bluuebunny/crossref_metadata_2025_split huggingface dataset:
Developing of teaching materials for junior high school students based on ethnomathematics on traditional woven cloth (Tembe Nggoli) of Mbojo tribe
Authors: Sowanto  , Mulyadin E 
Published: November 2019

Abstract
This research is based on the absence of teaching materials about the concept of geometry that is able to facilitate the students connecting the culture, especially tembe nggoli which is one of the traditional woven cloth of mbojo-NTB with the concept of mathematics. Ethnomathematics is a mathematical bridge with culture, and ethnography recognizes the different ways of doing mathematics in community activities. The result of this study is to produce teaching materials in the form of students’ worksheets. The method used is design research which includes: (1) preliminary design, in this phase is made Hypothetical Learning Trajectory (HLT); (2) experiments, in this phase existing designs are tested to students; (3) retrospective analysis, in this phase the researchers compare the HLT with the actual student learning process. The results of this research showed that tasks which were presented in teaching materials by considering learning obstacle and preliminary study able to facilitate students to define the properties of triangles based on their angle.
Comparative study of laboratory management capability among physics students at UIN Sunan Gunung Djati and UIN Sunan Kalijaga
Authors: Chusni M M , Hasanah A , Ghazali A M , Zakwandi R , Nurzaman R F R , Nurfauzan M F , Dirgantara Y , Agustina R D , Malik A , Samsudin A 
Published: November 2019

Abstract
The aim of this research is to compare the laboratory management capability of the students in the physics education department at UIN Sunan Gunung Djati Bandung and UIN Sunan Kalijaga Yogyakarta. The research method is used comparison method between two groups subject. The comparison is doing to describe the readiness of physics education department to prepare their students become a professional pre-service physics teacher. Subjects in the research are students of physics education department at UIN Sunan Gunung Djati and UIN Sunan Kalijaga that choice used purposive sampling method. The data of management laboratory capability were collected by spreading the instruments in the form of a multiple choice test and analyze used t-test method. Result of the study show that sig 0,488 > 0,05 that indicated the subjects have not differences. The analyze of the levels of difficulty is shown that each of the subjects group does not have a significant difference in value. Generally, the researchers conclude that not have significant differences among the student capability. Other than, this study also indicates that the lecture of management laboratory must be improved to increase the levels of graduation capabilities.
An investigation of students’ misconceptions about momentum and impulse through interactive conceptual Instruction (ICI) with computer simulation
Authors: Triyani G , Danawan A , Suyana I , Kaniawati I 
Published: November 2019

Abstract
Learning of physics always related to conceptual understanding. In the learning process, there can be a difference in conceptual understanding that causes misconceptions. Misconceptions can occur in a variety of physics material, including on momentum and impulse. The purpose of this study was to investigate students’ misconceptions about momentum and impulse through Interactive Conceptual Instruction with computer simulation. This study was conducted to 10th grade consists of 30 students. The sampling technique is purposive sampling. The method used is quasi-experimental with research design is one group pre-test and post-test. The instrument used to investigate students’ misconceptions is form four-tier diagnostic test. The result shows that misconceptions before treatment higher than after treatment. It can be concluded that Interactive Conceptual Instruction with computer simulation is better in facilitating student learning process on momentum and impulse.
Implementation of levels of inquiry to improve sound wave concept mastery in junior high school
Authors: Ariantara R G , Utari S , Karim S 
Published: November 2019

Abstract
The low mastery of physics concept was caused by a lack of experimental abilities in the learning process. Levels of Inquiry (LoI) is an appropriate step for develop experimental abilities because it has a systematic, structured stages, and it can flexibly applied to the various dominancy of students and teachers role according to conditions. This study was conducted to observe students sound wave concept mastery improvements after the implementation of LoI in learning. The study used one group pretest-posttest design, which involved 152 students in one of public junior high school in Bandung. Instrument used in this study was descriptive concept mastery test. Data were analyzed using t-test and normalized gain to determine the improvement of student’s mastery concept. The results showed that students sound wave concept mastery improvement was improved by Levels of Inquiry in overall (<g> = 0.38). The results also included detailed analysist of student’s concept mastery development by general, each cognitive aspect and each sub matters of lesson. Based on the results, Levels of Inquiry (LoI) implementations can improve the student’s concept mastery on sound wave.
The development of PDEODE*E task based three stay two stray on static fluid
Authors: Rahmi RA , Samsudin A , Imansyah H 
Published: November 2019

