bluuebunny/crossref_metadata_2025_split huggingface dataset:
The development of a learning media using motion paths in the circle learning material
Authors: Murniasih T R , Suwanti V , Hima L R , Palayukan H , Sirajuddin  
Published: May 2021

Abstract
Motion paths animation in Microsoft PowerPoint has the function of giving animation effects to objects so that the objects move based on the paths that are previously made. This study aims to describe the steps in developing a learning media using motion path animation in the circle learning material. The media development used the ADDIE model, which consisted of five stages: analysis, design, Development, Implementation, and Evaluation. Media validation was carried out by media experts and learning experts. The small group trial was conducted on two students, while the large group trial was conducted on 20 students at a private junior high school in Pasuruan. Based on instrument validation results by learning experts and media experts, the average score was 4.15 (a very valid category). Based on the small group trial and the large group trial, the result was 3.6 and 3.77. The results show that the learning media using motion path animation on circle material is worthy for use in learning.
Didactical design for distance concept in solid geometry to develop mathematical representation ability in vocational high school
Authors: Rahayu E G S , Juandi D , Jupri A 
Published: May 2021

Abstract
This is qualitative research about the didactical design of distance concept in solid geometry, aiming to develop mathematical representation ability. This research employs a qualitative method with didactical design research (DDR) consisting of three stages of the didactical situation: didactical and pedagogical anticipation, metapedadidactical analysis, and retrospective analysis. Hypothetical didactical design was arranged by learning obstacle and hypothetical learning trajectory with the theory of didactical situations. The research subjects were three students of State Vocational High School in Garut as representatives of 30 students who had experience learning Distance Concepts in Solid Geometry and had been given an identification test for learning obstacles. The study identified that learning obstacles are the didactic and epistemological obstacle, which covered five inaccuracies in (1) Students’ ability in presenting concepts in various mathematical representation; (2) Understanding of the concept orthogonal projection between points on a line in the geometry; (3) construct geometric shapes of space to clarify the problem; (4) Understanding students’ visual representations related to the ability to determine the position of a point or a line perpendicular to a line; (5) Understanding of calculation procedures using the Pythagorean theorem and algebraic concepts.
Students’ understanding of mathematical concepts and their self-confidence through a discovery learning model
Authors: Maifi Y K , Anwar  , Ahmad A 
Published: May 2021

Abstract
This study aims to describe students’ understanding of mathematical concepts and self-confidence after implementing the discovery learning model. This study used a qualitative approach with a descriptive type. The participants were four seventh-grade students in one of the junior high schools in Meukek, South Aceh. The instruments used in this study were conceptual understanding tests and a self-confidence questionnaire. Data analysis involved data reduction, data presentation, and drawing conclusions. The results revealed that students’ understanding of mathematical concepts and self-confidence became better after implementing the discovery learning model. The student who initially possessed a low understanding of mathematical concepts had the medium category after learning with the discovery learning model. Out of six indicators of understanding mathematical concepts, four indicators had been fulfilled by students. However, students were still deficient in the indicators of presenting concepts in various representations and linking various mathematical concepts internally or externally. With respect to self-confidence, the findings showed that students met the indicators of act independently in making decisions, good self-concepts, and dare to express opinions, but they still lacked the indicator of believing in their abilities.
A meta-analysis of the last decade STEM implementation: what to learn and where to go
Authors: Tamur M , Fedi S , Sennen E , Marzuki  , Nurjaman A , Ndiung S 
Published: May 2021

