bluuebunny/crossref_metadata_2025_split huggingface dataset:
Eleventh-grade student’s conceptions about temperature and heat
Authors: Nabilah F N , Maknun J , Muslim M , Samsudin A , Hasanah L , Suhandi A 
Published: November 2019

Abstract
The aim of case study is to identify student misconceptions of temperature and heat in senior high school. The learning process cannot be separated from the learning difficulties while students are learning Physics. Participants in this study are eleventh-grade senior high school students (14 male’s students and 16 female students) in Bandung. The instruments used were 12 multiple-choices questions on temperature and heat, embedded by the level of confidence of students answering questions. Six misconceptions about definition of heat and temperature,thermal expantion, substance phase, category transition in the form phase of objects, principle of conservation of energy and heat transfers are 73.35%, 38.35%, 20.0%, 95.0%, 58.35% and 45.6%.
Development of web based massive open online course on fundamental physics subject to increase students’ higher order thinking skill
Authors: Serevina V , Raihanati  , Sunaryo  , Andriana W 
Published: November 2019

Abstract
This study aims to develop massive open online course web vinnarrai.com as E-learning on fundamental physics subject and to increase higher order thinking skill of students. This research method used research and development by the ADDIE (Analyse-Design-Development-Implementation-Evaluation) model. The object of this study was 30 students in the physics education program of State University of Jakarta. The validation in this research used material expert validation sheet, media expert validation sheet, learning validation sheet, multiple choice questions, and higher order thinking skill questionnaire. Material expert validation results show 86.5 % (very good). Media expert validation results show 88.0 % (very good). Learning validation results show 89.0 % (very good). Based on the results of the investigation on the effectiveness of vinnarrai.com web on fundamental physics subject, obtained N-gain equal to score of 0.72 in high category. This shows the increased score of higher order thinking skill participants. Based on data above, this study showed that the development of Massive Open Online Course on fundamental physics subject can increase high order thinking Skill of Students.
Analyze of conceptions and misconceptions on pre-service teacher about light
Authors: Wahyuni A S A , Rustaman N , Rusdiana D , Muslim  
Published: November 2019

Abstract
The purpose of this study is to define a description of the various conceptions and misconceptions of pre-service teacher about the concept of light in basic physics courses. This research was conducted on 96 students of basic physics teacher candidate in one of state universities (PTN) in Makassar. The mixed method was used in this study. Data collection in this research is through observation, test, analysis of test results, limited interviews, and analysis of data by quantitative and qualitative. The result of this research is found the misconception of physics pre-service teacher about the physics concepts, especially about the light concept. This shows that the low understanding of the concept of pre-service teacher to the basic concepts of physics, causing misconception. Therefore, that misconceptions are define an information to develop a continuous research that can contribute to improving the quality of teachers’ candidates, especially physics teachers who will give a positive impact on improving the quality of education, especially in Indonesia by developing a programming of basic physics course oriented conceptual change to eliminate a misconception on physics teacher candidates.
Textbook design based on multiple intelligences with the theme of earth protector
Authors: Liliawati W , Utama J A , Ramalis T R , Waslaluddin  , Rahmansyah M A , Rochman A A 
Published: November 2019

Abstract
This study aims to describe the design of teaching materials of earth and space science subject on theme of Earth protector-based on multiple intelligence for high school students. The whole process consist of three steps, namely Define, Design and Develop. Our work will focus on design stage that consists of four tiers: constructing criterion-referenced, media selection, format selection and initial design. Our teaching material product is accommodating two integrated models, which are webbed and threated model. The webbed model is built based on twenty-eight Basic Competencies in the 2013 curriculum with theme on Earth Protector. Meanwhile, threated model underlies the meta-cognitive arrangement of book with that accommodate multiple intelligences. This teaching material integrates five subjects, namely Natural Sciences, Social Sciences, Mathematics, Islamic Education and Bahasa.
The implementation of problem based learning model with the science writing heuristic approach to increase mastery of concept and critical thinking skill at junior high school student on simple machine
Authors: Muslim  , Hakim M I , Meidawati R 
Published: November 2019

