bluuebunny/crossref_metadata_2025_split huggingface dataset:
Compensation Gyrocompass Based on MEMS
Authors: Bogolyubov V , Bakhtieva L 
Published: November 2021

Abstract
The study of an astatic compensating gyrocompass, built on the basis of a modulation micromechanical gyroscope (MMG) of a hybrid type, has been carried out. A kinematic diagram is given and the principle of operation of the device has describing. The device uses the modulation principle based on obtaining information about the angular motion of the rotor and creating control torques in a rotating coordinate system, which makes it possible to exclude such a significant disadvantage of MMG as "zero offset". A feature of the gyrocompass under consideration is the use of two channels for controlling the rotor of the MMG, namely: a channel for the formation of a guiding moment, striving to combine its main axis with the direction of the true meridian and a channel for compensating this guiding moment. A linearized mathematical model has building, on the base of which an effective algorithm for the operation of a compensatory astatic gyrocompass is proposed. The device under consideration can be used to determine the true azimuth of the longitudinal axis of a mobile ground object, it has a higher measurement speed compared to devices built on three-degree "heavy" gyroscopes, and has good resistance to external influences (vibrations, shocks, etc.).
Stress Evaluation in the Blank Critical Region During Extrusion of the Pipe Blank into the Hole
Authors: Maryin S B , Andrianov I K , Chernomas V V 
Published: November 2021

Abstract
The study assessed the stress state of the pipe blank in the process of extrusion into the hole. A finite element formulation of the research problem with the setting of boundary conditions in displacements and surface loading conditions is presented. The calculation of the workpiece was carried out in an elastic formulation using the Nastran engineering analysis application. The assessment of the stress state in the critical region is presented in two approximations with a thickening of the grid in the stress focus area. Based on the results of the distribution of equivalent stresses, an assessment of the unevenness of the stressed state of the workpiece was carried out. The presented study is important because it allows us to predict the appearance of defects in the process of forming a pipe billet during extrusion into a hole, to evaluate the power loading mode.
Research of a Fractal Microstrip Antenna Based on the Modified Minkowski Curve of the Second Iteration
Authors: Smirnova M M , Statsenko L G , Mirgorodskaya Yu V , Klescheva N A , Bernavskaya M V 
Published: November 2021

Abstract
Evolving telecommunications systems require modern antennas with improved performance. The creation of miniature antennas with a high gain, multi-band properties and defined polarization is an urgent task. New challenges in the reception and emission of electromagnetic waves are being solved in different ways. The use of fractals in the construction of antennas is becoming widespread. This article presents the results of a study of fractal microstrip antenna of the second iteration based on the Minkowski geometry. The main parameters such as the reflection coefficient, directivity and efficiency are described. Resonance frequencies and directional patterns at these frequencies as well as bandwidths are shown. Conclusions concerning the possibility of using this type of antenna in various applications are drawn.
The signature of the quadratic generalized uncertainty principle on the newtonian gravity and galaxy mass profile
Authors: Apryandi F , Belfaqih I H , Sulaksono A 
Published: November 2021

Abstract
In this study, we discuss the corrections implies by the presence of the general uncertainty principle (GUP) on Newton’s law of gravity by virtue of Verlinde’s proposal. We argue here that GUP leads to twofold modification, namely on the equipartition theorem and the holographic relation (Bekenstein-Hawking formula). Hence, following Verlinde’s proposal, we obtain quantum corrections term to the Newtonian gravity. In addition, we also report the quantum corrected mass profile of the galaxy. We restricted our derivation to first order in the GUP’s free parameter and compared it analytically with the other relevant works.
Analysis of physics textbook reviewed from the aspects of scientific literacy in the Bandung city
Authors: Sahriani S , Samsudin A , Sinaga P 
Published: November 2021

