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1051	Physics	ABS-644
The simulation of granular attachment on the porous vertical surfaces Dewi Muliyati, Dadan Sumardani, S Siswoyo, S Viridi, F Bakri, E Handoko, H Permana Physics Education Department, Universitas Negeri Jakarta Abstract Granular simulations have been carried out to visualize attached to porous vertical surfaces. We simulate the optimal ratio of dry surfaces. This simulation uses the uFlex particle with three pore sizes. The movement particle using parabolic motion with the initial horizontal speed only. The simulation results show that for uniform particle velocities, the number of particles that are attached depends on the size of the particle sphere itself. These results can combine with the previous study to use in future research. Keywords: granular attachment, vertical porous surface, granular simulation Share Link | Plain Format | Corresponding Author (Dewi Muliyati)

1052	Physics	ABS-901
Analysis of Concept Understanding and Skill of Problem Solving on Circular Motion Topic using Creative Problem Solving Model with Kahoot (CPS-K) H Y Pratiwi (a), A Jufriadi (a), C V Trisilawati (a), H D Ayu (a) and Sujito (b) (a) Universitas Kanjuruhan Malang (b) Universitas Negeri Malang Abstract Technology development in 4.0 industrial revolution era demands students to have 21st century skills, one of them is the skill to solve problems. The aim of the research is to describe and analyze the concept understanding and skill of physics problem solving on circular motion topic using creative problem solving with Kahoot (CPS-K) model. The research was conducted in one of State High Schools in Malang. The sample consisted of sixty eight students divided into one experiment class group and one control class group. The technique of data collecting used test of concept understanding in the form of multiple choices and test of problem solving in the form of problem analysis. The data analysis used two-ways anova. The result of the research shows that there are; concept understanding of students that are taught using CPS-K is higher than using Problem Solving (PS) model, (2) concept understanding of students who have high and low problem-solving skills that are taught using CPS-K is higher than using PS model. Keywords: Concept understanding, problem solving, creative problem solving Share Link | Plain Format | Corresponding Author (Hestiningtyas Yuli Pratiwi)

1053	Physics	ABS-647
Early Tests of Background-Oriented Schlieren Imaging Based on a Non-Intrusive Detection Margi Sasono (1*), Setyawan P. Sakti(1*), Johan A.E. Noor (1*), and Hariyadi Soetedjo (2*) 1. Department of Physics, Brawijaya University, Jl Veteran, Malang 65145, Indonesia 2. Department of Physics, Ahmad Dahlan Unversity Yogyakarta Abstract Optical imaging has developed rapidly for various applications, particularly in medicals and industrials. This technique is considerably interesting due to some safety reasons, such as non-radiative, non-intrusive, and non-contact. Currently, optical imaging based on the schlieren technique has been widely used to visualize the change in the refractive index of air. The main advantage of this technique provides a means to visualize invisible physical phenomena, such as shock waves, thermal plumes, and optical imperfections. In this research work, a Background-Oriented Schlieren (BOS) technique was introduced as a new variant to the family of schlieren techniques. The BOS technique has inexpensive and easy-to-use optical setups. In this paper, the early test of developed BOS technique had been carried out to visualize of thermal plume produced by a warm surface of objects such as candles flame and hot plate. These objects were placed between background patterns (imaged target) and a digital camera in the home-made BOS apparatus. There was hot air buoyancy over a warm surface, and these phenomena resulted in a change in the refractive index of air. A digital camera captured these phenomena as a distorted image of background. Thus, the BOS technique can produce a visualization of thermal plume after the post-processing of the images. This result was potential to be used as metrological tools, such as in the visualization of ultrasound fields in the quality assurance (QA) of medical therapeutic devices. Keywords: optical imaging, background-oriented, schlieren, non-intrusive detection Share Link | Plain Format | Corresponding Author (Margi Sasono)

1054	Physics	ABS-649
The Effectiveness of breakwater shape: fluid particle behavior simulation Dewi Muliyati, Dadan Sumardani, S Siswoyo, F Bakri, E Handoko, H Permana Physics Education, Universitas Negeri Jakarta Abstract The simulation of physical phenomena between fluid and its boundary is a very interesting study because of its application in various fields of engineering. In this simulation, we analyze how fluids are arranged as granular particles with certain conditions interacting with the wall. The walls are varied as the characters that represent the shape of the breakwater building. This simulation compares the effectiveness of commonly used wave barriers. Wave barriers are used to hold the waves from reaching the land. In this, the simulation used two types of wave holders in the form of tetrapod and cubic, which are placed on a sloping surface. Next, an analysis of the farthest distances from the variations in the speed of the waves and the types of waves holds. Simulation results show that tetrapods are able to withstand wave speeds better than cubic. Keywords: simulation breakwater, fluid-particle simulation Share Link | Plain Format | Corresponding Author (Dewi Muliyati)

