bluuebunny/crossref_metadata_2025 huggingface dataset:
PBL-team teaching on developing vocational mathematics textbook
Authors: Maharani A , Darhim  , Sabandar J , Herman T
Published: November 2019

The textbook that is used today in some Vocational School in Cirebon region is a textbook of Mathematics for Vocational School from certain Publishers. Although the government once published textbooks for Vocational School, but almost no more teachers use it. Teachers generally complain about the available textbooks in terms of their practicality and effectiveness. According to them, the existing book has too broad a material coverage. In addition, there is no specific book available for use by vocational students to make vocational high school students are not motivated to learn math. This paper explores the development of mathematics textbook which can be used as one of learning resource for vocational students of competence of light vehicle engineering skill and business and motorcycle technique. The research method used is R & D. The research product was in the form of a mathematics vocational school textbook of Geometry & Measurement material designed according to the PBL model and presented through the team teaching method. The results showed that the book had a very valid level of validity. Through the use of this textbook, student can apply mathematical theory to vocational practice.
The enhancement of mathematical problem-solving skill and self-efficacy achievement through thinking actively in a social context learning model
Authors: Septiyana W , Asih E C M , Dasari D
Published: November 2019

Mathematical problem-solving skill becomes the main tool of learning mathematics to develop thinking habits and establishes students’ self-efficacy in their skill to face problems. Thinking actively in a social context (TASC) learning model is expected to enhance this skill. This research was quasi experiment by non-equivalent control group design with seventh grade students in one of Bandung Junior High School as a research subject. The number of participants was 52 students. The instruments that used were problem solving skill essay and self-efficacy questionnaires. This research generated the enhancement of problem-solving skill students who receive TASC learning model are higher significantly than students who receive scientific approach learning. Looking back for the whole piece of learning is not already become a student habit at the evaluate stage. Less accuracy of the students in understanding part of the problem indicated errors resulted from inappropriate strategy.
Problem based MHM-Strategy to enhance junior high school students mathematical creative problem solving ability and mathematical disposition
Authors: Miliyawati B , Herman T , Turmudi
Published: November 2019

This article presents the results of research on the development of mathematics learning with problem based Mathematical Habits of Mind (MHM) strategy to enhance mathematical creative problem solving (MCPS) ability and mathematical disposition. Quasi experimental research with posttest control group design involved 146 eighth grade students from two State Junior High Schools in Subang regency, each consisting of two classes. The instruments used were tests MCPS ability and mathematical disposition. Research data of students pretest, posttes, and normalized gain scores for MCPS ability were analyzed using two-way ANOVA and Mann Whitney. Based on data analysis results, it is found that there is a significant difference in the enhancement of students MCPS ability and mathematical disposition of students between the experimental and control groups at the high and medium school levels. On the other hand, there is a difference in mathematical disposition in terms of school level. Meanwhile, there is an interaction effect between problem-based MHM strategies and school-levels on the student’s mathematical disposition. Conclusion, that the enhancement of MCPS ability of students who were taught with problem-based MHM strategy is significantly greater compared conventional learning in terms of school level.
Analysis of madrasah Tsanawiyah students for statistical literacy abilities
Authors: Maryati I , Priatna N , Martadiputra B A P
Published: November 2019

Junior high school students’ low statistical literacy ability was the focus of the problem in this study. The purpose of this study was to analyze statistical literacy ability of VII grade students Madrasah Tsanawiyah Negeri 1 Kabupaten Garut Academic Year 2016/2017 in statistics material especially statistics material that is related with data distribution and data centralization based indicators of statistical literacy abilities in terms of reading statistical data, understanding the concept of statistics, communicating statistical data processing, and presenting the results of statistical data processing. The research method used in this study was descriptive qualitative study with study case design. 35 students became subjects for this study. The result of data analysis shown students’ abilities in reading statistical data given in the form of table, diagram, and chart was 35%, students’ abilities in understanding concept was 32%, students abilities in communicating data processing was 28%. As for the conclusion from the data analysis could be categorized as low because there were many students that below the minimum mastery criteria.
Analysis of students’ conceptual and procedural understanding of linear programming
Authors: Khairunnisa  , Darhim
Published: November 2019

Conceptual understanding is an understanding of theories, facts, rules, descriptions, and terminology of mathematics as well as all relevant information while procedural understanding is the procedure or set of rules (mathematical formula) to calculate or solve problems. Linear programming is a mathematical content very closely with procedural. The purpose of this study was to analyze the conceptual understanding and procedural understanding mathematics education students in the program linear material which familiar with the procedure. This research was conducted at a university by descriptive quantitative research methods using the test as an instrument for analyzing the students’ abilities of in the form of a percentage. The results showed that 1) Students could graphically depict but have difficulty in language description. 2) Less than half students were able in connecting information. 3) More than half of students able to do the step by step procedures, but only two people who remember to emphasize the answer
Is functional skills mathematics approach relevant to stimulate students’ mathematical problem solving?
Authors: Oktaviyanthi R , Agus R N , Supriani Y , Sholahudin U
Published: November 2019

