bluuebunny/crossref_metadata_2025 huggingface dataset:
The analysis of students’ practicum skills achievement in acid-base material
Authors: Nuswowati M , Susilaningsih E , Cola N , Purwanti E
Published: June 2021

This research aims to analyze the achievement of students’ practical skills in learning chemistry on acid-base material. The subjects in this research were students of grade 11 senior high school. The research method used was an experimental design. The process of data collection was used the practical skills observation sheet. The sample was determined using cluster random sampling technique, namely XI MIPA 4 as the experimental class and XI MIPA 1 as the control class. The data analysis results showed that the average percentage of achievement of practical skills in the experimental class was 84.89%, while for the control class was 78.76%. Assessment of the achievement of students’ practicum skills includes 16 aspects that fall into three dimensions, namely preparation of practicum, implementation of practicum, and final implementation after practicum. Based on these data, it was concluded that students’ practical skills grade 11 senioh high school on acid-base material were classified as good criteria.
Development of automatic spam detection application based on modular programming
Authors: Subhan S , Arifudin R , Efrilianda D A , Prasetiyo B
Published: June 2021

This article discusses developing an application for automatic spam detection based on modular programming. In general website development, certain development features cannot be used on other similar websites. We use modular programming to solve this problem. The problem is how to develop an automatic spam detection application based on modular programming. We used the software prototyping method for application development. The results of this study are obtained an automatic spam detection website application based on modular programming.
A review of using data mining and machine learning for predicting drug loading modeling in solid lipid nanoparticles containing curcumin
Authors: Widyati R , Ashari A , Afiahayati
Published: June 2021

This article provides a comprehensive review of the use of data mining and machine learning to develop predictive models for drug loading in nanoparticles. Solid lipid nanoparticle technology is a promising new approach to lipophile drug delivery. Solid lipid nanoparticles (SLNs) are an important advance in this area. The bio-acceptable and biodegradable properties of SLN make it less toxic than polymer nanoparticles. This review article contains a series that applies computer-oriented processes and tools to extract information, analyze data and finally extract the correlation and meaning of the results obtained regarding solid lipid nanoparticles especially those containing curcumin. The purpose of this review is to describe the development of several research results that have been published over a period that is useful for new insights on drug loading modeling.
A comparative forecasting model of COVID-19 case in Indonesia
Authors: Septiarini T W , Taufik M R , Prasetya T A E
Published: June 2021

COVID-19 had been a disaster in Indonesia. Moreover, it is needed a study to analyze the trend of this case. The objectives of this study were (1) to propose the model for predicting COVID-19 using exponential smoothing, autoregressive integrated moving average (ARIMA), neural network, and fuzzy time series and (2) to compare the performance for each model by using RMSE as evaluation tool. In this study, the splitting data is implemented by 3:1 ratio on train and test data set. The results show that the neural network has the smallest error, 772.46 for RMSE. It means that neural network perform better than other forecasting model. Once, the characteristic data had big impact to building forecasting model whether in classical or modern model.
Development of higher mathematical thinking of senior high school students through training of open-ended problems assisted by the teacher’s scaffolding
Authors: Pujiastuti E , Mulyono  , Mashuri
Published: June 2021

This article is based on applied research that has started with preliminary research in 2019. The objectives: Obtain the results of the analysis of Open-ended Problems assisted by the teacher’s scaffolding, which can be used to develop Higher Mathematical Thinking for Senior High School students. The methods, qualitative approaches. The research subjects took 6 students of SMAN 1 Ungaran, two students from the clever, medium, and lack groups. Data analysis includes data reduction, data presentation, data interpretation, and concluding. Data obtained from test results, intensive interviews, and triangulation. The results: (1) Senior High school teachers found identification of scaffolding level to develop of Higher mathematical thinking, (2) through the practice of open-ended Problems with the help of scaffolding by the teacher, it was successfully used as a means of developing Higher Mathematical Thinking for Senior High School students. The conclusions: (1) The practice of Open-ended Problems assisted by the teacher’s scaffolding succeeded in developing Higher Mathematical Thinking for senior high school students. (2) Teachers need to be at a scaffolding level to develop Higher Mathematical Thinking, depending on intelligence level. The more intelligent, the less its guidance.
A hierarchical component model of students’ difficulties of learning mathematics in a distance higher education
Authors: Sugilar  , Rajati T , Achmad
Published: June 2021

The main purpose of the research was to explore the students’ difficulties in learning mathematics at a distance higher education. The method used was a survey of 304 students of the study program of S-1 PGSD in the Pontianak Regional office center of Universitas Terbuka (UPBJJ-UT Pontianak). The data analysis used a partial least squares structural equation model (PLS-SEM) to reveal the hierarchical component model of the students’ difficulties in learning mathematics at Universitas Terbuka. The research confirmed that the difficulties in learning mathematics were reflected by five latent variables as indicated by path coefficients and level of significance: (1) the nature of mathematics, (2) the characteristics of distance learning, (3) learning material, (4) learning support services, and (5) motivation. The recommendation was that to facilitate the students’ learning mathematics, an institution of distance higher education should be focused on resolving the difficulties perceived by the students, such as students’ mathematical background, self-directed learning skills, and skill for learning through media.
Students’ learning difficulties in integral calculus based on critical thinking skills
Authors: Susilo B E , Darhim D , Prabawanto S
Published: June 2021

