bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Influence of Inquiry Learning Method Aided by Open Ended Worksheet Towards Quantitative Reasoning and Self-Esteem
Authors: Arisujati N W , Sariyasa  , Suweken G 
Published: August 2020

Abstract
Problem solving plays an important role in mathematics and should have a prominent role in mathematics education. Some factors that affect students’ problem-solving ability are quantitative reasoning and self-esteem. The general objective of this research aims to compare quantitative reasoning and self-esteem of students who were taught using inquiry learning with open ended worksheet and those who were taught using conventional learning. This research used quasi-experiment approach with randomize posttest-only control group design. The population of this study consisted of 255 seventh grade students in Singaraja. In addition, cluster random sampling was used to get two groups. The experimental group was taught using inquiry learning method with open ended worksheet and the control group was taught using conventional learning. The data was collected using test and non-test technique then analyzed using Manova. The results showed that quantitative reasoning and self-esteem of students who were taught using inquiry learning model with open ended worksheet were better than students who were taught using conventional learning model. Inquiry learning model with open ended worksheet give students more chance to explore their thinking and idea in solving problem. This model contributes in the improvement of students’ capabilities in quantitative reasoning and self-esteem.
The Effect of Online Discussion in Blended Learning on Students’ Mathematical Concept Comprehension and Attitude
Authors: Yulia Prawestri Putu , Gusti Putu Sudiarta I , Wayan Puja Astawa I 
Published: August 2020

Abstract
This research aimed at (1) investigating if asynchronous online discussion in Blended Learning (BL) affect positively on students’ concept comprehension and attitude, as well as (2) describing why asynchronous online discussion in BL is better at improving students’ concept comprehension and attitude. This research combined quantitative and qualitative research utilizing explanatory sequential design. The quantitative design with Randomized Posttest-Only Comparison Group Design with a sample of 68 junior high school students in Bali, the qualitative design used descriptive approach on five population subjects which was done purposively. The quantitative data in the form of students’ concept comprehension and attitude was collected by using essay test and questionnaire. The qualitative data was in the form of: (a) students’ responses towards the implementation of online discussion, (b) online and group discussion activities, (c) students’ works, collected by using (a) interview, (b) observation sheet, (c) documentation. The quantitative data was analysed by using Manova test with 5% significance level. The qualitative data was analysed in the steps of: (a) data reduction, (b) data presentation, and (c) data verification. The result of the experiment showed that the concept comprehension and attitude of the students who attended asynchronous online discussion in BL was significantly better than the students who attended synchronous online discussion in BL. This was because the students who attended asynchronous online discussion were more enthusiast, more trained in communicating their understanding, more motivated in discussion and in learning process.
Why should you reverse the order when dividing a fraction? A study of pre-service mathematics teachers’ pedagogical content knowledge in fractional concept
Authors: Apsari R A , Sariyasa S , Indrawan G , Maulyda M A , Radiusman Radiusman 
Published: August 2020

AbstractThis study was a part of larger study in examining pre-service mathematics teachers’ Pedagogical Content Knowledge. The aim of the present study was to elaborate the prospective teachers’ conceptual understanding in fraction and how they will teach it for the students. There were 50 participants in this study, all of them are the final year students of mathematics education study program of a state university in Bali who already took the teaching internship program in the school. The data were collected through written test and continued by interview with the participants. The data were analysed qualitatively using descriptive method. From the result, it is found that the prospective mathematics teachers have a difficulties in understanding the concept of fraction. It leads to the lack comprehension in teaching the concept to the students. Reflect to the result, it is recommended to the teacher training institution to emphasize the big ideas in school mathematics’ topics to ensure the prospective teachers have a sufficient knowledge to teach mathematics meaningfully.
Development Content and Online Discussion Strategy in Blended Learning to Improve Student Mathematical Learning Outcomes
Authors: Patni L D P , Sudiarta I G P , Suparta I N 
Published: August 2020

Abstract
Content and strategies online discussion have an important role in blended learning, but the content and strategies currently implemented have not been able to contribute optimally. This study aims to identify the characteristics of content and the application of online discussion strategy and describe their quality in terms of validity, practicality, and effectiveness as means to improve students mathematics learning outcomes. This research is a developmental research with Design Based Research approach. The subject of this research were students of VIII SMP Negeri 1 Mengwi in academic year 2018/2019. Learning outcomes data collected in the form of data understanding students’ mathematical concepts and student attitudes in learning mathematics. The data were analyzed descriptively. This research produce blended learning content that meets valid, practical and effective criteria. The content has the following characteristics : 1) Text, containing a summary of the material and focuses on the ability of students to construct their own knowledge. 2) Interactive media, being able to actively involve students in learning abstract concepts with the helping of illustrations and visualization. 3)Video links, helping students improve their mathematical skills such as the ability to decrease formulas. 4) Exercises, containing variations in the types of questions and giving students instant feedback. This research also resulted in effective online discussion strategy with the following steps : seting goals for online discussion, preparing role for online discussion, preparing content that facilitates students to learn independently, motivating students to have the confidence to hold discussions, involving teachers to moderate discussions, implementing reward and punishment by giving points and additional tasks respectively to increase positive competitiveness, evaluating by giving online quizzes. Learning outcomes obtained by students have increased, 79.70 in first try out and 82.76 in second try out. Thus, it can be concluded that the quality of content and online discussion strategy have an important role in improving student mathematics learning outcomes.
Criticality Analysis of Thorium Element (ThO2) Insertion at Various Location in the Kartini Reactor Core
Authors: Salam Mahrus , Syarip  
Published: August 2020

