bluuebunny/crossref_metadata_2025_split huggingface dataset:
Heavy Metal Ions Removal from Aqueous Solution using NiZnFe2O4/TiO2 Nanocomposites Adsorbent
Authors: Budianti Siska Irma , Istiqomah Nurul Imani , Sari Emi Kurnia , Suharyadi Edi 
Published: April 2024

Abstract
This research explores the adsorption effectiveness of NiZnFe2O4/TiO2 nanocomposites regarding Cr(VI). The nanocomposites were effectively synthesized utilizing coprecipitation and Stöber methods, incorporating diverse molar ratios of TiO2. The samples were subjected to characterization using methods such as X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy-energy dispersive X-ray (SEM-EDX), Fourier-transform infrared (FTIR), vibrating sample magnetometer (VSM), and ultraviolet-visible spectroscopy (UV-Vis). These analyses were conducted to evaluate the crystal structure, morphology, chemical bond formation, optical properties, magnetic properties, and removal efficiency of the specimens. XRD results showed that NiZnFe2O4 and TiO2 have a cubic and tetragonal structure. The crystallite size decreased as the TiO2 concentration increased. TEM image of NiZnFe2O4 reveals the formation of clusters, indicating uneven dispersion under agglomerated conditions. The average particle size is measured at (10.6 ± 0.8) nm. The Fourier-transform infrared (FTIR) analysis demonstrated the presence of functional groups O-H, C-H, and H-O-H, indicating the successful synthesis of the material. Moreover, the identification of MO-octahedral, MO-tetrahedral, and Ti-O functional groups suggested the formation of NiZnFe2O4/TiO2 nanocomposites. The incorporation of TiO2 had an impact on both the saturation magnetization and coercivity values, which fell within the ranges of 12.4 to 22.9 emu/g and 47 to 55 Oe, respectively. This finding indicates the presence of advantageous magnetic properties. The absorbance spectrum of these nanocomposites displayed a shift to the right (redshift), allowing them to absorb ultraviolet rays. The band gap of these nanocomposites ranges from (2.85 ± 0.02) to (3.29 ± 0.02) eV. Notably, NiZnFe2O4/TiO2 nanocomposites with a concentration ratio of 1:5 exhibit effective Cr(VI) removal efficiency, achieving a degradation value of 65.6%. The pseudo-kinetic model was first investigated to describe kinetic data and Cr(VI) removal determination. The SEM-EDX adsorbent results after adsorption showed the presence of Cr(VI) in the nanocomposites. Therefore, these results can promote NiZnFe2O4/TiO2 nanocomposites as a promising candidate in the removal of heavy metal waste.
Study of CO2 Injection into Sumatran Shale Layers to increase Hydrocarbon Gas Productivity of The Shale Gas Reservoir
Authors: Nurhandoko Bagus Endar B. , Septama Erlangga , Usman Totong Kusnadi , Wardaya Pongga Dikdya , Supriyanto Eko Bambang , Triyoso Kaswandhi , Susilowati  , Pratiwi Ratih , Cindrawati Maria , Rossa Vida Irine , Pratama Richie Rahmat 
Published: April 2024

Abstract
Injecting CO2 into a reservoir has some important reasons. CO2 injection can enhance oil and gas recovery by reducing the capillary pressure, increasing the pressure gradient, and changing the phase behavior of the fluids. It can reduce greenhouse gas emissions by capturing and storing CO2 underground. It can also create economic benefits by utilizing CO2 as a valuable resource and generating revenue from carbon credits. Therefore, injecting CO2 into a reservoir benefits the environment and the industry. We can inject CO2 in shale gas reservoirs to increase productivity because CO2 has a stronger adsorption capacity on shale surfaces than hydrocarbon gas. When CO2 is injected into shale reservoirs, it can displace the adsorbed CH4 flow out of the micropores and free up more space for gas flow. Injecting CO2 can also reduce the viscosity and density of shale gas, improving its mobility and transport. Moreover, injecting CO2 can provide environmental benefits by reducing carbon emissions and storing CO2 underground. Therefore, CO2 injection is a promising technique for enhancing shale gas recovery and mitigating climate change. We characterized several types of shale from Sumatra using XRD to determine the mineral content. We injected the shale sample with the inert gas and CO2 gas. The characteristics of pressure build up after CO2 injection seem lower than one after inert gas injection. The volumetric of released gas after injection shows the same phenomena as pressure build up’s phenomena which shows clearly that shale rock released less of CO2 gas than the one of inert gas (CH4). These phenomena show that the CH4 can be released easier than the CO2 in the shale rock. Therefore, CO2 can be utilized as material for enhancing the gas recovery in shale reservoir.
Initial Design of IoT-Based Earthquake Intensitymeter Using MMI Scale with Smartphone Display
Authors: Yulkifli  , Nofriandi Alwi , Triyono Rahmat , Audia Washilla , Sati’at Nur Anisa 
Published: April 2024

