bluuebunny/crossref_metadata_2025_split huggingface dataset:
Experience of novice teachers to present mathematical problems
Authors: Ramadianti W , Priatna N 
Published: November 2019

Abstract
Mathematical problems are important in mathematics learning. Teachers should give students the opportunity to solve the problem. Novice teachers face some obstacles to present mathematical problems in their class. This study aims to describe the experience of novice teachers to present mathematical problems for their students. This article discusses the barriers experienced by novice teachers to present math problems. This research is qualitative research. The data were collected through interview five novice teachers. The results of this study reveal that novice teacher rarely present problems in mathematics learning. The low mathematical understanding ability of students are the main obstacle of novice teachers. Novice teachers assume that presenting problems affect students to be more confused. The findings of this study indicate that learning mathematics by novice teachers have not instructed students with problem-solving ability maximally. For further research, it is necessary to analyse the ability of novice teachers in preparing mathematical problems.
Student pedagogical content knowledge through project based learning models
Authors: Sumartini T S , Rahayu D V , Noordiana M A , Lurytawati I P , Mardiani D 
Published: November 2019

Abstract
Lack of Pedagogical Content Knowledge (PCK) of a teacher becomes a problem in the implementation of mathematics learning. Therefore, it is necessary to make appropriate efforts in developing PCK among students as a form of formal education and as a provision for teaching in the future. One effort that can be done is the use of Project Based Learning (PBL) models. This study uses a quantitative method with the quasi-experimental design (the pretest-posttest non-equivalent group design). The sample used was students of mathematics education study program at the Institut Pendidikan Indonesia (IPI) Garut. The results of the study show that student PCK as a prospective mathematics teacher who gets a PBL model is better than students who get conventional learning models. In addition, the development of PCK needs to be accompanied by the development of knowledge of mathematical content as a whole of the teacher’s competence in teaching mathematics.
Information systems of logistic management: a case study
Authors: Andry J F , Loisa J 
Published: November 2019

Abstract
Established in 2005, XYZ Cargo, a Freight Forwarding and an agency Company specialized in the logistic, shipping in Jakarta. Experience in both ocean freight and air freight agency which more than sixty branch of partnership around the world. XYZ Cargo has operated Information Systems (IS), IS make it possible for company to get the right output to the right people at the right time by increase the interaction between the company’s people, the data collected in its various IT/IS systems. This paper primarily deals with the role of Logistics in Jakarta. Framework of thinking used systems development life cycle (SDLC) is a method by which the systems can be developed in a systematic manner and which will enhance the probability of completing the IS project within the time deadline and maintain the quality of the IS product as per the standard. Expected from the implementation of this information systems logistic management can achieve several objectives desired by user requirement, the IS to be more effective and efficient, provide convenience in terms of process data and information. Implementation of IS compared to the manual process of recording which facilitates decision-makers to be able to monitor transactions and report in a short time.
The influence of scientific creativity and critical worksheet (SCCW) on project based learning to increase cognitive ability, scientific creative skills and scientific critical skills senior high school students on sound wave problem
Authors: Kartika S , Saepuzaman D , Rusnayati H , Karim S , Feranie S A 
Published: November 2019

Abstract
The aims of this study to determine the effect of SSCW on project based learning in improving the cognitive abilities, students’ scientific and scientific creative thinking skills on sound wave problem. The research method used is pre-experimental research with randomized control group. The research phase involves preparation, execution, and final stage. At the preparatory stage is a preliminary study, RPP preparation, and instrument validation by 4 expert validators. At the implementation stage is done in one high school in Bandung with pretest, the implementation of learning using project based learning with conventional student worksheet (CSW) and SSCW, then given the final test (posttest). The study participants were 22 students of both control class and experimental class in one of high school in Bandung. The instrument used is the instrument of cognitive ability and scientific thinking as well as scientific critical thinking skills. 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.
Enhancing students’ cognitive ability by implanting argumentation activity on inquiry lab
Authors: Siswanto  , Yusiran  , Gumilar S , Hartono  , Subali B , Muhlisin A , Juliyanto E , Trisnowati E , Farikah  
Published: November 2019

Abstract
The purpose of this study is to acquire depiction of cognitive ability enhancement which the laboratory activities based inquiry implanted argumentation activities was conducted as a main process in the classroom activities. A quasi experiment method with non-equivalent control group pretest-post-test was carried out to implement this treatment. The participants of this study were students grade XI in one of public senior high schools in Indonesia. They were divided into two groups, experimental and control group, using purposive sampling. Experimental group was provided great opportunities to conduct laboratory activities based inquiry implanted argumentation activities while control group uses laboratory activities based inquiry. In order to recognize the cognitive ability of students, an instrument was developed in form of multiple choices. This study revealed that the mean difference of two groups was significantly different in which students’ cognitive ability of experimental group was higher than this control group and was in medium criteria from normalized gain perspective. From this findings, implanting argumentation activities on inquiry lab played prominent role in constructing model and theory of knowledge for students in enhancing their cognitive abilities.
Developing the physics magazine as an alternative of personal learning media
Authors: Sulisworo D , Ristiani A , Kusumaningtyas D A 
Published: November 2019

