bluuebunny/crossref_metadata_2025 huggingface dataset:
Factors influencing interface design skills
Authors: Harimurti Rina , Nurlaela Luthfiyah , Winanti Elizabeth Titiek , Ismayati Euis
Published: June 2020

This study aims to reveal several factors that affect student’s interface designing skills. There are some variables that influence student’s competencies encompassing motivation and prior knowledge, which determine the success of maximizing student’s cognitive and interface designing skills. This study used quantitative research approach with 39 total university students. The obtained data were analyzed using Path Analysis that measured cause-effect phenomena occurred in a multiple regression. In accordance with the results of SPSS Amos, the value of Chi-Square was 0.236, Df = 1 with p = 0.627. As the p value was more than 0.05, so that the analysis model result was not significantly different from the data. The estimation value between the values of prior knowledge and interface designing skills was very strong (β = 0.912). This indicated that there is a significant influence of prior knowledge on interface designing skills, whereas, there was a weak relationship between other variables. Therefore, the analysis model was precise to portray the relationships between variables and the variable of prior knowledge became the most influential factor on student’s interface designing skills.
Comparison sensitivity of the differential item function (DIF) detection method
Authors: Khoeruroh Ulfa , Retnawati Heri
Published: June 2020

Differential Item Functioning (DIF) or often referred to as bias is a term that is not good, has a racial meaning, suppresses or is too fanatical about the object to be measured. Bias in a test is a test condition that is unfair, inconsistent, contaminated by factors outside the aspects to be tested and misuse of the test. The purpose of this study is to find out which method is the most sensitive in detecting the presence of DIF on items. The methodology used is to study literature from books, journals and study the results of research that has been done. There are many methods that can be used to detect DIF. These methods are the Mantel-Haenszel Method, the Chi-Squared Method of the Lord, the Probability Comparison Test Method, Item Characteristic Curve (ICC) and Extent Method According to Raju.
Development of discovery guided learning module based on character education and competitive education
Authors: Oktavia Yunisa , Atmazaki  , Zaim M.
Published: June 2020

This research entitled the development of an Indonesian language module based on a guided discovery learning method with character education and competitiveness. Background of the research are teaching material and reference books have not been able to make students critical, and the students’ reading culture is very minimal. There are still student characters that have not been shown following existing norms. The study aimed was to produce a module based on the guided discovery learning method with character education and competitiveness in Indonesian language courses that were valid, practical, and effective. The research method used was the research and development method with a 4-D model, namely define, design, develop, and disseminate. The subjects of the research trial were students of the technical study program 2018/2019 UMRAH academic year. Based on the results of the validity test of 88.31%, the effectiveness test was 9 students with grade A in the value range of 3.51–4.00, practicality test by lecturers was 88.22% and module practicality test by students were 84.52%. Based on the results of data analysis, it showed that the module was valid, effective, and practical to be used by students in understanding lecturing material in university.
Comparison of linear and quadratic bi-response semiparametric regression models using spline truncated
Authors: Khalil A A , Budiantara I , Zain I
Published: June 2020

Semiparametric regression is a regression model consisting of two components, namely the parametric and the nonparametric component. The parametric component is a component with curves are known and the nonparametric component is a component with unknown shape of the curve. Bi-response semiparametric regression is regression analysis which has two response variables with the combination of parametric and nonparametric curves. The purpose of this research is to compare the bi-response semiparametric regression model using spline truncated with component parametric linear and quadratic. In this research, the method that used for the estimation parameter is WLS (Weighted Least Square) and the selection of optimal knot points is done by looking at the minimum GCV (Generalized Cross-Validation) value. WLS is minimizing partial derivative based on a parameter in the model. Each the linear bi-responsese semiparametric regression and quadratic bi-responsese semiparametric regression using spline truncated has two parameters that are parameter for parametric and nonparametric components. The difference between the two models contained in the parametric component of the predictor variable and parameter matrix of parametric component

Y
=
X

β
^

+
T

α
^

is estimator linear bi-response semiparametric regression model and

Y
=
X

θ
^

+
T

φ
^

is estimator quadratic bi-response semiparametric regression model using spline truncated.
Thailand elementary school students’ critical thinking skills in mathematics education
Authors: Dewi Anastasya Kurnia , Slamet St. Y. , Surya Anesa , Syawaludin Ahmad
Published: June 2020