This study aimed to describe students’ learning difficulties in integral calculus based on critical thinking skills. This study used descriptive exploratory methods with instruments: test, interview, documentation, and observation. Data was taken from 20 undergraduate students from the study program of mathematics education at Universitas Negeri Semarang. The results showed that: (1) there were 24 types of student difficulties identified in calculus lectures; these difficulties consist of 20 types of difficulties related to calculus material (types of difficulties number 1 to 20) and four types of difficulties that were not related to material (types of difficulties number 21 to 24), and (2) these types of difficulties were graded according to the level of student critical thinking skills. A higher level of critical thinking skills had fewer types of difficulties; on the other hand, a lower level of critical thinking skills had more types of difficulties and more fundamental. The fundamental types of difficulties based on the critical thinking skills aspect include understanding integral concepts and drawing graphics.
Augmented reality student worksheets for learning mathematics during the COVID-19 pandemic
Authors: Sholikhah B U , Cahyono A N
Published: June 2021

In the world of education there are new technologies, one of which is augmented reality. Digital component with real object can be combined, displayed interactively and real time, and it can be applied in space geometry learning. This research directs to design an augmented reality student worksheet for learning mathematics during the pandemic concerning space geometry. This research used a design research method namely the implementation and design stages. The design stage is focused in this research. Based on preliminary study at school, mathematics learning using learning media often assisted by learning management system. This application was designed by showing the user interface to make it easier, the 3D model is designed according to scientific learning for helping student to demonstrate mathematically the real problem featured. The design of problem based learning is creating some problems to encourage students to formulate a hypothesis through small group discussions to get solutions from the given problem, this model is assisted learning management system. Based on the result of the product feasibility test, augmented reality student worksheet is suitable to the use in problem based learning in school.
Mathematical concepts using Kain Cepuk Nusa Penida
Authors: Dwijayani N M
Published: June 2021

This research aims to investigate mathematical concepts using Kain Cepuk. The design of this research is exploration. This research involved grade VI students and class teachers at SDN 4 Dauh Puri. The data used in this study were collected by means of interviews, observations and questionnaires. Data about mathematical concepts on Kain Cepuk were analyzed descriptively. Students have been asked how to make repeating red, blue and white motifs like the one on the Kain Cepuk. Based on student’s responses, it can be said that the red Kain Cepuk motif has shifted three to the right by passing through the blue and white colors. Regarding the concept of reflection, students responded that there are several ways to make red, blue and white kite motifs on Kain Cepuk. The first way is to fold the Cepuk fabric upwards so that a horizontal line of symmetry is formed. The second way is to fold the Cepuk fabric to the right or left so that a vertical line of symmetry is formed. Learning using Kain Cepuk can provide benefits for students including 1) students discovering the concept of shifting and reflection by themselves, 2) reducing students’ perceptions that mathematics is only an abstract formula, and 3) fostering student confidence that mathematics is close to their lives.
Higher order thinking skills students in mathematical statistics course base on revised bloom taxonomy in factual and conceptual knowledge dimension
Authors: Rahayu A , Syah A , Najib A
Published: June 2021

The purpose of this study was to identify Higher Order Thinking Skills (HOTS) in mathematics education study program students in the Mathematical statistics course. HOTS in this study is based on the Revised Bloom Taxonomy which includes analyzing, evaluating and creating, especially in the dimensions of factual knowledge and conceptual knowledge. This research is a qualitative descriptive study. The research subjects were 35 students of the fourth semester mathematics education study program of Al Asyariah Mandar University. The data collection techniques such as essay test and each of which consisted of 3 items of dimension of procedural knowledge and conceptual knowledge, which was C4 (analyzing), C5 (evaluating), C6 (creative) level. HOTS data were obtained from test answers given to students and then analyzed descriptively. HOTS criteria include low, medium, and high. The results of the research on the factual knowledge dimension with a C4 level (analyzing) of 6.7 (medium), a C5 level (evaluating) of 4.6 (low), and a C6 level (creating) of 4.3 (low). Whereas in the conceptual knowledge dimension with a C4 level (analyzing) of 6.9 (medium), a C5 level (evaluating) of 4.7 (low), and a C6 level (creating) of 4.1 (low). In general, students’ HOTS are in low criteria.
Development of attitude assessment instrument in engineering mathematics 1 course to assess discussion on MOOC platform
Authors: Yuniwati I , Yustita A D , Hardiyanti S A , Suardinata I W
Published: June 2021

