bluuebunny/crossref_metadata_2025 huggingface dataset:
Parameters (σ, ε) of Lennard-Jones for Fe, Ni, Pb for Potential and Cr based on Melting Point Values Using the Molecular Dynamics Method of the Lammps Program
Authors: Maghfiroh C Y , Arkundato A , Misto  , Maulina W
Published: June 2020

Lennard-Jones potential is the potential energy of the bond interaction between two atoms or free molecules based on the distance between them. Molecular dynamics simulations can be used to calculate various physical properties of materials based on specific interaction potentials. One of the physical properties of a material is its melting point. This research was conducted to find the potential parameter values of Lennard-Jones metal Fe, Pb, Ni and Cr based on the melting point value of the material using the LAMMPS program. In this study the normalization of potential parameters is done by comparing the results of the simulation melting point with the experimental melting point. This research produces a Lennard-Jones potential parameter value which yields a melting point value that has a relatively small description.
Modified Glucose Absorption Equation in An Oral Minimal Model for Type 2 Diabetes Mellitus
Authors: Kartono A , Mufid H M , Wahyudi S T
Published: June 2020

The previously minimal model that has been developed by Bergman is known that blood uptake can be used to the calculations of insulin sensitivity and glucose effectivity in an intravenous glucose tolerance test (IVGTT). In this study, a minimal model Bergman has been modified by adding glucose absorption factors considering the rate of glucose concentration in the small intestine. Based on these present model results, subjects with type 2 diabetes mellitus (T2DM) have higher glucose concentrations and thus require greater insulin performance compared with subject pre-diabetes and normal subject. Besides, subjects with T2DM have lower insulin sensitivity and glucose effectivity compared with subject pre-diabetes and normal subjects. Fitting results obtained from these present model results are obtained using R2 values of glucose and insulin concentration, all values were above 0.90. This shows the validation results of the comparison of all simulation results and experimental data are good.
Project Based Learning Integrated STEM to Increase Students’ Scientific Literacy of Fluid Statics Topic
Authors: Parno  , Yuliati L , Ndadari I P , Ali M
Published: June 2020

Learning in the 21st century deals with literacy skill. In fact, studies investigating Project-Based Learning Integrated Science Technology Engineering and Mathematics (PjBL-STEM) to develop students’ scientific literacy are under-explored. This research investigated the impact of PjBL-STEM on students’ scientific literacy of Fluid Statics topic in three classes, these are, Experiment (PjBL-STEM), Comparison (PjBL), and Control (traditional). In Quasi-Experimental Nonrandomized Control Pretest-Posttest Design environment, students in PjBL-STEM and PjBL classes made three products (Hartl apparatus, miniature of multi-level parking lot, and simple boat). Fluid Statics Scientific Literacy Test with seven discourses and eleven essay items was used with 0.908 Cronbach’s alpha reliability. Data was analysed with one-way ANOVA, post hoc Tukey, N-gain, and Cohen’s effect size. The results showed that three classes had significantly different scientific literacy, where PjBL-STEM was the highest and PjBL class is higher than the traditional class. The literacy improvement of Experiment class included in “high” category and both Comparison and Control classes were in “medium” category. The effect of operational implementation of all pairs of classes belonged in “very large” category in the enhancement of students’ scientific literacy. Students’ response was similar in PjBL-STEM and PjBL classes, though it is higher than traditional class in the final questionnaire.
The Students’ Voice of Volcanology in Education for Sustainable Development Context
Authors: Anggrayni S , Hariyono E , Madlazim
Published: June 2020

The aim of this study is to identify college students’ conception regarding to volcanic phenomena. This study was possessed the conception profile of freshmen in volcanology using questions instrument about volcanology concept and making decision skills instrument test which created by the researchers. A descriptive quantitative approach was used, which included 32 physics students at Surabaya State University as the participants. The result indicated that the physics students have a little understanding about volcanology concept. From all questions provided, they answered correctly less than 50 % only. In line with this, their making decision skills need to be trained. Meanwhile, as science teachers must have a good understanding of this subject matter. Therefore it can be concluded that the evaluated geoscience learning curriculum for pre-service science teachers needs to be evaluated.
Spectroscopic Study on the Film of Polyvinyl Alcohol and Carboxymethyl Cellulose as Polymer Electrolyte Materials
Authors: Putro P A , Yudasari N , Maddu A
Published: June 2020

Polymer electrolytes have emerged as a powerful platform in the progress of more efficient energy storage devices. In this study, polymer electrolyte materials (PEM) was successfully prepared using drop casting method. A spectroscopic study of the film were prepared by variying the ratio of the volume (PVA/CMC) at 100/0, 75/25, 50/50, 25/75 %. The functional groups were investigated using fourier transform infrared (FTIR) spectroscopy. The crystallinity degree obtained by X-ray diffraction (XRD). Their transparency degree were observed by UV-Vis spectroscopy. The ionic conductivity studies obtained by electrochemical impedance spectroscopy (EIS).
Weak Zone Determination Inside The Tunnel Using H/V Ratio Method
Authors: Sanny T A , Naufal H H
Published: June 2020

