bluuebunny/crossref_metadata_2025 huggingface dataset:
Model selection in regression linear: a simulation based on akaike’s information criterion
Authors: Darnius O , Normalina  , Manurung A
Published: November 2019

Akaike’s Information Criterion (AIC) was firstly annunced by Akaike in 1971. In linear regression modelling, AIC is proposed as a model selection criterion since it estimates the quality of each model relative to other models. In this paper we domonstrate the use of AIC criterion to estimate p, the number of selected varibles in regression linear model through a simulation study. We simulate two particular cases, namely orthogonal and non - orthogonal cases. The orthogonal case is run where there is totally no correlation between any independent variable and one dependent variable, whereas for the the orthogonal case is run where there is a correlation between some independent variables and one dependent variable. The simulation results are used to investigate of the overestimate number of independent variables selected in the model for two cases. Although the two cases produce the oversetimate number ofindependent variables, most of the time the orthogonal case still provide less overestimate of independent variables than the non orthogonal case.
Some properties of new hesitant fuzzy operators
Authors: Nazra A , Asdi Y , Yuspa W A , Wahyuni S
Published: November 2019

Hesitant fuzzy sets are tools that appear and are useful for dealing with vagueness and uncertainty. Interestingly, we can determine two new operators inspired by operators which have been defined. Some properties associated with binary operations of hesitant fuzzy elements that were introduced by previous researchers are constructed. We obtain several relations between the new operators and such binary operations. Here we also give a correction of a result in previous related article.
The differences in geometry cognitive learning results using ICTAdobeFlash CS6 program
Authors: Zainil M , Helsa Y , Ahmad S , Ningsih Y , Ningsih H , Yanti W T
Published: November 2019

This research is motivated by the lack of students’ interest in learning mathematics that isconsideredto be difficult and tedious. Then, this problem results the low cognitive learning outcomes of the students. The matter happens because the teacher is still considered to be the centre in learning process, the lack of variations in instructional media, and the way the teachers teach in the class. This study aims to determine whether there are differences in the students’ cognitive learning outcomes from the use of ICT instructional media using adobe flash CS6 programs at SDN 01 and 09 Bandar Buat. This type of research is a quasi-experimental in the form of non-equivalent control group design. The sampling technique is purposive sampling, in which the first class is chosen as the control class and the second class is the experimental class. The instrument used in this study is an objective test with multiple choice types. The data analysis technique used is inferential statistical test with t-test. The results show that the values of the experimental class using the ICT media of the Adobe Flash CS6 program based on STAD is 82.66 with a standard deviation 13.67, while the class that does not use ICT media of the Adobe Flash CS6 program based on STAD is 74.84 with a standard deviation of 13.88. It can be concluded that the hypothesis testing using the t-test at the significance level a = 0.05 obtained tcount
= 2.36 and ttable
= 1.99. Thus, the condition in which tcount >ttable
shows that the hypothesis H.
The application think pair share in learning mathematic
Authors: Ningsih Y , Andika R , Sari I K , Ahmad S , Kenedi A K
Published: November 2019

This research was aimed at showing the effect of using cooperative learning type Think Pair Share toward learning outcome of math. This research included two classes in class . The classes were chosen by using Random Sampling. The Design was Treatment by Block Design. The result of the study showed that: (1) The result of the study of the students who were taught by cooperative learning type Think Pair Share modelwas higher than the result those tought by conventional model. (2) The result study of male students who were taught by using cooperative learning model type Think Pair Share is higher than the those tought by conventional model. (3) The result study of female students who were taught by using cooperative type was higher than those tought by conventional model. (4) There was no interaction between the learning model with gender toward students result study.
Utilization of manipulative teaching aids to grow the numerical ability of students with disabilities
Authors: Sugiman  , Suyitno H , Rochmad  , Junaedi I
Published: November 2019

Children with disabilities (CwD) have limitations in conceptual understanding of mathematics. Lack of numerical conceptual understanding will cause CwD to experience difficulty in counting. The purpose of this case study was to analyze the growth of numerical abilities of students with disabilities through the application of manipulative teaching aids. This research method used a qualitative approach. The subjects of this study were students of the seventh grade of the State Extraordinary School of Salatiga (SLBN) who had limited vision, mind, hearing, or speech impairment. After the results of the students’ work were corrected, the qualitative data analysis was done by analyzing the results of the test, interview, and triangulation data. The results of this research: Through the use of Manipulative Teaching Aids, the numerical abilities of CwD could be improved and developed. It is recommended that teachers in ES should use Manipulative Teaching Aids so that the numerical abilities of CwD can be improved and developed.
Individuals development of the metacognitive thinking skills on solving math word problems
Authors: Rokhman N , Waluya S B , Rochmad
Published: November 2019