This study described the stimulation structure of problem-solving skills obtained by students who were taught mathematics using functional skills mathematics approach. A descriptive exploratory qualitative approach was used to examine the students’ stimulation structure. Participants included three students from different level of mathematics ability in the second semester students of mathematics education program at Universitas Serang Raya. The data gained from the students’ problem-solving working collaborated with in-depth interviews focused on the students’ thinking refers to the functional skills mathematics completeness indicator. Exploration results showed the percentage of stimulation for each student of high, moderate and low mathematics ability are 81.8%, 54.5% and 36.7%. The relevance of the implementation of the functional skills mathematics approach was explained in more detail in the discussion.
The application of problem based learning model to improve mathematical cognitive skill and students engagement toward curved-face three-dimensional objects in IX grade of SMP Laboratorium Percontohan UPI
Authors: Hidayat A S , Haryanto D
Published: November 2019

As an effort to improve the quality of learning in the classroom, a teacher needs to consider an effective and appropriate learning model, so that it can develop mathematical cognitive skills and student’s engagement. A learning model issued in this investigation is Problem Based Learning (PBL), which is implemented to IX grade students of SMP Laboratorium Percontohan UPI. This investigation is aimed to (1) measure, (2) find out the improvement process, and (3) improve mathematical cognitive skill and student’s engagement toward curved-face three-dimensional objects using PBL model. The result of this investigation shows that the mathematical cognitive skill and students’ engagement can be improved. The average score test in cycle I is 69.9, then 81.7 in cycle II and become 85.8 in cycle III. Furthermore, this PBL model is able to improve the student’s engagement and accomplishment. In cycle I, the student’s accomplishment reach 34.37%, in cycle II reach 75%, then reach 90.625% in cycle III. From these results, the investigator concluded that PBL model can improve students’ mathematical cognitive skills and engagement. Therefore, the investigator suggests that the PBL model can be applied by teachers to other materials dan used as an alternative in learning mathematics at school.
Validation of mathematical teaching material’s developed by project-based learning integrated STEM
Authors: Priatna N , Sispiyati R , Lorenzia S A
Published: November 2019

The development of mathematics’ teaching material using project-based learning integrated with science, engineering, and technology (STEM) is a new thing to do. In its development, teaching materials through two series, namely the preparation and development then validation of teaching materials that have been developed. This research was conducted to determine the validity value of mathematics teaching materials based on project integrated with STEM. The data of this study were obtained from the assessment of mathematicians who acted as material experts and media experts to determine the face validation, content validation, and construct validation. The validation by 36 junior high school students was conducted to find out the value of content validity in each part of evaluation to ensure the learning objectives could be achieved. The results of the experts judgement and 36 junior high school students can be concluded that the teaching materials being developed have a high value of face validation, content and constructs. Based on these results, mathematics teaching materials that are developed feasible and valid for use in a broad scope of research or furthermore are worthy of being used in the learning process of teaching mathematics on appropriate topics.
The effect of counting method and learning style on students’ counting learning outcome in the mathematics lesson
Authors: Rasmitadila  , Dewi S
Published: November 2019

This study was conducted to determine the effect on counting methods namely Jatimatika counting method (JCM) and Abacus counting method (ACM) and learning styles on the counting learning outcome of mathematics lesson. This type of research was quasi-experimental with research subject as many as 60 students were selected classes that have the same categories. The data collection technique used essay test. Two-way ANOVA analysed the obtained data. The results of this study revealed that: (1) there were significant differences in counting learning outcome of mathematics between JCM with ACM, (2) there were significant differences in counting learning outcome of mathematics between students with visual and auditory, (3) there was interaction between counting method and learning style to counting learning outcome of mathematics, (4) counting learning outcomes between JCM with visual learning style greater than ACM with visual learning style, (5) counting learning outcomes between JCM with auditory learning style greater than ACM with auditory learning style, (6) counting learning outcomes between JCM with visual learning style greater than JCM with auditory learning style, (7) counting learning outcomes between ACM with visual learning style greater than ACM with auditory learning style.
The ability of pedagogic content knowledge (PCK) of mathematics teacher candidate based on multiple intelligent
Authors: Aminah N , Wahyuni I
Published: November 2019

This research is a qualitative descriptive study that analyses the Pedagogic Content Knowledge of prospective mathematics teachers in the practice of learning in secondary school Cirebon. Nine students are taken as participants of the study based on high, medium and low academic ability levels. The instruments were questionnaires and observation sheets in the form of PCK measurement instruments that had been designed for prospective mathematics teachers and were declared valid. The results of the study show that prospective mathematics teachers with high academic abilities have good abilities in compiling learning devices and PCK. For prospective teachers with moderate academic abilities are still relatively good in preparing learning tools, but the ability of PCK is still quite sufficient. Whereas prospective teachers with low academic ability are still quite sufficient in compiling learning tools and PCK abilities.
ICT media utilization model to increase science process skills on natural science lessons in junior high school
Authors: Suyatna A , Nugraha M G , Rakhmawati I
Published: November 2019