AbstractRecently, information technology literacy of the student in school is relatively high. Efforts to provide learning services that match the characteristics of the millennium generation will be one of the solutions to utilize this technology effectively in learning. Various open educational resources will significantly enhance personal learning activities; one of them is the physics magazine. This study is development research that aims to produce physics magazine on the subject of momentum, impulse, and collision. Learning features provided in this magazine include reading the concept, enrichment reading, crossword puzzles, multiple choice, essays, practicum, and so on. Various alternative activities are provided so that students can learn from anywhere they like. Physics experts and media experts validate this media. The result scores are 3.67 for the physics subject aspects and 4.18 for the media aspects out of 5. It shows a reasonable level of eligibility. Furthermore, this magazine was piloted on 26 students to see the level of interest in physics learning using this magazine. The result is a high level of interest (4.27 out of 5). It means that student can use this physics magazine to enhance the learning interest in physics.
Identifying kindergarten children’s idea about heat and temperature concept
Authors: Qonita  , Syaodih E , Suhandi A , Maftuh B , Hermita N , Handayani H , Nurafifah R , Ningsih A R , Gumala Y , Maulana D , Samsudin A 
Published: November 2019

Abstract
This study aim is to identifying the childrens’ idea of the heat and temperature in their daily activity. Heat and temperature is the physic concept that easily found in children daily life. Knowing children idea is important to fix misconception because they bring the concept by themselves experience. A descriptive-qualitative design with observation has been implemented to gather data from 44 (5-6 years) children in three kindergartens in Tasikmalaya. The result showed that the children in early years understanding temperature as qualitative notion that they can sense rather than qualitative notion. Some case children use the same terms to describe the different temperature. This result can give description about children’s prior idea related heat and temperature to avoid or fix the misconception in the next level education.
Development of four-tier diagnostic test (FTDT) to identify student’s mental models on static fluid
Authors: Kafiyani F , Samsudin A , Saepuzaman D 
Published: November 2019

Abstract
Four-Tier diagnostic test on some previous studies are usually used to diagnose misconceptions and conceptual change. In this study, the four-tier diagnostic test (FTDT) has been used to identify students’ mental models on static fluid. Based on the mastery of students concept on static fluid, mental models will have classified into three categories: 1) initial model, 2) synthetic model and 3) scientific model. The research method utilized is the Dick and Carey model, which has four steps: 1) development of analysis diagnostic test, 2) diagnostic test design, 3) implementation and 4) evaluation. The instrument has been collected to 28 students at senior high school in Bandung. Result study shows that students mental models, which are Initial model (20.5%), synthetic-partial understanding model A (8.9%), synthetic-partial understanding model B (30.4%), synthetic-partial understanding model C (17.3%), synthetic-misconception model (11.3%) and scientific model (11.6%). It can be concluded that four-tier diagnostic test (FDTD) is able to identify student’s mental models in static fluid.
Development of computer simulation-assisted conceptual change model (CS-CCM) to change students’ conception on gas kinetic theory
Authors: Azizah N , Samsudin A , Sasmita D 
Published: November 2019

AbstractThis study aims to develop computer simulation-assisted conceptual change model to change students’ conception on gas kinetic theory. This study has been conducted to senior high school students because gas kinetic theory is an abstract concept, so that the conceptions usually increase misunderstanding and misconceptions of students. The research development has been implemented in the ADDIE development model. The ADDIE model consist of: Analyse, Design, Develop, Implement, and Evaluate. Respondents in this study amounted to 26 students (average age of 17 years old), who came from one of high school in Belitung. The test instrument used is three tier open ended questions consisting of 7 questions and the results of the test were categorized into five categories consisting of misconception (M), not understanding the concept (NU), sound understanding (SU), partial understanding (PU), and not being encoded (UC). The results show that CS-CCM can be designed and developed to facilitate change students conception on gas kinetic theory. Thus, it can be concluded that the development of CS-CCM is able to facilitate conceptual change of students’ conception on gas kinetic theory.
Investigating the ability of multiple representations and scientific consistency of high school students on newton’s laws
Authors: Furqon M , Muslim  
Published: November 2019

