bluuebunny/crossref_metadata_2025 huggingface dataset:
Using of low grade zeolite based fly ash as slow release agent for Zea mays growth
Authors: Jumaeri  , Sumarni W , Ningrum L W , Rahayu E F
Published: July 2020

The present work introduce synthesis low grade zeolite from fly ash and its application as urea slow release agent onZea maysgrowth. The characterization of the synthesized zeolites were determined using X ray diffraction method and FT-IR spectroscopy. The zeolite that has been formed is added to urea fertilizer with a weight ratio of urea: zeolite as follows 1: 1, 1: 2, 1: 3. As much as 3 kg of soil is put in a polybag series and was added with 3 g urea slow release fertilizers. The polybags were planted withZea maysplant 1 week in old at a depth of ± 5 cm. The plant growth parameters which include plant height plant, number and colour of leaves were observed every 7 days for 4 weeks Base on the diffraction pattern and IR spectra, the characteristics of the synthesized zeolite is matching with standard zeolite A. The use of urea slow release fertilizer onZea maysplants showed better growth than using urea fertilizer without zeolite slow release ingredients. The treatment of soil with urea/zeolite 1:3 proven to produce the bestZea maysgrowth in interaction time 4 weeks.
Students’ innovative and creative thinking skill profile in designing chemical batik after experiencing ethnoscience integrated science technology engineering mathematic integrated ethnoscience (ethno-stem) learnings
Authors: Sudarmin  , Sumarni W , Mursiti S , Sumarti S S
Published: July 2020

This research aims to measure the innovative and creative character of Chemistry students in batik motifing of Chemical structures after learning natural products with the integrated STEM approach Ethnoscience. This type of research is a qualitative descriptive study with students of Chemistry education at UNNES taking Natural Product courses as a subject. Instruments data collection are questionnaires, interviews, the value of chemical batik products, and creativity in describing the meaning of batik motifs, appearance, origin, and color creations that have been designed on canvas. Chemical batik products produced by Ethno-STEM Project study were assessed by a research team and batik experts from Zie Batik Malon Gunungpati and batik experts from Pekalongan to determine which batik motifs are feasible to be produced as a form of research downstreaming. The final result of the batik design was decided that four decent batik products were produced in terms of motifs, color display, originals, and interesting creativity according to the judgment of batik experts. The four innovative and creative batik motifs with high scores are the anti-Christian batik motif, alpha pinene, curcuminoid, and Etbo-STEM carotenoids. From the results of this study it was concluded that the profile of innovative and creative character of students after learning with the Etno-STEM approach is very good.
The effectiveness of the quizizz interactive quiz media as an online learning evaluation of physics chemistry 1 to improve student learning outcomes
Authors: Purba L S L
Published: July 2020

This study uses a quantitative approach with experiment. The population in this study were all students of the Faculty of Chemistry Education Teacher Training and Education (Guidance and Counseling) Indonesian Christian University (UKI), which follows the course of Chemical Physics 1. The purpose of this study was to determine the effectiveness of an interactive quiz quizizz as a medium of learning on-line evaluation of the course of Physical Chemistry 1. Data collection techniques used is a test instrument as much as 10 multiple-choice questions that have been testing the validity of the expert validator. Data analysis technique used is the non-parametric Wilcoxon Signed Rank Test. UseIBM SPSS 23. From the analysis of data obtained asymp. Sig. (2-tailed) was 0008, of which 0.008> 0.05. Because the value is less than 0.05, it can be concluded that the use of an interactive quiz quizizz as a medium for on-line evaluation of learning in the subject of physical chemistry 1 effective against student results.
The effectiveness of guided inquiry learning based on contextual to improve chemistry literacy ability of senior high school students
Authors: Wardani S , Anggraeni A Y
Published: July 2020

This research aims to determine the effectiveness guided inquiry learning based of contextual to improve chemistry literacy ability of students. This is an experimental research with pretest-posttest control group design and cluster random sampling as sampling techniques. The samples of this research are two different classes of X MIPA. The ability of chemistry literacy is tested using chemistry literacy test and questionnaire. Data analysis uses T-test, N-gain, classical learning pass, and questionnaire data descriptive analysis. The result of this research provided average score of posttest of chemistry students literacy of experiment group 72.86 and 63.42 for control group. Classical learning pass of experiment group is 78.57% and control group is 38.71%. N-gain analysis result provided the ability of chemistry literacy in every aspect of experiment group is better than control group. T-test result are tcount 3.66 and is bigger than ttable 2.00, it means that the ability of chemistry literacy of students in experiment group is better than the one in control group. Questionnaire analysis result provided around 68% in good category. Based on research results, it can be concluded that by using guided inquiry learning based of contextual, students’ chemistry literacy ability is improved significantly.
Increase the hierarchy concept map score through the modification in the 2ndstage of problem-based learning
Authors: San S M , Widoretno S , Ariyanto J , Sajidan  , Dwiastuti S
Published: July 2020