Metacognition as knowledge and cognition on cognitive phenomenon and one’s own knowledge on his self-cognitive processes and use of this knowledge in order to monitor cognitive processes. Metacognitive skills refer to a person’s procedural knowledge for regulating one’s learning activities including problem solving. Word problems in mathematics have been vastly included in educational literature mainly due to the fact that the issue is considered to be one of the most difficult in math lessons. This research aimed at investigating the contribution of students’ ability to metacognitive thinking to metacognitive thinking skills in the aspects of prediction, planning, monitoring, and evaluation through the provision of mathematical words problems. The data was collected through tests, Metacognitive Awareness Inventory (MAI-Jr-Modified) observation sheets and interviews. The results of the study showed that the score of students metacognitive ability was 75.80 which contributed to the level of students metacognitive thinking skills at 78.98% in the high category based on the four aspects of metacognitive skills namely 78.13%; 81.25%; 84.38% and 71.88%. Learning through the provision of mathematical problems in the form of words problems can develop students metacognitive skills.
The stimulus for facilitating junior high school student’s thinking in mathematics
Authors: Kurniasih A W , Hidayah I , Asikin M
Published: November 2019

These research aims were described teacher’s stimulus in mathematics learning for developing thinking the skill of Junior High School students grade VIII, and perceived teacher’s perception about a scientific approach and thinking of Junior High School students grade VIII. This descriptive-qualitative research involved professional working group for mathematics that is the Association of Mathematics Teacher (Musyawarah Guru Mata Pelajaran, MGMP) in Semarang. The first step of the research was forum group discussion with 19 mathematics teachers grades VIII in Association of Mathematics Teacher Semarang. The second step was research in SMPN 23 Semarang and SMPN 36 Semarang. Data collection techniques include a questionnaire about teacher’s stimulus for facilitating student’s thinking; a questionnaire about students response based on teacher’s stimulus; a survey about teacher’s perception in a scientific approach, thinking, and 2013 Curriculum in the field; and observation sheet about teacher’s stimulus for facilitating student’s thinking. Method and sources triangulation used in this research. The result were teachers already have a good understanding about a scientific approach, and this research recommends problem posing, numerical investigation, and open-ended task as teacher stimulus in developing students’ thinking ability in mathematics learning in Junior High School.
Identification of factor affecting atrial fibrillation in a patient with risk of obstructive sleep apnea at Rumah Sakit dr.Cipto Mangunkusumo using decision tree method
Authors: Vitasari D N , Siswantining T , Kamelia T
Published: November 2019

Obstructive Sleep Apnea (OSA) have a higher prevalence in Asia population. OSA have associated with Atrial Fibrillation (AF) from hypoxemia condition even though the association between OSA and AF could be contributed to risk factor AF among OSA patient. AF has four times the higher prevalence in a patient with OSA than without OSA (4.8% vs. 0.9%). Although, the study about factor affecting AF in OSA patient has not been widely practiced, especially in Indonesia. This study aims to determine the factors affecting AF in patients with risk of OSA. The data used in this study is primary data of patients with risk of OSA at RSCM based on interviews with the Berlin questionnaire. The sample size are145 patients with risk of OSA based on the Berlin questionnaire using a technique of non-probability sampling. The number of patients diagnosed AF is 45 patients (31.03%). The decision tree used is CHAID and CART to determine which factors significantly affect AF and classify based on the factor. Dependent variables in this study are AF, while independent variables are age, sex, body mass index (BMI), waist circumference (WC), neck circumference (NC), blood pressure (BP), smoking history, history of consuming alcoholic, history of heart failure, history of coronary heart disease (CHD), and history of stroke. The results of this study, which factor significantly affect AF in a patient with risk of OSA using CHAID are age, BP, WC, and NC with the accuracy rate is 71.7%, although using CART are age, BP, WC, BMI, CHD, and smoking with the accuracy rate is 77.2%.
Hearing-impaired student ability to solve the problem in math
Authors: Leton S I , Wahyudin  , Dosinaeng W B D
Published: November 2019

The research objective is to explore the mathematical connection capabilities of hearing-impaired students in grade 8 in completing tests related to connection with other disciplines. The type of research used is qualitative research with a case study design. The number of subjects in the study was six people who were taken purposively based on the characteristics of language and speech, intelligence, and social-emotional spread in 3 schools namely; SLB B KaryaMurni of Ruteng - East Nusa Tenggara (NTT), State SMPLB Semarang and SLB B Don BoscoWonosobo. The results of the analysis of work and interviews found that mathematical connection abilities that arise in hearing impaired students in completing tests related to connection with other disciplines include; (1) in building an understanding of the problem, hearing impaired students tend to represent problems by making pictures. (2) in making a preliminary plan to complete, the students are inclined to use the media related to the problem given. (3) if hearing impaired students can find patterns by seeing regularity, then in determining these patterns they tend to use the results of exploration by making pictures. Thus concluded that hearing impaired students can solve non-routine questions with a high level of difficulty by using the patterns found by first exploring through images.
Analysis critical thinking skills in solving problems algebra in terms of cognitive style and gender
Authors: Cahyono B , Kartono  , Waluyo B , Mulyono
Published: November 2019