The purpose of this research is to determine the model and utilization of the information communication technology (ICT) that effectively improve the science process skill (SPS). The method used is quasi-experiment. The sample was selected using purposive sampling technique as many as 12 classes of junior high schools in Lampung Province with average initial ability were equivalent. The material that is learned is about the measurement. Data were collected using SPS observation sheet and analysed using two-way ANOVA. The first factor is ICT media model those are the tutorial and the simulation media model of measuring instrument. The second factor is the utilization model of ICT media those are the substitute-experimental, the substitute-demonstration, the complement-experimental, the complement-demonstration, the supplement-experimental, and the supplement-demonstration. The result of the research shows that there is no difference of SPS caused by the difference of ICT media model, there is a difference of SPS caused by the different model of ICT utilization. There is an interaction between media utilization model and ICT media model in terms of SPS. The highest SPS was obtained from the learning using the tutorial media model that was learned as a supplement using the experimental method.
Assimilating the Verses of Qur’an (VoQ) into Basic Physics (BP) lecture at Universitas Islam Negeri Sultan Thaha Saifuddin Jambi
Authors: Hasan H
Published: November 2019

This study endeavored to response the subsequent requests: “(1) what are the Verses of Qur’an (VoQ) that are appropriate to be assimilated into Physics Instruction Prospective Teacher Student of Universitas Islam Negeri Sultan Thaha Saifuddin Jambi (UIN STS-Jambi)? and (2) “In what subjects of basic physic (BP) can be assimilated? To this finale, percentage technique in addition to discussion stayed cast-off to gather documents from ten contributors. Contributors are physics education lecturers in BP courses as many as 3 people. All of contributors were also lectures and prospective teacher student at UIN STS Jambi. Contributors were requested to contribute their own competency on the rightness of the VoQ for assimilating in UIN STS Jambi and to give their competency in which BP these verses might be assimilated. A built survey involved of 150 VoQ was rummage-sale to convey out. Outcome of research was: Kinematics 30 (20%), Dynamics 28 (18.67%), Momentum 16 (10.67%), Work-Energy 13.67 (9.11%), Motion 15.33 (10.22%), Fluid 16 (10.67%), Heat 3 (2%), and the rest 28 (18.67%). Based on the consequences of this study, it is acclaimed that Assimilated VoQ-Physic Instruction approach might be UIN STS Jambi curricula-based.
Effectiveness of implementation interactive conceptual instruction (ICI) with computer simulation to overcome students’ misconceptions about newton’s law of gravitation
Authors: Aryani W D , Suhendi E , Suyana I , Samsudin A , Kaniawati I
Published: November 2019

Misconceptions caused by many factors, based on previous observation is the difficulty of students in visualizing or imagining the concept given, thus obstructing students to achieve the goal of physics learning. Misconceptions can occur in a variety of physics matter such as newton’s law of gravitation. This research aimed to know the effectiveness of implementation interactive conceptual instruction (ICI) with computer simulation to overcome students’ misconceptions about newton’s law of gravitation. The sample of this research are 35 students in 10th grade which choose by using purposive sampling, and the instrument used to identify students’ misconceptions is four-tier diagnostic test. The method research used is quasi experiment with research design is one group pretest-posttest design. The results show that the value of n-gain is in moderate range. So, it can be concluded that the effectiveness of implementation ICI with computer simulation can overcome students’ misconceptions about newton’s law of gravitation.
Effectiveness of OIDDE learning model with reading infusion strategy in trained 21st century students’ skills on momentum and impulse materials
Authors: Ma’rifatillah I , Efendi R , Hasanah L
Published: November 2019

The abilities that students must possess as a result of learning are to have critical and creative thinking skills, communication skills and collaborative skills. These skills are called 21st century skills. Those skills are very important to be trained during the learning process. Ones of learning models that considered effective for trained 21st century skills is the OIDDE model. To know the effectiveness of the model, we used reading infusions strategy as a comparison. after learning, students that learning with OIDDE and reading infusion models have increased and get higher score of critical thinking skills and creative thinking compared to OIDDE classes, as well as acquired skills profiles of communication and collaboration skills. Hypothesis test using ANOVA shows the average difference. The effectiveness of the model is shown by the value of d-value with the weak category.
Developing of physics practical module based on scientific method for students
Authors: Putra I Y , Dasmo D , Saraswati D L , Astuti I A D , Nurullaeli N , Bhakti Y B , Rangka I B
Published: November 2019

