bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application of Langrange’s interpolation on analysing flavonoid of tempe
Authors: Asih T S N , Bintari S H , Fitriani M U 
Published: July 2020

Abstract
Interpolation in one of numerical methods to find a value between some data series. Laboratory tests of flavonoid levels in tempe have produced a series of data. These data are pairs of data between isoflavone levels and fat levels, isoflavone levels and protein levels, and also isoflavone levels and carbohydrate levels. However, to analyse the relationship between these data is difficult to do with regression. Lagrange’s interpolation is an alternative method to see the relationship between a series of flavonoid data. From the three data can be generated quadratic equations that describe the relationship of the data. From these equations, we can estimate the level of isoflavone if the fat levels is known, as well as the protein levels and the carbohydrate levels.
Improvement students’ achievement in elementary linear algebra through APOS theory approach
Authors: Arnawa I M , Yerizon  , Nita S 
Published: July 2020

Abstract
This study aimed to improve students’ achievement in elementary linear algebra through APOS theory approach. This study is pre-experimental one-shot case study design. The sample were 32 students who participating in the lecture of chemistry mathematics II academic year 2018/2019 at Andalas University. Instrument used in this study was problem solving test in elementary linear algebra which consisted of four item test that measures the ability to solve daily life problem with system of linear equation, determine determinant of the matrix, determine invers of matrix, and determine eigen value and eigen vector of matrix. Descriptive statistics and t-test with α = 0.05 level of significance were used for data analysis. The results show that: (1) APOS theory approach can improve students’ achievement in elementary linear algebra significantly and (2) there was no a significant gender gap in students’ achievement in elementary linear algebra.
Flying multi agent control for detect an object
Authors: Tjahjana RH 
Published: July 2020

Abstract
This paper exposes two flying vehicles control. The objective of this paper is proposing control design use optimal control approach for flying multi-agent to detect an object. In optimal control approach, beside the dynamical system model, the cost functional is needed. In this paper, the dynamical system model is dynamical system of flying vehicle and the cost functional is the functional which make the vehicles move together to detect the lost object. The scope of this exposition is how to control two flying vehicles move around an object. The two flying vehicles must satisfy the simulation scenarios as follows. Both of the flying vehicles forced do not move far each other and also do not collide each other. Besides mathematical analysis of the model, like controllability and observability of the model, the result of this paper, present the theorem and the proof the cost functional which guarantees that the booth of the vehicles can fly satisfy the scenario. The result also exposes the simulation of controlling two vehicles. The conclusion of this paper states that the optimal control method can be used to solve the problem of control two flying vehicles to detect the lost object.
The dynamics of the basic model for the zika epidemic
Authors: Kharis M , Cahyono A N 
Published: July 2020

Abstract
Zika disease began to get the world spotlight when in 2016 around 1-1.5 million people were infected with the Zika virus in Brazil and 4000 babies were born Microcephaly. Indonesia is a region that is potentially attacked by Zika virus outbreaks. This study discusses the mathematical model for the spread of Zika disease in humans is associated with the population of spreading vectors which in this case are mosquitoes. The model used is a deterministic model in the form of a compartment model in sub-population classes. The purpose of this research is to build a mathematical model, analyze the stability point, and arrange a simulation of a mathematical model.
Challenging students to improve their mathematical creativity in solving multiple solution task on challenge based learning class
Authors: Ardiansyah A S , Asikin M 
Published: July 2020

Abstract
As one of the competencies that must be possessed in the era of Industry 4.0, creativity also plays an important role for development of mathematics education in the 21st era. This study aims to determine the improvement of students’ mathematical creativity in solving Multiple Solution Task (MST) on Challenge Based Learning (CBL) class. The quantitative quasi experimental pretest posttest conducted at SMP Negeri 1 Semarang used a mathematical creativity test adopted MST as a data collection technique and data were analyzed using the t-test hypothesis and gain. The results revealed the improvement of students’ mathematical creativity in solving MST after the implementation of CBL and differences in the improvement of students’ mathematical creativity where the student’s gain of mathematical creativity on CBL (experimental) class was more than the student’s gain of the mathematics of the Problem Based Learning (PBL) (control) class. Other findings indicate a difference in achievement of mathematical creativity indicators between the CBL class and PBL class which shows that CBL provides a positive influence to improve each indicator of mathematical creativity.
Google classroom as a mathematics learning space: potentials and challenges
Authors: Abidin Z , Saputro T M E 
Published: July 2020