Abstract
Comprehensive reviews of STEM (Science, Technology, Engineering, Mathematics) have not been explored much, causing many teachers not to realise the benefits of this approach for students. For that purpose, this meta-analysis study was conducted to understand the overall effect of STEM better. Empirical data were obtained from the ERIC, SAGE, SpringerLink, and Google Scholar databases. The search results found 89 articles published between 2010 and 2020. According to the inclusion criteria, 13 items were eligible for analysis. The analysis tool uses Comprehensive Meta-Analysis (CMA) software, and random effects models are estimated. The results revealed that the overall effect size of the study was 0.73 (standard error 0.14). These results indicate that the application of STEM has a moderate effect on students’ academic abilities. The analysis of the mediator variables reveals that STEM implementation is effective by considering the level of education and sample size. The study’s limitations and implications are discussed to provide vital information for performance and future STEM research.
Self-regulated learning through Contextual Teaching and Learning (CTL) approach
Authors: Merawan C T , Hajidin  , Duskri M 
Published: May 2021

Abstract
Self-regulated learning is essential and must be a concern for teachers in the learning process. Self-regulated learning is one of the affective aspects that play a vital role in achieving mathematics learning outcomes. Students’ self-regulated learning is generally still relatively low. This study aims to determine students’ self-regulated learning through the Contextual Teaching and Learning (CTL) approach. The research sample was eighth-grade students in one of the junior high schools in Banda Aceh. The research instrument was a students’ self-regulated learning questionnaire. Data were analyzed using descriptive statistics. The results showed that most students (55%) had good self-regulated learning after learning with the CTL approach. Besides, 42% of students had sufficient category, and only 3% were in a low category. Overall, students gave a positive response to learning with the CTL approach.
Morphological characterization of some Coffea arabica L. varieties in Gayo Experimental Garden Bener Meriah
Authors: Shara P N , Thomy Z , Anhar A , Harnelly E , Ramlan R R 
Published: May 2021

Abstract
The research on the morphological characterization of arabica coffee varieties (Coffea arabica L.), has been carried out from June 2019 to October 2020 at the Gayo Experimental Garden (KP), Pondok Gajah, Bener Meriah Regency. The purpose of this study is to determine the morphological characterization of arabica coffee varieties (Gayo 1, 2, Ateng Super, C 47, and P 88). This research used a survey method, with purposive sampling by collecting 8 year old arabica coffee plants with a height of 1400-1425 meters above sea level, and each variety was obtained from different garden. To determine the characteristics of Arabica coffee varieties, identification and measurement were carried out. The results showed that there were several differences in the varieties of Gayo 1, 2, Ateng Super, P 88, and C 47. They have different stem diameters with the same height and taproot. Gayo 1, 2, Ateng Super, and P 88 have the same leaf size, while that of C 47 was smaller. The Gayo 1, 2, and Ateng Super have the same flower size, P 88 has larger, and that of C 47 was smaller than the coffee in general. Gayo 1, 2 have standard fruit sizes, while Ateng Super and P 88 has larger, and that of C 47 was smaller than the coffee in general. Gayo 1, 2, Ateng Super, and P 88 have standard bean sizes, while that of C 47 was smaller than the coffee in general.
The Development of natural science module web integrated with local plants toward cooperation skills and environmental care attitude of students
Authors: Devitasari P I , Wilujeng I , Azhary S A , Sadewo M A I 
Published: May 2021

Abstract
The research is about to develop a valid natural science module web integrated local plants on cooperation skills and environmental care attitudes. The research method used is Research and Development which is limited to the developing stage. The research sample was 16 students of 8th grade of Junior High School. The instruments in this study were expert validation sheets, science teacher assessment sheets, peer assessment sheets and students’ readability sheets using a questionnaire with Likert scale. Validation data were analyzed using descriptive analysis. The results of the assessment by experts with the score is 3.6, from science teacher with the score is 3.5, peers review with the score are 3.7, 3.7 and 3.4 and the readability level of students 3.7. All scores are in the excellent category. It can be concluded that the web natural science module can be used in learning. This research is important because it utilizes technology and is integrated with the environment.
Non-invasive measurement of cortisol metabolites in feces as an indicator of stress and its relationship with the number and arrival frequency of visitors in captive sambar deer (Cervus unicolor)
Authors: Gholib G , Jannah P T M , Wahyuni S , Rahmi E , Hanafiah M , Adam M 
Published: May 2021

