bluuebunny/crossref_metadata_2025_split huggingface dataset:
Potential of UAV Application for Forest Fire Detection
Authors: Muid A , Kane H , Sarasawita I K A , Evita M , Aminah N S , Budiman M , Djamal M 
Published: June 2022

Abstract
Improved ground and aerial system technologies enable mapping and monitoring forests and land to mitigate forest fires. UAV plays a role in monitoring by collecting forest area images from the air, which could be processed into 2D and 3D images. They can be analyzed to identify land cover types and objects in forest areas. This image data collection uses the DJI Phantom 4 Pro UAV controlled automatically with a flight plan made with Pix4D Capture, which is then processed using Agisoft. The result of the mapping has an average GSD of 2,03 cm/px. The mapping result shows that the 3D image produced can show objects in various land cover types. Weather related parameters were measured using ground sensors both in forest and plain area. We had successfully gathered forest and plain area images in addition to weather related parameters in Tangkuban Perahu Mountain area.
Sound Absorption Characterisation of Layered Arrangements of Pineapple Leaf Fiber-Epoxy Composite prepared by a Simple Mixing – Hot Pressing Process
Authors: Widayani  , Noeriman A , Wungu T D K , Adhika D R 
Published: June 2022

Abstract
As with other natural fiber-based composites, pineapple leaf fiber-epoxy composites could be potentially used as sound absorber materials. Sound absorption coefficient of a material depends on several factors, such as thickness and sound frequency. Layered arrangement is usually used to increase thickness. In this research, sound absorption characteristic of one-, two- and three-layer arrangement of the Pineapple leaf fiber-epoxy composite containing 11 and 17% (w/w) of epoxy concentration have been studied. The composites were prepared by a simple mixing followed by hot pressing process, and the sound absorption coefficient was measured according to ISO 10534-2 by using an impedance tube. At low frequency range (<1 kHz) the sound absorption coefficient increases as the layer number increases. At frequency range >1 kHz, the sound absorption coefficient variates at above 0.6. In this frequency range, the sound absorption coefficient of Pineapple Leaf fiber-epoxy composite is influenced by epoxy concentration. The composite containing 11% of epoxy concentration gives higher sound absorption coefficient compared to that of 17%. One-layer composite is better sound absorbing materials at frequency >3 kHz, as it gives higher sound absorption coefficient compared to other arrangements.
Integrated Array of Dye-Sensitized Solar Cells and Supercapacitor for Photo-Supercapacitor Multifunctional Harvesting Device
Authors: Diantoro Markus , Ittikhad Akhmad Al , Albadi’ah Ida Vaeruza , Latifah Eny , Taufiq Ahmad , Meevasana Worawat 
Published: June 2022

Abstract
Photo-supercapacitor (PSc) was an integration of photovoltaic as a device for harvesting light energy and supercapacitor as an energy storage device. Multifunctional harvesting device has increasing demand in the green energy industry sector. In this study, we demonstrate the integrated array of photovoltaic type dye-sensitized solar cells and carbon-based supercapacitors. The photo-supercapacitor integration will be arranged in a different arrangement, called series and parallel arrangement. DSSC photoanode was used TiO2material that deposited using screen printing method on FTO substrate. Activated Carbon/Carbon Black/SBR as a material composite of the electrode was deposited on the aluminium foil substrate using dr. blade technique. XRD characterization has identified the TiO2anatase. The morphology of mesoporous TiO2 and Ti element has been identified by SEM characterization and EDX of 64.30 wt%. The UV-Vis spectroscopy curve has identified the absorbance in the wavelength range of 200 – 900 nm and the absorbance area of 914.58. The J-V characterization shows that TiO2 photoanode has a efficiency of 2.15 %. The Charge-Discharge shows that AC/CB/SBR performance has capacitance specific of 61.33 F/g. The l–-V characterization of photo-supercapacitor performance was arranged by series has voltage higher than parallel arrangement, because it produces a larger voltage (Vop
).
Lithium doping effect on microstructural and electrical properties of zinc oxide thin film grown by metal-organic chemical vapor deposition
Authors: Mustajab M A , Winata T , Arifin P 
Published: June 2022