Affective assessment instruments have been developed, especially those related to attitudes. In engineering mathematics learning 1 through the MOOC platform, it was carried out with discussion. The development of attitude instrument assessment to assess student activity was carried out after learning was complete. This development research used the Plomp Model. The Plomp Model consisted of 5 stages. They were the initial investigative stages, design stage; construction stage; the test, evaluation, revision stages; and implementation stages. Two experts and trials carried out validation were carried out on 100 students. The result of developing an attitude assessment instrument was a questionnaire. The difference from other questionnaires lies in paying attention to the internal continuum interval of attitudes developed by Bloom’s Taxonomy. They were Responding, Valuing, and Organization. Afterward, The instrument is tested for reliability and validity until it is declared to validate each item and the instrument’s reliability in the excellent category. The value of Cronbach’s Alpha instrument is 0.848. The value indicates that the attitude assessment instrument is classified as having good criteria. Then the instrument is implemented in discussion on the MOOC Platform.
Mathematical creative thinking ability of students in treffinger and brain-based learning at junior high school
Authors: Wijayanti K , Khasanah A F , Rizkiana T , Mashuri  , Dewi N R , Budhiati R
Published: June 2021

The purpose of this experiment was to comprehensively examine whether innovative Brain-Based Learning and Treffinger learning was effective for developing mathematical creative thinking ability at junior high school. The research design was a quasi-experimental non-equivalent control-group design. The population was all grade VIII students at Junior High School in the 2019/2020 school year. The samples were two classes determined by a randomized class. Data collection techniques with tests. Data analysis were using the z-test and the t-test. The results of this study were the percentage of students in the class that applied the Treffinger learning achieved classical completeness and the mean of creative thinking ability of students in the class that applied the Treffinger learning was more than the mean mathematical creative thinking ability of students in the class that applied Problem-Based Learning. The percentage of students in the Brain-Based Learning class achieved classical completeness and the mean mathematical creative thinking ability of students with Brain-Based Learning was higher than the students with Problem-Based Learning. There is no significant mean difference between the students’ mathematical creative thinking ability in the class that apply Brain-Based Learning and Treffinger learning. This research concludes that innovative learning Brain-Based Learning and Treffinger learning is effective for developing mathematical creative thinking ability at junior high school.
Content validity analysis on mathematical quantitative literacy instruments in elementary schools
Authors: Anggara D S , Kadir  , Haribowo H
Published: June 2021

This research is part of the development of mathematical quantitative literacy instruments for elementary school students. In this section, the purpose of this study is to analyze the content validity of the instrument. The instruments developed were 40 multiple-choice items constructed from interpretation, representation, calculation, assumptions, analysis, and communication skills. Furthermore, the instrument was assessed qualitatively and quantitatively by 6 experts with assessment aspects including 1) relevance of items to the dimensions of quantitative literacy, 2) relevance of items to item indicators, 3) clarity of items, 4) logicalness of all answer options, 5) fairness the language used, and 6) the functioning of the case descriptions/discourses/figures/tables/graphics in the items. The collected qualitative data were analyzed qualitatively and the collected quantitative data were analyzed using the Content Validity Index (CVI). The results show that 40 items each have a CVI value of more than 0.60 with an average of 0.98, it can be concluded that the items and quantitative literacy instruments for elementary school are valid based on content.
Description of student’s difficulty in understanding online mathematics learning materials
Authors: Ishak H , Sukestiyarno YL , Waluya SB , Rochmad  , Mariani S
Published: June 2021

The Covid-19 pandemic has changed many social structures in society. This also impacts the world of education, where suddenly the learning model that is usually done in schools must be done online. This problem has an impact on student learning outcomes, especially in the field of mathematics. This study aims to examine the problems faced by students in learning during the pandemic period. This research uses descriptive qualitative methods, conducted by interviewing 15 mathematics teachers and observations made to 10 junior high school students. Based on the results of interviews with mathematics teachers, it is found that learning in online classes is very different from learning in class both in terms of student attendance, student learning outcomes, and student activities in the online learning process. Meanwhile, from the results of direct observation with students, it was found that students felt bored and did not understand the material in online classes due to a lack of time to ask questions about teaching materials and absence in online classes partly due to inadequate facilities.
Design of instrument Technological Pedagogic Content Knowledge (TPACK) for prospective mathematics teachers
Authors: Wahyuni I , Zaenuri  , Wardono  , Sukestiyarno Y L , Waluya S B , Nuriana  , Aminah N
Published: June 2021

This study aims to design a measuring tool for Technological Pedagogic Content Knowledge (TPACK), especially for prospective mathematics teachers. This research uses design research and Development (R n D) which refers to the ADDIE development model, which includes Analysis, Design, Development, and Evaluation. Based on the results of expert validation on the TPACK capability instrument, namely the TPACK ability questionnaire instrument and sheets teaching practice observations based on the TPACK aspect are included in the very valid category.
Understanding concept of students in solving derivative problems based on school origins
Authors: Mutia  , Zaenuri  , Wardono
Published: June 2021