Abstract
Information and communication technologies have become a very powerful means of student engagement in an online learning environment. Google Classroom is an easy-to-use educational application that enables teachers to extend their student learning online. With Google Classroom, teachers can create classes, post assignment, grade and send feedback, and see students’ works in real-time. This study aims to investigate the students’ perspectives on their engagement in online learning in Google Classroom. An ethnographic case study was employed to explore and observe student activities in a virtual class in Google Classroom. Questionnaire survey and semi-structured interviews were conducted to understand students’ perceptions of online learning through Google Classroom. The results showed that Google Classroom has good potential to support students’ learning. Students could access the learning resources provided by the teacher at anytime and anywhere. They were also able to construct their knowledge by actively participating in an online discussion forum, and the instructional practices can be performed efficiently. Some challenges that arise included the limited availability of devices, technical issues, and the low level of familiarity of Google Classroom’s features, the readiness of students to study independently online. Although challenges arise, the teacher enabled to deal with the issues well.
The effectiveness of innovative learning model on the mathematical representation ability of students in junior high school
Authors: Wijayanti K , Budhiati R , Dewi (Nino Adhi) N R , Ali A M 
Published: July 2020

Abstract
This study aims to analyze the effectiveness of the Learning Cycle 5E model in developing the mathematical representation ability of Junior High School Students. This study was quantitative. The population was students in Junior High School of grade VIII in Semarang. The sample was taken by a random sampling technique. The data were collected by a test. The data were analyzed by the z-test and t-test. The result showed that (1) students’ mathematical representation ability on the Learning Cycle 5E class achieve classical completeness; (2) the average of mathematical representation ability on the Learning Cycle 5E class was higher than on the PBL class; and (3) the proportion of students’ mathematical representation ability on the Learning Cycle 5E class was higher than on the PBL class. In other words, the Learning Cycle 5E model was effective in developing the mathematical representation ability of Junior High School Students.
Teacher’s belief of mathematical literacy based on local culture: Case study of junior high school mathematics teacher
Authors: Danoebroto S W , Suyata  , Jailani  
Published: July 2020

Abstract
This study was conducted to explain the teacher’s belief of school mathematics subjects in relation to their concepts of mathematical literacy based on local culture. The participants were three mathematics teachers at Junior High School in Java, Indonesia. They were chosen because they met the criteria, namely having at least five years teaching experience, having the awareness to conduct ethnomathematics studies, and teaching mathematics at school using local cultures minimum in one academic year. Research data were collected through interviews, observations during the teaching and learning process, and lesson plans. The data were then analysed using the interactive models of Miles and Huberman. The results of the study showed that mathematics was believed as a tool for solving problems in everyday life, which was related to human and cultural dimensions. The conception of teaching mathematical literacy based on local culture, as according to teacher perceptions, had not placed local culture as an evaluation tool for the development of mathematical literacy. This was because mathematical literacy was not yet believed to be a social construction developed based on mathematical ideas and practices in local culture.
Mathematics creative thinking ability based on student’s cognitive style by using Knisley learning models
Authors: Mulyono  , Rosayanti S M , Kristiawan R 
Published: July 2020

Abstract
The aim of this study was to find out the ievements of students’ creative thinking ability with Knisley’s learning model compared to the Direct Instruction model. This research is mixed methods. The results showed: (1) the mathematical creative thinking ability of students with Knisley’s learning model achieving classical completeness; (2) the proportion of students’ mathematical creative thinking abilities with Knisley’s learning model is better than the Direct Instruction model; (3) the mathematical creative thinking ability of students with Knisley’s mathematics learning model is better than the Direct Instruction mathematics learning model (4) student groups impulsive cognitive style achieve indicators: fluency; or fluency and novelty; student groups reflective cognitive style achieve indicators: fluency and flexibility; or fluency, flexibility and novelty; student groups fast-accurate achieve indicators: fluency, flexibility, and novelty; or fluency, and flexibility; and student groups slow–inaccurate achieve indicators: fluency, or nothing.
Increased mathematical literacy and HOTs through realistic learning assisted by e-schoology
Authors: Wardono  , Mariani S 
Published: July 2020

Abstract
This study aims to determine the development of realistic learning tools (RME) assisted by e-schoology that are valid, practical and know the effectiveness of such learning to improve mathematical literacy and improve higher order thinking skills (HOTs). The population of this research is students of SMPN 9 Semarang. The sample is taken randomly and gets 1 class. The class is given a preliminary test of mathematical literacy and HOTs, then realistic learning is assisted by e-schoology and afterwards a final test is given. The results showed that realistic e-schoology learning developed is valid, practical and there were differences in mathematics literacy skills and HOTs after learning compared to before. Because the mean literacy abilities of mathematics and HOTs after learning are higher than before learning, it can be concluded that realistic learning assisted by e-schoology can increase mathematical literacy and HOTs.
Plasmodium classification on red blood cells image using multiclass support vector machines
Authors: Pradini S F Y O , Bustamam A , Rustam Z 
Published: July 2020

