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Indonesian Physical Review

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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 67 Documents

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ANALISIS DAN PEMODELAN INVERSI STRUKTUR BAWAH PERMUKAAN BERDASARKAN ANOMALI GRAVITASI PULAU LOMBOK Hiden Hiden; Kirbani SB; Wiwit S; Danang SH
Indonesian Physical Review Vol 2, No 1 (2019)
Publisher : Universitas Mataram

Sistem patahan, intrusi, dan daerah pengangkatan banyak terdapat di Pulau Lombok, tetapi secara visual tidak tampak di permukaan. Tujuan dari penelitian ini adalah menganalisis anomali gravitasi dan memodelkan struktur geologi bawah permukaan berdasarkan anomali gravitasi. Hasil penelitian menunjukkan korelasi yang baik antara karakteristik anomali Bouguer maupun anomali residual terhadap struktur yang telah diketahui di Pulau Lombok. Umumnya, anomali tinggi baik anomali Bouguer maupun anomali residu tinggi berkorelasi baik dengan singkapan zona Solo di sebelah barat, kerak magmatik tebal di sebelah timur dan area pengangkatan di selatan Lombok. Berdasarkan anomali residu tinngi, terdapat beberapa sesar lokal teridentifikasi dengan sangat jelas. Sementara anomali residu rendah tampak pada wilayah Kompleks Gunung Rinjani. Perkiraan sesar yang membelah dua Pulau Lombok (sesar Lombok: FL) tidak terbukti keberadaannya baik dengan anomali Bouguer, anomali residu maupun dengan pemodelan inversi 2D. Interpretasi hasil pemodelan inversi 2D menunjukan variasi batuan dengan densitas (2,625 – 2,858) kg/m3 yang terdistribusi secara spasial pada kedalaman (1,31 – 4,66) km.

EKSTRAK GETAH PEPAYA (Carica Papaya) DENGAN PENAMBAHAN Cu SEBAGAI DYE SENSITIZER SOLAR CELL (DSSC) Dian Wijaya Kurniawidi; Siti Alaa; Susi Rahayu
Indonesian Physical Review Vol. 1 No. 1 (2018)
Publisher : Universitas Mataram

Indonesia is a biodiversity country. Abundance of biological resources may encourage researchers to optimize its use. As an example papaya trees are utilized as raw material for thin films. Sap of papaya latex is doppinged with Cu. This composition is depositioned on top of FTO by spin coating method. The addition of Cu dopping aims to control the rate of crystallinity of the material. This research will add Cu between 10% and 50% solution. Based on FTIR test results, flavonoid compounds might be obtained with O-H group, some aromatic rings C = C and C = O, aliphatic compounds C-H and -CO. Flavonoid compounds are potentially utilized as dye for DSSC. The thickness of dye produced by doping Cu 10% is approximately (0.5-2) μm. Furthermore, dopping Cu from 20% to 40% can produce thickness around 10-50 nm. Meanwhile, the results of the XRD test show an effective Cu between 10% to 40%.

MODEL PREDIKSI CURAH HUJAN HARIAN MENGGUNAKAN JARINGAN SYARAF TIRUAN BACKPROPAGATION komang nonik afsari dewi; Syamsul Bahri; Irwansyah Irwansyah
Indonesian Physical Review Vol 2, No 1 (2019)
Publisher : Universitas Mataram

Weather is an atmospheric condition that occurs in a narrow area with a short space of time. Observations of weather elements are needed in everyday life. for it can affect the safety of air transportation. The weather element that is often predicted is rainfall. Rainfall in tropical regions such as Indonesia is one of the parameters that can describe weather conditions in general. The method used to predict rainfall was artificial neural network with backpropagation algorithm. The purpose of this paper is to apply the model of artificial neural networks with backpropagation algorithm to predict daily rainfall and to determine prediction accuracy based on Mean Square Error (MSE). The network used has 3 layers namely input layer. hidden layer. and output layer with 7 input neurons, 12 hidden neurons, and 1 output neuron. The activation function used were bipolar sigmoid function and linear function. Based on data analysis carried out using network architecture and parameters that had been determined with 578 data at the training stage. MSE values of 25,0639 was obtained and based on the results of the network training process. the prediction was quite well. In the testing stage. the model developed using data as much as 145. MSE value of 405,1994 was obtained. MSE obtained during the testing stage was greater than that of obtained during the training process due to several factors. one of them is because the weather is volatile so the weather conditions vary every year and global warming causes weather conditions to be unpredictable.

