bluuebunny/crossref_metadata_2025_split huggingface dataset:
Getting to Know the Last Five Years Trend on Microcontroller Research: A Bibliometric Analysis
Authors: Yantidewi M , Jatmiko B , Sucahyo I , Kholiq A , Lestari N A , Deta U A 
Published: November 2021

AbstractA microcontroller is a compressed microcomputer manufactured to control embedded systems in office machines, robots, home appliances, motor vehicles, and several other gadgets. This device has played significant and essential roles in daily human life. Unfortunately, an in-depth analysis related to microcontrollers has not been found. Hence, it is compulsory to conduct a comprehensive analysis to understand better the research themes and trends in a specific scientific scope. This study aims to determine the extent of the research development on microcontrollers carried out throughout 2017-2021 through bibliometric analysis. From the bibliometric analysis that has been performed, we can conclude that research on microcontrollers is dominated by sensors, algorithms, voltage, and power. On the other hand, research that shows the relationship between solar panels and microcontrollers is still lacking. With this finding, it is hoped that researchers will focus their research on potential topics that are rarely looked at.
Radiation Profile of 2.45 GHz Bi-Circular Loop Antenna using Parabolic Reflector Made of Frying Pan (Wajanbolic)
Authors: Annovasho J , Rahayu V , Ardimas A , Firdaus R A 
Published: November 2021

Abstract
This study aims to determine the dimensions of the antenna and reflector which can optimally work at a frequency of 2.45 GHz. A good antenna is an antenna that has high directive capability, high performance, and inexpensive. In this work, the proposed antenna model was a Bi-Circular Loop (BCL) with a reflector using a frying pan (Wajanbolic). The methods were used in this research for instance computational simulation, fabrication, and characterization. Simulations were carried out using the Finite Different Time Domain (FDTD) technique. The simulation results were compared with the measurement process. In the first simulation, four reflectors sizes could qualify as antennas, namely diameters of 309.00 mm, 335.00 mm, 364.00 mm, and 381.00 mm. The four reflectors sizes were optimized by changing the radius parameter of the BCL antenna. The best results were obtained on the reflector with a diameter of 364.00 mm and a BCL radius of 17.38 mm. The simulation results showed a radiation profile consisting of an RL value of -35.69 dB and a gain value of 16.40 dBi. Based on the fabrication and measurement of the antenna, the RL value was -54.75 dB and the directional antenna gain was 16.00 dBi. An antenna with such performance can be used as a point-to-point Wi-Fi transmitter.
Determination of Resonance Parameters of The PANI Thin Film Fabricated using Spin Coating Method
Authors: Putri N P , Al Azis F , Kamasi D D , Sakti S P 
Published: November 2021

Abstract
This study aims to determine the resonance parameters of polyaniline thin films to better understand the viscoelasticity properties of polyaniline films. The spin coating method was used with varying solvent concentrations and rotating speed of spin coater during the deposition Polyaniline (PANI) thin film on a quartz crystal microbalance (QCM). To determine the resonance parameters of the PANI thin film, the impedance and QCM frequency measurements were first carried out before and after coated with PANI. The modelling used is a modified BVD model, and the determined resonance parameters are C0, C1, L1, R1, L2 and R2. From the results of the analysis using the GRG Nonlinear solver program, it was found that solution concentration and rotational speed in the spin coating process has a significant effect on resonator parameters of PANI thin film. The best solution concentration from this study was 2% DMF with a rotational speed of 2,000 rpm. This is because in these conditions it provides a minimal damping effect on QCM.
XRD and EDX Analyses on the Formation of MgTiO3Phase in (Mg0.6Zn0.4)(Ti0.99Sn0.01)O3Powders Due to Calcination Temperature Variations
Authors: Ermawati F U 
Published: November 2021

