bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Meta-Analysis of the Past Decade of Mathematics Learning Based on the Computer Algebra System (CAS)
Authors: Tamur M , Ksumah Y S , Juandi D , Kurnila V S , Jehadus E , Samura A O 
Published: May 2021

Abstract
Hundreds of studies have been found in the literature on mathematics learning supported by the use of the computer algebra system (CAS). However, there are numerous reports with mixed and even contradictory findings. This has the potential to lead to errors in concluding. This meta-analysis study was conducted to test the overall effect size (ES) of CAS-based mathematics learning. This study also aims to analyze the level of variation in individual studies and consider its implications. The ERIC, SAGE, SpringerLink, and Google Scholar databases were examined to achieve relevant research. The search results found 136 related journal articles published between 2010 and 2020. As per the study protocol, 31 articles were eligible, and 36 ES were analyzed. The calculation tool is Comprehensive Meta-Analysis (CMA) software, and the Hedges-g equation is used based on the random-effect model. The analysis results revealed that overall the use of CAS ES had a large positive impact on students’ mathematical abilities (ES = 0.89; standard error 0.08). Moderator analysis shows that CAS’s use is more effective, considering the difference in education level and CAS type. The research implications are discussed and provide important information as a fundamental idea for further meta-analysis studies on CAS’s effects.
Students’ attitude towards the implementation of six-questions cognitive model on fraction
Authors: Zhou Y , Wijaya T T 
Published: May 2021

Abstract
This study aims to analyze students’ attitudes towards the implementation of the six-questions cognitive model in teaching fractions. Samples in this study were taken in elementary school, Cianjur, Indonesia. The method of this study is a quantitative method by giving questionnaires to 44 elementary school students. The questionnaire amounts to 15 items about the six-questions cognitive model in teaching fractions. Data questionnaire was analyzed using Microsoft excel and SPSS 19.00. the study showed that percentage Students’ attitude towards implementing the six-questions cognitive model in teaching fractions was 78.03%. This proved that most of the students have a positive attitude towards implementing the six-questions cognitive model on fractions. The results of attitude data analysis also showed that the average student attitude was 3.12 larger than 2.5. This proves that students prefer the teacher to use the six-questions cognitive model on fractions than the traditional method. In further research, the six-questions cognitive model can be used on other mathematical topics.
The analysis of students’ mathematical understanding ability in solving two-variables linear equation Ssystem during the Covid-19 pandemic
Authors: Syati L M I A , Priatna N 
Published: May 2021

Abstract
This research aims to determine the mathematical understanding ability of junior high school students about the Two-Variable Linear Equation System (SPLDV) during the Covid-19 pandemic. This research is a qualitative descriptive study. Subjects in analyzing the mathematical understanding ability of junior high school students were grade IX students. The research was conducted at the beginning of the odd semester of the 2020/2021 school year in Bandung. The instrument in this study was a written test consisting of 4 essay questions that were given online via a google form. Each question represents indicators to be measured. The indicators measured are defining a concept, indicator of identifying and making example and non-example, indicator of using, utilizing, and choosing appropriate procedure and indicator of applying concept or algorithm toward problem-solving. Based on the research conducted, it was found that the level of students’ mathematical understanding ability for each indicator could be achieved well. However, especially for an indicator of applying concept or algorithm toward problem-solving, students have not been able to interpret the problem.
Ethnomathematics exploration of the rattan handicrafts that can be applied in mathematics learning in secondary schools
Authors: Prastika C , Anwar  , Abidin Z 
Published: May 2021

AbstractResearch on cultural values in mathematics learning is not widely available by researchers. Mathematical elements contained in culture need to be discussed further so that they can facilitate contextual mathematics learning. To realize this learning, it is necessary to first identify by exploring local cultural relics that express their relationship with mathematical concepts. The researcher tries to find the mathematical elements contained in the rattan handicraft products of the Lhoknga community. The researcher then describes and analyzes the mathematical elements to be used in understanding the appropriate geometric concepts. The research employed an exploratory descriptive qualitative approach. The research subject was a rattan craftsman from the Lhoknga community, in Indonesia, obtained by purposive sampling. Research data were obtained through semi-structured interviews conducted by researchers. Data collection uses a video recorder, and then data is documented for analysis using the Spradley model. The results showed that the rattan handicraft products produced by the Lhoknga community were food serving cover, pumpkins(boh labu), onion basket, parcel basket, and fruit basket. Geometry concepts contained in all of these products are lines and angles, circles, transformations, and curved side geometry. This study could also be developed on other mathematical materials.
A meta-analysis study of the effect of Problem-Based Learning model on students’ mathematical problem solving skills
Authors: Musna R R , Juandi D , Jupri A 
Published: May 2021