Abstract
This paper discusses the initial design of an earthquake intensitymeter measuring instrument using the IoT-based MMI scale. This research is motivated by the lack of instrumentation technology applied to the community for earthquake mitigation, which is related to the geographical location of Indonesia in earthquake-prone areas. The existing earthquake intensitymeter instrument still has shortcomings in terms of hardware and data acquisition. So this paper tries to provide a solution to the problem by using an MPU6050 accelerometer sensor that can measure PGA values simultaneously on three axes. This system is also equipped with an IoT-based intensitymeter for data acquisition that can be accessed via smartphone. In this system, the MPU6050 sensor is tested for characteristics first using the UC Berkeley Seismological Myshake application, and the average linearity test data obtained is 0.994. The data acquisition system is webserver-based so that every bit of data read every second will be sent to the webserver. The webserver is also equipped with a real-time measurement graph, and every smartphone device can access the data using the IP address of the webserver.
Design of Immersive Information Simulation of Negative Pressure Isolation Room for Covid-19 Infection Patients Using Virtual Reality
Authors: Suhendi  , Maulana R 
Published: April 2024

Abstract
This research aims to provide knowledge about how to create and the need for air circulation in negative pressure isolation rooms. If practiced directly, it will require large costs because it requires costs for procuring space and equipment. By using virtual reality (VR) technology, this problem can be solved because VR can provide an immersive environment like being in the real world. VR users will be able to experience how the requirements and how to create a negative pressure isolation room are like how it feels in the real world. So this can provide information and training on how to make a negative pressure isolation room before making an actual isolation room. Activities using VR will reduce the risk of errors and training costs on how to make an isolation room even without the cost of equipment. The purpose of this research is to provide convenience for health educators and the government on how to make negative pressure isolation rooms and the need for air circulation. So, it is enough to use VR technology, so the information on how to use VR is enough to make the isolation room and its needs work without having to use the right tools. This research method is descriptive and quantitative which begins with a literature review followed by an analysis of the need for isolation rooms and VR immersive environments. The implementation and testing process results in VR technology being able to help understand negative pressure isolation rooms for health workers.
Fidelity Comparation of Two-Qubit Quantum Teleportation with Bit-Flip and Phase-Flip Channel
Authors: Prabowo Ananto Ari , Taufiqi Muhammad , Hatmoko Bayu Dwi 
Published: April 2024

Abstract
This study investigates the effect of noise on two-qubit quantum teleportation through a four-qubit entangled channel theoretically. Therefore, in this study a comparison of two states of teleportation through ideal and noisy channel was carried out. The noisy channel can have the effect of bit-flip channel and phase-flip channel. From these two effects, it is found that the channel transforms in-to a mixed state. If the noise is neglected, the channel is pure state. Then, this channel is measured and fidelity is calculated. The fidelity of an ideal environment is 1. This indicates that the teleportation was successfully sent and at the same time confirms the teleportation behavior under ideal conditions. In noisy environments, fidelity can be less than 1. Two factors in noisy environment that affect fidelity are noise factor (p) and the orginal parameter states (transmission coefficients). In this calculation, for the bit flip noise, we observed that as the values of the coefficient values of transmitted state increase, the fidelity value increases. Meanwhile, for the phase flip noise, we observed that as the values of the coefficient values of transmitted state increase, the fidelity value decreases.
Light Management Investigation of Transparent DSSC based on Ln3+ ion doped BaO-ZnF2-B2O3-TeO2 Glass (Ln3+ = Dy3+/Sm37Eu3+) as UV Down-conversion Material
Authors: Yuliantini L , Nursam N M , Paramudita I , Pranoto L M , Shobih  , Hidayat J , Kaewkhao J , Djamal M 
Published: April 2024

