bluuebunny/crossref_metadata_2025 huggingface dataset:
Creditworthiness system with k-means model based z-score
Authors: Maylawati D S , Gerhana Y A , Kusuma S C , Zulfikar W B , Ramdhani M A
Published: November 2019

Evaluation of the creditor’s ability needs to be done before the debtor provides the loan. The purpose of system design in this study is to establish a creditworthiness system by implementing K-Mean based Z-Score. The method of system design that used in this research is Rational Unified Process (RUP). The case study of those research is in the Savings and Loans Cooperative (KSP) at Junior High School 1st Cileunyi, Bandung. K-Means method-based Z-Score is used by the author as a model for solving problems, wherein the author uses three clusters with four parameters that applied to the method. Based on the results of the experiments, the application can classify prospective credits into three groups based on the four parameters. Those three groups among others: “OK” as many as 37 members, “Warning” as many as 28 members and “Bad” as many as 5 members. The results of those groups are used as a credit recommendation to the KSP.
Graphical depiction of three-way association in contingency table using higher-order singular value decomposition Tucker3
Authors: Lestari K E , Pasaribu U S , Indratno S W
Published: November 2019

The anaysis of the association between the variables of a three-way table requires a very different approach to the conventional correspondence analysis techniques. The conventional technique involves by collapsing three-way table into two-way table form. By doing so, no information about three-way interaction among variables. To included interaction among three variables at once, we consider higher-order singular value decomposition (HOSVD) Tucker3. Through the HOSVD Tucker3 decomposition, we can derive marginal of row, column, annd tube categories. Using those marginals, we can easily visualize dependence of the three categories. As a case study, Tucker3 is applied to household data which containing information on race, educational attainment and employment status.
The partition dimension of subdivision graph on the star
Authors: Amrullah  , Azmi S , Soeprianto H , Turmuzi M , Anwar Y S
Published: November 2019

The partition dimension of the graphs is one of the open problems in graph theory. One of the methods which are used researcher is a graph operation, for example, subdivision operations. Let G be a connected graph of order n. The subdivision operation of G is an operation in G that replaces any edge by a path P

k

i+2
for ki
≥ 1 and i ∈ [1, n]. The result graph of this operation is called the subdivision graph, is denoted by S(G(E; k
1, k
2, ⋯, k

n
)). Furthermore, if each k

i
= 1, then the subdivision graph is denoted by S(G). One of the most recent results on the partition dimension of subdivision operation in the general graphs is published by Amrullah, et al 2016. However, the results show only an upper and lower bounds of the subdivision graph partition dimension. Therefore, this paper is devoted to finding the partition dimension of subdivision graph S(G) and S(G(E; k
1, k
2, ⋯, k

n
)) on special star graphs G = K
1,n
.
On the total edge irregularity strength of some copies of ladder graphs
Authors: Ramdani R , Salman A N M , Assiyatun H
Published: November 2019

Let G = (V(G), E(G)) be a graph and k be a positive integer. A total k-labeling of G is a map f: V(G) ∪ E(G) → {1,2, ⋯, k }. The edge weight uv under the labeling f is defined by w

f
(uv) = f(u) + f(uv) + f(v) and denoted by by w

f
(uv) and. A total k-labeling of G is called edge irregular if every two distinct edges have distinct weight. The total edge irregularity strength of G is denoted by tes(G) and defined by the minimum k such that G has an edge irregular total k-labeling. The labeling was introduced by Bača et al. in 2007. In this paper, we determine the total edge irregularity strength of some copies of ladder graphs.
Fuzzy epidemic model in a population having critical density dependent growth
Authors: Amarti Z , Anggriani N , Supriatna A K
Published: November 2019

The epidemic growth model is an important tools used in predicting the future of a population and the spread of disease in the population. An epidemic model is usually formed in a differential equation or a system consisting several differential equations. The biological complexity in the underlying population affects the complexity of the epidemic model. One example of biological complexity is the Allee effect which reflects the critical density dependent of the population growth. In this paper we discuss a Logistic epidemic by considering this Allee effect on the population. Dynamic analysis is performed by determining fixed point and its stability analysis in crisp condition. We found the Basic Reproduction Ratio (BRR) for the model. The properties of the solution of the model are explored by the use of its numerical solution. Since we also consider the fuzziness of parameters and variables in the model, the numerical solution is generated using a modified Runge-Kutta method. This is done to explore the effect of inaccuracy and uncertainty which often occur in epidemiological problems.
Application of semiparametric spline regression model in modelling human development index in 2016
Authors: Amilia S , Herrhyanto N , Puspita E
Published: November 2019

