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JPSE (Journal of Physical Science and Engineering)
Published by Universitas Negeri Malang
ISSN : 25412485     EISSN : 25412485     DOI : -
Core Subject : Science, Engineering,
Astronomy Electrical & Electronics Engineering Materials Science & Nanotechnology Physics
JPSE (Journal of Physical Science and Engineering) is published twice a year in April and October by Physics Department of Universitas Negeri Malang, Indonesia. e-ISSN: 2541-2485 The journal is devoted to publishing original, frontier and important of various branches of Physics Science and Engineering. Editors welcome scholars, researchers and practitioners of Physics around the world to submit scholarly articles to be published through this journal (free of charge).
Arjuna Subject : -
Articles 99 Documents
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Comparative Study on Mechanical Properties of Waste Composite Materials for Bricks Application Siswanti Zuraida; Andrie Harmaji; Sastita Pratiwi; Xevna De Elshinta Arellsya Ruitan; Astrid Nadya Anggraini; Yudea Sisti Kurniadevi; Bart Julien Dewancker
JPSE (Journal of Physical Science and Engineering) Vol 7, No 2 (2022): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

This study discusses mechanical properties and analysis of composite materials to develop building bricks for structural lightweight concrete replacement applications made from three different waste materials, i.e. sawdust, polyethylene terephthalate (PET) plastic bottle, and used diaper. All waste materials are used to mixture composite, as cement replacement, with a mixture of 0, 5, 10, 15, and 20 percent of the total weight. This study uses a quantitative method with the sample used as cylindrical tube with 20 mm of diameter and 40 mm of height. Tests were carried out in the form of compressive and specific gravity tests to determine the mechanical and physical properties of the composite material. The use of waste materials as mixtures for composite manufacture with a water per cement ratio of 0.4 at the age of 28 days results in the best compressive strength of 20.70 MPa (5 percent of sawdust), 33.04 MPa (5 percent of PET), and 18.05 MPa (5 percent of used diaper). The density value shows that the addition of waste materials tends to decrease the weight of the composite result. Based on these results, it can be concluded that the use of waste composite materials is a potential replacement for lightweight structural concrete as an effort to reduce the cement requirement for building material applications.DOI: 10.17977/um024v7i22022p092
Effect of PbS Thin Film Thickness with Cu-Doping on Thermoelectric Properties Using Spin Coating Method Reza Akbar Pahlevi; Hari Rahmadani; Markus Diantoro
JPSE (Journal of Physical Science and Engineering) Vol 7, No 2 (2022): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

A thermoelectric device is produced from several materials that can convert heat into electrical energy or vice versa by generating the Seebeck effect and the Peltier effect. Then the energy can be formed from a heat source. This research used copper monosulfide (CuS) and lead monosulfide (PbS) as the primary materials for thermoelectric manufacture in the form of films. The method used in this research is a spin coating. This method uses the procedure of making a thin film on the substrate. The choice of this material is because CuS and PbS have high electrical conductivity and low thermal conductivity, so the value figure of merit (ZT) is high. From the thin film produced, an annealing process will be carried out to remove unwanted elements. After the sample is finished, the electrical conductivity test will be carried out with four probes, x-ray diffraction (XRD), and scanning electron microscopy (SEM). The four probes' conductivity test characterization results for one-layer, two-layers, and three-layers variations are 27.4 S/m, 53.6 S/m, and 106.8 S/m, respectively. From the SEM results, the grain size obtained from one-layer, two-layers, and three-layers variations are 227.9 nm, 397.8 nm, and 269.6 nm, respectively. Based on the XRD results, the crystal size obtained for variations of one-layer, two-layers, and three-layers has a size of 43.65 nm, 43.55 nm, and 43.60 nm, respectively. Furthermore, the lattice parameter has the same value from each sample variation, which is 5.93 Å.DOI: 10.17977/um024v7i22022p062
Hydrogenated Amorphous Silicon Density of State Analyzed by Dielectric Function Model Derived from Ellipsometric Spectroscopy Soni Prayogi; Yoyok Cahyono; Darminto Darminto
JPSE (Journal of Physical Science and Engineering) Vol 7, No 2 (2022): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