AbstractNowadays, the non-invasive measurement of cortisol in feces is a popular method used as an indicator of stress in wild and captive animals. This study was conducted to examine the feasibility of a non-invasive method for cortisol metabolites measurements in feces and investigate its relationship with the number and arrival frequency of visitors in captive Sambar deer. In total 64 fecal samples were collected together with the observation of the number and arrival frequency of visitors from 7 Sambar deers (3 adult males, 4 adult females) rearing in zoos of Taman Rusa Lamtanjong, Aceh Besar, Indonesia. Subsequently, fecal samples were extracted and the concentration of cortisol was measured by using 3α, 11β-dihydroxy-etiocholanolone assay. Data were analyzed using a t-test and Pearson correlation. Results showed that cortisol metabolites concentration in adult males of Sambar deer (276.20 ± 52.74 ng/g dry feces) was higher compared to adult females (181.56 ± 25.87 ng/g dry feces). The concentration of cortisol metabolites was significantly correlated with the number of visitors ( r = 0.482, p < 0.05 ) and the arrival frequency of visitors ( r = 0.398, p < 0.05 ) in which the higher number and arrival frequency of visitors increased the cortisol metabolites concentration. In conclusion, the concentration of cortisol metabolites in Sambar deer can be measured non-invasively from feces and associated with the number and arrival frequency of visitors.
Agaricales: the most dominated macroscopic fungi in Tahura Pocut Meurah Intan Forest Park
Authors: Kusuma H I , Harnelly E , Thomy Z 
Published: May 2021

Abstract
Agaricales is a group of fungi from the Basidiomycota division which is widely known by the public because it easily grows on various substrates and is widely distributed, especially in the tropics. Most members of this order have an important role in the environment as well as a great economic value. However, research on the Agaricales fungi diversity in Aceh is still rare, especially in Pocut Meurah Intan Forest Park (Tahura PMI). This research contributes to the knowledge about this fungi biodiversity found in Aceh and mainly the PMI Tahura. The aim of this research was to record the diversity of the order Agaricales in the Tahura PMI area. Samples were collected through exploration along the track and identification was carried out based on the morphological and ecological characters. The results obtained showed that 50 species from the order Agaricales were included in 16 families out of 30 genera which were dominated by the Marasmiaceae family and the Marasmius genus. Nine samples were known to have the potential of being used as food, while 6 of them as medicines. This research shows that the Tahura PMI area has a high diversity of Agaricales with potentials that can be utilized for the benefit of mankind in the future.
Statistical optimization of pigment extraction from Acutodesmus reginae sp
Authors: Norazah M N , Asyiqin B N , Suhaiza J , Roshani O , Azmahera G N , Suhaila Y N , Azlin M N 
Published: May 2021

Abstract
Pigment is a natural colorant produced by an organism including microalgae. A locally isolated microalgae, Acutodesmus reginae has shown potential in producing pigments. The intent of this study was to optimize the pigment yield from the unexplored Acutodesmus reginae. Various statistical software for experimental design as tools for optimization offers researcher to plan and able to determine cause and effect relationships in experiment widely applied nowdays. In this study, a 3-level factorial design in response surface method (RSM) used to analyse the effect of factors (type of solvent, extraction time) to determine the optimal parameters for chlorophyll a, chlorophyll b, carotene and phycocyanin pigment extraction yield. A total of 13 run were done using the combination of 95% ethanol, methanol and diethyl ether as the solvents at different extraction time, 15, 30 and 45 minutes. The used of RSM resulted in maximizing the yield of chlorophyll a, chlorophyll b, carotene and phycocyanin at 0.92 μg/mL, 0.64 μg/mL, 0.27 μg/mL and 1.70 μg/mL respectively using 95% ethanol within 45 minutes of homogenization with bead milling assisted. Pigments extraction was done under optimal conditions as predicted by RSM with desirability 0.730 for authentication of the pigment extraction observed. Analysis of the results indicates the experimental values acquired appropriate as the data estimated by the model indicating that the process optimization is reliable to predict the parameter for pigments extraction from Acutodesmus reginae.
How Sharing and Jumping Task affect to student interaction in chemistry learning
Authors: Fibrianto S , Hendayana S , Supriatna A , Oktasari C 
Published: May 2021

