This research aimed to produce a study of students' mathematical concept understanding abilities in classes with Realistic Mathematics Education (RME) model learning and classes that did not receive ...RME model learning. This research was a quantitative method of quasi experiment model designed in the form of non-equivalent control group design involving two research classes determined using purposive sampling technique. The instrument used was a test of students' mathematical concept understanding ability in the form of description questions. The data analysis technique in this study used an independent sample t-test and N-gain score. The results of the analysis showed that students' mathematical concept understanding ability in the class that received RME model learning was better than that of those who did not receive RME model learning. The increase in students' mathematical concept understanding ability in the class with RME model learning was in a low category with an average gain score of 0.025. The low increase is due to the limited learning time at school during the adaptation period of new habits, so that learning with the RME model does not run effectively.
Anxiety towards a particular subject is experienced by most students in various schools, especially in mathematics. This research aims to determine the influence of self-efficacy and self-anxiety on ...mathematics in one of the schools in Cirebon City. The sample was selected using a purposive sampling technique, with a sample size of 40 students, each representing a higher grade. This study employs a quantitative approach. The data analysis techniques used are regression analysis and ANOVA test. The results of the research conclude that self-efficacy does not have a significant influence on self-anxiety in mathematics. Based on the R-Square analysis, a coefficient of determination of 0.238 is obtained, indicating that self-efficacy accounts for 28.5% of the influence on self-anxiety, while other variables influence the remaining 71.5%. Meanwhile, the ANOVA analysis shows a value of ÿ1 of 0.232. This means that each unit increase in the coefficient of self-efficacy will influence 0.232 on self-anxiety. Additionally, ÿ is equals 45.146, which means that if self-efficacy (d) is equal to 0, self-anxiety will be equal to 15.382. Therefore, it can be concluded that self-efficacy does not have a significant influence on self-anxiety in students, particularly in the subject of mathematics.
This study aims to improve learning outcomes by applying learning models to Realistic Mathematic Education on material for arithmetic operations on fractions in class V SDN 1 Karangkendal, Kapetakan ...District, Cirebon Regency. This research is a Classroom Action Research conducted in 3 cycles. The subjects of this study were 29 grade 5 students at SDN 1 Karangkendal, Kapetakan District, Cirebon Regency. Research data was collected through tests. This data analysis uses a qualitative descriptive analysis technique. The results showed increased learning outcomes in fifth-grade students at SDN 1 Karangkendal, Kapetakan District, Cirebon Regency, through a learning model, Realistic Mathematic Education. The increase in student learning outcomes is shown by the increasing number of students who meet the Minimum Mastery Criteria scores. In cycle one there were 62.1% of students achieved the Minimum Mastery Criteria scores. Then, in cycle two there were 75.9% of students had achieved the Minimum Completeness Criteria score; in cycle three, 86.2% of students had achieved the Minimum Mastery Criteria score. Based on these results, there is an increase in student learning outcomes with the application of learning models Realistic Mathematic Education on material for arithmetic operations on fractions at SDN 1 Karangkendal, Kapetakan District, Cirebon Regency.
In this article, we ask whether it is possible to reinforce problem design skills in secondary school mathematics teachers around the UN Sustainable Development Goals (SDGs), so that young students ...can try out a first numerical approach to sustainable development. If this is possible, we ask whether it would significantly improve their relationship with sustainability and their perception of the usefulness of mathematics. The present paper aims to proactively contribute to the field of civic education through the design of original math problems combining math secondary education curriculum with the predicament of the 2030 Agenda and the 17 interlinked SDGs. Conceived as a qualitative research tool for teacher training, generating adequate resources for their professional practice, five of these chosen workshop activities have been presented to a group of forty-seven students who were asked to complete a questionary afterwards about their attitude towards the proposal. The article’s main findings are that SDGs are a powerful source of inspiration for problem design grounded in real-world contexts and that students of this age are mostly ready to feel curiosity and motivation about the mathematical approach to sustainability and their capacity to analyze real data, regardless of the inevitable oversimplification of the problem.
This study was conducted to determine the opinions of middle school science and mathematics teachers about science-mathematics integration. A total of 38 teachers (19 science teachers, 19 math ...teachers) participated in this qualitative research. Data were collected using a semi-structured interview form. The data were evaluated with descriptive and content analysis in qualitative analysis. While all of the science teachers included in the study thought that integration was necessary, mathematics teachers expressed different opinions. While the teachers had different definitions of integration, it was determined that they generally exchanged ideas with the other branch teachers. It was determined that the most course needed integration for mathematics teachers was the Turkish and the mathematics for science teachers. According to teachers, the most important advantage of integration is that it increases student course success. As a result; although science and mathematics teachers have heard about the integration of science and mathematics, they do not have sufficient knowledge and application. For this reason, it is recommended that teachers of both branches should be informed about science-mathematics integration and integrate them into their lessons.
