bluuebunny/crossref_metadata_2025 huggingface dataset:
Dynamic characterization of beating sinusoidal wave oscillations in a thin-slice solid-state laser with coupled orthogonally polarized transverse modes
Authors: Otsuka Kenju
Published: November 2019

Dynamic characterization of self-induced beating sinusoidal wave (BSW) oscillations and related phenomena, which were previously explored in a thin-slice dual-polarization solid-state laser operating in the regime of incomplete mode-locking of orthogonally polarized transverse eigenmodes, namely, a quasi-locked state Otsuka (2018 Laser Phys. Lett. 15 075001), is performed in terms of the amplitude correlation coefficient and intensity circulation among various orthogonally polarized mode pairs. Polarization-dependent symmetry-breaking featuring a nonreciprocal intensity flow for different orthogonally polarized mode pairs operating in the BSW state are found. The singular state is hidden in a nonlinear system where a perfect mode-locked BSW state with a large amplitude correlation coefficient featuring reciprocal intensity flow is established for a transverse mode pair possessing particular polarization directions that are related to the intensity ratio of orthogonally polarized transverse eigenmodes. Self-organized chaos synchronization is shown to take place for such a single pair of transverse modes subjected to self-mixing modulations.
Carrier-envelope-phase dependence of harmonics induced by a few-cycle vortex laser
Authors: Zhang Chaojin , Liu Chengpu
Published: November 2019

When a few-cycle vortex laser interacted with an inversion-symmetric atomic-like system, beyond the usual odd-order harmonics, some additional components also occur. The detailed numerical investigation on their transverse field distributions discloses that they depend sensitively on the carrier-envelope-phase (CEP) and the rotation period of the transverse distribution is 2π. This could be used to directly determine the CEP value of an incident pulse, unique without falling back on specific polar molecules or static electric fields.
Spectral attenuation of a 400-nm laser pulse propagating through a plasma filament induced by an intense femtosecond laser pulse*
Authors: Wang Quan-Jun , Chen Rao , Zhao Jia-Chen , Sun Chun-Lin , Wang Xiao-Zhen , Ding Jing-Jie , Liu Zuo-Ye , Hu Bi-Tao
Published: November 2019

The spectral attenuation of a 400-nm probe laser propagating through a femtosecond plasma in air is studied. Defocusing effect of the low-density plasma is an obvious effect by examining the far-field patterns of the 400-nm pulse. Besides, the energy of 400-nm pulse drops after interaction with the plasma, which is found to be another effect leading to the attenuation. To reveal the physical origin behind the energy loss, we measure fluorescence emissions of the interaction area. The fluorescence is hardly detected with the weak 400-nm laser pulse, and the line spectra from the plasma filament induced by the 800-nm pump pulse are clearly shown. However, when the 400-nm pulse propagates through the plasma filament, the fluorescence at 391 nm from the first negative band system of

N
2
+

is enhanced, while that from the second positive band of neutral N2 at 337 nm remains constant. Efficient near-resonant absorption of the 400-nm pulse by the first negative band system occurs inside the plasma, which results in the enhanced fluorescence. Furthermore, the spectral attenuation of the 400-nm probe laser is measured as a function of the pump–probe time delay as well as the pump-pulse energy.
Quantum interference of a time-dependent wave packet of atom irradiated by an ultra-short laser pulse*
Authors: Yan Wen-Min , Chen Ji-Gen , Wang Jun , Guo Fu-Ming , Yang Yu-Jun
Published: November 2019

The wave packet evolution of an atom irradiated by an intense laser pulse is systematically investigated by using the numerical solution of the time-dependent Schrödinger equation. There are two types of spatial interference structures in the time-dependent evolution of the atomic wave packet. With the increasing of the evolution time, the interference fringe spacing for type I (type II) becomes larger (smaller). As the wavelength of the incident laser increases, the interference of the wave packet is changed from type II to type I, and the shift of interference type can be attributed to the contribution of excited states by using the energy analysis of the time-dependent wave function.
Specific heat in superconductors
Authors: Wen Hai-Hu
Published: November 2019

Specific heat is a powerful tool to investigate the physical properties of condensed materials. Superconducting state is achieved through the condensation of paired electrons, namely, the Cooper pairs. The condensed Cooper pairs have lower entropy compared with that of electrons in normal metal, thus specific heat is very useful in detecting the low lying quasiparticle excitations of the superconducting condensate and the pairing symmetry of the superconducting gap. In this brief overview, we will give an introduction to the specific heat investigation of the physical properties of superconductors. We show the data obtained in cuprate and iron based superconductors to reveal the pairing symmetry of the order parameter.
Vector hidden-bottom tetraquark candidate: Y(10750) *
Authors: Wang Zhi-Gang
Published: November 2019