1055	Physics	ABS-905
Crystal Structure Analysis of Lanthanum Orthoferrite doped Zirconium with Sol-Gel Method for Solar Cell Candidate Ismi Purnamasari (a*), Ida Farida(a), Nanang(a), Athaya Zhafirah(a) a Department of Civil Engineering, Sekolah Tinggi Teknologi Garut Jalan Mayor Syamsu 1, Garut 44151, Indonesia ismipurnamasari55[at]gmail.com Abstract Lanthanum Orthoferrite (LaFeO3) is one of the perovskite material which has been studied as a candidate for solar cells. Perovskite doped at site-A and site B was expected to increase efficiency in its application as a solar cell. Zirconium as doping at site-B on LaFeO3 used to reduce the size of crystals with nano size. Therefore, this research has synthesized perovskite lanthanum orthoferrite doped zirconium at site-B (LaFe1-xZrxO3 with x=0.075, 0.1 and 0.15) by the sol-gel method and it has not been studied before. The precursors for these materials are lanthanum Oxide (La2O3), Zirconium (IV) chloride octahydrate (Cl2H12O9Zr), iron nitrate nonahydrate (Fe (NO3) 3.9H2O). LaFeZrO3 powder was characterized using XRD to test the crystal structure properties. The results say that the sample has an orthorhombic structure with Pnma space group. The XRD data has been refined and shows that the lattice parameters for 0.075, 0.1 and 0.15 increase with increasing zirconium concentration and crystal size of LaFeZrO3 decreasing and showing nanosize. Nanosize crystals can maximize the absorption of dyes and it can increase the efficiency of solar cells Keywords: LaFeZrO3; Sol-Gel Method; structure properties Share Link | Plain Format | Corresponding Author (Ismi Purnamasari)

1056	Physics	ABS-402
Effect of Color Variations (Background and Letters) on Current Sources in Running Text P.10 Full Color W Setya* and A Novia Department of Physics Education, Universitas Islam Negeri Sunan Gunung Djati Bandung, Jl. AH. Nasution 105, Bandung 40614, West Java, Indonesia. *suratwindasetya[at]uinsgd.ac.id Abstract The development and advancement of technology are increasing rapidly, especially in the electronics field to convey information. Running text boards are one of the technologies that are considered efficient to attract the attention of the public in conveying information in public places. The purpose of this study was to determine how the influence of current sources on variations in background color and font color variations in running text P.10 full color. This research was conducted by varying 6 colors (background and letter writing) on the flow. Based on the data obtained, it shows that the color combination shows the number of different currents. the highest current is generated by a white background, especially yellow writing of 4.4 amperes and the lowest current by a black background, especially blue writing of 0.44 amperes. Keywords: current sources, color variation, physics, running text Share Link | Plain Format | Corresponding Author (winda setya)

1057	Physics	ABS-403
Design an indoor LED videotron screen with a microcontroller HD-U60-75 W Setya* and D N Fariha Department of Physics Education, Universitas Islam Negeri Sunan Gunung Djati Bandung, Jl. AH. Nasution 105, Bandung 40614, West Java, Indonesia. *suratwindasetya[at]uinsgd.ac.id Abstract The digital world especially electronics is developing rapidly to be able to display a detailed and realistic visual. Videotron provides a visual display that can display a blend of images clearly and in detail so that it becomes a choice in conveying more interesting information. The price is relatively expensive so this research aims to design a Videotron and observe the effect on the current source needed. This research method is by looking at the current generated from 6 variations of background color and panel variations in series. The results obtained indicate that the color variations and the number of panels used to affect the current source. The blue color requires the lowest current in the number of panels and the white color requires the most current in the number of panels. Keywords: HD-U60-75, LED, microcontroller, running text, videotron Share Link | Plain Format | Corresponding Author (winda setya)

1058	Physics	ABS-148
Analysis of Problem Solving Laboratory : Series dan Parallel Circuits Using Resistors, Capasitors and Light Emitting Diode Herni Yuniarti Suhendi1, Muhammad Dwi Putra Rusmawijaya1*, Muhammad Haidir1, Diah Mulhayatiah1, Dindin Nasrudin1, Adam Malik1 UIN Sunan Gunung Djati Bandung Abstract This Parallel-Series capacitor circuit experiment was carried out with the aim of analysing the ratio of current and voltage values of capacitors arranged in a series-parallel circuit, determining the total charge Q total in a parallel series circuit. This ecperimenet uses the principle of project board work. The method used in this experimenet is the Problem Solving Laboratory Practicum Method. Data Analysis was performed using quantitative and qualitative approaches which included several namely selection and clarification of data, data processing data calculation and drawing conclusions. From the calculation of the data obtained a large load on the circuit is 4,82 x 10-3 c, in the series circuits and the parallel circuit the large load obtained on the circuit is 3 x 10-3. The conclusion obtained in this study that the value of the charge stored in a capacitor circuit is inversely proportional to the voltage value in the circuit, the capacitance value of the capacitor circuit is greater in the series circuit. Based on the experiments that have been carried out, it can be seen that the light in a circuit is influenced by the voltage and the stored charge. Using problem solving laboratory is very suitable for use in this practicum Keywords: problem solving laboratory, electronica, Resistors, Capasitors and Light Emitting Diode Share Link | Plain Format | Corresponding Author (Herni Yuniarti Suhendi)