•One-year study to nutrient removal and recovery in 3 technical-scale ATSs.•Up to 84 % (50.7 mg L−1) and 99 % (9.9 mg L−1) of TN and TP were removed.•Biomass productivity of up to 10.5 g m−2 ...d−1.•Light intensity was the most effective variable for nutrients recovery.•Estimated production costs of nutrient-rich ATS biomass are 2.27 € kg−1.
In this study, three technical-scale Algal Turf Scrubber (ATS) systems were continuously operated in a greenhouse over one year to evaluate the nutrient removal and recovery ability. The independent and interdependent effects of water temperature and light intensity on dependent variables, such as nutrient removal and recovery, were identified via mathematical modelling. Over 7 days, the average total nitrogen and phosphorous removal rates and efficiencies were 30.93 and 8.95 mg/L and 51.2 and 89.5 %, respectively. Based on a statistical regression matrix, the quadratic models were chosen to analyze data on nutrient removal and recovery. In this study, light intensity was the dominant variable for ATS performance. Significant positive correlations were found between nutrient removal and recovery, and biomass productivity. The annual production costs for dried algal biomass, N and P were 2.27, 40 and 156 € kg−1, respectively. Our results indicated that the ATS technology can be efficient and cost-effective in nutrients removal and recovery from wastewaters.
Polysaccharide foulant is known to play a crucial role in membrane fouling, however the detailed influential mechanisms and the pertinence to specific structure of polysaccharides, as well as ...intermolecular interactions among them with and without divalent cation are still indistinct. In this study, seven polysaccharides including agarose, sodium alginate, carrageenan, pectin, starch, sodium carboxymethylcellulose (CMC) and xanthan gum, with different chain and molecular structures, were used as model foulants to investigate the role of structural and functional features of polysaccharides in membrane fouling. Two Hermia’s models (classical and mass-transfer models) as well as the resistance-in-series model were used to analyze the fouling mechanism. Results show that the spatial configuration of foulant molecule is significant in membrane fouling which actually controls the resistance of gel layer formed on membrane. Polysaccharides with different properties show distinct fouling mechanisms which are in accordance with the four models described by Hermia respectively. Cations may change the interaction of polysaccharide foulant which further leads to the structural change of the gel layer. It turns out that mass-transfer model is more suitable for interpreting of crossflow filtration data. So far, little has been known about the effects of molecule structure of polysaccharides on membrane fouling. In this paper, we provide a basic database for polysaccharide fouling which will work as a theoretical basis for finding more effective measures to prevent and control membrane fouling.
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•The spatial configuration of foulant molecule is significant in membrane fouling.•The resistance of gel layer is controlled by interaction of polysaccharide foulant.•Cations may change the interaction of polysaccharide foulant.•Mass-transfer model is more suitable for interpreting of crossflow filtration data.
The purpose of the research is to determine the ability of mathematical representation of students based on the level of socio mathematical norms owned by students. This research uses a descriptive ...qualitative method. The subjects were six students who had high, medium, and low sociomathematical norm categories. This study used questionnaires, written tests, and interviews as data collection instruments. Rasch model method for questionnaires and written tests as a data analysis technique and in interviews analyzed using data reduction, data collection, and conclusion drawing using MAXQDA. The results of this research are: 1). Students with high sociomathematical norm categories have high mathematical representation abilities and so do students with medium and low sociomathematical norm levels, 2) the characteristics of students' representation abilities tend to have symbolic ability indicators and 3) the characteristics of students' sociomathematical norms in this study tend to mathematical communication indicators.
This study aims to determine the application of Play Therapy using colored paper to reduce mathematical anxiety in children. The research method used is Single Subject Research with an A-B-A design. ...The subjects of this study were third-grade children of SDN 211 / IX Mendalo Darat. Determination of the subject of this study using purposive sampling technique with the criteria for children's mathematic anxiety conditions are in the very high category. The data collection instrument for this research is the mathematic anxiety scale, interview, and observation. The data analysis technique used is the visual analysis of data and graphics. The findings of this study indicate that Play Therapy using colored paper is effective in reducing children's mathematical anxiety in AA subjects, as the impact of counseling changes in the baseline phase increases during the intervention and stabilizes in the follow-up phase. It is suggested that school counselors apply Play Therapy in developing effective daily life (KES) and eliminating daily effective life (KES-T) which aims to form an independent person.
