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271	ABS-170	Physics
Analysis of Biomass Briquettes Based on Carbonized Rice Husk And Jatropha Seed Waste by Using Waste Newspaper Pulp as an Adhesive Material Sri Suryaningsih (a*), Resi Resitasari (a), Otong Nurhilal (a) (a) Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jalan Raya Bandung Sumedang Km. 21, Jatinangor 45363, Indonesia * sri[at]phys.unpad.ac.id Abstract Biomass waste that has not been utilized properly is rice husk and jatropha seed waste, and there is a future need for efficient utilization of these wastes. Rice husk is the outermost part of the rice seed, the rice milling process produced 20% - 30% of the waste as rice husks. Jatropha seed waste is a de-oiled part of jatropha seed after the oil extraction process for biodiesel production, and produced 70% of waste. As biomass, both materials are potential sources of carbon that can be utilized as an alternative energy sources such as bio-briquettes. The method used in this research is experimental method including drying of the biomass material sample, carbonization process, refine and filtration using 40 mesh sieve (420 μm). The composition of the selected charcoal mixture is fixed at 50:50, and the addition of the waste newspaper pulp as and adhesive material with variations of 8% and 12% by weight. Characterization is done by using proximate test, calorific value test and compressive strength test. After going through pressure printing and drying process, the briquettes with 8% addition of waste newspaper pulp adhesives have the best value of compressive load test results and has the highest heat energy content, equal to 5.650 cal / g. Keywords: Adhesive; Briquette; Carbonization; Caloric energy; Jatropha seed, rice husk PermaLink | Plain Format | Corresponding Author (Sri Suryaningsih)

272	ABS-180	Physics
The Effect of Uniaxial Pressure on Development on 3D Fracture and Its Properties of Clay Cap Rock on One Potential Geothermal Area in Candi Umbul-Telomoyo, Semarang, Central Java, Indonesia Sumarni (a*), Selly Feranie (a), N D Ardi (a), F D E Latief (b) a) Digital Rock Physics and Soil Mechanical Laboratory, Departement of Physics Education, Faculty of Education Mathematics and Natural Sciences Indonesian University of Education Jalan Setiabudhi no. 229, Bandung 40154, Indonesia *sumarnis093[at]gmail.com b) Physics of Earth and Complex System, Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Jalan Ganesha no. 10, Bandung 40132, Indonesia Abstract The geothermal potential of Candi Umbul-Telomoyo is very interesting to be observed due to the emergence of geothermal manifestations. A sample of clay cap rock on geothermal area in Candi Umbul-Telomoyo, Semarang has been digitized to the observe 3D fracture development due to the influence of uniaxial pressure. The 3D fracture were analyzed using digital image processing and analysis method. The sample is an altered ceses andesite breccia with diameter of 4.4 cm and height of 4.3 cm. The rock sample was collected from well at 590 m. Rock sample was given uniaxial pressure treatment of 59 bar, 75 bar, 91 bar, 107 bar, 123 bar and 156 bar. The results show that 3D fracture develops as pressure increase are total orientation {\(\theta\) (P)}, aperture {e (P), fracture density {\(\Phi\) (P)}, fracture intensity {I (P)} and fractal dimension {D (P)}. Total orientation and fracture intensity have polynomial to relative to the given pressure. Aperture and fractal dimension are linearly proportional to the give pressure, while the fracture density is exponentially proportional to the give pressure. The effect of increasing pressure to the safety of this geothermal clay cap was studied by conducting a continuous uniaxial compressive test on the sample. From this test, it is observed that the sample broken at the pressure of 478 bar. The results of this study are expected to provide an overview of the characteristics of the clay cap rock and the clay cap stability on Geothermal Area Candi-Umbul Telomoyo. Keywords: fracture characteristics, uniaxial pressure, clay cap PermaLink | Plain Format | Corresponding Author (Sumarni Sumarni)