Critical thinking is believed to have significant contributions to learners’ academic context in the era progression of technology and information. Critical thinking skills are needed to solve problems, especially in solving algebraic problems. This critical thinking process is influenced by several factors including cognitive style and gender. The purpose of this study was to understand the process of critical thinking from the perspective of cognitive style and gender on solving algebraic problems students in the mathematics department at Walisongo State Islamic University. The kind of research qualitative descriptive, a test MFFT used to analyze cognitive style students into groups impulsive or reflective cognitive style. Tests to analyze skills critical thinking based on Ennis consisting of Focus, Reason, Inference, Situation, Clarity, and Overview. The research indicated that style cognitive and gender significantly affected the way and the ability to think critically students. This study provides information that on the subjects of reflective cognitive style, male are better than female in terms of critical thinking skills and there are differences in the process. Male subjects on reflective cognitive style are better than female subjects, but for the cognitive style exclusive female subjects are better than men.
Mathematical literacy ability with RME (realistic mathematics education) approach in fifth grade students
Authors: Purwanti K L , Sukestiyarno  , Waluya B , Rochmat
Published: November 2019

The framework of the 2012 Mathematical PISA, mathematical literacy is defined as an individual’s ability to formulate, use and interpret mathematics in various contexts. The level of Madrasah Ibtidaiyah needs an understanding of mathematical literacy. The purpose of this research is to know the ability of mathematical literacy of fifth grade students in Madrasah Ibtidaiyah Darul Ulum Ngaliyan Semarang 2017. The research method used is mixed methods. The study was conducted in grade 5 students. The quantitative analysis is tested by the average difference test with dk 56 and 5% of real level then obtained ttable = 1,674. The result of t-test tcount = 1.087. So compared between tcount and ttable then tcount < ttable so that H0 is accepted, it means there is no difference on the average of students ‘mathematical literacy skills taught by using the RME approach with the average ability of students’ mathematical literacy using the expository method. The result of the mathematics literacy test of fifth grade studentsin Salman MI Darul Ulum is still in low category Qualitatively, after interviewing 6 students, it can be seen that the ability of students’ mathematical literacy is still lacking and there is no habituation of mathematics literacy in learning.
An analysis climate change of the curriculum in Indonesia
Authors: Sofiyan S , Aksa F I , Saiman S
Published: November 2019

This study aims to analyze climate change content integrates into the new geography curriculum in Indonesia. This research uses content analysis method of curriculum document consisting of basic competence and syllabus. Results represent that overall basic competence provides a huge opportunity for students to learn climate change. But the condition is not supported by the syllabus. The topics of climate change in the syllabus are a bit and also dominated by aspects of cognition of climate change. Those are serious problems to integrate the climate change in curriculum. The Teachers will get into difficulty to teaching maximum because the teacher’s understanding of the concept of climate change in Indonesia is very limit. Therefore, it needs to be supported by a syllabus that explicitly presents topics and learning activities. The findings of this research are essential to provide input to the government in future curriculum reviews.
Problem-solving in creative thinking process mathematics student’s based on their cognitive style
Authors: Setyana I , Kusmayadi T A , Pramudya I
Published: November 2019

Problem solving plays an important role in mathematics that is to understand students’ difficulties in math skills. This study aims to reveal students’ mathematical problem solving profiles based on their cognitive style in their creative thinking process. As a result of this study, students who have Field Independent cognitive style are able to solve the mathematical problems given so as to belong to the process of creative thinking level 4. Students who have Field Dependent cognitive style are generally confined to math problems that can be solved to include creative thinking process level 0 (not creative). In this study, it is seen how the solution of mathematical problem-solving based on their cognitive style influences the creative thinking process.
Ethnomathematics activities of coffee farmers in Sidomulyo jember area as project student sheet
Authors: Sunardi  , Setiawan T B , Yudianto E , Sugiarti T , Ambarwati R , Agustin M A
Published: November 2019

Ethnomathematics is a study of mathematics ideas form society. This research is undertaken in Sidomulyo Jember. This research goal is describe ethnomathematics model on ethnomahematics activities of coffe farmers. This research is qualitative type research with an ethnographic approach. The method of collecting data used are observation and interview. Research subject are four farmers in Sidomulyo Jember. The result of data collection were analyzed descriptively. As the result of this research visible farmer’s activity such as design activity, measure activity, and calculate activity. The activity starts from the beginning of planting to the harvest.
Mathematics mobile learning with TPACK framework
Authors: Hernawati K , Jailani
Published: November 2019

