bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Outcome of Immediate or Delayed Application of a Single-Step Self-Etch Adhesive to Coronal Dentin Following the Application of Different Endodontic Irrigants
Authors: Saber Shehab-El Din Mohammed , El-Askary Farid Sabry 
Published: October 2019

ABSTRACTObjectives: The aim of this study was to evaluate the outcome of immediate or delayed bonding of a single-step self-etch adhesive to coronal dentin after the application of different endodontic irrigants.Methods: Thirty five human molars were used. The coronal dentin was irrigated with either 0.9% physiologic saline (NS), 2% Chlorhexidine gluconate (CHX) or 2.5% commercially used sodium hypochlorite (NaOCl). Compositecylinders were bonded with the coronal dentin using the Clearfil S3 bond, which was applied either immediatelyor after one week storage time following the irrigation procedures. Shear bond strength testing was performed at a cross-head speed of 0.5 mm/min, and the resin/dentin interface was evaluated using SEM.Results: Irrigation with NS, CHX, or NaOCL followed by immediate adhesive application resulted in a reduction in the shear bond strength values recorded and this was statistically significant in comparison with the control group (P<.05). However, delaying the adhesive application resulted in a statistically significant (P<.05) improvement in the shear bond strength recorded in specimens irrigated with NS and CHX only.Conclusions: Delaying the bonding procedures for one week appeared to be beneficial in improving the shear bond strength of Clearfil S3 bond with coronal dentin especially when NS and CHX were used as endodontic irrigants. NaOCL proved to be an incompatible irrigating solution when used prior to the application of such adhesive. (Eur J Dent 2009;3:83-89)
Comparison of the Different Techniques to Remove Fractured Endodontic Instruments from Root Canal Systems
Authors: Gencoglu Nimet , Helvacioglu Dilek 
Published: October 2019

ABSTRACTObjectives: To evaluate the success of certain methods that can be used in the removal of separated instruments from different levels in curved and straight canals.Methods: Instrument removal attempts were undertaken on 63 straight and 30 curved canals containing a pre-fractured instrument using the ultrasonics under the visualization of an operating microscope or conventional methods. In straight canals, a Masseran Kit was additionally used to these techniques. The success of instrument removal in relation to the techniques used and the location of the fragments in the root canal were evaluated. Successful treatment was defined by the removal or complete by passing of the fragments.Results: The overall success rate was found 93.3% with ultrasonics and 66.6% when only conventional methodswere used in curved canals. In straight canals, also the success rate was the highest with ultrasonics (95.2%). This was followed by conventional method (80.9%) and the least by Masserann Kit (47.6%). When the success rate was investigated according to the location of the broken instruments, the lowest rate was found in the apical third of root canal.Conclusions: Location of the fragment and the shape of the root canal influence the success of fractured instrument management. Ultrasonics under the visualization of an operating microscope was found to be an effective removal method. (Eur J Dent 2009;3:90-95)
Solving high order thinking problem with a different way in trigonometry
Authors: Sulistyowati F , Kuncoro K S , Setiana D S , Purwoko R Y 
Published: October 2019

AbstractThis research is a descriptive-analytical study that aims to describe how student solve high order thinking (HOT) problem. The research subject was a student who was chosen based on HOT problem-solving in a non-routine way and took a mathematics course at Science Education of Universitas Sarjanawiyata Tamansiswa Yogyakarta DS Setiana1. Data were collected using observation, documentation and interviews methods, then will be analyzed descriptively. Based on the analysis that has been done, it was found that: (1) the strategy used by the student to solve the HOT problem was obtained from the internet; (2) there are errors when student applied the strategy that has been obtained in solving the HOT problem; (3) the student have difficulties when solving HOT problem in the same way. The results of this analysis are expected to provide a little description for educational activists related to the solving of HOT problem by students.
Improving Students’ Mathematical Problem Posing Ability Using PACE Model
Authors: Afrilianto M , Sabandar J , Wahyudin  
Published: October 2019