Abstract
The skills that students must possess in 21st century learning are to prepare scientific literacy. This study aims to determine the ability of scientific literacy in the XI grade physics textbook used in Bandung senior high school. This research is a descriptive study that aims to obtain information about developing scientific literacy skills in the three textbooks used. The results showed that the three books did not fully contain the categories of scientific literacy with the average appearance of the categories for the three books of 44% for the knowledge of science, 31% for science as the investigative nature of science, 18% for science as a way of thinking, and 7% for the interaction between science, technology and society. It was concluded that the textbooks used were not optimal in facilitating all aspects of students’ scientific literacy in a balanced manner. Therefore, the results of this study can be used as a basis for designing and developing physics textbooks needed to improve students’ scientific literacy skills.
Development physics representational fluency instrument test of electrostatic concept
Authors: Handayani W , Masrifah M 
Published: November 2021

Abstract
Physics representational fluency instrument test of electrostatic concept have been developed. The instrument’s form of multiple-choice that consist of 20 item electrostatic in physics context to assess pre-service physics teachers’ representational fluency. The test includes four component of representational fluency: constructing single representation, constructing multiple representation, translating between representation and reviewing single representation. Representational fluency test is developed using Design and Development Research (DDR) method with four phases consists of analysis, design, development, and evaluation. Validation the structure of the test is consulted with a member of expert academic staff in the field of physics education. After design test and expert review, the test was implemented with 57 pre-service physics teacher. From 20 item of representational fluency test there was 15 item of the test is valid and reliable.
Enhancing conceptual understanding via Diffraction Grating Innovative Media (DIAGRAM)
Authors: Laurenty F , Sulsilah H , Amin A M , Samsudin A , Rusdiana D 
Published: November 2021

Abstract
Diffraction grating innovative media (DIAGRAM) is a physics experimental tool that can be implemented in the learning of diffraction grating material. This research endeavored to analyse students’ conceptual understanding on diffraction grating material after using the diffraction grating innovative media (DIAGRAM). Pre-experimental design was used as the method in this research with one-group pretest-posttest as the design and 10 female students and 1 male students from three schools in Indonesia which are in Banjaran, Pamarayan and Makassar participated. Starting from interpretation test using multiple choices test consisting of 8 questions and using google form, the stage then carried out learning activity utilizing the DIAGRAM and given a posttest in the end of the class. At the last data had been analysed by N-Gain. The come about of this consider were gotten by students’ increment in high category which is 0,73. To sum up, diffraction grating innovative media (DIAGRAM) can make enhancement of senior high school students’ conceptual understanding in diffraction grating material.
Enhancing scientific argumentation skill through partnership comprehensive literacy
Authors: Hadianto D , Damaianti V S , Mulyati Y , Sastromiharjo A 
Published: November 2021

Abstract
This study focuses on the use of Partnership Comprehensive Literacy (PCL) as a reading strategy to support reading in science and to explore the level of students’ Scientific argument. Partnership Comprehensive Literacy consist of 4 components that address the topic of the reading activity: the statements of the content, what I think, what the texts say, and evidence of the text. This study uses a mix method to identify and improve students’ scientific argumentation skills. The instrument used is a set of questions about electricity and magnetism. In addition, the argument level rubric instrument that contains argument components is used to analyse the level of students’ scientific arguments. The participants of this study were 40 college students consisting of 25 females and 15 males in the department of physics education taking a course in the fundamental of physics. The findings revealed that the students’ level argument was dominated by the use of Claim-Reasoning-Evidence (CRE). In addition, students evaluated that the use of PCL in reading activity as being challenging but an interesting process because they have to find the evidence in the texts to support their statements of what I think.
Implementation of higher order thinking laboratory (HOTLAB) on magnetic field with real blended virtual laboratory to improve students critical thinking skills
Authors: Setya W , Agustina R D , Putra R P , Prihatini S , Hidayatulloh R , Isnaeni P S , Malik A 
Published: November 2021