This research aims at developing a module for teaching Physics in high school. The research employs Research and Development (R&D) method with ADDIE model (Analyze, Design, Develop, Implement, and Evaluation). The research ends up on the Implement stage where the researchers only validate the module to the expert for it does not require the students’ responses. The module developed by researchers is Physics Practical Module Based on Scientific Method for the Tenth Grade High School Students in the Second Semester. Validation process is based on validation from the material expert, the design expert and the language expert. The validation uses Likert scale from 1 to 5, with the scale 1 of very low to 5 of very good grades. The average validation results of the three main aspects of material or content, design and language are 4.10 or 82% and is categorized as “good” category. Thus, it can be concluded that the Physics Practical Module Based on Scientific Method for the Tenth Grade High School students in the Second Semester is appropriately to be used.
Practicing integrated STEM in renewable energy projects: solar power
Authors: Mayasari T , Susilowati E , Winarno N
Published: November 2019

This paper describes students content knowledge of STEM in the process of project based learning. The selected project in this study is renewable energy (solar power), because Indonesia is located on the equator line which gets abundant sunlight as well as to popularize alternative energy in Indonesia as an effort to prevent global warming. This study was designed to determine the effectiveness of Solar Power Project to promote students content knowledge of STEM. The subjects were 28 pre service physics teachers divided into seven groups. This research used both qualitative and quantitative methods (mixed methods). Pre-test and post-test of STEM knowledge as quantitative data were conducted to determine students’ achievement and the effectiveness of learning. Furthermore, the shift of students STEM knowledge was tracked using video recording, task, reports, and interviews. Quantitative data were analyzed using a paired t test, whereas quantitative data were analyzed by triangulation of data. The results of the study showed that science content knowledge experienced the largest increase, followed by engineering, technology and the last is mathematics. Conclusion, solar power project can be helpful in enhancing students achievement of STEM knowledge and generate meaningful learning.
Using Virtual Laboratory to Improve Pre-service Physics Teachers’ Creativity and Problem-Solving Skills on Thermodynamics Concept
Authors: Gunawan G , Harjono A , Sahidu H , Herayanti L , Suranti N M Y , Yahya F
Published: November 2019

Virtual laboratories have been developed in this study as an alternative to the limited equipment of physics experiments. This study aims to examine the effectiveness of virtual lab models to improve creativity and problem-solving skills for prospective physics teachers. The research and development have been divided into 3 phases namely, preliminary study, design development, and model testing. Model testing was performed on two groups of thermodynamic courses using a pre-test post-test control group design. The instruments that have been used are creativity tests and problem-solving tests in the form of essays. Instruments of creativity include verbal and figural aspects. Each data was analyzed using t-test and normalized gain score. The results showed that there was an increase in creativity and problem-solving skills in both groups. The creativity of students of the experimental group was higher than the control group. Student problem-solving skills in the two groups differed significantly. The experimental group has a higher problem-solving ability than the control group. This suggested that the developed virtual lab model proved to improve the creativity and problem-solving skills ability of prospective physics teachers.
The influence of scientific creativity and critical worksheets (SCCW) on creative thinking skills and critical scientific as well as students’ cognitive abilities on project-based learning work and energy concepts
Authors: Wulansari R , Rusnayati H , Saepuzaman D , Karim S , Feranie S A
Published: November 2019

This study describes the influence of scientific creativity and critical worksheet (SCCW) to the creative thinking and scientific critical as well as students’ cognitive ability of Work and Energy concept. The aim of this study was to find out the improvement of cognitive ability, creative thinking skill and critically scientific students with applied model of project-based learning integrated with SCCW and conventional student worksheet (CSW). This study is based on one of the 21st Century Partnership Learning Framework which contains the skills that must be possessed by learners in the 21st century, which is focused on scientific creative thinking skills and critical scientific thinking skills. The research method used is pre-experimental research with randomized control group pretest-postest design. Implementation of SCCW on project-based learning can improve creative thinking skills and critical scientific and cognitive abilities of students with greater improvement than the application of SCW on project-based learning.
Investigating K-11 students’ mental models: An example of hydraulic system
Authors: Yulianawati D , Rahayu R , Martianingsih Y , Hasanah L , Samsudin A
Published: November 2019

Mental models aid us to comprehend the establishment of objects, the progress of the process and to assert a notion about a certain concept. This study consigns to investigating the mental model used by K-11 students in describing the hydraulic system. Research methods utilized the case study. The age of the participants is between 16th and 17th-year-olds (N = 105) of the eleventh graders in one of the Secondary Schools in West Java. The data unruffled through Two-Tier Open-Ended Tests (2TOET) was analyzed both quantitatively and qualitatively. Through quantitative analysis, the descriptive mental model is more widely used than the exploratory mental model. The results assert that the participants built a diversity of mental models about system hydraulic and almost all students including defective mental models rather than a scientifically appropriate one.
Identifying SMM on momentum and impulse using two tier diagnostic test
Authors: Nurzhimi F , Samsudin A , Kaniawati I , Fratiwi N J
Published: November 2019

