cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Indonesian Physical Review
Contact Email
ipr.journal@unram.ac.id
Phone
-
Journal Mail Official
lilyangraini@unram.ac.id
Editorial Address
-
Location
Kota mataram,
Nusa tenggara barat
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.
Arjuna Subject : -
Articles 12 Documents
 1   2 
Search results for , issue "Vol. 7 No. 2 (2024)" : 12 Documents clear
DETERMINING THE RELATIONSHIP BETWEEN TEMPERATURE AND TUNING FORK FREQUENCY CHANGES WITH POLYNOMIAL REGRESSION MODELLING Hasan, Aly; Natalisanto, Adrianus Inu; Zarkasi, Ahmad
Indonesian Physical Review Vol. 7 No. 2 (2024)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v7i2.263

Abstract

A tuning fork is a unique tool made of metal and shaped like the letter U, with one handle. Tuning forks can produce specific frequencies; usually, the value is written on the handle. This study aims to investigate the relationship between temperature and changes in tuning fork frequency and model it using polynomial regression. This research uses laboratory experiments with tuning forks with 341.3 Hz, 426.5 Hz, and 512 Hz frequencies. The temperature on the tuning fork varies from 30C to 220C with a difference of 10C. From the results of the study adjusted R-Square values sequentially 0.94745, 0.99565, and 0.97721, which stated the relationship between temperature and frequency changes. The Adjusted R-Square value close to 1 means that changes in temperature on the tuning fork greatly influence changes in the frequency produced by the tuning fork, and the polynomial regression model used is very suitable.
DESIGN OF AN AUTOMATIC HANDWASHING TOOL USING INFRARED SENSOR BASED ON ARDUINO NANO IN PHYSICS DEPARTMENT OF SRIWIJAYA UNIVERSITY Annisa, Risa; Saleh, Khairul; Bahtiar, Muhammad Rizki; Rodzikin , Arifu Rahman Bastari
Indonesian Physical Review Vol. 7 No. 2 (2024)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v7i2.270

Abstract

The implementation of the New Normal forces people in Indonesia to be able to return to their activities outside the home, alongside the risk of the COVID19 outbreak. One of the health protocols that must be applied is hand washing, so that the use of automatic hand washing devices is very effective in use. The way this automatic hand washing tool works is simply pointing your hand near the sensor, the sensor will detect it. The Automatic Hand Washing Tool is designed using a sensor Infrared, Arduino nano, a module Relay, a water pump and a solenoid faucet. Where is the working principle when thesensor infrared detects an obstacle, it will send an input signal to arduino nano as a microcontroller center which is regulated through a program in the Arduino Ide software, then sends it to themodule relay as answitch on / off, When on it is, themodule relay will activate the solenoid faucet, if it is in thecondition off , the relay will deactivate the solenoid valve, while the pump is used for washing soapy water, where the automatic hand washing tool on water with soapy water is differentiated according to the respective distance that has been set on the arduino nano microcontroller.
FABRICATION OF THERMAL BIO-INSULATOR FROM OIL PALM TRUNK FIBER: ANALYSIS OF THERMAL, PHYSICAL AND MECHANICAL PROPERTIES Yana, Debi; Husna, Ropiqotul; Kusmawati, Intan; Ginting, Delovita; Syahputra, Romi Fadli; Taer, Erman
Indonesian Physical Review Vol. 7 No. 2 (2024)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v7i2.279