Human development index is one of indicators to determine developed country. According to the data from Indonesian Central Bureau of Statistics in 2016, Human Development Index of Papua, West Papua, and East Nusa Tenggara are lower than others. Therefore, the aim of this study was to analyze the relationship between Human Development Index and four variables such as Life Expectancy, School Life Expectancy, Average School Duration, and Average per Capita Expenditure affecting an improvement of Human Development Index. Data of human development index and 4 variables used in this study was obtained from the article “Human Development Index 2016” published by Indonesian Central Bureau of Statistics. Method used in modelling Human Development Index in 2016 was semiparametric spline regression method. Linear spline, quadratic spline, and cubic spline were models applied in this study, whereas one point of knot was implemented as well. As a result, all variables significantly affected the Human Development Index in Papua, while in West Papua, variables of both Average School Duration and Average per Capita Expenditure related to Human Development Index significantly. In contrast to Papua and West Papua, 3 variables such as School Life Expectancy, Average School Duration, and Average per Capita Expenditure contributed on Human Development Index in East Nusa Tenggara.
Type the title of your paper here mathematical properties of n×n nonnegative matrix: case of irreducible Leslie matrix
Authors: Carnia E , Anggriani N , Gustyana M , Supriatna A K
Published: November 2019

Perron-Frobenius theorem describe five properties of irreducible nonnegative matrix. Leslie matrix is one of nonnegative matrix. Leslie matrix that used in this research is limited to the irreducible Leslie matrix. In previous research has been proven that irreducible Leslie matrix satisfies three properties in Perron-Frobenius theorem by spectral radius. This research completed the previous research, proving that irreducible Leslie matrix has a unique Perron vector and satisfies Collatz Wielandt formula. Leslie matrix is a primitive matrix. It is used to calculate the number of populations in the future. Growth of population is interpreted by value spectral radius of Leslie matrix.
Effect of depth and width of periodic trapezoidal channels to water content in soil: a numerical study
Authors: Solekhudin I
Published: November 2019

Time-independent or steady infiltration problems from periodic furrows are studied. There are variations in the depth and width of the periodic furrows or channels. The problems are modelled using Richards equation. To solve the problems using the Dual Reciprocity Boundary Element Methods (DRBEM), the mathematical model must be changed into a modified Helmholtz equation. Solutions obtained are then compared and discussed to observe effects of the depth and width of the channels to soil’s moisture content.
Complexity analysis of the connected pore structure in 3D porous medium using meandering parameter and permeability
Authors: Rahmi N , Latief F D E , Feranie S
Published: November 2019

The complexity of the connected pore structure of porous media samples has been analysed using meandering parameter and permeability. The meandering parameter and absolute permeability was calculated for four porous medium models, which have porosity of 15%. Porous medium samples are generated by depositing grains of varying radius (10, 15, 20, 25 pixels) that are randomly distributed in a 200 × 200 × 200 medium. The fluid flows of the rock models were analysed on the y-direction. To trace the connected pore inside the porous medium, Simple Neurite Tracer was used which then generated the coordinate of the connected pore path for calculating the meandering parameter. Meandering parameter is calculated by using the definition of the ratio between the sum of the curvaceous angles of the connected pore path to the distance between two facing sides of the sample. Absolute permeability is calculated by simulating the Darcy’s experiment by means of Lattice Boltzmann Method. For the four sample models, it was found that meandering parameter is inversely proportional to the permeability.
Investigation of 3D fractal dimension sensitivity on 3D fracture parameter
Authors: Feranie S , Sasmita D , Latief F D E
Published: November 2019

Box counting fractal dimension has been investigated as 3D Fracture parameters. Geothermal rock fractured and 3D fracture models are characterized its 3D fracture characteristics i.e. aperture, density and intensity. The investigation 3D Fractal dimension as aperture parameter, we use the rock samples and 3D Fracture models that have nearly the same intensity. We found that fractal dimension of 3D fracture has a strongly positive correlation with aperture both for 3D fracture in rock fractured samples and 3D fracture models. Based on this result we conclude that 3D fractal dimension of fracture can be used as parameter of fractures aperture and density. Meanwhile for fractal dimension of 3D fracture as intensity parameter, we use the rock samples and 3D Fracture models that have nearly the same aperture and density. We found that there’s no significant pattern of 3D fractal dimension on fracture intensity of rock samples. For further investigation we generate 3D fracture models. We found that the relation between 3D fractal dimension and 3D fracture intensity is very weak negative correlation. Based on this result, we are unable to conclude that the 3D fractal dimension of fracture can be used as parameter of fractures intensity.
Design of carbon dioxide level measures on peat soil with MG 811 sensor
Authors: Aziz M H , Saptiani P , Iryanti M , Aminudin A
Published: November 2019