In this article, we take the scalar diquark and antidiquark operators as the basic constituents, and construct the

type tetraquark current to study Y(10750) with the QCD sum rules. The predicted mass

and width

support the assignment of Y(10750) as the diquark-antidiquark type vector hidden-bottom tetraquark state, with a relative P-wave between the diquark and antidiquark constituents.
Charmonia and bottomonia in asymmetric magnetized hot nuclear matter
Authors: Kumar Rajesh , Kumar Arvind
Published: November 2019

We investigate the mass-shift of P-wave charmonium (

,

), and S and P-wave bottomonium (

,

,

, and

) states in magnetized hot asymmetric nuclear matter using the unification of QCD sum rules (QCDSR) and the chiral

model. Within QCDSR, we use two approaches, i.e., the moment sum rule and the Borel sum rule. The magnetic field induced scalar gluon condensate

and the twist-2 gluon operator

calculated in the chiral

) model are utilised in QCD sum rules to calculate the in-medium mass-shift of the above mesons. The attractive mass-shift of these mesons is observed, which is more sensitive to magnetic field in the high density regime for charmonium, however less so for bottomonium. These results may be helpful to understand the decay of higher quarkonium states to the lower quarkonium states in asymmetric heavy ion collision experiments.
Isolation and identification of potential culturable probiotics bacteria from intestine of Anguilla bicolor
Authors: Peristiwati  , Sanjaya Y , Trinaya C
Published: November 2019

Sidat is high selling price fish and a source earner for the country. Probiotics are living bacteria promoted fish healthy and also produce bacteriocins is useful against several strains of pathogenic bacteria. This research aimed to isolated of probiotic bacteria in Anguila bicolor intestine and determine the characteristics of potential probiotics bacteria. The steps were taking sample in small intestine Anguilla bicolor, examine performed with pour plate and streak plate methods, Gram staining, biochemical Tests and making Bacteria Growth Curve. To get the ability as probiotic bacteria by using a few tests such as the ability in low pH and bile salt. The test of antagonistic ability to pathogen bacteria was used Staphylococcus aureus and Pseudomonas aeruginosa. The result shows that three isolates of Gram positive and have a rod shape. The three isolates characterized by biochemical tests belong to the genus Lactobacillus. They were able growing and surviving on a medium with a pH between 3-6.5 and a medium of 0.05% and 0,1% synthetic bile salt. From the result of the antagonistic ability test show that all isolates have the ability to produce antimicrobial that are bacteriosida against bacterial growth of Staphylococcus aureus and Pseudomonas aeruginosa.
Analysis of biomass estimation and carbon stock on puspa (schimma wallichii korth.) in Talaga Bodas Nature Reserve Garut
Authors: Amalia L , Fadilaty H , Putri D I , Mulyani L S , Hernawati D
Published: November 2019

This study aimed to find out the estimation of Biomass and Carbon Stock on Puspa (Schimma wallichii Korth.) inTalagaBodas Nature Reserve Garut. The uses of this study were to give information about the estimation of Biomass and Carbon Stock on Puspa Stands in Talaga Bodas Nature Reserve Garut and become a consideration in supporting the implementation of carbon trading and its effects on global warming. Descriptive quantitative was used as a method in this study with systematic sampling with a random startas a sampling technique. The making of the plot line using the line plots method that was to make a stub line 100 meters in length and on the stub line a plot of 20 x20 meters, was made in 3 replications. Related to research on estimating biomass in Puspa stands using allometric equations obtained results of 105.741tons/Ha. Carbon estimation using carbon fraction formula yielded 49,7658ton/Ha. The results of the calculation of the Puspa stand density Using the density formula (number of Puspa/area) obtained a result of 328 Puspa/Ha.
Flavonoids from stem bark of akway (Drymis beccariana Gibs) and theirs antimalarial properties
Authors: Herlina T , Rudiana T , Julaeha E , Parubak A S
Published: November 2019

Akway (Drimys beccariana, Gibbs) is a plant endemic to Papua highlands contained in Manokwari. D. beccariana is used for traditional malaria treatment in West Papua. The methanol extract of stem bark of D. beccariana showed antimalarial activity against Plasmodium falciparum parasites, in vitro. Methanol extract of D. beccariana is partitioned between water and n-hexane (1:9), and ethyl acetate. Furthermore, ethyl acetate extract was separated through several combination of chromatography techniques on silica gel, resulting in three known compounds (1-3). The chemical structures of compounds (1-3) were identified based on IR, UV/Vis, 1H NMR and 13C NMR, and MS data as 5,3’-dihydroxy-7,4’-dimethoxyflavone (1), 5,7-dihydroxy-4’-methoxyflavone (2), and 5-hydroxy-7,3’,4’-trimethoxyflavone (3). Compounds 1-3 showed strong antiplasmodium against 3D7 strain of P. falciparum with IC50 values of 0.002, 0.005, and 0.001 micro Molar, respectively. This result indicates that stem bark of D. beccariana is a promising source of antimalarial agents, and merits further investigation.
Dijkstra algorithm for nearest route determination and estimated cost of official travel
Authors: Alam C N , Muzaki F , Irfan M , Dauni P , Ramdhani M A , Rahman A
Published: November 2019