273	ABS-186	Physics
Monitoring of Rainfall Infiltration to Under Surface Using DC Resistivity Method Nanang Dwi Ardi (a), Mimin Iryanti (a), Eleonora Agustine (b), Cahyo Puji Asmoro (a), Ahmad Yusuf , Anggia Nur Abiyyah Sundana, Hani Yusrina Safura, Mardiannisa Fitri, Meliza Anggraeni, Rizky Kurniawan, Rossy Afrianti, Sumarni a) Physics Program, Universitas Pendidikan Indonesia b) Geophysics Program, Universitas Padjajaran Abstract The use of non-agricultural land in Universitas Pendidikan Indonesia causes the land absorption to be smaller than the use of soil for agriculture so that it can lead to surface runoff. This study discusses how to monitor rainwater infiltration to subsurface using resistivity method with Wenners configuration. Data retrieval takes place twice with a span of two months and is in the same place. The first taking was conducted on Saturday, October 14, 2017 at coordinates 6 51 38.46 S and 107 35 21.05 E with data obtained in the form of three trajectories. The second data retrieval takes place on Tuesday, December 12, 2017 for track 1, on Saturday 16 December 2017 for track 2 and Sunday of December 17, 2017 for the 3rd track. The second data collection is not held in one day due to weather conditions at that time it was raining. The results show that the comparison of visualization results of one and two data retrieval looks quite contrasting. In the first data-visualization drawing, it is clear that rainfall infiltration does not spread evenly. While on the second data retrieval, rain water infiltration spread evenly with rock layers whose volume is getting thinner. This is due to the infiltration process due to the high rainfall intensity at the time before the second data collection. In the model is also seen when the layer of purple rocks have decreased in volume from the first data retrieval on the second data retrieval. While the rain water infiltration layer more evenly. Monthly weather reference data showed that temperature and evapo-transpiration relationships over the months showed that temperature and evapo-transpiration results from September to December were relatively stable with average temperatures of four months being 22.38 0C and evapo-transpiration was 5.02 cm / month. Therefore, the evaporation caused by all water, soil, vegetation and the earths surface located at Universitas Pendidikan Indonesia is 5.02 cm / month. Monitoring of rainfall infiltration within two months from the first measurement having rainfall infiltration of 3.9 mm / h indicates that infiltration rate is very fast and the magnitude of evapotranspiration is 5.02 cm / month. Keywords: resistivity, infiltration, rainfall, soil PermaLink | Plain Format | Corresponding Author (Nanang Dwi Ardi)

274	ABS-201	Physics
Characterization of Turbidity Water Sensor SEN0189 on The Changes of Total Suspended Solids in The Water Wahyu Luqmanul Hakim*, Lilik Hasanah, Ahmad Aminudin Physics Study Program, Physics Education Department, Faculty Of Mathematics Education And Natural Sciences, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No.229, Bandung *wahyugandring[at]student.upi.edu Abstract 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 <60 micrometer 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. Keywords: Sensor, Turbidity of water, Total Suspended Solids. PermaLink | Plain Format | Corresponding Author (Wahyu Luqmanul Hakim)

275	ABS-203	Physics
THE CHARACTERIZATION OF GIANT MAGNETORESISTANCE SENSOR FOR BRIDGE DEFLECTION MEASUREMENT Ahmad Aminudin, Rahayu Dwi Harnum, Mimin Iryanti Departemen Fisika, Universitas Pendidikan Indonesia Jl. Dr. Setiabudi No.229 Bandung, Indonesia Abstract Displacement measurement is the displacement of objects from the initial state to the final state. Displacement can be done on landslides, building construction, or bridges. One of the sensors used to detect displacement is the GMR sensor. The GMR sensor is a sensor that can detect changes in magnetic fields. The configuratioan of permanent magnet and GMR sensors can be used to detect micro-order displacement. The research method is done by placing permanent magnets on the static and GMR sensors on the moveble part of the bridge. The test results show that the GMR sensor can detect 10micro order. The GMR sensor voltage response to the shift distance is obtained exponentially. Maximum shift test is obtained at half the span of the bridge. This research can be used for monitoring bridge shift. Keywords: micro order displacement, GMR sensor, voltage response, measurement PermaLink | Plain Format | Corresponding Author (Ahmad Aminudin)