The mission of twenty-first-century education is to construct a knowledge-based society through the integration of Information and Communication Technology in the learning process. Mathematics teachers are required to be able to integrate technology in learning. Appropriate model and instructional media can encourage students’ critical thinking skills. Currently, the learning process not solely takes location in the classroom, however also makes use of digital media, online, teleconferencing, and cellular technology outside the classroom. Various learning applications in mobile devices can be utilized in mathematics learning. Mobile Learning is a learning model that is performed between places by means of the use of technology that is easy to raise when the learner is in a mobile situation. By using mobile learning, the availability of teaching materials can be accessed at any time and interesting material visualization. Mathematics Mobile learning is the use of mobile devices in mathematics learning. TPACK is a framework that describes the relationship and complexity between the three basic components of knowledge (technology, pedagogy, and content). The TPACK framework is a model used for technology integration in education. The suitability of material characteristics with appropriate instructional media, learning model, and technology selection in Mathematics Mobile Learning can improve learning achievement and motivation of learners.
Instrument higher order thinking skill design in course high-class mathematics in elementary school teacher of education departement
Authors: Ahmad S , Kenedi A K , Masniladevi  , Ariani Y , Sari I K
Published: November 2019

The background of this research is the absence of standard instruments that can measure the ability of high-level thinking in students on learning mathematics. The objective of this research is to produce valid, practical, and effective devices that can measure the strength of high-level thinking of the students majoring in elementary school teacher of education. This research is development research. The development steps of this research are theoretical analysis, formulating the operational definition, the determination of the contract, the dimensions and indicators, the preparation of the grid, the development of the items, the analysis of legibility and social desirability, field trials and data analysis. This research uses validation sheet, questionnaire and item. Based on HOTS instrument validity test 85.50% with the very valid category. Practicality test result from lecturer percentage is 87% with convenient category and student percentage 84.50% with the practical category. The effect of the HOTS student instrument assessment from the first trial to the second trial increased by 23% indicates a positive change in the students’ HOTS ability. Therefore, the HOTS instrument is declared effective. HOT instruments for elementary school teacher of education students are consequently valid, practical and effective. This research implicates research can be used as a standard instrument of thinking ability of high-level students of elementary school teacher education.
Adaptation and creativity in mathematics learning
Authors: Supandi S , Suyitno H , Sukestiyarno Y L , Dwijanto D
Published: November 2019

Learning is often seen as developing academic abilities and achievement through formative assessment. Students always hate their ‘failure’ and are not as happy as students with better theoretical results. Equally important is the fact that undue emphasis on results rather than the process is likely to scare students from originality. Taking risks without fear of failure is the foundation of creative effort. This study used qualitative research methods, and the research subjects are students of mathematics education in a class of Differential Equations. This article shows two processes in evaluating learning, with the aim of seeing how students see a mathematical problem based on the question of the problem. One student class is given an issue clearly and leads to one answer, and at another time the question is presented again with questions by emphasising the role of creativity in learning and skills development. Of the two results of the work will be seen in how students face a mathematical problem. How to think convergent and divergent affect learning outcomes, and what factors need to be developed to make students feel more creatively.
Developing an appropriate textbook for mathematics curriculum analysis course
Authors: Istihapsari V , Istiandaru A , Rohmah S N
Published: November 2019

Pre-service mathematics teachers need to understand the school mathematics curriculum in order to ensure their capability as future teachers. As a learning planner, they have to possess an adequate understanding of what and how the school mathematics materials should be organized to fit the students’ need. The current Indonesian curriculum challenges the teachers to design mathematics learning which integrates four domains of competence, namely the spiritual attitude, the social attitude, the knowledge, and the skill. However, there has been no textbook available to guide the pre-service mathematics teacher designing the desired mathematics learning better. This research aims to develop a textbook for mathematics curriculum analysis, especially for senior high school level. It was an R&D using Plomp model stages, including initial investigation, design, construction, and test, evaluation, and revision. In the final stage, we have successfully developed a valid project-based learning textbook for mathematics curriculum analysis.
Mental construction in mathematical proof
Authors: Mahendra I W E , Erawati N K , Sunita N W
Published: November 2019