The world’s carbon dioxide pollution is already at alarming levels. Carbon dioxide pollution leads to global warming. One of the cause of carbon dioxide pollution is peatland. Indonesia is one of the countries with largest peatland in Southeast Asia. Therefore there is a need for carbon dioxide concentration detector on peatland. Laboratory scale carbon dioxide concentration detector in peat was made. This detector consist of three main parts, namely, the source of carbon dioxide gas, gas barrier and the sensor system. The sensor system is using MG 811 gas connected to the arduino, in which output voltage from the sensor will be converted to ppm (part per million). Carbon dioxide gas from the source flows towards peatland contained on the barrier, and gas concentration will be measured by gas sensor. The carbon dioxide concentration detector was made with a size of 70 cm in length and width 40 cm. This experiment use peatland with 6 and 7 cm of thickness and carbon dioxide concentration detected are 400 – 1800 ppm.
The electrical properties on the plantation fires at Liang Anggang Village in the South Kalimantan in Indonesia
Authors: Iryanti M , Aminudin A , Agustine E , Ardi N D , Asmoro C P , Purnama E , Tayubi Y R
Published: November 2019

Electrical properties were used to analysis soil characteristic such as conductivity electric, resistivity and dielectric permittivity. The aim of this study is characterization of electrical properties at plantation fires at Liang Anggang village, Banjar Regency in South Kalimantan, Indonesia. The geo-electric resistivity of Wenner-Schlumberger configuration was conducted in field with 1 meter electrode spacing. The result of resistivity section which the length is 52 meter varies from 149 to 1436 ohmmeter. In the surface from 0 to 5 meter is higher resistivity (1039 – 1436 ohmmeter) and the lower 5 m is lower resistivity (149 – 752 ohmmeter). Resistivity of plantation fires has high resistivity, because there are many organic matters and less water content moreover those impacts up to 5 meter the depth.
Development of static solar panel equipped by an active reflector based on LDR sensors
Authors: Indrasari W , Fahdiran R , Budi E , Umiatin U , Yusuf N S
Published: November 2019

Solar panels are a very effective source of renewable energy in Indonesia. To increase the output power of solar panels, especially on the static solar panels, a reflector is required as an additional device. This paper describes development of a static solar panel equipped with an active reflector. Five LDR sensors are mounted on the top of the reflector, to detect the highest solar intensity. Meanwhile, a DC motor as a reflector drive system is mounted on the bottom of the reflector. The tilt angle of the solar panel is 450 to the negative x-axis and the reflector is 750 to the positive x-axis. The reflector will move in a semi-circular path, following the direction of the highest solar intensity detected by the LDR sensor. Three different reflectors used to optimize the output power, there are stainless steel, aluminium foil, and mirror. Solar panel with mirror reflector produces the largest output power compared to other reflectors. The output power of this device increases 1.6 times to the solar panels without reflector.
Analysis of meteorological parameters wind speed, temperature, and pressure profiles during Tropical Cyclone Cempaka Dahlia 2017 using time series analysis
Authors: Asmoro C P , Riza L S , Ardi N D , Hikmat  , Amsor  , Tayubi Y R
Published: November 2019

Meteorological parameters such as wind speed, air temperature and pressure have been measured in the Menara Timur, FPMIPA UPI, Bandung, Indonesia during the Tropical Cyclone Cempaka Dahlia (TCCD) from November 27 until December 2, 2017. In this paper, we propose to analyze them by using distance measurement for time series data. The following steps are conducted: data collecting, splitting, dimensionality reducing, and distance calculation. The final results show cluster memberships of the three parameters on 3 time frames: one week before, the TCCD week, and one week after. After doing some simulations, it can be seen that profiles of temperature and pressure at the time frame before and during are similar. However, for wind speed we can see that the profile of the time frame before and after is quite similar compared with the others. In conclusion, the wind speed parameter is strongly affected by TCCP with an increase in the wind speed up to 74% compared by wind speed before TCCP
Problem-based learning skills and reflection skills of biology education students through the problem-based online tutorial
Authors: Sekarwinahyu M , Rustaman N Y , Widodo A , Riandi
Published: November 2019

This study is part of the development of problem-based learning research in plant development using the Gibbs’ reflective cycle and e-portfolio, namely the program implementation phase The Study aims to find out the problem-based learning skills and reflection skills of biology education students. The study conducted in the semester 2018.1 involving 24 biology education students participating in the Plant Development online tutorial. The study was conducted by providing discourse related to differences in Algae and Moss and asking students to carry out problem-based learning processes (PBL) and reflect on what they had done in the PBL process. The instruments used were the rubric of PBL and reflection skills five scales (range 0-4). The results showed that the average PBL skills score of biology education students is lower than their average reflection skills score. Of the six PBL components assessed, the students’ ability to formulate problems is the highest ability, and the ability to answer the problem formulation is the lowest ability). Meanwhile, from the six components of reflection assessed, the students’ ability to conclude is the highest ability, and the ability to provide an action plan is the lowest ability.
Improving scientific argumentation: opportunities and barriers analysis in inquiry-based scientific reading
Authors: Probosari R M , Widyastuti F , Sajidan S , Suranto S , Prayitno B A
Published: November 2019