Abstract
The criticality analysis of Kartini reactor by inserting of thorium element contained in ThO2 has been done. The main objective of this research was to observe the effect of thorium element insertion to the criticality level of Kartini reactor. The analysis method was a neutronic computation using MCNP computer code. The criticality analysis was performed by inserting a thorium element of several different masses at several locations in the reactor core. The analyses were performed for the insertion of ThO2 at several different positions from ring B to ring F of the reactor core. The result showed that in the general, by inserting the thorium elements on the reactor core would generate a smaller k-inf. It was because thorium would produce a negative reactivity in the reactor core. This analysis result showed that the reactor is on the subcritical level (k-eff. < 1) when 3000 g of ThO2 was inserted in the ring B, C and D. Meanwhile, it still on the critical level (k-eff. ∼ 1) when ThO2 element was inserted in the ring E and F. However, to ensure the safety of the Kartini reactor during this experiment, it was necessary to calculate the shutdown margin (SDM) and also radial power peaking factor. The analysis showed that the calculated SDM was 2.5$ and the radial power peaking factor was 1.5. These values still meet the required value for the Kartini reactor i.e. SDM should be higher than 0.5$ and the radial power peaking factor should be lower than 1.75.
Zero gravity of free-surface flow under a sluice gate
Authors: Wiryanto L.H. 
Published: August 2020

Abstract
Free surface flow is a classical problem in hydrodynamics, such as flow under a sluice gate. The ratio between the uniform depth at far downstream and the height of the gate, called contraction coefficient, is important in building the sluice gate. In this report, that number is calculated based on a model of potential flow, without involving gravity. A conformal mapping and defining an analytical function can are the main mathematical problem that should be done, before solving the model. Here, we mainly determine the coordinates of the free surface of thow from the gate, they are calculated by integral form, and at far downstream we obtain the fluid depth as used to calculate the contraction coefficient, i.e. 0.611.
Antibacterial evaluation of 2,4-dihidroxy benzoic acid on Escherichia coli and Vibrio alginolyticus
Authors: Ngurah Budiana I Gusti M. , Ni Nyoman Yuliani , Dafroyati Yuliana , Gede Aris Gunadi I , Taneo Malkisedek 
Published: August 2020

Abstract
In recent years, human pathogenic microorganisms have developed resistance in response to the indiscriminate use of commercial antimicrobial drugs commonly employed in the treatment of infectious diseases. Therefore, research to discover the new anti-bacterial compounds is important to do. This study was carried out with an objective to synthesis and invaluated the antibacterial potentials of 2,4-dihidroxy benzoic acid. The aim of the study is to synthesis and assess the antimicrobial activity and to determine the zone of inhibition of on Escherichia coli and Vibrio alginolyticus. The synthesis of 2,4-dihidroxy benzoic acid was conducted by reacting 2,4-dihidroxy benzene and carbon dioxide. The characterization of the target compounds was performed by IR and MS spectrometers. The growth of the tested bacteria was observed using a colony counter to see the diameter of the resistance which was caused by the test solution. The antibacterial activity test indicated that 2,4-dihidroxy benzoic acid had the potential as an antibacterial against Escherichia coli and Vibrio alginolyticus. The synthesis product was obtained as a white solid, melting point 168-169 °C, 67.5 % yield and 97.5 % purity. The activity was known from its inhibition zone. At the concentration of 100 ppm, 2,4-dihidroxy benzoic acid solution showed the diameter of the inhibitory zone was 17.8 mm and 17.0 mm respectively, while amoxicillin antibiotic showed of 16.6 mm. These results indicate that 2,4-dihidroxy benzoic acid have a greater strength than amoxicillin in inhibiting bacterial growth Escherichia coli and Vibrio alginolyticus.
Development of Green Chemistry Learning Book to Improve Students’ Learning Outcomes
Authors: Sri Wulan I D A , Redhana I W , Adnyana P B 
Published: August 2020