The research aimed to calculate the increase of student’s hierarchy concept map (CM) scores through the modification of problem analysis and learning issue (2ndstage of problem-based learning (PBL)) using question instructional techniques. The type of research is classroom action. Research subjects were 36 X grade students. Research procedures: planning, action, observation, and reflection. Research data is the percentage of hierarchy CM score which is calculated based on the Expert CM score according to the material in each cycle. Data validity is done by confirming the percentage of hierarchy CM score with the result of interviews and documentation of the learning process in each cycle. The analysis techniques use reduction, presentation, and drawing a conclusion. The results show that the average increase in hierarchy percentage scores from pre-cycles to cycle I was 25% and cycle I to II was 38%. The number of students who experienced an increase in percentage hierarchy scores from pre-cycle to cycle I was 83% and cycle I to II by 90%, thus the modification of instructional techniques in problem analysis and learning issues PBL increased the students’ CM hierarchy score.
Students’ literacy profile on STEM-blended learning implementation in ecosystem material
Authors: Ngabekti S , Partaya  , Martin HB P , Nugroho BT
Published: July 2020

This study aims to analyze the student literacy of students of Biology Education Department FMIPA Universitas Negeri Semarang in because of the implementation of blended learning base on STEM in Ecosystem material. This research method was quantitative research with an experimental approach using “One Shoot Case Study” design. The implementation of blended learning would consider to be successful if accomplished three aspects: (1) the implementation scenario runs well in accordance with the specified time allocation, (2) students reaches the moderate to a high level of technological literacy, (3) the implementation is successful with no severe obstacles while student response it positively. The results exposed that the middle of the second semester could accomplish the implementation of blended learning base on STEM in the Ecosystem material. This research shows that student science literacy has reached mastery learning, with AB (14%), B (72%), and BC (14%). Student technology literacy achieved very high scores. That was the highest one compared to other STEM components: science literacy and mathematics literacy. Student technology literacy ranges from 74.4-93.5, with mastery learning. Students’ mathematical literacy ranged from 42-76, with an average of 58.32, including the low category. Furthermore, most of the students expressed positively on the use of the Edmodo application, which contains an introduction and videos. The founded drawback was the technology used was still simple, and the steps in using technology tools in blended learning were incomplete.
DKI Jakarta vegetable food commodity inflation modeling with tsclust approach using k-error method
Authors: Sumertajaya I M , Aidi M N , Safitri E , Rahkmawati Y
Published: July 2020

Inflation is a critical indicator in showing economic symptoms about prices in a region. The Province of DKI Jakarta is the nation’s capital city which plays an important role in the national economy including national inflation. An interesting commodity group is foodstuffs because it contains commodities that play a significant role in inflation in DKI Jakarta. TSClust approach was able to reduce the model by first bundling the commodities together. K-Error is a clustering method that incorporates the error element related to data to be clustered into the clustering step. The purpose of this study is to forecast inflation in Jakarta’s agricultural food commodities with the K-Error. Clustering with the K-Error resulted in a lower pseudo F value as the number of clusters increases. Next, the selection of optimum number of clusters was based on a stable pseudo F value, such as the value k = 4 to k = 8. Based on the RMSE value, the optimum number of clusters selected is 5 clusters with unique models. Based on the RMSE value, it can be seen that forecasting at the individual level produced RMSE values that were not significantly different from RMSE level of the cluster for each commodity.
Dynamic model of disease spread with two infection stages
Authors: Rifanti U M
Published: July 2020

The spread of infectious diseases has always been of concerns and a threat to public health. It has caused serious problems for the survival of human beings and other species. In epidemiology, mathematical models are the basic conceptual tools used to understand epidemic dynamics and to formulate control strategies. A mathematical model of the transmission dynamics of infectious disease is an important theoretical epidemiology method, which has been used to simulate in analyzing and control of infectious diseases. In this paper, we will discuss about disease model with infection-stage structure, where the period of infection is partitioned into two stages: the acute and the chronic stages. The disease-free equilibrium was locally asymptotically stable whenR0< 1 and the endemic equilibrium was locally asymptotically stable whenR0> 1.
Application of the spatial empirical best linear unbiased prediction method for estimating per capita expenditure in Lampung province
Authors: Widiarti  , Oktafiani DD , Usman M , Kurniasari D
Published: July 2020