Abstract
In this study, the undoped and Li-doped ZnO thin films were grown on Si(100) substrate using metal-organic chemical vapor deposition (MOCVD). Zinc acetylacetonate hydrate and lithium acetylacetonate solution were used as ZnO thin film precursor and Li dopant source. The effect of lithium doping on microstructural was characterized using a scanning electron microscope (SEM) and X-ray diffractometer (XRD). XRD diffractogram analysis shows that undoped and Li-doped ZnO thin films have polycrystalline hexagonal wurtzite structures with preferred peak crystal orientation (103). Li doping slightly changes the lattice parameters and cell volume of ZnO thin films through the increase of crystallite size and slightly affects the surface morphology of ZnO thin films. Current-voltage (I-V) measurement and four-point probe method were used to measure the electrical properties of lithium doped ZnO thin films. The electrical conductivity of ZnO thin films increases as Li doping is given compared to undoped films. These results are also supported by the I-V curve of Li-doped ZnO thin films by having a higher slope, indicating improvement in electrical properties.
Comparative Evaluation on Nuclear Shell Correction Calculation using Regulation Bayesian and Moving Average Methods
Authors: Kurniadi Rizal 
Published: June 2022

Abstract
Since Strutinsky had proposed a shell correction for nuclear mass calculations in 1967, there has been much further research on this topic. In addition to the development carried out on the Strutinsky method, some studies try to apply the shell correction. This paper is included in the development of the shell correction method. There are two techniques used in this work the first is the average method, while the second is the Bayesian regulation method. The two techniques are very different from those Strutinsky originally developed. He used the hermit polynomial as an extension of delta Dirac. This paper will show a comparative study of the two alternative techniques for calculating shell correction.
Parametric Study of Thorium Fuel Utilization on Small Modular Pressurized Water Reactors (PWR)
Authors: Lapanporo B P , Su’ud Z 
Published: June 2022

Abstract
Small Modular Pressurized Water Reactor (PWR) can be used to overcome the problem of electricity shortages in remote areas with fewer populations. These reactors usually use uranium-based fuel. Currently, the use of thorium-based fuels for this type of reactor has received constant attention, leading to several investigations of fuel performance. This study aims to determine the performance of thorium-based fuel in the PWR core at a power level of 300 MWt. The analysis was carried out by varying the percentage of U-233 as fissile material in Thorium (Th-233U)O2 fuel by 3%-8% and Pa-231 variation as burnable poison 0.2%-5%. In addition, analysis of changes in the volume fraction of fuel ranging from 40%-60%, with the type of cladding used in the form of Zirlo. The calculation system uses the SRAC computer code with PIJ and CITATION modules for cell and core calculations, using JENDL-4.0 nuclide data. Parameters analyzed from the fuel cell calculation results are reactor criticality, excess reactivity, and power density profile. The analysis results show that the best fuel performance is found in fuel volume fraction of 60%, U-233 configuration on the fuel of 4-5-6%, and the addition of 2.5% Pa-231. This fuel configuration can achieve cycles of up to 19 years with excess reactivity at BOL of 2.57% dk/k and excess reactivity at EOL of 0.87% dk/k.
The Simulation of the Stratification Process of Some Liquid Salts by Using the Moving Particle Semi-Implicit Method
Authors: Yulianto Y , Mustari A P A , Baliana A 
Published: June 2022