Abstract
This study aims at analysing the effectiveness of Problem-Based Learning (PBL) on students’ mathematical problem-solving skills. The Effect Size in some research which applied PBL was examined using the meta-analysis technique. Empirical data were obtained using electronic search engines, including Google Scholar, Portal Garuda, ERIC, SPRINGER, and national journals URL; coding was used as the instrument. Data analysis was conducted using the meta-analysis software, namely Comprehensive V.03. The method included systematic reviews on research findings in Indonesia’s national e-journals, with 16 articles meeting the inclusion criteria selected as the sample. The publication bias test was carried out so that 13 articles were obtained which would be analysed further. The meta-analysis study reveals that the overall effect of implementing PBL on students’ mathematical problem-solving skills had a high category of effect. Moreover, the effect size of the application of the PBL model on solving ability between study groups was not different based on the characteristics of the level of education, class, sample size, and study year. The results of other studies, it was found that there was a significant difference in the effect size between study groups based on the duration of learning.
Misconceptions of basic algebra on linear equation in one variable material
Authors: Yansa H , Retnawati H , Janna M 
Published: May 2021

Abstract
This research was conducted to identify students’ misconceptions of algebraic concepts. The researcher implemented a qualitative method with phenomenological design. The data were collected by conducting a test and an interview. Thirty students at the seventh grade were given a test, and six students were chosen to be interviewed. The subjects were selected by applying a purposive sampling technique. The research results indicated that the students have several misconceptions of basic algebra, such as on the degrees of the equation, variables, coefficients, and constants. Besides, students have difficulties identifying some variables in a function which resulted in errors in identifying the general form of linear equation in one variable. In other words, the students have not reached the algebraic thinking level yet. One of the factors which cause misconception is students’ understanding of the basic concepts presented in the textbook, and the information delivered by the teacher was understood partially. As a result, the implications of this study are the students need special assistance. At the same time, innovative teaching strategies must be implemented by the teacher in teaching linear equation in one variable.
Formulation and evaluation of the Exopolysaccharide compound extract lotion from the Microalgae Spirulina sp
Authors: Winahyu D A , Primadiamanti A 
Published: May 2021

Abstract
Spirulina sp. is a type of microalgae containing exopolysaccharide compound composition. Exopolysaccharide compounds are biopolymers that have very wide applications, including as antioxidants. Antioxidant compounds have the potential to be developed as additives in cosmetics. Antioxidant compounds are useful for warding off free radicals from UV rays. This study aims to make a lotion formulation of exopolysaccharide compounds from microalgae Spirulina sp. This research was conducted by extracting exopolysaccharide compounds from Spirulina sp. using 96% ethanol. The lotion formulations were made with various concentrations of 0.5%, 1% and 1.5% exopolysaccharide compounds. The exopolysaccharide compound lotion then tested the lotion evaluation including organoleptic test, pH, homogeneity, dispersion, and irritation test. Organoleptic test results showed a white lotion, odorless, soft texture. The pH value of the exopolysaccharide compound lotion ranges from 5.75 to 6.15. Homogeneity shows no solid particles and meets the conditions. The spreadability of the lotion is between 5.8-6.0. The results of the irritation test using test animals showed a primary irritation index of 0, so it did not cause irritation. Based on the research results, it can be concluded that the exopolysaccharide compound extract from the microalgae Spirulina sp. can be made into a good and stable lotion formula.
Effect of Phosphate species on biomass carbonization
Authors: Rahmawati W R , Rohaeti E , Abidin Z , Trivadila  
Published: May 2021

Abstract
Dye waste produced from industry causes environmental damage and harmful to living organism, so it is necessary to find a solution to reduce this problems. The dyes that are often used in industry are methylene blue and methyl orange. Methylene blue and methyl orange can be removed from the environment through the adsorption process. Adsorption process using activated carbon is an easy, effective, and efficient way to treat dye waste. Palm kernel shell as agricultural waste can be used as a raw material in preparing an activated carbon. This method used chemical activation to produce activated carbon. Some sample of palm kernel shell was mixed with different phosphate species, such as (NH4)H2PO4, (NH4)2HPO4, and H3PO4 with various concentration (1%, 5%, 10%, and 15%). The different phosphate species producing different yields because it has different roles in the carbonization process. Palm kernel shell is added with activating agent with a ratio 1:1 (w/v). Sample was put in a furnace at 600 °C for 1 hour. The sample was washed with distilled water until neutral pH, then dried in an oven at 105 °C for 1 hour. The phosphate acid is able to inhibit the combustion process and increase the yield. The highest yield was produced by the addition of H3PO4. The adsorption isotherm of the activated carbon follows the Langmuir isotherm.
Identification of Indonesian clickbait news headlines with long short-term memory recurrent neural network algorithm
Authors: Siregar B , Habibie I , Nababan E B , Fahmi  
Published: May 2021