This research is based on students’ problems in understanding the concept of derivatives in the differential calculus. Learning derivatives always become a difficulty for students, even for they are in the high school. Learning derivatives is the same as studying something abstract, therefore, if students do not understand the concept well, they will continue to experience learning difficulties when solving the problems. However, conceptual understanding is a basic ability that students must have in order to be able to learn and to solve these mathematics problems. This research was conducted to describe the understanding of the students’ concept in solving derivative problems in the differential calculus topic in terms of their school origins. This research is a qualitative descriptive. The subjects of this study were the fourth semester students in Mathematics Education Program of State Islamic Institute of Curup Academic year 2019/2020 selected by purposive sampling based on school origins. The data collection techniques used were tests and interviews. Furthermore, the data is analysed by reducing data, presenting data, and drawing conclusions. The results showed that based on the school origins, the students have concepts understanding in solving derivative problems, but it had various thinking. It can be seen from the concepts of students in a variety representation. In solving derivative problems, there were still found variety of conceptual understanding and concept errors such as factoring of quadratic equations and grouping the terms in solving derivative algebraic functions.
The differences in mathematics learning outcomes of elementary school teacher education UNNES students in terms of gender and specialization of majors in senior high school
Authors: Nugraheni N , Zaenuri  , Wardono
Published: June 2021

The purpose of this research was 1) to determine the differences in the mathematics learning outcomes between male and female students, 2) to determine the differences in the mathematics learning outcomes of students from mathematics and science, social, language, and vocational majors. The population is the third semester of elementary school teacher education Universitas Negeri Semarang (UNNES) students. Samples were obtained randomly. The authors using non-parametric data tests because the data were not normality distributed. From the 228 data obtained, the Mann Whitney data test obtained the Asymp.Sig. 0.57> 0.05, so the fact that there is no difference in mathematics learning outcomes of elementary school teacher education UNNES students when viewed from gender. However, if it is viewed from the specialization of the major in Senior High School, the Kruskal Wallis data test obtained the Asymp.Sig. 0.001 <0.05, so the fact that there is a significant difference in mathematics learning outcomes of elementary school teacher education UNNES students.
Analysis of students difficulties in mathematical abstraction thinking in the mathematics statistic course
Authors: Nurrahmah A , Zaenuri  , Wardono
Published: June 2021

This study aims to analyze and describe student difficulties in solving mathematical abstraction thinking problems in the Mathematics Statistics subject. This research is qualitative research with the research subjects being students of the mathematics education study program at the University of Indraprasta PGRI Jakarta. The sampling technique used in this study was purposive sampling and the instruments used were documents in the form of the results of the Initial Mathematical Capability test, tests of mathematical abstraction thinking ability, observation sheets, interview guidelines, then analyzed using the triangulation technique. The results showed that for all indicators of students’ mathematical abstraction thinking ability, average overall achievement and based on Initial Mathematical Capability level, on the indicator ‘problem transformation into symbol form’ and ‘process of manipulating symbols’ lower than the indicator ‘making generalizations’ and ‘the formation of mathematical concepts related to other concepts’.
Developing Mathrun with construct 2 on the solid geometry with flat faces for junior high school
Authors: Abrar A I P , Nursalam  , Kusumayanti A , Suharti  , Sriyanti A
Published: June 2021

This study aims to: 1) produce Mathrun with Construct 2 on the Solid Geometry with Flat Faces for Junior High School which is valid, practical, and effective. The subjects of this study were 8th grade students of MTs Madani Alauddin Pao-Pao, Gowa in the 2019/2020 school year. This study used a development model proposed by Borg and Gall with 10 stages, namely: 1) problem analysis; 2) Media Design; 3) Product improvement; 4) Individual Test; 5) Validation; 6) Small Group Test; 7) Repair; 8) Field Test; 9) Repair; 10) Dissemination and Reports. However, due to limited time, funds and personnel, this research was limited to the 9th stage. The data collection instruments used questionnaires, responses and test questions. The validation was carried out by education experts, teachers and students. Based on the results of the validation of the feasibility average score for the development of learning media using the Construct 2 software by educational experts, it was obtained 3.40. The practical aspect based on the teacher’s assessment of mathematics was 3.45 which is good criteria. The score of practicality based on the students’ attractiveness was 3.449 which is very good criteria. Meanwhile, the average learning outcome test is complete. Therefore, it can be concluded that the learning media developed have met the criteria of validity, practicality, and effectiveness.
Implementation of google single sign On (SSO) in the library management system
Authors: Purwinarko A , Hardyanto W , Adhi M A
Published: June 2021