Tunnel is a vital structure in transportation as it shortens the distance between places through underground. Nevertheless, since it goes via underground, there are several risks might occur, such as tunnel collapse. This occasion will result in plenty of casualties. Therefore, as the preventive attempt, there should be a particular method to determine that the tunnel is strong enough. One of the methods that may work for this case is microtremor and one of the most common method in microtremor is H/V ratio. H/V ratio is able to describe a natural frequency of a place or a structure. By using the natural frequency, the stability of the tunnel can be determined. To test out the method, a measurement is conducted in a tunnel at Institut Teknologi Bandung. This tunnel connects the main campus and the campus sports ground. It also lies under the main road which has a lot of traffics at all time. The measurement is done on the wall side of the tunnel, while the space between measurement station is 6 meters and the station cover the whole tunnel wall side. After measuring the tremor in every station, the tremor data will be processed with Geopsy software and the natural frequency of the tunnel will be acquired. Subsequently, the natural frequency of the entire tunnel will be plotted and the result from this plotting can be used to determine the weak zone of the tunnel.
HYSITS: A MATLAB Code to Process Vibrating Sample Magnetometer Data (Hysteresis Loop)
Authors: Erdyanti R B T , Antareza M A , Tjiongnotoputera K D , Mariyanto M
Published: June 2020

Vibrating-sample magnetometer (VSM) is a magnetic measurement method by observing magnetic moment (M) which is a response of applying ascending and descending magnetic field (H) to the material. The data of this ascending and descending magnetic field will form a kind of loop called hysteresis loop. The hysteresis curve of each material will be different for each kind, so that this curve can be used to evaluate type and domain of magnetic mineral. This paper introduces HYSITS, a MATLAB code for analysing the magnetic hysteresis curve. We aim to provide an easy-use program, such as the feature to adjust smoothing span and increment parameter. With that the hysteresis curve analysis can be done effectively. The optimal result of the parameters adjustment can be seen from the smoothing span 10 for increment values 0,001 and 0,002 on the graph. This MATLAB code will generate 3 plots, which are hysteresis curve (magnetic moment vs. magnetic field), difference of ascending and descending magnetic moment (ΔM vs. H), and the 1st derivative of ΔM vs. H. Although HYSITS has several features that distinguishes it from its non-MATLAB predecessors, HYSITS still needs improvements so that it can be more reliable for research about magnetic hysteresis
The Development of Viscosity Practice Tools Based on Information and Communication Technology Using Arduino and Android on Static Fluid Material for Grade XI Senior High School
Authors: Sandjaja D P , Roza L , Hidayat M N , Rosyid F A , Makdiani N
Published: June 2020

A difficult practicum activity has become a problem with students’ activities and lack of use on ICT-based practice tools, especially Android. The purpose of this research is to develop physics learning media in the form of practical tools and Android applications on static fluid material with a focus on viscosity. This research is development research by adopting the Borg & Gall development model. At the initial research and information gathering stage, the problem and needs analysis activities are carried out. In the planning stage, an initial design is carried out. During the initial product format development phase, the prototype is designed as a manifestation of the defined ideas and ideas. In the initial trial phase, the media are tested on material experts and media experts and then evaluated. At the field trial stage, the media were tested on a small scale with 30 respondents. Data obtained through the observation method were analyzed descriptively qualitatively. While the validation data were analyzed descriptively qualitative and quantitative. The average score of material expertise was 79.78% (good), media expertise was 82.59% (good), small scale test was 84.78% (good). So it can be concluded that this application is suitable for use as a medium for learning physics.
Integration of Learning Science, Technology, Engineering, and Mathematics (STEM) in The Wetland Environment Area to Increase Students’ Creativity
Authors: Susilowati E , Miriam S , Suyidno S , Sholahuddin A , Winarno N
Published: June 2020

In the era of industrial revolution 4.0, creativity is a key factor to face the challenges and opportunities of the increasingly complex development of science and technology. This requires the world of education, especially those located in the wetland environment to develop student creativity in exploring and maximizing the potential of the surrounding wetland environment. This study aims to determine the effect of STEM-based learning on the level of scientific creativity of students in solving renewable energy problems in the wetland environment. This research has involved 45 students who have applied Physics courses. The research method used is qualitative and quantitative methods (mixed methods) to determine the level of student creativity based on creativity review as 4P (Person, Process, Product, and Press). The results showed that the level of student creativity was influenced by STEM-based learning; where creativity is a key factor in the integration of science, technology, engineering, and mathematics, and its application in solving problems in the wetland environment.
Picsar (Physics Augmented Reality) as a Learning Media to Practice Abstract Thinking Skills in Atomic Model
Authors: Nandyansah W , Suprapto N , Mubarok H
Published: June 2020