Elementary school students’ critical thinking skills in mathematics education are part of 21st-century learning competencies as stated in the Basic Education Core Curriculum B.E 2551 in Thailand. The study aims to investigate the Elementary School Students’ Problem Critical Thinking Skills in mathematics learning in Thailand. The subjects of this study were students of third-grade Chiang Mai Rajabhat University Demonstration School with a total of 32 students. The research instrument used the test of mathematical problems in time material and interview. The research data were analyzed qualitatively descriptive. The results showed that students’ mathematical critical thinking skills were best at reading the time in the form of an analog clock that is equal to 72%; on the subject matter the difference in the time and night time marks is 63%; while the problem of drawing time and night time marks is 51%. The conclusion of this research is the mathematic problem solving-skills in third-grade students in Thailand hasn’t been optimal. The results of this study provide information about the ability to solve mathematical problems in elementary schools that still need to be improved. Future research can be directed at improving the process of mathematical problem solving skills in elementary schools.
Developing a model of teaching patterns recognition based on sorting predict-think discovery for children aged 5-6 years
Authors: Ulni Elvira Khori , Suparno
Published: June 2020

This study aimed to: (1) determine the feasibility of concept of pattern learning model based on sorting predict-think discovery, (2) determine the effectiveness of concept of pattern learning model based on sorting predict-think discovery. This research implemented several steps developed by Borg & Gall. The research subjects consisted of teachers and 172 children in 9 kindergartens in Sleman, Yogyakarta. The data was collected by using expert validation sheets, teacher questionnaires, and observation results. The data was obtained from5 treatments and time series. The results revealed that: (1) the results of the development of pattern learning model based on sorting predict-think discovery were very feasible to use, (2) pattern learning model based on sorting predict-think discovery is effective in developing children’s ability in recognizing pattern. The effectiveness of pattern learning model based on sorting predict-think discovery was revealed by the significant improvements, after conducting five treatments for children 5 to 6 years old. The average ability of children to recognize linear patterns was 3.36, while the average ability of children to recognize cyclic patterns was 3.17, and the average ability of children to recognize hopscotch patterns was 3.03. Hence, the ability to recognize hopscotch patterns showed a slight increase. This happened since most children still have difficulty in memorizing, especially in drawing and creating patterns. Hopscotch patterns were patterns that have never been introduced and taught by teachers to children. Furthermore, all of children’s abilities to recognize patterns had improved.
Auxiliary information based maximum generally weighted moving average (AIB-MaxGWMA) control chart
Authors: Aziza I F , Mashuri M , Irhamah
Published: June 2020

Product quality has a relationship with customer satisfaction. Therefore, the company always strives to maintain the product quality. The effort can be made by the company to maintain product quality is monitoring the production process. One of the tools used to monitor the production process is the control chart. In process monitoring, there are two parameters are observed in the process that are mean and variance. The univariate process monitoring is only carried out on a study variable and only using the information on the corresponding variable. However, in this study, need to monitor process mean and variance simultaneously on a study variable that requires information on study variable and information on auxiliary variable using Auxiliary Information Based Maximum Generally Weighted Moving Average (AIB-MaxGWMA). Besides that, in this study, compare AIB-MaxGWMA with the MaxGWMA control chart to know the effect of adding an auxiliary variable in process monitoring. The performance of these control chartss is evaluated using out of control Average Run Length (OC ARL), where OC ARL is the average number of samples needed to detect a particular shift. The result of this study is AIB-MaxGWMA control chart has a smaller OC ARL than the MaxGWMA control chart which showed that the AIB-MaxGWMA control chart is more sensitive or faster than MaxGWMA control chart to detect a shift. In further study, we recommended to enhance the performance of the AIB-MaxGWMA control chart by extending the current work to the Auxiliary Information Based Maximum Multivariate Generally Weighted Moving Average (AIB-Max MGWMA) control chart, so it is possible to monitor the mean and variance process simultaneously in multivariate case (at least two quality characteristics).
Modelling Return on Assets (ROA) using nonparametric regression spline truncated for longitudinal data
Authors: Ramli Mustain , Ratnasari Vita , Nyoman Budiantara I
Published: June 2020

Nonparametric regression is one of the statistical methods used to see the relationship between response variables and predictor variables with unknown curves. The method often used in estimating the curve of nonparametric regression is the spline method. Spline is one of the nonparametric regression approaches that have very specific and very good statistical and visual interpretations. Spline truncated nonparametric regression is not only used to modelling data with cross-section type but can be used to modelling longitudinal data. Longitudinal data is data whose observations are repeated on each subject within a certain time. In this research, the modelling of Return On Assets (ROA) will be based on the factors that influence it with using 30 subjects of go public banks listed on the Indonesia stock exchange during 2012-2018 using nonparametric regression spline truncated for longitudinal data, with the weighting matrix using the variance-covariance matrix of errors. Based on the analysis data that has been done by using the weighting matrix of the error variance-covariance matrix and one-knot point with 14 Increments, the best model is obtained, namely using the weighting matrix based of the error variance-covariance matrix one-knot point with the smallest GCV value of 15.12 with MSE value of 0.739 and R
2 value of 85.56%.
Analysis of mathematical critical thinking ability in student learning style
Authors: Purwanto W. R. , Waluya S. B. , Rochmad  , Wardono
Published: June 2020