Spatial Empirical Best Linear Unbiased Prediction (SEBLUP) is one of the methods in small area estimation. This method is the development of EBLUP by observing the influence of random spatial correlated areas. One application of this method is the estimation of per capita expenditure in each district/city in Lampung Province. This estimation is based on the existence of additional information on the number of births of the population from each district/city. In this study, the SEBLUP method was applied to the two-level model Normal-Normal and weighting matrix determination based on the type of queen contiguity. Based on the monthly household expenditure data in the Province of Lampung in 2017, Bandarlampung and Metro are areas with high per capita income levels.
The effectiveness of problem based learning (PBL) model with ethnomatematics to improve mathematics literation ability of high school students
Authors: Zaenuri  , Imam F , Nugroho S E
Published: July 2020

The purpose of this study is to determine the effectiveness of the problem-based learning model with nuances of ethnomatematics on the ability of mathematical literacy. The study was conducted at SMA Negeri 1 Mranggen. The research method used is a combination research method with a concurrent embedded model. The sampling technique uses cluster random sampling. Data collection uses documentation, questionnaires, test results, and interviews. The results showed the model of problem-based learning nuanced effective ethnomatematics against students’ mathematical literacy abilities.
Developing mathematics learning materials of fifth grade of elementary school integrating mathematics game, problem posing, and manipulative
Authors: Kurniasih A W , Hidayah I , Asikin M
Published: July 2020

The purposes of this study were obtained the validity, practicality, and effectiveness of the learning tools that have been integrated teacher stimulus that has been formulated in the design of mathematics learning of fifth grade of elementary school. This development research refers to the 4-D development model developed by Sivasailam et al. (1974) consisted of 4 stages of definition, design, development, and disseminate. This research did not reach the fourth stage. The learning model used is 1) Teams Games Tournament model with the research subjects of Plalangan 1 public elementary school students as many as 44 students with integrated stimulus were problem-posing and the use of manipulative teaching aids, 2) Creative Problem Solving with research subjects Pakintelan 1 public elementary school students with 25 students with stimulus that is integrated were a mathematical game and the use of manipulative. The research instruments were mathematical games, math game discussion sheets, test sheets, problem-posing discussion sheets, tests containing problem posing, student response questionnaire sheets, learning material validation sheets, and learning implementation sheets. The results showed that the learning materials in Plalangan 1 that integrated stimulus problem posing and the use of manipulative were valid, effective, and practical. The results showed that the learning tools in Pakintelan 1 that integrated the stimulus of mathematical games and the use of manipulative were valid, effective, and practical. The further research by applying mathematical stimulus games, problem posing, and the use of manipulative to describe high-level thinking of elementary school students.
Mathematical imaginations and constructing algebraic concept
Authors: Dwijayanti I , Nugroho A A
Published: July 2020

Imagination has a valuable role in the process of education for humans. The purpose of the study to determine the role of mathematical imagination to construct an understanding of mathematical concepts. The purpose of this qualitative exploratory study was to analyze students’ gestures in understanding algebraic expression. It involved 32 in Junior high school students in Semarang city. Time triangulation was utilized to assure data validity. The results showed that students employed. The results: 1) imagination involved to understand the concept of variables, coefficients or constants is perception visualization that presents the possibility of actions representing a container, representing sum of objects in a container and representing representing sum of objects; 2) imagination in other processes is perception visualization that presents the possibility of action giving examples of algebraic expression, giving examples rather than algebraic expression, and identifying equations. This study yields an important description of misconceptions that are detected through students’ imagination.
To grow a joyful learning in SLB through a manipulative teaching aid based on multi-function video
Authors: Sugiman  , Suyitno Hardi , Walid
Published: July 2020

Students in SLB need to be given a joyful learning. The problems were: (1) How to identify the need for Manipulative Teaching Aids based on Multi-Function Video? (2) How was the analysis of the growth of Joyful Learning in SLB students through the application of Manipulative Teaching Aids based on Multi-Function Video? The goals: (1) To identify the need for Manipulative Teaching Aids based on Multi-Function Video. (2) To foster of Joyful Learning in SLB in mathematics learning through the application of Manipulative Teaching Aids based on Multi-Function Video. The research method is a qualitative approach. Main Activities: (1) Identifying the need for manipulative teaching aids for SLB students (2) analyzing how to grow a Joyful Learning in SLB in mathematics learning, (3) implementing Manipulative Teaching Aids based on Multi-Function Video to support the growth of Joyful Learning in SLB in mathematics learning. (4) conducting interviews with research subjects; data analysis; and triangulation. The results: (1) Identified needs of Manipulative Teaching Aids based on Multi-Function Video for SLB. (2) Joyful Learning grows in SLB through the application of Manipulative Teaching Aids based on Multi-Function Video.
Development of ICT-assisted preprospec learning models
Authors: Dewi N R , Arini F Y , Ardiansyah A S
Published: July 2020