Reading, as an inseparable part of science inquiry, is a strategy for concept understanding and building knowledge through literature. The purpose of this study was to examine opportunities and barriers of the development of 2nd-year college students’ scientific argumentation through reading activity. The practice of argumentation, as part of scientific communication, is conducted over one semester on continuous topic using inquiry-based reading instructions. This collaborative action research was held in one of the science education study programs in Central Java, Indonesia. Data sources included class discussions concentrated on individual presentation that occurred in nine weeks periods, students’ portfolios, questionnaires, and lecturer field notes. The opportunities and barriers of inquiry-based reading were analysed through Rasch analysis model. The results showed that there are many students who lack understanding of scientific reading strategies and how to use the information obtained to build strong arguments. Scientific reading culture is still very low, even though through habituation this can be resolved. Teaching strategies for doing inquiry-based reading in practice are discussed and the implications of these findings were highlighted in relation to develop sharper insight of scientific argumentation in science classrooms.
Enhancing the quality of future teaching practise by increasing scientific attitudes and reducing misconceptions of pre-service elementary school teachers through conceptual change model
Authors: Toto R W , Kurniawati W , Mustadi A
Published: November 2019

This study was aimed at increasing scientific attitudes and reducing misconceptions of 39 pre-service elementary school teachers (PSESTs) at PGRI University of Yogyakarta by implementing the conceptual change model (CCM). Scientific attitudes scales (SAS) and misconception tests (MT) were administered to PSESTs. Observations and documentations were conducted to record the implementation of CCM as well as PSESTs’ attitudes and behaviour. Data analysis techniques were the descriptive statistic as a quantitative analysis and descriptive qualitative as a qualitative analysis. The average scores of scientific attitudes increased from 72.8 in the initial condition to 77.1 in Cycle I, whilst the average scores of scientific attitudes increased from 77.1 in Cycle I to 81.4 in Cycle II. The overall misconception incidences reduced from 49.8% to 5.6%. The research results clearly showed that CCM increased scientific attitudes and reduced misconceptions of PSESTs’. The two objectives, the increase of scientific attitudes and reduction of misconceptions, are attempts to enhance the quality of pre-service teachers’ upcoming teaching practise. Consequently, CCM is one of the choices that can be chosen by lecturers to fulfil both objectives.
Development of digital product assessment instruments for preservice teacher’s biology
Authors: Maryanti S , Kurniawan D T , Malik A
Published: November 2019

This researched purpose to determine the characteristics of assessment instruments for digital teaching materials to assesses the quality and feasibility of digital teaching materials. Assessment instruments for digital teaching materials that are reviewed according to evaluation experts, media experts and linguists. This development research uses the ADDIE model which consists of the stages of analysis, design, development, implementation and evaluation. The subject of the instrument assessor was a lecturer in the education evaluation course and three expert lecturers consisting of one evaluation expert, one media expert, and one linguist. Review and input from this expert lecturer as instrument validation. Assessment instruments that have been developed have various characteristics. The findings obtained (1) the products produced in this research and development are instruments for evaluating digital teaching materials for biology learning. (2) Based on the validation results obtained a score of 4 which is included in the criteria both with minor revisions. So in terms of feasibility it can be concluded that the assessment instrument for biology digital learning materials is worthy to be used in assessing digital learning media created by prospective biology teacher students.
Utilization of Learning Analytic on Measuring Student Participation in Online Learning
Authors: Adji S S , Hamda S
Published: November 2019

Learning analytics can be used to measure the level of student participation in online learning. This study is the best practice in conducting student learning assistance services through online learning, and aims to analyze student involvement during the learning process. The study was conducted on subjects offered by the Open University Chemistry Education course. The data were obtained based on the activity of online learning for one semester conducted by tutors and each tutor holding 1 class. The results obtained show that through learning analytic many items that can be assessed by the tutor on student activities during the online learning take place, among which are: 1) the number of overview accesses by the students on each topic or the reading of the tutorial material 2) the number of access made by each student on tutorial material 3) number of student access in reading each discussion material in discussion forum and, 4) number of response given/uploaded by every student in discussion forum. Other information that can be gained through the use of learning analytics is the interaction of learning that occurs between students with students and students with tutors. Interaction patterns are illustrated through graphs and responses among students.
Effect of didactical dialogue to enhance learning quality
Authors: Sari W K , Supriatna A , Hendayana S , Lestiyani S
Published: November 2019

