bluuebunny/crossref_metadata_2025_split huggingface dataset:
The analysis of the discovery learning implementation and its affect to the students conjecturing skills in solving a resolving domination number
Authors: Kurniawati S , Slamin  , Dafik  , Wangguway Y , Hayyu A N 
Published: June 2020

Abstract
Abstrak. Conjecturing plays a role in mathematics learning, namely: (1) conjecturing as a way of solving problems (2) conjecturing as a process that helps students in understanding material, and (3) conjecturing as a process that trains students in reasoning. One learning model that can be applied in lectures in order to improve students’ conjecturing skills in solving expected mathematical problems is a discovery learning model, this paper will describe the development of learning material using discovery learning models and the implementation to know the effect of student conjecturing skills on combinatorics problems. The problem will be focused on discrete modeling with dominating metric dimension number studies. Further we analyze their conjecturing skills by using a triangulation methods, namely a combination of qualitative and quantitative methods. The subjects of this study are students majoring in Mathematics Education at Jember University. Research subjects using experimental class and control class. The result are 22% of students in the control class have fulfilled the completeness criteria study. While in the experimental class there are 29% has met the criteria for mastery learning. It means after the application of discovery learning, the students conjecturing skills are improved signicantly. Overall the results of the study indicate that the stages in conjecturing skill were done sequentially although not all steps were done.
The shadow reckoning problem from ancient society as context for learning Trigonometry
Authors: Fachrudin A D , Ekawati R , Kohar A W , Widadah S , Kusumawati I B , Setianingsih R 
Published: June 2020

Abstract
In this article, we explore the shadow observations and reckoning from various ancient societies, especially form china and medieval Islam, as inspiration in developing a learning design. We used the evolution of trigonometry from old shadow reckoning techniques to arrange instructional tasks for tenth-grade secondary education students and analyse how its role in supporting students’ understanding of trigonometry. We choose Design Research as a method to reach the purpose. However, we restrict our discussion to a part of one phase, namely pilot experiment, from three main phases of design research. The idea of the learning design is involving students in old mathematical activities that concern with concept of shadow ratio as the beginning of basic trigonometry. This research was involving six Indonesian high school students. We developed an instructional design which consists of several activities’ that begin with solving history-based problem using Chong Cha procedure (double difference) from ancient china, where the calculation method is using shadow assistance from two poles as a gnomon to determine the height or depth and distance of an inaccessible object (e.g. mountains or valleys), and followed by solving a problem by using a tool and method from medieval Islam in the surveying process which is actually also developed from the concept of shadow calculations. The result indicated that the use of ancient problems and method can provide valuable insight for the students and give them an opportunity to learn the trigonometric ratio meaningfully. Furthermore, by using history as a context, students got more opportunities to improve their mathematics literacy performance through formulating various contextual mathematics problems into formal mathematics form.
An analysis of problem solving ability in linear equation systems with two variables
Authors: Mustofa B , Mardiyana  , Slamet I 
Published: June 2020

Abstract
Problem-solving is one of the mathematical abilities that students must possess. This study aims to analyze and describe students’ problem-solving abilities in the linear equation systems with two variables as consideration for improving the quality of learning. This type of research is descriptive qualitative. The subjects of this study were 20 tenth grade students of SMA Negeri 1 Comal. They were taken by using purposive sampling method. This research variable is an indicator of problem-solving ability that consists of understanding the problem, identifying and planning problem-solving, solving problems according to plan, and re-examining the answers generated. The data were collected by using tests and interview methods. The result showed that 73,5% of the students were successful in understanding the problems, 59,5% of the students were successful in identifying and planning problem-solving, 38% of the students were successful in solving problems according to plan, and 26% of the students were successful in re-examining the answers generated. Most students were not able to model mathematical forms correctly and have difficulty in solving problems.
Students’ mathematical reasoning ability viewed from self-efficacy
Authors: Jumiarsih D I , Kusmayadi T A , Fitriana L 
Published: June 2020

Abstract
Mathematical reasoning ability is one of the mathematical competencies that need to be developed in school learning. Mathematical reasoning is indispensable in learning in school, where students are asked to think logically or critically and creatively in solving problems. Students must have confidence in solving these problems. This research is a qualitative descriptive study that aims to analyze the ability of reasoning in solving set problems in terms of self-efficacy. The subjects of this study were 31 students from class 8 of Junior High School 1 Polokarto. The instrument used in this study was a matter of mathematical reasoning ability tests and non-tests in the form of a self-efficacy questionnaire. Based on the results of the study, it was stated that students who have high self-efficacy still have difficulty in solving mathematical reasoning problems, students who have medium self-efficacy still have difficulty in solving mathematical reasoning problems, while students who have low self-efficacy always have difficulty in solving mathematical reasoning problems. Teachers should pay more attention to guiding students so that they do not despair to improve mathematical reasoning abilities so as to reduce student learning difficulties.
The written mathematical communication ability of junior high school students in solving set problems
Authors: Azizah N , Usodo B , Saputro D R S 
Published: June 2020