AbstractThe 21st century demands critical thinking skills, problem solving, and communication skills, so physics education students must be prepared to have these skills in the current industrial 4.0 era. These skills can be trained and developed through Higher Order Thinking Laboratory (HOT-LAB) activities. The purpose of this study was to analyze the effect of the HOT-LAB laboratory type on the improvement of critical thinking skills on the concept of magnetic fields. This research uses One Group Pretest-Posttest Design. The instrument uses questions of practical understanding and understanding of 10 questions. The results of data analysis showed that the average N-Gain score for the experimental class was 45.3 and the control class was 35.7. The use of HOTLAB in a real blended virtual laboratory has moderate effectiveness to improve Critical Thinking Skills on the subject of magnetic field.
The effect of the STEM approach with the formative assessment in PBL on students’ problem solving skills on fluid static topic
Authors: Parno  , Kusairi S , Wahyuni D R , Ali M 
Published: November 2021

Abstract
The use of problem-based learning with STEM and formative assessment (PBL-STEM-FA) to overcome the weakness in students’ problem solving skills (PSS) is still limited. This research investigates the effect of PBL-STEM-FA in students’ PSS in the topic of fluid static. This research uses the pretest-posttest non-equivalent group design, and involves the research subject of class XI high school students in Malang, Indonesia. Experiment class’ students make engineering products in the form of miniature boats. The PSS test instrument with 0.799 reliability were used in this study. The data were analyzed by independent t-test, Hake-gain, and Cohen-effect. The results showed that students of PBL-STEM-FA class had significantly higher PSS and N-gain than students of PBL class. The highest raise occurred in the Useful Description indicator and hydrostatic pressure subtopic for the Experiment class; and Useful Description indicator and surface tension subtopic for Comparison class. But, the two classes had the same lowest raise, namely in the Mathematical Procedures indicator and capillaries subtopic. The effect size at 0.651-medium category implies that the implementation of PBL-STEM-FA is recommended to be carried out in the field to increase students’ PSS. It is recommended that future studies add an “Art” aspect to the STEM approach.
The analysis of the 2019 annular solar eclipse with simple instruments for developing student worksheet
Authors: Asmoro C P , Achmad A R 
Published: November 2021

Abstract
The annular solar eclipse occurred when the Earth-Moon-Sun position aligned in the same line where the angular diameter of the moon is smaller than the angular diameter of the sun due to the moon is on the farthest distance with respect to the earth. The event was observed on 26 December 2019 at Siak Regency, Province of Riau, Indonesia. Based on that event observation, the sun is gradually covered by the moon until the peak event where the sun is completely covered and showing “ring of fire”. All stages of eclipse are captured as images from DSLR camera that been attached into telescope with specific filter as well as illumination determination from observation location using lux meter during the event. This study explained how to get the information from solar eclipse images available by using image-processing software namely ImageJ so it can be used as a student worksheet. The plotting of both pixel area-time graph and illumination-time graph of this study shows a similar trend. Therefore, the data acquired in this study is obtained well so it can be used as a student worksheet in the Astronomical Position lecture based on the actual phenomenon with a simple instrument for observation.
Development of questionnaire instrument to assess students’ transformative competencies in science learning
Authors: Rusyati L , Rustaman N Y , Widodo A , Ha M 
Published: November 2021

Abstract
According to the OECD Education 2030 project, students in every country need to be ready as agents of change in the future. Three transformative competencies (Creating New Value, Reconciling Tensions and Dilemmas, Taking Responsibility) which are expected to develop students’ awareness, responsibility and innovation are used as focus of this study. A descriptive research for developing a valid and reliable questionnaire to assess the transformative competencies was conducted to investigate these competencies of junior high school students in Indonesia. It consists of 39 statements with a 5 Likert scale representing each transformative competency. A total of 445 students from 10 schools representing five provinces participated which consisted of students from 7th grade (222), 8th grade (91), and 9th grade (132) with the proportion of male (174) and female (271) students. The questionnaire was distributed on-line in sequence. The analysis results in that the questionnaire has a high reliability index of 0.96 for Cronbach’s Alpha (IBM SPSS Statistics 25), 0.94 for Person Reliability and 0.97 for Item Reliability (Winsteps Rasch Model) and good validity index for all items in the questionnaire, because the calculated r value is greater than the r table value. Correlation is significant at the 0.01 level (2-tailed). In general, students’ responses are on a “fairly typical of me” scale, except for TC4 statement “I can offer new solutions when there are problems while studying science”, which is “not very typical of me”. These results provide opportunities for further study to increase student creativity in science learning.
Human development index modelling in South Kalimantan province using panel regression
Authors: Istiqhomah M , Salam N , Lestia A S 
Published: November 2021