1059	Physics	ABS-411
The Terminal Velocity and Oil Viscosity measurement using Tracker motion analysis Primaswari Eka Anggraini, Aidha Ratna Fajarini Sidik, Sarah Puspitasari, Bebeh Wahid Nuryadin* Department of Physics, UIN Sunan Djati Bandung Abstract The purpose of this study is to measure the viscosity of the fluid (oil) using the concept of terminal velocity and tracker motion software. Experiments carried out by dropping the ball (glass and iron) into the fluid, which was observed using a digital camera on a Smartphone. Then, video observation Tracker 5.1.1 is processed using software to position and velocity data obtained with respect to time. The observations show that the position curve with respect to the time for the ball to fall on the fluid has a non-quadratic pattern, even almost linear. In addition, the speed analysis shows that the motion of the ball will reach the speed of the ball terminal, which is influenced by the size and mass of the different ball. The effect of the size and mass of the ball is related to the total force involved, namely the gravity, buoyancy and fluid friction. This research is expected to increase students understanding of the concepts of mechanics and fluid characteristics in school or university laboratories. Keywords: Viscosity measurement, terminal velocity, concept of force, Tracker 5.1.1 software Share Link | Plain Format | Corresponding Author (Bebeh Wahid Nuryadin)

1060	Physics	ABS-158
Application of Parabolic Motion on Coins Probability Simulation winda setya (a*) a) Department of Physics Education, Universitas Islam Negeri Sunan Gunung Djati Bandung, Jl. AH. Nasution 105, Bandung 40614, West Java, Indonesia. *suratwindasetya[at]uinsgd.ac.id Abstract The progress of Science and Technology (Science and Technology) now makes it easy to make an abstract application that is easy to understand, for example probability theory. Probability theory addresses the chance factor. This theory will be more easily understood by conducting experiments. The simulation will provide a digital picture of the experiment and shorten the time of its implementation. This study aims to understand the concept of probability by simulating a maximum of 4 coin tosses and seeing the results of its calculations experimentally and analytically. The method used to make a coin toss simulation is to use a parabolic motion trajectory with small angles with variations in speed to traverse its trajectory, simulate the motion of a coin using rotational motion on its axis, and the results of the calculation of the probability of a coin toss are carried out by computer randomly. The results of the calculation analysis and the coin toss experiment show the same results if done at least 20 times the number of possibilities that occur. The greater number of coin tosses will produce the same calculation value both experimentally and analytically. Keywords: Parabolic Motion, Physics, Probability, Simulation Share Link | Plain Format | Corresponding Author (winda setya)

1061	Physics	ABS-926
Feature Extraction of Engine Sound by Fast Fourier Transform Technique. Mutia Delina (a*), Panji Ahmad Nurhusni (a) a) Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta, Jl Rawamangun Muka No 1, Jakarta Timur 13220, Indonesia *mutia_delina[at]unj.ac.id Abstract This research aimed to study the feature of engine sound from various exhausts by the Fast Fourier Transform technique. The engine sound was extracted into three different features; energy, entropy, and zero-crossing rate. The energy and entropy were applied to recognize if the sound came from the exhaust or not. The zero-crossing rate was used to distinguish the exhausts into the ordinary exhaust or the racing exhaust. The result showed that the crossing rate of ordinary exhaust was 0.05 to 0.1 while the racing exhaust was below 0.05. Keywords: Fast Fourier Transform, Feature Extraction, Engine Sound Share Link | Plain Format | Corresponding Author (Mutia Delina)

1062	Physics	ABS-166
Determination of refractive index on three medium based on the principle of refraction of light A Malik1, D Mardianti1, D Nurlutfiah1, D W Izzah1, D Mulhayatiah1, D Nasrudin1 and H Y Suhendi1 Prodi Pendidikan Fisika, UIN Sunan Gunung Djati Bandung, Jl. A.H. Nasution No. 105. Bandung, Indonesia 40154 Abstract This study aims to develop a tool to determine the refractive index in three media based on the principle of light refraction. The method used is an experimental method. The results showed the refractive index values of the three media are quite accurate when compared to the absolute refractive index. The relationship of the angle of the incident ray is directly proportional to the angle of the refractive ray. The angle of light produced will be greater if the value of the given beam angle is greater. Thus, the set of refractive index laboratory tools developed is said to be good and suitable to be implemented in schools to explain the concept of the refractive index of light. Keywords: refractive index, medium, refraction Share Link | Plain Format | Corresponding Author (Adam Malik)