This article aims to analyze mathematical critical thinking skills on student learning styles. Mathematical critical thinking skills can be developed through the character of the learning styles possessed by each student in learning mathematics. Learning can be maximized by knowing the learning styles of students and continued with the learning process by means of one way communication but must go through a process of interaction that is two way communication. This research was carried out at SMP Negeri 3 Jekulo in the odd semester 2019/2020 school year using the comparative-associative explanative research method. From the research results obtained that: 1) There are differences in learning outcomes in terms of mathematics learning styles of students. 2) There are differences in mathematics learning outcomes in terms of students’ mathematical critical thinking skills. 3) student learning styles do not affect students’ mathematical critical thinking abilities From the results of these studies indicate that every student, both those who have auditory, visual, or kinesthetic learning styles have different mathematical critical thinking abilities.
Studies of Bacillus subtilis NAP1 to degrade BOD, COD, TSS, and pH: The indigenous bacteria in Indonesia batik wastewater
Authors: Fidiastuti H. R. , Lathifah A. S. , Amin M. , Utomo Y.
Published: June 2020

Batik is an industry that is quite popular in Indonesia. Batik has been declared as one of Indonesia’s cultural heritage and is recognized by UNESCO. Batik production is recorded to always increase every year. Unfortunately, the batik industry in Indonesia is dominated by many small industries with limited fund management. This makes the environmental aspects and waste disposal neglected. Through this research, study and isolation were carried out to explore the potential of indigenous bacterial isolates that can biodegrade dyes in batik along with other physical parameters of waste. A sample that contained wastewater and sediment from batik industry are collected and cultured in 1000 ml Busnall Hass medium which olive oil-enriched and put at the shaker condition at 150 rpm until 6 days at 30°C. Identification of the isolates examined for their morphological, physiological and biochemistry test. Bacillus subtilis is one of the indigenous isolates from this research. This study aimed to determine the ability of B. subtilis to reduce BOD, COD, TSS, and pH in batik waste and present the results of the DNA analysis of B. subtilis. Based on the research that has been done, it can be concluded that the molecular identification of bacteria through analysis of the 16S rDNA gene fragment sequence, the bacteria that play a role in the degradation of dyes is Bacillus subtilis strain NAP1 with an average similarity level of 93%. B. subtilis NAP1. B. subtilis NAP1 isolate offers the potential for future bioremediation of batik wastewater.
Scientific reconstruction of local plants as the basic materials of Batik Natural Dyes
Authors: Tresnawati N , Saleh I , Sudarmin  , Wardani S
Published: June 2020

The Ciwaringin batik has different features compared to other Cirebon Batik Tulis. It has a unique motif and soft batik color produced from natural dyes. This research aims to reconstruct the knowledge of the community in using local plants as basic material of natural dyes at Ciwaringin, Cirebon, becomes a scientific knowledge. This research was qualitative descriptive research. Data were collected through observation, in-depth interviews, discussion with batik artisans, documentation, and literature study. Data were analyzed by using verification, reconstruction, formulation, conceptualization, and documentation, to obtain scientific knowledge. The subject of this research is the batik artisans of Ciwaringin batik. The result showed that Indigenous knowledge to utilize the local plant as a natural dye of batik by Ciwaringin community is unique local wisdom to maintain environmental balance. Their scientific concepts that have been identified and documented systematically are scientific knowledge that has not been yet formalized. The cause and effect relationship was known through a verification process and then were reconstructed and conceptualized into formal scientific knowledge. The scientific knowledge can be used as a source of culture-based science learning in schools called ethnoscience. The implications of this research are environmental conservation and the increasing value of local wisdom.
Characterization of morphological changes on modified sugarcane bagasse with potassium hydroxide
Authors: Sunarsih S , Andaka G , Wahyuningtyas D
Published: June 2020

In-depth research is needed to determine the characteristics of sugarcane bagasse as biosorbent. The aims of present work to determine the morphological changes of modified sugarcane bagasse. Modified sugarcane bagasse (MSB) is made by soaking it in a KOH 0.1 N solution overnight, filtered and rinsed with distilled water and neutralized with CH3COOH 1%. After drying and sieving with a size of 60 mesh, MSB is interacted with Fe solution. The change in MSB morphology was analyzed by comparing IR spectra and SEM images of sugarcane bagasse SB, MSB and MSB samples that have adsorbed Fe. The SEM image and IR spectra of products showed that the addition of KOH and adsorption of Fe on MSB did not cause damage to cellulose and hemicellulose structures. Significant changes in absorption bands occur at 1,725 cm−1 wave number which shows changes in the carboxylic group and is thought to bind Fe. Other changes occurred at wave number 1,247 cm−1, 1,604 cm−1, 1,515 cm−1 and 1,458 cm−1 which are typical for lignin. The SEM image also supports the partial dissolution of lignin.
Introduction of the Surrounding Environment to Stimulate Naturalist Intelligence of Early Childhood
Authors: Utami Winda Sherly , Rohman Arif , Islamiyah Roudlotul
Published: June 2020