Abstract
This research aims to know the increase mastery of concept and critical thinking skill through problem based learning model with a science writing heuristic approach on simple machine. Methods of this research using pre-experimental with one group pre-test - post-test design. The subject of this research is student grade VIII at one of Junior High School in Bandung. Instrument that used for this research is a test form of mastery of concept and critical thinking skill. Improvement mastery of the concept and critical thinking skill is measured by the normalized gain. The result shows an average gain of N-gain the mastery of concept is 0.59 with fair category. And the critical thinking skill is 0.63 with fair category. The response of students to the implementation of problem-based learning models with the Science Writing Heuristic approach shows that almost all students gave positive responses. Thus, the increase of mastery of concept and critical thinking skill and at students on the simple machine through the implementation of problem based learning model with the approach science writing heuristic has improved. Student responses to the learning model that is implemented positively.
Development of basic physics experiments based on science process skills (SPS) to enhance mastery concepts of physics pre-service teachers in Melde’s law
Authors: Nugraha M G , Utari S , Saepuzaman D , Solihat F N , Kirana K H 
Published: November 2019

Abstract
This study aims to develop basic physics experiment (BPE) to improve the mastery concept in the Melde’s law. Research and development (R&D) was conducted by involving physics pre-service teacher as many as 18 students in the first year and 15 students in the second year as the research sample. Experiment were developed through the development of Science Process Skill (SPS)-based student worksheets which has been reviewed and judgment by expert, which included observing, communicating, classifying, measuring, inferring, predicting, identifying variables, constructing hypotheses, operationally defining variables, designing experiment, acquiring and processing data comes to a conclusion. The results of the first-year study showed that student’s SPS had not been trained optimally, students were still having difficulty in observing, determining experiment variables, inferring and hypotheses. This results in a low mastery of the concept in the Melde law material with a mean class score of 55.56. In the second year, the development of experiment activities was carried out by emphasizing the basic practice of SPS in the beginning of the lecture through simple experimental topics to a more complex. Based on the data processing of the second-year research showed an increase in student process science skills (SPS) and there was an increase in mastery of concept with a mean grade of 73.22. Based on the results of the study, it can be said that the development of basic physics experiment based on SPS that have been carried out can improve the mastery of the concept of in Melde’s law.
Voltage Harmonic and Interharmonic Detection Method for DC Microgrid based on Hanning Window Interpolation
Authors: Hanlin ZHU , Lijun TIAN , Dayong QI , Hui GAO 
Published: November 2019

Abstract
With the development of power electronics technology and the increasing DC sensitive load, DC microgrid is an important direction for future power distribution. At present, there are few studies on the power quality of DC microgrids. This paper introduces a DC voltage harmonic and interharmonic detection method suitable for DC microgrid. The voltage of the DC microgrid is divided into DC voltage and harmonics and interharmonics, and they are studied separately. For the DC voltage, use the regression equation to represent and restore it. For harmonics and interharmonics, the method of windowed Fourier transform is used for analysis, and the quadratic interpolation method is used for correction.Through simulation, the detection and reduction of DC voltage harmonics and interharmonics under various operating conditions are analyzed. Finally, the feasibility and accuracy of this algorithm are verified.
Preparation of Flower-Like Zn-Al Layered Double Hydroxides as Anode Materials with Improved Electrochemical Performance
Authors: Yan Xinyu , Chen Zexiang , Wang Yan , Zhang Jijun , Zhou Zhiyu , Lv Huifang 
Published: November 2019