Abstract
Classification methods have been frequently used in various aspects, including bioinformatics. One of it’s purpose of this classification is to determine phase level of a disease. This research will classify the phase of plasmodium falciparum parasite which causes malaria. The disease is spread by an infected female Anopheles mosquito, which contains Plasmodium. The result of this research could be used to determine Plasmodium parasite phase in infected people’s red blood cells. The purpose of this research is to discover the success rate of Multiclass Support Vector Machines method and analyze it in order to predict the parasite phase levels. The data of this study is image data of red blood cells which were infected by three kinds of Plasmodium falciparum parasite levels. In the process, this study will be using Canopy as Integration Development Environments of phyton programming language. From 112 trials, the highest number of accuracy is 87.5% for Multiclass Support Vector Machines one vs rest method which used the 4-fold cross-validation with C=1 as parameter for linear kernel.
Disaster recovery planning with distributed replicated block device in synchronized API systems
Authors: Budiman K , Arini F Y , Sugiharti E 
Published: July 2020

Abstract
System backup can’t be a good solution without planning. Secure data backup planning will prevent more data loss. The Comprehensive Exam is a system to conduct a comprehensive exam and test score management, which is also carried out with the Computer-Based Test. The two systems are connected, these are running with a data-based application programming interface (API) synchronization on two different servers. Two servers running simultaneously with the synchronized API. Special methods of solving this problem are needed to back up supported information systems and computer-based tests. Disaster Recovery is a term for recovery and resumption. A disaster recovery plan is a plan to improve information technology (IT) infrastructure from other disasters that endanger the information infrastructure. One method of recovering business processes is to restore the data backup itself. Data backup is one of the important elements, the data backup method will be applied is the disk mirroring method, which is making a permanent backup from the main data center, data backup will be provided a real-time backup using the Distributed Replicated Block Device (DRBD) concept. In our research concluded automatically synchronizes implementation backup data using the DRBD concept.
Twitter text mining for sentiment analysis on government’s response to forest fires with vader lexicon polarity detection and k-nearest neighbor algorithm
Authors: Mustaqim T , Umam K , Muslim M A 
Published: July 2020

Abstract
Opinions about the government’s response to forest fires have drawn many opinions from the community. One way for people to express their opinions is to use social media Twitter. This study conducted a sentiment analysis process on the government’s response to handling forest fires in Indonesia in 2019 with data sources from Twitter. The analysis was carried out on 6325 datasets written on Twitter on September 20, 2019, and then through the process of pre-processing, automating labeling and classification. The automate labeling process uses a Vader that automatically detects the negative or positive polarity of each data and then goes through the classification process using the KNN algorithm. The test results that were built using rapidminer tools showed an accuracy level of the KNN algorithm of 79.45%, the highest if compared to other classifier algorithms such as decision trees, naïve Bayes and random forests. The sentiment analysis process can almost run automatically without human touch because there is already automated labeling using Vader. Testing sentiment analysis related to the government’s response to forest fires can be analyzed using the KNN algorithm and lexicon polarity detection Vader can be done properly.
Toxicity of essential oils against termite Macrotermes gilvus Hagen (Blattodea: Termitidae)
Authors: Subekti N , Saniaturrohmah  
Published: July 2020

Abstract
Termites are widely known by the public as a pest building. The level of attacks is increasing from year to year. Nowadays, termite control using synthetic pesticides, their use is becoming increasingly uncontrollable that it is very dangerous to human safety. Therefore, the innovative research needed to produce a natural pesticide that is safe for the environment. Research on the use of natural materials as a natural biopesticide control technology innovation that is needed today. Natural materials such as Syzgium aromaticum, Myristica fragran, Cinnamomum osmophleum, Areca catechu has a compound that can be used as a termite control Macrotermes gilvus Hagen. The statistical test data used was a two-way ANOVA test to Determine the effect of essential oils on termite mortality, while to Determine the essential oil that had a significant effect on termite mortality, the Tukey HSD test was used. The purpose of this study was to analyze the active compounds of Syzgium aromaticum, Myristica fragran, Cinnamomum osmophleum, Areca catechu to control subterranean termites gilvus M. Hagen. The conclusions of this study are compounds Syzgium aromaticum, Myristica fragran, Cinnamomum osmophleum, and Areca catechu with a concentration of 10% has the potential to control subterranean termites M. gilvus Hagen.
View of teachers and students understanding’ of the nature of science at elementary schools in Padang city Indonesia
Authors: Satria E , Widodo A 
Published: July 2020