AbstractMgTiO3-based dielectric ceramics have been recognized as functional materials in the microwave telecommunications industry. Research and development on MgTiO3dielectric ceramics has therefore developed rapidly. This paper reports x-ray diffraction (XRD) and energy dispersive x-ray (EDX) analyses on the formation of MgTiO3phase in (Mg0.6Zn0.4)(Ti0.99Sn0.01)O3powder due to variations in calcination temperature from 550 to 700°C for 2 h. The powder was synthesized via the dissolved metal mixing course using magnesium, zinc, titanium and tin metal powders (Merck) as starting materials. The Rietveld refinement on the XRD patterns of the samples revealed that increasing the calcination temperature reduces the molar% content of MgTiO3phase of from (97.91±1.51) at 550°C to (87.81±1.29) at 700 °C and causes a decrease in the diffraction peak intensity. The remaining % belongs to TiO2rutile. The calcination temperature also enlarged the size of MgTiO3unit cell volume. The EDX data on the atomic% ratio of the elements confirmed the presence of the phases. Discussion of these results is presented in detail in this paper.
Effect of Adding of Green Betel Leaf Extract and Honey on Mechanical Properties of Chitosan/PVA Hydrogel Wound Plaster
Authors: Chamidah N L F , Rahanti A B , Kadasih M D , Sharfina F D , Rohmawati L 
Published: November 2021

AbstractWound plasters on the market still have drawbacks, including lack of elasticity and stinging. Thus, there is a need for new materials from nature to be used as the base material for wound plasters, namely betel leaf extract and honey composited with PVA/chitosan. This study purpose to find out mechanical properties of wound plaster of chitosan/PVA with the composition of betel leaf extract and honey. The first stage is making hydrogel by mixing PVA and chitosan, and the second stage is extracting green betel leaves and honey by the maceration method. Then the two stages were mixed with a composition of 5wt%, 15wt%, and 25wt% green betel leaf extract. The results were tested for tensile strength to determine the elasticity properties of the wound plaster. In this study, the 25wt% betel leaf extract concentration had the best tensile strength value of 0.219 MPa, and the modulus of elasticity was 0.11 MPa.
The Performance of Turmeric Paper as an Indicator of The Borax Content in Crackers
Authors: Ermawati F U , Prahani B K , Dzulkiflih  , Yantidewi M , Zainuddin A 
Published: November 2021

Abstract
Borax is one of food additives that has been prohibited from being used by the Indonesian Government because it is dangerous to health. However, the fact is that borax has been widely added to several food products, such as skewered meatballs, school children’s snacks, bread, meatballs, tofu and crackers. Crackers containing borax is easily found in traditional markets. Short-term consumption of borax can cause various symptoms such as headache, fever, malaise, nausea or vomiting, pain in the upper abdomen and diarrhea. While long-term exposure to borax will have a more dangerous effect, which can cause stomach disorders, seizures to acute kidney failure which can lead to death. This paper reports a simple, easy and inexpensive test of borax content using a home-made turmeric paper on ten types of crackers purchased randomly in traditional market. The aim is that the borax content test can be carried out by anyone only by buying a few ingredients from the local market and pharmacy, and without the need to involve laboratory tests, but with accurate results when compared to laboratory tests. As a comparison, a flame test and a colour test on the borax content carried out in the laboratorium using the AOAC 18 ed. 2005 Official Method Boric Acid & Borates in Food 970.33 and the FI ed. V of 2014 General Identification Test <291> Borat method A on Page 1423 was also completed. Among the 10 crackers tested, six of them were detected to contain borax. These results are very consistent with the laboratory test results. The performance of the home made turmeric paper is therefore reliable.
Prezi Mind Mapping Media in Physics Learning: A Bibliometric Analysis
Authors: Zakhiyah I , Suprapto N , Setyarsih W 
Published: November 2021

AbstractThis study aims to determine the trend of the author’s topics and keywords that are widely used related to Media Prezi Mind Mapping, to determine the contribution of Indonesian researchers in related research topics at an international scope, and to find out future research opportunities with associated topics mainly in physics learning. This research method is library research with descriptive analysis method through the bibliometric approach. The article’s metadata was obtained from the search results of the Google Scholar database, which found 16.600 articles for 2016-2020 with the keyword ‘Mind Mapping in Learning’. Meanwhile, based on the Scopus database, 7 Scopus indexed articles were obtained for 2014-2020 with the keyword ‘Prezi Mind Mapping’. All metadata obtained is saved in.csv and .risformat for further visualization byVOS viewer. The results of data analysis show that trend fans and contributions Indonesian researchers still very little. It can pose a challenge for future research to prove how far the existence level of Prezi Mind Mapping is to continue to be developed. In addition, there are recommendations for collaboration on mind mapping research topics in learning with one of the related keywords, namely STAD (Student Team Achievement Division), hoping to produce a more efficient learning model, especially in physics, to be applied in future research.
Critical Thinking Skills on Physics Learning during COVID-19 Pandemic: A Bibliometric Analysis using VOSViewer
Authors: Jatmiko B , Sunarti T , Prahani B K , Hariyono E , Dwikoranto  , Wibowo F C , Mahtari S , Misbah  , Asy’ari M 
Published: November 2021