Abstract
Human development is a paradigm and becomes the focus and target of all development activities. Development is a way to improve welfare and a better quality of life. The Human Development Index (HDI) is one indicator to measure the success of a development. The purpose of this research is to describe the factors that are thought to influence HDI in South Kalimantan Province, estimate the parameters of the HDI panel regression model, and determine the best model. The data of this research is sourced from the Central Statistics Agency (BPS) of South Kalimantan Province with a period from 2015-2018. Based on the results of data analysis it can be concluded that the Fixed Effect Model with the time effect is the best model of the HDI panel regression in South Kalimantan Province with an R-Squared value of 99,81.
A note on almost prime submodule of CSM module over principal ideal domain
Authors: Wardhana I G A W , Nghiem N D H , Switrayni N W , Aini Q 
Published: November 2021

Abstract
An almost prime submodule is a generalization of prime submodule introduced in 2011 by Khashan. This algebraic structure was brought from an algebraic structure in ring theory, prime ideal, and almost prime ideal. This paper aims to construct similar properties of prime ideal and almost prime ideal from ring theory to module theory. The problem that we want to eliminate is the multiplication operation, which is missing in module theory. We use the definition of module annihilator to bridge the gap. This article gives some properties of the prime submodule and almost prime submodule of CMS module over a principal ideal domain. A CSM module is a module that every cyclic submodule. One of the results is that the idempotent submodule is an almost prime submodule.
Balikpapan’s wind analysis to determine air quality monitoring point to support smart environment monitoring system
Authors: Faisal M , Endrawati B F , Rahendaputri C S 
Published: November 2021

Abstract
In this industrial era, air pollution become a concerning problem since it can cause some respiratory problems. One of the air pollutions was Sulphur dioxide which dilutes fast in atmospheric water vapor resulting in acid rain which can affect the organism. Thus, in this research, we study the probability of the receptor’s location according to wind direction, as the preliminary information on deciding monitoring point. The meteorological data were obtained from Balikpapan’s Agency for Meteorological, Climatological, and Geophysics. The wind data was then plotted using a wind rose plot program called WRPLOT. Afterward, the dominant wind speed and direction will then be analyzed using google earth to know which point will be affected by the pollution dispersion from the chimney in Balikpapan. The results show that wind in Balikpapan throughout 2020 mostly blew from Southwest to Northeast Direction. Thus, the most probable receptor locations were open green spaces with no settlement around. This will have less impact on human health. Nevertheless, further research can be conducted to know better the on-air dispersion model around the power plant, how the green plant will be suffered from this air pollution, and how this pollution will affect the workers around it.
Determining implicit equation of conic section from quadratic rational Bézier curve using Gröbner basis
Authors: Anwar Y R , Tasman H , Hariadi N 
Published: November 2021