Abstract

The majority of air conditioning systems, including both cooling and heating systems, consume a significant amount of electrical energy as a result of their high electrical consumption and prolonged periods of operation. The use of thermal insulation materials in the building can help conserve electrical energy used for room conditioning systems. Natural fibers are used as an alternative in the production of thermal insulation, which is commonly referred to as bio-insulators. The utilization of oil palm trunk (OPT) fiber as the primary material for thermal insulation shows promise. This study aims to determine the specific attributes of OPT fiberboard that make it suitable for use as a thermal bio-insulator. The features examined encompass physical, mechanical, thermal, and fire-resistant attributes. The OPT fiber underwent a treatment process involving boiling at a temperature of 80℃ for a duration of 30 minutes. The fiberboard is manufactured using epoxy adhesive and calcium carbonate additive, and then printed using the hand lay-up process and cold-compaction technique. The physical characteristics of fiberboard indicate that there is a direct relationship between its density and water absorption.  Testing revealed that fiberboard has a low thermal conductivity and high heat capacity value. By including calcium carbonate, the burning time of the fiberboard was tested and seen to decrease, indicating a delay in the fiberboard burning process, as evidenced by the extended flame suppression time. The density of OPT fiberboard varies between 0.48 and 0.70 gr/cm3. The absorbency of water is inversely related to its density. Water absorption capacity generally rises with decreased density. The obtained heat capacity value is 1.28-2.38 J⁄(g℃). The mechanical value ranges from 1.00 to 3.55 MPa. The incorporation of calcium carbonate significantly impacts the thermal and mechanical characteristics of the fiberboard. The produced OPT fiberboard satisfies the requirements for good thermal, physical, and mechanical characteristics, making it a suitable bio-insulation material for buildings.
SPECTRUM AND TIME-FREQUENCY ANALYSIS TO CHARACTERIZE MICROTREMOR DATA IN SEPAKU SUB-DISTRICT, EAST KALIMANTAN Rahmania, Rahmania; Diantika, Diantika; Rasmid, Rasmid; Arisalwadi, Meidi; Sastrawan, Febrian Dedi
Indonesian Physical Review Vol. 7 No. 2 (2024)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v7i2.282

Abstract

Microtremor analysis has been done in the Sepaku Sub-District as a part of the New Capital City of Indonesia. This study aims to determine the characteristics of microtremors in the Sepaku Sub-District using Spectrum Analysis and Time-Frequency Analysis (TFA). Data in this study were taken using a seismometer on the 18 measurement points. The data were processed using default analysis from Geopsy software. Spectrum analysis and TFA used Fourier Transform to change time domain data into the frequency domain. Both analysis ways result in the characteristic microtremor data in the research area. The spectrum analysis data obtained shows two frequency ranges with maximum peaks: middle-frequency (5-8.8 Hz) and high-frequency (11.5-17.6 Hz). Afterward, the TFA shows similar results, where the characteristics of microtremor data are divided into two zones. The maximum peak occurs at the middle-frequency range of 5-10 Hz, and the high frequency ranges above 10 Hz
HYPOCENTER DISTRIBUTION ANALYSIS OF SINABUNG VOLCANO ERUPTION IN 2021 USING GEIGER'S WITH ADAPTIVE DAMPING (GAD) METHOD Arisalwadi, Meidi; Rahmania, Rahmania; Hamidah, Hamidah; Sastrawan, Febrian Dedi; Basuki, Ahmad
Indonesian Physical Review Vol. 7 No. 2 (2024)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v7i2.293

Abstract

Sinabung Volcano is located in the Karo Highlands, Karo Regency, North Sumatra, Indonesia, with a peak of 2460 meters above sea level. This volcano experienced an increase in volcanic activity in the April-October 2021 period, so it is necessary to analyse volcanic seismicity to determine the hypocenter distribution of the volcano. This study aims to determine the hypocenter distribution and classification of volcanic earthquake types based on seismogram recording data of Sinabung Volcano at four stations, namely LKW, BGR, MDD and SGR stations. The method used in this research is Geiger's method with adaptive damping (GAD) to determine the distribution of hypocenters. The results showed that the hypocenter distribution gathered below the crater centre with depths from 0.172 km to 7.139 km. The determination of the hypocenter distribution of volcanic earthquakes is expected to provide information on the depth of the earthquake to determine the movement of magma and the characteristics of events that occur during the pre-eruption process of Sinabung Volcano so that this data can be used for mitigation decision making when there is an increase in the activity of Sinabung Volcano.
THE EFFECT OF BARIUM SUBSTITUTION WITH COMBINATIONS OF RARE EARTH ON PERMANENT MAGNETIC SURFACE MORPHOLOGY BASED ON BARIUM HEXAFERRITE Adnyana, I Gusti Agung Putra; Suarbawa, Komang Ngurah; Nurmalasari, Ni Putu Yuni; Adi, Wisnu Ari
Indonesian Physical Review Vol. 7 No. 2 (2024)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v7i2.300