The purpose of this Decision Support System (DSS) design is to analyze the nearest route of a position, which then carried out financing analysis for transportation to the specified location. The design methodology of this study is the Android-based application system by utilizing the mapping of the region on the hardware in the form of a smartphone. The analysis model chosen for this DSS is Dijkstra algorithm. The subject of system user is Coordinator of Islamic Higher Education (KOPERTAIS) region II for West Java and Banten. The design results show the good system capabilities of the system to select and determine the nearest route and estimate the cost of official travel so that official travel can be efficiently done based on the time and cost perspective.
Development of human machine interface for supporting the disaster mitigation system in the city using wireless sensor network
Authors: Najmurrokhman A , Kusnandar  , Syaripudin A , Munir A
Published: November 2019

Disasters that include building fires, earthquakes, and floods are the inevitable things in city life. Disaster mitigation should be undertaken to mitigate the adverse impacts of the disaster. Its activities span from an early warning system until the evacuation of the victim to a safer place. With the advancement of information technology, an integrated system can be built to support the disaster mitigation system in the city. This paper describes a development of a prototype of human machine interface for supporting the disaster mitigation system in the city. This prototype comprises sensors, microcontroller, communication module, and information system to capture and display the disaster location. Three parameters including smoke concentration, room temperature, and vibration are sent to the monitoring room at any time using the wireless sensor network framework. The building fire indicators are rendered by raising a smoke concentration and temperature up to the certain level, while earthquake indicators are provided by vibrations sent by vibration sensors. The location of the disaster site is displayed in the monitoring room and delivered to the city authority who handling the disaster via mobile phone. Disaster management office could work more effective due to the information on disaster locations and types of disasters could be known quickly.
Development of general transportation applications in Garut City web-based
Authors: Nurdiana D , Fajar M , Rahadian D , Sidiq P , Hamdani N A
Published: November 2019

Garut city is one of the cities that is densely packed with transportation, especially on public transportation. The problem is that there are still many people who do not understand the path that the public transportation passes, both in the city itself, outside the city and even foreign tourists. The purpose of developing this application is to find out where to go. In this study, researchers designed and built public transport transportation applications in the web-based city of Garut with the name Garut Anyar utilizing GIS technology in it. The application is useful for searching city transportation routes (Angkot) in Garut City so that users no longer feel difficulties in finding public transport to get to their destination, especially for migrants in Garut City. In addition, this application can display information about angkot routes so that it can add to the user’s insight. The conclusion obtained from this study is the Garut Anyar application was successfully built and useful for every user who has used this Garut Anyar application, which has been tested 100 times a trial from the RSU route to Banyuresmi as evidenced by an application testing questionnaire that gets good grades.
Number of Failures for Weibull Hazard Function witha Fuzzy Shape Parameter
Authors: Husniah H , Widjajani  , Rohmana  , Supriatna A K
Published: November 2019

Number of failures play important role in maintenance strategy for industrial equipment, either repairable or non-repairable ones. There are several form of known distribution used to model the failures of an industrial equipment. Weibull distribution, and its hazard function, is among the most used distribution. Most maintenance models in literature mainly consider certain or crisp condition in a deterministic form. However, many real phenomena seem do not suitable to model in such certain or crisp condition. One approach to model a possibilistic uncertainty is by applying the fuzzy number theory. In this paper, we discuss the Weibull hazard function by assuming a fuzzy shape parameter. We look for the number of failures generating by the function using two different methods. The first one assumes that the fuzziness of the shape parameter propagates to the number of failures with the same form of fuzzy number membership. The second one use the fuzziness of the shape parameter in the computation of the number of failures directly, through the concept of alpha-cut or alpha-level. Some comparisons regarding these approaches are presented.
A new approach solution for fuzzy assignment problem using the development Zimmermann method
Authors: Agustina F , Lukman
Published: November 2019

Transportation problems and assignment problems are special cases of linear programming problems. Puspita, Lukman and Agustina [1] studied about the development of Zimmerman method to solve fuzzy linear programming problems was known as the Zimmerman method of development. The Zimmerman method of development was carried out using the concept of Zimmermann method and Thorani’s ranking function. This paper discusses about solution for fuzzy assignment problems with parameter costs being fuzzy number using the development Zimmermann method that is new method that introduced by Puspita, Lukman, and Agustina [1]. In this article also presents an illustration of a numerical example about the development Zimmermann method for solving fuzzy assignment problems.
Ethnomathematics on Woven Fabric (Tembe Nggoli) of Mbojo tribe society
Authors: Nurbaeti  , Sowanto  , Mikrayanti  , Sarbudin  , Edison
Published: November 2019