One of the factors that determine the learning quality is the relationship that exists during the learning process. The relationship is the didactical dialogue and collaboration that occurs among students. Didactical dialogue and collaboration will happen when classroom interaction between teachers and students can critically interrogate the topic of lesson, express and listen to multiple voices and points of view, and create respectful and equitable classroom relations. The purpose of this study is to analyze and describe didactical dialogue that occurs among students and collaboration among students in sharing task activity during learning process. Sample was collected in one of private senior high school in Bandung. Data was taken from the topic of factors affecting reaction rate. The lesson was videotaped and transcribed. From the transcript results, the student dialogue is analyzed which section shows the didactical dialogue and the collaboration among students ctivities. Through this study, the deepness and spaciousness of students thinking was influenced by teachers capability to conduct the lesson, for instance how to elicit students idea by using question, how to give feedback from the response and how challenging the task designed by teacher. Didactical dialogue and collaboration among students show that quality learning process.
Digital learning model based on intelligent tutoring system in 3DMUVLE
Authors: Rasim  , Munir  , Rosmansyah Y , Langi A Z R
Published: November 2019

Information and Communication Technology (ICT) has been used in broad education both for pre-learning, in-learning, and post-learning. But its use often generalizes learning material for all students even though each student has different characters and abilities. Intelligent Tutoring System (ITS) is able to provide learning materials according to students’ models. This study aims to model ITS-based digital learning. This model consists of four parts, namely: domain knowledge, pedagogy, students’ model, and interface. Domain knowledge produces learning materials that are suitable for each student’ model and pedagogy while virtual learning environment is a learning interface for students. This interface integrates MOODLE, SLOODLE and OPENSIM. The student’s model used is Myer Briggs Type Indicator (MBTI). The results of this study are 16 types of students and 16 types of learning material. The implication of this research is a comprehensive model that integrates ITS and VLE.
Scheduling the cluster server node shutdown based on the hierarchical and k-means clustering combinations
Authors: Sudarsono G A , Nugroho E P , Putra R R J
Published: November 2019

The problem of server clusters is the use of electrical power. The data center in Indonesia consumed 1.5% of the national generating capacity in 2014. To solve this problem is to turn off the server node on the server cluster. With the turn off server nodes on server clusters scheduling, it’s expected to determine the time and duration of turning off server nodes. When the server cluster is running, data retrieval takes one, five and 15 minutes average load which is done every minute. Then the collected data is clustered using a combination of average linkage hierarchical clustering and K-Means clustering. The results of this clustering produce three clusters load averages that are “low”, “medium” and “high”. Load averages that included into the “low” category are sorted by the time of data retrieval to get the time and duration to turn off at each node. The results of the research result in scheduling turning off node one is 14.09 - 14.28, at node two is 14.47 - 06.57 and at node three is 06.57 - 07.18. Turn off server node scheduling is reduces the use of electrical power from 2,528 kWh to 2,519 kWh and doesn’t affect server quality parameters.
Education-based augmented reality applications for heat learning media content lesson in physics
Authors: Suryadi A , Rahayu G , Amalia I F , hamdani N A , Nuraeni R
Published: November 2019

This study aims to create applications that can be used as a medium of physics learning with sub-material heat. Application-shaped learning media created using Augmented Reality-based technology Android. The application created is named Mecalor. Mecalor application process using the Waterfall method. This Waterfall method provides a sequential approach to software lifecycle. Testing the feasibility of the application is done through four characteristics of the ISO 25010 standard which Suitability Functional, Performance Efficiency, Portability, and Usability. The test was conducted in Garut - Indonesia Vocational High School with a total of 30 students and two software experts. Data analysis techniques use a Likert scale and Guttman scale. The test results on the characteristics of Functional Suitability applications, Performance Efficiency, and Portability is valid with a percentage of 100% so it can be said that the application is good to use. Likewise, characteristics Usability test results also suggested a value of 3.9 so that applications can Mecalor declared fit for use.
The use of STEM project-based learning toward students’ concept mastery in learning light and optics
Authors: Hanif S , Wijaya A F C , Winarno N , Salsabila E R
Published: November 2019

Learning process in some school is still in the form of direct transfer from teacher to students, whereas students will learn better if the learning process is meaningful. The aim of this study is to investigate the effect of STEM Project-Based Learning on students’ Concept Mastery in learning light and optics. The method that is used in this study is a weak experiment with one group pre-test and post-test design. The population of this study is 8th-grade students in Junior Secondary School “X” that is located in Bandung, Indonesia. The sample is chosen by purposive sampling technique consist of 25 students. The result of this study shows that students concept mastery improves from pre-test and post-test. The improvement of concept mastery is obtained as much as 0.53 that categorized as a medium improvement. Based on the result STEM Project-Based Learning give a better effect on students’ concept mastery, so it can be considered as an alternative teaching model that can be implemented in Junior Secondary Schools.
Development of media model based on hands-on activity to improve conceptual understanding abilities of junior high school students in Bandung district
Authors: Nurjanah  , Dahlan J A , Wibisono Y
Published: November 2019