Abstract
Solar irradiance to electrical energy conversion could be achieved via photoelectric effect using solar cells device. However, not all solar wavelengths could be captured and converted by the active layer of solar cell. The absorption limitation associated with the bandgap energy of solar cell active layer in the ultraviolet region (high photon energy) and infrared region (low photon energy) leads to 70% energy loss. Introducing a material that can convert higher photon energy to lower photon energy that is suitable with the bandgap energy of the solar cell provides a solution to this problem. In the present work, glass materials based on BaO, ZnF2, B2O3, TeO2, and Ln2O3 (Ln2O3 = Dy2O3, Sm2O3, and Eu2O3) were developed using conventional melt and quenching technique and applied as down-conversion (DC) element in dye-sensitized solar cell (DSSC). The absorption spectra of Z907 as dye photosensitizer was measured as well as the absorption spectra of DC glass. The DC glass emission spectra were also investigated to know the compatibility between the absorption of solar cell and the emission band of the DC glass. The current-voltage of the DSSC was measured while placing the DC glass on top of the solar cell device. The electrical parameters, such as power conversion efficiency, fill factor, short-circuit current, and open-circuit voltage, were then determined to analyze the effect of DC glass application on the performance of DSSC. DC glass with 1.5Eu produced an efficiency of 2.03%, showing the best result among other lanthanide ions.
Physical and Chemical Characterization of Commercial Kappa-Carrageenan with Ammonium Chloride as Electrolyte in Organic Battery Application
Authors: Anisah  , Sari V K , Turnip M A F , Wulandari P , Rudati P S 
Published: April 2024

Abstract
In this research, we attempt to investigate the difference in physical and chemical characteristics of commercial kappa-carrageenan and purified kappa-carrageenan as electrolytes in organic battery applications. Kappa-carrageenan was used as a host polymer to prepare biopolymer electrolyte films and ammonium chloride was used to enhance the charge transport process in the electrolyte layer of the organic battery. We characterized the physical and chemical properties of commercial kappa-carrageenan and purified kappa-carrageenan by use of UV-Vis spectroscopy, tensile-test measurement, Fourier Transform infrared spectroscopy and Raman spectroscopy in the form of solution and thin film samples. The results show that commercial kappa-carrageenan shows the absorbance area in Ultraviolet range with a maximum peak at 286 nm, while the maximum absorbance peak of purified kappa-carrageenan is slightly shifted at 288 nm. The chemical characterization of both kappa-carrageenan based on FTIR and Raman spectra show no significant structural change between kappa-carrageenan with or without the addition of ammonium chloride. XRD diffraction confirms that commercial kappa-carrageenan is amorphous and kappa-carrageenan with ammonium chloride has high intensity with sharp peaks around 2θ = 32º. The morphology of the thin film of purified kappa-carrageenan seem has a rougher surface in comparison to the commercial kappa-carrageenan. We found commercial kappa-carrageenan with ammonium chloride has high conducting about 1.55 x 10-5 Scm-1. Tensile test measurements indicate that commercial kappa-carrageenan is more flexible for use as an organic battery than the purified kappa-carrageenan.
Facile Synthesis of Nanocomposite ZnO and Red Betel (Piper crocatum Ruiz & Pav)
Authors: Muflihah S A , Sustini E , Aimon A H , Permatasari F A , Abdullah M 
Published: April 2024

Abstract
Green synthesis of zinc oxide nanoparticles is one of the most widely conducted research nowadays. The need for a facile and environmental synthesis method for nanomaterial is something interesting to develop. Red betel, which is a typical Indonesian herbal plant and abundant to find, has a phytochemicals property that potential application for bioreductors and capping agents. In this study, experiments were carried out with the aim of green synthesize nanocomposite ZnO-red betel leaves and studying their properties. The obtained powder was characterized with Fourier-Transform Infrared Spectroscopy, Scanning Electron Microscope, and Energy Dispersive X-ray Spectroscopy. The results showed that the obtained sample is ZnO nanoparticles with uneven surfaces with diameter < 100 nm.
Clustering Of Regions With Potential For A Tsunami In Indonesia Using The DBSCAN Method (Data Study for 1822 – 2022)
Authors: Avisena  , Febrina Melany 
Published: April 2024

Abstract
Indonesia is a country comprising many islands and having an extensive coastline where coastal communities frequently engage in various activities. Tsunamis are a natural disaster risk in these coastal regions. This study aims to identify areas prone to tsunamis and analyze their characteristics using variables such as longitude, latitude, focal depth, and earthquake magnitude. The Density-Based Spatial Clustering of Application with Noise (DBSCAN) and OPTICS algorithms were used to group the tsunami datasets.
Validation of OpenMC Code Criticality Value Calculation for GFR Reactor with UN-PuN Fuel
Authors: Prasetya Fajri , Mabruri Ahmad Muzaki , Karomah Iklimatul , Syarifah Ratna Dewi , Aji Indarta Kuncoro , Trianti Nuri 
Published: April 2024