Abstract

Mathematical problem posing ability is considered as a necessity for students to support their learning achievement. Some students are good at mathematical problem posing ability; some others are not. To foster mathematical problem posing in students, it is required that an innovative learning model is applied. From so many innovative learning models, one that is considered appropriate to increase the mathematical problem posing of the student is project-activity-cooperative learning-exercise learning model. This is an experimental study using pretest and posttest control groups design. The instrument used tests. The research was conducted in three regular classes of 5th-semester students of mathematics education who involved in a calculus course at IKIP Siliwangi, at a local university in Cimahi. A total of 123 students, comprises three classes A1, A2, and A3. A purposive sampling technique was used to collect data. Based on data analysis, it can be concluded that there exists a different in the improvement of student’s mathematical problem posing ability among those who received PACE model with GeoGebra (PACE-G), PACE model, and direct learning.
Development of basic school mathematic teaching materials to improve the analysis ability of primary teacher education students on innovative learning models
Authors: Rabbani S , Ruqoyyah S , Murni S 
Published: October 2019

Abstract
The background of this study is the lack of ability of PGSD Siliwangi PGSD students to analyze innovative mathematics learning models. The purpose of this study was to improve the analysis and implementation skills of PGSD students regarding creative mathematics learning. The specific target to be achieved in this study is the formation of appropriate and efficient teaching materials in the implementation of elementary school mathematics learning internships. This study uses a quantitative approach and uses a quasi-experimental method. The population in this study were primary teacher education students of IKIP Siliwangi, while the sample consisted from 70 students are divided into 35 students in class A1 class of 2017 as an experimental group and 35 most students in class A2 class 2017 as a control group. The instrument used consisted of a written test regarding learning models, innovative, observation, and interviews. The results show that there is an increased ability to analyze student by using model-model innovative learning better than usual learning.
Mathematical literacy skill of students of Pisa type in the context of coconut
Authors: Utari A , Zulkardi  
Published: October 2019

Abstract
Indonesia has experienced the improvement of the result of PISA despite its lower result besides other countries. Therefore, the result of this study is to find out the mathematical literacy ability of students in using PISA model questions in the context of coconut. This article also describes the ability of students in solving mathematical problems in the context of coconut. This is design research with two development studies types, namely preliminary and formative evaluation, which includes self-evaluation, expert reviews, one to one, small group, and field test. Based on the result of the analysis, the researcher showed that in solving the mathematical problem of PISA model in the context of a coconut tree, students mostly utilized to choose a strategy in solving the problem and communication ability.
Improving of mathematical proficiency and disposition using multi representation approach on vocational students
Authors: Hutajulu M , Minarti E D , Senjayawati E 
Published: October 2019

Abstract
This study aims to examine the achievement and improvement of mathematical proficiency and disposition of vocational students using multi-representation approach. The method used in this study is a quasi-experimental method. The population in this study were all students of class XI in one of the vocational schools in the city of Cimahi, while the sample was chosen by two classes, 1 control class that used the usual approach, one class again, the experimental class using a multi-representation approach. The instruments used were in a set of mathematical proficiency and non-test in aset of a questionnaire to measure students’ mathematical dispositions. All data processing used SPSS. Based on the results of data processing, it was concluded that mathematical proficiency and mathematical disposition of vocational students whose learning using a multi-representation approach were better than the usual approach.
Enhancing students’ mathematical connection by brain based learning model
Authors: Yulian V N , Hayati N 
Published: October 2019

Abstract
Students’ mathematical connection is one of ability that students must have. However, one of the reasons that student’s mathematical connection is still poor is the lack of enthusiasm of students while learning mathematics, and learning that does not give flexibility to students to empower the brain. Therefore, it is necessary to have an alternative learning that can develop students’ mathematical connection. The purpose of this study is to find out students’ enhancement in mathematical connecting ability who worked under brain-based learning model and students’ who worked under expository learning model and the effect of brain based learning model on enhancing mathematical connection ability. This study used a quasi-experimental method. The subject in this research was 49 students from 2 classes in one of junior high schools, in Subang, West Java, selected by applying purposive sampling technique. The instruments used were mathematical connection test and attitude scale. Based on the results it was concluded that: (1) students’ enhancement in mathematical connecting ability who worked under brain-based learning model is higher than that of students’ who worked under expository learning model; and (2) the students’ who worked under brain-based learning model showed positive attitude toward mathematics lesson.
Spatial ability of student in construct volume of the solid of revolution graphic
Authors: Kusumaningrum Betty , Irfan Muhammad , Agustito Denik , Wijayanto Zainnur , Ratih Zuida 
Published: October 2019