This study aims to (1) develop a media model based on hands-on activity and instrument to improve conceptual understanding. (2) conducting an instrument test to improve conceptual understanding abilities. The research method is used of this study is developmental research which is conducted by thought experiment and instruction experiment. The population of this study is the seventh-grade students of SMP Bandung. The results of trials of 210 junior high school students from 6 schools that have obtained flat building materials are obtained as follows: (1) all items about multiple choice conceptual understanding and validity test developed valid, (2) multiple choice questions conceptual understanding and description test developed reliable, (5) 90 mathematics teacher’s opinion on hands-on activity-based media model developed to construct a conceptual understanding of students.
Analysis of students’ mathematics resilience abilities on linear program material
Authors: Laelasari  , Darhim  , Prabawanto S
Published: November 2019

Many assumptions assume mathematical tasks are difficult, resulting in many students who feel a phobia or anxiety, or at least avoid involvement in any effort that may be required. This also happens among the students who follow lectures, especially the Linear Program. Students feel difficulty and easily give up in solving math problems. This study aims to analyze students’ mathematics resilience abilities on Linear Program material. The research method used one group pretest-posttest design. Population in this research is all student of semester 3 of Unswagati Cirebon Mathematics Education Study Program. The sample of research was taken by purposive sampling technique as many as 54 students who have been able to teach the Linear Program. Instruments in this study the final value of student learning outcomes that have followed the Linear Program material and mathematical resilience questionnaire. The result of the research shows that there is a difference in mathematics resilience ability between a high and medium-high group, and there is the influence of mathematics resilience on student learning result on Linear Program material.
The creativity of pre-service mathematics teachers in designing GeoGebra-assisted mathematical task
Authors: Fatimah A T
Published: November 2019

The aim research is to obtain a description of designing of the GeoGebra-assisted mathematical task created by pre-service mathematics teachers. This study uses a qualitative approach to observe the phenomenon of participants in making mathematical tasks. Participants are 26 pre-service mathematics teachers who will implement the program of teaching experience in mathematics teaching in high school in Ciamis. Participants work in the group (about 3-4 people) to make a GeoGebra-assisted mathematical task, the topic is the system of two linear equation. Creativity in the mathematical tasks designed is shown by a participant when they the integration of mathematical topics with GeoGebra for a specific task purpose. The results obtained in this study are mathematical assignments designed by utilizing the feedback generated by GeoGebra both geometrically and algebraically. The aimed of mathematical task design is at introducing new content, giving students the opportunity to apply procedures in new situations, and developing problem-solving, improving understanding skills, connections, and generalizations. These results indicate that pre-service mathematics teachers try to find creative mathematical tasks that integrate mathematics topics with GeoGebra.
Enhancing students’ mathematical synthesis ability by superitem learning model
Authors: Yulian V N , Wahyudin
Published: November 2019

This study aims to determine the improvement of student’s mathematical synthesis ability and student attitudes toward learning mathematics with superitem learning model. This research was quasi experiment in nature, with pretest-posttest control group design. The experimental class is given in the form of learning with superitem learning model and control classes are given learning with conventional learning model. The populations of this study are students of 8th grade public junior high school at North Bandung, with the research sample is selected two classes. Two classes are selected to be used as experimental class and control class. The instrument used consisted of mathematical synthesis ability test and attitude scale. The results of this study conclude that students’ mathematical synthesis ability that’s learning with superitem learning model better than students who received learning with conventional model. Students give positive responses and attitudes toward learning with superitem learning model.
Increasing mathematical communication skill using Quantum Teaching based on Hypnoteaching (QTH) in the Primary School Teacher Education (PSTE) students
Authors: Novianti I , Mulyaning E C , Priatna N
Published: November 2019

The lack of mathematical communication ability of the students is the result of less precisely applied learning model. Quantum Teaching based on hypnoteaching is a learning that is expected to improve student’s mathematical communication because by this model the material is explained in an effective and efficient way, and also the provision of hypnoteaching during learning its cause students eager to learn. This study is an experimental research. There are 50 seventh semester students of PSTE student as sample in this experiment selected randomly. An experimental class is provided with Quantum Teaching based on hypnoteaching (QTH), and a control class is given Ordinary Learning (OL). The instruments used are: test, observation sheet, and interview guide. Techniques of data analysis in this study using two-way Analysis of Variance with unequal cells. The result of this research is QTH learning have a better mathematical communication ability than student with OL. Based on the level of early mathematical ability (high, medium, and low), medium and low-ability students show significant differences, but not for high-ability students. Based on the response shown through the test, students with QTH showed an activity, and better Ability compared to OL.
Analysis of scientific literacy-based junior high school physics teaching materials readability on students increasing scientific literacy skills
Authors: Rusnayati H , Herviana G , Sari I M
Published: November 2019