Abstract

The development of hard magnets today is progressing very rapidly. Developing hard magnets based on rare earth metals becomes a severe problem when the raw materials are not readily available. The chosen solution is to replace oxide-based permanent magnets with small amounts of rare earth metals substituted to improve their magnetic properties. This study synthesized a permanent magnet oxide based on barium hexaferrite doped with lanthanum and cerium atoms. In the synthesis of this material, a mechanical wet milling technique is used to obtain a single-phase permanent magnetic Ba1-β-γLaβCeγFe12O19 system with composition (β = 0 - 0.5 and γ = 0 - 0.1). The precursors are weighted according to their stoichiometric composition. Each mixed composition was milled by high energy milling (PW 1000 in the mixer/mill) at a milling speed of 1000 rpm using steel balls with an average diameter of 12 mm. Grinding conditions included a ball-to-powder weight ratio of 2:1, milling time 5 hours, then compacted with 7000 Psi pressure and sintered at 1200oC for 2 hours. The surface morphology and microstructure of the resulting sample particles were observed using scanning electron microscopy (SEM) with the SEM JEOL JED 305 brand. The characterization results show that the particles are hexagonally homogeneous in shape with particle sizes in the range of 1000-2000 nm for β = 0 and γ = 0 (without doping). In general, the four samples with varying concentrations of doping ions La3+ and Ce4+ showed homogeneous hexagonal structures but smaller particle sizes than pure barium hexaferrite. The sample particle sizes ranged from 500-1000 nm for β = 0.02 and 300-1000 nm for β = 0.04.
OPTIMIZING CIGS SOLAR CELL PERFORMANCE: THE IMPACT OF COUNTER ELECTRODE ON ELECTRODEPOSITION METHODS Rahmawati, Hilda; Ismail, Nurmalasari
Indonesian Physical Review Vol. 7 No. 2 (2024)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v7i2.301

Abstract

Copper Indium Gallium Selenium (CIGS) is a type of solar cell with great potential to be developed to meet increasing energy needs. Electrodeposition is the preferred technique for fabricating CIGS solar cells because it is simple, does not require vacuum equipment, and is low-cost. One factor influencing electrodeposition is the counter electrode, so in this research, CIGS will be fabricated using platinum wire and platinum plate as the counter electrode. Based on the XRD results of CIGS oriented at (112), (211), (220), and (312), the UV-Vis results show that the resulting CIGS has an absorbance peak of 390 nm. CIGS solar cell performance results based on photoresponse produce 0.99 s and 0.45 s when using platinum wire and plate consecutively. Both platinum wire and plate as counter electrodes in electrodeposition can produce CIGS solar cells. However, CIGS with a platinum plate as a counter electrode produces more optimal CIGS performance.
GEOLOGICAL EVALUATION OF STRUCTURAL DEFORMATION OF THE TAWAR FORMATION, ACEH TENGAH, INDONESIA Widiyani, Arrival Fadila; Gunawan, M. Ridho Gifaro; Tanzir, M.; Adhari, Muhammad Ridha
Indonesian Physical Review Vol. 7 No. 2 (2024)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v7i2.309

Abstract

Lake Lut Tawar, which is situated in Aceh Tengah, has a unique geological landscape, with the presence of rock formations of the Pre-Tertiary age (Tawar Formation) and its geological connection with the Sumatran fault and the Bukit Barisan mountains. Even though the geological condition of the Lut Tawar Lake has attracted the attention of many geologists to carry out various kinds of research, there is still a lot of geological understanding that is not yet known, especially regarding the Tawar Formation. Tawar Formation is of Pre-Tertiary age and can be found around Lut Tawar Lake, Aceh Tengah. This research targeted the Tawar Formation with two main objectives: (1) to evaluate structural deformation and geologic structures developed within the Tawar Formation and (2) to understand better the main factors influencing the evolution of the Tawar Formation. Integrated geological analyses, including structural geology analysis, scanline method, and stereo net method, were used to achieve the objectives of this research. Results from this study show that the Tawar Formation has experienced a complex structural deformation, evidenced by the presence of various geological structures such as multi-size and multi-episode fracture systems and numerous folds and faults. Furthermore, we interpret the evolution of the Tawar Formation to be strongly influenced by tectonic activity, possibly related to the movement of the Sibumasu plate, the Sumatran fault system, and plate subduction in the southwest part of Sumatra. It is expected that the results of this research will provide a new understanding of the history and evolution of the Tawar Formation and a better understanding of the deformation of rock structures that occurred in the Lut Tawar area, Aceh Tengah.  
SYNTHESIS AND CHARACTERIZATION OF NANOSILICA (SiO2) VOLCANIC ROCK OF MOUNT BATUR IN BALI Artha, I Komang Restu Widi; Mardana, Ida Bagus Putu; Arjana, I Gede
Indonesian Physical Review Vol. 7 No. 2 (2024)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v7i2.310