PARTICLES SIZE AND LATTICE STRAIN EFFECT ON THE OPTICAL CONSTANTS OF Fe3O4 NANOPARTICLES I Putu Tedy Indrayana; Margaretha Tabita Tuny
Indonesian Physical Review Vol. 4 No. 1 (2021)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v4i1.71

In the case of optical sensors such as the Surface Plasmon Resonance (SPR) sensor, the Fe3O4 nanoparticles play a role to boost the signal however they can increase the detection sensitivity of the biosensor. For this application, the optical properties of Fe3O4 nanoparticles need to be studied. The optical properties are described in terms of their optical constants. Therefore, this work was purposed to study the effect of the particle size and lattice strain on the optical constants of Fe3O4 nanoparticles. Samples were synthesized by using the coprecipitation technique. Two calcination temperatures, i.e., 150oC and 250oC for 4 hours were applied to the samples. Samples were characterized for their diffraction pattern and optical properties by using XRD and Specular UV-Vis Spectroscopy technique, consecutively. The particle size and lattice strain were estimated by using the Williamson-Hall (W-H) method. The effect of the particle size and their optical constants on the reflectance curve in the SPR sensor application was also performed toward a simulation by using Winspall 3.02 software. The results show that calcination temperature causes an increase in particle size and a decrease in lattice strain. The optical constants, such as absorbance (A), absorption coefficient (α), extinction coefficient (k), refractive index (n), dielectric constants (ε), optical conductivity (σ), and the Urbach energy (Eu) significantly depended on particles size and lattice strain. However, the particle size and optical constant were significantly influent the SPR angle in the reflectance curve of Fe3O4

Electromagnetic Wave Equation on Differential Form Representation I Gusti Ngurah Yudi Handayana
Indonesian Physical Review Vol. 1 No. 1 (2018)
Publisher : Universitas Mataram

One of the indispensable part of the theoretical physics interest is geometry differential. This one interest of physical area has been developed such as in electromagnetism. Maxwell's equations have been generalized in two covariant forms in differential form representation. A beautiful calculus vector in this representation, such as exterior derivative and Hodge star operator, lead this study. Electromagnetic wave equation has been expressed in differential form representation using Laplace-de Rham operator. Explicitly, wave equation shows the same form in Minkowski space-time like vector representation. This study is able to introduce us to learn application of differential form in physics.

MIKROZONASI GEMPABUMI DI DESA MEDANA DAN JENGGALA KECAMATAN TANJUNG KABUPATEN LOMBOK UTARA MENGGUNAKAN METODE MIKROSEISMIK Rahmatul Fatimah; Teguh Ardianto; Nurul Qomariyah
Indonesian Physical Review Vol 2, No 1 (2019)
Publisher : Universitas Mataram

Penelitian ini bertujuan mendapatkan peta mikrozonasi gempabumi di Desa Medana dan Jenggala, Kecamatan Tanjung, Kabupaten Lombok Utara berdasarkan nilai GSS (Ground Shear Strain) dan intensitas gempa dalam skala MMI (Modified Mercalli Intensity). Data mikrotremor dianalisis menggunakan metode HVSR (Horizontal to Vertical Spectral Ratio) untuk mendapatkan nilai frekuensi dominan dan faktor amplifikasi di setiap titik pengukuran, dari nilai tersebut digunakan sebagai data awal untuk mendapatkan nilai periode dominan, indeks kerentanan seismik (Kg), percepatan getaran tanah maksimum menggunakan metode Kanai, nilai GSS serta Intensitas gempa diperoleh menggunakan metode Wald. Berdasarkan hasil perhitungan, nilai GSS didapatkan nilai yang bervariasi untuk setiap desa, Desa Medana memiliki nilai GSS (0,465 x 10-4 – 9,06 x 10-4) dan Desa Jenggala (0,337 x 10-4 – 42,73 x 10-4). ini menunjukkan bahwa Desa Jenggala memiliki tingkat kerawanan lebih tinggi terhadap gempabumi dibandingkan dengan Desa Medana. Intensitas gempa pada kedua desa tersebut berada pada skala III, IV, V, dan VI (MMI) yang termasuk dalam tingkat kerawanan yang rendah hingga menengah.