In this study, we report the application of a functional dielectric model of scalable ellipsometric spectroscopy to investigate the optical response of materials in the optical spectrum modeling of hydrogenated amorphous silicon. ES is used to obtain the dielectric constant of the data fitting experimental. Then ψ and Δ are obtained from the analysis of the experimental comparison of the valence band and the conduction band state density with the band structure theory for a-Si: H. The analysis results are that for a-Si: H, the density of state model for all electronic transitions is obtained, whose results are consistent with experimental data from ES measurements over the entire photon energy range of 0.5–6.5 eV. Our results demonstrate the high-energy excitons and plasmons for the performance of photovoltaic devices in a-Si: H. Overall, we believe our methodology can study in detail about electron and hole interactions in semiconductors.DOI: 10.17977/um024v7i22022p068
Detection of Lahar Flow Direction from Semeru Eruption on 4 December 2021 using Gravity Method Arie Realita; Muhammad Nurul Fahmi; Tjipto Prastowo; Madlazim Madlazim
JPSE (Journal of Physical Science and Engineering) Vol 7, No 2 (2022): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

Mount Semeru, an active, steep-sided volcano in East Java, erupted on 4 December 2021 following extreme rainfall that led to an avalanche of hot pyroclastic flows and lahars. Besides a debatable eruption source with no preceding seismic signals observed, it has drawn the international community's attention for its extent of largely impacted areas down the summit. In this study, we used gravity method modeling of the local anomaly in density distribution after the event to determine the unique pattern of the lahar flow direction with the corresponding extent and the spread of the flow. The data were collected from a TOPEX satellite altimeter and processed using a number of specific techniques to obtain a contoured map of local anomaly. The results showed that the main path of the flow was found to descend down the slope to the southeast of the crater, extending to a distance of about 20 km with a maximum lahar flow width of about 2 km toward agricultural lands and populated areas, consistent with the high-resolution satellite imagery produced by UNOSAT-UNITAR. It suggests that gravity anomaly could be used to simulate the flow pattern and the widespread damage of volcanic materials after an eruption.DOI: 10.17977/um024v7i22022p075
Implementation of Line of Sight Algorithm Design Using Quadcopter on Square Tracking Anggara Trisna Nugraha; Dimas Rinaldi; Muhammad Syahid Messiah; Muhammad Jafar Shiddiq; Moch Fadhil Ramadhan; Fortunaviaza Habib Ainudin
JPSE (Journal of Physical Science and Engineering) Vol 7, No 2 (2022): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

The improvement of the quadcopter has extended its function, even for risky army tasks, i.e., search, reconnaissance, and rescue operations. The quadcopter also can be implemented for medical tasks, such as mapping wind velocity conditions, detecting radiation sources, surveillance, and upkeep and surveys. A quadcopter is a non-linear machine with more than one enter and output and a machine with balance problems. It is simply prone to outside disturbance. This function reasons a few problems in controlling the monitoring motion and adjusting the dealing with the path automatically. Based on those problems, this looks like the monitoring manipulated layout within the horizontal place with the aid of including the line of sight's set of rules. So, that direction following converges closer to 0 and may conquer the disturbance of ocean currents that extrude the parameters of the quadcopter in shifting at the horizontal place. The controller benefit is acquired using the numerical iterative of the Linear Matrix Inequality (LMI) technique. Meanwhile, Command-Generator Tracker (CGT) controls the monitoring function at the x and y. The simulation effects display that the manipulation technique can deliver the yaw, pitch, and roll to the anticipated values on a rectangular track.DOI: 10.17977/um024v7i22022p099
Oxygen Gas Vacuum Plasma Treatment on PVA/Chitosan/HAp Scaffold Nanofiber Hartatiek Hartatiek; Nada Shofura Faradyana; Maulia Ingganis Wuriantika; Yudyanto Yudyanto; Muhammad Nurhuda; Masruroh Masruroh; Dionysius Joseph Djoko Herry Santjojo; Norhayati Ahmad
JPSE (Journal of Physical Science and Engineering) Vol 7, No 2 (2022): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

Scaffold in the form of nanofibers in bone tissue engineering applications continues to be developed. In this study, nanofibers are composed of PVA/CS/HAp with characteristics that can support medical applications such as bone tissue engineering. Vacuum plasma treatment was carried out to modify the nanofiber surface. The results of the morphological analysis showed that the vacuum plasma treatment of oxygen gas caused the surface of the PVA/CS/HAp nanofibers to become rougher with a change in diameter. Before the oxygen gas vacuum plasma treatment, the diameter of the nanofiber had a range of 83–365 nm. After the oxygen gas vacuum plasma treatment, the diameter had a size range of 105–293 nm. Furthermore, the vacuum plasma treatment carried out showed increased hydrophilic properties. The average contact angle values before and after oxygen gas vacuum plasma treatment were (39.0 ± 0.0005)° and (10.3 ± 0.0005)°, respectively.DOI: 10.17977/um024v7i22022p108
Physical and Chemical Characterization of Manalagi Apple (Malus sylvestris Mill) Leather Enriched with Either Mango, Pineapple or Dragon Fruit Mokhamad Nur; Siti Sulaihah; Mohd Zuhair Mohd Nor
JPSE (Journal of Physical Science and Engineering) Vol 7, No 2 (2022): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