Almost students have difficulties to understand the concept of momentum and impulse because the concept still considered abstract in physics. The aim of this research was to find students mental models of momentum and impulse. The participants of this research were eleven grade students of senior high school in Bandung. This sample have been selected from 30 students (17 boys and 13 girls, their age average 16 years old) in the one of senior high school at Bandung. The research method is a case study with descriptive quantitative analysis. The data analysis was carried in two stages, first identified student level of understanding and the second identified the student model of understanding. The diagnostic test utilized to find students mental models was two tier test in the form of open ended questions as many as 5 questions. The result shows that mental models of eleven grade students which have been identified in the three categories that are, Initial 62,6%, Synthetic 26,7%, and Scientific 10,7%. In conclusion, mental models of the scientific category is lower than other categories.
Analysis of students interaction on technology based Conceptual Change Text (CCT) in physics classroom
Authors: Suyana I , Sarah L L
Published: November 2019

This study aimed to analysis the interaction of student-students, students-teacher, students-material and students-learning media on Technology Based Conceptual Change Text in physics classroom. The analysis based on the frequent students interaction and was supplemented by qualitative (descriptive) data. Observation sheet was used to collected data of student-students interaction, student-teacher and student-learning media interaction. In addition, the research used student’s worksheet to collect data of student with material interaction. The finding show that there was improvement of the frequent students interaction from the first cycle to third cycle. These finding indicated that use of Technology Based Conceptual Change Text Approach in physics classroom allows for adequate students interaction with material, learning media and with other students. The result of this study can serve as reference for future studies on students interaction in physics classroom, especially using Technology Based Conceptual Change Text.
Generalized Load Modeling Considering Inverter Capacity Limitation
Authors: Haojing Wang , Zhipeng Yu , Yu Zhang , Qiuhong Zheng , Chen Fang
Published: November 2019

This paper aims at the problem of the generalized modeling considering the capacity limitation of inverter. Firstly, how the inverter capacity limitation can influence the generalized load fault response of the grid-connected point was analyzed. Then, the idea of fitting the piecewise function was proposed and applied to the training process of the generalized load artificial with neural network class model. To be clearer, fault samples were jointly trained at the same time to learn different segmentation characteristics. The modeling and simulation results show that the proposed method can improve the generalization ability and stability of the artificial neural network class model in generalized load modeling.
RETRACTED: Energy Analysis of Integrated Energy Based on Cloud Computing
Authors: Yan Du , Zhe-long Wang , Liang Guo , Zhi Zhang , Zhi-ru Chen , hongxia Zhu , Yangjie
Published: November 2019

This paper uses big data technology analysis means to abstractly identifies the common characteristics of various energy-using behaviors and analyze their behaviors; establishes user energy behavior analysis based on “multi-meter unification” information acquisition, and analyses and predicts the abnormal energy-using behavior of users according to the analysis results. So then provides a powerful means of monitoring and early warning for energy-using, increasing the level of user energy-using management, and maintaining normal order of user energy-using.
The Influence of Distributed Energy Storage on Voltage Distribution
Authors: Xu Gao , Lijun Tian , Fangheng Zhang
Published: November 2019

Distributed energy storage in the distribution network is mainly responsible for the peak load shifting, and it will also affect the voltage of the distribution network at the same time.Build the ieee33-node model with MATLAB/SIMULINK,and the distributed energy storage is connected to the node with weak voltage stability.Then analysis the influence of distributed energy storage from three aspects of access location, access capacity and access quantity.The simulation results show that the distributed energy storage connected to the distribution network can obviously improve the voltage stability and reduce line loss.
Design and Implementation of a Multi-sensor PD Online Monitoring System in GIS
Authors: Hu X L , Yong J , Yang B , Liu M L , Meng H L , Sun X B , Duan Y B , Feng X Y , Xu Y P
Published: November 2019

This paper makes a detailed introduction of the software system which is used to detect the partial discharge in GIS online and describe its superiority with open and robust features in distributed network acquisition as well as its great real-time performance. The introduction can be divided into two parts: design and implementation. Based on multi-sensors adopted and the distributed framework, the signal collection and control, feature extraction, feature storage, analysis and evaluation of the diagnostic function of PD can be realized in the system. The stability and reliability of the system has been verified by the field operation experience, which can satisfy the need of GIS online monitoring.
Strategies to Fabricate Flexible SnO2 Based Perovskite Solar Cells Using Pre-Crystallized SnO2
Authors: Liu Detao , Chen Hao , Ahmed Yameen , Li Shibin
Published: November 2019