Abstract
Critical thinking skills (CTS) are still one of the research trends in this decade, including during the COVID-19 pandemic. Research will focus on generating a profile of CTS on physics learning during COVID-19 pandemic based on bibliometric analysis using VOSViewer. The findings indicated there were some parameters or interrelationships among variables to capture current and future trend of CTS on physics learning, such as analysis, implementation, effectiveness, effect, development, and technology. The research implications are supported by recent research: (1) These findings will provide an empirical basis for the development of physics education research, especially online physics learning during the COVID-19 pandemic to practice CTS; (2) CTS can still be a research trend in the latest research; (3) Digitization of physics learning is becoming a trend to be carried out gradually and continuously.
The Effect of PjBLL Online Platform on Student Collaboration Skills and Basic Science Process Skills During the Covid-19 Pandemic
Authors: Dwikoranto  , Setiani R , Widiasih  
Published: November 2021

Abstract
The purpose of this research to describe the effect of Project Based Laboratory Learning (PjBLL) on collaboration skills and basic science process skills of students. This type of research is quasi-experimental with one group pretest-posttest design. The subjects of this study were 60 first year students from two different classes who were enrolled in the Basic Physics course at the Department of Chemistry, Universitas Negeri Surabaya Indonesia. The collaboration ability test on kinematics and particle dynamics was used to measure students’ collaboration skills, the basic science process skills test was used to measure students’ science process skills as a pre-test and post-test. The analysis of the results showed that students’ collaboration skills were complete on all indicators with gain scores in the high and sensitive categories, while basic science process skills were completed on all indicators with gain scores in the medium and high criteria. PjBLL Online platform can be used for lectures during the COVID-19 pandemic.
The Effect of ARICESA on Achievement Motivation and Understanding of Basic Science Concepts for Prospective Teacher Students
Authors: Putra D A , Setiani R , Dwikoranto  , Widiasih  
Published: November 2021

Abstract
The aim of this research to determine effect of the application ARICESA on student teacher achievement motivation and understanding of basic concepts. The subjects in this study were 34 students in the Department of Elementary School Teacher Education, Universitas Bhinneka PGRI Indonesia. One group pretest-posttest design was used in this study. The achievement motivation of prospective teachers is measured by a motivational questionnaire and understanding of basic concepts is measured by a conceptual test of concept understanding as a pre-test and post-test. Data analysis with t-test and prerequisite test and N-gains core. The results showed a significant increase in motivation effect for 5 indicators of achievement motivation with moderate criteria with an N-gain value range of 0.62 to 0.66 and the normalized mean N-gain is 0.65 in the medium criteria. There is a significant effect of increasing understanding of basic science concepts with a range of N-gain coefficients from 0.72 to 0.77 and a normalized average N-gain of 0.75 with high criteria.
A Profile of Scientific Literacy of Senior High School Students on Physics Learning
Authors: Azura F , Jatmiko B , Ibrahim M , Hariyono E , Prahani B K 
Published: November 2021

Abstract
In physics learning, students need to know the extent to which scientific concepts have been studied. Scientific literacy is the ability to make decisions based on scientific considerations, solve problems and apply the knowledge gained in everyday life. This study aims to scientifically analyse the scientific literacy ability of senior high school students on the kinetic theory of gases. The sample of this research is 90 high school students. Data analysis used descriptive qualitative. The results study show that high school students’ ability was very low, many students did not have scientific literacy ability on physics learning. The implications of this study can be used as empirical evidence that the scientific literacy of senior high school students on physics learning still needs to be improved.
Electromagnetic Wave Equation Approximation using FDTD method on Conductivity Material
Authors: Firdaus R A , Khoiro M , Asnawi A , Bustomi M A , Annovasho J 
Published: November 2021