The main objective of this research is to develop an ICT-Assisted Preprospec Learning Model. This learning model was developed specifically for learning mathematics and consists of five stages, namely Prepare, Problem Solving, Presentation, Evaluation, Conclusion which at some stages use media based on Information and Communication Technology (ICT). The use of media based on ICT is intended to make learning more effective and efficient. In addition, abstract mathematical characteristics, using a lot of graphics and images and being applied in real life and other scientific disciplines are considered to use ICT-based media in learning. The ICT-Assisted Preprospec Learning Model is expected to improve mathematical problem solving abilities as the heart of mathematics and student’s self-renewal capacity. The development of this ICT-assisted Preprospec Learning Model uses the ADDIE Model which consists of 5 stages, namely analysis, design, develop, implement and evaluate. The results of this study indicate that ICT-assisted learning model Preprospec valid and ready to be used for learning.
ASPIRE model (analysis, scaffolding, project, investigation, reaction, and evaluation) for mathematical creative thinking ability
Authors: Munahefi D N , Kartono  , Waluya S B , Dwijanto
Published: July 2020

ASPIRE model is an innovation in mathematics learning that is expected to develop mathematical creative thinking ability. The aspects of the ASPIRE model consists of analysis, scaffolding, project, investigation, reaction and evaluation. The research aims to describe the steps of the ASPIRE model. analysis is the stage where students are analyzed their abilities through filling out questionnaires or online tests so the teacher understands the ability of students and gives them treatment according to their abilities. Scaffolding stage is the provision of assistance, motivation, and direction to students in conducting learning activities. Project stage is implementing learning material in a project assignment. Investigation stage is the process of investigating the results of project tasks and communicating them so that they can be compared with the acquisition of others. Reaction stage is applying of problems related to the material in project task. Evaluation is the stage of testing the ability of students individually. The ASPIRE model is a combination of project-based learning models, problem-based learning, and investigative learning that all three learning models are considered capable of developing mathematical creative thinking ability.
Growth of student mathematical creativity as part of 4C competence for entering the 21st century
Authors: Suyitno A
Published: July 2020

The purpose of this article is to examine the lecturers’efforts to foster students’ Mathematical Creativity as part of the 4C Competency to enter the 21st Century, which students must have. The review of this article is based on the results of the Dissertation research conducted by a qualitative approach. The subject of this research, by taking 6 students of Mathematics Education of FMIPA of UNNES. The main activities of this basic research were: (1) identifying the scaffolding stages by the lecturer to foster students’ Mathematical Creativity; (2) analyse the fundamental thinking to foster students’ Mathematical Creativity through the provision of open ended problems. The results: (1) The scaffolding stage was identified by the lecturer to foster students’ Mathematical Creativity. (2) Obtained the results of an analysis of fundamental thinking to foster the students’ Mathematical Creativity through the provision of open ended problems. Suggestion: To prepare the students as teachers candidate in the 21st century, students need to grow their Mathematical Creativity competencies. Students must also be trained to be able to create of open ended problems based on HOTS.
Development of assesment instruments to measure quality of MOOC-Platform in engineering mathematics 1 course
Authors: Yuniwati I , Yustita A D , Hardiyanti S A , Suardinata I W
Published: July 2020

Industry Revolutionary Era 4.0 requires changes in the organization of learning. Learning is implemented without any concept of time and space. Engineering Mathematics 1 Course has developed MOOC Platform. The aim of this research is to develop assesment instrument and to measure quality of the platform. This assesment instrument is developed by using Plomp Model. Plomp Model consists of five phases, they are; the design phase; the construction phase; test, evaluation, and revision phase; the implementation phase. There are 20 items in this assesment instrument. The 20 items were devided in three indicators. Validation has done by 3 experts. Then the instruments were gived to 100 students. Results from this research consist of 8 items which are valid and reliabel. Value of reliability is questionable.
Performance assessment of geometry mathematical representation ability viewed from student interest
Authors: Masrukan  , Elmagustilla S R
Published: July 2020

This research aimed to test whether learning with cooperative Jigsaw material geometry with performance assessment achieve mastery learning, test whether the ability of the mathematical representation of students with cooperative learning model Jigsaw material geometry with the assessment of performance is better than the ability of the representation of the students on the model of Discovery Learning, a description of the ability of the mathematical representation students on cooperative learning model Jigsaw with the assessment of student interest. This study is a mixed methods research. The subjects were students of class VIII-A one of junior high school in Kaliwungu, Kendal, Central Java. The data collection method using tests, questionnaires and interviews. The results show that: mathematical representation abilities of students who receive Jigsaw cooperative learning on geometry material with performance assessment fulfill the completeness of learning, mathematical representation abilities of students on geometry material in Jigsaw cooperative learning with performance assessments better than mathematical representation abilities of students on Discovery Learning, and descriptions of mathematical representation abilities students in the Jigsaw cooperative learning with performance assessments in terms of students interest learning that students with high learning interest are able to fulfill indicators of mathematical representation ability is very well, students with learning interest are able to fulfill indicators of mathematical representation ability well and students with low learning interest are less able to fulfill the indicators of mathematical representation ability.
Mathematics learning in elementary school that integrates with nation’s culture and integrity: a research trip in Japan
Authors: Suyitno H , Zaenuri  , Sugiharti E , Suyitno A , Baba T
Published: July 2020