Perovskite solar cells (PSCs) have attracted much attention since the first report. Flexible PSCs are one of the important development orientations due to its light weight. However, a low temperature process is essential to fabricate the flexible PSCs due to the deformation of the plastic substrate. Here, the pre-crystallization SnO2 colloids have been used to deposit the electron transport layer of flexible PSCs. The photovoltaic performance of flexible PSCs has been optimized through controlling the annealing temperature and SnO2 thickness. A moderate annealing temperature reduces the deformation of flexible substrates and protects the conductive layer. A SnO2 film with a suitable thickness not only blocks the direct contact between perovskite and electrode, but also transports the electron from perovskite to anode efficiently. As a result, the power conversion efficiency of the champion PSCs has been improved to 11.61 %.
Concepts, Technical Characteristics and Construction Experiences of Energy Internet: A Review
Authors: Yang Yunlu , Rui LI , Song Haixu
Published: November 2019

As the foundation and core driving force of the third industrial revolution, Energy Internet plays an important role in the energy revolution. Based on the key technical characteristics of Energy Internet, this work teases out and analyses the basic connotations, concepts, and core characteristics of Energy Internet. On this basis, taking Tokyo Electric Power Company, Direct Energy and ENN Group as examples, this work also analyses the typical cases and practice activities of Energy Internet conducted by energy companies at home and abroad, and summarizes the experiences encountered by enterprises in conducting energy Internet. Finally, all these key issues are introduced and taken as a reference for other energy companies to build an Energy Internet.
The Substation Internet of Things System based on Edge Computing
Authors: Chong Fayu , Zhenshuwang  , Li Wenqiao , Qing Yin Qing , Sun Tiantian
Published: November 2019

In response to the demand of the development of energy Internet for the comprehensive perception and wide interconnection of massive data of power system, the concept of ubiquitous power Internet of things(UPIoT), which comes from the deep integration of Internet of things technology and smart grid, has been put forward, becoming an important content and key link in the transformation and upgrading of power grid enterprises. The centralized computing mode previously adopted by smart grid can no longer meet the needs of large-scale computing and rapid response, so the ubiquitous power Internet of things should adopt the operation mode combining centralized computing and distributed computing. Firstly, this paper discusses the basic concepts and main characteristics of ubiquitous power Internet of things. Based on edge computing, this paper constructs the basic architecture of substation internet of things composed of perception layer, network layer, platform layer and application layer. Secondly, it discusses the key technologies in the construction of substation internet of things, and finally analyzes the specific application of edge computing in the construction of substation internet of things.
Heat transfer at high energy density in nuclear power plants
Authors: Komov A T
Published: November 2019

A review is given of the works of the Department of General Physics and Nuclear Fusion NRU «MPEI» in the thermophysical as applied to nuclear energy, performed over the past 30 years. Some basic results of these studies and some biliographic references are given.
Probe measurements in plasma of a rectangular hollow cathode
Authors: Andreev S N , Bernatskiy A V , Ochkin V N
Published: November 2019

With the help of the created system of probe measurements, the parameters of electrons in an inhomogeneous plasma of a rectangular hollow cathode with a discharge in helium were investigated. The local values of the plasma potential Up
, the average electron energy  and the electron concentration Ne
, and their energy distribution function (EEDF) are determined. Measurements have demonstrated significant spatial inhomogeneity. The EEDF curves have a double-peak structure, with the ratio between the maxima changing both in space and with pressure change.
About cold fusion possibilities in frame of the waveguide-resonance propagation of radiation fluxes
Authors: Egorov V K , Egorov E V
Published: November 2019

The work proposes the original possible approach for the nuclear synthesis execution on base of radiation fluxes waveguide-resonance propagation phenomenon consequences. The experimental data set obtained in frame of quasimonochromatical X-ray radiation fluxes early and the corpuscle-wave dualism conception allowed for us to suggest the principle solution of cold fusion problem going round the Coulomb barrier impeding to nuclear interaction. Short characteristics of radiation fluxes waveguide-resonance propagation phenomenon and its consequence connected with independent radiation fluxes interaction through mutual influence of radiation standing waves uniform interference fields excited by these fluxes are presented.
On the possibility of using alternative thermonuclear reactions for energy production, neutron generation and other applications
Authors: Yu Chirkov A
Published: November 2019

The possibilities of using alternative reactions D–D and D–3He in connection with the use of thermonuclear energy are considered. The prospects for alternative magnetic traps are discussed. The possibilities of using the D–D reaction in the neutron source of fusion – fission hybrid systems are considered. The physical limitations and possibilities for the D–3He reactor are discussed.
Cooling of streams of hydrogen and deuterium in relation to units for receiving cryogenic monodisperse targets
Authors: Boukharov A V , Ginevsky A F , Vishnevsky E V , Romanov G A
Published: November 2019