The research aimed at developing an augmented reality-based learning media to train abstract thinking skills that are feasible (practical and effective). Development research using the ADDIE model (Analysis, Design, Develop, Implementation, and Evaluation) guided the research methodology. Specifically, a one-shot case study was utilised in the research trial design. In the Spring Semester 2019, thirty three students from private high school in Surabaya implied the Picsar (Physics Augmented Reality). Data collection techniques used the form of observation sheet learning to assess the practicality of the media, assessment sheets, and student response questionnaires to assess the effectiveness of the media. The results of the research obtained some important points: 1) the percentage of learning implementation was 98.14% with a very good category; 2) the percentage of students’ abstract thinking skills indicated in varying numbers: 100% of proportional reasoning with very good categories, 66.67% of probabilistic reasoning with good categories, 75.76% combinatorial reasoning with good categories, and 66.67% of correlation reasoning with a good category), and the percentage of students’ responses by 92.76% with a very good category.
The Effect of Solution Concentration and Deposition Time on Viscoelasticity and Morphology of Polyaniline Coating
Authors: Rahayu E I P , Putri N P
Published: June 2020

As one of the most studied conductive polymers, polyaniline (PANi) has a variety of applications, one of which is an active gas sensor, due to the presence of amine and imine groups in PANi that can easily react with gas. Quartz crystal microbalance (QCM) is a piezoelectric sensor with the working principle of frequency changes as a result of changes in mass on its surface. As an active gas sensor material on the QCM substrate, PANi must be deposited in the form of a thin layer. A good quality of thin film is if the film does not give loading the effect on QCM and has a homogeneous morphology. This research has succeeded in depositing PANi thin films by surface polymerization method by varying the parameters of PANi solution concentration and deposition time. Deposition parameters that are varied can be seen its effect on the viscoelasticity and morphology of PANi thin film formed. The viscoelasticity of the thin film was interpreted from the measurement of the thin layer impedance using an impedance analyser, while the morphology of the thin film was characterized using SEM. From the results of this study it was found that with the surface polymerization method, the PANi thin layer impedance value changes with the deposition time which is getting longer, but the change in impedance value is not significant and does not give a loading effect on QCM. At the same deposition time with different solution concentrations, the impedance value of the formed layer also does not give a loading effect on QCM. Although it has successfully deposited PANi with a surface polymerization method, the morphology of the PANi film formed is not yet homogeneous, as seen from the formation of PANi agglomeration on the QCM surface.
Implementation of Problem Based Learning to Train Physics Students’ Problem Solving Skills
Authors: Hidaayatullaah H N , Dwikoranto  , Suprapto N , Mubarok H , Wulandari D
Published: June 2020

Problem solving skills (PSS) are the skills needed to face the challenges of the industrial revolution 4.0, which need to be developed through the learning process, and are still a challenge for teachers today. This study aims to determine the effect of the implementation of problem-based learning (PBL) in practicing students’ problem solving abilities on material momentum and impulses. The research utilised a pre-experimental design with one-group pretest-posttest paradigm. The sample in this study consisted of 3 groups: one experimental group and two replication groups. The results showed that the implementation of PBL affected the problem solving abilities of students in the experimental and replication groups. The three groups experienced a different increase of PSS due to several factors, namely the implementation of learning, the existence of different student intelligence and student activities during learning.
Multidisciplinary, Interdisciplinary, and Transdisciplinary Approaches in Literacy Learning Model
Authors: Sunarti T , Wasis W , Madlazin M , Suyidno S
Published: June 2020

A multidisciplinary, interdisciplinary, and transdisciplinary approach has an important contribution to designing a quality model. The purpose of this study is to determine the feasibility of the Literacy Learning Model (LLM) based on a review of multidisciplinary, interdisciplinary, and transdisciplinary approaches. The research included a meta-analysis study through a review of 23 previous articles relating to the contribution of physics, educational psychology, and technology in LLM design. Data collected is done by reduction, identifying variable, mind map, exposure, and conclusion. The results showed that physics, educational psychology, and technology; also multidisciplinary, interdisciplinary, and transdisciplinary approaches have contributed to the LLM design. This has made the feasibility of LLM as an innovative learning design to train literacy learning planning for pre-service physics students.
Crustal Structure Beneath KLNI Station in Lombok Island Based on Teleseismic Receiver Function
Authors: Ariyanto P , Ariwibowo S , Wijaya A , Pratama R
Published: June 2020