Japan is a country that respects the Nation’s Culture and has Integrity that can be emulated. The problem was: What was the role of Elementary School teachers in increasing of Nation’s Culture and Integrity of their students through mathematics learning? The research method was a qualitative approach. Stages of activities: (1) Guided by a Partner Lecturer from IDEC of Hiroshima University, the UNNES research team conducted a class visit to the Elementary School (ES) in Hiroshima, namely Attached ES of Hiroshima. (2) Conducting observations, interviews, documentation studies, and FGD with the Elementary School teachers, IDEC students, and Partner Lecturer. The results: (1) Teachers and students have a high sense of Integrity in learning. (2) The teacher plays a role in preserving the cultural values of the Japanese nation. (3) Provision of mathematical problems associated with ethnomatematics and Japanese cultural products. Additional results: (1) In Japan applying the Problem Based Learning of learning model. (2) Teachers and students were very polite in getting along. (3) The condition of the school looks clean, healthy, and orderly.
Mathematical communication ability in knisley mathematics learning model
Authors: Dewi N R , Kamila N R , Mashuri  , Wijayanti K
Published: July 2020

The purpose of this research was to analyze the effectiveness of Knisley Mathematics Learning Model on students’ mathematical communication ability. Type of this research was quantitative research. The population in this research was grade VII students of one of junior high school in Semarang at 2018/2019 school year. With cluster random sampling technique, class VII H was obtained as an experimental class with Knisley Mathematics Learning Model and class VII G as a control class with Problem Based Learning models. Data collection includes tests of mathematical communication ability. Data were analyzed by classical completeness test, average difference test, and proportion test. The results showed that: (1) mathematical communication ability with Knisley Mathematics Learning Model had not yet reached classical completeness ie 59% while control class completeness was 36%, (2) the average achievement of students’ mathematical communication ability in the Knisley Mathematics Learning Model class was higher than the average achievement students’ mathematical communication in Problem Based Learning Model classes, and (3) the proportion of students’ mathematical communication ability achievement in the Knisley Mathematics Learning Model class is higher than the proportion of students’ mathematical communication ability achievement in Problem Based Learning Model classes.
Financial feasibility analysis of small industry of mathematical manipulative
Authors: Hidayah I , Masrukan  , Margunani
Published: July 2020

Learning Mathematics effortlessly and pleasantly is one of the strategies for children to master concepts, mathematical principles, and be capable of solving mathematical problems. In accordance with children mental development, the existence of manipulatives (concrete) is required by children to fulfill the above objectives. Along with technology development, manipulatives have also been developed to support students’ thinking abilities based on the demands of the ongoing curriculum. One of the objectives of this study was to conduct a financial feasibility analysis of commercial of mathematical manipulatives. Indicators of commercial feasibility used in this study were Break Event Point (BEP) analysis, Net Present Value (NPV), Internal Rate of Return (IRR), Net Benefit Cost Ratio (B / C Ratio), and Pay Back Period (PBP)). The steps in analyzing financial feasibility of manipulatives production business in this study were to calculate: (1) Fix Cost, (2) Variable Cost, (3) Production Cost, (4) Cost of Goods Manufactured and BEP Analysis (5) Investment Feasibility (IRR analysis, NPV, B / C Ratio, and PBP). The results of the analysis showed that the production of manipulatives in this study was feasible as a commercial business with BEP occurred when sales of manipulatives made from wood were 3 sets, Evafoam were 18 sets, and paper were 7 sets, NPV was 574,126,261 per year, IRR 50% > interest level at 12%, B / C ratio of 1.50247> 1 (profitable), and PBP occurred 2 years 11 months 29 days.
Students’ metacognition process in solving contextual problems based on gender
Authors: Alqurni S , Usodo B , Saputro D R S
Published: July 2020

The purpose of this study is to describe the student’s metacognition process in solving contextual problems based on gender. The subjects in this study consisted of one male student and one female student. The research location is in SMPN 23 Surakarta. The results of this study showed that at the planning stages, male student has been able to identify what is known and what is being asked and being able to choose and believing the strategy. In the monitoring stage, male student didn’t monitor the constructions or calculations and didn’t believe the truth. In evaluating stage, male student didn’t recheck the suitability of the results, didn’t recheck to the work steps and the calculation, didn’t believe the truth of the result. In the in planning stage, female student has been able to identify what was known and what was asked, but didn’t believe the strategy chosen. In the monitoring stage, female student didn’t monitor the step of completion and sustainability strategy that has been planned and didn’t believe the truth. At the evaluating stage, female student didn’t check the compatibility of the answers and didn’t recheck every work and didn’t believe in the correctness.
Fragmentation of thinking structure and its impact to students’ algebraic concept construction and problem solving
Authors: Usodo B , Aulia I I , Wulandari A N , Sutopo  , Setiawan R , Kurniawati I , Kuswardi Y
Published: July 2020