Almost all organizations provide web-based services as an effort to provide excellent services to users, such as a library, academic, financial, and other services. Organizations only need to provide Single Sign-on (SSO) services for their users, and users need one set of credentials (user name and password) to access all organizational services. The SSO service developed is based on the Google Authentication API. This SSO makes communication between systems more effective and efficient.
Development of an information system for measuring the service satisfaction index for education personnel services
Authors: Utami N R , Marianti A , Purwinarko A
Published: June 2021

The evaluation process of implementing the quality system in the Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang, is used to maintain the quality system’s continuity with predetermined standards. Therefore, we need an information system to measure the service quality satisfaction index (SIANTIK), which is well-established to obtain accurate, credible, and accountable data for Faculty leaders’ policymaking. Information system development using the RAD method. This information system testing uses the black bock method. The test results show that the system is feasible to use.
Inhibition of breast cancer cell development using Citrus maxima extract through increasing levels of Reactive Oxygen Species (ROS)
Authors: Mursiti S , Amalina N D , Marianti A
Published: June 2021

Excessive Reactive oxygen species (ROS) level can lead to the activation of apoptosis and inhibit metastasis through the NF-κB pathway. Therapeutic approaches by increasing ROS level may be effective strategic in cancer treatment. Citrus maxima (CM) is one of a natural medicinal plant that exhibits cytotoxic effect on several cancer cells. However, the CM extract effect to regulate ROS level remains unclear. Therefore, in this study aims to evaluated the cytotoxic effects of CM extract on metastasis breast cancer MDA-MD-231 cells. Cytotoxic activity of CM extract was evaluated using MTT assay, ROS levels was calculated under flowcytometry. Furthermore, the binding interaction between phytoconstituents and protein that responsible on the ROS metabolic pathway was analyzed under in silico molecular docking. The presence of CM extract increased cells death with IC50 value of 338 μg/mL for 24 h through induction of ROS levels. Molecular docking studies revealed that the hesperidin displayed the best binding energies at -21.4766 (NF-κB) kcal/mol. The binding interaction of hesperidin with the active site of NF-κB protein suggested that amino acid residues (His537, Asp519, Gly407, Gln479, Arg416) might play a role in ROS metabolism. These findings have shown that CM extract inhibited cancer proliferation by increasing ROS levels.
Quantification of polyphenol, antioxidant, and antibacterial from red and purple roselle calyces using maceration extraction under different solvent conditions
Authors: Kusnadi  , Purgiyanti
Published: June 2021

This research was conducted to extract polyphenols, antioxidants, and antimicrobial red and purple roselle calyces (Hibiscus sabdariffa L.) with maceration techniques using different types of solvents. Total polyphenols were determined using the Folin-Ciocalteu method. The antioxidant activity was expressed as the DPPH reduction, and antimicrobial activity were evaluated against the Staphylococcus aureus and Escherichia coli bacterial strains. The most significant extraction yield was obtained using ethanol at a concentration level of 80% in two rosella varieties (red and purple). In contrast, the polyphenol content of purple roselle was relatively higher than that of red roselle. The maximum total polyphenols in the extraction process in purple roselle with methanol 80% (27.60 mg GAE/g), while the minimum phenolic (9.50 mg GAE/g extract) in red roselle with 50% ethyl acetate solvent. The antioxidant activity increased in the antioxidant test, where 80% methanol extract showed the highest scavenging antioxidant activity, 73.84 ± 0.53% and 62.80 ± 1.57% for purple and red roselle calyces. The inhibition zone was obtained against E. Coli (13.45 ± 3.30 mm) on the purple roselle, and the inhibition zone was obtained for S. aureus (11,4 ± 0,04) on the red roselle. It was concluded that red and purple roselle calyces are a prospective source of antioxidant and antimicrobial phenolic compounds.
Species richness, distribution, and phenotype relationship of bamboos in Kecubung Ulolanang Nature Reserve (KUNR) on Batang
Authors: Adriani L R , Ngabekti S , Partaya
Published: June 2021

Bamboos have various benefits and disadvantages. Research on bamboo in KUNR has never been done, so there is a need for research related to species richness, distribution, and kinship relationships. The purposes of this research were to identify species and determine bamboos kinship relationships. Research is useful to provide information of Bamboos in KUNR to the community, BKSDA of Central Java, and subsequent researchers. The data collection method uses the observation method. Species and number of individual data were analyzed qualitatively and quantitatively, determine descriptions, weights at each OTUs, analyzed Margalef species wealth index, Pearson correlation and Cluster analysis. Types of bamboos found included: Gigantochloa apus, Bambusa blumeana, Bambusa vulgaris var. vulgaris, Bambusa vulgaris var. striata, Gigantochloa atriviolaceae, Dendrocalamus asper, Schizostacyum sp, and Schizostachyum silicatum. The bamboo species wealth index in all PALs falls into the bad category, because it has a value of <2.5. The closest bamboos kinship is Bambusa vulgaris var. vulgaris with Bambusa vulgaris var. striata, while the furthest is Bambusa blumeana with Bambusa vulgaris var. vulgaris and Bambusa vulgaris var. striata.
Detecting helminth eggs on the body surface of flies in markets in Makassar
Authors: Jabal A R , Ratnasari A , Ifandi S , Suriawanto N , Wahyudi P , Pisu A J , Tuhuteru F M , Pawane M S
Published: June 2021