ANALISIS ANOMALI SUHU PERMUKAAN LAUT DAN PENGARUH FENOMENA EL-NINO DAN LA-NINA TERHADAP PERUBAHAN NILAI ANOMALI SUHU PERMUKAAN LAUT DI PERAIRAN NUSA TENGGARA BARAT TAHUN 2008 - 2017 syahrul jamili; I Wayan Sudiarta; Lily Maysari Angraini
Indonesian Physical Review Vol. 1 No. 1 (2018)
Publisher : Universitas Mataram

Fenomena El-Nino dan La-Nina yang selanjutnya disebut ENSO sangat berdampak bagi cuaca dan iklim di Indonesia, salah satunya pada Perairan Nusa Tenggara Barat. Oleh karena itu, perlu dilakukan analisis anomali suhu permukaan laut di perairan Nusa Tenggara Barat. Data anomali SPL dan Indeks Nino 3.4 yang digunakan adalah data skunder dari stasiun ESRL-NOAA (Earth System Research-National Oceanic and Atmoshperic Administration) sedangkan data Indeks Osilasi Selatan dari stasiun AG-BOM (Australian Government-Bureau of Meteorology) dari tahun 2008 sampai dengan 2017. Penlitian ini bertujuan untuk mengetahui distribusi anomali SPL di perairan Nusa Tenggara Barat dari tahun 2008-2017 dan untuk mengetahui kondisi perairan NTB saat terjadi El-Nino dan La-Nina berdasarkan Indikator Indeks Nino 3.4 dan Indeks Osilasi Selatan (IOS) tahun 2008-2017. Berdasarkan Indikator Indeks Nino 3.4. Kejadian El-Nino level kuat diikuti dengan menurunnya nilai anomali SPL di Perairan Nusa Tenggara Barat sedangkan kejadian La-Nina level kuat diikuti dengan peningkatan anomali SPL perairan NTB. Untuk melihat hubungan antara data anomali SPL dengan Indeks Nino 3.4 dan IOS digunakan metode analisis regresi dan korelasi. Dari hasil penelitian ini didapatkan bahwa distribusi anomali SPL perairan Nusa Tenggara Barat pada tahun 2008 hingga 2017. Terlihat nilai anomali SPL bagian utara rata-rata cenderung meningkat dibandingkan dengan perairan Nusa Tenggara barat bagian selatan

ZONASI POTENSI RAWAN GERAKAN TANAH DI KECAMATAN WATES KABUPATEN BLITAR DENGAN METODE STORIE Dina Asmaul Chusniyah; Didik Yudianto
Indonesian Physical Review Vol 2, No 1 (2019)
Publisher : Universitas Mataram

Lokasi Kecamatan Wates terletak di Kabupaten Blitar bagian Selatan yang memiliki satuan morfologi perbukitan sedimen dengan bukit bergelombang dan kemiringan landai yaitu antara 10-30% yang membentuk punggung bukit tidak teratur.Metode desk study merupakan suatu metode yang dilakukan untuk mengumpulkan data maupun informasi secara sekunder. Pada data sekunder dilakukan analisis tumpang susun (overlay) dengan Sistem Informasi Geografis (SIG).Hasil penelitian ini berupa peta rawan gerakan tanah, peta ini diperoleh dari overlay antara beberapa peta, yaitu peta geologi, peta curah hujan, peta topografi, peta kemiringan lereng, dan peta pengembangan lahan. Dari hasil overlay tersebut diperoleh proses penggabungan beberapa peta tematik dengan area yang sama dan menghamparkan satu dengan yang lain untuk membentuk satu layer peta baru yang memberikan informasi mengenai beberapa lereng, mulai dari lereng 15%-20%hingga lereng >40%, dengan curah hujan antara 1500-2000 mm/tahun hingga >2000 mm/tahun. Daerah tersebut di kelompokkan menjadi zona gerakan tanah rendah, sedang dan tinggi. Warna hasil overlay peta ditentukan oleh besar intensitas pixel penyusunnya. Warna ini diperoleh dari besar kecilnya intensitas cahaya yang ditangkap oleh sensor. Karena intensitas cahaya di alam (gradasi intensitas analog) tidak terbatas dan belum ada alat yang mampu menangkap seluruh gradasi warna sehingga dilakukan proses kuantisasi yaitu suatu proses transformasi intensitas analog yang bersifat kontinu ke daerah yang memiliki intensitas diskrit.