Lombok Island is part of the Sunda-Banda arc system which is one of the most active tectonic regions in the world. In Lombok area there are two subduction zones namely Java trench in the south and Flores back arc thrust in the north. Information on crustal structure is needed to explain the tectonic development and geodynamic interaction of the area. The receiver function is one of the techniques used in the study to identify subsurface and wave velocity structures based on earthquake data regardless of the source mechanism. We analyzed receiver function of teleseismic events (epicenter distance 30-90°) and magnitude more than 6 (M>6) to estimate crustal thickness, Vp/Vs ratio and wave velocity structure beneath KLNI station using H-κ stacking and inversion method. We obtained that the crustal thickness and Vp/Vs ratio beneath KLNI station is about 21.38 km and 2.05. The high Vp/Vs ratio might be an indication of partial melting related to the upwelling of hot asthenosphere material through the subduction slab of Java Trench. The depth of the low velocity zone beneath KLNI station is at 10-18 km which is estimated due to the presence of geothermal
Triggering Students’ Scientific Literacy through Static Fluid Scrapbook
Authors: Yuniar R E , Suprapto N , Mubarok H
Published: June 2020

The research was purposed to describe science literacy after the implementation of the scrapbook as a media in a static fluid. The research utilised pre experimental design with one-group pre-test and post-test design. A group of 36 students of public high school in East Java Indonesia was invited as the research participants. The instrument consisted of literacy test and documentation guidance was used in data collection. Pre-test and post-test scores were analysed with paired t-test in describing science literacy improvement, n-gain analyses was aimed at describing science literacy improvement category. The averaged of pre-test score was 35 and the post-test score was 71. The t-test result was t = 34.63, with ttable
= 2.03 (t > ttable
). Meanwhile, the result of gain score analysis was 0.55. Based on that result, it showed that the implementation of the scrapbook as a media could improve students’ scientific literacy especially in static fluid concept. The researchers also predict that it enhance students’ scientific literacy in another physics concept.
Porosity Characteristics and Electrochemical Performance of rGO Coconut Shell as Supercapacitor Electrodes
Authors: Kusumawati D H , Putri N P , Asnawi  , Dewi T S , Munasir
Published: June 2020

Supercapacitor is a device which is currently being researched. Research on supercapacitors can be done from various aspects, including the supercapacitor electrodes, electronic materials or dielectric materials as well as the electrochemical performance of supercapacitors. In the research that has been done, has been obtained rGO material that has a specific capacitance value of 485.97 F / gram with calcination temperature of 1000°C and an ultrasonication time of 2.5 hours. The reduction of Graphene Oxide has fulfilled the standards as a supercapacitor. Another characteristic that must be fulfilled as a supercapacitor is porosity, to determine the ability of adsorption and desorption, as well as electrochemical performance. The results of BET characterization for rGO produced from coconut shells that the largest distribution in the adsorption process was 0.00192 cc/nm/g at a pore diameter of 35.68 nm, while the largest desorption distribution was at 0.00211 cc/nm/g at pore diameter 35.63 nm. So that it can be categorized that rGO is a mesoporous category with a pore diameter of 35.63 - 35.68 nm. Cyclic Voltammetry characterization results obtained that rGO has a reversible curve and is very wide in rGO with 2.5 hours ultrasonication.
Contribution of Physics Learning Laboratory on Laboratory Management Course
Authors: Nilawati W , Fitri U R , Susanti D , Maulana S
Published: June 2020

This research aims to determine the contribution of physics learning laboratories to laboratory management courses. The method used in this research is descriptive quantitative and qualitative. The qualitative research process is circular in nature and quantitative is linear. The results of this study indicate that the learning laboratory owned by the Physics Education Study Program, Universitas Negeri Jakarta obtained a percentage of 100% for five categories: minimal area, capacity, lighting, cleanliness and tidiness, and infrastructure, while 87.5% for the room facilities category. The value of 87.5% was obtained because there were some components that did not fit the criteria of a good learning laboratory. The contribution to laboratory management courses shows that four of the five basic competencies (laboratory administration, standardization of physics laboratories, operation of laboratory support equipment and laboratory work safety) are carried out in an integrated manner with physics learning laboratories, while laboratory competence and functions can be done theoretically in class. Based on the results and discussion above, it can be concluded that the physics learning laboratory of the Physics Education Study Program, Universitas Negeri Jakarta has quality with a very decent category and has a major contribution in supporting laboratory management lectures.
The Design of Information System for Physics Learning Media Laboratory
Authors: Fitri U R , Sugihartono I , Maulana S , Aprilia R
Published: June 2020