Abstract
Misconception occur due to several factors, including students, teachers, content of book or teaching materials, and learning models and strategies used. Learning models and strategies greatly affect to the ability of student’s understanding of the concept. Low conceptual understanding can easy make the students being misconception. Therefore, the purpose of this research was to developing PDEODE*E task based one of cooperative learning model type on static fluid material. This research used 4D method (Define, Design, Develop, Disseminate) and this research restricted on static fluid conceptual. Participant in this research are 25 XI grade students on science program. This research used effect size to analyze the impact of PDEODE*E task based three stay two stray to reduce the students’ misconception. Results shown that the value of effect size is 1.09 with “large effect” interpretation. It’s mean that PDEODE*E task based three stay two stray is effective to use on learning activity in the classroom to reduce student’s misconception on static fluid.
Whats wrong with cookbook experiment? a case study of its impacts toward learning outcomes of pre-service physics teachers
Authors: Yusiran  , Siswanto  , Hartono  , Subali B , Ellianawati  , Gumilar S , Sartika D 
Published: November 2019

Abstract
Cookbook experiment is familiar type of experiment in which students have to follow some procedures to carry out a practicum in laboratory. Due to its easiness, not only students in high school but also students in college recognized this. However, there is no clear role of cookbook experiment toward learning outcomes of pre-service physics teachers. This study investigates the impact of cookbook experiment toward learning outcomes. A single case study was carried out in one private university in east Indonesia in which all participants were students from physics department. The finding results reveals that cookbook experiment was used almost eight years. This affected two pivotal aspects of students: achievement of cognitive learning ability and students’ interest toward learning process. In these aspects context, the cookbook experiment did not facilitate students who are pre-service physics teachers to construct and strengthen deep understanding, to make a joyful and meaningful learning process, and to flourish the diverse skills needed by students such as higher order thinking skills. This article indeed presents a consideration of the implication of physics practicum in Indonesia in deep insight and wider context.
A preliminary study: how is extent the fourth-grade students understanding of the magnetic force?
Authors: Ningsih A R , Afifah R N , Qonita  , Gumala Y , Handayani H , Suhandi A , Syaodih E , Maftuh B , Hermita N , Samsudin A 
Published: November 2019

Abstract
This study purposes to identify about elementary level understanding of the magnetic force over experiential learning. The indicator of understanding aspect used purposes to extent students’ understanding of the elementary school. The indicator that used in this study is a Bloom indicator. A descriptive-qualitative design and random sampling have previously been pretentious to accumulate data from fourth grade elementary students in one of Bandung Regency (27 participants: 9-10 years old). The instrument which is operated designed multiple choices with interview process. The significance shows that every aspect of understanding such as: modelling, classifying, comparing, explaining, and estimating students have dissimilar results. The students’ understanding mostly lies in the indicators of the aspects of understanding the exemplifying part. Toward entirety up, students’ understanding of elementary school is stumpy and necessities to be enhanced.
Analysis of earth and space science curriculum at senior high school
Authors: Cahyati I , Liliawati W 
Published: November 2019

Abstract
This study aims to describe the curriculum of earth and space science at junior and senior high schools. The approach of the research is qualitative with literature review methods. The source of data used in this study is regulation minister of national education number 22 of 2006, regulation minister of education and culture number 69 of 2013 and regulation minister of education and culture number 24 of 2016. The results of the analysis obtained the provision material of earth and space science of education unit level curriculum at senior high school for physics by 2.63% and geography by 19.23%. Furthermore, the 2013 curriculum for Physic by 6.45% and geography by 26.30% and 2013 curriculum of revised edition for physics is 5.88% and geography is 27.78%. Based on the results of the analysis, there are changes in the structure of curriculum content for senior high school such as in education unit level curriculum, material of global warming is not given. While after the curriculum existence changes into the 2013 curriculum and 2013 curriculum of revised edition, the material of global warming is given in class XI of physics.
K-10 students’ conceptual understanding on Newton’s laws: current and future directions
Authors: Hermanto I M , Muslim M , Samsudin A , Maknun J 
Published: November 2019

Abstract
The aim of this research to obtain a profile of K-10 students’ conceptual understanding on Newton’s laws. In fact, not only student conceptual understanding is at a low level but also high-order thinking skills. This research is qualitative research with a case study method and using embedded, single-case design. Moreover, students’ conceptual understanding is measured based on indicators explaining, comparing, inferring and interpreting. This research has already implemented to K-10 students (13 male and 21 female students) in Bandung. The results report that students’ conceptual understanding for each indicator was such as explaining, comparing, inferring and interpreting is generally insufficient category. It can be concluded that students’ conceptual understanding on Newton’s law is still low.
Identification of misconceptions on global warming material: impact and solutions at middle school
Authors: Hamzah K , Liliawati W , Samsudin A 
Published: November 2019

