JPSE (Journal of Physical Science and Engineering)
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).
Articles
99 Documents
<![CDATA[The Virtual Lock-in Amplifiers - Accuracy of Measurement Results in Light Transmission Experiments ]]>
<![CDATA[Lintang Ratri Prastika]]>;
<![CDATA[Lili Indarti]]>;
<![CDATA[Hendro Hendro]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 6, No 1 (2021): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[This research focuses on the analysis of the measurement result of the virtual lock-in amplifier (virtual-LIA) in the light transmission experiment as the trial step of developing the virtual-LIA. The virtual-LIA used in this research is designed by using the Vernier sensor DAQ as the data acquisition and the LabVIEW as the programming media. The design of virtual-LIA is based on the mathematical operations of LIA. The type of virtual-LIA is a single phase with the capabilities to process the external reference signal. Light transmission experiments are carried out using formazin polymer suspension with turbidity level of 3000 NTU, 3500 NTU, and 4000 NTU as the medium in which light is passed. The accuracy of the measurement results is known by comparing the results of virtual-LIA with real-LIA SR510. The experiments are also carried out in bright and darkroom conditions to determine the ability of virtual-LIA in reducing noise signals. Based on the experiment, the results obtained that the measurement accuracy of the virtual-LIA developed is above 94% compared to the LIA SR510. Virtual-LIA could measure small signals with and without noise with the average percentage of differences measured between dark and bright conditions is 0.54%.DOI: 10.17977/um024v6i12021p001]]>
<![CDATA[Digital Simulation as Learning Aid for Heat Flow in Solid Theoretical Understanding ]]>
<![CDATA[Inge Magdalena Sutjahja]]>;
<![CDATA[Sufiyah Assegaf]]>;
<![CDATA[Surjamanto Wonorahardjo]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 5, No 1 (2020): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[Understanding the physical phenomena is extremely aided by digital simulations for understanding physical phenomena that occur, especially for students in the digital era and in this new-normal period. This paper describes heat conduction in solids using the Energy2D program, starting from general formulations for heat conduction from conductors to general solids that show the mechanism of heat conduction as a diffusion process. The thermal diffusivity parameter determines heat diffusion as the ratio between thermal conductivity and multiplication between density and thermal capacity. From the practical side, heat conduction is ordinary using thermal resistance (R-value) that combines the dimensions of the material in the direction of heat flow and thermal conductivity. By taking an analogy with Ohm's law for electrical circuits, it can be determined the equivalent resistance of several thermal resistance of the material that is composed in series or parallel. A good understanding of the heat transport process in buildings is needed for the development of technologies required for the comfort of human life and energy conservation. DOI: http://dx.doi.org/10.17977/um024v5i12020p011]]>
<![CDATA[Synthesis and Characterization of Magnesium Acetate Doped MAPbI3 Perovskite Solar Cells with Carbon Electrodes ]]>
<![CDATA[Deris Afdal Yusra]]>;
<![CDATA[Nandang Mufti]]>;
<![CDATA[Eny Latifah]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 6, No 2 (2021): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[The organometal perovskite trihalide (MAPbI3) based solar cell has attracted the attention of many researchers because it has the potential to be a third-generation solar cell that has high efficiency, flexibility and transparency. However, this perovskite solar cell is sensitive to the environment and less stable. In this study, a performance study of perovskite solar cells with the addition of magnesium acetate was carried out in the MAPbI3 synthesis process and the use of carbon electrodes. In general, the perovskite solar cell arrangement in this study consisted of ITO/TiO2 mp/MAPbI3/carbon paste. Mesoporous TiO2 (mp) coating was carried out using the screen printing method, while MAPbI3 coating was carried out with a two-stage spin coating with the addition of magnesium acetate after PbI2 coating in the first stage. The samples obtained were then characterized using an X-Ray Diffractometer (XRD). Analysis of the performance of solar cells was carried out by measuring I-V and photoresponses using a solar simulator. XRD results show that MAPbI3 film has been formed even though there is still impurity of PbI2. The resulting solar cell performance has a value of Voc equals 3.45 V and Jsc equals 0.04 with an efficiency of around 0.09 per cent. In the measurement of the response photo, the increase in time value was 7.29 s and the decay time was 34.38 s. The low-efficiency value is probably due to the absence of a layer of hole transfer materials (HTM) and the presence of PbI2 impurities. However, the stability of the photoresponse pattern against time has shown quite good results even though the response is increased or the decay is slow.DOI: 10.17977/um024v6i22021p040]]>