Abstract
The use of liquid fuel is one of the developments in nuclear technology. Molten Salt Reactor leads the new technology in nuclear engineering in using liquid fuel. One of the interesting phenomena about using liquid fuel is how the inter-liquid fuel interacts, especially its stratification behavior. In this study, some components of the liquid salts, i.e. LiF-BeF2 (flibe), LiF-NaF-KF (flinak), and NaF-ZrF4 (nafzirf), paired with the Al liquid, were investigated to understand the stratification behavior of these liquids by simulation in the framework of the Moving Particle Semi-Implicit (MPS). The obtained results show the typical results of stratification with different physical properties. On the other hand, these results are good enough in explaining the interaction inter-liquid. In this study, it is obtained that the difference in density of the colliding liquid has a significant effect on the stratification process. The different result was obtained when explaining the temperature. The temperature of the colliding liquids does not have a significant effect on both the stratification process and the velocity profiles. These results are very important to conduct the next study about liquid salts.
Filtration efficiency analysis of cotton cloth-based mask for reducing transmission rate of COVID-19 using PM2.5 detection methods
Authors: Permana Sidik , Trianti Nuri 
Published: June 2022

Abstract
The spreading or transmission rate of COVID-19 caused by SARS-Cov2 infection is extremely fast and now almost all countries around the world reported the case of the disease. As a new type of coronavirus, it was identified that the size of SARS-Cov2 is about 100 nm (nano-meter). The spreading droplet from coughs is between 1 meter to another person around him. Therefore, the important task is to make a physical distancing more than 1 meter from the infected person. The transmission model of COVID-19 is different from other virus disease transmission such as through airborne or direct touch. The common transmission of COVID-19 is from the spreading of the droplet through the air as well as the other media surface. The transmission of respiratory infection via droplet will have different dimensions or sizes. When the droplet size of particles in diameter is less than 5μm (<5μm), this size will be referred to as droplet nuclei and it can be the residue of dried respiratory aerosol that results from evaporation of droplet coughed or sneezed into the atmosphere or by aerosolization of infective material. Another droplet size is 5 to 10 μm or more, it can be referred as a respiratory droplet or respiratory aerosols. One of the causes of the very fast-spreading transmission rate of COVID-19 is coming from droplet transmission through the air which contain virus in small droplet size type. It is recommended that airborne precautions for any situation involving the care of COVID-19 patients and consider the use of medical masks as an acceptable option in case of shortages of respirators (N95, FFP2 or FFP3). The other medical mask for general purposes in hospitals or clinics is a surgical mask. A surgical mask, also known as a procedure mask, medical mask, or simply as a face mask. Because of very rare and limited production volume of masks for ordinary people as well as special mask for medical also becomes very limited. Some homemade small industry tries to develop their own mask type and design by their own self. The use of homemade cloth base masks is becoming a new industry or an alternative for society to protect their health and activity from COVID-19. PM2.5 refers to atmospheric particulate matter (PM) that have a diameter of less than 2.5 micrometers. In the present study, the filtration efficiency of cloth cotton mask type by using detector particle type of PM2.5 is evaluated for reducing transmission of COVID-19. N95 mask type was used to be compared as special medical mask application with the cotton type mask for general use of people when the mask was very limited in the market. The analysis focused on the filtration efficiency of the mask that can reduce the particles entering the detector especially for particle size 2.5 micrometers or less to be used for droplet size of COVID-19 with the size of around that number.
Charge and Discharge of Capasitors: Revisiting the Analogy with Water in Connected Containers
Authors: Hasanah A W , Sunarya A S , Viridi S 
Published: June 2022

Abstract
Analogy can be considered as an approach in teaching an abstract concept, where in electricity related to capacitor, water and containers are sometimes used. In this work we try to summerize available reports related to this. Usually, the water flow (WF) represents electric current, water height (WH) is an analogy to electric potential difference, container floor area (FA) can be viewed as capacitance, hose (HS) is as connecting wire, and water reservoir with large floor area (WR) behaves as a battery. The voltage saturation while charging the capacitor and voltage decaying while discharging capacitor can be obtained with the use of WH, FA, HS, and WR elements. Even it is not so ideal, but the observation tends to show qualitatively similar curves. We also present comparation table between electric circuit and water circuit. Unfortunately, not every aspect in electric side has the counter part in the water side. The difference between the two systems are clear and must be noticed to avoid misconception for the teaching target.
Incorporation of Perovskite Cs2SnI6 into Dye Sensitized Solar Cell Structure and Its Optimization
Authors: Dosi Amaldeus Tani , Rahayu Setiya , Wulandari Priastuti 
Published: June 2022