Mental construction in this study is mental construction based on APOS theory (action, process, object, schema) in conducting mathematical proof. Therefore the purpose of this research is to find out how mental construction is based on APOS theory in mathematical proof and the results obtained from its application. This study included a quasi-experimental with posstest only nonequivalent comparison group design. This study conducted at IKIP PGRI Bali. The research sample was students who took real analysis courses. Based on the sampling results obtained two classes. Data retrieval is done by direct observation and tests. Based on the observations, it shows that the student worksheet is able to make all students active in learning. Data analysis shows that the mental construction of students proving ability is only up to the object stage. Based on the whole test results, the experimental class achieved significantly better results compared to the comparison class. This shows that the mental construction of students in proof has not yet reached the schema stage, which means that it needs to be improved and the application of APOS learning is able to help students in mathematical proof.
Mathematical connection: how is student’s ability to complete a two-variable linear equation system?
Authors: Riyadi S , Qamar K , Wulandari T C , Oktaviana I
Published: November 2019

The aim of this study is to describe how students make mathematical connections in two-variable linear equation system. This study using three indicators to determine the ability of student’s mathematical connections, there is ability connection between concepts in mathematics, procedures are used by students to solving problems, and ability students to solving contextual problems. Test and interview were used to collect data on ninth-grade students at SMP Negeri 3 Singosari, one of the public junior high schools in Malang, East Java, Indonesia. Based on the test result, the average student’s mathematical connection ability is 76.37 which are in good category. The students’ ability to connect between concepts that arise in solving systems of two-variable linear equations uses substitution and elimination using appropriate substitution algorithm or elimination procedures.
Hybrid learning in mathematics education: How can it work?
Authors: Cahyono A N , Asikin M
Published: November 2019

The aim of the study reported upon in this paper is to investigate what is the potential of hybrid learning in mathematics education, and which factors that are decisive in making it work in the mathematics classroom? An explorative study was conducted at the Department of Mathematics UNNES involving 30 students. consisted of an introduction session, a series of lectures conducted online and offline, and a debriefing session. This leads to the conclusion that factors for the success of hybrid learning in mathematics education include the corresponding material exploiting the learning management system features, regulation, supporting facilities, the role of the lecturer in facilitating the course, and students’ perception towards hybrid learning.
Ethnomathematics CMP learning-teaching model for improving capabilities in problem solving
Authors: Zaenuri  , Kurnia B , Dewi N R , Dwidayati N
Published: November 2019

This research was intended to analyze the effectiveness of ethnomathematic CMP learning-teaching model in improving students’ abilities in problem solving. The population for this research consisted of grade VII students of 2017-2018 period of SMP N 12 Semarang. The samples for this research were taken by means of cluster random sampling. By this technique we could get two different classes of samples; (1) experimental class taught using ethnomathematic CMP learning-teaching model and (2) control class taught using PBL (Learning-Teaching Model based purely only on classroom mathematical problems). The data for this research were collected using the ordinary tests and questionnaires. The data were then analyzed using t-tests; one-sample tests (for independent or individual samples) and paired-sample tests. From the analyses, we could draw the following conclusions: (1) the average capabilities of students taught with ethnomathematic CMP learning-teaching model were higher than those taught using PBL, (2) there were significant increases in the appreciation and love toward the local cultures in students taught with ethnomatic CMP.
Technological, pedagogical, and content knowledge math teachers: to develop 21stcentury skills students
Authors: Harits M , Sujadi I , Slamet I
Published: November 2019

This study aims to describe the ability of Technological, Pedagogical, and Content Knowledge of mathematics teachers and the way mathematics teachers use Technological, Pedagogical, and Content Knowledge in developing 21st-century students’ skills through math learning. This research was conducted in some junior high schools in Surakarta City. The subject of the research is the teacher of mathematics. The type of this research is qualitative research with case study approach. The data used were obtained from observations and interviews with 4 teachers. The results showed that the TPACK ability of all subjects at the medium level with a total mean of 2.75. The use of interactive media in learning, as well as the presentation of HOT problems through interactive media, can develop students’ critical thinking skills and can bring students creativity and innovation towards mathematics learning. The use of the drill method and the scaffolding approach can develop students’ critical thinking skills. Opening classes for discussion and question and answer can develop students’ communication skills. The use of cooperative learning models can develop students’ collaborative abilities with their peers, while also developing students’ communication skills.
Authentic assessment instruments for performance in mathematics learning in elementary schools
Authors: Yudha R P , Anggara D S , Zulaeha O
Published: November 2019