Abstract
This research is a qualitative descriptive study which aims to see the effect of sharing learning and jumping tasks on student interactions in the chemistry learning process at high school (SMA) in Subang district. This article will explain how interactions occur between students and teacher interactions with students in group discussions during the chemistry learning process. This research method is Didactical Design Research (DDR). Data collection using observation and recording (video and voice). Learning uses sharing and jumping tasks which are divided into three learning activities, namely opening activities, core activities (sharing and jumping) and closing activities. The results of the study were then transcribed and analyzed using the Transcript Base Lesson Analysis (TBLA) technique, showing that there was student interaction in the form of conversations between students and teachers in groups during the learning process but with different amounts in each learning activity. Most interactions are found in sharing activities, then in jumping task activities, opening activities and interactions at least occur in closing activities. Interaction is in the form of a conversation containing questions and answers between students, student presentations and sharing knowledge among students in groups. This shows that learning sharing and jumping tasks is able to foster good student interaction in learning.
FTIR (Fourier Transform Infra Red) profile of banana corm flour, nutritional value and sensory properties of resulting brownies
Authors: Saragih B , Saragih NAD 
Published: May 2021

Abstract
There is a need for continuous development in the aspect of local food resource utility, especially for rarely used foodstuffs. These include banana corm, with a propensity for processing into flour. The objectives of this study, therefore, were to determine the FTIR profile of banana corm flour and effect of steamed brownies formulated from banana corm and wheat flour, based on the nutritional and sensory properties. Furthermore, Completely Randomized Design with five treatments were adopted during the experiment, including the comparison of banana corm flour:wheat flour at ratio (50:50), (60:40), (70:30), (80:20) and (90:10)%. These individual treatments were replicated three times, and the data obtained were analyzed with ANOVA. Subsequently, samples with significant effect were further evaluated with the Least Significant Difference test at α = 0.05. The FTIR results showed a chemical profile containing phenols, alkanes, alkenes and nitro compounds in banana corm flour, while wheat in contrast showed significantly different moisture, ash, fat, protein, carbohydrate, fiber content, and energy. In addition, the sensory test results indicate the ratio (90:10)% as the panelist’s favored steamed brownies.
Adsorption and decomposition of cationic dye by using goethite-polyacrylate composite
Authors: Kharisma D , Abidin Z , Kusmana C , Suhardiyanto H 
Published: May 2021

Abstract
The adsorption of cationic dye has been widely carried out by using polyacrylate, but it has a low ability to degrade the dye. On other hand, goethite has the opposite properties. This study aims to synthesis the composite of goethite-polyacrylate and its application for adsorption and degradation of methylene blue dye. The composite was synthesized by aging goethite at 40 °C for 7 days, polyacrylate then was added to goethite and the aging process was continued until 21 days. The synthesized composite was characterized by using Fourier Transform Infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The result indicated that the composite has better adsorption capacity compared to goethite with the uptake of adsorbed methylene blue is 625 mg/g. The equilibrium data fit the Langmuir isotherm model correlation efficient higher than 0.99. Goethite-polyacrylate composite efficiently degraded the methylene blue compared to polyacrylate. The combination of goethite and polyacrylate improved the properties of the material which has good adsorption and degradation performance.
User interface evaluation of a real-time gimmick tracking
Authors: Nurwulan N R , Zahirah K F 
Published: May 2021