Abstract
This study aimed to produce a green chemistry learning book to improve students’ learning outcome. Type of study was a research and development by adopting the Thiagarajan model. The stages of this study included (1) define phase including front-end analysis, students’ analysis, task analysis, concept analysis, and specifying instructional obejctive, (2) design phase including preparation of syllabus, lesson plan and the green chemistry learning, (3) develop stage including testing of validity, practicality and effectivy of the green chemistry learning book. The data in this study were analyzed using descriptive statistical analysis techniques. Data analysis result obtained in this study were need analysis data of teacher and student, the characteristics of learning book, validity, practicality and effectiveness data of learning book. The results of the study indicated that (1) the characteristics of the learning book which were developed included the presentation of the dangers of synthetic chemicals, the prevention of the use of synthetic chemicals, and the substitution of synthetic chemicals with environmentally friendly materials, (2) learning book developed had valid, practical and effective categories. The learning book could be applied to improve students’ learning outcome.
Students’ Mental Models in Acid-Base Topic Based on Gender
Authors: Putriani V D , Redhana I W , Maryam S 
Published: August 2020

Abstract
This study aimed to describe differences of student’s mental models based on gender and the factors influencing the student’s mental models in understanding acid-base topic. The study was a survey research. The population consisted of 279 students of 11th-grade of Mathematics and Natural Sciences Classes of SMA Negeri 1 Singaraja in Buleleng Bali at an academic year of 2018/2019. In this study, all members of the population became members of the sample. The data needed in this study were the student’s mental model scores and factor that influence student’s mental model. Data were collected using a diagnostic test and questionnaire. Data were analysing descriptively by grouping student’s mental models based on gender and factors that influence student’s mental model. The results showed that there was no significant difference in student’s mental model based on gender. In addition, most of the factors that influence student’s mental model were the internal and external factors.
Macronutrients Level And Total of Bacteria From Combination of Banana Stems And Coconut Fibers With MA-11 As Bioactivator
Authors: Suryanti I A P , Santiasa I M P A 
Published: August 2020

Abstract
The purposes of this research were to determine the maximum macronutrients content of C, N, P, K and the total of bacteria from combination of banana (Musa paradisiaca) stems, and coconut fibers that is using local microorganism MA-11 as a bioactivator. The combination includes Combination 1 (K1): 250 grams of banana stems and 250 grams of coconut fiber; Combination 2 (K2): 375 grams of banana stems and 125 grams of coconut fiber; Combination 3 (K3): 125 grams of banana stem and 375 grams of coconut fiber. Each combination added 1 liter of coconut water, 125 grams of sugar and 125 ml of MOL MA-11 which was fermented for 7 days. The contents of C, P and K in liquid organic fertilizer were determined by using a spectrophotometer, while N levels were determined using semi micro kjeldahl. The number of bacteria in each combination is calculated using the total count method. The results showed that the higest of total Carbon (C) was found in combination 1 (K1) of liquid organic fertilizer, namely 14.35%. The maximum macronutrients N, P and K are found in the combination 3 (K3), respectively 2.48 % (N), 0.66 % (P) and 2.19 % (K). The highest total count of bacterial was found in combination 3 (K3) was 8.2 x 107 cfu/ml.
The Effectiveness of the Think Pair Share Model Based on Questions to Improve Students’ Participation and Students’ Learning Outcomes about Histology Structure of Digestive System
Authors: Citrawathi D M , Widiyanti N P M , Adnyana P B 
Published: August 2020

Abstract
This study aimed to determine the effectiveness of Think Pair Share learning based on questions models to increase students’ participation and learning outcomes in studies of the histological structure of the digestive system. To achieve these objectives, research was conducted on the Biology study program at the Faculty of Mathematics and Natural Sciences, Ganesha University of Education. Research sample was the second semester students, amount of 17 students. The design of this study was one short case study. Instruments used in this study included questionnaires and observation sheets to assess students’ participation and responses in learning, and knowledge tests to assess student cognitive learning outcomes. The results obtained by the value of students’ participation were 47.1% in the good category and 47.1% in the very good category with an average value of 83.12. Cognitive learning outcomes obtained a mean value of 76.0. Students who got a greater or equal value of 70.0 were 76.5%. The conclusion of this research were that the Think Pair Share Learning model based on questions could increase students’ participation and learning outcomes in the study of the Histological Structure of the Digestive System.
The Effect of Digital Literacy on the Ability of Teachers to Develop HOTS-based Assessment
Authors: Wayan Widana I 
Published: August 2020