Abstract
In this account, a facile approach for preparation of 3D self-assembled flower-like Zn-Al layered double hydroxides (Zn-Al LDHs) through a one-step hydrothermal method is demonstrated, and the resulting material is successfully utilized as negative electrodes of next-generation Zn secondary batteries. The flower-like Zn-Al LDHs possess larger specific surface area and better ion diffusion channel. Due to the unique flower-like nanostructure, the resulting flower-like Zn-Al LDHs exhibit higher charging efficiency and better cycle performance. This is concluded from the combined data of serial electrochemical tests based on galvanostatic charge-discharge tests and cyclic voltammetry (CV) tests. The galvanostatic charge-discharge tests reveals that flower-like Zn-Al LDHs maintained 95.7% of the initial specific capacity after 600 cycles.
Study on Characteristics of Different Internal UHF Sensors in GIS
Authors: Duan Y B , Zhang H , Yong J , Yang B , Hu X L , Sun X B , Meng H L , Feng X Y , Xu Y P 
Published: November 2019

Abstract
The crucial point of the UHF detection is the UHF sensor, which affects the sensitivity and anti-interference ability of the UHF detection. In this paper. the introduction of 5 different kinds of internal sensors of the Ultra High frequency (UHF) technology used to monitor the PD in the GIS was made in detail. With comparion of the external sensors, the anti-interference ability of internal sensors is much better. In order to evaluate the property of different sensors more precisely, several indicators are introduced in this paper. Furthermore, some unsolved issues about the sensot inside the GIS are presented for researchers to solve.
Study of Voltage Distribution and Radial Electric Field under Different Pollution Conditions of 500kV MOA
Authors: Wang Hui , Song Simeng , Yao Weijia , Zang Yiming , Qian Yong , Jiang Xiuchen 
Published: November 2019

Abstract
The surface of the porcelain sleeve will be polluted by local environmental pollution and weather factors such as frost, rain and snow, because of the 500kV MOA is generally arranged outdoors. The surface flashover problem of the porcelain sleeve surface caused by contamination is similar to that of the insulator surface. It is a resistor column with three sections connected in series inside the arrester. The influence of surface contamination on the voltage distribution of the internal resistor and the radial electric field between the resistor and the porcelain sleeve remains to be studied. In this paper, ANSYS is used to establish a two-dimensional axisymmetric simulation model for the surface contamination of 500kV zinc oxide arrester. The electric field distribution of the surface of the arrester is cleaned, evenly polluted and the local drying zone appears. The results show that the uniform contamination is inside the arrester. The electric field has little influence, and the local drying zone will form a locally excessively high radial electric field between the resistor and the porcelain sleeve. Under the reference voltage, the radial electric field exceeds the corona starting field and causes corona discharge, and the acceleration resistor Deterioration of the sheet and the dielectric; the voltage of the resistor piece near the local drying zone is increased to a certain extent, which also accelerates the aging of the resistor chip and jeopardizes the safe and stable operation of the arrester
UPIoT Intellisense Laboratory Scenarios
Authors: WANG S. J. , FU X. F. , XU P. , He T , SONG H. 
Published: November 2019

Abstract
To improve the quality of intellisense facilities, UPIoT intellisense laboratory, the very first lab of UPIoT field, is found. The principles of laboratory including standard test, defined procedure, transparent process, shared information, open construction and international practice. Based on the principles, five main research directions are confirmed. The omnibearing performance verification of intellisense facility and performance criterion and verification of new facility are the cores of laboratory. The laboratory is the quality control basis of UPIoT.
Development of an experimental setup for studying heat removal by a dispersed flow
Authors: Zakharenkov A V , Demidov A S , Tupotilov I A , Shteling V S 
Published: November 2019

Abstract
The work provides description of a new test bench for the cooling efficiency of a working area with a high energy density using a two-component dispersed coolant flow. The pneumatic atomizer design and a scheme of the working area, cooled by a two-component dispersed flow are described. A measurement method of the working area wall temperature is proposed. Arrays of primary test data are obtained for coolant operating parameters p
water = 2, 0·105 Pa, p
air = 1, 6·105 Pa, G
water = 0, 042 kg/c; G
air = 1, 6·10−3 kg/c.
Development of the experimental stand for research heat removal with a high power density by a dispersed heat carrier flow
Authors: Komov A T , Sherbakov P P , Ilyin V V , Smorchkova Yu V , Shteling V S 
Published: November 2019

