanced material that has good electrical conductivity and heat conductivity. To understand the nature of graphene it is necessary to calculate the energy, band gap and vibrate frequency at the nanoscale. One method that can be used is the ab initio calculation using the Hatree-Fock method. In this research, we performed a computational study of the electronic properties of grapheme within RHF/STO-3G basis set in different cluster molecules.  From this study we get band gap for graphene in ab initio level, have a consistant value around zero.  Using ab initio method, we can obtain a deeper understanding about the graphene behaviour at the molecular scale.
ZONASI SITE EFFECT DAN ANALISIS BAHAYA PENGUATAN GEMPA MENGGUNAKAN METODE DSHA UNTUK MENENTUKAN PGA DI KABUPATEN SUMBA BARAT DAYA Soulthan Salahudin Al Ayubi; Karyanto Karyanto; Nandi Haerudin; Syamsurijal Rasimeng; Rahmat C Wibowo
Indonesian Physical Review Vol. 3 No. 2 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1549.687 KB) | DOI: 10.29303/ipr.v3i2.44

Abstract

Southwest Sumba Regency is located in the Banda Arc area. Its position which is very close to the subduction area in the south of Indonesia caused a lot of tectonic activity and earthquake hazard. The arrangement of alluvium, coral, and thick deposits on the island of Sumba makes it prone to earthquake strengthening. Zoning of soil characters using site effects and DSHA method was carried out to determine the danger level of strengthening the Southwest Sumba Regency. Zoning of the site effect soil character uses microtremor data which is correlated with seismic hazard analysis to obtain the PGA values on bedrock and ground surface using the closest earthquake source. The area is dominated by Class 2 and 3 lands (f0 worth 1.333 - 5 Hz) according to the Kanai Classification (1983), with an amplification predominance of 3.8-8.3 times. This indicates that the research area is dominated by thick sediment deposits. The PGA value obtained from the DSHA method is known that Southwest Sumba Regency has a PGA soil of 0.075-0.19 g and a bedrock PGA of 0.067-0.085 g using earthquake record data in Sumba Subduction and Timor Subduction. With PGA estimation, it is known that the level of earthquake disaster vulnerability is high, located in the south of Southwest Sumba Regency which is suspected to be composed of thick sediments and close to the Sumba Subduction and Timor Subduction.Keywords: Site effect, predominant frequency, amplification, earthquake, DSHA, PGA
ANALISIS KETEBALAN LAPISAN BATUAPUNG FUNGSI JARAK DARI SUMBER MENGGUNAKAN METODE GEOLISTRIK RESISTIVITAS DI KECAMATAN LINGSAR, LOMBOK BARAT Yuyun Ustina; Bakti Sukrisna; Hiden Hiden
Indonesian Physical Review Vol. 3 No. 2 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (868.016 KB) | DOI: 10.29303/ipr.v3i2.41

Abstract

Letusan Gunungapi Samalas 1257 menghasilkan piroklastik seperti batuapung yang tersebar merata di sekitarnya. Salah satu daerah yang terkena dampak erupsi tersebut adalah Kecamatan Lingsar Kabupaten Lombok Barat. Penelitian ini bertujuan untuk mengetahui struktur resistivitas, ketebalan lapisan batuapung, dan analisa ketebalan terhadap jarak sumber di Kecamatan Lingsar Kabupaten Lombok Barat. Metode yang digunakan yaitu metode geolistrik resistivitas dan pengukuran nilai resistivitas batuan di Laboratorium. Hasil penelitian menunjukan lapisan batuapung dengan kedalaman (0.00 - 21.00) meter dengan ketebalan rata-rata (10.00 to 21.00) meter. Sementara hasil pengukuran Laboratorium menunjukan nilai resistivitas batuapung basah yaitu (23.9 - 40.0) Ohm-m dan (204.3 - 354.8) Ohm-m untuk batuapung kering. Ketebalan lapisan batuapung menipis secara eksponensial terhadap jarak dari sumber letusan. Penelitian selanjutnya, analisa volume tefra dan dinamika terjadinya letusan. 
ANALISA KANDUNGAN Fe DAN KARAKTERISTIK SIFAT LISTRIK PASIR BESI PANTAI TELINDUNG YANG DISINTESIS DENGAN BEBERAPA METODE Lalu A. Didik; Muh. Wahyudi
Indonesian Physical Review Vol. 3 No. 2 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (600.751 KB) | DOI: 10.29303/ipr.v3i2.58