Abstract
The use of OpenMC code needs to be validated with other code, so that an accurate and valid criticality value is generated. The validation value is affected by the minimum number of particles used. Determination of the minimum number of particles is carried out by varying the number of particles so that they have a convergent value, which is in the range of 100-50000 particles. The results of determining the minimum number of particles are then used to find the minimum number of cycles consisting of active and inactive batches. This study uses the criticality value parameter in the form of an effective multiplication factor (k-eff) as a benchmark for code accuracy. The k-eff values generated by OpenMC and SRAC are then compared and the validation error value is searched. The error value is found by calculating the k-eff (Δk-eff) difference between the two codes. OpenMC code can be said to be validated if it has an error value of less than 1% against the calculation results of the SRAC code. The calculation results of determining the minimum number of particles show k-eff values in the range of 35000 - 50000 minimal changes significantly or not fluctuating. The calculation of k-eff and entropy in cycle 500 shows a convergent value at the active batch value of >30. Based on the data cycle, researchers used 100 active batches and 30 inactive batches to perform validation calculations. The results of the validation calculation using UN-PuN fuel with a plutonium material composition of 10% showed a maximum k-eff error value of 0.819%. The Δk-eff obtained is 0.008.
Explaining the muon g – 2 discrepancy by the two-Higgs-doublet model
Authors: Farhan M , Julio J , Kosasih J S 
Published: April 2024

Abstract
The anomalous magnetic dipole moment of muon (from now on called muon g – 2) is one of the precision measurements sensitive to new physics. Recent measurement, performed by the Muon g – 2 Collaboration of Fermilab, differs from the Standard Model (SM) value calculated by the Muon g – 2 Theory Initiative Group at the combined statistical significance of 5.1σ. Taking at face value, such discrepancy is caused by new physics. In this paper, we explain the discrepancy in the context of the two-Higgs-doublet model. We shall systematically classify every scenario that may induce muon g – 2. Their compatibility with relevant constraints, e.g. the oblique parameters and/or lepton-favor universality will also be discussed. We shall also show that the two-Higgs-doublet model can be extended to the Zee model, giving rise to radiative neutrino masses.
Degrade Methyl Orange by Combining Cu2O/Al2O3 and H2O2 as Catalyst
Authors: Song Zhen , Xing Yasheng , Song Wei 
Published: April 2024

Abstract
To efficiently degrade printing and dyeing wastewater at low costs, Cu2O/Al2O3 catalyst was prepared by electrochemical method. Under its combined action with H2O2, photocatalytic degradation of methyl orange solution, as simulated wastewater, was carried out. With the aid of X-ray diffractometer, X-ray microanalysis system and scanning electron microscope, the structure and composition of catalyst film were designed by adjusting the electrochemical parameters, and the performance of photocatalyst was evaluated by the degradation rate of methyl orange. It was found that after anodizing aluminum alloy for 2 h in a 2 mol/L H2SO4 solution under a voltage of 15 V, alumina film with reasonable pore size distribution could be prepared on the alloy surface. By electroplating the film in a 0.01 mol/L CuSO4 solution at 5°C, and then hydrothermally treating it at 200°C, the Cu2O/Al2O3 photocatalyst could be obtained. The prepared Cu2O/Al2O3 and 10% H2O2 were used jointly as photocatalyst to degrade 10 mg/L methyl orange solution for 480 min, which achieved a methyl orange degradation rate of up to 82.1%.
Improve the Insulation Performance of Anodic Coating by Plasma Discharge Treatment
Authors: Xing Yasheng , Song Zhen , Song Wei 
Published: April 2024

Abstract
Since the plasma discharge treatment has been applied for the insulation enhancement of anodic coatings, we explored how the current density impacted the coating insulation performance. SEM, XRD and electrochemical workstation were utilized for identifying the coating crystallinity, compactness and impedance. As demonstrated by results, the anodic coating is transformable into compact crystalline alumina at a 30-mA/cm2 current density, whose impedance is twice that of original anodic coating.
Study on the Stability of Hydrogen-Bonded Energetic Material 3-Nitropyrazole under High Pressure
Authors: Yu Zhiqing , Xu Yifei , Yan Tingting , Xi Dongyang , Jiang Ran , Zhang Dandan 
Published: April 2024