Flies as mechanical vectors of disease spread in humans. This study aimed to detect helminth eggs on the flies body surface in markets in Makassar City Market. Flies collected in sale places such as vegetables, chicken and beef, cakes, fish, and trash cans at the market. Then flies and helminth eggs were idemtificated examined in the laboratory for identification of flies and helminth eggs. Flies found throughout markets in Makassar City were Musca domestica, Calliphora spp., and Sarcophaga haemorroidalis. The highest flies number of was Calliphora spp. (n=27) at the fish sale place in Tamalate market. The greatest number of egg helminth was Taenia sp. (n=17) found on the body surface of Chrysomia sp. This study showed that most helminth eggs found on the body surface of Chrysomia sp. compared to other flies.
Biochemical and organoleptic analysis of zicurma herbal medicine towards mass production
Authors: Rudyatmi E , Bintari S H , Sunyoto
Published: June 2021

Zicurma herbal medicine has been prepared from a mixture of Zingiber officinalle, Curcuma xanthorrhiza, and Curcuma domestica. One of the conditions for mass production of Zicurma herbal medicine is the consistency of the active ingredients and additives. This study aims to analyze the continuity of the chemical content and analysis of people’s preference for the Zicurma herbal medicine. This type of qualitative descriptive research. Chemical analysis focused on flavonoid content, antioxidant activity and was complemented by the viscosity. The preference test is focused on the aspects of the product’s physical appearance, packaging and taste. The number of respondents was 30 people. Flavonoid analysis results ranged from 125.5 -126.5 mg/100 gr, antioxidant activity between 7.01 - 7.40%, and, viscosity between 26.09 - 26.99 cP. The number of respondents who really liked drinking Zicurma herbs with sugar concentrations of 4%, 6%, and 8%, namely 3.33%, 36.66%, and 23.33%. The number of respondents who liked to drink the herbal medicine Zicurma with a concentration of 4%, 6%, and 8%, namely, 60%, 50%, and 73.33%. The chemical content of the Zicurma herbal medicine is relatively consistent. Respondents tend to like to drink the herbal medicine Zicurma with a sugar concentration of 6% and 8%.
Medicinal plant of Gunung Prau, Indonesia: exploration and ethno-botanical study
Authors: Abdullah M , Priyono B , Kartijono N E F , Bodijantoro P M H
Published: June 2021

This study aims to obtain information about local people’s knowledge of plant species, both wild in the forest and cultivated by the local community for use as medicine and health. The results of reference tracing will also reveal the potential active ingredients useful in the medical industry based on the identified plant species. This research design is descriptive exploratory. The study was conducted for 8 months. The work steps in this study consisted of 1) preliminary study, 2) determining the area of observation and respondents, 3) exploration of plants in residential and forest areas, 4) interviewing respondents, 5) analysis of research results. The results showed that as much as 51.6% of the explored plants (wild and cultivated) were known to have medicinal properties. Most of the medicinal plants found in the yard, while others in gardens and forests. The people around the slopes of Mount Prau still use several types of plants to treat various diseases. However, it is unfortunate that people’s knowledge about the efficacy and number of types of diseases that can be treated for each plant species is still relatively low.
Developing four-tier diagnostic test to measure students’ misconceptions on simple harmonic motion material
Authors: Janah A F , Mindyarto B N , Ellianawati
Published: June 2021

This research developed four-tier multiple choice test items to measure its validity, reliability, characteristics, and students’ misconceptions on Simple Harmonic Motion material. This research was Research and Development (R & D) using 3D (Define, Design, and Develop) development model. The tenth graders of 1 Slawi Senior High School participated in tryout test and the eleventh graders of 1 Kramat Senior High School participated in the final field test. This research used documentation, interviews, questionnaires, and tests to collect the data. The developed test consisted of 30 four-level multiple choice items covering questions, the level of confidence in answering questions, reasons, and the level of confidence in giving reasons. This research yielded validity, reliability, discrimination power, difficulty level, and the percentage of misconceptions analyses. Validation results from 8 validators stated that the instrument was very feasible with the average percentage of 86.23%. The content validity result using Aiken coefficient got the average score of 0.80 with the valid category at the 0.05 significance level. The reliability of the developed test was 0.892. The difficulty level indicated 5 easy items, 22 medium questions, and 3 difficult questions. Students experienced misconceptions on Simple Harmonic Motion material of 58.63% in the medium category.
Profile of reasoning ability and reduction of mathematical anxiety in analogy-based physics learning
Authors: Ellianawati E , Subali B , Khotimah S N , Cholila M
Published: June 2021