Manalagi apple leather can be an innovation for new processed products made from fruit pulp and undergo a drying process. The main problem is that apple leather has a less plastic texture, non-variative color and taste, and stickiness. For this reason, in this study other fruits were added in certain proportions and food additives such as arabic gum and maltodextrin to improve the physicochemical and organoleptic characteristics of manalagi apple leathers. This study used the Split-split Plot Design method with three factors. Factor I is a type of fruit (red dragon fruit, pineapple, mango), factor II is the variation in proportion ((25:75) percent, (50:50) percent, (75:25) percent), factor III is maltodextrin concentration (5, 10, and 15 percent). The best treatment was taken from each type of fruit substitution, so there were 3 the best treatment: apple leather 1) enriched with 50 percent dragon fruit and 10 percent maltodextrin, 2) enriched with 75 percent pineapple and 10 percent maltodextrin, and 3) enriched with 75 percent mango and 10 percent maltodextrin.DOI: 10.17977/um024v7i22022p116
Analysis of Phase and Energy Band Gap Width of Corncob Carbon-PEG 4000 Kusuma Wardhani Mas'udah; Darminto Darminto
JPSE (Journal of Physical Science and Engineering) Vol 7, No 2 (2022): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

This study aims to identify and analyze the band gap width of the carbon phase produced from corncobs mixed with PEG-4000 to see the surface area of the corncob carbon phase. First, the characterization test was carried out using Scanning Electron Microscope Energy-Dispersive X-ray (SEM-EDX) spectroscopy to determine the morphology and Ultraviolet–Visible (UV-Vis) spectroscopy to determine the band gap width of corncob carbon. Then, adding Polyethylene Glycol (PEG) 4000 at a specific concentration to develop the potential of corncob carbon. Finally, the corncob-PEG 4000 carbon reduction process was sifted through and tested by UV-Vis spectroscopy, and the energy gap value was 0.954 eV.DOI: 10.17977/um024v7i22022p142
Performance Comparison of a Rhodamine B Concentration Sensor in Distilled Water Using a Fiber Coupler and Fiber Bundle as a Probe without Direct Contact with the Sample Samian Samian; Supadi Supadi; Alifiah Qodartin Nisa Budiharjo; Patricia Patricia; Mirna Putri Anggraeni
JPSE (Journal of Physical Science and Engineering) Vol 7, No 2 (2022): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

Detection of the concentration of rhodamine B in distilled water using a fiber coupler and fiber bundle as probes with a static position on the sample surface and not in direct contact with the sample was successfully carried out. The working mechanism of the sensor uses the principle of sample absorption of the light that passes through it. The concave mirror functions as a reflector and a sample container, allowing an undirect contact probe sensor with the sample. Both types of sensors show similar performance. The best detection is shown by sensors that use fiber bundles as probes. The resulting sensitivity and resolution are 2.1 mV/ppm and 0.29 ppm, respectively.DOI: 10.17977/um024v7i22022p127
Physical and Mechanical Properties of Fiber Board from Corn Husk Fiber Rita Desiasni; Fauzi Widyawati; Yuliana Fitri Sersaningsih; Syamsul Bahtiar; Amirin Kusmiran
JPSE (Journal of Physical Science and Engineering) Vol 7, No 2 (2022): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

Using agricultural waste materials, namely corn husk fiber (CHF), to reduce agricultural waste and recycle corn husk waste into sustainable engineering materials is relatively significant due to the decreasing number of woods. This study aims to analyze the effect of the volume fraction of CHF with polyester (PE) on the physical and mechanical strength of fiberboard composites with variations in volume fraction of 25  percent fiber : 75 percent PE, 50 percent fiber : 50 percent PE, and 75 percent fiber : 25 percent PE. Composites are made by the hand layup method. Fibers were pretreated by immersing 5 percent NaOH for 2 hours. The results of testing the physical properties of the highest density composite board at a volume fraction of 25 percent fiber : 75 percent PE of 0.85 g/cm³ and the lowest moisture absorption value was at 0.49 percent. The results of the mechanical board test in the form of the modulus of elasticity (MOE) test got the highest test value at the fiber volume fraction 25 percent fiber : 75 percent PE, which was 1179.2 MPa as well as the highest modulus of rupture (MOR) test value was found in the volume fraction 25 percent fiber: 75 percent PE that is equal to 9.4 MPa. Based on this result research, the average strength of the mechanical properties increases with the increase in the number of matrices. That indicates a reasonably good bond between the fiber and the matrix. The results of the water content test also increased as the density value increased.DOI: 10.17977/um024v7i22022p134

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