Abstract
The stability of hydrogen-bonded energetic material 3-nitropyrazole (3-NP, C3H3N3O2) under high pressure was studied using a diamond anvil cell, Raman spectrometer, and simulation calculation. Under the hydrostatic experimental pressure and simulated pressure of 10 GPa, the optical Raman spectra, the change of cell parameters, and the Hirshfeld surface energy of 3-NP were obtained respectively. The analysis of the measured Raman spectra shows that the structure is still in original phase at 10 GPa pressure. The effects of pressure on cell parameters, molecular arrangement, and hydrogen bonding were observed by simulation calculation. Systematic analysis of the subtle structural changes, anisotropic characteristics, and various interactions of 3-NP shows that the stability of 3-NP is related to the special trimer structure.
Plasma-based etching approach for GEM detector microfabrication at FBK for X-ray polarimetry in space
Authors: Lega A. , Novel D. , Facchinelli T. , Sgrò C. , Baldini L. , Minuti M. , Boscardin M. , Pepponi G. , Iuppa R. , Hall-Wilton R. , Latronico L. 
Published: April 2024

Abstract
Gas Electron Multiplier (GEM) detectors are crucial for enabling high-resolution X-ray polarization of astrophysical sources when coupled to custom pixel readout ASIC in Gas Pixel Detectors (GPD), as in the Imaging X-ray Polarimetry Explorer (IXPE), the Polarlight cubesat pathfinder and the PFA telescope onboard the future large enhanced X-ray Timing and Polarimetry (eXTP) Chinese mission. The R&D efforts of the IXPE collaboration have resulted in mature GPD technology. However, limitations in the classical wet-etch or laser-drilled fabrication process of GEMs motivated our exploration of alternative methods. This work focuses on investigating a plasma-based etching approach for fabricating GEM patterns at Fondazione Bruno Kessler (FBK). The objective is to improve the aspect ratio of the GEM holes, to mitigate the charging of the GEM dielectric which generates rate-dependent gain changes. Unlike the traditional wet-etch process, Reactive Ion Etching (RIE) enables more vertical etching profiles and thus better aspect ratios. Moreover, the RIE process promises to overcome non-uniformities in the GEM hole patterns which are believed to cause systemic effects in the azimuthal response of GPDs equipped with either laser-drilled or wet-etch GEMs. We present a GEM geometry with 20 μm in diameter and 50 μm pitch, accompanied by extensive characterization (SEM and PFIB) of the structural features and aspect ratios. The collaboration with INFN Pisa and Turin enabled us to compare the electrical properties of these detectors and test their performance in their use as electron multipliers in GPDs. Although this R&D work is in its initial stages, it holds promise for enhancing the sensitivity of the IXPE mission in X-ray polarimetry measurements through GEM pattern with more vertical hole profiles. The outcomes of this study have the potential to advance the current technological platforms and improve the capabilities of future space-based X-ray polarimetry missions.
Design of the OBELIX monolithic CMOS pixel sensor for an upgrade of the Belle II vertex detector
Authors: Pham T.H. , Auguste D. , Babeluk M. , Barbero M. , Baudot J. , Bergauer T. , Bernlochner F. , Bertolone G. , Bettarini S. , Bosi F. , Bonis J. , Boudagga R. , Breugnon P. , Buch Y. , Buchsteiner F. , Calo M.S. , Casarosa G. , Dingfelder J. , Dorokhov A. , Federici L. , Fillinger T. , Finck C. , Forti F. , Fougeron D. , Frey A. , Gaioni L. , Giroletti S. , Himmi A. , Kou E. , Hu Guo C. , Irmler C. , Karagounis M. , Kishishita T. , Krüger H. , Kumar A. , Marinas C. , Massa M. , Massaccesi L. , Mazorra de Cos J. , Minuti M. , Mondal S. , Morel F. , Nakamura K. , Pangaud P. , Peinaud Y. , Ratti L. , Re V. , Riceputi E. , Ripp Baudot I. , Rizzo G. , Schall L. , Schwanda C. , Schwenker B. , Schwickardi M. , Stavroulakis P. , Wang S. , Wessel C. , Winter M. , Traversi G. , Valin I. , Xu D. ,   the Belle II VTX collaboration and Belle II VTX Upgrade Group
Published: April 2024

Abstract
The Belle II collaboration has initiated a program to upgrade its detector in order to address the challenges set by the increase of the SuperKEKB collider luminosity, targeting 6×1035 cm2 s-1. A monolithic CMOS pixel sensor named OBELIX (Optimized BELle II pIXel) is proposed to equip 5 detection layers upgrading the current vertex detector. Based on the existing TJ-Monopix2, OBELIX is currently designed in 180 nm CMOS process.