The term “fragmentation” is adopted from the term of data storage which is used inefficiently in a computer. The analogy of fragmentation in thinking process is inefficient phenomenon of information storage within the brain which obstructs the process of reconstructing and solving mathematical problems. This descriptive qualitative research aims to describe the fragmentation of thinking structure and its impact on concept construction and algebraic problem solving in Junior Highs School Students. The subjects consisted of 8th grade students of junior high school in Surakarta, Indonesia. Data of this research were collected using a task-based in-depth interview method. This research shows that the students have the following fragmentation of thinking structure: (1) pseudo construction, which occurs when the students’ answers seem right even though the reasoning are wrong, (2) hole construction, which occurs when students do not thoroughly understand the concepts of addition, multiplication, algebraic power forms, and mathematical problems-modelling, (3) mis-analogical thinking, which occurs when students consider an algebraic form to be the same as another algebraic form.
Fragmentation of thinking structure: concept construction and problem solving in geometry of junior high school students
Authors: Wulandari A N , Usodo B , Sutopo  , Setiawan R , Kurniawati I , Kuswardi Y , Aulia I I
Published: July 2020

Fragmentation is adopted from the term of inefficient data storage in a computer which is used to describe thinking fragmentation. The purpose of this study is to describe the fragmentation of geometrical concepts in junior high school classified into: hole construction, mis-connection, and mis-analogical construction. This study used descriptive qualitative research method with the subjects of 8th grade students in Surakarta. Data collection in this study was conducted by task-based interview method. Qualitative descriptive analysis through the stages of reduction, representation, and interpretation of data. Hole construction occurs when students do not construct concept completely (20%). Mis-connection occurs when students make mistake in making connections between concepts (40%). Mis-analogical construction occurs when students analogizing a concept with another concept in geometry which is a mistake (20%). From the analysis result, defragmentation of thinking structure in geometry can be done with scaffolding to bring up scheme, knite scheme, and improve of analogic thinking.
Development of learning innovations and MiC (mathematics in context) teaching materials to strengthen character friends of the earth
Authors: Dwidayati N , Zaenuri
Published: July 2020

The purpose of this study is to find a model for developing learning innovations and MiC teaching materials to strengthen the character of Sahabat Bumi. This study uses a quasi-experimental design. This research was conducted at MAN 1 Kudus Regency, Central Java Province. The study population was students of class X MAN 1 Kudus Regency. The research sample of 2 classes, taken by cluster-random-sampling technique. Experimental class students were taught using a PBL model with a MiC nuance, while control class students were taught using an expository model. Data were collected using tests, then analyzed descriptively and inferential statistics, using t-tests (independent samples t-test). The results showed (1) learning PBL nuanced MiC in the culture of the Holy community which can improve the ability of the amtematic representation and character of earth friends and (2) various forms of MiC in community culture related to mathematical concepts, so that it can be integrated in mathematics learning at the MA level
Cooperative learning model with ethnomathematics nuances to improve the love of local culture and ability of problem solving
Authors: Zaenuri  , Mukeriyanto  , Mulyono
Published: July 2020

This research aimed to find out the effectiveness of cooperative learning model with ethnomathematics nuances to improve local culture love and problem solving skill. This experimental research took population from VIII graders of SMP N 1 Gemawang, Temanggung in academic year 2018/2019. The sample was taken by random cluster sampling. The sample consisted of VIII D students as experimental group and VIII A as control group. The technique of collecting data consisted of observation, test, documentation, and questionnaire. The data was analyzed by z-test, independent t-test, and paired sample test. The findings showed that 28 students of experimental group reached the passing grade with average 77.5 while 28 students of control group reached the passing grade with average score 67.5. The hypothesis test showed that students taught by cooperative learning with ethnomathematics nuances classically reached the passing grade. The average obtained by experimental group was higher than the control group. Improvement of local culture love and problem solving skill of experimental group was better than control group.
Product assessment of mathematical representation ability viewed from student’s cognitif style
Authors: Masrukan  , Khairunnisa M
Published: July 2020