AbstractThe Gröbner Basis is a subset of finite generating polynomials in the ideal of the polynomial ringk[x1,…,xn]. The Gröbner basis has a wide range of applications in various areas of mathematics, including determining implicit polynomial equations. The quadratic rational Bézier curve is a rational parametric curve that is generated by three control pointsP0(x0,y0),P1(xi,yi),P2(x2,y2) in ℝ2and weightsω0,ω1,ω2, where the weightsωiare corresponding to control pointsPi(xi, yi), fori= 0,1, 2. According to Cox et al (2007), the quadratic rational Bézier curve can represent conic sections, such as parabola, hyperbola, ellipse, and circle, by defining the weightsω0=ω2= 1 andω1=ωfor any control pointsP0(x0,y0),P1(x1,y1), andP2(x2,y2). This research is aimed to obtain an implicit polynomial equation of the quadratic rational Bézier curve using the Gröbner basis. The polynomial coefficients of the conic section can be expressed in the term of control pointsP0(x0,y0),P1(x1,y1),P2(x2,y2) and weightω, using Wolfram Mathematica. This research also analyzes the effect of changes in weightωon the shape of the conic section. It shows that parabola, hyperbola, and ellipse can be formed by definingω= 1,ω> 1, and 0 <ω< 1, respectively.
Comparison of short runs control chart and T2 Hotelling control chart for monitoring sunergy glass production process
Authors: Qori’atunnadyah M , Wibawati  , Udiatami W M , Ahsan M , Khusna H 
Published: November 2021

AbstractIn recent years, the manufacturing industry has tended to reduce mass production and produce in small quantities, which is called “Short Run Production”. In such a situation, the course of the production process is short, usually, the number of productions is less than 50. Therefore, a control chart for the short run production process is required. This paper discusses the comparison between multivariate control chart for short run production (V control chart) and T2Hotelling control chart applied to sunergy glass data. Furthermore, a simulation of Average Run Length (ARL) was carried out to determine the performance of the two control charts. The results obtained are that the production process has not been statistically controlled using either the V control chart or the T2Hotelling control chart. The number of out-of-control on the control chart V using the the EWMA test is more than the T2Hotelling control chart. Based on the ARL value, it shows that the V control chart is more sensitive than the T2Hotelling control chart.
Implementation of mamdani fuzzy implication in predicting traffic volume and duration of green lights on an intersection
Authors: Suprayogi A , Rosyida I , Wiyanti D T , Safaatullah M.F 
Published: November 2021

Abstract
Traffic congestion at an intersection could be caused by the volume of vehicles that exceed the road capacity, the duration of the green light that is fixed, and so on. The volume of vehicles per unit time at an intersection cannot be known with certainty. Therefore, we need to predict it using fuzzy logic, specifically the Mamdani fuzzy implications. The problems are as follows: how are the input variables to be analyzed with Mamdani fuzzy implications; how are the prediction results, and how is the accuracy based on MAPE. The case study was conducted at two intersections in Semarang City. The tests were carried out using Matlab and manual calculations. The input variables in traffic volume prediction are MC, LV, HV, and time. While the input in the prediction of the duration of the green light is the number of motorcycles and cars. Based on the predictions, there are 74 vehicles (per hour) at the Kaligarang intersection in the east-north direction, there are 111 vehicles at the Kariadi intersection in the south-north direction, and the predictions are good and very accurate (measured by MAPE). The duration of the green light at the Kaligarang intersection on the west approach is 86 seconds, the duration on the Kariadi intersection on the north approach is 81 seconds, and the predictions are good and very accurate.
Forecasting approach for solar power based on weather parameters (Case study: East Kalimantan)
Authors: Hasanah P , Wiradinata S A , Azka M 
Published: November 2021

Abstract
Solar Energy is the most popular among several clean energies. As a tropical country, Indonesia has big opportunity to develop solar power, particularly in East Kalimantan which spans around the equator. Solar energy generation, however, is influenced by weather parameters which give uncertain values of the amount of the captured energy. Therefore, this research is conducted to overcome the effect of weather towards solar energy. The aim of this research is to examine the model for sun power forecasting based on the data. The Artificial Neural Network (ANN) and Multiple Linear Regression have taken as the approach models to determine energy forecasting. This study used five input variables; temperature, precipitation level, humidity, wind speed, and surface pressure, while the solar radiation was taken as the output variable. Moreover, the daily solar power and weather data from East Kalimantan has been taken along the period of 27th July 2018 – 28th July 2021. The result of this study showed that the RMSE of ANN was slightly similar with the multiple linear regression methods which were calculated by 160.26 and 160.46 respectively. However, the ANN is preferable to use in the solar energy forecasting since the tendency of nonlinearity of the climate data.