Abstract
Written mathematical communication helps students in the learning process, helps teachers to assess students’ understanding, and becomes the link between the known and the written information with the understood information. The concept of understanding or procedures will be more meaningful if the students can communicate their ideas well. The study aims to describe and analyze students’ written mathematical communication abilities. This research is a qualitative descriptive study. The researchers employ tests and interviews in collecting data. The validity of the data uses the triangulation method. The results reveal that the students who have high communication ability can reach written communication indicators even though not all indicators are achieved correctly. The students who don’t have high communication ability face difficulty in expressing ideas in the form of mathematical symbols/notations so that they use meaningless notation. Meaningless notations are written based on the known information in the task and the results of students’ thinking when they experience difficulties. These students also have not been able to use algebraic expressio ns and draw conclusions correctly. They directly write the results of the answers without the procedure. They state that concluding is unnecessary. Overall, the students who have high, medium, and low ability can draw Venn diagrams even though the diagram is improper.
Analyzing students’ representation ability: viewed from reflective-impulsive cognitive style
Authors: Septiani D , Riyadi  , Triyanto  
Published: June 2020

Abstract
The main purpose of this research is to describe the ability of student representation viewed from reflective-impulsive cognitive style in resolving geometry problems. This research is a qualitative descriptive. The subject of this study consisted of 6 students of 8th grade Islamic Junior High School 2 Sragen which were taken through a purposive sampling technique. The data were collected through mathematical representation tests followed by interviews. The researchers employed the triangulation method to validate the data. Based on the results of the analysis, it could be concluded that the ability of students’ representation who have a reflective cognitive style was known: (1) Students are able to sketch problems in the form of geometric images to clarify problems and solve problems, (2) Students are able to make Mathematical expressions from other representations and solve problems using mathematical expressions. While the ability of representation of students who have impulsive cognitive style known to students is only able to sketch problems into the form of geometric images to clarify the problem and resolve the problem. This is because reflective students tend to be more in solving problems. Reflective students are able to divide and redraw plane shapes. In addition, reflective students are also looking for the area of the image correctly using mathematical symbols. While impulsive students are in a hurry in resolving the problem so that impulsive students are only able to divide and redraw plane shapes. Impulsive students cannot be looking for the area of the image correctly.
PCK (Pedagogical Content Knowledge) profile of mathematics education students at Universitas PGRI Yogyakarta
Authors: Wicaksono B , Dwipa N M S 
Published: June 2020

Abstract
The aim of this research was to analyze the Pedagogical Content Knowledge (PCK) of mathematics education students at Universitas PGRI Yogyakarta. PCK is a representation of the teacher’s Pedagogic and Professional abilities. The subjects of this study were students of the Mathematics Education undergraduate program Universitas PGRI Yogyakarta semester VI. Research data were obtained through a questionnaire instrument in the form of a Content Representation (CoRe) questionnaire accompanied by documentation. The analysis was carried out by means of a qualitative descriptive method by observing each answer and classifying each answer to determine the PCK level of Mathematics Education students at PGRI Yogyakarta University. The results showed that, in general, mathematics education students at the PGRI Yogyakarta university were still at the Pre PCK level, seen from the analysis of the objectives, concepts and pedagogical aspects. This is an indicator that it is necessary to develop modules that can facilitate students in developing PCK capabilities.
Students’ metacognitive ability in contextual teaching and learningof mathematics based on jumping task
Authors: Khoirudin M , Hobri  , Irfan M , Guswanto E , Purwandi D 
Published: June 2020

Abstract
This research aimed to describe the process and result of the develop Mathematics teaching administration by using Contextual Teaching and Learning (CTL) based on jumping task as well as to know its effect on the student’s metacognitive capability. This type of research was a mixed method, which combines quantitative and qualitative research.The development model used in this study is Thiagarajan 4D.Respondents involved in this study consist of two classes, namely an experimental class of 36 students and a control class of 36 students.The research result shows that (1) the teaching administration; valid, practical and effective criteria (2) there is difference of metacognitive ability in control class and experiment class. This is indicated by the significant effect on of application of learning by using CTL based on jumping task.
The development of mathematical problem based on Higher Order Thinking Skill (HOTS) on comparative material by implementing PBL and its effect on the teacher’s creative thinking skill
Authors: Widiatsih A , Wardani D A R , Royhana U , Djamali F , Septory B J 
Published: June 2020