Abstract
Generation of Dye Sensitized Solar Cell (DSSC) has become one of considerable research in the solar cell technology in the last two decades due to the ease of fabrication process. Several studies have been conducted to improve DSSC performance, for example by modifying the structure of DSSC or by adding perovskite material and metal nanoparticles (Au or Ag). Because lead is toxic and has a negative impact to the environment, other perovskite type of materials that are more environmentally friendly are needed. Tin based perovskite (Cs2SnI6) is known more stable in air than Pb based perovskite and it can be synthesized in an air environment. In this study, we attempt to synthesis Cs2SnI6 perovskite and incorporate the material into N719 dye solution in order to enhance the performance of DSSC. Cs2SnI6 was synthesized by simple chemical mixing at room temperature from CsI and stannic iodide (SnI4). The absorbance spectra of Cs2SnI6 perovskite show two specific peaks at wavelength of 293 nm and 362 nm. The energy band gap obtained by the Tauc-Plot method is about 3.1 eV. The performance of our fabricated DSSC device was done by J-V measurement. In our experiment, the addition of Cs2SnI6 into N719 dye solution in DSSC structure reveals the highest PCE value of 3.97% in comparison to PCE value of reference that is about 1.56%. However, the PCE value was drastically reduced from 4.03% in the 1st week to 1.07% in the 9th week for the case of device with addition ethanol solvent in perovskite
Optimization of metal nanoparticles concentration in dye solution to enhance performance of dye sensitized solar cells
Authors: Rahayu S , Dosi A T , Wulandari P 
Published: June 2022

Abstract
In this study, we incorporate metal nanoparticles of AuNP and AgNP into dye N-719 solution in order to enhance the light absorption of dye-sensitized solar cells (DSSCs) device. AuNP or AgNP was mixed into N-719 dye solution by optimized the concentration of metal NPs. The optical property of the mixtures was investigated by use of UV-Vis spectroscopy while the morphology of the solutions was captured by TEM microscopy. The performance of DSSCs was done by J-V measurement equipped with solar simulator under light illumination of 100mW/cm2. Our fabricated DSSC devices show the enhancement of current density and power conversion efficiency (PCE) with the incorporation of metal NPs into dye layer. Addition of gold nanoparticle capped by dodecanethiols (AuDT) 5.66 wt.% reveals the enhancement of PCE devices from 1.58% without AuDT as reference to 2.77% with AuDT. Similar case for the addition of AgSC8 into dye of DSSC gives the same tendencies.
General Couplings Conditions of Four-Dimensional Maxwell-Klein-Gordon System
Authors: Mulyanto  , Akbar Fiki T , Gunara Bobby E 
Published: June 2022

Abstract
In this paper, we investigate the conditions for the Maxwell Klein Gordon system’s general gauge couplings in (3 + 1)-dimensional Minkowski spacetime. For the multi-interaction of photons and charged spin-0 particle, we begin with the Lagrangian with the general coupling turned on. The equation of motion is then derived in the form of a nonlinear wave equation. We obtained the general solution for the vector potential using the spherical means method. By considering the Coulomb gauge condition, we get the constraint for the couplings, which are critical in proving the global well-posedness of the solution.
The Semiclassical Methods for Hawking Radiations on the Kerr – Newman – Vaidya Black Holes
Authors: Salimi Ahmad H. , Triyanta  
Published: June 2022

Abstract
Hawking radiation can be described as particle tunnelling picture in semiclassical regime. In this research, we derived Hawking temperature and entropy of non-stationary black hole Kerr - Newman - Vaidya using two semiclassical methods, which are radial null geodesic and complex path analysis. These two calculations gave the same results. The Hawking temperature is, approximately, inversely proportional to the mass and non-stationary term. We also derived the entropy of the black hole that corresponds to the temperature formulations that were derived by semiclassical methods. The entropy formulations that were calculated obey generalized second law of black holes.
Composite of graphene and in-situ polymerized polyaniline on carbon cloth substrate for flexible supercapacitor
Authors: Sembiring Albert Willy Jonathan , Sumboja Afriyanti 
Published: June 2022