The purpose of this study is to stimulate the naturalist intelligence of early childhood through the introduction of the surrounding environment. The sample in this study was 10 children aged 5-6 years in group B in a kindergarten in Padang. This research uses a quantitative approach with a pre-experimental type and the design used is one group pretest-posttest. Data collection was obtained from observation and documentation, then the data was processed using paired sample t-test analysis techniques. The results showed that the introduction of the surrounding environment can stimulate the naturalist intelligence of children aged 5-6 years. This is known from the results of the paired sample t-test obtained, where the significance value of 0.025 is smaller than the error level of 0.05 (0.025 <0.05). Based on these results it can be stated that Ho is rejected and Ha is accepted which means the child’s naturalist intelligence increases with the introduction of the surrounding environment.
Creative thinking profile of junior high school students on learning science
Authors: Trisnayanti Y , Ashadi  , Sunarno Widha , Masykuri M.
Published: June 2020

Creative thinking is one of thinking skills such as facilitating individuals to learn to realize their imagination, providing opportunities to think, express their ideas, and get new information. Middle school students must be trained in the ability to think from the beginning of learning science. Creative thinking is needed through new ideas. The purpose of this study is to identify the ability to think creatively through Torrance indicators consisting of fluency, flexibility, originality and elaboration. This type of research is a quasi-experimental with one group pretest-posttest. Data collection methods use questions and questionnaires for creative thinking skills. Data analysis techniques using quantitative descriptive. Results Show that creative thinking on the Fluency profile indicator (X1) is 75%, Flexibility (X2) is 70%, Originality (X3) is 60%, Elaboration (X4) is 62%. The percentage of originality indicators (X3) has the lowest score compared to other creative thinking indicators. The culture of learning, especially science, still relies on how to understand concepts, principles, and theories and has not become a means to empower students’ creative thinking skills. Therefore for further research needed a creative problem solving model that can empower creative thinking skills. One of them is the creative problem solving (CPS) model.
Determination of robust weights hidden layers on backpropagation algorithm to analyze coefficient drag high-speed train
Authors: Adityo Suksmono , Hendrato  , Sucipto  , Irfan Ansori
Published: June 2020

In this research, we developed a method using backpropagation to analyze the coefficient drag of high-speed trains. Analyzing coefficient drag using a backpropagation algorithm has more benefits, especially in cost and time, than using computational fluid dynamics. Computational fluid dynamics need sophisticated software and hardware. It needs much time to get a convergent result as well. We used 2D coordinates longitudinal profile nose of the high-speed train as an input of the backpropagation algorithm. The weights between hidden layers and input layers and between hidden layers and output layers, respectively, were modeled as matrices that were formed from the iteration process. The coefficient drag differences, between backpropagation algorithm and computational fluid dynamics analysis, from each iteration, were used as a correction factor to form robust weights hidden layers matrices. The results of this research showed that training in the backpropagation algorithm can obtain robust weights of hidden layers that have been known from Mean Sum Square Error in an exercise that is small enough. Because of the limited time to finish this research, we only trained and exercised nine models instead of a thousand models. Robustness weights that are resulted in this research are expected to contribute to accelerating a coefficient drag prediction of high-speed train accurately. To improve this proposed method, 3D coordinates of the nose’s surface of high-speed trains and many more 3D models are needed.
The exploration of mechanistic reasoning ability for high school students in static fluids
Authors: Nooritasari D D , Kusairi S , Wisodo H
Published: June 2020

The study aims to explore the mechanistic reasoning abilities of high school students in a static fluid material. This research was survey research using mixed-method. The subjects were 95 students of High School in the city of Batu and Malang. The instrument consisted of 5 question descriptions that were valid and reliable. The results showed the student’s mechanistic reasoning abilities were still in the moderate category. It was found that students had difficulty in analyzing mechanically to connecting physical phenomena with static fluid concepts. Most students mistakenly interpret the principle of hydrostatic pressure and Archimedes’ law. Research provides practical benefits on the concept of static fluid, especially regarding the mechanistic reasoning of students’ static fluid. The same mistake in each student can indicate a misconception that is difficult to remove. More effort is needed to master the concepts deeply to have good mechanistic reasoning abilities.
A quantitative approach to investigate downpour condition of distillation column using gamma beam radiation
Authors: Ningsih F R , Gama W N , Wibisono
Published: June 2020