The analogy approach in learning physics encourages students to use logical reasoning in understanding physics concepts without anxious about mathematics. The purpose of this study were to analyze the reasoning abilities and the reduction of mathematics anxiety of students in analogy-based physics learning. This study used a mixed method design with an embedded experimental model by involving 72 students at senior high school. Quantitative data from the test were triangulated with qualitative data from questionnaires, observations, and psychological tests of mathematics anxiety. Based on data analysis, it was found that the ability to explore facts in questions, identify problems, apply physics concepts increased by an average of 41.66%, while making conclusions 22.50%. Meanwhile, based on the psychological scale analysis of anxiety which is divided into three clusters, the mathematics anxiety cluster on assignment (MAA), in the class (MAC), and for the student’s future (MAF) has decreased by 21.76%, 32.87%, and 18.29% respectively. It can be concluded that the analogy-based physics learning significantly improve reasoning skills and reduce mathematical anxiety of students. Analogy-based learning encourages students to be able to solve physics problems by linking concepts with the peculiarities of phenomena which also have an impact on reducing their math anxiety.
Connections between prior knowledge and collaborative skill on discussion group about solar system related to descriptive scientific reasoning
Authors: Susilawati  , Ramalis T R , Kaniawati I , Rusdiana D
Published: June 2021

The aim of this study is to analysis the connections between student’ prior knowledge and collaborative skills in discussion groups associated with student scientific reasoning about the solar system. The student’ prior knowledge contributes to building student scientific reasoning and supported by collaborative skills through discussion groups. The analysis between two variables that influence student scientific reasoning, namely prior knowledge and student collaborative skills. Method of this study is quasy experimental design with quatitative approach. The group of student who took part in the astronomy lecture consisted of 5 groups each of which 6 student. The results of the prior analysis of student’ knowledge of each group is quite low. Process, project and outcome predictions regarding prior knowledge and collaborative skills related to the formation of scientific reasoning have a high enough category in the aspect of results and a fairly low category in the process aspect. After the implementation of collaborative learning through discussion shows the results of research that significant relation between student’ prior knowledge and student collaborative skills that strengt then student scientific reasoning. Student tend to build scientific reasoning based on prior knowledge and discussion in collaborative learning. This is prior knowledge significantly influences the chronology of student in the discussion. Other found student with low prior knowledge experienced an increase in scientific reasoning through interaction and discussion in collaborative learning.
Improving conceptual understanding on temperature and heat through modeling instruction
Authors: Taqwa M R A , Taurusi T
Published: June 2021

Although conceptual understanding is one of the goals of learning physics and influencing other thinking skills, many students have difficulty in understanding physics concepts. This study aims to determine the increase of students’ conceptual understanding through Modeling Instruction in Temperature and Heat. The subjects of this study were 63 students of SMAN 5 Jambi in class XI-science. The research design uses one group pretest-posttest design that is analyzed quantitatively. Data obtained from the pretest and posttest values which are then presented in the form of percentages and statistics. Quantitative data were analyzed by determining descriptive statistics, paired sample t tests, then continued the N-gain test and effect size. The qualitative data analysis is done by reducing data, presenting data, and drawing conclusions. The results showed that there was an increase of 0.397 (medium) in the posttest value. The influence of modeling instruction on increasing students’ concept mastery is seen from the d-effect size of 4.814 (high). The results of this study suggest that teachers should teach with Modeling Instruction on the topic of Temperature and Heat. On the other hand, based on the results of the interview, students still have difficulty in understanding fundamental concepts and understanding concepts in various representations.
Development of simulation integrated learning model with mikir approach to school for disaster mitigation
Authors: Rusilowati A , Supriyadi  , Hidayah I , Abidin Z
Published: June 2021

Indonesia is a country that is prone to disasters. Therefore disaster mitigation needs to be introduced to students. This study aims to: (1) develop a model of disaster mitigation through learning in schools, (2) test the validity of disaster mitigation learning models, (3) test the effectiveness of disaster mitigation learning models in increasing understanding student skills towards the concepts, principles and practice of self-rescue in the event of a natural disaster. This research is a research and development (R&D). The research design starts with a theoretical exploration and review of disaster mitigation material to be taught, validation of the model, test the effectiveness of the model and ends with a practicality test of the model. Data analysis techniques with descriptive and quantitative. The results of the study are disaster mitigation models through learning with integrated simulation models with MIKiR approach that have been validated by experts (academics, practitioners, and policy makers), and effective to increase of. understanding student skills towards the concepts, principles and practice of self-rescue in the event of a natural disaster with N-g = 0.62 in middle catogory
Development of plant physiology practical guide book with scientific approach for education
Authors: Rahmi M
Published: June 2021