<![CDATA[A Study of Palladium-Nickel Catalyst for Direct Synthesis of Hydrogen Peroxide: A DFT Approach ]]>
<![CDATA[Mawan Nugraha]]>;
<![CDATA[Susiani Pupon]]>;
<![CDATA[Nofiandri Setyasmara]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 5, No 2 (2020): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[Hydrogen peroxide is an important material for bleaching agent in paper production related to the low price and environmentally friendly chemical. The current production of H2O2 is well-known as indirect synthesis, which uses danger anthraquinone. The synthesis was improved by using the direct reaction of H2 and O2 on Pd or PdAu alloy's catalyst surface and has been known as direct synthesis. The current catalyst used is Pd-Au, but it has limited availability in nature. Therefore we need the alternative of Pd-Au. We investigated Ni alloyed with Pd for the new H2O2 direct synthesis catalyst using a density functional theory approach. We selected the O adsorption to screen the catalysts and compared the species adsorption trend on the surfaces of PdNi and the proven catalysts such as Pd, PdAu, and PdHg. Since the trend of O adsorption on the PdAu and PdNi is similar, it can be concluded that the catalytic selectivity of PdNi equal with PdAu. Further, the stability of PdNi alloy was explored by calculating the binding and compared it with Pd, which leads to the conclusion that PdNi can be a good catalyst for H2O2 synthesis.DOI: http://dx.doi.org/10.17977/um024v5i22020p046]]>
<![CDATA[Reduced Graphene Oxide/Polyvinyl Alcohol Nanofibers Fabricated by Electrospinning Technique as An Ideal Candidate for Organic Solar Cell Devices ]]>
<![CDATA[Asriani Asriani]]>;
<![CDATA[Iman Santoso]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 6, No 1 (2021): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[Functionalization of rGO that previously obtained by chemical reduction using hydrazine hydrate, has been done by changing its morphology into nanofiber with electrospinning technique and using PVA as a polymer matrix. The rGO nanofibers that had been formed were then characterized using Fourier Transformation-Infra Red (FTIR) spectroscopy, Scanning Electron Microscopy (SEM), and UV-Vis Spectrophotometer. FTIR spectroscopy confirmed the presence of C – C group and C = O group in nanofibers. SEM showed the change of nanofibers morphology which is marked by the increasing of fibres diameter and the hollow fibres become brighter. Furthermore, the effect of rGO concentration to nanofiber optical properties was confirmed by UV-Vis spectrophotometer. According to this characterization, the absorbance of rGO/PVA nanofiber is decreased due to increased rGO concentration. The detail of optical properties of rGO is studied through complex refractive index and dielectric constant in which Kramers-Kronig transformation is then employed to calculate complex refractive index and complex dielectric constant. From the data, the optical properties of rGO/PVA nanofibers indicating that rGO/PVA nanofibers can be applied as transparent electrode an organic solar cell devices.DOI: 10.17977/um024v6i12021p010]]>
<![CDATA[Forecasting Solar Activities based on Sunspot Number Using Support Vector Regression (SVR) ]]>
<![CDATA[Suwanto Suwanto]]>;
<![CDATA[Dian Candra Rini Novitasari]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 5, No 1 (2020): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[Progress on the 4.0 industrial revolution was the most significant is the entire computer and robot is connected to the internet connection. Satellites as one of the internet network transmitters have the threat of destruction if a solar storm occurs. The size of the activity that is on the sun can be known by observing sunspots. Solar activity in the future is known by forecasting sunspot numbers. This research will forecast sunspot numbers using support vector regression (SVR), its aimed to minimized adverse effects on the earth as an outcome of solar storms. The best SVR results on forecast sunspot numbers are on annual sunspot number obtained using RBF kernel. Measurement results from MSE, RMSE, and MAAPE respectively by 35.32, 5.94, and 0.12. Forecasting concluded accurately based on MAAPE value, on 2020 and 2021 indicated potentially flare because the result of forecasting sunspot numbers is more than twenty. DOI: http://dx.doi.org/10.17977/um024v5i12020p006]]>
<![CDATA[The Effects of Potentiostat Scan Rate Variation on Impedance Value, Topography, and Morphology of the Polyaniline Thin Film ]]>
<![CDATA[Iqomatus Sa'diyah]]>;