Abstract
FDTD is a method that is applied in the simulation of electromagnetic waves. This study aims to simulate the propagation of electromagnetic waves on a material with conductivity and permittivity on the plate. The approximate form of Maxwell’s equations can be used to describe discrete electromagnetic waves. Signal analysis in the form of electromagnetic waves using position domains for magnetic field H and electric field E. By taking into consideration boundary conditions, stability, and boundary conditions, the proposed research employs the basic concept of differential equation method. The simulation results show that materials with high conductivity will cause the waves to decay. Under certain conditions, the relationship between the shape of the field to changes in conductivity and permittivity of the material is needed in the analysis process.
The potential influence of falling ice radiative effects on Central-Pacific El Niño variability under progressive global warming
Authors: Wang Li-Chiao , Li Jui-Lin Frank , Xu Kuan-Man , Dao Lan Thi , Lee Wei-Liang , Jiang Jonathan H , Fetzer Eric , Wang Yi-Hui , Yu Jia-Yuh , Chen Chao-An 
Published: November 2021

Abstract
The impacts of falling ice (snow) radiative effects (FIREs) on simulated surface wind stress and sea surface temperature (SST) in Central Pacific El Niño (CP-El Niño) under a progressive warming climate are examined. Using controlled simulations with the CESM1 model, it is shown that the exclusion of FIREs (no snow: NOS) generates persistent westerly anomalies in surface wind stress relative to that with FIREs (snow on: SON). These anomalies subsequently lead to a weakening of the easterly trade winds associated with warmer SST anomalies in modeled life cycle. Results over three separated 40 year intervals (P1: 21–60 years; P2: 61–100 years; P3: 101–140 years) are compared with Coupled Model Intercomparison Project phase 5 (CMIP5) models without FIREs. Both NOS configuration and CMIP5 models simulate longer life cycles of CP-El Niño events with weakening easterlies and warmer SST anomalies on the equator, persistently propagating eastward from the mature to dissipating phases. Compared to NOS, SON, on the other hand, produces a shorter CP-El Niño life cycle together with stronger easterlies and colder SSTs over the eastern to central equatorial Pacific. The magnitudes of the simulated westerlies and warm SST anomalies tend to diminish without eastward shifting following the peak of the CP-El Niño activity. There are substantial differences in CP-El Niño characteristics from P1 to P3 between NOS and SON. During P1, both SON and NOS show patterns which are consistent with their present-day counterparts. In P2 and P3, SON exhibits a prolonged CP-El Niño life cycle, while NOS develops a double-peak El Niño evolution at the mature and decaying phases. Regarding El Niño diversity and the projections, the CMIP5 models have not reached a consensus. The inclusion of the FIREs would increase the confidence in simulating El Niño future behavior.
Divergent trajectories of ocean warming and acidification
Authors: Mortenson Eric , Lenton Andrew , Shadwick Elizabeth H , Trull Thomas W , Chamberlain Matthew A , Zhang Xuebin 
Published: November 2021

Abstract
The ocean provides a major sink for anthropogenic heat and carbon. This sink results in ocean changes through the dual stressors of warming and acidification which can negatively impact the health of the marine ecosystem. Projecting the ocean’s future uptake is essential to understand and adapt to further climate change and its impact on the ocean. Historical ocean uptake of heat and CO2 are tightly correlated, but here we show the trajectories diverge over the 21st century. This divergence occurs regionally, increasing over time, resulting from the unique combination of physical and chemical drivers. We explored this relationship using a high-resolution ocean model and a ‘business as usual’ CO2 emission pathway, and demonstrate that the regional variability in the carbon-to-heat uptake ratios is more pronounced than for the subsequent carbon-to-heat storage (change in inventory) ratios, with a range of a factor of 30 (6) in heat-to-carbon uptake (storage) ratios among the defined regions. The regional differences in heat and carbon trajectories result in coherent regional patterns for sea surface warming and acidification by the end of this century. Relative to the mean global change (MGC) at the sea surface of 2.55 °C warming and a decrease of 0.32 in pH, the North Pacific will exceed the MGC for both warming and acidification, the Southern Ocean for acidification only, and the tropics and midlatitude northern hemisphere will exceed MGC only for warming. Regionally, mapping the ocean warming and acidification informs where the marine environment will experience larger changes in one or both. Globally, the projected ocean uptake of anthropogenic heat and carbon informs the degree to which the ocean can continue to serve as a sink for both into the future.
PHEV! The PHysically-based Extreme Value distribution of river flows
Authors: Basso S , Botter G , Merz R , Miniussi A 
Published: November 2021