The area underneath the downcomer, part of distillation column is called the downpour area. If a tray deck troubleshoot like corrodes, it often first holes through in the downpour area. This will cause flooding due to the downcomer back up. An investigation of the crude distillation column was performed using an integrated system of photomultiplier detector and collimated gamma beam radiation. Gamma beam penetrated the object material as a transmitter of the radiation signal and will be accepted by the detector as its receiver. The main construction of this distillation column consists of 33 trays where each tray has two downpours and an accumulator. Distillation can be used to separate multi-component mixtures of crude oil. Many variables such as column pressure, temperature, size, and diameter are determined by the properties of the feed and the desired products. The measurement utilizes 75 mCi gamma activity and panoramic collimation design of the photomultiplier detector. This two equipment are aligned oppositely, and set on different four orientations scans, in order to obtain the condition of downpour system at each tray. Resolution scan of 5 cm each step from the bottom level to 34 m height. The duration time to measure radiation intensity is 3 seconds for each step. The quantitative result indicates abnormal flooding on the bottom segment tray #1 to #4. Abnormal condition is also identified as collapse tray, at tray #6. The quantitative approach has successfully determined the downpour condition in the distillation column.
The efficiency and effectiveness of fins made from two different materials in unsteady-state
Authors: Purwadi Petrus Kanisius , Seen Michael
Published: June 2020

This paper describes the calculation of the temperature distribution on the fins, the rate of heat flow released by the fins, the efficiency and effectiveness of the straight fins in the unsteady-state. Calculations are performed using numerical computational methods. The cross section of the fins has a capsule-shape. Fins are made of two different metal materials. The heat-transfer that occurs in fins only occurs in one dimension, namely in the x direction, or perpendicular to the base of the fin. The method used is an explicit finite different method. This paper also explains the influence of fin material on the value of temperature distribution, heat flow rate, fin efficiency and effectiveness. Temperature distribution, heat flow rate, efficiency and efficiency of fins on fins that have two materials with different materials, have different values. This difference is due to material properties of fins such as: material density, specific heat and thermal conductivity. Research can be continued for various fins and cross sections, which are composed of several different materials, according to the needs of the era. Research can also be developed by using boundary conditions which have a fin base temperature that changes with time or receives heat flux.
Analyzes the effect of temperature on characteristics of crude oil permittivity sensor based on Interdigital Capacitors (IDCs)
Authors: Rachmanita R E , Rudiyanto B , Ahmadi H , Seetawan T
Published: June 2020

This study aims to analyze the effect of temperature on characteristics of crude oil permittivity sensor based on interdigital capacitors (IDCs), including linearity, repeatability and hysteresis. IDCs have been fabricated using the DC Magnetron Sputtering method in three designs with different electrode materials and the same electrode configuration. The electrode materials used silver (Ag), copper (Cu) and molybdenum (Mo) deposited on a FR-4 PCB substrate with a thickness of 1μm. The electrode configuration each design is 15 mm electrode length, 0.5 mm electrode width, 0.5 mm electrode distance and 40 electrodes number. The crude oil was tested at a temperature range of 30 - 70°C. The measurement system uses a PM6303A automatic RCL Meter at a frequency of 1 kHz. The sensor linearity test results showed an increase in the sensitivity value of the IDCs Ag, Mo and Cu sensors when the temperature was more than 50°C. The repeatability sensor test results showed that IDCs made from Ag had the highest measurement precision with a value of %repeatability is 2.5%. The hysteresis test results showed that the design IDCs made from Ag have high stability at high and low temperatures.
Development of Liquefied Petroleum Gas (LPG) leakage detection wheeled robot on horizontal pipes based on Arduino Uno
Authors: Budianto A , Muhtadan  , Dipta I M Y , Iman A N
Published: June 2020

LPG utilization need more attention to safety aspects of human, environmental and equipment. This research aims to develop a wheeled robot which is capable of detecting LPG leaks in horizontal pipes by data acquisition via wireless internet, so that it is useful to facilitate human work in determining LPG leak points on horizontal pipes. The controller of this robot is Arduino UNO and equipped with sensors. The sensor measurement data is acquisitioned using the Node MCU module to the Blynk application as an interface application. This robot has an emergency stop feature on the Blynk application. The final results of this research are LPG leak detection robots on horizontal pipes which can provide information on leak points based on gas sensor measurement data and rotary encoder installed on robots with acquisition via wireless internet and data storage on MicroSD. The robot is equipped with buzzer indicator that will sound when a leak is indicated with a gas concentration of more than 30% on one of the gas sensors. Based on the results of final test of the robot, the average value of the leakage point distance obtained is +8.7 cm.
Engineering model development using Fuzzy Logic for wireless protective devices
Authors: Afandi A.N. , Kurniawan A.C. , Aji P.W. , Irham F. , Sendari S.
Published: June 2020