<![CDATA[Nugrahani Primary Putri]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 6, No 2 (2021): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[The effects of potentiostat scan rate on the impedance, topography, and morphology of the Polyaniline (PANi) thin film has observed in this study. PANi has deposited on the Quartz Crystal Microbalance (QCM) surface with various scan rates, and changes in the impedance value have observed through an impedance analyzer test. Topography Measurement System (TMS) has observed the layer topography, while the layer morphology has observed using optical microscopy and Scanning Electron Microscope (SEM). The results have shown that the best sample has a scan rate of 10 mV/s, with a low impedance value indicating the layer has rigid. The variation in scan rate can affect the impedance value, but it is not significant and does not indicate a damping effect on QCM. A homogeneous layer is deposited at a low scan rate from topography and morphological observations, while a high scan rate results in an inhomogeneous layer.DOI: 10.17977/um024v6i22021p046]]>
<![CDATA[The Design of A Telegram IoT-based Chicken Coop Monitoring and Controlling System ]]>
<![CDATA[Prasetyo Adinegoro]]>;
<![CDATA[Muhammad Hisyam Habbani]]>;
<![CDATA[Robiatul Akhlakul Karimah]]>;
<![CDATA[Yoyok Adisetio Laksono]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 5, No 2 (2020): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[Less ideal chicken coop condition is one reason for the low productivity of chickens in Indonesia. Based on this condition, breeders need monitoring and control devices that can be used easily anywhere and anytime. In this study, the monitoring and control devices based on the Internet of Things (IoT) were successfully designed using the ESP8266 microcontroller. The monitoring system used a DHT11 temperature sensor while the controller used a bulb and fan as the actuator. Monitoring data and control commands were displayed via Telegram. Coop testing was carried out with three different treatments-the light was on, the fan was on, and both were on-resulting in temperature and humidity measurement data ranging from 24–32 ºC and 61–78%, respectively. Therefore, this monitoring and control device can prevent the conditions of the chicken coop that are ideal less so that chickens' productivity increases.DOI: http://dx.doi.org/10.17977/um024v5i22020p056]]>
<![CDATA[Hydrocarbon Mapping on Reservoir Carbonate Using AVO Inversion Method ]]>
<![CDATA[Dendy Setyawan]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 6, No 1 (2021): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[Amplitude Versus Offset (AVO) inversion has been applied for reservoir analysis focused on the horizon carbonate Peutu and Belumai. Simultaneous inversion analysis is used to determine gas anomaly inside carbonate-rocks and it’s spread laterally around target zones. It is based on the fact that small Vp and Vs value changes are going to show the better anomaly to identify reservoir fluid content. The AVO inversion method applies angle gather data as the input and then it is inverted to produce P impedance (Zp) and S impedance (Zs). Zp and Zs are derived to produce Lambda-Rho and Mu-Rho that are sensitive to fluid and lithology. Value of Mu-Rho between 44–65 Gpa gr/cc while value of Lambda-Rho smaller than 10 Gpa gr/cc (for carbonate-rock filled by fluid). This research found that Lambda-Rho is the best parameter to show the existence of hydrocarbon in the case of gas. While Mu-Rho is the best parameter to show the differences in lithology.DOI: 10.17977/um024v6i12021p019]]>
<![CDATA[Distance Variation of Light Source Effects toward Dye Sensitized Solar Cell (DSSC) Performance using Anthocyanin Extract from Rosella Flower ]]>
<![CDATA[Rafika Andari]]>
<![CDATA[ JPSE (Journal of Physical Science and Engineering) Vol 5, No 1 (2020): JPSE (Journal of Physical Science and Engineering) ]]>
Publisher : <![CDATA[Universitas Negeri Malang ]]>
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<![CDATA[This study aims to determine the characteristics of DSSC using rosella flower extracts with variations in the distance of the light source to DSSC. The characteristics measured are current and voltage values and cell efficiency. A 150-watt halogen lamp is used as the light source. Light source was placed at a distance of 10 cm, 20 cm, and 30 cm. The voltage and current value of the halogen lamp with a distance of 10 cm to DSSC are greater than the distance of 20 cm and 30 cm. The test results show that the cell efficiency of 10 cm to DSSC is the most maximum with current (Imax) of 0.08 mA, maximum voltage (Vmax) of 306.7 mV and the efficiency of 0.046%. The smaller the distance of the halogen lamp to DSSC increases the intensity of the light so that the greater the DSSC output value. DOI: http://dx.doi.org/10.17977/um024v5i12020p031]]>