AbstractThis research aims to determine the level of understanding of teachers and elementary students about the nature of science (NOS) in the city of Padang. The type of research conducted is descriptive qualitative by survey method. The sample of this research are 1 teacher and 28 students of grade 5 SD N 08 Padang Besi at Lubuk Kilangan District Padang City, 1 teacher and 28 students of grade V Elementary School Kampung Baru at Lubuk Begalung District Padang City, 3 teachers and 29 students of grade V and VI Elementary School Koto Tuo at Koto Tangah District Padang City, and 3 teachers from Elementary School Lubuk Minturun at Koto Tangah District Padang City. The instrument used in the research is a questionnaire containing 30 statements prepared by researchers, consulting with supervisor, elementary teachers and compiled based on theories from related literature. The result of the research showed that the level of understanding of teacher science in three sub-districts are in Good criteria with average score of 71.58% and the level of science understanding of elementary students in three sub-districts of Padang City is on the criteria Enough with an average value of 64.05%. The Scientific Method aspect of the nature of science is more widely understood by teachers and the Theories and Law aspects of the nature of science are more widely understood by students. In conclusion, the level of understanding of the nature of science of the teachers is higher than the level of understanding of the nature of science of the students and no relationship significant between the two. The implication of this research is the knowledge about the nature of science should begin to be considered and understood by all elements of education so that teachers and students can understand the nature of science very well.
Lead-polyester resin composite as an alternative material for radiation protection in radiography
Authors: Yulianti I , Susilo  , Masturi  , Susanti T , Setiawan R 
Published: July 2020

Abstract
This work presents synthesization and characterization of polyester resin doped with lead acetate (Pb (CH3COO)2) as an alternative material for radiation protection in radiography. Five samples were synthesized with various lead concentration which are 0%, 3.5%, 3.75%, 4% and 4.5%. The samples were characterized using X-ray, He-Ne laser, and FTIR. The results showed that as lead concentration was increased, optical density increased while X-ray transmission decreased. It were found that the attenuation coefficients for each samples were 0.132 cm−1, 0.435 cm−1, 0.543 cm−1, 0.691 cm−1, and 1.156 cm−1. In terms of transmission and attenuation coefficient, lead-polyester composite with lead concentration of 3.5% has an optimum performance.
Moodle as e-learning media in physics class
Authors: Putri R Z , Jumadi  , Ariswan  
Published: July 2020

Abstract
The 21stcentury is characterized by technological developments. This has an impact on all aspects of life including education. At this time, technology is one component in education that cannot be ignored. The purpose of this study was to map the student response to e-learning moodle after using it in class physics. Experimental research model with a one-shot case study designed use in this study. Data collection through a questionnaire at the end of learning. The results show that students have a good response to e-learning, with an average mark of perceived usefulness to e-learning is good, e-learning self-efficacy is good, perceived ease to use to e-learning is good, attitude to e-learning is good, and e-learning system usage is good. To better understand moodle as e-learning in physics study, advantages and obstacles are explained in the discussion.
The profile of student’s problem solving skill using analytical problem solving test (apst) on the topic of thermodynamic
Authors: Putra A A I A , Aminah N S , Marjuki A , Pamungkas Z S 
Published: July 2020

Abstract
This study aims to analyze students problem solving skill in solving analytical problem solving test on the topic of thermodynamics. The research approach used is quantitative with descriptive method. The research subjects were 100 students of senior high school in Ngawi. Instrument test research used analytical problem solving test was modified of national examination test. Instrument test in the form of essay test which measure of 4 indicator problem solving skill by G Polya : (1) Understanding the Problem, (2) Devising plan, (3) Carrying out the plan, (4) Looking Back. The results show that percentage achievement of understanding the problem (58.40%), Devising plan (70.92%), Carrying out the plan (65.52%), looking back (42.88%). It shows that the student problem solving skill of senior high school in Ngawi is still moderate category so it’s necessary to do improvement effort.
The development of interactive learning media with lectora inspire in gas kinetic theory subject to improve the result and students’ interest of the eleventh grade students of senior high school
Authors: Liliana R A , Raharjo W , Jauhari I 
Published: July 2020

Abstract
Education has an important role in the life a nation or a country. It is expected to become the main pillar of the nation in improving the quality of human resources in mastering the various branches of skills and expertise in accordance with the development of science and technology, especially in the field of physics. The use of interactive media that integrated with digital media including electronic combination of text, graphics, video, and sound. The aim of this study is to know the feasibility and the effectiveness of the application of interactive media with Inspire Lectora to increased result and students’ interest of class XI Senior High School. The method used is Research and Development with the development model of DDD-E (Decide, Design, Develop, and Evaluate). The design of this research uses ex-post facto. This developed interactive media is presented and applied by a software named Inspire Lectora, the interactive media development product presented online aided by web. The research subjects are all of the ninth grade science students of Samarinda 6th State Senior High School which is located in Samarinda, East Borneo. Developed interactive media is eligible to be applied in this Senior High School. Developed interactive media is considered to be effective to measure the result improvement and students interest in the subject of the gas kinetic theory.