Abstract
Visualization ability (spatial ability) is needed in understanding integral calculus. This article discusses changes in the spatial ability of a student in constructing graphs of functions to determine the volume of the solid of revolution after obtaining treatment. The treatment is in the form of questions that encourage the subject to be able to construct the graph correctly. This research is a qualitative descriptive study with a single subject. The subject in this study was 6th semester student of mathematics education study program at one of the private universities in Yogyakarta. The selection of a subject from 44 students was done by giving a question about the volume of the solid of revolution. The subject is asked to constructing the solid of revolution graphic and determine its volume using integral. The selection of subjects by purposive random sampling based on the uniqueness of the answers to the problems given and good communication skills. The results of the study show that giving treatment can help increase a student’s spatial ability gradually. Before getting treatment, a subject is still not right in constructing volume of the solid of revolution graphic. After getting treatment, there is a gradual change in spatial ability.
Structural Equation Modelling (SEM) in predicting student performance factors in mathematics education department at Muhammadiyah University of Prof. DR. Hamka
Authors: Alyani Fitri , Nurafni  
Published: October 2019

Abstract
The research was conducted at University Muhammadiyah of Prof. Dr. Hamka, Jakarta which involved three years academic level students (2012, 2014, 2015) at mathematics education department that have taken seven compulsory subjects. The students’ performance consisted of mid test, final test and GPA meanwhile, the factors which influenced the students’ achievement were gender and education background. This research study, there were seven variables which consisted of independent and dependent variables. Structural Equation Modelling was conducted to analyse the final model in predicting influenced factors of GPA. This research study used SmartPLS software to analyze contribution of each variables to the final outcome and dependent variable. The results of the study provide that gender was significantly influence their performance on their GPA. Education background were not directly influence their achievement in GPA but through mid test. The result study showed that final test was influenced by mid test score.
Students’ mathematical argumentation ability in determining arguments or not arguments
Authors: Indrawatiningsih N , Purwanto  , As’ari A R , Sa’dijah C , Dwiyana  
Published: October 2019

Abstract
Someone who has critical thinking ability can use the exact criteria to evaluate an argument. This engages critical thinking to determine whether a claim or an argument which has been given is correct or not and whether the sentence which has been given is included an argument or not. To determine it, there must be clear evidence and logic explanation. The aim of this study is to investigate the argument in critical thinking ability. The students are asked to determine whether the information which has been given by the researcher is included an argument or not and give the reason. The information that is given by the researcher is in the form of triangle congruent evidence. The subject is the students in mathematics education who consist two people with criteria moderate (female student) and high academic ability (male student). This study is descriptive qualitative research. This result study was the student who had high academic ability was still not able to analyze more detail about an argument so he was called he did not have critical thinking ability. While the student who had moderate academic ability had been able to analyze that the information which was given was included an argument or not and was able to justify it so it could be concluded that she had critical thinking ability. It could decipherable that the student who had high academic ability was not sure understood about an argument.
Junior high school students’ mathematical creative thinking ability based on gender differences in plane and solid geometry subjects
Authors: Purwasih R , Anita I W , Afrilianto M 
Published: October 2019

Abstract
Mathematical creative thinking is the ability of students to find solving ways that are unusual, unique, and have never been found by others. The development of the concept of mathematical creative thinking can make students despair and give up, so that another ability is needed so that they are able to survive and turn their difficulties to be opportunities for themselves to advance. This study aims to determine the mathematical creative thinking ability of class VIII junior high school students in one of the junior high schools in Bandung Barat on the subject to construct plane and solid geometry based on gender differences. The samples are 4 students consisting of two men and two women. Besides that, the discussion of mathematical creative thinking skills for junior high school students is viewed from gender differences, between male and female students in terms of their creative thinking abilities. The instrument of this research is a test of the ability to think creatively and interview. This study is a descriptive qualitative research that aims to describe the ability of creative thinking mathematically in solving problems of plane and solid geometry. The results show that the ability difference between male and female students is that the female students have much better mathematical creative thinking. In addition to gender factors, other factors can also influence the achievement of creative thinking skills; namely, students and teachers’ readiness to learn, students’ basic abilities and knowledge of mathematical concepts. Male students are more detailed in explaining the shape of each space given to the problem.
Mathematical literacy skills students of the junior high school in term of gender differences
Authors: Prabawati M , Herman T , Turmudi  
Published: October 2019