276	ABS-208	Physics
ELECTRICAL PROPERTIES ON PLANTATION FIRES IN LIANG ANGGANG VILLAGE, SOUTH KALIMANTAN, INDONESIA Mimin Iryanti, Ahmad Aminuddin, Eleonora Agustine and Yuyu Rahmat Tayubi Physics Department, Universitas Pendidikan Indonesia Jln Setiabudhi No 229 Bandung Geophysics Department, Universitas Padjadjaran Jln Raya Bandung Sumedang KM 21, Kab Sumedang Abstract Electrical properties have been used in soil characteristic such as conductivity electric, resistivity and dielectric permittivity. The aim of this study is characterization of electrical properties at planation fires at Liang Anggang village, Kab Banjar in South Kalimantan, Indonesia. The geoelectric resistivity WennerSchlumberger method was conducted in field with 1 meter electrode spacing. The result of resistivity section whose length is 52 meter varies from 149 to 1436 ohmmeter. There relatively high resistivity (1039 until 1436 ohmmeter) at near surface until 5 meter below surface, and deeper than 5 m has lower resistivity (149 until 752 ohmmeter). Resistivity of plantation fires has high resistivity, because there are many organic matters and less water content and that impact up to 5 meter the depth. Keywords: Resistivity, Plantation Fires, Organic Matter, GeoElectric, Indonesia PermaLink | Plain Format | Corresponding Author (Mimin Iryanti)

277	ABS-214	Physics
THE NEW HILAL VISIBILITY CRITERION FOR TROPICAL REGION JUDHISTIRA ARIA UTAMA (a*), FERRY MUKHARRADI SIMATUPANG (b) a) DEPARTMENT OF PHYSICS EDUCATION, FPMIPA, UNIVERSITAS PENDIDIKAN INDONESIA Jl. Dr. Setiabudhi 229 Bandung, Jawa Barat, Indonesia, 40154 *j.aria.utama[at]upi.edu b) Astronomy Research Division, FMIIPA, Institut Teknologi Bandung Jl. Ganesha 10 Bandung, Jawa Barat, Indonesia, 40132 Abstract This paper proposes a new hilal (lunar crescent formed immediately after conjunction) visibility criterion that applies to tropical region utilizing modified mathematical model of near-sun objects visibility. Moon-sun altitude difference (ARCV) and elongation (ARCL) at first observable moment have been chosen as parameters and used in developing new visibility criterion. The data indicate that the minimum ARCV and ARCL value for naked eye observation are 4 degrees and 8.4 degrees, respectively. Keywords: Hilal, visibility criterion PermaLink | Plain Format | Corresponding Author (Judhistira Aria Utama)

278	ABS-217	Physics
investigation on fractal characteristics and its relation with 3D fracture parameters on 3D fracture models Selly Feranie*, Sumarni*, F.D.E Latief** * Physics Department, UPI ** Physics Complex System, Physics Department ITB Abstract 3D fracture models have been generated to be investigated its fractal characteristic and fracture parameters using image analysis. The 3d Fractal dimension is calculated using box counting. Tthe fracture parameter such as Fracture aperture calculated using Trabecular separation parameter and Fracture Intensity calculated using skletonize the fracture and 3D fractal dimension calculated using box counting method.We generated Five 3D fracture models with the same density but different aperture and intensity and calculate its fractal dimension. We found that theres a positive correlation between 3D fractal dimension with all 3d fracture parameters e.g., aperture and intensity Keywords: fractal characteristics on 3D Fracture model PermaLink | Plain Format | Corresponding Author (selly feranie)

279	ABS-223	Physics
COMPARISON OF TUNNELING CURRENTS IN GRAPHENE NANORIBBON TUNNEL FIELD EFFECT TRANSISTORS CALCULATED USING DIRAC LIKE EQUATION AND SCHRODINGER EQUATION Endi Suhendi, Lilik Hasanah, Dadi Rusdiana, Fatimah A. Noor, Neny Kurniasih, Khairurrijal Universitas Pendidikan Indonesia, Institut Teknologi Bandung Abstract The tunneling current in graphene nanoribbon tunnel field effect transistor (GNR-TFET) has been quantum mechanically modeled. We compared the tunneling current in the GNR-TFET based on calculations using the Dirac like equation and the Schrodinger equation. The transfer matrix method (TMM), which is a numerical approach, was used to calculate electron transmittance and the tunneling current computed by using the Landauer formula. It was found that the tunneling currents calculated using both equations have similar characteristics for the same parameters, even though it has different value. The tunneling currents calculated by using the Dirac like equation are lower than those obtained under Schrodinger equation. Keywords: Tunneling current, graphene nanoribbon, tunnel field effect transistor, Schrodinger equation, Dirac like equation PermaLink | Plain Format | Corresponding Author (Endi Suhendi)