This study aims to reveal the relationship of mathematics with a culture that has been considered to be unrelated. This research was conducted on mbojo tribe society in Bima and Dompu districts. The focus of this research was about the weaving activities of the mbojo tribe society that produces the geometry pattern on their woven fabrics (tembe nggoli). The method used in this research was ethnography method with data collection technique that was through observation, interview to the weaver community of tembe nggoli of mbojo tribe society, documentation of geometry forms contained on tembe nggoli, to the making of field notes followed by literature study about geometry. The results of this study indicate that there is a concept of geometry at woven fabric (tembe nggoli) of mbojo tribe society that can be used as a source of learning and make students and the community better understand the relationship between their culture with the concept of mathematics.
Design of temperature measuring instrument using NTC thermistor of Fe2TiO5 based on microcontroller ATmega 328
Authors: Munifah S S , Wiendartun  , Aminudin A
Published: November 2019

Thermistor is one of temperature sensor which works based on resistance changes and can be used as a temperature measuring instrument. In a previous study, an NTC thermistor of Fe2TiO5 was made in the form of raw pellet without doping, sintered at a temperature of 1200°C for 2 hours in oxygen. A thermistor constant value that obtained from the characterization process is 3821.65 K. This result showed that the thermistor has good quality because it has relatively large constant thermistor. Fe2TiO5 is one of semiconductors that used as basic material for main fabrication component of NTCs as temperature sensor. In this study, temperature measuring instrument using NTC thermistor of Fe2TiO5 sensor based on microcontroller ATMEGA 328. The NTC is assembled in parallel with a fixed resistor and then assembled on ICLM741 and microcontroller ATMEGA 328. The magnitude of the resistor varies at 1 MΩ, 2 MΩ, and 3 MΩ with each resistor having a tolerance value of 1%. From these variations we can get sensitivity value with the value of 0.00688 MΩ/°C; 0.0133 MΩ/°C, and 0.02195 MΩ/°C, respectively. As result, this temperature measuring instrument shows good sensitivity when assembled in parallel using 3 MΩ fixed resistor with a tolerance value of 1% and capable of measuring the temperature in the range 26°C – 103.2°C.
The electrical properties characterization of MG-811 gas sensor toward the temperature alteration of soil testing chamber
Authors: Saptiani P , Aziz M H , Iriyanti M , Aminudin A
Published: November 2019

The concentration of CO2 in soil and air is strongly influenced by temperature. When the temperature increase, the thermal energy will increase too and make the particle motion faster. In detecting CO2 gases, the MG-811 gas sensor has a high sensitivity in detecting CO2 gases in the air. The purpose of the research is characterized the electrical properties of MG-811 gas sensor toward temperature alteration. The used method is the experimental method, where the chamber is made of iron filled with CO2 derived from the CO2 gas tube. In the chamber has been paired digital thermometer and MG-811 gas sensor. The temperature alteration in the CO2 gas is regulated by the heater element attached to the chamber. The output of the MG-811 gas sensor will be processed by microcontroller, so it measures the CO2 concentration in units of parts per millions (ppm). The higher the measured temperature on the gas causes faster particle motion, the measured CO2 gas concentration is high and the resulting output voltage is low. But it happens if the temperature changes high, because the gas sensor response is slower than the temperature sensor used.
Characterization of turbidity water sensor SEN0189 on the changes of total suspended solids in the water
Authors: Hakim W L , Hasanah L , Mulyanti B , Aminudin A
Published: November 2019

Turbidity has an indication that the liquid has been contaminated. In the testing process, turbidity in water can only be measured by sampling. To be able to maintain the quality of water, required a tool that can monitor and measure the level of turbidity of water in real time. water turbidity sensor SEN0189 is a sensor that works by measuring the amount of light from infrared led into the phototransistor that will produce the output voltage on the sensor. The study was conducted to be able to characterize the ability of sensors in detecting water turbidity. The method used is to test the sensors using sediment soil that has been filtered with a diameter of <60μm to be added into the pond containing 1 liter of water. The results show that the greater the concentration of sediment dissolved in the water pool the sensor output voltage will be smaller. The sensor has a sensitivity of -0.0008 and the output voltage when the sensor detects 0 NTU is 3.9994 volts with 5V operating voltage and the sensor can detect water turbidity linearly within the test range 1.873 NTU to 1011.93 NTU.
Utilization of the school environment as a learning resource to improve critical thinking skills and scientific attitudes
Authors: Muharam D A M , Munandar A , Sriyati S
Published: November 2019