Abstract
Assessing both learning process and achievement is a pedagogical competency in which it refers to an ability that must be possessed by the teacher. The learning done by teacher is intended to maximize the students’ higher order thinking skills, that is why the assessment is required to measure their higher order thinking skills. This research was carried out to study the teacher’s creative thinking skill and the implementation of problem-based learning to improve teacher’s creative thinking skill in creating mathematical problems based on higher order thinking skill (HOTS) through a comparative research. The method used was mixed method combining quantitative and qualitative research methods. 64 respondents were selected as the subject of this research, then they were divided into two classes, an experimental class which involved 32 teachers and a control class which consisted of 32 teachers. This research revealed that there was a significant difference found on the independent t-test from the post-test. Data analysis showed that t-value taken from post-test was sig. 0,000< 0.05, it proved significant. Therefore, there was an effect of the implementation of problem-based learning in which it was able to improve the teachers’ creative thinking skill in creating mathematical problems based on higher order thinking skill.
The effect of Islamic interactive media by using adobe flash CS6 on students’ learning outcomes of class 7 in one-variable linear equation material
Authors: Farihah U , Fadilah S N 
Published: June 2020

Abstract
The purpose of this research was to know the effect of Islamic interactive media by using adobe flash CS6 on student’s learning outcomes in the topic of one variable linear equation. This study was conducted at class 7 of SMP Negeri 1 Arjasa Jember, east Java Indonesia in the 2018-2019 academic years. This research used a quantitative approach in the form of true-experimental design. The research design was two group pretest and post-test. Cluster random sampling was used as the sampling technique. Data collection technique was in the form of tests. Independent sample t test was used to analyse the data. Based on the t test analysis, it was found that in the pretest, there were no significance differences between the experimental class learning outcomes and the control class learning outcomes (sig 0.904) this indicated that two classes have the same initial ability. While in post-test there was significant differences between the learning outcomes of the experiment class and learning outcomes of the control class (sig 0.1006), with average outcome of experimental class of 86.45 higher than the average outcome of the control class of 79.16. The research finding showed that there was an influence of Islamic interactive media using adobe flash CS6 on student learning outcomes.
The implementation of research based learning and the effect to the student metacognition thinking skills in solving H-irregularity problem
Authors: Hidayatul M , Dafik  , Tirta I M , Wangguway Y , Suni D M O 
Published: June 2020

Abstract
This study aims to develop learning tools based on Learning Based Research and produce learning tools in the form of student worksheets (LKM), learning outcomes tests (THB) and monographs and describe the profile of students’ metacognitive skills. The procedure of this study refers to Thiagarajan’s 4D development model which consists of 4 stages, namely defining, designing, developing, and disseminating. This research is a type of mixed research method which is a multimethod approach. Data collection techniques using test methods, interviews, observation and documentation. Educational research data analysis techniques using quantitative research approaches, data collection techniques are usually carried out with test techniques. While data collection techniques in qualitative research generally use observation techniques, in-depth interviews and documentation. The results showed, after the application of research-based learning, 14% of students were categorized in low-level mathematical metacognition thinking skills, and 34% were categorized as medium-level mathematical metacognition thinking skills and 52% were categorized in high-level mathematical metacognitive thinking skills. The results revealed that the implementation of research-based learning can improve the ability of students’ metacognitive thinking skills in solving H-Irregularity problems.
Development of Remedial mathematics learning based on Lesson Study for Learning Community against problem solving
Authors: Purwandi D , Susanto  , Hobri  
Published: June 2020