Operationally, the distribution of electricity faces various technical limitations and environmental conditions during operations, on the other hand, it also bears the increasing need for electrical energy. Therefore, the system is required to provide high service by considering various disturbances that occur. Thus, an electric power system requires a protection system that is reliable and sensitive to various types of disturbances, and it has a fast response. In this work, the study is aimed to develop conventional protection devices by implementing intelligent systems based on fuzzy logic. The use of fuzzy is intended to support decision making by considering the voltage, current and temperature of the cable. The results show that the device developed can react quickly and cut off electricity. In addition, it can also respond to the types of interruptions that exist. Moreover, it also avoids damage devices installed on the network.
Analysis of mathematical problem solving based on stages Newman in equality and inequality one variable
Authors: Swari C D V S , Mardiyana  , Indriati D
Published: June 2020

Problem-solving is one of the purposes of learning mathematics. According to Newman, problem-solving consists of five stages, (1) reading, (2) comprehension, (3) transformation, (4) process skill and (5) encoding. The purpose of this study is to analyse students’ problem-solving abilities based on Newman’s steps for the topic of linear equality and inequality in one variable. The type of this research is qualitative descriptive. The subjects of this study were 8 students from 8th grade at SMP Negeri 2 Kebakkramat, which was taken by purposive sampling. The data was collected by test and interview. The results of this study are (1) the stage of reading, there were 16.67% students who could not write a complete mathematical sentence (2) the stage of understanding, there were 4,17% students could not write the question of the problem, (3) the stage of transforming, there were 75% students who still cannot inform the steps of the plan of completion that will be used in writing, (4) the stage of process skills, 33.33% students who made mistakes in understanding the concept and changing mathematical sentences, (5) the stage of encoding, 8.33% students who did not write the conclusion.
Enhancement higher order thinking skills in algebra by The PINTER mathematics learning model
Authors: Kurniawan Heru , Budiyono  , Sajidan  , Siswandari
Published: June 2020

This study aims to determine the enhancement of students’ high-level thinking skills in algebra material through the application of the PINTER mathematics learning model. The PINTER mathematics learning model was developed with the learning stages: Presentation to real life, Investigation, Team Activities, Explanation & Reasoning, and Reinforcement. This research instrument uses tests to determine the effectiveness of learning, observation to see the feasibility of the model, practicality questionnaires to determine whether the model is easy to apply, Practicality questionnaires to determine whether the model is easy to apply, and student questionnaire responses to determine student responses to the learning process. This research was conducted in 4 Junior High School (SMP) in Purworejo Regency. The stages of the study were carried out in 5 meetings where each meeting was reflected and corrected to be carried out at the next meeting. Research results show: 1) The PINTER mathematics learning model is effective for improving students’ high-level thinking skills on algebra material, 2) The PINTER mathematics learning model is practically or easy to apply by teachers, 3) the PINTER mathematics learning model gets good responses from students. Thus, PINTER’s mathematics learning model has the potential to be applied to mathematics learning, especially in efforts to enhance higher-order thinking skills.
The effect of bullying towards students grade IX learning achievement on mathematics
Authors: Afifah Indah Indi , Jaedun Amat
Published: June 2020

This research aims to identify the effect of bullying on students’ grade IX Mathematics learning achievement. This research adopted a quantitative method and used a descriptive approach. The subjects of this research were students grade IX of SMP Negeri 2 Narmada in the academic year of 2019/2020 with the total number of 88 students. In collecting the data, there were two resources, namely primary and secondary data, which were obtained through a questionnaire and the students’ Mathematics’ scores. The questionnaire was given directly to the students, and their mathematics’s score was collected from their report cards in grade VIII. The collected data was analyzed by using the Anova test. Based on the analysis of the data, the result shows that there are differences in students’ Mathematics’ achievement based on the intensity of them receiving the bullying. The students who have significant differences in their mathematics achievement are those who were almost never and were rarely got bullied. Furthermore, it is known that the students who were rarely get bullied have the best performance compared with those who have never get bullied and those who are often get bullied.
Analysis of mathematical creativity in mathematics learning is open ended
Authors: Isnani  , Waluya S.B. , Rochmad  , Wardono
Published: June 2020

The ability of mathematical creativity is needed by every mathematics education student. Mathematical creativity is an important part of Mathematics education. But the mathematical creativity of most Mathematics Education students is still low. Therefore, mathematical creativity is needed for students in Mathematics Education, especially for students who are studying Real Analysis courses. Based on the results of the Open-Ended Real Analysis course, it can be seen the quality of the students’ mathematical creativity. The purpose of this study is to analyze the location, causes, and types of student errors in doing Open-Ended Real Analysis test questions through the use of the Newman Error Analysis (NEA) medium. Newman Error Analysis includes Reading Error, Comprehension Error, Error Transformation, Skill Error Process, and Encoding Error. This research is a type of qualitative research. The subjects of this study were students taking Real Analysis courses in the Mathematics Education Study Program at Pancasakti University, Tegal Indonesia. The research subjects were 64 students. The results showed that students in doing the Open-Ended Real Analysis test questions were still confused using the theorem that was right to use. It means that students in the transformation process discuss problems and the skill process is still lacking. This is by the five types of errors / Newman Error Analysis described by experts in Mathematics Education. The new findings in this study are errors of carelessness not working on problems, and misconceptions.
The analysis of learning obstacle of mathematics belief
Authors: Kurniasih M D , Waluya S B , Rochmad
Published: June 2020