The mathematical representation ability in Junior High School 1 Bojong, Pekalongan, Central Java is still not optimal. For this reason, one of the methods that can be used to increase the ability of mathematical representation is cooperative learning type Two Stay Two Stray with product assessment. This research aims to obtain the effectiveness of the learning and analysing students’ mathematical representation abilities in terms of the reflective-impulsive cognitive style. This research used Mixed Methods with Explanatory Sequential Design. The population in this study was class VIII Junior High School 1 Bojong with research samples namely classes VIII A and VIII C which were selected using cluster sampling techniques. The subjects of this study were 4 students of class VIII C. Data collection techniques used include: observation, documentation, tests, and interviews. The results showed that: (1) Two Stay Two Stray learning with product assessment on the achievement of students’ mathematical representation abilities is effective, namely achieving classical completeness, the average mathematical representation ability of experimental class students is better than the control class, and there is a positive influence of style cognitive ability of students’ mathematical representation; (2) description of the ability of mathematical representation in terms of the reflective-impulsive cognitive style is as follows: a) reflective students are able to make geometry drawings well and translate images to clarify problems well, can make mathematical models well and solve them by involving mathematical expressions properly, and are able write concluding steps in a concise and clear manner and answer questions with words correctly;b) impulsive students are able to make geometry drawings well and translate images to clarify problems well, but sometimes make mistakes, can make mathematical models well and solve them by involving mathematical expressions correctly, but sometimes make mistakes, and are able to write steps a concise and clear solution and answer questions with words correctly, but sometimes make mistakes.
Teachers’ perceptions of their use of SPADA Brightspace: A professional education for in-service teacher context
Authors: Arifudin R , Abidin Z
Published: July 2020

The Directorate General of Learning and Student Affairs developed a program named professional education for in-service teachers. This program applies a hybrid learning model. The adoption of the hybrid learning model is considered appropriate in the industrial revolution 4.0 era. The teacher professional development program is no longer just a face-to-face course but also can be held in the online form. The online course has been performed using SPADA Brightspace, an e-learning system. This study aims to analyze teachers’ perceptions of using the SPADA Brightspace for online learning. A questionnaire survey technique was used for collecting data. The study results showed that the teachers have positive acceptance towards SPADA Brightspace. The teachers perceived the usefulness of SPADA Brightspace to support their online learning process in the in-service teacher professional development program (PPG DALJAB). The use of SPADA Brightspace increases the productivity of teachers because they can manage their time and control their own learning pace. The teachers are also easier to do knowledge sharing by active participation in online discussion forums.
Elena as a learning management system for supporting blended learning: Do students perceive Elena as useful?
Authors: Abidin Z , Rokhman F , Syaifudin A , Subagja M
Published: July 2020

The rapid development of technology in the fourth industrial revolution era has a significant role as a catalyst in developing, changing, and innovating in the field of education. Technology support for learning activities has become a necessity. Learning is not only performed face-to-face but can also be combined with online learning. The combination is called blended learning. Universitas Negeri Semarang (UNNES) as a higher education institution plays a role in creating a conducive academic environment so that the students’ learning process is effective and meaningful. UNNES developed Elena to facilitate blended learning. This study aims to explore students’ perceptions in their use of Elena as a learning support tool. Questionnaires consisted of 27 Likert-scale items were administered to students. A number of 435 students participated in this study. The results revealed that students perceived that the use of Elena to support their learning activities. The result of the study revealed that students perceived the usefulness of Elena to conduct different learning activities. The students also perceived that Elena as a learning management system had fulfilled their expectations.
Development of big data system of LP3 UNNES to support excellent service of LPTK on international reputation
Authors: Sugianto  , Ngabiyanto  , Prabowo A , Arfriandi A
Published: July 2020

Semarang State University, Education and Professional Development Institute (LP3) is a public service institution integrated with the Semarang State University Institute (UNNES). As a public service institution, LP3 is bound by regulations related to service satisfaction and service statistics as part of public accountability. In fact, as a public service institution overseeing services in the fields of PPL, PPG, MKU / MKDK, Career and Counselling, as well as Language and Training services, LP3 does not yet have a qualified DSS. An outline of the research method used in detail was explained as follows: Retrieve Data; Development System; Operation. Based on the results and discussion, it can be seen that building a LPS DSS requires quite a long time. The data in LP3 comes from inhomogeneous forms and varied sources. We conclude that the DSS of LP3 UNNES was going well. The website of data.lp3.unnes.ac.id can be utilized by the community as a decision support system.
Expert system to determine healthy food menu for heart and cardiovascular disease therapy
Authors: Wahyuni EG , Haritsah N
Published: July 2020

Cardiovascular disease is a disease caused by disorders of the heart and blood vessels. This disease is very dangerous for health because of the vital cardiovascular system. One of the most important organs associated with this disease is the heart. But there are still many people who are less concerned about their heart health. Therefore it takes a variety of therapies for the prevention or treatment for those already diagnosed with cardiovascular disease. Eating healthy foods is one of the best prevention or treatment. This expert system intends to help patients find out about heart disease. In addition, the system is also used to provide information about a healthy diet for the patient. This system design uses PHP programming language and is displayed in the form of a website. The patient or user may consult by entering personal data such as age, sex, height, weight, and symptoms suffered by using this system. The system will display possible illnesses and food menu recommendations.
The use of ADDIE model to re-create academic information systems to improve user satisfaction
Authors: Marzal J , Saputra E , Suratno T , Mauladi  , Saharudin  , Elisa E
Published: July 2020