Abstract
A schematic and measuring diagram of an experimental stand has been developed for research heat removal with a high power density by a dispersed heat carrier flow. Methods for measuring thermophysical and electrical parameters are determined. The design of the experimental chamber is developed. The scheme and design of the induction heating system and steam condenser have been developed. An experimental setup for research the evaporation time of a droplet has been created. An experimental study of the droplet evaporation time was carried out. The experimental data were processed and compared with the theoretical dependence.
Acoustic impact on electric discharge parameters during sterilization of freeze-dried products
Authors: Ya Asadullin T , Galeev I G , Sofronitskiy A O , Gizeev M M 
Published: November 2019

Abstract
The possibility of using a gas discharge plasma for sterilization of freeze-drying products directly in the process of their vacuum packaging for long-term storage is considered. An alternating current electrical discharge was used as a source of sterilizing action. In order to increase the homogeneity of the processing of the products, sound waves were applied to the electrical discharge. The effect of acoustic effects was investigated in the pressure range from 10 to 100 Torr, and the sound frequency from 50 to 400 Hz. A noticeable effect of sound waves on the discharge behavior was identified and optimal conditions were determined for increasing the uniformity of the sterilizing effect on the processed products.
Determination of the recovery heat flux at superfluid helium film boiling in different conditions
Authors: Puzina Yu Yu , Kryukov A P 
Published: November 2019

Abstract
The calculation of the recovery heat flux density is considered for different conditions to investigate heat mass transfer processes. System of equations is based on the methods of continuum mechanics and molecular kinetic theory. Pressure distribution in the liquid is determined by the hydrostatic difference. At the vapor-liquid interface the Laplace formula is used. The vapor pressure in the film is determined by the non-equilibrium effects in the vapor near the interface. Heat transfer in a liquid is described by the Gorter-Mellink semi-empirical theory. Experimental data on the boiling of superfluid helium under various conditions are interpreted based on the formulated mathematical model. For all cases in the considered range of parameters, the qualitative and in some cases quantitative agreement between the calculated and experimental values of the recovery heat flux were obtained.
The application of RF inductively coupled plasma torch for the enrichment of natural quartz
Authors: Grishin Yu M , Miao L 
Published: November 2019

Abstract
Numerical simulations of the dynamics of the heating of polydisperse quartz flow in the plasma and the thermal stresses arising in quartz particles are performed. As a plasma source, an RF inductively coupled plasma torch with axial supplies of plasma and sheath gases is considered. The RF inductively coupled plasma torch with 3-turns works at a generator frequency of 3 MHz and an electrical power up to 10 kW. Polydisperse quartz flows (carrier gas and quartz particles) are introduced into the plasma after discharge zone through the azimuthally symmetrical annular channel at an angle of 60° to the axis of the plasma torch. Pure argon and its mixtures with hydrogen (with a volume fraction of up to 5%) are considered as working gas.
Probe characteristics of probes from different materials in glow discharge in helium
Authors: Prokhorova E I , Platonov A A , Ignakhin V S , Nazarov A I 
Published: November 2019

Abstract
Dust plasma is of particular interest due to the wide technological application and extraordinary properties. Probe method is often used for plasma diagnostics [1, 2]. At the same time, a probe is similar to a dust particle and there are emission streams on its surface, which make corrections to determination of plasma parameters. Despite essential development of the probe theory, when calculating plasma parameters for experimentally received volt-ampere characteristics emission of electrons is not considered, in many respects because of serious complication of the mathematical apparatus. The authors present the probe characteristics of probes from different materials in glow discharge in helium. The analysis of the chemical composition of the probe material is made. It has been shown experimentally that the material of the probes and the state of their surface (degree of roughness) have practically no effect on the results of probe measurements.
Method and device for applying protective coatings to heat exchange tubes of system heaters
Authors: Chugunkov D V , Seyfelmlyukova G A , Skurikhina A D 
Published: November 2019