This study aims to determine the effect of utilization of the school environment as a learning resource in improving critical thinking skill and scientific attitude. This study compares differences in the improvement of critical thinking skills and scientific attitudes between the agricultural and coastal environment. The research method used is quasi experiment method. This design used two experimental groups and two control groups. The experimental and control class I are the experimental and control classes located in the agricultural environment. Experimental and control class II are experiment and control class located in coastal environment. Data collection techniques in this study were conducted through tests. The conclusion of this research is the utilization of the school environment as a learning resource, both in the agricultural and coastal environments can improve critical thinking skill and scientific attitude. However, the improvement of critical thinking skill and scientific attitudes between the agricultural and coastal environment do not have a significant difference.
The Conceptual change of human respiratory system through POE-Based Learning
Authors: Kusnadi K , Lazuardi Z , Surakusumah W
Published: November 2019

Study to analyse the effect of Predict-Observe-Explain (POE)-based learning to the conceptual change of high school students on human respiratory system concept has been done. This study was a weak experimental with one group pre-test and post-test design. The data were obtained by a pencil and paper test in the form of reasonable-multiple choice with two tiered test items. The data were analysed by mean of difference test between pre-test and post-test scores. The finding of study shows that a significant change in the percentage of students scientific conception between pre-test and post-test. The result shows that the increase of student conceptual change with N-gain average is 0.52 (moderate category). In addition, the result also shows that a pattern of student conceptual changes that positive changed is 44.3%, positive survival is 20.5%, negative change is 11%, and negative survival is 24.2% respectively. Based on result shows that POE-based learning strategy can be developed in high school to support students in resolving conceptual change of scientific concept.
Application of corrosion e-module to improve high-level thinking ability
Authors: Subarkah C Z , Ayesha R , Nurhayati A , Nuryantini A Y
Published: November 2019

The media used in learning can be used as an alternative effort to improve the ability of high-level thinking. Therefore, the purpose of this study is to apply corrosion e-module to improve students’ high-level thinking ability. The method used is pre-experiment with research subjects as much as 38 students of Chemistry Education second semester. Information is obtained by measuring the improvement of students’ high-level thinking ability. The n-gain value in cognitive analyzes is 0.639 with moderate improvement category, the cognitive rate is evaluated at 0.543 with the category of moderate increase and the cognitive level created by 0.73 with the high increase category. Overall n-gain students’ high thinking ability is 0.637 with moderate improvement category. This shows the teaching materials in the form of e-module play a role in activating the learning process that impact on learning outcomes. Thus, corrosion learning using e-module can improve students’ high-level thinking ability.
Developing art geometric app based on flash player for student in elementary school
Authors: Irawan A , Syamsiah S , Rangka I B , Niswati Z , Mustika F A , Wibawanti Y , Alamsyah N , Marlina D , Rahayu W , Pinahayu E A R
Published: November 2019

The purpose of research is developed learning mathematics to the matter wake up Three dimensions-based e-learning use macromedia flash. A method of this research is research and development (RnD). The phase that carried out is to identify matter by means of a analyse needs that is in research locations. Next design products which adjusted with needs of material geometric three dimensions. Math teacher and the design do validation to judge feasibility products have been made, repair based on input from validator and to pilot a small scale/limited products. The research was done at student in Elementary School. The results of the study of applications that can help teachers in conducting the process of learning and the teaching material to receive help student’s geometric about three dimensions. Next undergone a try to use the widely, revision of the material further and mass production math as the basis for elementary school.
Application of problem-based learning assisted intelligent learning media to improve the cognitive aspects of students
Authors: Wahyudin  , Riza L S , Efendi R , Muhkarom I
Published: November 2019

Problem Solving is one of the capabilities that must be possessed by students in the department of Software Engineering, this ability is directly proportional to the cognitive abilities possessed by learners. Problem Based Learning Method (PBL) is a proven learning method in improving problem solving ability of learners. To determine the effect of PBL on students majoring in Software Engineering, conducted research on students, using the PBL method that is assisted with learning media. Learners are divided into groups to be given a ‘problem’ to be solved by each group. Educators can provide educators questions that lead to the solution of problems given to learners in the form of materials, scripts or in other forms of learning media. Learning media made with Intelligent Tutoring System (ITS) where this media can guide learners in depth of certain material that has not been mastered. This can be seen from giving media suggestions to learners after doing pretest or posttest. The results of this study can be quite successful with an increase in the gain index of 0.36 that can be categorized as a moderate increase.
Students’ acceptance towards blended learning implementation
Authors: Winarto  , Panjaitan M , Tambunan A P
Published: November 2019