THE ANALYSIS OF ATTENUATION COEFFICIENT AND ACOUSTIC IMPEDANCE OF CEILING PANEL USING IMPEDANCE CHAMBER METHOD Satriogi Putramulyo; Rahadi Wirawan; Siti Alaa; Nurul Qomariyah
Indonesian Physical Review Vol. 1 No. 1 (2018)
Publisher : Universitas Mataram

The purposed of this research is to determine the attenuation coefficient and acoustic impedance of ceiling panel like plywood, calsiboard and bamboo woven. The influence thickness, paint coated, air cavity increment of the attenuation coefficient and acoustic impedance of these ceiling panel are also mesured. The impedance chamber method with range of frequency 100 Hz – 5000 Hz are used here. The result shows that the average of attenuation coefficient for plywood panel, calsiboard panel and bamboo woven panel are 0,37 Npmm-1, 0,62 Npmm-1 and 0,28 Npmm-1 respectively. In addition, the acoustic impedance of these panel is 1,33 x 106 kgm-2s-1, 3,74 x 106 kgm-2s-1 and 1,15 x 106 kgm-2s-1. The attenuation coefficient is decreased with the increasing thickness of the panel and the same trend is founded of the acoustic impedance. Meanwhile, the paint coated can increase attenuation coefficient and acoustic impedance. For the air cavity increment ceiling panel, the attenuation coefficient and acoustic impedance are less than the solid panel.

THE ANALYSIS OF SEISMOTECTONICS, PERIODICITY, AND CHANGING OF QUAKES LEVEL IN WEST NUSA TENGGARA AREA BASED ON 1973 – 2015 DATA Melinda Utami Istiqomah; Bambang Sunardi; Marzuki Marzuki; Suhayat Minardi
Indonesian Physical Review Vol 2, No 1 (2019)
Publisher : Universitas Mataram

This research was conducted as one of the earthquake disaster mitigation efforts in Nusa Tenggara Barat region, because this region is one of the regions in Indonesia which has a relatively high level of seismicity. The purpose of this research is to determine seismotectonic parameter, earthquake periodicity along with the average of seismicity rate changes in Nusa Tenggara Barat region. The data used in this research is the data sourced from the United States Geological Survey (USGS) and Badan Meteorologi Klimatologi dan Geofisika (BMKG) from Januari 1973 until February 2015 for Bali Strait region up to Banda Sea with coordinate boundaries of 1140–1300 East Longitude and 40-130 South Latitude. This research was conducted using the maximum likelihood method with second party of software Zmap ver 6.0 also software ArcGis ver 10 to map seismotectonic parameter, periodicity and the average velocity of seismicity rate changes. Variation b value range between 0.972–1.44, a low value of b are associated with high stress levels, and vice versa. The a value range between 6.67- 9.1, its show that the regions with high a value experience a relatively high earthquake incidence rate, and vice versa. The density of earthquake is about -2.63 to -2.01 logN/km2 or the occurrence of earthquakes in the area is very rare. Earthquake periodicity with magnitude (M) 6 SR is 5 to 18 year, M 6.5 SR is 16 to 67 year, M 7 SR is 54 to 304 year, and M 7.5 SR is 178 to 1.386 year. The average of seismicity rate changes on a case that occurred in Sumbawa in 1982 is more than 125%, meanwhile the earthquake that occurred in 2009 is more than 75%.Copyright © 2019IPR. All rights reserved.

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