The main problem in the several high school in Padang is their Plant Physiology Lab Work Guide still made in cookery book type. This is affected to the less activity of student in the practice activity. The lab work guide with cookery book type is not optimal to develop students’ skill in science process. This research goals was to produce valid, practical, and effective plant physiology practical guide with scientific approach for university. The research use the Plomp’s development model that has 3 phases; the preliminary research, the prototype phase, and assessment phase. The data collection instruments are validator sheet of lab work guidance, practicalities of lecturer and student questionnaire, observation of student’s psychomotor and affective sheet and the test result of student study. The data were analysed with the description of the percentage results that was got on the field. The validation score is 81,20% with very valid category, the practicalities score 90% by lecturer with very practical category and 82,78 % by students with very practical category too. The conclusion of this research is the plant physiology lab work guide with scientific approach for university developed is valid practical, and effective.
Explicit scientific argument on science teaching as an inquiry: designing activity on online schema using fuzzy delphi method
Authors: Hendrastuti Z R , Siswanto S , Muhlisin A , Firmadani F , Hartono H , Subali B. , Elianawati E
Published: June 2021

In science learning, inquiry and argumentation activities can make science teaching and learning meaningful by maintaining the science as a process and a product. In addition, both of them were able to train higher order thinking skills. This study aims to design an online science learning process using the stages of inquiry learning that includes argumentation activities. The Fuzzy Delphi Method (FDM) is employed to design the stages of learning activities involving 10 experts, including researchers in the field of science learning design, learning psychology, and also practitioners (science educators). Based on the FDM method, learning stages are arranged consisting of three online sessions where each session is carried out in one online learning meeting. The first session was in the form of identifying problems, conducting literature studies, formulating hypotheses by proposing scientific arguments. The second session is in the form of activities to prove the truth of the proposed hypothesis (collecting data), analyzing data, and evaluating the proposed hypothesis along with the scientific arguments that are prepared. The third session communicated the findings of the investigation. Based on the results, the stages of learning activities are very suitable for application in science learning which is carried out online.
Pesisir culture-based analogy presentation format used by elementary school students
Authors: Handayani L , Haryono S , Suseno  , Nugrahani R , Nugroho S E , Rohidi T R , Wiyanto
Published: June 2021

The similarity in characteristics between students’ life experiences and some of the science concepts supports the need to use analogies in learning science in elementary schools. This paper discusses the research results aimed at exploring the analogical thinking skills of students based on culture, especially in the Pesisir area. The discussion’s main focus lies in the format of the presentation given by students when presenting the analog of the concepts of electric current and plant motion. Data were collected through observation, interviews, and literature study from various selected school sources in the Pesisir cultural area: the Tegal Regency. Derived conclusion based on data analysis and discussion stated that students’ dominant presentation format to explain the scientific concepts given in this study analogically is the verbal-pictorial format.
Measurement of TPACK self-efficacy for pre-service science teachers
Authors: Yulianti D , Utami N R , Ridloand S , Isdaryanti B
Published: June 2021

This study aimed to measure the TPACK self-efficacy of prospective science teachers based on Koehler and Mishra’s technological pedagogical content knowledge (TPACK) theoretical framework. The instrument in this study was developed by Kiray, which consists of seven subscales; the total number of items was 55. To test the instrument, 158 students were used as respondents. Research respondents comprised 312 students in a senior year from the Faculty of Math and Science Universitas Negeri Semarang. Confirmatory factor analysis was performed for the construct validity of the scale. The analysis results showed that the number of items from 55 to 49 items and eight subscales. The Cronbach alpha internal reliability coefficient was calculated using SPSS 20.0 as 0.968; reliability composite 0.959, which means the scale developed was feasible to measure TPACK self-efficacy perception of pre-service science teachers. The results obtained indicate that the average TPACK self-efficacy was in the medium category.
Thermal stability tuning without affecting gas-binding function of Thermochromatium tepidum cytochrome c′
Authors: Fujii Sotaro , Kobayashi Satoru , Yoshimi Taisuke , Kobayashi Yuji , Wakai Satoshi , Yamanaka Masaru , Sambongi Yoshihiro
Published: June 2021

Hydrogenophilus thermoluteolus, Thermochromatium tepidum, and Allochromatium vinosum, which grow optimally at 52, 49, and 25 °C, respectively, have homologous cytochromes c′ (PHCP, TTCP, and AVCP, respectively) exhibiting at least 50% amino acid sequence identity. Here, the thermal stability of the recombinant TTCP protein was first confirmed to be between those of PHCP and AVCP. Structure comparison of the 3 proteins and a mutagenesis study on TTCP revealed that hydrogen bonds and hydrophobic interactions between the heme and amino acid residues were responsible for their stability differences. In addition, PHCP, TTCP, and AVCP and their variants with altered stability similarly bound nitric oxide and carbon oxide, but not oxygen. Therefore, the thermal stability of TTCP together with PHCP and AVCP can be tuned through specific interactions around the heme without affecting their gas-binding function. These cytochromes c′ will be useful as specific gas sensor proteins exhibiting a wide thermal stability range.