The purpose of work is development of the model and carrying out numerical calculations of cooling of thin jets from hydrogen and deuterium as applicable to installations for receiving cryogenic monodisperse targets. For this purpose the model of the expiration of a cryogenic jet to the low pressure area is created, the change of surface temperature and an internal jet part at different external parameters with respect to time is investigated through numerical solutions in PHOENICS software. Dependences of temperature change of liquid jets from hydrogen and deuterium along jet surface and on radius depending on jet diameter, speed, initial jet temperature and pressure in the working chamber of installations for receiving cryogenic monodisperse targets are carried out. The basic possibility of creation of high-speed cryogenic monodisperse targets is shown. According to calculations, at input of thin liquid jets of hydrogen or deuterium with a speed up to 100 m/s in the working chamber with low pressure, jets at distance up to 1 mm do not manage to freeze and can be broken into monodisperse drops. Drops are cooled and become granules due to evaporation. The developed model, the program for determination of parameters of steady monodisperse disintegration of liquid cryogenic jets and results of numerical calculations can be used during creation of installations for receiving high-speed cryogenic monodisperse targets.
Long-Duration Thermal Decomposition of Waste based upon existing coke and plasma technology
Authors: Glazkov V V , Balashov A Y
Published: November 2019

The current global problem of accumulation of municipal solid waste (MSW) and a possible way to solve it is considered. To date, there are different ways to treat MSW: recycling (processing), incineration and disposal. Each of them has its advantages and disadvantages. Waste disposal is the least environmentally safe method, but now it is the main one in Russia because of its availability. This article proposes a scheme for recycling MSW, which is based on already existing coke, energy and plasma technologies. Within the scheme thermal destruction of waste is carried out in a coke battery, and the subsequent melting of the residue is carried out using plasma technologies (in an electric arc furnace or in an open bucket with heating from the plasmatron). The plasma module, in which the melting takes place, can be implemented both with the circuit in question and attached to an existing incinerator. The result of melting is a low-grade stone that does not need to be buried. Gases released from MSW in the process of thermal destruction, after deep cleaning, are used to generate electricity. The source of thermal energy required for the operation of the proposed scheme for recycling solid waste is thermal power plants using natural gas as fuel. The interaction between the flue gases passing through the coke oven battery and leaving the TPP with coke oven gases is excluded due to the design features of the coke oven battery. This allows you to dramatically reduce the amount of gas to be deep cleaning, which significantly reduces the cost of cleaning equipment. The use of coke-oven batteries of modern design minimizes environmental pollution. The article assesses the energy consumption for the implementation of the proposed scheme for a plant processing 100 thousand tons of solid waste per year. The source of thermal energy for which is the standard unit of thermal power plants with a capacity of 500 MW. It is shown that working in conjunction with a waste recycling plant changes the heat balance of TPPs by no more than 10%.
Growth of nanostructured highly porous surface on refractory metals under plasma treatment in the PLM device
Authors: Fedorovich S D , Budaev V P , Martynenko Yu V , Karpov A V , Gubkin M K , Lukashevsky M V , Lazukin A V , Yu Marchenkov A , Gerasimov D N , Van Oost G , Sviridov E V , Shestakov E A , Voinkova I V , Gvozdevskaya D S , Rogozin K A , Zakletsky Z A
Published: November 2019

Refractory metals are irradiated with powerful plasma in the PLM plasma device which is a linear magnetic trap with a 8-pole multicusp magnetic confinement. A feature of this device is the many hours stationary confinement, which is an advantage for testing materials of the divertor and wall of a thermonuclear fusion reactor and for the development of novel plasma technologies for metal processing. Helium plasma parameters were measured in the PLM by using the reciprocated Langmuir probe. Tungsten, titanium and molybdenum test plates were tested in stationary helium discharges in the PLM during 200 minutes. The thermal load on the surface of the test plates was more than 1 MW / m2. The temperature of the plates reached 1000 °C. Scanning electron microscopy analysis revealed a stochastic nanostructured surface with dimensions of structural elements less than 100 nm. Such materials are of interest for using in nuclear, chemical and biomedical technologies.
Formation of titanium highly porous nanostructured surface under plasma irradiation in the PLM device
Authors: Fedorovich S D , Budaev V P , Martynenko Yu V , Karpov A V , Gubkin M K , Sviridov E V , Rogozin K A , Zakletsky Z A
Published: November 2019

The titanium plates were irradiated with plasma in stationary helium discharges in the PLM plasma device. The duration of discharges in the PLM installation reached 200 minutes. The thermal load on the surface of the test plates is more than 1 MW / m2. The heating temperature of the plates reached 700-900 °C. Scanning electron microscopy of the samples revealed a highly porous stochastic nanostructured surface with dimensions of structural elements less than 500 nm. Such novel material is of interest for nuclear, chemical, hypersonic technologies, as well for biotechnologies and biomedical applications.
A formation of an approach to solving the problem of selecting the composition of the included generating equipment
Authors: Andryushin A V , Arakelyan E K , Neklyudov A V , Yagupova Y Y , Drobyshev T O
Published: November 2019