Abstract
Flexible and lightweight energy storage is required for powering wearable electronic devices. Among the developed energy storage devices, supercapacitors have gained much interest as energy storage for wearable applications through their long cycle life and high power density. This work presents a flexible supercapacitor based on carbon cloth coated with graphene/polyaniline nanocomposite. Graphene/polyaniline nanocomposite is adopted as active material due to its high stability and the synergistic feature of pseudocapacitive and electrical double layer capacitance. The nanocomposite is synthesized from aniline and graphene in the sulfuric acid solution containing carbon cloth by chemical oxidative method, allowing the aniline to polymerize directly on the carbon cloth and graphene. Flexible supercapacitor devices with PVA/H2SO4 gel electrolyte exhibit an areal capacitance of 194.90 mF/cm2 at a scan rate of 5 mV/s. The device retains 77.21% of its initial capacitance after 500 cycles of cyclic voltammetry tests and exhibits a good performance during bending at 90° and 180°. This work demonstrates the potentials of carbon cloth-based supercapacitors for high-performance wearable supercapacitors.
STEM Project Topics Relevant to the Physics Curriculum at High School Level
Authors: Pangesti Kurnia Ika , Triyanta  
Published: June 2022

Abstract
The scientific process is conducted through investigative activities ranging from simple investigations of the surrounding nature to more complicated investigations to predict natural phenomena and solve various problems. Science learning should be carried out with a scientific approach that emphasizes scientific processes in which interactions with technology, the environment, and other sciences fields could not be avoided. Science learning through a STEM (Science, Technology, Engineering, and Mathematics) education approach is among approaches that are world-widely suggested, including in Indonesia, as can be seen in the national curriculum focal points. Unfortunately, as far as our knowledge is concerned, there is no such guide for teachers in implementing STEM education, including suggestions on the real issues and topics of STEM projects related to those issues. In this paper, based on a study of the content of the physics curriculum at the high school level, we propose real problems related to physics contents and possible STEM project topics derived from these fundamental problems. We emphasize topics that are technologically simple and easy to implement nationally, including in remote areas, but pedagogically contain rich aspects of learning.
Entanglement dynamics of non-linearly coupled spin-boson model using hierarchical equation of motion approach
Authors: Wasesatama V A , Kosasih J S 
Published: June 2022

Abstract
One of the most intensively studied problems in the field of open quantum systems is the spin-boson model. In this paper, we consider an extension of the spin-boson model with non-linear coupling. We solve the entanglement dynamics of two independent spins quadratically coupled to a bath of harmonic oscillators, using numerically ”exact” approach of hierarchical equations of motion (HEOM). Without Markovian approximation, generalized influence functional formulation by Hu et.al is used to describe the environmental effect of noisy quadratic bath in high-temperature regime. Wotters concurrence is then applied to numerically solved reduced density matrix to visualize the entanglement dynamics. By adjusting the environmental parameters, we vary the degree of non-markovianity and found the elongated time of entanglement.
MFUC: Mitigating Transient Congestion for Multi-flow Updating in SDN
Authors: Xia Jiqiang , Zhang Surong , Lan Julong 
Published: June 2022

Abstract
Through the logically centralized control plane, software-defined network (SDN) provides giant convenience for the design of the network strategies, like load balancing, fault recovery, etc. However, when deploying those strategies on the data plane, transient link congestions may occur since the updating process among the distributed switches is asynchronous. To address this issue, we propose a congestion-aware mechanism for multi-flow updating in SDN. We first obtain the real-time traffic size of each flow to be updated through the link monitoring model. Then we use the congestion-aware algorithm to find the potential congested link and construct the dynamic dependency graph of the updating process, to generate the final updating sequence. Finally, the meter table is configured to limit the flow of crucial predecessor nodes that may have congestion deadlocks to mitigate the transient congestion.