This study aims to develop information systems for physics learning media laboratory and facilitate students in obtaining academic information, especially physics education laboratory. The research method used is research and development with ADDIE model. The developed web-based information system then will be tested by students from the academic community/academic program of physics education and from outside people to use the online data system. Users who have used a web-based information system are required to fill out the online questionnaire available on the web page. The results obtained from 30 physics education program students are 92.0% with very good criteria and same criteria is obtained from 20 outside users or other institutions with value 91.0%. According to the result obtained from the test indicator, it can be concluded that the web-based information system that has been made meets the eligibility requirements to be used as laboratory services to meet the needs of physics education students.
Modelling the effects of Psychological Well-Being Attributes on Students’ Happiness
Authors: Khairuddin M T , Mahmud Z
Published: June 2020

Assessing psychological well-being of students and their happiness towards life is important towards building a healthy nation and future generation with sound mental state. This study describes the effects of psychological well-being attributes on the happiness of students using hierarchical regression modelling. The attributes which include general health, vitality, self-acceptance, academic stress, self-control, and positive relation are measured in a questionnaire developed based on a focus group interview and sources relating to psychological well-being issues. A sample of 384 undergraduate students under the Science and Technology programmes of study from a local public university in Malaysia were surveyed. The study shows that there are highly significant positive effects of students’ general health, vitality, and self-acceptance on their happiness with self-acceptance being the most important predictor. Even though academic stress and self-control are not significantly related, these attributes are found to be negatively related with happiness. Generally within the context of this study, students’ happiness at this public university are associated with strong vitality, and high self-acceptance and strong positive relation with peers.
The Classification Performance using Support Vector Machine for Endemic Dengue Cases
Authors: Nordin N I , Mohd Sobri N , Ismail N A , Zulkifli S N , Abd Razak N F , Mahmud M
Published: June 2020

Dengue fever (DF) and the potentially fatal dengue haemorrhagic fever (DHF) are continue to be a crucial public health concern in Malaysia. This paper proposes a prediction model that incorporates Support Vector Machine (SVM) in predicting future dengue outbreak. Datasets used in the undertaken study includes data on dengue cases provided by the Health Department in Kelantan, Malaysia. Data scaling were applied to normalize the range of features before being fed into the training model. In this regard, SVM models built on the basis of three different kernel functions including Gaussian radial basis function (RBF), polynomial function and linear function. The SVM with RBF kernel function was superior to the other techniques because it obtains the highest prediction accuracy of 85%. The polynomial is an alternative model that can achieve a high prediction performance in terms of sensitivity (76%) and specificity (87%).
Exploring the Importance of Players’ Characteristics and Performance on Serve and Return of Serve in Winning the Women’s Singles Grand Slam Tennis Tournaments
Authors: Zainan Abidin A W , Ruslan N A S
Published: June 2020

Sports analytics has become very popular in recent years. Many researchers have been using the tools and technique to study tennis player performance in various aspects during matches. However, much of the studies were performed on male players while much less attention were made on female players. This study explores the female players’ characteristics and serve performance that leads to winning matches in women’s singles 2018 Grand Slam tennis tournaments. Using data provided by the official website of the Women Tennis Association (WTA), 1016 single matches in all four 2018 Grand Slam Tournaments were analysed to evaluate winning traits in tennis specifically looking at the two most important strokes in tennis which are the serve and return of serve. Additionally, other personal player characteristics that would influence the match outcomes were also evaluated. To achieve the objectives of the study, odds ratio and chi-square test were used to compare between the match winner and match loser. The study revealed that percentage of first serve return won (PFSRW) has the highest odds ratio value (OR=1.263) followed by the percentage of first serve won (PFSW) with odds ratio equal to 1.244. These showed that having a good first serve, plays an important factor in increasing the winning odds as compared to second serve either in serve or in return of serve. This study also reveals that a taller player had the advantage over a shorter player for faster serve speed (p-value<0.05).
Analysing Online Vacancy and Skills Demand using Text Mining
Authors: Nasir S A Md , Wan Yaacob W F , Wan Aziz W A H
Published: June 2020

The issue of graduates’ employability has become a major concern in many countries as the number of graduates keep increasing over the years. Fresh graduates are experiencing difficulties in finding meaningful employment as the growth in hiring has slowed in the recent period. With the impact of fourth industrial revolution, today graduates face a world transformed by technology. The role of universities in higher education become more challenging in shaping more digital technology graduates with the right skills and knowledge. Problems can be seen at both management level of higher education in producing graduates who can meet the needs of industry while industry is also facing the problem of finding skilled graduates who suit their needs. To examine the work skills demanded from Industry of Malaysian, this study proposed a text mining approach from 465 unstructured data of analyst job vacancies in classifying job titles and extracting vacancy and skills from job descriptions. The methodology involved are text retrieval, text pre-processing, word cloud corpus generation and text clustering. The findings indicate that the selected job posts emphasize more on vacancies information rather than skills needed which further shows the gap existence between the skills demand and supply.
Examining Students’ Aptitude using Project-Based Learning through University-Industry Collaboration
Authors: Ahmad Zukarnain Z , Wan Husain W S , Che Hassan S H , Nik Kamaruzaman N N , Mohd Zin N A , Wan Aziz W A H
Published: June 2020