Abstract
Digital literacy and the ability to develop HOTS-based assessment are important competencies for teachers in industrial revolution 4.0. The purpose of this research is to determine the effect of digital literacy on the ability of teachers to develop HOTS-based assessment. This study is survey research. The population is senior high school and vocational high school mathematics teachers in Bali, West Nusa Tenggara, and East Nusa Tenggara provinces. Multistage random sampling technique is applied. The data is collected by using a questionnaire. It is analysed by using simple regression analysis methods. Data processing is carried out by using the SPSS 23.0 program with a significance level of alpha = 0.05. The results of data analysis show a value of F = 60.594 with a significance value 0.000 which means that digital literacy has a significant effect on the ability of teachers to develop HOTS-based assessment. The magnitude of the digital literacy influence on the ability of teachers to develop HOTS-based assessment is 13.2%. Thus, the ability of teachers to develop HOTS-based assessment can be influenced by other factors of 86.8%. The recommendation proposed is that further research is needed to reveal other variables that contribute on the ability of teachers to develop HOTS-based assessment.
Profiles of Environmental Literacy of Senior High School Students
Authors: Redhana I W , Suardana I N , Selamat I N 
Published: August 2020

Abstract
This study aimed to describe the environmental literacy of high school students in Bali Province, Indonesia. For that reason, the study conducted was survey research. The population of the study was high school students in the Bali Province, Indonesia. Population of the study was 40.608 students. Samples were drawn by a multistage random sampling technique. Each district was chosen 50 students randomly. Thus, there were a total of 450 students as research samples. The research samples consisted of the tenth, eleventh, and twelfth-grade students, each of which amounted to 131, 263, and 56 people and the number of male and female students was 151 and 299 people, respectively. Students’ environmental literacy data were collected with an environmental literacy inventory developed by researchers. This inventory consisted of five dimensions, including knowledge (15 items), concern (15 items), sensitivity (16 items), attitude (9 items), and behavior (8 items) towards the environment. Inventory is created in Google forms and circulated online. The data obtained in this study were analyzed by calculating the average score of environmental literacy and then changed from a scale of 5 to a scale of 100, then grouped into the categories of very low (0 - 20%), low (21 - 40%), moderate (41 - 60%), high (61 - 80%), and very high (81 - 100%). The results showed that overall the environmental literacy of students was classified as a high category. However, the dimension of knowledge was in the medium category, while the other dimensions were in the high category.
The role of families and school environments on juvenile delinquency in Denpasar City: A quantitative approach
Authors: Kencana Eka N , Tastrawati Tari , Jayanegara Ketut 
Published: August 2020

Abstract
Adolescence is a transition period from children to adults with its characters are (a) the existence of an extension of the self; (b) the existence of self-objectification; and (c) the growth of the philosophy of life. In the transition process, an adolescent will experience a personality formation that occurs not in a simple way and has a potency for self-conflict. The existence of incompatibility between the three adolescent characteristics and the values or norms that are generally acceptable in the community has the potential to trigger an ‘emotional outburst’ for the youth if it was not properly handled by the teenager or by his/her parents and the surrounding environment. This self-conflict potentially leading to acts of irregularities, commonly refers to juvenile delinquency. This essay aims to study the effect of the socio-economic background of the family and school environment on juvenile delinquency at Denpasar City, the capital of Bali province. A hundred and fifty senior high school students at Denpasar, randomly selected as the respondents and were asked to fulfill the self-regulated questionnair´e. By applying the variance-based structural equation modeling (VB-SEM), we found the socio-economic factors have a bigger effect on juvenile delinquency than the influence of school environments.
The Effectiveness Of Learning Tools In Science Learning
Authors: Parwata K Y L , R Sudiatmika A A I A 
Published: August 2020

Abstract
Learning tools are thing that used to help students learn more effectively and efficiently. This study aimed to determine the effectiveness of learning tools to support the science learning process. The Subjects of this study are articles obtained through the search site https://scholar.google.co.id that relevant to the issue. There were 3 selection steps to collect articles used as the main data sources. The first selection based on the title of the article. The second selection arranged through abstract scanning. The third selection conducted by reading the entire contents of the article. Through the selections, 40 accredited articles that analyse learning tools, especially in science education (Physics 65.85%, Chemistry 4.88%, and Biology 29.27%) obtained as the data source. The articles are analysed descriptively to determine the effectiveness of using learning tools in science learning to improve student competency. The learning tools in the articles consisted of innovative tools developed (72.5%) and conventional tools available in schools (27.5%). The learning tools in the articles applied at various levels of education, from elementary school to university. Based on analysis data, the use of learning tools was 100% effective in support science learning, characterized by an increase in student competence after the use of tools in learning. Competencies that developed through the use of learning tools are knowledge (53.3%), attitude (20%), skills (18.3%), mindset (1.68%), metacognitive (1.68%), creativity (1.68%), problem-solving (1.68%), and motivation (1.68%). The benefits that reached from the use of learning tools, specifically in science lessons, have implications for improving student competency.