Abstract
Magnitude and frequency are prominent features of river floods informing design of engineering structures, insurance premiums and adaptation strategies. Recent advances yielding a formal characterization of these variables from a joint description of soil moisture and daily runoff dynamics in river basins are here systematized to highlight their chief outcome: the PHysically-based Extreme Value (PHEV) distribution of river flows. This is a physically-based alternative to empirical estimates and purely statistical methods hitherto used to characterize extremes of hydro-meteorological variables. Capabilities of PHEV for predicting flood magnitude and frequency are benchmarked against a standard distribution and the latest statistical approach for extreme estimation, by using both an extensive observational dataset and long synthetic series of streamflow generated for river basins from contrasting hydro-climatic regions. The analyses outline the domain of applicability of PHEV and reveal its fairly unbiased capabilities to estimate flood magnitudes with return periods much longer than the sample size used for calibration in a wide range of case studies. The results also emphasize reduced prediction uncertainty of PHEV for rare floods, notably if the flood magnitude-frequency curve displays an inflection point. These features, arising from the mechanistic understanding embedded in the novel distribution of the largest river flows, are key for a reliable assessment of the actual flooding hazard associated to poorly sampled rare events, especially when lacking long observational records.
Compound hot temperature and high chlorophyll extreme events in global lakes
Authors: Woolway R Iestyn , Kraemer Benjamin M , Zscheischler Jakob , Albergel Clément 
Published: November 2021

Abstract
An emerging concern for lake ecosystems is the occurrence of compound extreme events i.e. situations where multiple within-lake extremes occur simultaneously. Of particular concern are the co-occurrence of lake heatwaves (anomalously warm temperatures) and high chlorophyll-a extremes, two important variables that influence the functioning of aquatic ecosystems. Here, using satellite observations, we provide the first assessment of univariate and compound extreme events in lakes worldwide. Our analysis suggests that the intensity of lake heatwaves and high chlorophyll-a extremes differ across lakes and are influenced primarily by the annual range in surface water temperature and chlorophyll-a concentrations. The intensity of lake heatwaves is even greater in smaller lakes and in those that are shallow and experience cooler average temperatures. Our analysis also suggests that, in most of the studied lakes, compound extremes occur more often than would be assumed from the product of their independent probabilities. We anticipate compound extreme events to have more severe impacts on lake ecosystems than those previously reported due to the occurrence of univariate extremes.
Quantum generalized hydrodynamics of the Tonks–Girardeau gas: density fluctuations and entanglement entropy
Authors: Ruggiero Paola , Calabrese Pasquale , Doyon Benjamin , Dubail Jérôme 
Published: November 2021

Abstract
We apply the theory of quantum generalized hydrodynamics (QGHD) introduced in (2020 Phys. Rev. Lett.
124 140603) to derive asymptotically exact results for the density fluctuations and the entanglement entropy of a one-dimensional trapped Bose gas in the Tonks–Girardeau (TG) or hard-core limit, after a trap quench from a double well to a single well. On the analytical side, the quadratic nature of the theory of QGHD is complemented with the emerging conformal invariance at the TG point to fix the universal part of those quantities. Moreover, the well-known mapping of hard-core bosons to free fermions, allows to use a generalized form of the Fisher–Hartwig conjecture to fix the non-trivial spacetime dependence of the ultraviolet cutoff in the entanglement entropy. The free nature of the TG gas also allows for more accurate results on the numerical side, where a higher number of particles as compared to the interacting case can be simulated. The agreement between analytical and numerical predictions is extremely good. For the density fluctuations, however, one has to average out large Friedel oscillations present in the numerics to recover such agreement.