Mathematical beliefs are essential to be improved, especially for mathematics education students, to be more optimistic in overcoming difficulties. Accurate beliefs affect how students “welcome” mathematics lessons. However, the reality is that many mathematics education students still think that mathematics is an ambiguous, abstract, complicated, formulaic subject so that they experience excessive anxiety when learning mathematics. This study aims to knowledge and analyses the learning barriers faced by prospective teacher students in developing mathematical beliefs at FKIP UHAMKA Jakarta. The instrument used was a belief questionnaire for preservice students. This study focuses on the description of 3 (three) components of mathematical belief, namely the object of mathematics education, class context and itself.
Profile of multi-modal representation ability of junior high school students on science material in Sleman district
Authors: Chusni M M , Suranto  , Rahardjo S B , Saputro S
Published: June 2020

This study aims to determine the profile of multi-modal representation ability of junior high school students in science material in Sleman district. The method used in this research is a survey with a quantitative approach and document study with a qualitative approach. The object of research is 10 junior high schools with a total of 1,555 students in the Sleman district. The data used are the results of the national examinations on science learning in 2019 from the Education Assessment Center, Ministry of Education and Culture Republic of Indonesia and 40 items of the national exam documents on science subjects. The results reveal that the ability of student representation on the type of verbal-verbal questions was 50.45%, verbal-visual by 78.14%, verbal-symbolic by 66.03%, verbal-mathematical by 50.45%, visual-verbal by 72.71%, visual-visual by 76.25%, visual-symbolic by 81.57%, and visual-mathematical by 61.55%. From these results it can be concluded that the lowest student representation ability in the type of verbal-mathematical, verbal-verbal, and visual-mathematical problems.
The role of problem solving model integrated with collaborative to increase student’s learning outcomes on buffer solution
Authors: Suyanti Retno Dwi , Sinaga Eli Maitya Rahayu Br , Ratu Evina D
Published: June 2020

This research aims to determine whether there are differences in student learning outcomes learned using the problem Solving integrated with collaborative learning model compared to students who are taught by the conventional learning model on the subject of buffer solution. The sample was determined by the random sampling which took 2 classes which were used as the experimental class. This study used the quasi-experimental method. Test that use valid instruments and reliable (0.814). Based on test data requirement, showed that pretest and posttest value of control class and experiment class has been normal distributed and homogeneous. Hypothesis test with significant level 0.05 to increased student’s learning outcomes has been got tcount > ttable, its meant Ha accepted that student’s learning outcomes that has been learned by problem solving integrated with collaborative model higher than student’s learning outcomes that has been taught with conventional model. The result of observation sheet show that the learning process based on Lesson Study in this research is obtained that the student are less in saying the opinion just 75% of the student that stay saying the opinion in the class. While there are 83% of students that working together in “U” form seat.
Mathematical representation ability using website for learning transformation geometry in a teacher education classroom
Authors: Asnawati S , Dewi ILK
Published: June 2020

The importance of mathematical representation ability is help student to describes thinking processes that has be done by students in order to understand concept, operation, and student ideas. Seeing the importance of student’s mathematical representation abilities in learning transformation geometry, the use of websites is expected to help students to illustrate their ideas. The purpose of this research is to find out the difference between learning with using website and learning without website. The population of the study were all students of grade II of 2 classes. Sample taken with purposive sampling, one class is experiment class and one other is control class. Data were analyzed using descriptive statistical and t-test. The result showed that achivement of mathematical representation is difference between learning using and without website.
The effectiveness of using Edmodo based e-learning in the applied mechanics course
Authors: Wibowo W , Astriawati N
Published: June 2020