280	ABS-227	Physics
Simulation of Topology Performance of Wireless Sensor Network Based Multi-hop Routing Lilik Hasanah, Heru Yuwono, Ahmad Aminudin dan Budi Mulyanti Departmen Pendidikan Fisika, FPMIPA, Universitas Pendidikan Indonesia, Jl. Setiabudi No. 229, Bandung 40154 Indonesia Departmen Pendidikan Teknik Elektro, FPTK, Universitas Pendidikan Indonesia, Jl. Setiabudi No. 229, Bandung 40154 Indonesia Abstract Here is a simulation to find out the performance of WSN network with different topology and size using Multi-hop routing, and its energy usage. The WSN network in simulations is made with Arduino-based hardware with a compatible radio transmitter module. The simulation is done in MATLAB software environment. In the simulation used two network topologies, namely Random topology and Grid and network size ranging from 9 nodes up to 256 sensor nodes. From the simulation it is found that Grid topology has better performance especially on the number of small nodes, while Random topology has more stable performance and better than Grid topology at large number of nodes. The life time of the WSN network is not affected by the number of sensor nodes in the network, but by the amount of energy available on each sensor node. Keywords: Toology performance, wireless sensor network, multi-hop routing PermaLink | Plain Format | Corresponding Author (Lilik Hasanah)

281	ABS-233	Physics
Instrumentation & control system for SAMOP reactor experimental facility Syarip(1), Rosyid M(1), Dewita(1), Abimanyu A(2) (1) Centre for Accelerator Science & Technology, National Nuclear Energy Agency, JL. Babarsari, POB 6101 ykbb, Yogyakarta (2) Polytechnic Institute of Nuclear Technology, Yogyakarta. Email: syarip[at]batan.go.id Abstract The instrumentation and control system (ICS) for a subcritical nuclear reactor experimental facility for producing Mo-99 radioisotope is presented in this paper. The system is designed based on the defense-in-depth concept. A sub-critical reactor experimental facility for Mo-99 production (SAMOP) has been designed and being constructed at the Centre for Accelerator Science and Technology (CAST), Nuclear Energy Agency (BATAN). The reactor subcritical facility is fuelled by uranyl nitrate and driven by an external neutron source from the radial beam-port of Kartini reactor. The SAMOP-ICS was designed using 2 neutron detectors of fission chamber and compensated ionization chamber types and provided with a safety rod made from boron-aluminum (boral) used for shutting-down the reactor in emergency condition. The method used for reactor protection system is based on hardwired with a fail-safe principle. The safety rod drive mechanism is designed by using rack and pinion, and provided by the safety button of key release and electromagnetic holder status. Keywords: instrumentation system, nuclear, reactor, subcritical, Mo-99, uranyl nitrate PermaLink | Plain Format | Corresponding Author (Syarip Syarip)

282	ABS-2	Physics Education
The Characteristics of Development Teachers Pedagogy Competencies of Electromagnetics Test L Hakim(a*), P Sinaga(b), A Setiawan(c) a) Prodi Pendidikan Fisika, Universitas PGRI Palembang, b) Department Pendidikan Fisika UPI Bandung c) Department Teknik Mesin UPI Bandung Abstract The aim of this research was to evaluate the faces of the pedagogy competencies test and quantity mistakes rendering to classical test theory and item response theory. The test was constructed on the fundamental concepts and essential content of the electromagnetics, with an orientation to the pedagogy competencies physics teacher. The pedagogy competencies designate is the competencies integrated into teaching and learning electromagnetic. The research method is a mixed-method with embedded experimental models. The analysis was based on 40 answers of pre-service who have taken training teaching in school (PPL) courses at the Physics Education Department. Based on classical test theory indicates that 15 test items were analyzed, 12 items were good quality with reliability index is 0.74. As of information function and standard error measurement of item response theory, the conclusion of this evaluation is that the model 3PL is better to use when evaluating the test. Keywords: pedagogy competencies;item response theory;electromagnetic PermaLink | Plain Format | Corresponding Author (Lukman Hakim)