Abstract
The ability of multiple representations and scientific consistency are two things closely related to students’ conceptual understanding. The research has been carried out aims to find out the ability of multiple representations and scientific consistency of high school students in Newton’s laws. The multiple representations measured includes verbal, vector, motion map, graph, and bar chart representations. The scientific consistency measured is the consistency of students in correctly and consistently answering each of the three questions which presents different representations. The research method used is survey. The research instruments used were a multiple representations test consisting of 5 items to measure multiple representations ability and Representational Variant of Force Concept Inventory (R-FCI) test consisting of 27 items. The research samples consisted of 102 students from class X, XI, and XII at SMA Negeri 14 Bandung who were selected using stratified random sampling technique. The data obtained were analyzed using the Zipgrade Item Analysis Tool and R-FCI Consistency Analysis Tool. The results showed that the type of representation that is most mastered by students is vector representation and most students are categorized as inconsistent.
Computer simulation-assisted conceptual change text (CS-CCT): a FODEM study on fluid dynamics
Authors: Putra G D , Samsudin A , Saepuzaman D 
Published: November 2019

Abstract
Previously, the development of CCT has been conducted since the previous decade until current age. However, the latest version of CCT has several weaknesses in such aspects as: the visualization of abstract phenomena and it has seldom been assisted by computer simulation. This research aims to develop Computer Simulation-Assisted Conceptual Change Text (CS-CCT) by way of a continuation of the previous research combined with computer simulation. A Formative Development Method (FODEM) has been utilized to obtain a valid and comprehensive data collection. A FODEM consist of three components that are: (1) needs analysis, (2) implementation and (3) formative evaluation. Participants were occupied from 33 students who studied in one of Senior High School located in Bandung city. Participants were taken using random sampling techniques. Data obtained from the results of the pre-test using the four tier-test instruments and classroom learning. Then, the data codification technique was conducted to distinguish students based on 5 levels of conception. The result shows that CS-CCT is able to be designed and developed in term of facilitating students to change their conceptions. Thus, it could be concluded that the development of CS-CCT is able to facilitate students conceptual change on fluid dynamics conceptions.
Unveiling students’ misconceptions through computer simulation-based PDEODE learning strategy on dynamic electricity
Authors: Samsudin A , Azura  , Kaniawati I , Suhandi A , Fratiwi N J , Supriyatman  , Wibowo F C , Malik A , Costu B 
Published: November 2019

Abstract
Several misconceptions occur in the students’ conceptions especially in the dynamic electricity concept. Misconceptions is a student’s understanding which are un-appropriate with the scientific conceptions. Furthermore, if the students’ misconceptions have not been unveiled, they could be a problem in the next learning process. As a consequence, misconceptions are important faced to be changed so that students hold true conceptual understanding. In term of unveiling students’ misconceptions, we highly need the learning process which is able to make students could understand the concept themselves. Researchers have been utilised computer simulation-based PDEODE (Predict, Discuss, Explain, Observe, Discuss and Explain) learning strategy. The purpose of the research is to unveil students’ misconceptions through computer simulation-based PDEODE learning strategy on dynamic electricity. This research has been implemented using quasi experiment with pre-test and post-test group design. The sample who are involved in this research are consisted of 27 high school’s students in the one of Bandung Barat regency and they are taken by purposive sampling technique. The research result state that the frequency of students’ misconceptions decreases 0.21 in the low category. It can be concluded that the computer simulation-based PDEODE is able to unveil students’ misconceptions on dynamic electricity.
Profile of physics laboratory-based higher order thinking skills (HOTs) in Indonesian high schools
Authors: Ismail A , Setiawan A , Suhandi A , Rusli A 
Published: November 2019

Abstract
The existing physics laboratory is a pivotal part of teaching and learning physics. Several skills required by students can be facilitated by physics laboratory such as HOTs. However, the conventional laboratory that leads to verification laboratory was not successful training students dealing with HOTs. This present study investigated profile of physics laboratory-based HOTs in Indonesian high schools. A case study was conducted to take several data from participants. The participants of this present study are 12 physics teachers and 32 students in Indonesian high schools. A Questionnaire and HOTs test are used to garner the data. The finding research reveals that there four main obstacles to train and develop laboratory activities-based HOTs: the limitation of time to conduct laboratory activities, the limitation of lab space, the low ability of physics teachers in designing laboratory activities-based HOTs, and low knowledge of students dealing with concepts and laws of physics. These obstacles also support another result which depicts the low of use of HOTs lab and low achievement of students’ HOTs. A consideration of this result present study opens deep insight and wider context in a new form of laboratory activities in Indonesia that is augmented reality laboratory.
Development of basic physics experiment based on science process skills (SPS) to improve conceptual understanding of the preservice physics teachers on Boyle’s law
Authors: Saepuzaman D , Utari S , Nugraha M G 
Published: November 2019