The background of this study was the lack of scientific literacy skills of Indonesian students according to the research that have done by PISA in 2012. The preliminary shows that the average score of scientific literacy skills is 56,2. The aim of this study is to know the readability of scientific literacy-based physics teaching materials. The readability of teaching materials is divided into four chapter which in each chapter consist of characteristics from the aspect of scientific literacy for example, science knowledge, investigation of the nature of science, science as a way of thinking, and interaction between science, technology and society. One shot experimental design has been used as the method of this study. The data is obtained through scientific literacy skill test and cloze procedure test of teaching materials on second year junior high school students. Narrow test shows that the percentage of teaching materials readability is 67,5% and wide test shows that the percentage of teaching materials readability is 71.87%. It is implied from this result that the scientific literacy-based physics teaching material has high level of readability.
The analysis of critical thinking skills test in social-problems for physics education students with Rasch Model
Authors: Marfu’i L N R , Ilfiandra  , Nurhudaya
Published: November 2019

Critical thinking is related to several other abilities, such as decision making and problem solving ability. This study aims to identify measuring power of the critical thinking skills test and calculating parameter test for Physics Education students. The subjects are 44 students with age ranges from 18 to 21 years old. The results of this study indicate the level of critical thinking skills of physics education program students in the low category. This test has moderate reliability coefficient of 0.64, with the most difficult item number is the number 5 and the easiest one is 21 from Rasch Model. Items in the instrument has moderate level of difficulty for physics education students. Moreover, item discrimination of the instrument is quite good, with 9 items which could measure critical thinking skills of physics education students of Universitas Pendidikan Indonesia without creating confusion or misconception.
Develop children’s science process skills through building activities in center of beam: optical geometry on focus
Authors: Afifah R N , Syaodih E , Suhandi A , Maftuh B , Hermita N , Handayani H , Qonita  , Ningsih A R , Gumala Y , Samsudin A
Published: November 2019

The research aims to develop children’s science process through building beam learning activities. This research describes of the implementation of building activities in the center of beam focus of optical geometry in beams context. The instrument used in this research is the ability of science process. This study was conducted on 18 children early childhood in Bandung. Design the research used is descriptive qualitative. The results obtained indicate that building beams activity is able to give positive contribution to the development of children science process skills in TK Kartika XVI Bandung. Building activities also provide a positive response to the cognitive, physical, motor, language, religious, and emotional social development of children. The conclusion of this research that the process of building beam can positively impact on various aspects of child development.
Development of MBI2 as interactive media in order to enhance scientific communication skills in global warming subject
Authors: Firmansyah A R N , Chandra D T , Kaniawati I , Samsudin A , Novia H , Siahaan P
Published: November 2019

The needs of technology-based learning media on physics subject is amplified in each year, although the learning media often not contextual with the learning subject since certain subject is more suitable with direct experiment. The purpose of this research is to develop media that integrated with the subject (MBI2) in order to enhance scientific communication skills on subject that difficult to observe such global warming subject. This Research develop a media using Sherwoods developing model within the step is: Initiation, Specifications, Design, Production, Review and Evaluation, Delivery and Implementation. Thirty students in some middle school already participated in this research. The result approve that the students is encouraged to more communicative and showing a development with a normalize gain for writing scientific communication skills is 0.38 and for Oral Scientific communication skills is 0,24. With the conclusion is the utilization of MBI2 could be used for further research that related with enhancement of scientific communication skills.
Correlation reading infusion (RI) and scientific literacy competence (SLC) XI grade students on sound wave topic
Authors: Maulidia D , Utari S , Purwanto  , Karim S , Saepuzaman D , Nugraha M G , Prima E C
Published: November 2019

The results of previous research shows that there are difficulties in establishing SLC if students do not have enough knowledge, therefore students need to be given support knowledge through RI. Experimental study with one group pretest posttest design using a sample of 40 students were taken by cluster random sampling of a population of 238 students of class XI in one high school in Bandung aims to get an idea about the correlation of RI with SLC. RI instrument developed using a conceptual model and results of logical validity with CVR and CVI analysis obtained by value of 0.99 with the appropriate category and SLC instruments developed under the framework of PISA 2015 in the form of 11 questions covering descriptions explain scientific phenomena, designing scientific research, and evaluate and interpret scientific research with empirical test results show the range value of the validity 0,36-0,74 with a valid category and reliability of 0.72 to a high category. Results of research with correlation analysis product moment correlation values RI with SLC was 0.97 with a very high correlation category. This suggests that a class XI student in high school it was important reading material infusion on sound waves that SLC development process becomes easier.
The development of virtual laboratory on fluid materials
Authors: Jannati E D , Setiawan A , Siahaan P , Rochman C , Susanti D , Samantha Y
Published: November 2019