283	ABS-263	Physics Education
Stakeholder view of competency profiles (pedagogical, professional, social and personality) graduate of the physics education Y Dirgantara1, A. Malik1, A Samsudin2, E K Yuningsih1, M M Chusni1, R D Agustina1, M N Fairuzillah3 1Program Studi Pendidikan Fisika Jurusan Pendidikan MIPA, Fakultas Tarbiyah dan Keguruan UIN Sunan Gunung Djati, Jl. A. H. Nasution No 105, Bandung, Indonesia 2Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia 3Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia Abstract Departing from the increasingly fierce world of work, every study program at various universities needs to prepare graduates that are able to compete for the global world. This study aims to determine the level of competence of undergraduate graduates of physics education program UIN Sunan Gunung Djati Bandung, especially pedagogic, professional, social and personality competencies as well as efforts to improve the weakness of prospective teachers in welcoming the world of work. The method used is survey. The subjects of this study are graduates of physics education program. The instrument used is a questionnaire filled by the supervisor of graduate users. Analysis of data obtained based on a percentage of answers to respondents, then qualified as the good category, good, enough and less. The result of the research shows that physics education physics graduate of UIN Sunan Gunung Djati Bandung pedagogic competence has a good qualification (69%), professional competence has a good qualification (68%), social competence has a good qualification (67%) and well-qualified personality competence (71%). Thus, in general, the competence of physics education program graduates UIN Sunan Gunung Djati Bandung is good and acceptable by stakeholders. Keywords: competency profiles, physics education PermaLink | Plain Format | Corresponding Author (Yudi Dirgantara)

284	ABS-8	Physics Education
Computer simulation-assisted conceptual change text (CS-CCT): a preliminary study on fluid dynamics Galih Dwi Putra , Achmad Samsudin. Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Bandung, Indonesia Abstract Previously, the development CCT has been conducting since previous decade until currently age. However, the latest version of CCT immobile has several weaknesses in such aspects as: the visualization of abstract concept and it has seldom been assisted by computer simulation. This research aims to develop Computer Simulation-Assisted Conceptual Change Text (CS-CCT) by way of a continuation of the previous research combined with computer simulation. A Formative Development Method (FODEM) has been utilised to obtain a valid and comprehensive collecting-data. A FODEM consist of three components that are: (1) needs analysis, (2) implementation and (3) formative evaluation. Participants were occupied from 35 students (17 years old in average) who studied in one of Senior High School located in Bandung city. The result shows that CS-CCT is able to be designed and developed in term of facilitating students to change their conceptions. Thus, it could be concluded that the development of CS-CCT are able to facilitate students conceptual change on fluid dynamics conceptions. Keywords: Computer simulation-assissted conceptual change text, fluid dynamic, Conceptual Change, FODEM . PermaLink | Plain Format | Corresponding Author (Galih Dwi Putra)

285	ABS-267	Physics Education
Profile of Multiple Representation Skills of Senior High School Students in Bandung on Linear Motion Bayti Rahmadewi (a*), Andhy Setiawan (b), Parsaoran Siahaan (c) a) Departement of Physics Education, School of Postgraduate, Indonesia University of Education, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia *baytirahmadewi[at]upi.edu b) Pyhsics Program, Faculty of Mathematics and Science, Indonesia University of Education, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia c) Sains Education Program, School of Postgraduate, Indonesia University of Education Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia Abstract The purpose of this study is to determine the profile of student translating among modes of representation skill on physics. The ability to represent information on physics problem into verbal, graphical and mathematical representations in order to help students define suited physics concepts on solving physics problems. Participants included 28 11st grade students in a Senior High School located in Bandung. The sampling technique is random sampling. This study used description method to describe the profile of student translating among modes of representation skill. The findings showed that student translating information among modes of representation skills were classified as low category with 54.44% of mastery. The highest average score on student ability to represent pictorial information into mathematical format was 69.60% from its ideal maximum score. Whilst students ability to represent pictorial format into graphical reached 25%. The use of Problem Based Learning worksheet with multiple representations approach is recommended to increase student multiple representation skills. Keywords: Multirepresentation; Verbal; Graphic; Mathematical; Linear Motion PermaLink | Plain Format | Corresponding Author (Bayti Rahmadewi)

286	ABS-268	Physics Education
Developing of physics practical module based on scientific approach for tenth grade in senior high school I Y Putra, D Dasmo, D L Saraswati, I A D Astuti, N Nurullaeli, Y B Bhakti, and I B Rangka Universitas Indraprasta PGRI, Jakarta, Indonesia Abstract This research tries to develop and offer a module for physics teaching aid in senior high school. ADDIE model was adopted as a method to realize this learning module. The module development is especially addressed to Tenth Grade in Senior High School. The module was justified on the content, design and language aspect by the selected expert. The results of this study indicate that the average of score validity on the content is 4.41 or 88%; module design reached 3.90 or 78%; and language aspect of module is 4.01 or 81%. Assessment of the three aspects of module development demonstrates that the developed modules settle into good category. Then, it can be confirmed that the Physical Practice Module Based on Scientific Methods for Tenth Grade in Senior High School was satisfactory. We are delighted about the findings of this research that strengthens us to draw up of field investigations on students. Keywords: Physics Module, Practical Learning, ADDIE Model, Validation Stage PermaLink | Plain Format | Corresponding Author (Itsar Bolo Rangka)