Abstract
The study was motivated to develop Basic Physics Experiment (BPE) to improve preservice physics teachers understanding on Boyles law. The method used Research and Development (R&D) and involving preservice physics teachers as many as 18 students in the first year and 11 students in second year. This Study uses Student Worksheet (WS) based on Science Proses Skill (SPS). The conceptual understanding will be evaluated multiple choice tests for concepts Boyle Laws. The Result of the first year showed that student achievement in observation, inferring and hypothesis aspect of SPS not optimally. The result of conceptual understanding 46.67. In the second year, some activity and worksheet of SPS were develop based on the finding in the first year. Based on second year data showed improvement of SPS students and the result of conceptual understanding on Boyle Laws 78.86. Based on the results, it can be conclude that the development of basic physics experiment based on science process skills to improve conceptual understanding of the preservice physics teachers on Boyles law.
Study on Application of Optimum Index Factor in the Electric Power Benchmarking
Authors: Yao-ping Wang , ye xin Tan , Bin Song 
Published: November 2019

Abstract
Benchmarking is a widely used method of enterprise management, which can improve the management efficiency as well as the competitiveness of enterprises. In the process of electric benchmarking, a great deal of data that generated by multiple links such as power generation, transmission, substation, distribution, consumption and dispatching are not fully utilized. Accordingly, much effective information are not efficiently obtained. Aiming at this and to give a comprehensive consideration to the various factors of the power system, the method of data mining based on hierarchical optimum index factor is proposed to give priority to the development of a suitable electric benchmarking system to appraise the benchmarking professional index. This method takes various factors into account comprehensively and quantifies the development priority hierarchy of indexes. It is simple in form and also easy to calculate so that the key index can be figured out easily. Thus it can enable electric power companies to better determine the key emphasis in work, improve the efficiency of benchmarking management and fully play the role of benchmarking management.
Operating Elements of UK Electricity Contract Market and Its Enlightenment to China
Authors: Renjie Sun , Tianran Li , Jie Ding , Jinlong Zhang 
Published: November 2019

Abstract
The United Kingdom is the birthplace of the world industrial revolution. Its marketization of the power industry has been going on for more than 20 years. It is a developed country with a relatively mature power market system. The UK electricity market reform has experienced the Power P00L model, the New Electricity Trading Arrangements model, and the British Electricity Trading and Transmission Arrangements model. Since the NETA model, the UK has formed a power production-transaction-regulatory system centered on bilateral transactions. China is undergoing market-oriented reform of the power system. In order to break the monopoly, the main contents include changes in the development concept of the traditional power industry, the establishment of a new mechanism for direct trading between power generation enterprises and users, the establishment of an independent and reasonable transmission and distribution mechanism, and the opening of private capital into the electricity market, and so on. This paper introduces the reform process of the UK electricity contract market, summarizes the substantive elements and mechanism elements, lists the operation elements of the current UK electricity contract market, and analyses the structure of the UK electricity market and the bilateral electricity trading mechanism deeply. On this basis, some suggestions are put forward to further improve the construction of China’s electricity market.
Analysis on Operation Modes of Regional Integrated Energy System based on Interests Exchange Relationship
Authors: Chen ZHANG , Cuifen BAI , Yue ZHANG , Xinyang HAN , Yan ZHANG 
Published: November 2019

Abstract
Regional energy is an energy system solution designed to solve such issues as regional warm, heat, cooling and power supply and satisfy intra-regional energy demands. With the advancement of power marketization reform, newly added transaction subjects will gradually participate in such links as investment, construction and operation of integrated energy system. Considering the exchange relationship of energy, capital and service flows between various interests subjects of integrated energy system, the paper classifies the operation modes of regional integrated energy system according to the combination relationship between power generation, distribution and sales businesses, and also supplies case analysis according to actual demands.
Spatial-temporal Distribution Prediction of Charging Load for Electric Vehicle based on Dynamic Traffic Flow
Authors: SONG Yunong , LIN Shunjiang 
Published: November 2019

Abstract
On the basis of velocity-flow-density relationship and traffic-energy consumption relationship, this paper proposes a prediction method of the spatial and temporal characteristic of electric vehicle charging load using the traffic data. By analyzing the residential travel data, a probability model was built to generate trip chains of a day, which contain destination and start time. Then vehicle transfer model was used to simulate driving vehicles on the roads and SOC could be calculated by the road condition and temperature. Drivers would charge vehicles when SOC is below the charging threshold. Finally, by using the Monte Carlo method, charging load of a real traffic model was calculated according to charging demand from all electric vehicles at different time and location during the area.