This study aims to study the development of laboratory learning media on the concept of fluids. The method used in this study is the research and development (R & D) method of implementation up to step 7, namely: (1) literature study, (2) needs analysis, (3) design of virtual lab learning media, (4) development of lab learning media virtual, (5) validation, (6) product testing, (7) product revision. Virtual laboratory learning media, have gone through a phase validation test by two material experts and one media expert who showed that laboratory learning media on fluid materials are feasible to be applied in learning. the results of sponsored pretest and posttest for students showed a significant increase. Recommended to be applied in a virtual learning laboratory is suitable to be applied in the Faculty of Engineering, Majalengka University.
Developing CAI-PBL with DDD-E model on magnetic fields concept
Authors: Fatah A , Chandra D T , Samsudin A
Published: November 2019

Technological developments are widely used in various fields including education. Computers is a product of technological development where in the world of education is used as a tool or media in learning. Today has been a lot of computer-based learning media but still focused on the delivery of material only. While the research will be developed is the making of CAI were in it integrated a model of learning to deliver the material. The purpose of this research is to develop a product of CAI through problem-based learning on magnetic field material. This research uses DDD-E (Decide, Design, Develop and Evaluate) development method. At the phase of the decision has analysed the needs associated with the manufacture of CAI-PBL. Furthermore, based on the results of needs analysis, CAI-PBL is designed and developed by researchers. Then validated at the evaluate stage by three validators (two physicists, and one media expert). It can be concluded that the development of CAI-PBL can have the potential to solve problem-solving skills.
VARK learning style and cooperative learning implementation on impulse and momentum
Authors: Sintia I , Rusnayati H , Samsudin A
Published: November 2019

Individuals have various preferences in learning and processing information. These variances in individuals learning are clarified by learning styles. A recent classification of learning style associates state that individual learning styles can be categorized into Visual, Aural, Read or Write and Kinesthetics (VARK). Current learning concepts focus more on the intellectual development features through visual/verbal approach. This visual/verbal approach seems to incorporate frequent scopes from other learning style preference. This research aims to determine student achievement on impulse momentum subject using cooperative learning which instruction is based on learning style and cooperative learning which instruction is mismatched on learning style. Research was designed according to quasi experimental with non-equivalent control group pre-test post-test design. The experimental group were formed into cooperative groups which instructions is based on learning styles for each student and the control group formed into cooperative groups which instruction was mismatched with students learning styles. The result shows that there is significant difference between control group and experimental group. In addition, it was determined that students in experimental group were more successful rather than students in control group.
Using inductive approach (IA) to enhance students’ critical thinking (CT) skills
Authors: Muliana  , Yusiran  , Agustinasari  , Asriyadin  , Susilawati E , Sarnita F , Siswanto  , Gumilar S , Gustina  , Erwinsyah A , Utami L , Amiruddin A , Syahrir
Published: November 2019

CT skills are one of the skills required by students in facing the real world problems in 21st century era. They can be trained by using several approaches in science learning context. However, there is a little study focused to investigate the impact of IA toward CT skills. This present study investigated the implementation of IA to enhance students’ CT skills. The experimental study, which was one group pretest posttest design, has been conducted to garner data from participants. There were 36 students (grade XI) who contributed as participants and they came from one public senior high school in Indonesia. In order to obtain data, an instrument related to CT skills was developed dealing with physics concepts. This finding revealed that students’ CT skills enhanced in medium category based on normalized gain (N-gain). A consideration of the implication of this present study is a deep insight in students’ CT skills in Indonesian high schools.
An investigation of students’ conceptual understanding levels on fluid dynamics using four-tier test
Authors: Dewi F H , Samsudin A , Nugraha M G
Published: November 2019

Student repeatedly have difficulties in understanding complex physics concepts, such as fluid dynamic concept. It is occurred because the students’ conceptual understanding is low, thus indicating a low student mental model. The study aims to describe the students’ conceptual understanding levels on fluid dynamic using four-tier diagnostic test. A four-tier diagnostic test is a multiple-choice diagnostic test that have four tiers consist of answer tier, confidence ratings for the answer tier, and reason tier. The instrument test utilized to describe students’ conceptual understanding level regarding to the mental models. This research uses a descriptive-quantitative method. The data were analyzed using the four-tier diagnostic test rubrics that were used in related literature to analysis students’ conceptual understanding levels. The subject of this study is 24 students in the eleventh grade (16-17 age in average) at high school in Bandung. The results show that students’ conceptual understanding levels mostly in sound understanding/SU (35,27%), partial understanding/PU (42,91%), alternative understanding/AC (17,82%) and no understanding/NU (4%), Based on the result, four-tier test is able to use for investigating conceptual understanding levels.