1063	Physics	ABS-939
AN ANALYTICAL GENERALIZED RECIPROCAL METHOD (GRM) FOR NEAR-SURFACE SEISMIC REFRACTION INVESTIGATIONS Lasmita Sari (1*), Wahyu Srigutomo (2), Rizal Adimayuda (1), Dini A(1), S Gumilar(1) and Irma.F.Amalia(1) 1 Department of physics education, Institut Pendidikan Indonesia, Jl. Pahlawan No.32, Garut 44151, Indonesia 2 Department of Physics, Bandung Institute of Technology Jalan Ganesha 10, Bandung 40132, Indonesia Abstract Seismic refraction is one of the active seismic methods that work based on seismic waves that are refracted following the layers of the earth beneath the surface. Based on the data acquisition sketch obtained, the acquisition is carried out using the In-Line technique. There are two sources of vibration chosen, namely at the forward and reverse points, the distance between the 5-meter geophone and the distance between the source of the vibration and the geophone of 5 meters. The seismic data processing technique used in this study is the Generalized Reciprocal Method (GRM). This method determines the value of analysis, XY Optimum distance, time-depth analysis value, and depth. In interpreting seismic data, the calculation results that have been made are validated for accuracy using Software. From the research that has been done, it can be known as modeling subsurface structure. There are three layers, the first layer is 6 m-10m deep, while the second layer is 18m-22m deep. In the range of about 0m-20m, the first layer has a velocity of 507.74 m/s, the second layer has a velocity of 1420.43 m/s and the third layer has a velocity of 2522.30 m/s. In the range of about 20m-80m the first layer has a velocity of 550.12 m/s, the second layer has a velocity of 1575.11 m/s and the third layer has a velocity of 2607.45 m/s. In the range of about 80m-100m, the first layer has a velocity of 482.34 m/s, the second layer has a velocity of 1301.09 m/s and the third layer has a velocity of 2400.86 m/s. Keywords: Seismic Refraction, Generalized Reciprocal Method, Velocity Analysis, XY Optimum, Time-Depth Analysis. Share Link | Plain Format | Corresponding Author (Lasmita Sari)

1064	Physics	ABS-173
The Application of Video Based Laboratory in Vibrations and Waves Concept Herni Yuniarti Suhendi1*, Diah Mulhayatiah1, Dindin Nasrudin1, Chaerul Rochman1, Ryan Ardiansyah UIN Sunan Gunung Djati Bandung Abstract Limited laboratory use and that not all the concepts of physics can be done in the laboratory make researchers use video as an experiment. The aim of research is to know the process of using a video-based laboratory in vibration and waves concept. This video-based laboratory consists of self-recorded videos and an application to investigate motion in videos, namely Tracker. The first thing to do is record the pendulum drag motion, then the motion was analyzed using Tracker to determine the amplitude versus time relation (X(t), Y(t)). The pendulum drag motion experiment show that we can learn the concept of vectors from a amplitude versus time relation data (X (t), Y (t)). This research is expected to improve the quality of physics learning by presenting exciting and flexible experiments for students, teachers, and instructor. Keywords: laboratory, tracker, vibration and waves, experiment Share Link | Plain Format | Corresponding Author (Herni Yuniarti Suhendi)

1065	Physics	ABS-944
PUFF LAGRANGIAN METHOD FOR SIMULATING THE VOLCANIC ASH DISPERSION Mutia Delina (a*), Tangguh Sudiro Oktafiandariento (a), Riser Fahdiran (a) a) Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta. Jl. Rawamangun Muka No 1, Jakarta Timur 13220, Indonesia. *mutia_delina[at]unj.ac.id Abstract Volcanic ash was dangerous for aviation because it could ruin the plane engine. This study built a simulation of volcanic ash dispersion by combining the PUFF and Lagrangian methods. These combination methods gave a better result because it included the advection, diffusion, and sedimentation vector, the geographic factor, wind area, eruption time and duration, lifetime particle in the air. The simulation was done by calculating the area ratio (AR) and the angular deviation (α). The simulation results were also compared with the satellite image from Volcanic Ash Advisory. The result showed that these combination methods were able to model the volcanic ash dispersion with a high-resolution image. Keywords: PUFF, Lagrangian, Volcanic Ash Share Link | Plain Format | Corresponding Author (Mutia Delina)

