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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 6 Documents
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Search results for , issue "Vol. 4 No. 1 (2021)" : 6 Documents clear
PARTICLES SIZE AND LATTICE STRAIN EFFECT ON THE OPTICAL CONSTANTS OF Fe3O4 NANOPARTICLES Indrayana, I Putu Tedy; Tuny, Margaretha Tabita
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

Abstract

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
PEMETAAN DAN ANALISIS GEOMETRI SESAR MENGGUNAKAN METODE GEOLISTRIK DI SELENGEN LOMBOK UTARA Saputra, Putrawan; Yasin, Syamsuddin; Hiden, Hiden
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.v4i1.76

Abstract

Aktivitas sesar merupakan faktor utama terjadinya gempa bumi seperti yang terjadi di Pulau Lombok. Sesar diduga banyak terdapat di Wilayah Lombok, baik sesar skala mayor maupun sesar minor. Oleh karena itu perlu dilakukan pemetaan keberadaan sesar dan analisis geometrinya, sehingga resiko bahaya dapat dimitigasi sebelum gempa khususnya di Kayangan Lombok Utara. Tujuan penelitian ini adalah untuk mengetahui keberadaan sesar dan menganalisis geometrinya di Desa Selengen Kayangan Lombok Utara. Metode yang digunakan adalah metode Geolistrik 2D. Hasil penelitian menunjukkan bahwa sesar yang terdapat di Desa Selengan adalah sesar mikro membentuk garis melalui rekahan yang tersingkap memanjang ke arah Timur Laut. Geometri rata-rata sesar: lebar 15,8 m, kedalaman 16,8 m dan Strike  Dip  Timur Laut (N37E/77). Penelitian selanjutnya akan dikaji tingkat kerawanan dan potensi likuifaksi dengan wilayah yang lebih luas menggunakan metode lain.
IDENTIFIKASI SIFAT FISIS KANDIDAT WAFER DARI LIMBAH TAHU SEBAGAI ALTERNATIF PAKAN TERNAK Rahayu, Susi; Nurhidayati, Nurhidayati; Kurniawidi, Dian Wijaya; Alaa, Siti
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.v4i1.72

Abstract

Inovasi pembuatan pakan ternak dalam sediaan wafer perlu dilakukan untuk menjadi alternatif pakan saat musim kemarau. Limbah tahu merupakan salah satu bahan dasar yang dimanfaatkan sebagai bahan pembuatan wafer. Tujuan penelitian ini untuk mengidentifikasi perlakuan yang direkomendasikan dalam pembuatan kandidat wafer berdasarkan karakteristik fisis wafer. Kandidat wafer ditinjau berdasarkan warna, kadar air, densitas wafer, densitas partikel, dan porositas.  Proses pembuatan wafer dilakukan dengan proses pemadatan dan pemanasan. Sebelum serbuk limbah tahu dicetak, dipastikan dahulu kadar air pada serbuk limbah tahu sesuai dengan stadar SNI 3148:2:200. Suhu pemanasan serbuk limbah tahu yang direkomendasikan menggunakan suhu 100oC. Karakteristik serbuk limbah tahu yang dihasilkan yaitu serbuk berwarna putih, kadar air sebesar 14,1% dengan nilai densitas partikel serbuk limbah tahu(𝜌sa ) 0,189g/cm3 serta porositas (𝜙sa ) 0,216%. Sedangkan untuk proses pencetakan wafer, suhu pemanasan yang direkomendasikan yaitu 70oC. Kandidat wafer yang diperoleh menghasilkan warna putih, tahan hingga 4 minggu, kadar air 7,19%, densitas partikel (𝜌p ) 0,254 g/cm3, densitas wafer 1,10 g/cm3 dan porositas 𝜙w sebesar 3,47±0,0118%. 
GRAVITASI: GAYA vs. GEOMETRI Yasmini, Luh Putu Budi
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.v4i1.69

Abstract

Perdebatan mengenai hakekat gravitasi masih banyak dibahas oleh para fisikawan hingga saat ini. Apakah gravitasi merupakan suatu medan gaya yang eksis dalam ruangwaktu atau suatu manifestasi geometri ruangwaktu. Di satu pihak, gravitasi dipandang sebagai suatu medan gaya yang dihasilkan oleh distribusi materi dan energi dalam ruang sebagai sumber medan tersebut. Di pihak lain, gravitasi dipandang sebagai manifestasi geometri ruangwaktu yang dibentuk oleh distribusi materi dan energi, dan sebaliknya, distribusi materi dan energi di dalam ruangwaktu dipengaruhi oleh geometri ruangwaktu itu.  Salah dua dari banyak teori gravitasi yang ada, yakni: gravitasi Einstein dan gravitasi teleparallel. Dalam teori gravitasi Einstein, gravitasi dan inersia digabungkan menjadi satu entitas tunggal yang secara geometrik diidentifikasi dengan koneksi Levi-Civita. Sedangkan, dalam gravitasi teleparallel, gravitasi dan inersia terpisah dengan dua entitas yang berbeda dengan makna yang berbeda. Gravitasi dipandang sebagai medan gaya (interaksi) pada ruangwaktu, sedangkan inersia dipandang sebagai geometri ruangwaktu.
CRYSTAL STRUCTURE ANALYSIS OF CuCrO2 BASED ON XRD DATA USING GSAS SOFTWARE Didik, Lalu A.; Wahyudi, Muh.
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.v4i1.73

Abstract

The synthesis of CuCrO2 crystals by mixing CuO and Cr2O3 has been carried out using the solid reaction method at a temperature of 1200 0C. The characterization of the structure used XRD and analyzed using GSAS software. The results of characterization using XRD showed that no other phase occurred. This is evidenced by the absence of other phases from the results of refinement of measurement data with reference data and a value of χ 2 which is 1.222. The lattice parameter values resulting from the refinement of the CuCrO2 X-ray diffraction pattern are a = b = 2.9715 Å and c = 17.1104 Å with a cell volume of 130.584 Å 3. In addition to the lattice parameter values, the distance between atoms was also obtained, both Cu - O, Cr - Cr, and Cr - O.
PENGUKURAN LAJU ALIRAN UDARA DALAM PIPA SECARA SIMULTAN DENGAN TRANSDUSER GANDA ULTRASONIK Wiranata, Lalu Febrian
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.v4i1.75

Abstract

This paper aims to modification the transducer ultrasonic for measuring the distance to develop measure time of flight in the pipe with simultaneous method. To implement the application, we try to develop the microcontroller with one command transmitter and one command receiver in the same time, different from the conventional way, the transmitter and receiver work with consecutively. We try to reduce the delay time in two different transducers. In industrial, the symmetries profile must be ensured the profile always laminar. In this research, we try to use one path configuration. The result with the reference hot wire, we got the 27.76 percentage the difference of result. This is because the hot wire can measure the one path of flow in the one way of dot point.

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