Abstract

Telah dilakukan sintesis pasir besi berbasis pasir besi Pantai Telindung dengan menggunakan metode solid state reaction (SSR) dan copresipitasi. Sampel kemudian dikarakterisasi ukuran partikelnya menggunakan Pastikel Size Analyzer (PSA) dan konsentrasi Fe diukur menggunakan Atomic Absorption Spectroscopy (AAS). Karakterisasi sifat listrik meliputi konstanta dilektrik dan resistivitas. Konstanta dielektrik diukur menggunakan metode plat sejajar sedangkan resistivitas diukur menggunakan metode 2 titik probe. Ukuran partikel sampel yang disintesis dengan menggunakan metode SSR masih dalam ukuran micrometer yaitu sebesar 1,34 µm sedangkan ukuran partikel dengan menggunakan metode copresipitasi sudah mendekati ukuran nanometer yaitu sebesar 210 nanometer. Konsentrasi Fe dalam sampel sebesar 8,7 ppm pada sampel yang disintesis dengan menggunakan metode metode SSR sedangkan konsentrasi Fe pada sampel yang disintesis dengan menggunakan metode copresipitasi sebesar 12,9 ppm. Nilai konstanta dielektrik sampel yang disintesis dengan metode SSR sebesar 9,41 nilai konstanta dielektrik sampel yang disintesis dengan metode copresipitasi yaitu sebesar 14,22. Nilai resistivitas juga memiliki pola yang sama dengan konstanta dielektrik dimana nilai resistivitas sampel yang disintesis dengan metode SSR sebesar 0,078 Ωm. Sedangkan nilai resistivitas sampel yang disintesis dengan menggunakan metode copresipitasi sebesar 0,092 Ωm.
IDENTIFIKASI ORIENTASI REKAHAN MIKRO AREA PANAS BUMI MONTE AMIATA BERDASARKAN ANALISIS STUDI SHEAR WAVE SPLITTING Irfan - Hanif; Ahmad Zaenudin; Nandi Haerudin; Rahmat C Wibowo
Indonesian Physical Review Vol. 3 No. 2 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1021.678 KB) | DOI: 10.29303/ipr.v3i2.56

Abstract

Shear Wave Splitting is an application of seismic wave to analyse the anisotropy level of a certain medium. Generally, shear wave propagation through a rock formation will be polarized (φ) into two parts especially when the medium structures are different, such as fracture. The polarized shear wave which is perpendicular to fracture will propagate slower than the wave that propagates parallel to the fracture. The delay time (δt) of both wave is proportional with the fracture intensity along the wave propagation from the source to the station. The description regarding fracture orientation can be obtained by analysing both Shear Wave Splitting parameters (φ and δt), and this information is adequately important in geothermal exploration or exploitation phase at Mt. Amiata. Based on the result of this research, the micro earthquake source is focused on the east to the south area and spread along 3 earthquake stations. The existence of micro earthquake source is mainly focused at the depth of 1 to 4 km. In addition, the polarization direction of each earthquake station at the geological map shows a dominant fracture orientation consistently at NW-SE. All of the three stations also show that the polarization direction is integrated to the local fault existence in the subsurface. Furthermore, the research shows that the high intensity fracture distribution occurred at MCIV station area in the southern part of research location. Meanwhile, the low intensity fracture distribution occurred at ARCI and SACS station area in the western and the eastern part of research location. The high value of fracture intensity accompanied by the high amount of structure intensity, strengthen the prediction of the high anisotropy existence which potentially tends to the high permeability presence at the area.Keywords: shear wave splitting, anisotropy, fracture, geothermal, polarization direction, fracture intensity.

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