The objective of the inquiry is to observe students’ acceptance towards blended learning implementation. It focuses on students’ perceptions and attitudes towards using easyclass.com as a learning management tool and face-to-face learning. The case study has been conducted among business students in a private university in Medan, North Sumatera. The research employed a quantitative approach based on the Technological Acceptance Model (TAM), and asked the students to answer a questionnaire. They also were interviewed to acquire insights about the blended learning implementation. The study concludes that the students’ awareness and attitudes were encouraging towards the learning management tools in term of the usefulness and the ease of use. However, negative impressions also were underlined during the interview with the students. In summary, blended learning implementation requires an integrated approach where the learning management system is useful and ease to use. Finally, an active participation from both teachers and students is a must in the blended learning implementation.
Using simulation in network security learning
Authors: Nugroho E P , Yuliana R , Junaeti E , Kusnendar J , Prabawa H W , Munir
Published: November 2019

Widespread use of computer networks, opening up opportunities for the emergence of crimes involving computer technology itself. If crime or attacks have occurred, reliable handling is needed to overcome crimes in the internet. In general, simulation can be understood as a representation of imitation of the functionality of a system or process. Preliminary studies related to the development of simulation tools in network security learning show information that simulation in general can increase student involvement. In its development, the simulation media utilizes Fungus 3.7.0 software. Fungus is a package available for engine unity. The feasibility of using simulation media in learning is judged on the basis of an instrument that generally evaluates several important components in learning media, including the availability of information for students, content-structure and navigation, interactivity, and assistance and accessibility technology. The development of network security simulation devices has not been able to ascertain whether the involvement of simulations in the learning process improves students’ cognitive abilities.
Analysis of two-level representation about the heat convection between teachers and pre-service teachers
Authors: Anam R S , Widodo A , Sopandi W
Published: November 2019

The aims of this study are to analyse and compare the two-level representation (macroscopic and microscopic) about the heat convection concepts. This research involves 15 teachers and 33 pre-service teachers. Data gathered using the diagnostic test to explore the two-level representation through verbal and drawing tests. The result shows that at the macroscopic level many respondents have a correct answer but decreased in microscopic level even more at the visualization test, just a few respondents can give a correct visualization according to scientific conception. This research found that all participant is well known about the macroscopic level but they have a lack of knowledge about the microscopic level. This research suggests that to make students more understand about science the learning must give multiple representations to make they understand about scientific phenomena.
The Development of Problem-Based Learning Material for Integrated Science Subject in Primary Teacher Education Program
Authors: Amini R , Helsa Y
Published: November 2019

This research and development aim to develop a learning material for the learning improvement quality of Primary Teacher Education (PGSD) students in Integrated Science subject. The research method used is Borg and Gall model. The research stages are: (a) curriculum analysis, the students’ and teachers’ need analysis, (b) the learning material development stage which is analyzed by experts’ judgment, and (c) the pilot stage. The research instruments are observation sheets, interview guides, validation sheets, teachers and students’ response questionnaires, tests, performance assessment sheets, and attitude questionnaires. The results show that the learning material is valid, practical and effective to improve Integrated Science subject learning quality.
Science education at Islamic university: vision and distinction
Authors: Nasrudin D , Helsy I , Rochman C , Irwansyah F S , Munir  , Mahmud
Published: November 2019

The Indonesian National Qualification Framework Curriculum or often called the KKNI curriculum has forced all universities in Indonesia to equate curriculum content according to national standards, not least the science education curriculum at the Islamic University. This paper wants to describe the characteristics of curriculum and science learning in one of Islamic University in Indonesia. The research method used is descriptive qualitative through stages of science education curriculum analysis, interview with representatives of curriculum development team and Focus Group Discussion (FGD). The results of this study are: (1) there are differences of science content in science education curriculum at Islamic University, either with the similar program or with pure science program in the public university. (2) Islamic content as an indicator of the achievement of the university’s vision and differentiator should not be expressed in a special course, but rather incorporated in the existing courses with the appropriate integration model. (3) The profile of learning achievement of science education students at Islamic University is expressed in three complementary coordinate axes, namely content, pedagogical and Islamic values. This difference in learning achievement affects lecturing activities from planning, implementation to assessment.
Realistic mathematics education with local instruction theory for enhancement students’ procedural fluency
Authors: Nuraida I , Kusumah Y S , Kartasasmita B G
Published: November 2019

This research is motivated by the lack of application of realistic mathematics learning and the low procedural fluency ability in schools. The research objective is to analyse the improvement and achievement of procedural fluency based on students’ initial mathematical abilities in learning reaistic mathematics and LIT. The research method used was design research with two cycles. Population in SMP Negeri 5 Kota Tasikmalaya with sample class XI. The instrument used in this study is the question of the ability of procedural fluency in the form of a description. Data processing uses statistical tests and research results show that realistic mathematics learning with LIT can improve procedural fluency.
E-learning assisted problem based learning for self-regulated learning and mathematical problem solving
Authors: Yaniawati R P , Kartasasmita B G , Saputra J
Published: November 2019