1066	Physics	ABS-178
Physics Concepts on Hydroponic Practices in Schools Chaerul Rochman1, Dindin Nasrudin1, Ida Farida1, and Adam Malik1 UIN Sunan Gunung Djati Bandung Abstract Hydroponic plant cultivation is part of the achievement of SDGs in the area of food independence. The cultivation of this plant must be carried out with educative and productive hydroponic practices in the school environment. This study aims to analyze the concepts of physics in the practice of hydroponic cultivation in schools. The method used was participatory experiments, where researchers and respondents interacted directly in the process of hydroponic practice. The Sample used was 65 secondary school students in Bandung. The instrument used was in the form of a checklist of 20 questions. about the processes, concepts, contexts and attitudes of students towards hydroponic practices. This research shows that the students scientific literacy ability is still low on hydroponic practice. Based on the results of this study, it is necessary to master the integration of physics concepts in food and other practices Keywords: Cultivation of food crops, Concept integration, Physics Literacy, and Hydroponic Practice. Share Link | Plain Format | Corresponding Author (Chaerul Rochman)

1067	Physics	ABS-434
Distribution and Abundance of Macroplastic at Musi Estuary, South Sumatera, Indonesia G Almiza (a) and M P Patria (a*) (a) Department of Biology, Faculty of Mathematics and Natural Science (FMIPA), Universitas Indonesia, Depok 16424, Indonesia Abstract Musi River in the upstream and estuary is used for fisheries, transportation, industry, and settlement. These activities has potential to produce plastic waste with various types and sizes, one of them is macroplastic (2,5-100 cm). This study aims to determine the distribution and abundance of macroplastic in the upstream and estuary of the Musi River. This study used a purposive sampling method with 6 stations, 2 stations in the upstream and 4 stations in the estuary. Macroplastic sampling used transect quadrants then sample is cleaned and dried, counted, identified and weighed for each type. And for macroplastic coverage by taking photos of each transect quadrant, then calculate the percent of coverage using the Point Intercept Transect (PIT) method. The results of this study indicate that the macroplastic abundance in the upstream and estuary of the Musi River ranges from 5-32 items/m2 with an average weight of 27,82 – 126,89 gr /m2. Macroplastic types are dominated by bottle & containers caps, food wrappers, and cups, while macroplastic coverage is dominated by bags/films. Keywords: macroplastic; distribution; abundance; coverageage; Musi Estuary Share Link | Plain Format | Corresponding Author (Gustrilea Almiza)

1068	Physics	ABS-445
Development of web-based learning media for physics materials using Moodle in high school Aida Afrilia, Fakhurrozi Rusli, Tanti Faculty of Teaching and Education and Faculty of Science and Technology, UIN Sulthan Thaha Saifuddin Jambi Abstract . Education systems in various countries have experienced massive transformation since the development of information technology. The learning environment has shifted from face to face learning to web-based education or e-learning. There are multiple free online learning platforms available on the internet, one of which is Moodle. The main of this study is to develop physics learning media with Moodle to improve students motivation in learning physics. The ADDIE model framework is used to create web-based physics learning media, which consists of four stages, namely analysis, design, develop, implement, and evaluation. The product was validated by material and media experts, as well as two physics teachers as practitioners. The validation and practicality test results show that the web-based learning media is valid and practical as teaching media to improve students motivation in learning physics. The results of the effectiveness test using the design of one class pre-test and post-test showed an increase in students motivation with an N-gain value of 0.80 with categories high. Keywords: moodle, e-learning media, physics, motivation Share Link | Plain Format | Corresponding Author (Tanti Tanti)

1069	Physics	ABS-964
Measurement System Development of Refractive Index, Salinity and Magnetic Field Parameters on Liquid Waste Polluted Water Widyaningrum Indrasari, Umiatin, Novita Fitriani Program Studi Fisika, FMIPA, Universitas Negeri Jakarta Abstract A Prototype of liquid waste polluted water measurement system based on refractive index, salinity, and magnetic field parameters, has been developed. The instrument consists of potensiometer, Light Dependent Resistor (LDR), conductivity sensor, Hall Effect sensor and microcontroller. Potentiometer and LDR sensors are used to measure the refractive index, conductivity sensor as the salinity measurement device, Hall Effect sensor as a magnetic field detector and Arduino UNO as the control system. Each sensor has been characterized using a standard measuring instrument to determine sensor sensitivity. The characterization results showed that the refractive index sensor has a sensitivity of 321.8 mV/refractive index unit and relative error of 0.35%. The conductivity sensor has a sensitivity of 415.2 mV/ppt and relative error of 5.26%. The magnetic field sensor has a sensitivity of 0.0077 Volt/Gauss and relative error of 4.29%. The prototype was used to measure the water quality of an artificial wastewater and river water samples. The artificial wastewater was made of the composite of water, salt and liquid soap with different concentrations, and the river water samples were taken from ten different regions. The results show that the addition of salt and liquid soap concentration was directly proportional to the refractive index, salinity and magnetic field. Keywords: Liquid waste, salinity, refractive index, conductivity sensor, magnetic Share Link | Plain Format | Corresponding Author (Widyaningrum Indrasari)