The University has an important role to prepare their students with the knowledge they need in order to competently compete in professional activities after graduation. In addition to encourage students’ creative thinking skills in multimedia interactive projects, project-based learning aligns students’ views with the industry’s needs, since it gives students the opportunity to do the real world applications beyond the classroom. This paper intends to investigate the impact of project-based learning with collaborative learning on the academic achievement and learning motivation of undergraduate students who are taking Multimedia course. Data analysis were done using descriptive analysis. Based on the survey conducted by this study, most of the students agreed that collaborative learning could help them practice a set of skills that will be demanded by future employers such as creativity, working in group, problem solving techniques, leadership and the ability to generate innovative ideas. These skills help them leverage their interpersonal skills as well as having the knowledge they are learning in the university. The values obtained from the learning process will shape them as quality graduates to serve their future employers.
Evaluating Technical Efficiency of Stock Performance using Copula-Based Stochastic Frontier Analysis Approach
Authors: Arsad R , Isa Z , Ismail N , Razak R Ab
Published: June 2020

This study estimates the technical efficiency for 14 selected Malaysian trading and services companies for 2017 and 2018 using the Cobb-Douglas with the Stochastic Frontier production model. In standard stochastic frontier analysis (SSFA), the two-sided error, statistical noise, and one-sided error, inefficiency term are assumed to be independent. The assumption for statistical noise is normally distributed and the inefficiency term is half-normal distributed. In this paper, the copula model is applied to capture the joint distribution of these two error components. The copula model is an alternative method that is able to account for the joint multivariate distribution. Copula functions can be used to capture rank correlation and tail dependence between two error components, thus making the SFA more flexible. Seven copula models from the Archimedean copula family are considered in this study including the copulas with the trigonometric and hyperbolic generator. This study further compares the technical efficiency yielded by copulas with standard SFA, DEA-CCR and DEA-BCC models. The results raise the question of the reliability of SFA based on the standard model. Since the dependence error between statistical noise and inefficiency error cannot be ignored, the copula-based in SFA models can be considered as an alternative suitable tool for measuring efficiency performance.
Adding feature selection on Naïve Bayes to increase accuracy on classification heart attack disease
Authors: Purnomo Adi , Barata Mula Agung , Soeleman Moch Arief , Alzami Farrikh
Published: June 2020

Feature selection in the classification model has a role to choose relevant and interconnected features in the data mining task. in the medical world, feature selection can help the classification model in predicting heart attack. Naive Bayes is one of the most popular classification learning methods that can help to predict patients in helping paramedics to make decisions. The addition of feature selection in the form of backward elimination can increase the accuracy of Naïve Bayes by 89.45% from 84.29% previously. The results of this study indicate the accuracy of a backward selection method in predicting heart attack is quite high in adding accuracy.
Modeling and verification of solar panel mesurement for Household scale
Authors: Hasanah Herliyani , Lestari Wiji , Susanto Rudi , Nuryani  , Purnama Budi
Published: June 2020

This research aims to build a modeling of solar panels that will be verified with the results of experiment. The measurements of the implementation of solar panels that have been installed at the household scale. Solar photovoltaic (PV) produces power that is affected by solar irradiation and ambient temperature. These two parameters have been the input values in solar panel modeling. Modeling PV cell simulationwas using Simulink Matlab. This modelingused two solar panels with a total capacity of 200 W which are installed in parallel and share the same voltage. This model is able to simulate the I-V characteristic curve and the P-V characteristic curve. Based on the results of measurements of the implementation of solar panels that have been installed in Sukoharjo, Central Java at the longitude location point 10.870902 and latitude -7.603960 with the capacity and electrical characteristics data of the solar panels that were the same as the modeling, the Root Mean Square (RMSE) results of 0.13784 and 0.31305.
Development of CNC machining II textbooks to increase the effectiveness of student learning in the mechanical engineering education study program
Authors: Muslim  , Basuki Nur , Riadi Selamat
Published: June 2020