Abstract
Online news portals are one of the main sources of information currently most accessed by the public. With the number of Internet users increasing day by day, online news portal business entrepreneurs must find ways to remain able to compete to attract netizens’ attention to open their news portals. One of the techniques used is to implement clickbait to increase visitor traffic or pageviews. The characteristic of clickbait headlines is that they hide the facts or actual news content in the title section. Clickbait’s goal is to get curious Internet users to click on the link with the headline. This research aims to detect Indonesian-language clickbait headlines automatically by utilizing Indonesian language news headline data obtained from several online news portals with the highest amount of traffic on the Internet. This research uses the Recurrent Neural Network method based on Long Short-Term Memory. The model is built using word embedding to represent text data into vector data. The result of this research is a model with a testing accuracy of 83% and a system that is able to classify headlines whether they are clickbait or not.
Security and privacy awareness of smartphone users in Indonesia
Authors: Amin M , Tasmil  , Herman  , Bahrawi  , Alam N , Dhahir D F , Hadiyat Y D 
Published: May 2021

Abstract
The number of smartphone users in Indonesia is increasing every year and has been growing rapidly since Covid-19 hit Indonesia. Smartphones store a lot of personal and information data, such as photos, videos, contact lists, e-mails to social media accounts. A large amount of personal data on smartphones causes an increasing number of threats to information security and privacy. This study aims to measure the knowledge and level of awareness of smartphone users in Indonesia on information security and privacy. This study modify the existing measurement methods. The results showed that there are still many Indonesians do not know the information security and privacy on their smartphones. The results also show that the level of information security awareness among Indonesians is still low.
Seawater intrusion analysis in the coastal region of Banda Aceh by using Geographic Information System (GIS)
Authors: Tanjung M , Syahreza S , Rusdi M , Yusibani E 
Published: May 2021

Abstract
Seawater intrusion is an environmental problem in many coastal regions which can harm the sustainability of groundwater resources in the future. Banda Aceh as the capital city of Aceh Province has a wide coastal region. The societies are mainly dependent on freshwater. Spatial Distribution of seawater intrusion has been studied using Geographic Information System (GIS) technique. In this research, 57 samples of groundwater were collected from 9 sub-districts of Banda Aceh. A portable Global Positioning System (GPS) was used to collect the coordinates of each sample site. This research aimed to analyse and generate the spatial distribution of seawater intrusion in Banda Aceh coastal region from the measurement of groundwater Electrical Conductivity (EC) and Total Dissolved Solids (TDS) values in the fields. The EC and TDS were used as indicators to assess the potential of seawater intrusion in the coastal aquifers. The results indicated that spatial distribution of seawater intrusion scattered in northern part of Banda Aceh. However, the analysis and measurements showed that the extent of EC and TDS values varied prominently across these sites, with the maximum EC value of 6.270 μS cm-1 and TDS value of 4.420 mg l-1 found at Neusu Aceh Village in Baiturrahman sub-district. Moreover, the minimum EC and TDS values of 217 μS cm-1 and 100 mg l-1, respectively, found at Mulia Village in Kuta Alam sub-district.
Assessing the problem-solving skills among foundation level students: A STEM case study
Authors: Maegala N M , Nor Suhaila Y , Hasdianty A , Marini I , Hazeeq Hazwan A 
Published: May 2021

Abstract
The level of unemployment among fresh graduates in Malaysia is worrying with one in five graduates still jobless after six months of graduation. One of the reasons for this scenario as claimed by employers is the poor quality of graduates with regards to attitude and skills. STEM (Science, Technology, Engineering and Mathematics) education could help students by developing their problem-solving skills. The STEM module will encourage critical thinking skills, which is essential in troubleshooting a complicated scenario. This case study assessed the initial level of this vital skill at the beginning of the university study pipeline: the foundation-level. Four groups of students from different foundation programs in Universiti Selangor were selected for the assessment. It was revealed that 70 % students had the drive to work smartly until the problems were resolved. The rest of the students (30 %) responded that they will seek external sources to solve the problem if the problems were challenging to them. It was fascinating to note that 100 % students were committed to not quit until the problem was sorted out based on their responses. Completing STEM activities therefore, had enhanced the students’ creativity, increased their confidence level and improved their team work.
Development and Validation of Grade 10 Physics Test in K-12 Science Curriculum
Authors: Jalon J B , Mistades V M 
Published: May 2021