This study aims to analyze the effectiveness of e-learning assisted problem-based learning (PBL) to enhance self-regulated learning and its impact on college students’ mathematical problem-solving. This study used mixed methods research with embedded design by comparing groups of e-learning assisted PBL and conventional learning. The subjects were undergraduate students of mathematics education in Bandung Indonesia. The instruments were a test, questionnaire, interview guidelines, and observation guidelines. The results show that: The mathematical problem-solving ability of students who used e-learning assisted PBL is better rather than those who used conventional learning; The self-regulated learning of students who used e-learning PBL is better rather than those who used conventional learning; There is an influence of self-regulated learning on mathematical problem-solving skill.
Clustering for multi-dimensional data set: a case study on educational data
Authors: Yudhanegara M R , Lestari K E
Published: November 2019

This paper present two-step cluster method to handle data sets in educational data mining. It can handle multi-dimentional metric data points especially in complex data sets. For a case study, we use tracer study data in order to assign a clustering of alumni based on the profile. The result of clustering will help the school to evaluate and improve the quality of its graduates.
Didactical design work sheet of complex variable function based on epistemology, didactical, and learning trajectory to enhance student’s ability for representation and communication
Authors: Sumiaty E , Dedy E
Published: November 2019

One of the important keys to improve undergraduate students’ learning process is by using a good learning material, especially for those who are from mathematics department. In this study, the learning material was developed not merely by considering the characteristic of the materials and supported by appropriate models, methods and approaches. Further than that, it also pays attention on learning obstacles faced by the undergraduate students from both internal and external perspectives. By this way, the learning material was made based on epistemology, didactic, and learning trajectory. This study was undertaken by applying Didactical Design Research (DDR) which has three analytical phases: didactical situation analysis prior; metapedidactical analysis; and retrospective analysis. This study was beginning with problems (concept founding or even concept reinforcement), then the problems was analysed by the students by referring textbook for students and lastly making the teaching guide based on the learning obstacle, didactical, and learning trajectory. After learning process and learning obstacle test was done, an analysis was carried out and it shows that the didactical design successfully improved the undergraduate students’ representation and communication skill. However, it seems that the undergraduate students’ representation skill does not significantly affect to their communication skill.
The van hiele levels of geometric of students in first semester reviewed from gender
Authors: Sudihartinih E , Wahyudin
Published: November 2019

This research is an exploratory study that aims to examine the geometry abilities of students based on gender. Participants numbered 90 people. The number of female students is 72 people and male students are 18 people. Participants are students of biology education programs who attend basic mathematics lectures in the first semester at one of the universities in Indonesia. The instrument of the geometry thinking level used test from CDASSG project. The results showed that from 18 male students as many as 4 people were at the level of pre-visualization, 2 were at level 0, and 12 were at level 1. Whereas of 72 female students, 13 were at pre-visualization level, 21 were at level 0, 34 people are at level 1, and 4 people at level 2. Based on these results there is a difference between male and female students, namely some female students reach level 2, but not male students.
Rigorous Mathematical Thinking: Why are Cognitive Levels Important in Three-Dimensional Learning for Pre-service teachers?
Authors: Firmasari S , Santi D P D
Published: November 2019

Learning material three dimensions is closely related to processing high-level abstract thinking skills. The ability in question is Rigorous Mathematical Thinking (RMT). Some research results do not focus on the relationship of RMT with cognitive levels. The cognitive relationship between RMT is essential because students must have abstraction skills to be able to teach according to the concept. The study aimed to determine the ability of RMT mathematics teacher pre-service based on cognitive levels in a three-dimensional material. The research method is qualitative descriptive because of the use of test sheets and interviews as instruments. The research sample consisted of three students, each with low, medium and high cognitive abilities. Research has resulted in the ability of prospective RMT mathematics teachers to have a close relationship with their cognitive level. High-level RMT students can link the three-dimensional concepts of the Pythagoras theorem, great line propositions, angular definitions, the definition of squared angles, and several trigonometric principles. Medium RMT, able to sort diagonal concepts until the trigonometric proposition is systematic. A low RMT can label a right triangle and cube side. The results of this study are the basis for giving appropriate treatment to students before carrying out teaching practices.
Developing of teaching materials for junior high school students based on ethnomathematics on traditional woven cloth (Tembe Nggoli) of Mbojo tribe
Authors: Sowanto  , Mulyadin E
Published: November 2019