This research is research development. The research model used in this research is the development of 4D (Four-D Model) which consists of four stages: the defining stage, the design stage, and the development phase. While the dissemination phase was not carried out because this research was only limited to the feasibility test and the effectiveness of learning media in the form of books. In this study, the respondents were 3 book experts, 3 lecturers who had CNC machine expertise competence in the Department of Mechanical Engineering Education, Faculty of Engineering, State University of Medan. The research instrument used to collect data in the form of questionnaire sheets and observation sheets. Data analysis was performed to determine the feasibility and effectiveness of the resulting CNC II / advanced book. From the results of this development research, it was shown that the developed CNC II / advanced book was suitable for use in learning advanced CNC courses. The results of book validation by book experts amounted to 86.67%, CNC exports amounted to 95.80.% Included in the very feasible criteria. The effectiveness of the advanced CNC learning book that was developed already meets the requirements of learning media with a percentage of positive student responses to the book of 96.11% of the criterion score, as well as an increase in student learning activities expressed in percentage
Observation and heuristics evaluation of student web-based application of SIPADU-STIS
Authors: Maghfiroh Lutfi Rahmatuti
Published: June 2020

Politeknik Statistika STIS has an integrated information system called SIPADU-STIS. One part of the system is a web-based application for students. Students use this system to support learning daily activities like check lecture schedule, grade, etc. This system was built by personnel and students. However, this new system was tested only by the black box method and tested to users with the System Usability Scale (SUS) questionnaire. The system has not been tested in terms of interface and interaction with users. Whereas the well-designed interface and user interaction can improve the quality of service to users (students). Therefore, researchers want to test the interface and interaction with users of the system. We conduct an observation of the application and evaluation of heuristics. The heuristic evaluation used is based on 10 principles by Nielsen. Respondents are chosen by students using convenience sampling. Based on the data obtained, all aspects still have shortcomings or problems, even though only 16.7% stated it. There is only one aspect that has a cosmetic problem that is the aspect of match between the system and the real world. Six aspects have minor usability problems, those are visibility of system status/feedback, consistency and standards, error prevention, recognition rather than recall, aesthetic and minimalist design, and help and documentation. There is one aspect that has a major usability problem, help user recognize, dialogue, and recovers from errors. Two of the last aspects that must be redesigned, are the aspect of user control and freedom and aspect of flexibility and efficiency of Use.
The development of audiobook interactive physics based on integrating Qur’an with demonstration tools for blind students
Authors: Alatas Fathiah , Solehat Devi
Published: June 2020

One of the teaching material for blind students is a textbook in braille. Carrying a thick braille’s book lead to be burdensome for students. Digitization like an audiobook became the key for disability students to read an information in a book form. The study aims to develop an interactive audiobook based on the integration of science and Quranic values for blind students. Research and development method with Purposive Sampling technique used in this research. Data collecting conducted from three Senior High Schools of Inclusion (Sekolah Menengah Pendidikan Luar Biasa) that are Pembina Tingkat Jakarta School of Inclusion (Sekolah Luar Biasa Pembina Tingkat Nasional Jakarta), A Tan Miat Bekasi School of Inclusion (Sekolah Luar Biasa A Tan Miat Bekasi) and Mekar Sari Bogor School of Inclusion (Sekolah Luar Biasa Mekar Sari Bogor). Validity level was measured by validity expert and the effectiveness was measured by student response during learning activities. The results indicate that the implementation of interactive audiobook based on the Quran integrating increase the level of student comprehension. Therefore, this research has added practical media that is considered necessary in physical learning for students with disabilities, however the utilization has to be frequently.
Development of virtual reality technology in environmental pollution media learning content for junior high school students
Authors: Ramansyah Wanda , Aini Nuru , Arkadiantika Irnando , Nur Satiantoro Arief Fatur Roqi
Published: June 2020

Virtual Reality is a learning media that allows students to independently find out, explore, and build their own knowledge in the context of learning resembling the desired environment in the delivery of learning content. The development of virtual reality has a role to bring students into an environment in this case the sea coast and as if students will experience the view of a clean or uncontaminated coastal environment and a polluted coastal environment. In developing this virtual reality product, the developer uses the ADDIE model which consists of 5 steps, namely: (1) Analysis, (2) Design, (3) Development, (4) Implementation, and (5) Evaluation. The trials in this study involved content experts, media experts, individual tests (3 students), small group tests (9 students), and large group tests (25 students). The result of content expert validation was 83% (High). The results of media expert validation were 90% (Very High). The results from individual tests amounted to 85% (High). Small group test results at 87% (High). Large group test results at 84% (High). The conclusion of this development research, virtual reality learning media about “environmental pollution” is very suitable to be used as a learning media to support teachers in delivering learning content.
Evaluating students logical thinking ability: TPACK model as a physics learning strategy to improve students logical thinking ability
Authors: Muzaky Ahmad Furqon , Sunarno Widha , Harjana
Published: June 2020