Abstract
During exploitation of heat exchange equipment, the inner surface of tubes is exposed to the working environment negative effects, that leads to corrosion, abrasion and destruction. Currently, an urgent task is to develop a technology for recovery and protection of heat exchange tubes without complete replacement of the tube bundle, that will allow to reduce repair costs and improve the heaters’ efficiency. Existing devices for applying protective coatings have a number of flaws: bulkiness, low mobility, the need to use a 380 V network, the inability to use photopolymers. All these factors limit possibility to use these methods and devices. In order to eliminate such drawbacks, the present work developed a special device, allowing to protect and restore damaged surfaces of heat exchange tubes.
Model of sputtering of binary homogeneous targets by light ions bombardment
Authors: Manukhin V V 
Published: November 2019

Abstract
An analytical model of the sputtering of binary homogeneous targets by light ions bombardment has been developed, an analytical formula has been obtained, which makes it possible to calculate the total and partial sputtering coefficients of a binary (multicomponent) target by light ions bombardment. The calculation results are in good agreement with the experimental data. The patterns of preferential sputtering of two-component materials at low energies of bombarding ions are revealed.
Experiments with tin liquid-metal capillary porous system in the PLM device
Authors: Budaev V P , Fedorovich S D , Lyublinsky I E , Vertkov A V , Van Oost G , Martynenko Y V , Lukashevsky M V , Karpov A V , Lazukin A V , Yu Marchenkov A , Gerasimov D N , Gubkin M K , Shestakov E A , Voinkova I V , Gvozdevskaya D S , Rogozin K A , Zakletsky Z A 
Published: November 2019

Abstract
Plasma tests of a tin capillary-porous system (CPS) were carried out on the PLM plasma device. This CPS is made similar to the lithium CPS used in experiments in tokamaks T-10, T-11M. The CPS system was immersed in the PLM plasma device and tested for 3 hours in a stationary helium discharge with plasma load of 1 MW / m2. The tin CPS has not damaged after such plasma load suggesting it as plasma facing component in fusion reactors and plasma engines.
The influence of the working fluid type on the parameters of the ion engine
Authors: Laharev D A , Lukyantsev D S , Tupotilov I A , Yamaev A M 
Published: November 2019

Abstract
Nowadays, the level of technological progress, the foundations of which were laid in previous decades, has made it possible to practically master the use of near-earth orbits and conduct separate research trips beyond them. Further steps, including expanding the functionality of space vehicles in near-Earth orbits, the creation and regular operation of a lunar space base, large-scale planetary and other bodies of the solar system exploration, and sounding of deep space, requires, first of all, a sharp increase in the capabilities and efficiency of space transport systems. A further increase in the flow rate of the working fluid requires an increase in its specific energy content, that is, conversion to a plasma state, which is implemented in ion engines. In ion engines, ion beams are accelerated in an electric field organized by electrodes. The volume charge in the accelerating gap is not compensated; this serves as one of the restrictions on the current density in such a beam. In the present work, we took hydrogen, deuterium, helium, nitrogen, argon, krypton, xenon as the working fluid, for which the dependences of the optimal ion emission current density on the distance and voltage between the electrodes of the accelerating gap, breakdown voltage of distance between the electrodes, specific thrust of the specific impulse, specific impulse of the mass number of ions and others were calculated, and the most promising and effective working fluid was determined.
Influence of True Diffusion Coefficient on Hydrogen Diffusion in Tungsten in the Field of Defects
Authors: Pisarev A , Giniyatullin B 
Published: November 2019

Abstract
Numerical calculations of thermal desorption spectra, permeation, and accumulation of hydrogen in radiation damaged tungsten have been made using two approximations for the diffusion coefficient: the commonly used approximation of Fraunfelder and that of Heinola, which he proposed to describe only the most high temperature data of Fraunfelder.