The article deals with the method of formation of optimization models for calculation of modes of operation of thermal power plants, as well as the software package on which the optimization models are formed. The formed model allows to calculate the optimal combination of the whole set of combinations of compositions and modes of operation of the thermal power plant equipment.
Simulation Study of a Modified Rectangular Microstrip for the Hyperthermia Breast Cancer Procedure with SEMCAD X Solver
Authors: Lias Kasumawati , Jaffar Nabilah Abdul , Buniyamin Norlida , Basri Hazrul Mohamed , Abidin Wan Azlan Wan Zainal , Kipli Kuryati , Mohtadzar Nur Alia Athirah
Published: November 2019

A modified rectangular microstrip is introduced and presented as an applicator for hyperthermia cancer procedure. SEMCAD X solver is used as the simulation tool to investigate the rectangular microstrip, which is applied and radiated to the breast phantom. The research is carried out in order to enhance the penetration depth, which is up to 100mm and improve the focusing capability, which means that to reduce the unwanted hot spots at the vicinity area of the treated tissue. The specific absorption rate (SAR) distributions of 1 and 10 g weights of breast tissue are obtained as simulation results. The operating frequency utilized for the study is 915 MHz, with three operating powers of 10, 100, and 200 W. Beside rectangular, a circular microstrip applicator with microstrip feed line is also simulated in order to determine which shape of the microstrip applicator presented the greatest results in term of the depth penetration and focusing capability. As expected, the greatest SAR is provided by the microstrip applicator with rectangular shape. By that, the rectangular microstrip applicator is further explored and modified. From the outcomes, the rectangular microstrip with structure 4 presents the utmost specific absorption rate deposition; the required penetration depth is achieved, and focusing is enhanced with minimal unwanted hot spots at the vicinity of the treated area.
Development and Verification of Three-Dimensional Model of Femoral Bone: Finite Element Analysis
Authors: Abd Aziz Aishah Umairah , Gan Hong Seng , Nasution Ahmad Kafrawi , Kadir Mohammed Rafiq Abdul , Ramlee Muhammad Hanif
Published: November 2019

Development of reconstructed three dimensional (3D) model of bones has successfully emerged from time to time. It is used in many engineering applications especially by researchers to help them in the simulation process through finite element analysis (FEA). Besides, the 3D model can also be used by surgeons with the help of engineers, in improving their pre-surgical planning and designing of patient-specific implants or surgical instruments. Focusing on the femur, this paper proposes a method in developing a reconstructed three-dimensional femoral bone model and verifying it through analysis by using the Finite Element Method. Load of 600N was applied on the most proximal point of the femoral head under axial loading. The strain value observed in the model were 0.35 mε, 0.242 mε, and 0.146 mε. These values were slightly higher than the value measured in cadaveric specimen in the previous study, but it showed the same pattern. Hence, it can be concluded that the development method is reliable.
Low cost real-time finger flexion strength measurement system
Authors: Tan Yin Qing , Hwan Shyh Jeh , Chan Siow Cheng
Published: November 2019

Human grip strength is important in carrying out daily activities. However, the grip strength may be decreases or affected due to aging or diseases. Thus, hand exercising ball is invented as a rehabilitation device in order improve the physical grip strength. The commercial hand exercising balls comes with different stiffness which are soft, medium and hard without quantitative data. In the rehabilitation, diagnosis and intervention should be done quickly and accurately. The data are crucial for therapist to evaluate and determine the suitable treatment for the patients. A low cost real-time finger flexion strength measurement system is developed to measure the forces required to squeeze the hand exercising balls with different stiffness. The prototype is able to measure the subjects’ grip strength from four fingers without the thumb. Data collected from 10 subjects (6 healthy subjects and 4 patients) with different gender, age, height, weight and health status. The force required to grip the hand exercising ball range from 7.71N to 79.11N for soft ball, 12.80N to 104.08N for medium ball and 19.35N to 165.82N for hard ball.
Intelligent Fuzzy PD+I Controller with Stabilizer for Nano Satellite Attitude Control System
Authors: Ahmed Hani Hazza Ali , Mashor Mohd Yusoff , Mahdi Mohammed Chessab
Published: November 2019

This paper discusses the variation of proportional and derivative gains in a system under the control of PD+I controller that uses fuzzy inference method an effort is made to design the fuzzy proportional-derivative (PD) + I controller for a nonlinear the proposed fuzzy PD + I structure shows superior performance in the Nano-satellite attitude control system. Given that 2-input PD type controllers are commonly used to control Nano satellite attitude systems (Innovative Satellite InnoSAT), This paper analysis the performance of Fuzzy PD+I on satellite system. Fuzzy PD+I controller design can control Nano satellite attitude control system nicely and utilized the Fuzzy PD+I controller which optimize the stability of the Nano Satellite control system. In addition, the scheme is robust to variations in nonlinearities, as well as the steady-state gain of the plant. We illustrate the effectiveness of our scheme In MATLAB / SMULINK simulation environment.