Physics has the character of logical thinking. The use of technology in physics learning encounters the problem. The purpose of this study is to evaluate students logical thinking ability and determine a physics learning strategy to improve students logical thinking ability. The subjects of this study were 81 Islamic boarding school students in Ponorogo. The research approach was used mix method. Instrument test research was used by giving Tests of Logical Thinking (TOLT) which developed by Tobin and Capie. Instrument test contains 10 questions that depict probabilistic reasoning, controlling variable, proportional reasoning, correlational reasoning, and combinatorial reasoning. The results show that the average students logical thinking ability occupies a level of concrete thinking with a score of 1,36. This finding describes the logical thinking ability was still being the lowest level. Therefore, alternative learning such as integrating with technology is necessary to improve the logical thinking ability of students. Integrating learning with technology can be done by TPACK model.
Identification of preservice biology teachers’ metacognitive awareness and metacognitive skills
Authors: Amin Astuti Muh. , Adiansyah Romi
Published: June 2020

Metacognition can make a significant contribution to learning, especially that related to intellectual ability. Students’ metacognitive awareness and skills can be developed through consistent implementation of appropriate learning designs and students’ progress monitoring. The current research attempted to identify students’ metacognitive awareness and metacognitive skills in a biology education context. This research involved 142 preservice biology teachers from STKIP Pembangunan Indonesia Makassar, UIN Alauddin Makassar, Universitas Pejuang Republik Indonesia (UPRI) Makassar, and STKIP Yapim Maros. This study employed a descriptive quantitative method where metacognitive awareness inventory (MAI) was distributed to gather data on the participants’ metacognitive awareness and an essay test was conducted to examine the students’ metacognitive skills. The results show that the students’ metacognitive awareness falls into very low category with the average score of 37,55 for planning, 37,97 for monitoring, 38,39 for evaluating, and 35,73 for revising. Based on the test results, almost half of the students (44,90%) are categorized can not really; none of them (0%) were super or ok; 13,63% of the students fall into development category; 39,49% into risk category; and 1,97% into not yet category.
Development and application of national exam based teaching materials for junior high school students using national education standard
Authors: Mustikasari I , Sajidan  , Karyanto P
Published: June 2020

Education is one of life aspect is currently required in 2013--revised in 2017--curriculum to have skills that must collaborate in realizing students who have character and have scientific insight. In the process of learning science at the unit level of education, especially the junior secondary level in biology, there is still a demand and need from practical aspects to improve teaching materials that are updated to increase student competency. The purpose of this study is to improve the competency of students based on the national examination results of students during the last 3 years from 2016 to 2018 decreased in percentage. This research was conducted by a descriptive research method. The subjects of this study were students of class XI in Surakarta Junior High School. Data on the results of national examinations for the last 3 years were collected using the National Education Assessment Center (PusPenDikNas) data and analyzed using the National Education Standard (SNP) instrument of 8 Standards. The results of the analysis of teaching materials used in these schools indicate that the highest percentage of gab or problems in the standard process is 2.78%. This shows that teaching materials that are still used in schools need to be improved, therefore teaching materials must be a concern in the learning process of student science.
An analysis of students’ error in completing the contextual problems based on Newman’s procedure
Authors: Kristianti L W , Retnawati H
Published: June 2020

The aim of this study is to determine the students’ errors in solving mathematical problems of the system of two-variable linear equations based on Newman’s Procedure in terms of students’ cognitive styles. The type of this research is descriptive qualitative research. The subjects were eighth-grade students of Pangudi Luhur 1 Junior High School in Yogyakarta 2018/2019. The research method used is descriptive. The data were collected through documentation, interviews, and test. The data analysis is done by data reduction, data presentation, and conclusion drawing. Based on the results of this study, it can be concluded that students still have errors in solving the story question problems of the system of two-variable linear equations. The cause of errors based on Newman’s theory in terms of the cognitive style of students is that students are not able to understand the questions well, students also have lack mastery of the material, so the students are confused in determining step-by-step work of the questions. Students also tend to be less careful in working on problems and are less accustomed to working on problems in a structured manner.
Example in concept map on discovery and reporting problem based learning accompanied by instructional techniques
Authors: Ikhsan Muhammad , Widoretno Sri , Saputra Alanindra , Sajidan
Published: June 2020

The research aims to calculate the example scores in CM by applying instructional techniques in the PBL discovery and reporting stage. This research was a classroom action research with planning, actions and observations, and reflection procedures. The participants were 35 high school students. Data collection techniques were the observation, assessment of students’ CM on the elements of example, performance assessment, interviews, and documentation. The data collected were the example CM scores and percentage of syntax implementation. Data validation used the triangulation method, which included CM example scores, interviews, and documentation. Data analysis with qualitative analysis, including data reduction, data presentation, and conclusions drawing. The results of the research in the pre-cycle, cycle 1, and cycle 2 respectively showed an average score of example CM was 14%, 20%, 60%, thus the percentage of the score of example CM has increased. The increase in the percentage of example CM scores because of the application of instructional techniques to the discovery and reporting stage of PBL.