Products in the form of assessment instruments are packed in book form. Guidance on the use of authentic assessment instruments of the performance of elementary school students that contain; 1) assessment purpose; 2) the division of the syllabus; 3) lattice; 4) observation sheet; 5) rubric. This research is an R & D development model using Borg and Gall analysis that modifies researchers into three stages including: (1) introduction; (2) product development (development); (3) Presentation of product development result. Research subjects at SD Nurrusshidiq city Cirebon and SDN Karanganyar Cirebon City. Validity uses expert validation from four assessors with expert valuation techniques. Performance assessment comes from three evaluation experts, a mathematical instrument and one senior math teacher. (1) An overview of existing instruments in Cirebon Elementary School in Mathematics learning is that teachers still use the description of the tests in the classroom assessment process. (2) The stage of development of this study consists of the initial stage that contains the needs analysis, grid making, the manufacture of performance appraisal instruments, development stage consisting of expert validity test, small-scale test, and stage presentation consisting of large-scale experiments and test the practicality of the instrument. (3) Experimental results of the assessment.
A hybrid cryptosystem approach for information security by using RC4 algorithm and LUC algorithm
Authors: Rachmawati D , Budiman M A , Perangin-angin D F
Published: November 2019

Security is an essential aspect in the sending information. One of the data security methods is by using Cryptography. The methods used in this study, i.e., hybrid cryptosystem. The hybrid cryptosystem is one way of combining two different algorithms which are using a symmetric algorithm such as RC4 and asymmetric algorithm such as LUC. The RC4 algorithm will be used to encrypt or to decrypt files and LUC algorithm will be used to encrypt or to decrypt the key algorithm RC4. Tools that will apply to build the system are by using the Java programming language and Android Studio. Testing of the system utilizing encryption and decryption of files. The result of the system testing is the system will convert plain text into cipher text which in turn into the decimal using ASCII character code. In the algorithm LUC, the processing time required will be longer if the value of primes was a large number. Encryption and decryption time needed on both algorithms are proportional linearly with the length of the message. Based on the results of the research the average time needed to process the encryption with the RC4 algorithm and LUC are 287.06 ms and ms 74.86 whereas the average time for the process of decryption by using the RC4 algorithm and LUC was 53.43 ms and 94.26 ms.
Integrating character education in mathematics learning in Indonesia and Denmark
Authors: Sukestiyarno Y L , Cahyono A N , Pradnya I N
Published: November 2019

The purpose of this study was to compare the extent of success, lack of success, and its causes in integrating character education with mathematics learning in shaping the character of students in Indonesia and Denmark. The qualitative method by interviewing, observation, documentation and FGD was conducted involving 16 mathematics teachers and 20 students. The results showed that the integration of learning in Denmark succeeded in building character such as learning independence, work discipline, responsibility for completing tasks, curiosity in learning, but had not succeeded in bringing children to have a spirit of togetherness at work, friendliness in sharing physical communication science. While learning products in Indonesia are the opposite. This success occurs because the teacher assignment system is supported with the successful use of technology and the involvement of parents. The use of technology has had a less successful effect in Denmark. In order to support successful integration, learning must focus on the choice of one character for one mathematical competency, by using a spiral system for grade 1 to 12 education levels, the teacher assignment system must be able to involve the surrounding environment and utilize technological facilities.
Comparison study of Fibonacci code algorithm and Even-Rodeh algorithm for data compression
Authors: Rachmawati D , Budiman M A , Subada M A
Published: November 2019

The need for greater storage capacity is the cause of various compression techniques. By compressing, large data will be reduced in size to save storage capacity. This research will use Even-Rodeh code algorithm and Fibonacci code algorithm to compress the data. The performance of algorithms will be measured by Bitrate, Compression Ratio, Space Saving, and Compression Time (millisecond) and Time Decompression (millisecond). Compression is done by reading String in the text file, then Even-Rodeh Code algorithm and Fibonacci code algorithm create String code and perform compression process. The result of compression is the file with extension *. C and *. Fib which contains character information and String Bit. The results of compression can be decompressed to the original text file. The system test used a sample of Strings consisting of one type of character (Homogen String) and String comprising more than one kind of character (Heterogenous String) is stored in the text file by extension * .doc, * .docx, * .pdf. From the compression process on the homogenous String, the Fibonacci code algorithm is more efficient about the compression ratio of 0.25 and decompression time is 0.011 milliseconds compared with the Even-Rodeh code algorithm. While in the compression process on heterogeneous String Fibonacci Code algorithm is better than the Even-Rodeh code algorithm with an average Compression Ratio of 0.65 and decompression time faster with an average of 0.293 milliseconds.
Android-based online cattle card system for recording quality cattle in Semarang regency
Authors: Sugiharti E , Putra A T , Suyitno H , Subhan
Published: November 2019