Abstract
This study aims to identify the misconceptions of global warming material: impacts and solutions using the three-tier test diagnostic instrument. The Earth and Space Science material in the global warming chapter of the 2013 curriculum was given to the second semester of class XI so it was very new for high school students. The object of this study was 61 high school students of class XII who were scattered in two schools in Bandung, West Java randomly. The results of the analysis obtained the percentage of students who experienced more misconceptions compared to students who had scientific conception of 40.2%, while students with scientific conception were 36.6%, with the lack of knowledge 16.5% and error 6.7%. The percentage of students who experienced more misconceptions in the submission of solutions to global warming from the submersion of the impact of global warming was 45.74% while the submersion of the impact of global warming was 31.85%. These results indicate that students still experience misconceptions in Earth and Space Science material due to learning methods and the use of teaching aids that are still lacking.
Problem based learning in mechanical engineering to train student’s creativity
Authors: Setyowidodo I , Sutanto  , Handayani A D , Mahmudi H 
Published: November 2019

Abstract
Creative thinking skills is highly significant thinking skills that will be increasingly necessary because of the increase in complex problems caused by the rapid development of technology and social movements worldwide. Therefore, educators should train the creativity to their students in order to enable their success as future citizens. Student creativity is very important in the teaching and learning, its because every student are unique, so they are always have their own creativity. PBL should be implemented in various disciplines, such as in Mechanical engineering Programs. Using a problem-based learning approach is an alternative and effective way to introduce, discuss, and learn about a given (creativity) topic or concept. The purpose of this learning model develops high-level thinking skills in problem-oriented situations and integrates new knowledge to train student’s creativity, providing authentic issues and meaningfully emphasized real time data from websites. This type of research is a quasi-experimental research with Pre-Test - Post Test Experimental design. Implementation of development procedures in this study include (1) research and information collection; (2) planning; (3) development of initial product form; (4) field test and product revision; (5) revision of the final product; and (6) dissemination and implementation. Data collection using test, observation, documentation and interview techniques. The quantitative data analyse with one sample t test. Real time data is information delivered immediately after the observation or data collection, various real time data can be collected through the address of the website in the internet. The module product in this study is a learning model device that integrates real time data to train student’s creativity. This study shows that the implementation of Problem Based Learning can enhancing the creativity of Mechanical Engineering Students Program in Universitas Nusantara PGRI Kediri.
Polytype Dynamic Reactive Power Equipment Planning Method for Receiving-End Power Grid
Authors: Jin-min CHENG , Wei-yuan WANG , Ji-liang XUE , Xuan YU , Gao-wei LIU 
Published: November 2019

Abstract
Due to the interaction between AC and DC systems, the multi-DC feeding receiving-end power grid is prone to have safety and stability problems. Reactive power equipment can improve the transmission capacity of power grid at the same time avoid voltage drop which is gradually applied in receiving-end power grid. In this paper, a polytype dynamic reactive power equipment coordination optimization model based on static and transient voltage stability is proposed, which can be used for dynamic reactive power planning of receiving end power grid to satisfy the safety and stability standards and the minimum investment scheme limited by installation conditions. The guiding significance of the model for dynamic reactive power planning is illustrated by an example of the reactive power planning for the south Suzhou power grid in East China.
Optimal Operation Management in A Micro-Grid System Using Particle Swarm Optimization
Authors: Karrar Waleed , Zhen Zhang , Mohammed Ebrahim , Ismael Waleed M , Zengwei Zhu 
Published: November 2019

Abstract
Due to increase, the electricity demands and the cost of energy generation to cover the living requirement of modern societies, micro-grid (MG) has been established and played an important role to solve the problems of intermittent. This study focused on implementing the analytical algorithm for calculating the difference between generated units and consumed units under the control of the State of Charge (SOC) value and applied the Particle Swarm Optimization (ANALYTIC-PSO) algorithm to optimize the value resulting from the difference between generated units and consumed units. The simulation was performed using the python environment and the PSO algorithm converges to final state approximately after the 10th iterations. The results showed that the proposed approach is efficient compared to Grey Wolf Optimization (GWO) algorithm.
Realization of Sequential Control Function Based on Bay Level Equipment in Smart Substation
Authors: Wen Bo , Chen Hong , Hengxuan LI 
Published: November 2019

Abstract
In view of the problem of low reliability and automation of advanced application functions such as sequential control in smart substation, the logic configuration mode of sequential control is analyzed based on the principle of logic virtual circuit of bay level equipment in smart substation, and the realization of sequential control function based on bay level equipment is proposed. This method improves the operational reliability and configuration flexibility of sequential control, and fundamentally solves the technical application problem, so as to improve the intelligent level of power grid.
Study on Minimum Inertia Demand of System Considering Frequency Stability of MIDC Power Grid
Authors: Liang CHENG , Weiyuan WANG , Guang XU , Xuelian WU , Fei DOU , Jinmin CHENG , Hui CAI 
Published: November 2019