1070	Physics	ABS-197
design of simple harmonic sultry (GHS) devices based on IR obstacle sensors D N Fariha, W Setya* and W Handayani Department of Physics Education, Universitas Islam Negeri Sunan Gunung Djati Bandung, Jl. AH. Nasution 105, Bandung 40614, West Java, Indonesia. *suratwindasetya[at]uinsgd.ac.id Abstract The development of science and technology is inseparable from the availability of hardware and software. One of its uses is teaching aids in physics practicum, especially simple harmonic motion. Digital technology can shorten the time in the implementation of practicum in the field. This study aims to design a simple harmonic motion practicum tool using Arduino-Uno based on IR obstacle sensors. Data is collected using a small angle of 100 with variations in the number of waves and time obtained. The results will be displayed on the LCD. This study also compares the results of recording digitally and analytical calculations. Based on the data obtained, the digital calculation is almost the same as the analytical calculation and shows a constant gravity value. Keywords: arduino-Uno, GHS, IR obstacle sensors, simple harmonic sultry Share Link | Plain Format | Corresponding Author (winda setya)

1071	Physics	ABS-198
Design and build smartphone-based object balance applications K Abdullah, T S Putri, and W Setya* Department of Physics Education, Universitas Islam Negeri Sunan Gunung Djati Bandung, Jl. AH. Nasution 105, Bandung 40614, West Java, Indonesia. *suratwindasetya[at]uinsgd.ac.id Abstract The transformation of Technology and Information today is very fast. This progress makes it easy to be able to make the media. The concepts of physics that are known to be very abstract and difficult can be easily understood by providing a visual representation using a smartphone so that it can be learned anywhere and anytime. The research aims to design a media to make it easier to understand the concept of equilibrium of rigid bodies. The research method used is descriptive analysis method with observation techniques. The results of this study are in the form of media containing material, videos, simulations, examples of problem-solving, and evaluations that are designed in such a way as to attract users in understanding the concept of equilibrium of rigid bodies. Keywords: object balance, smartphone Share Link | Plain Format | Corresponding Author (winda setya)

1072	Physics	ABS-199
THE EFFECT OF THE MONTH PHASE ON PHYSICAL PARAMETERS IN MUARA RIVER W Setya* and E Paujiah Department of Physics Education, Universitas Islam Negeri Sunan Gunung Djati Bandung, Jl. AH. Nasution 105, Bandung 40614, West Java, Indonesia. *suratwindasetya[at]uinsgd.ac.id Abstract Light from the sun is the need for living things both on land and in the air. The moon as a medium that reflects sunlight in one month has several phases. This phase affects the situation on earth, especially river mouths. The purpose of this study is to determine the effect of the moon phase on physical parameters (water temperature, air temperature, wind speed, and light intensity) at the river mouth. This research was conducted in 4 moon phases in the day and night on the physics parameters at 3 coastal estuaries. Based on the results of the study it was found that the moon phase of the physical parameters is very influential on the number of micro-organisms. The number of organisms in each estuary also shows different characteristics according to moon phase conditions. Keywords: light intensity, MONTH PHASE, PHYSIC, temperature, wind speed, Share Link | Plain Format | Corresponding Author (winda setya)

1073	Physics	ABS-200
Current Characteristics and Building Design Full Color Running Text based on microcontroller HD-U60-75 W Setya* and N F Rizaldi Department of Physics Education, Universitas Islam Negeri Sunan Gunung Djati Bandung, Jl. AH. Nasution 105, Bandung 40614, West Java, Indonesia. *suratwindasetya[at]uinsgd.ac.id Abstract The importance of information media in public places becomes a need to provide a recipient of information. The technology that is often used in running text. The purpose of this study is to design running text P.10 and P.05 full color and to determine the current characteristics based on the chosen color background. This research method by looking at the characteristics of the flow produced on each color background selected on the running text that has been designed and comparing the results obtained. Based on the measurement results, it is obtained that running text P.10 and P.5 both one panel or 2 panels have the same character of the current required, the current is increasing based on the background color of blue, green, red, purple, yellow, and white. Keywords: Current Characteristics, HD-U60-75, microcontroller, Running Text Share Link | Plain Format | Corresponding Author (winda setya)