User satisfaction is something that needs to be improved to realize the success of an information system. This study aims to redesign and recreate academic information systems in order to increase user satisfaction. The model used in application development is ADDIE because it has enough space in accommodating user participation, building trust in new applications through the data migration process, and changing culture through a limited set of applications. Meanwhile, user satisfaction is explored with the success of information systems model by DeLone and McLean (2003). The results of this study indicate that the ADDIE is an effective model in recreating academic information systems to increase user satisfaction. There is an increase in the influence of system quality, information quality, and service quality factors on user satisfaction from 65% in the legacy SIAKAD to 81% in the new SIAKAD. Meanwhile, user satisfaction significantly increased, namely an average of 17.7 in the legacy SIAKAD to 19.22 in the new SIAKAD.
Optical character recognition and long short-term memory neural network approach for book classification by librarians
Authors: Rosita YD , Sukmaningtyas YN
Published: July 2020

The book is classified by librarians that use Decimal Dewey Classification (DDS) System. It is used for cataloging and indexing books. DDC has three divisions, a ten, a hundred, and a thousand. The book subject is reflected in each division. Commonly, to know the book content, librarians read the book title. Then, they identify the book index in DDC system. Nevertheless, it requires more time. To read the book title, Optical Character Recognition (OCR) aids them to get the book title efficiently that convert the image of the book cover into the text-editable. Librarians use a web camera to scan the book cover, especially the book title area. There are three steps for pre-processing, the lowercase changing, the useless word removing, and tokenizing. To detect the book categories, Long Short-Term Memory Neural Network is good implemented in this research. It is almost used for text classification. In this research, It gives high performance that achieves more than 92% accurately.
Effect of storage on viability of lactic acid bacteria and nutritional stability of raw Malaysian Heterotrigona itama honey
Authors: Yaacob S N S , Wahab R A , Huyop F , Ibrahim R K R , Zin N M
Published: July 2020

The nutritional benefits of stingless bee (Heterotrigona itama) honey originates from a complex of essential nutrients including carbohydrates, organic acids alongside an assortment of live lactic acid bacteria (LAB). Nonetheless, little is known about the nutritional composition over an extended storage duration. Herein, this study assessed the nutritional contents in Malaysian raw H. itama honey in response to changes in viability of LAB over 28 days of storage. LAB total count was monitored against quality parameters viz. pH, total flavonoid, total phenolic and antioxidant scavenging activity. Results revealed that LAB population was no longer detected after day 28 days of storage (p < 0.05) as compared to initial count of 2.62 × 105 CFU/g. The study recorded minor changes in pH that was reduced from pH 2.96 to pH 2.86. Notably, relatively stable (p > 0.05) total flavonoid (36-60 mg QEA/100 g) and total phenolic contents (38-62 mg GAE/100 g), with antioxidant scavenging activity (IC50 between 24-45 mg/mL) were detected for raw H. itama honey. It was irrefutably demonstrated that 28 days of storage does little to depreciate the nutritive value of Malaysian raw H. itama honey, despite the appreciable decline in live LAB counts.
Mutation identification of unreported and reported mutation profile in exon 7 of N-Acetylgalactosamine-6-Sulfates (GALNS) gene of mucopolysaccharidosis type IV A (MPS IVA) patients in Indonesia
Authors: Lestari I C , Priambodo R , Ariani Y , Hafifah C N , Abinawanto  , Sjarif D R
Published: July 2020

Mucopolysaccharidosis type IVA (MPS IVA), is an autosomal recessive genetic disorder because of N-acetylgalactosamine-6-sulfate deficiency which causes keratan sulfate and chondroitin sulfate to not degrade in lysosome. MPS IVA was caused of GALNS gene which located in chromosome 16q24.3 with the most frequent mutation occurrence in exon 7. There are no report or publication about MPS IVA or GALNS gene mutation in Indonesia, therefore this research is aimed to analyze the mutation profile in exon 7 of the GALNS gene in MPS IVA patients in Indonesia. The DNA from blood samples of four patients and three control samples from RSUPN Cipto Mangunkusumo were analyzed. Amplification by polymerase chain reaction was done after designing the primer. Furthermore, electrophoresis and sequencing analysis has been performed. The result shows that there is silent mutation c.708C>T and nonsense mutation c.751C>T. The silent mutation is categorized as a benign variant, while the nonsense mutation is categorized as a pathogenic variant because it may affect protein features and cause neuromuscular disorder. The silent and nonsense mutation that were found were already reported by Laradi and Morrone, but has not been reported in Indonesia. Further experiment was needed to find other mutation in other genes.