Abstract
This paper presents the usability evaluation of a gimmick tracking application designed by students in the Human-Computer Interaction class to solve the problem in one of the biggest food companies in Indonesia. Gimmick tracking is important for the company to make sure the gimmick can be transferred to the customers with minimum-to-none problems. The gimmick tracking application should be user-friendly for the users to make sure the application meets the purpose of its development. Quantitative and qualitative usability evaluation using the system usability scale (SUS) questionnaire and think-aloud method were used to evaluate how effective is the real-time gimmick tracking application. A total of 12 subjects with an age range from 18 to 27 from the grocery stores in Malang were recruited to participate in this study. The SUS questionnaire was used to measure the hypotheses related to learnability, efficiency, memorability, errors, user satisfaction, and usability. The qualitative data such as recorded videos and notes were transcribed into the text for further analysis. The SUS score of the design of the gimmick tracking application was 70.83, this score is higher than 55 percent of other applications. Thus, it can be concluded that our design generally has fulfilled all usability requirements.
Development of a person’s facial expression recognition system using a convolutional neural network
Authors: Siregar B , Wirtjes J S , Nababan E B , Fahmi  
Published: May 2021

Abstract
Humans naturally and intuitively use important and powerful facial expressions to communicate and show their emotions during social interactions. In that interaction, the effort to interpret someone’s emotional condition is important in good communication. A person’s emotional condition is reflected in the form of words, gestures, and especially facial expressions. Although humans can recognize expressions well, research on expression recognition carried out by machines is continuously being carried out in order to be able to carry out expression recognition in human and computer interactions. This research conducted facial expression recognition using the Convolutional Neural Network method. To perform facial expression recognition, the Convolutional Neural Network is trained with expression image data. The training process is carried out using different optimizer values, batch size, and epoch to get the best model. To overcome overfitting, data augmentation was carried out on training data and validation data. The experimental results in this research indicate that the system method built is able to recognize a person’s facial expressions with an accuracy rate of 80%.
Development of Aceh biodiversity information system
Authors: Subianto M , Afidh R P F , Harnelly E 
Published: May 2021

Abstract
Aceh is rich in biodiversity, both flora, and fauna. Aceh’s biodiversity has not been well documented. This can be seen from the absence of an information system that is open to the public regarding biodiversity in Aceh. This study aims to develop a web-based Aceh Biodiversity Information System of Aceh Biodiversity. This Aceh Biodiversity Information System will collect data on biodiversity in Aceh from various parties, including researchers, academics, government, and the general public. The waterfall model as the Software Development Life Cycle (SDLC) model is used in the development of this information system. The System Usability Scale (SUS) is used to determine user opinions in using this information system as input for improvement. The results showed that this information system was good enough to accommodate the data collection process from various parties. Improvements to the existing features used in this information system need to be done. It is hoped that these Aceh Biodiversity Information System can be utilized as a data collector for the education, research, management, conservation, and other fields of a task, especially bioinformatics.
A review of mathematical modelling in educational research in Indonesia
Authors: Vitoria L , Ramli Marwan , Johar R , Mawarpury M 
Published: May 2021

Abstract
Mathematical models are mathematical representations of real-life problems which are used to simplify the problems and also for future prediction. Mathematical modelling has been used in educational research around the world mainly to predict students’ academic performance and to identify essential factors that affect students’ learning. However, in Indonesia there are very few published researches that employ mathematical modelling for educational studies. The present study is an integrative review conducted to document these studies. The objective is to provide an overview of the usage of mathematical modelling in educational research in Indonesia. The method of the review follows Torraco’s guidelines of integrative review which consist of critical analysis and synthesis. Five open-access published articles were discovered. These articles were written either in English or in Bahasa Indonesia. 3 out of 5 articles focused on explaining several predictor variables that influence student performance. The other 2 articles focused on comparing different methods of modelling to predict student performance. These findings show that mathematical modelling has not been extensively utilized in educational research in Indonesia.