1074	Physics	ABS-202
Physics in processing Ficus carica leaves as traditional medicine K H Nursamsika, R Zakiyah, M F Millah, D Nasrudin, W Utami, and A Malik UIN Sunan Gunung Djati Bandung Abstract There are many benefits to the Ficus carica plant. Apart from being a fruit with high nutritional content and a source of antioxidants, Ficus carica leaves can also be processed into traditional medicinal ingredients. This paper wants to reveal the physical processes and concepts in processing Ficus carica leaves into conventional medicine. This research is a field study using the method of observation, interviews, and strengthened with literature studies. The results showed that some many physical processes and concepts can be revealed in the process of making traditional medicines based on Ficus carica, such as the process of picking, drying, and pounding. The physical concepts involved include temperature, heat radiation, pressure, etc. There are many physical phenomena in daily life that can be raised as a learning context to bring physics closer to the community. Keywords: Contextual physics, Ficus carica, Traditional medicine Share Link | Plain Format | Corresponding Author (Dindin Nasrudin)

1075	Physics	ABS-461
Development of Animation-based learning media to increase student’s motivation in Learning Physics Dedi Sastradika(a*), Iskandar(a), Boby Syefrinando(b), Fauzan Shulman(b) a) Faculty of Science and Technology, UIN Sulthan Thaha Saifuddin Jambi *dedisastradika[at]gmail.com b) Faculty of Teaching and Education, UIN Sulthan Thaha Saifuddin Jambi Abstract The difficulty of students in understanding concepts in physics has a significant effect on students motivation. The purpose of this study is to develop animation media that make students easier to understand the abstract concept of Newtons law and find out students responses to the use of instructional media. The 4D framework is used to develop animation based learning media, wich consists of four-phase, namely: define, design, develop, and disseminate. The instruments used are a questionnaire and interviews. The results showed that the use of media animation in learning physics could facilitate students in understanding the abstract concept of Newtons Law, especially in describing the direction of the force and can increase student motivation. Keywords: Media Animation; Studens Motivation; Physics Learning Share Link | Plain Format | Corresponding Author (Dedi Sastradika)

1076	Physics	ABS-209
Development of an Atwood aircraft practicum tool based on automatic timers to explain Newton’s second law A Malik1, N F Utami1, M F Rizaldi1, Sarah1, S Nursetia1, T Mauli1, C Rochman1 and D Mulhayatiah1 Prodi Pendidikan Fisika UIN Sunan Gunung Djati Bandung, Jl. AH. Natution No. 105 Cibiru, Bandung 40 614, Indonesia Abstract The aim of this study was to determine the feasibility of automatic time-lapse-based Atwood aircraft tools to explain Newtons second law. The method in this research is the experimental method Instrument testing is carried out at mass loads m1 of 10gr, 20gr, 30gr, by using weights m2 of 100gr at a distance 60 cm and force variations of 0,5N, 0,6 N and 1N. The results of the measurement and analysis of the data obtained acceleration in theory Newton II Law, namely each for mass variants and successive forces is 4,864m/s2, 4,102 m/s2, 3,414 m/s2, 2,069m/s2, 2,581 m/s2 and 4,102 m/s2 while the results of the acceleration calculation are based on an automatic time interval 4,220m/s2, 3,826 m/s2, 2,985m/s2, 1,697m/s2, 2,415 m/s2 and 3,826 m/s2. The smallest error data is 6,39% and the biggest error is 18%. The results of these measurements indicate the measurement is still accurate because the error percentage is less than 20%. Keywords: Atwood, automatic time-lapse, Newton law Share Link | Plain Format | Corresponding Author (Adam Malik)

1077	Physics	ABS-215
Band Gap Energy Calculation of Theaflavin and Cyanidin-3-Glucoside Molecules As Active Material In Dye Sensitized Solar Cells Using Density Functional Theory (DFT) Gina Rizqillah1, Hasniah Aliah1 and Pina Pitriana2* 1Physics Department, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung, Jl. A. H. Nasution 105, Bandung, Indonesia. 2Physics Education Program Study, Faculty of Tarbiyah and Teacher Training, UIN Sunan Gunung Djati Bandung, Jl. A. H. Nasution 105, Bandung, Indonesia. Abstract Dye-Sensitized Solar Cell (DSSC) is one of photovoltaic (PV) cell which converts solar energy into electrical energy, by using dye as its active material. In this study, total energy and bandgap energy of natural dyes such as theaflavin and cyanidin-3-glucoside (C3G) molecules were calculated using density functional theory (DFT) method via quantum espresso software. Optimization of some calculation parameters such as cutoff energy, pseudopotential and k-point have been done to ensure minimum total energy of dyes molecule. Based on the result, the total and bandgap energy of theaflavin is 10.172,80 eV and 1,96 eV, while the total and bandgap energy of the C3G molecule is 8.442,26 eV and 1,73 eV. From these results, it is necessary to further investigate the opportunities of the two dyes as DSSC sensitizers. Keywords: DSSC, electronics structure, DFT, theaflavin, cyanidin-3-glucoside Share Link | Plain Format | Corresponding Author (Pina Pitriana)