Abstract
This study aims to develop remedial mathematics learning tools based on Lesson Study for Learning Community. This research uses a mixed method that combines two previous forms of research, namely research and development and experimental research. The subjects of the research were grade VII students. This type of research is a step of research by combining two forms of research that have been there before, namely the development of research and experimental research. The learning tools developed in this study were on the material for the addition and subtraction of integer in grade VII SMP including Learning Implementation Plan, Student Worksheet, and Learning Outcomes Test. After obtaining a valid, practical, and effective device, the device is then tested in the experimental class to find out whether there is an effect on students problem solving abilities. homogeneity test shows the value of sigh. 0.671 on the pre test and 0.450 in the post test so that it can be concluded that the assumption of homogeneity of variance is fulfilled. Based on the results of the validity, effectiveness, and practicality test, the researcher concluded that the learning platform through bridge games and Lesson Study for Learning Community (LSLC) is a valid, effective, and practical device. At the time of the field trial research was also carried out. From the results of the test differences in problem solving in the two classes using the Mann Whitney Test shows the value of sighing. 0,000 (p<0.05), so it can be concluded that there are differences in problem solving between the control class using conventional instruction and the experimental class using Lesson Study for Learning Community (LSLC) based remedial learning with significant results so that when compared with conventional methods this device gets higher results than in students who use conventional methods.
Scheduling algorithms for an expatriate assignment using vertex coloring of graph
Authors: Adiwijaya N O , Slamin  
Published: June 2020

Abstract
Scheduling system for an expatriate assignment needs an effective and efficient way to be designed since the expatriates reside outside their countries to do their assignments in very limited time. The problem of this scheduling system is quite complicated as the expatriates usually work in a team to do more than one assignment in some divisions. This situation leads to the frequent clash of schedules. In this paper, an algorithm for scheduling system was developed to optimize the expatriate assignment. The methods used for developing the algorithms was vertex coloring of graph. This algorithm resulted in the optimal number of colors which is equivalent to the optimal time allocated for the expatriate assignment without any clash schedule among expatriates. The algorithm can be used for designing a software or application for scheduling system.
Highly scalable readout electronics for large multi-channel dc-SQUID systems
Authors: Bechstein S. , Drung D. , Scheiner M. , Petsche F. , Ali Valiollahi S. , Körber R. , Barthelmess H. J. 
Published: June 2020

Abstract
SQUID instruments for biomagnetic diagnostics, radiometry and astrophysics are often equipped with a large number of devices. For systems with more than a few tens of sensors, read-out with an equivalent number of independent components is not an appropriate solution to meet both, technical and financial requirements. In such cases, specifically tailored readout electronics are typically used. In this presentation, the general concept of a new highly scalable and flexible electronics is presented which is intended for operation of up to several 1000 SQUID channels in the linearizing flux locked loop mode. A prototype version of the electronics for the readout of a low-noise biomagnetic system involving 72 SQUID sensors is demonstrated. Measurement results regarding gain, bandwidth, noise, and power consumption will be presented. Finally, we discuss other potential applications in magnetometry and radiation detection with transition edge sensors or metallic magnetic calorimeters.
Increasing integration scale of superconductor electronics beyond one million Josephson junctions
Authors: Tolpygo Sergey K , Semenov Vasili K 
Published: June 2020

Abstract
We review the existing fabrication processes for superconductor digital electronics and describe approaches to increasing the scale of integration of superconducting digital circuits from the current level of about one million Josephson junctions (JJs) on a 1-cm2 chip toward ten million JJs per chip. We present designs of ac-clocked Single Flux Quantum (SFQ) shift registers, convenient benchmarking circuits, in a 250-nm-linewidth superconductor electronics fabrication process developed recently at MIT Lincoln Laboratory (MIT LL). For shift registers using resistively shunted JJs with Josephson critical current density, J
c of 100 μA/μm2, we achieved a record-high circuit density of 4.2·106 JJs per cm2, a factor of three higher than the previous record obtained in the MIT LL 350-nm-linewidth SFQ5ee process. Using self-shunted JJs with J
c of 600 μA/μm2, we increased this record circuit density to 7.4·106 JJs per cm2.
Static Timing Analysis (STA) with Timing Bleed: Certifying Much Higher Performance for Rapid Single Flux Quantum (RSFQ) Logic
Authors: Wang Fangzhou , Zhang Bo , Pedram Massoud , Gupta Sandeep 
Published: June 2020

Abstract
Josephson-junction based technologies, such as RSFQ, are receiving growing investments due to their high speeds and low power.
As the time interval between the data input and the clock becomes smaller, clock-to-Q delay of a flip-flop increases. In conventional timing analysis, setup time is defined as the interval where clock-to-Q delay increases by 10%. This allows the pipeline to be divided into separate stages and STA to be performed independently for each stage.
However, since RSFQ is pipelined at gate-level, setup time is a significant portion of the clock period and makes this timing constraint extremely conservative. Instead, we define setup time based on the probability of causing a logic error and develop a new STA method that allows larger increases in clock-to-Q delay, i.e., timing bleed, whenever the data input arrives late. We present results of simulations for benchmark circuits with process variations to demonstrate that our new method certifies much higher speeds for RSFQ logic.