The manual of cattle card system that contains the identity of each livestock has been made by the Ministry of Agriculture and Fisheries. The Informatics Engineering Study Program of Semarang State University through a research, had contributed to changing the manual of cattle card system into an Android-based online Information System (IS). The research by applying Science and Technology was carried out in Semarang Regency. The problem was how to change the manual of cattle card system into an Android-based online IS. Implementation of the research in Semarang Regency. The aim of this activity was that the recording of quality cattle in Semarang Regency could be changed from the manual of Cattle Card System to online Information Systems. The research activities were observations, interviews, collaborative activities, programming based on Android where the system was developed using the waterfall model, and triangulation.The result, an Android-based online IS prototype had been created to record quality cattle in Semarang Regency. This Android-based online IS had been registered to obtain intellectual property rights.
Enhancement strict avalanche criterion value in robust S-boxes construction using selected irreducible polynomial and affine matrixes
Authors: Alamsyah  , Bejo A , Adji T B
Published: November 2019

One indicator that a robust S-box is an ideal strict avalanche criterion value of 0.5. One method for applying the ideal strict avalanche criterion value is the selection of the precise irreducible polynomial and affine matrix. In this paper, we will discuss the robust S-boxes construction with the selected irreducible polynomial r(x) = x
8 + x
5 + x
3 + x
2 + 1 combined with the three selected affine matrixes i.e. t
1, t
2, and t
3. Hence, the combination of selected irreducible polynomial and affine matrixes results in S-box1, S-box2, and S-box3. The test of strict avalanche criterion shows that S-box2 and S-box3 produce the same value of 0.49951. Nonlinearity and bit independence criterion tests are also conducted to complete the S-box testing.This result shows S-box2 and S-box3 are the best S-boxes compared to S-box1 and S- boxes from previous studies.
Traffic control optimization on isolated intersection using fuzzy neural network and modified particle swarm optimization
Authors: Angraeni N , Muslim M A , Putra A T
Published: November 2019

Traffic density in big cities due to congestion problems in various points of the city. This problem will occur worse at crucial times such as when rush hours and active working hours. The existence of a traffic light system as a traffic signalling device is a solution to overcome traffic congestion. Appropriate traffic light settings can minimize vehicle waiting times at intersections. The aim of this study is to optimize an adaptive traffic control that can adjust the conditions of traffic flow on certain road segments at isolated intersections. In this study optimization uses methods of Fuzzy Neural Network (FNN) and Modified Particle Swarm Optimization (MPSO). The optimization results will be compared with a regular method of Adaptive Neural Fuzzy Inference System without using MPSO. The simulation results show that the efficiency and adaptability of the combination method of FNN and MPSO are better than the Neural Fuzzy Controller without MPSO. A better result is also indicated by the value of Mean Squared Error (MSE) that decreased from 6.3299 becomes 2.065.
Application of geographical information system for the 3d modelling of close-range photogrammetry for documentation and landscape development of historical monuments
Authors: Subiyanto S , Prastyo A D , Suprayogi A
Published: November 2019

Historical monuments, in the form of immovable objects such as temple buildings are part of our lives, they represent our history. Historic buildings must be preserved for future generations, by documenting buildings in 3D. Three-dimensional (3D) Geographic Information System (GIS) can be used for landscape development planning around the building. 3D-GIS with GIS analysis function to provide information related to geographical location and 3D visualization. 3D GIS models can be interpreted as digital representations of terrain and objects contained in around. In this study, the method used is a close range photogrammetry method for 3D modeling using a non-metric digital camera. For the stages of research implementation, the stages of camera calibration, object shooting, processing of 3D models are divided. For the calibration process, 80% is obtained, fulfilling the calibration requirements. The building modeling phase consists of Automated Projects, the process of calculating and creating 3D models, 3D coordinate transformations, 3D model visualization and statistical analysis. Documentation of Gedong Songo Temple in Semarang Regency. This study 3D model results testing is done by calculating the difference in the distance of the model with measurements in the field (terrestrial) with the Electronic Total Station (ETS) and the distance measuring Tape. The results of the distance comparison analysis obtained a maximum distance shift value of 4.00 centimeters and an RMS value of 4.69 centimeters. The values obtained are relatively small.
Leveraging technology for teaching practices: what teachers learnt from the Facebook group
Authors: Abidin Z
Published: November 2019

Facebook has attracted large attention from teachers and has created a paradigm shift in the field of education. Facebook has become a learning space for teachers to enhance teacher’s professional learning. This study investigates the potential offered by Facebook for the enhancement of teacher professional learning in integrating technology into teaching practices. The study results showed that participation in the Facebook group spurred teachers to continually explore new techniques and ideas in the use of technology to support classroom activities. Participation in the Facebook group also helped teachers to increase self-efficacy and self-confidence. Teachers became more confident to use new technological tools to reach specific curricular goals. The findings of this study provided evidence that learning in a virtual space has the potential to encourage teachers in transforming their instructional practices.
Implementation of PHPMailer with SMTP protocol in the development of web-based e-learning prototype
Authors: Sudana I M , Qudus N , Prasetyo S E
Published: November 2019