Abstract

This research was conducted to synthesize and characterize silica minerals (SiO2) from volcanic rocks in the active volcano in Bali, namely Mount Batur. The synthesis carried out on five different color variants of this rock sample is by the coprecipitation method which begins with the process of taking rock samples on Mount Batur, crushing the rock until it becomes powder with a size of 100 mesh, washing with distilled water and drying, immersing the rock powder in the solution. 2 M HCl for 12 hours, then the results of the soaking were reacted again with 7 M NaOH solution as a hydrolysis process to obtain pure SiO2 in the sample. In the form of sodium silicate precursor (Na2SiO3), the sample was titrated with a 2 M HCl solution to obtain silica gel which was then washed and dried until amorphous silica powder was produced. The results of the XRF analysis showed that the SiO2 mineral content in the sample after going through the synthesis process was 94.9% and the Si element was 89.9%. The XRD characterization results show that the phase formed from the sample has a quartz structure with the highest peak at an angle of 2θ = 23.07o, then decreases and levels out at an angle of 2θ = 32.94o which is characteristic of an amorphous structure and with a silica grain size of 8.47 nm – 8.65 nm.
SYNTHESIS AND CHARACTERIZATION OF ACTIVATED CARBON PREPARED FROM RICE HUSK BY PHYSICS-CHEMICAL ACTIVATION Suyoga Wiguna, Anak Agung Gde; Mardana, Ida Bagus Putu; Artawan, Putu
Indonesian Physical Review Vol. 7 No. 2 (2024)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v7i2.311

Abstract

Activated carbon is an amorphous carbon material predominantly composed of free carbon atoms with high adsorption capacity. The amorphous structure in activated carbon affects its adsorption capacity; the higher the percentage of amorphous carbon, the greater the adsorption capacity of the activated carbon. Activated carbon can be obtained from rice husk waste containing 30-40% C in cellulose, hemicellulose, and lignin. Therefore, this study was conducted to observe activated carbon's phases, morphology, elemental composition, and particle size. Activated carbon was synthesized using a physics-chemical activation method, which began with washing the rice husk samples, followed by air drying, carbonizing into charcoal, and grinding it finely. The rice husk charcoal powder was then physically activated at a temperature of 500℃. The physically activated product was then chemically activated using 6M HCl with a charcoal-to-activator ratio of 1:10 (m/V), stirred at 250 rpm for 1 hour, and then allowed to settle for 24 hours. It was then washed and dried to produce activated carbon powder. XRD test results showed diffraction peaks at 2θ = 22.23° without sharp or pointed peaks, indicating that the activated carbon has an amorphous structure. SEM test results showed the morphology of rice husk-activated carbon with spherical particle shapes and a particle size distribution of 20-70 nm. EDX test results showed that the rice husk activated carbon is predominantly composed of C, O, and Si with respective percentages of 54.31%, 40.04%, and 2.49%.  

Page 1 of 2 | Total Record : 12

 1   2 

Filter by Year

2024 2024


Reset
Filter By Issues
All Issue Vol. 9 No. 1 (2026) Vol. 8 No. 3 (2025) Vol. 8 No. 2 (2025) Vol. 8 No. 1 (2025) Vol. 7 No. 3 (2024) Vol. 7 No. 2 (2024) Vol. 7 No. 1 (2024) Vol. 6 No. 3 (2023) Vol. 6 No. 2 (2023) Vol. 6 No. 1 (2023) Vol. 5 No. 3 (2022) Vol. 5 No. 2 (2022) Vol. 5 No. 1 (2022) Vol. 4 No. 3 (2021) Vol. 4 No. 2 (2021) Vol. 4 No. 1 (2021) Vol. 3 No. 3 (2020) Vol. 3 No. 2 (2020) Vol. 3 No. 1 (2020) Vol. 2 No. 3 (2019) Vol. 2 No. 2 (2019) Vol 2, No 1 (2019) Vol. 1 No. 1 (2018) More Issue