This research is based on the absence of teaching materials about the concept of geometry that is able to facilitate the students connecting the culture, especially tembe nggoli which is one of the traditional woven cloth of mbojo-NTB with the concept of mathematics. Ethnomathematics is a mathematical bridge with culture, and ethnography recognizes the different ways of doing mathematics in community activities. The result of this study is to produce teaching materials in the form of students’ worksheets. The method used is design research which includes: (1) preliminary design, in this phase is made Hypothetical Learning Trajectory (HLT); (2) experiments, in this phase existing designs are tested to students; (3) retrospective analysis, in this phase the researchers compare the HLT with the actual student learning process. The results of this research showed that tasks which were presented in teaching materials by considering learning obstacle and preliminary study able to facilitate students to define the properties of triangles based on their angle.
Comparative study of laboratory management capability among physics students at UIN Sunan Gunung Djati and UIN Sunan Kalijaga
Authors: Chusni M M , Hasanah A , Ghazali A M , Zakwandi R , Nurzaman R F R , Nurfauzan M F , Dirgantara Y , Agustina R D , Malik A , Samsudin A
Published: November 2019

The aim of this research is to compare the laboratory management capability of the students in the physics education department at UIN Sunan Gunung Djati Bandung and UIN Sunan Kalijaga Yogyakarta. The research method is used comparison method between two groups subject. The comparison is doing to describe the readiness of physics education department to prepare their students become a professional pre-service physics teacher. Subjects in the research are students of physics education department at UIN Sunan Gunung Djati and UIN Sunan Kalijaga that choice used purposive sampling method. The data of management laboratory capability were collected by spreading the instruments in the form of a multiple choice test and analyze used t-test method. Result of the study show that sig 0,488 > 0,05 that indicated the subjects have not differences. The analyze of the levels of difficulty is shown that each of the subjects group does not have a significant difference in value. Generally, the researchers conclude that not have significant differences among the student capability. Other than, this study also indicates that the lecture of management laboratory must be improved to increase the levels of graduation capabilities.
An investigation of students’ misconceptions about momentum and impulse through interactive conceptual Instruction (ICI) with computer simulation
Authors: Triyani G , Danawan A , Suyana I , Kaniawati I
Published: November 2019

Learning of physics always related to conceptual understanding. In the learning process, there can be a difference in conceptual understanding that causes misconceptions. Misconceptions can occur in a variety of physics material, including on momentum and impulse. The purpose of this study was to investigate students’ misconceptions about momentum and impulse through Interactive Conceptual Instruction with computer simulation. This study was conducted to 10th grade consists of 30 students. The sampling technique is purposive sampling. The method used is quasi-experimental with research design is one group pre-test and post-test. The instrument used to investigate students’ misconceptions is form four-tier diagnostic test. The result shows that misconceptions before treatment higher than after treatment. It can be concluded that Interactive Conceptual Instruction with computer simulation is better in facilitating student learning process on momentum and impulse.
Implementation of levels of inquiry to improve sound wave concept mastery in junior high school
Authors: Ariantara R G , Utari S , Karim S
Published: November 2019

The low mastery of physics concept was caused by a lack of experimental abilities in the learning process. Levels of Inquiry (LoI) is an appropriate step for develop experimental abilities because it has a systematic, structured stages, and it can flexibly applied to the various dominancy of students and teachers role according to conditions. This study was conducted to observe students sound wave concept mastery improvements after the implementation of LoI in learning. The study used one group pretest-posttest design, which involved 152 students in one of public junior high school in Bandung. Instrument used in this study was descriptive concept mastery test. Data were analyzed using t-test and normalized gain to determine the improvement of student’s mastery concept. The results showed that students sound wave concept mastery improvement was improved by Levels of Inquiry in overall ( = 0.38). The results also included detailed analysist of student’s concept mastery development by general, each cognitive aspect and each sub matters of lesson. Based on the results, Levels of Inquiry (LoI) implementations can improve the student’s concept mastery on sound wave.
The development of PDEODE*E task based three stay two stray on static fluid
Authors: Rahmi RA , Samsudin A , Imansyah H
Published: November 2019

Misconception occur due to several factors, including students, teachers, content of book or teaching materials, and learning models and strategies used. Learning models and strategies greatly affect to the ability of student’s understanding of the concept. Low conceptual understanding can easy make the students being misconception. Therefore, the purpose of this research was to developing PDEODE*E task based one of cooperative learning model type on static fluid material. This research used 4D method (Define, Design, Develop, Disseminate) and this research restricted on static fluid conceptual. Participant in this research are 25 XI grade students on science program. This research used effect size to analyze the impact of PDEODE*E task based three stay two stray to reduce the students’ misconception. Results shown that the value of effect size is 1.09 with “large effect” interpretation. It’s mean that PDEODE*E task based three stay two stray is effective to use on learning activity in the classroom to reduce student’s misconception on static fluid.