Abstract
Having good mathematical literacy skills is expected to help students solve problems related to mathematics. The focus of mathematics literacy skills on students is the ability to analyze, justify, and communicate ideas effectively, formulate, solve and interpret mathematical problems in various forms and situations. This study aims to describe students’ mathematical literacy skills seen from gender differences. The approach used in this study is a qualitative approach with case studies. The study subjects consisted of two male students and two female students from junior high school students. Data was collected through analysis of student work results and interviews.. Students are asked to convey what they are thinking when solving problems in a given mathematical literacy test. After students finish getting the solution from the problem, the researcher classifies the students’ answers and analyzes them. Furthermore, the data obtained are grouped and analyzed according to indicators of mathematical literacy skills. Male students have good results from each indicator in mathematical literacy ability, namely in the first indicator of the sixth indicator, while for female students have good mathematical literacy skills for the first indicator, second indicator, third indicator, fourth indicator and sixth indicator, except for the fifth indicator, female students have sufficient mathematical literacy skills.
Novel Cu2O gas sensor prepared by potentiostatic electrodeposition on IDE electrodes
Authors: Mikolasek M , Meri J , Chymo F , Ondrejka P , Rehacek V , Predanocy M , Kostic I , Hotovy I 
Published: October 2019

AbstractThis paper introduces a new approach for preparation a gas sensor based on the potentiostatic electrodeposition of Cu2O on interdigitated electrodes. Four Cu2O gas sensors with different deposition charges were prepared from lactate-stabilized copper sulphate on Au IDE electrodes. Prepared sensors were characterised by scanning electron microscopy and electrical measurements in the air and H2ambient. It was found that the key aspect for high gas sensitivity is to achieve an appropriate rate of crystal interconnection between IDE electrodes. Low deposition charge results in an air gap between IDE electrodes, while high deposition charge causes strong, bulk-like interconnection of Cu2O crystals. The low rate of Cu2O interconnection formed by connection of individual crystals, where the conductance is affected by the surface area of the crystals, is shown as a most appropriate sensor. The sensitivity of 3.75 to 1000 ppm H2concentration and 200 °C operation temperature is achieved for the optimised Cu2O based IDE sensor.
Adsorption and detection of microparticles using silicon microcantilevers
Authors: Ombati Nyang’au W , Hamdana G , Setiono A , Bertke M , Xu J , Fahrbach M , Puranto P , Wasisto H S , Peiner E 
Published: October 2019

Abstract
This paper presents a droplet-based method for detecting the mass of fluid-based microparticles. The degree of wettability on silicon-based substrates is therefore investigated for enhanced adsorption of microparticles. Contact angles of 47.3° (pre-treatment) and below 9° (enhanced hydrophilicity upon oxygen plasma treatment) have been realized. Segments of mono-layered particles on the substrate and the possibility of homogenous distribution are also demonstrated. The volume and the surface-contact area of droplets on the substrate have been determined, hence empowering an envisaged optimized design of a particle-well cantilever. The determination of the mass of adsorbed microparticles on the cantilever has also been investigated.
Comparing consumer perceptions of appliances’ electricity use to appliances’ actual direct-metered consumption
Authors: Lesic Vedran , Glasgo Brock , Krishnamurti Tamar , Bruine de Bruin Wändi , Davis Matthew , Azevedo Inês Lima 
Published: October 2019

Abstract
Many strategies for reducing residential energy consumption—including product labelling programs, subsidies for the purchase of efficient devices, behavioral programs that encourage efficient energy use, and others—rely on building owners and end users to make informed investment and operational decisions. These strategies may be ineffective if consumers are unaware of how much electricity is used by different devices in their homes and buildings. This study therefore compares consumers’ perceptions of their appliances’ electricity use to these appliances’ actual direct-metered electricity consumption. Using an online survey, 118 homeowners from Austin, Texas were asked to estimate the energy consumption of six household devices which were monitored in the participants’ homes. Homeowners were randomly assigned to assess their appliance-specific electricity use in terms of energy units (kWh/month) or energy cost units ($/month) for an average summer month. Consistent with previous studies, participants overestimated the energy consumed by their low energy consuming devices and slightly underestimated that of their most energy-consuming device. Results also showed that responses of the experimental groups estimating their consumption in energy units and energy cost units were similar, the accuracy of the two groups’ perceptions was similar, and levels of confidence in the two groups were similar. These results suggest that targeted information campaigns focused on air conditioning energy consumption and device power reduction opportunities could improve consumer decision-making to save energy and reduce demand.