Abstract
The increase of UHVDC feed capacity and the grid-connected capacity of distributed new energy lead to increasingly prominent frequency stability problem of MIDC (Multi-infeed DC) grid. Based on the simplified frequency analysis model, it theoretically analyses the influence of system inertia reduction on frequency stability under high power disturbance fault. A method for estimating the system synchronous inertia demand that meets the requirements of safe and stable operation of the system is proposed. The correctness and reliability of the proposed method are verified based on the time domain simulation data of the East China Power Grid.
Comparative Study on Power Oscillation Disturbance Source Location Method Based on Oscillation Energy Flow
Authors: Guo Siyuan , Zhang Shoushou , Zhu Weijun , Song Junying , Yan Yabing 
Published: November 2019

Abstract
With the rapid development of the wide area measurement system (WAMS), the disturbance source location method based on oscillation energy has been widely used in low frequency oscillation monitoring. This paper focuses on the applicability research of different oscillation energy methods. Taking the forced power oscillation caused by the excitation system abnormality as an example, the disturbance source location accuracy of three oscillation energy methods is compared. The results show that it is important to extract the dominant component of the electrical signal. When the non-dominant component content is large, it will affect the location accuracy of the traditional oscillation energy method.
Urban Distribution Network Operation Risk Index System and Calculation Method
Authors: Chao PEI , Dalei Wang , Xiaofeng Wang , Mengbing RAN , Man Wang 
Published: November 2019

Abstract
A reasonable index system is an important basis for risk assessment. Firstly, aiming at the shortcomings of the existing index system establishment and evaluation methods, combined with the structural and operational characteristics of urban distribution network, a risk index hierarchy including load loss, grid structure integrity, equipment loss and grid security margin is proposed based on the construction principle. Then, the calculation methods for the consequences of each risk index are given from the perspective of facilitating engineering application. Finally, the application example of power grid in a city is given.
Analysis of Power Service Bandwidth based on AHP and Clustering
Authors: Yiming Chen , Hechun Zhu , Shiying Yao , Yunyang Huang , Jingru Liao , Jie Xu 
Published: November 2019

Abstract
The current method of analyzing the relationship between communication service and bandwidth requirement in the power communication network is simple. It uses a single formula with predetermined constant parameters to calculate the bandwidth of each communication service for a given site which can not show the relative bandwidth demand of different services. This paper proposes a combined AHP and hierarchical clustering method to analyze the relative bandwidth requirement of each service. This method is based on AHP to analyze the impact of different factors on bandwidth and use hierarchical clustering method to aggregate services with similar communication needs into the same class, and it shows different services’ relative bandwidth requirement clearly. Experiments on data of various site shows that all the services with similar bandwidth requirements are grouped into the same class.
Fast Reliability Assessment Algorithm of Distribution Network based on Topological Similarity Analysis
Authors: Liu Hao , Zeng Qinghui , Liu Shaohui , Wu Zhuojun , Li Lei , Ma Rongrong 
Published: November 2019

Abstract
In this paper, the concept of topological similarity is introduced to realize a fast and accurate reliability assessment of distribution network. Based on the singular value sequence as the similarity index, the mathematical relationship between similarity of network topology and power supply reliability of distribution network is developed. Firstly, the matrix representation, similarity index and its determination method of distribution network topology are presented, while the compression and reconstruction of matrix are analyzed to ensure the topological characteristics of adjacent matrix. Then, a fast reliability assessment algorithm of distribution network based on topological similarity is proposed, which uses root mean square method to determine similarity according to topology database and updates reliability indexes, together with the calculation flow. Lastly, case study of IEEE 33-node distribution network is undertaken, which shows that the calculation efficiency of the proposed algorithm is seven times higher than that of other conventional algorithms under the same calculation accuracy.
PV Prediction based on PSO-GS-SVM Hybrid Model
Authors: Hongmei KONG , Huibin SUI , Peng ZHANG 
Published: November 2019

Abstract
Photovoltaic power generation is affected by many factors, with volatility and intermittent characteristics. Large-scale photovoltaic access to the power grid poses great challenges to the safety and stability of power systems. Therefore, accurate prediction of photovoltaic power generation helps dispatchers adjust scheduling schedules in a timely manner, effectively reducing the adverse impact of photovoltaic power generation access on the power grid. This paper proposes a hybrid PV power prediction model based on PSO-GS-SVM. The particle swarm optimization (PSO) method is used to optimize the large step size of the support vector machine (SVM), and the parameter optimization range is obtained. GridSearch Method (GS) refined parameters optimization of PSO-SVM, and obtained PSO-GS-SVM hybrid model. The model is used to train and predict the normalized and dimensional sunny and non-clear working conditions data sets, and compared with BP neural network, SVM and PSO-SVM models. The results show that the PSO-GS-SVM hybrid model has better generalization ability and higher fitting effect.