Abstract
The purpose of this study was to develop and validate a Physics test that measures the competency level of Grade 10 students in the new Philippine K-12 Science Curriculum. The test was composed of items in electromagnetic spectrum, light, and electricity and magnetism. During the test development, the test was divided into 2 sets and underwent content and face validation from 6 Physics content-experts. It was determined that for both sets, at 95% confidence, the levels of reliability ranged from moderate to good. After revising the items based on the feedback from the experts, Set A and Set B were administered to 569 students and 526 students, respectively, and 520 responses from each set were included in the item analysis. Using the IRT, items that violated the unidimensionality IRT assumptions were removed and item characteristics were computed for item selection. The data generated were most fit in unidimensional 2-PLM with acceptable marginal reliability response pattern scores of 0.70 and 0.67 for Set A and Set B, respectively. The final form of the test contains 35 items covering all the competencies in said topics with medium to hard difficulty level and high discrimination index. The distribution of the items for the final Physics test form is balanced; 50% measures low order thinking skills and the other 50% measures higher order thinking skills. The results also showed that item parameters estimated using IRT were invariant. Based on the hard difficulty level of the test sets and average scores, the students performed fairly-well.
Impact of multi-representation-based video on students’ learning outcome
Authors: Halim A , Husna N , Samsul  , Evendi  , Nurulwati  , Mahzum E , Irwandi I 
Published: May 2021

AbstractThis study aims to determine the effect of using multi-representation based video media on high school students’ learning outcomes. The study used a quantitative approach with a quasi-experimental design. The research sample was 24 students of class X IPA-1 for the control group and 22 students of class X IPA-2 for the experimental group. In the experimental group, the multi-representation based video media were used during instruction, meanwhile in the control group the instruction did not involve any multi-representation based video media. The data were collected from students’ responses on a test for student learning outcomes and the data were analysed using the t-test. Based on the results of the analysis, it is known that student-learning outcomes have increased with the average post-test score of the experimental class 82.73 and the average value obtained in the control class post-test activity is 75.91. Based on the results of hypothesis testing at the significant level ofα= 0.05 and df = 44, the t-table = 1.68 and the t-count = 3.32. Thus, it can be said that there is an influence from the use of multi-representation based video media on student learning outcomes on the concept of Works and Energy.
The perception of pre-university students on STEM
Authors: Nawawi N M , Sout N M , Hassan K B , Samah N N A , Kamaruddin H H , Khalid R M , Azman H H 
Published: May 2021

Abstract
STEM is an integrated teaching and learning approach in Science, Technology, Engineering and Mathematic. The decreasing enrolment of students in STEM-field is alarming and impacting the industry as well as the university students’ intake. This study is focusing on one hundred of pre-university (foundation) students by looking at their understanding on STEM education and the impacts of STEM module in nurturing their interest on STEM. The study applied naturalistic inquiry to assess their perceptions of STEM prior and subsequently after involve in a STEM module activities. The results showed that majority of students are female and from different background, they are interested in learning science shown by the increase of agreement to 38% and 40% after the activity with the decrease in the percentage of neutral and disagree level. The percentage of interest on STEM was decreased after the activity. However, the level of confident about their ability towards science was increased. The confident level lead the respondents to choose career related to science/STEM based on the increase level of agreement from 22% to 28% and from 24% to 32% for strongly agree and agree relatively. Hence, the outreach with attractive activities would potentially add value for students’ intrinsic motivation for science and science learning.
The impact of implementation of STEM integrating project-based learning on students’ problem-solving abilities
Authors: Nurmaliah C , Azmi TN , Safrida  , Khairil  , Artika W 
Published: May 2021

Abstract
Problem solving is one of the higher thinking skills required and must be built by students. This study aims to examine the ability of students to solve problems through the implementation of the STEM approach integrating PjBL model on the Immune system. This study was carried out at senior high school in Banda Aceh and Aceh Besar district. This study was an experimental pretest design with a non-randomized control group. The population was all 11th-grade students from both schools. Thus, the Science Class 1 and 3 (of SMAN 5 Banda Aceh) and the science class 1 and 4 (of SMAN 1 Darul Imarah) were selected as the sample. The test attached in the student working sheets, which was constructed using an Engineering Design loop, is the instrument used to assess the problem-solving capacity. The data from the study have been processed and descriptively analyzed. The results showed that the STEM approach integrating PjBL model could improve the abilities of students to solve problems. Therefore, the implementation of STEM approach combined with PjBL can be used as a strategy for teachers to carry out learning activities to enhance the meaningful learning and student’s capability in solving problem of biology content.