This study aims to investigate: 1) The differences in learning outcomes between the cadets who were taught by using Edmodo-based e-learning and those who were taught by using face-to-face conventional instruction; and 2) The effectiveness of using Edmodo-based e-learning on learning outcomes of cadets. This study was quasi-experimental research involving 39 cadets of the Technica Study Program in the even semester in the academic year of 2018/2019. The assessment was gained from the learning outcomes of the cadets before the treatment (pre-test) and after the treatment (post-test). The data were then analyzed using a t-test to determine differences in the cadets’ learning outcomes and n-gain test to determine the effectiveness of using Edmodo based e-learning in learning outcomes compared to the use of conventional face-to-face instruction. The results of this study showed that: 1) There is a significant improvement in the learning outcomes of the cadets who were taught by using Edmodo-based e-learning compared to those who were taught by using conventional face-to-face instruction with the post-test score of 92.89 for the experimental class and 78.35 for the control class, and 2) The use of Edmodo based e-learning in the Applied Mechanics course was considered quite effective as the value of the n-gain test reached 75.82% for the experimental class. As the use of Edmodo-based e-learning has a very positive impact on improving the learning outcomes of the cadets, this learning media is feasible to be applied to support the learning process.
The Effect of Learning Environment and Learning Motivation for Vocational College’s Employability Skills
Authors: Widiyanti  , Marsono  , Edy Duwi Leksono , Rifqi Muhammad Riza
Published: June 2020

This study aims to determine the effect of learning environment on the achievement of employability skills, determine the effect of learning motivation on the achievement of employability skills, and determine the effect of learning environment and learning motivation on the achievement of employability skills. This research was conducted at the Pandaan Textile Vocational School. This study uses the ex post facto method. Based on the results of data analysis, it is concluded that there is a significant effect of the learning environment on the achievement of students ‘employability skills, there is a significant effect of learning motivation on the achievement of students’ employability skills, there is a significant effect on the learning environment and learning motivation towards the achievement of students’ employability skills.
Development of Science Learning Model towards Society 5.0: A Conceptual Model
Authors: Sajidan  , Saputro Sulistyo , Perdana Ryzal , Atmojo Idam Ragil Widianto , Nugraha Dewanta Arya
Published: June 2020

The development of the world of education is entering a very important period. Not only to provide quality and optimal education services. But it is also an important period that will determine the continuation of education itself. The mastery of abilities and skills needed by the future is the responsibility of the education world. The future with the construction of Community 5.0 requires schools to transform teacher-centered learning into student-centered learning so that students can think critically, deductively, and inductively in learning science in the era of disruption. Learning system through rote learning is not following the learning paradigm, which emphasizes cognitive understanding. Therefore, an appropriate learning model is needed to overcome the problem of the discrepancy of the paradigm of community learning 5.0. As a strategic stage of achieving competence, learning activities need to be designed and implemented effectively and efficiently to obtain maximum results. One research method that can be done to develop a learning model by applying the steps of the Research and Development (R & D) research procedure. Conceptual models that have been developed in welcoming 5.0 are Social Inquiry Complex (ISC), and Creativity-Based Learning Skill Entrepreneurship (CEL-BaDiS).
The effect of using mathematics learning assessment books on higher order thinking skills based towards the ability of assessment instruments arrangement at elementary school teachers
Authors: Surya A , Sularmi  , Istiyati S
Published: June 2020

The purpose of this study is to examine the effectiveness of using mathematics learning assessment books based on higher order thinking skills (HOTS) towards the ability of assessment instruments arrangement at elementary school teachers. It is a quasi-experimental research with nonequivalent comparison-group design. The population in this study were 225 elementary school teachers from Ngawi regency, Sukoharjo regency and Surakarta City. By using a random sampling technique, the sample in this study was 125 elementary school teachers in Ngawi Regency. The technique of collecting the data was obtained through test. In analyzing the data, it applied T test technique with a significance level of 0.05. The results of this study indicate that there were differences in the ability of assessment instruments arrangement between teachers who use HOTS-based mathematics learning assessment books and manual one by tcounts <ttable (-18 <1,657. Therefore, the book can be used as a reference in preparing HOTS-based mathematics learning assessment instruments.
Red Chili Agribusiness and the Risks Faced by the Farmers
Authors: Karyani T , Susanto A , Djuwendah E , Hapsari H
Published: June 2020

Red chili is a commodity with high economic value, yet it has high risks. It can be observed from the price fluctuation as a result of the unstable supply, while it has a high demand from the consumers. In red chili agribusiness, farmers are one of the actors who play a role in the on-farm sub-systems, but their performance is affected by other sub-systems. Therefore, it is important to study the level of the risks, the sources of the risks, and the weakest sub-system in the red chili agribusiness. This research was conducted in Sukalaksana Village, Banyuresmi District, Garut Regency, which is one of the red chili production centers in Indonesia. The research was performed using a survey method with a descriptive analysis technique and a risk analysis. The results showed that the red chili farming possesses high risks, shown by the coefficient of variation (CV) of production risk (CV = 0.69), cost risk (CV = 1.25), and income risk (CV = 2.11). The main source of risks in the red chili farming is weather changes, which make the chilies very prone to pests and diseases. Meanwhile, the weakest sub-system in the red chili agribusiness is marketing sub-system because the farmers have to face a monopsonistic market, namely a middleman, which creates an income risk. Therefore, the farmers need assistances to perform risk mitigation, and there have to be institutional supports to increase their bargaining position.