1078	Physics	ABS-216
Ab-Initio Calculation of Cubic and Tetragonal Phase of CsPbI3 Perovskite Hana Ramadhani Shanaz1, Hasniah Aliah1 and Pina Pitriana2 1Physics Department, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung, Jl. A. H. Nasution 105, Bandung, Indonesia. 2Physics Education Program Study, Faculty of Tarbiyah and Teacher Training, UIN Sunan Gunung Djati Bandung, Jl. A. H. Nasution 105, Bandung, Indonesia. Abstract A study of the electronic structure of two-phase CsPbI3 has been done through calculations using the density functional theory (DFT) method. Perovskite metal halide is used as a light-absorbing material on solar cells. This material has a high level of stability and an easy fabrication process. In this research, two crystalline phases of perovskite used are the cubic and the tetragonal phase. The electronic structure discussed includes the electronic band structure, as well as the DOS (Density of States) curve, and PDOS (Projected Density of States) curve. To find out the electronic structure, optimization of calculation parameters is performed, namely variations in lattice constants, k-points, and cut-off energy. This optimization is done to get the structure with minimum total energy so that its stability can be achieved. It is known that the bandgap energy value of the CsPbI3 cubic is 1.44eV on the electronic and DOS curve curves. Whereas the band gap energy value of tetragonal CsPbI3 is 0.6 eV. This shows that cubic phase of CsPbI3 as semiconductor material. Keywords: CsPbI3, cubic and tetragonal phase, DFT, band gap energy, DOS, PDOS Share Link | Plain Format | Corresponding Author (Pina Pitriana)

1079	Physics	ABS-217
First Principle Calculation of Lead-Free Inorganic Perovskite ASnI3 using Density Functional Theory (DFT) Pina Pitriana1, Triati Dewi Kencana Wungu2, Herman3 And Rahmat Hidayat3 1Physics Education Program Study, Faculty of Tarbiyah and Teacher Training, UIN Sunan Gunung Djati Bandung, Jl. A.H Nasution 105, Bandung 40614, Indonesia 2Nuclear Physics and Biophysics Research Division, Physics Study Program, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Jl. Ganesha 10, Bandung 40132, Indonesia 3Physics of Magnetism and Photonics Research Division, Graduate Study Program of Physics, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Jl. Ganesha 10, Bandung 40132, Indonesia Abstract Lead-based inorganic perovskite crystals currently have great potential to be used as light-absorber material in solar cells, with high energy conversion efficiency. However, the safety issue of lead (Pb) is one of the reasons for developing other materials that are more environment friendly. In this research, optimization of parameter calculation has been done to get electronic structure from ASnI3 including lattice parameter optimization, kinetic cut-off energy, k-point and pseudopotential type using density functional theory (DFT) method. From the results of electronic band structure calculation shows direct bandgap of ASnI3 with band gap energy values from 0.28 eV to 0.47 eV according to cation changes in ASnI3 (A = Li, Na, K, Rb and Cs). In addition, the calculation of projected density of states (PDOS) shows the state density in the valence band ASnI3 is dominated by halides I-5p and Sn-5d, whereas the conduction band is dominated by Sn-5d orbitals and alkali cations (A). The surface charge density of ASnI3 in the crystal plane (110) and (100) shows a strong covalent bond between Sn and I, while the alkaline cations (A) and I show ionic bonds. The number of electrons transferred by the Li cation is more than Cs, which mean Li is more ionic than Cs, it is confirmed using Bader analysis. Keywords: Perovskite, DFT, ASnI3, band gap energy, charge density, PDOS, Bader analysis Share Link | Plain Format | Corresponding Author (Pina Pitriana)

1080	Physics	ABS-729
Application of Relativistic Quantum Mechanics in Radial Problems and E/M Equations Gede Yohanes Arygunartha *, Ni Made Defi Janurianti, Yohanes Parlindungan Situmeang Faculty of Agriculture, Warmadewa University, Jl. Terompong 24, Denpasar, Bali. Indonesia. * Email: anez.ary25[at]gmail.com Abstract This research is pure research in the field of pure physics. The subject of this research is to use the e / m measurement tool. This study aims to study the effect of the magnitude of the electron velocity and the magnitude of the magnetic field on the electron trajectory and determine the e / m ratio in calculations. The results showed that the magnitude of the electron path radius is directly proportional to the magnitude of the electron velocity and inversely proportional to the magnitude of the magnetic field acting on it. Likewise the calculation result for fixed current is 16.84% and the fixed voltage is 14.15%. Meanwhile, the size of the electron path is directly proportional to the magnitude of the speed of the electron path, and inversely proportional to the magnitude of the magnetic field acting on the electron. Keywords: Measurement of e/m, Relativistic Quantum and Radial Share Link | Plain Format | Corresponding Author (Gede Yohanes Arygunartha)

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