The usage of information technology has developed rapidly. At present, the information system has been widely used in various fields, including the education sector, through various web-based learning systems. Information system becomes an important factor in the process of decision making system, data management, document management, and performance efficiency. In the education sector, the development of information systems can be applied to the teaching and learning process. One of them is an e-learning as a new innovation in the learning process. The development of e-learning become a solution of learning to become more interactive and productive. This prototype use PHPMailer Library on the SMTP protocol which is an alternative tools in the e-learning development. The PHPMailer Library become an intermediary of e-learning in sending emails automatically. PHPMailer can provide information to users about the activities carried out. Teachers, students and parents can monitor the teaching and learning process and the learning outcomes through notifications that send from email. This study use a waterfall software research and development model, and Object Oriented Programming (OOP) programming concepts. The Tests show that this prototype is successfully with 100% accuracy with a good level of responsiveness. The system testing results indicate that e-learning can provide an email notification to teachers, students and parents during the learning process. The development of e-learning can also be accessed from various media or devices.
Acute effect of tomato extract (Lycopersicum esculentum) on rat’s (Rattus norvegicus) behavior and body weight
Authors: Iswari R S , Yuniastuti A , Susanti R
Published: November 2019

Tomato is one of the natural beneficial fruits. It contains lycopene, one of the effective carotenoids, also tocopherol, Vitamin C, Vitamin A and many more nutrition. Mostly, people consumes tomato uncontrolled. It commonly consumed in large quantities and for long periods of time. Based on that cases, it needs to be considered because the consumption of excess antioxidants can trigger a back reaction and increase pro-oxidant compounds. Therefore, this research was to determine the safety level of pure tomato consumption. This research is an experimental research with high tomato dose as treatments. Five group i.e. control (K) 0 mg/ individual tomato extract; K1, 16 mg/ individual tomato extract; K2, 160 mg/ individual tomato extract; K3, 1600 mg/ individual tomato extract; and K4 16.000 mg/ individual tomato extract. Natural tomato extract doses that used for supplementation did not have acute toxicity. The observed behavior in rats did not show any significant difference between treatment and control group. This is probably the dose used in the study is still in tolerant dose for rats metabolism. So, it can be concluded that there is no acute effect on consumption of lycopene extract from tomato.
Hypoglycemic effects of Aloe vera peel extract on type 2 diabetic rats
Authors: Christijanti W , Juniarto A Z , Suromo L B
Published: November 2019

Aloe vera is one of many medicinal plants used as hypoglycemic. Higher glucose levels are one of the characteristics of diabetes mellitus. This research aimed to study effectiveness of Aloe vera peel extract on insulin and serum glucose levels of rats with type 2 diabetic. Twenty Wistar rats were induced intraperitoneally using single dose of 65 mg/kg of streptozotocin (STZ) and 230 mg/kg of nicotinamide acid (NA). The rats were divided into control and treatment groups, which was supplemented using 100 mg/kg, 200 mg/kg and 400 mg/kg body weight of Aloe vera peel extracts for 28 days, respectively. The serum glucose levels were measured after three days of induction, 2 and 4 weeks after treatment, while the insulin levels were measured after three days of induction and at the end of treatment. In the control groups, the serum glucose levels in the second and fourth weeks remained significantly higher (p<0.05) compared to the treatment group. The insulin levels of the groups with Aloe vera peel extract was significantly higher than control group. Aloe vera peel extract exerts hypoglycemic effects by reducing the blood glucose level and improving insulin secretion on the type 2 diabetic rats.
Species richness of the butterflies (order: Lepidoptera) in Mount Ungaran, Central Java
Authors: Rahayuningsih M , Azinar Ahmad T , Mukaromah A
Published: November 2019

Mount Ungaran is an area that has a relatively high biodiversity potential, including butterflies. The diversity of ecosystems in the Ungaran Mountains such as natural forests, plantations, fields, and settlements are the factors for diverse of biodiversity. Butterflies are one of the most important assemblages of insects that act as biodiversity indicators as well as the ecosytems. The objective of the research was to analyze the species richness of the butterfly (order Lepidoptera) in Mount Ungaran and their conservation status. The research was conducted on five (4) station, there are Medini, Gadjah Mungkur, Semirang and Banyuwindu. Time of the research start from January to June 2018. The method of the research using point count method and analysis by description qualitative. The Result showed that total 62 species (5 Family) of Lepidoptera was recorded, followed by Nymphalidae (39 species), Papilionidae (11 species), Pieridae (9 species), Lycaenidae (3 species), and Hesperidae (2 species). There was one species was protected by Indonesian ruler and CITES appendix II (Troides helena), two species were endemic of Java (Prioneris autothisbe and Mycalesis sudra), and two species was LC (Least Concern) by IUCN red list data (Lampides boeticus and Vanesa cardui).