287	ABS-14	Physics Education
The Analysis of Critical Thinking Skills Test in Social-Problems for Physics Education Students with RASCH Model Lucky Nindi Riandika Marfui (a*), Ilfiandra (b), Nurhudaya (b) a) Guidance and Counseling Program, Universitas Pendidikan Indonesia Jalan Setiabudhi no 229, Bandung 40154, Indonesia *riandika.luckybk[at]student.upi.edu b) Guidance and Counseling Program, Universitas Pendidikan Indonesia Jalan Setiabudhi no 229, Bandung 40154, Indonesia Abstract Individuals who explore scientific science, are required to be critical of some social issues rather than in the scientific only. Critical thinking skills construct was developed based on Faciones theory in Delphi Reports in 1999, which mentions critical thinking components including interpretation, analysis, evaluation, inference, explanation, and self-regulation skills. This study aims to identify the level of critical thinking skills of Physics Education students in the youth category at Universitas Pendidikan Indonesia. The subjects are 44 students with age ranges from 18 to 21 years old. The results of this study indicate the level of critical thinking skills of physics education program students in the low category with a percentage of 39%. This test when tested to physics education students has a reliability coefficient of 0.64, with the most difficult item number is the number 5 and easiest number 21 from RASCH Model analysis results. Physics students tend to have low analytical skills and inference ability in critical thinking, while the ability of evaluation and self-regulation are high for addressing a problem. Keywords: Critical Thinking Skills Test, Physics Education Students, Facione Theory, RASCH Model PermaLink | Plain Format | Corresponding Author (Lucky Nindi Riandika Marfui)

288	ABS-15	Physics Education
Unveiling students misconceptions through computer simulation based PDEODE learning strategy on dynamic electricity A Samsudin1*, Azura1, I Kaniawati1, A Suhandi1, N J Fratiwi1, Supriyatman2, F C Wibowo3, A Malik4 and B Costu5 1 Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Bandung, Indonesia 2 Program Studi Pendidikan Fisika, Universitas Tadulako, Palu, Indonesia 3 Jurusan Pendidikan Fisika, Universitas Sultan Ageng Tirtayasa, Serang, Indonesia 4 Program Studi Pendidikan Fisika, Universitas Islam Negeri Sunan Gunung Djati, Bandung, Indonesia 5 Department of Science Education, Yildiz Technical University, Istanbul, Turkey Abstract Several misconceptions occur in the students conceptions especially in the dynamic electricity concept. Misconceptions is a students understanding which are unappropriate with the scientific conceptions. Furthermore, if the students misconceptions have not been unveiled, they could be a problem in the next learning process. As a consequence, misconceptions are important faced to be changed so that students hold true conceptual understanding. In term of unveiling students misconceptions, we highly need the learning process which is able to make students could understand the concept themselves. Researchers have been utilised computer simulation based PDEODE (Predict, Discuss, Explain, Observe, Discuss and Explain) learning strategy. The purpose of the research is to unveil students misconceptions through computer simulation-based PDEODE learning strategy on dynamic electricity. This research has been implemented using quasi experiment with pretest and posttest group design. The sample who are involved in this research are consisted of 27 high school students in the one of Bandung Barat regency and they are taken by purposive sampling technique. The research result state that the frequency of students misconceptions decreases 0.21 in the low category. It can be concluded that the computer simulation based PDEODE is able to unveil students misconceptions on dynamic electricity. Keywords: misconception; PDEODE; dynamic electricity PermaLink | Plain Format | Corresponding Author (Achmad Samsudin)

289	ABS-275	Physics Education
Identification of Multiple Representation of Newton Law Concept of Physics Teacher M Masrifah1,2, A Setiawan1,3, P Sinaga1,4 and W Setiawan1,5 1Sekolah Pasca Sarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia. 2Program Studi Pendidikan Fisika, Universitas Khairun Ternate, Jl. Bandara Baabullah, Kota Ternate 97728, Indonesia. 3Departemen Pendidikan Teknik Mesin, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 207, Bandung 40154, Indonesia. 4Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia. 5Program studi Pendidikan Ilmu Komputer, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia. Abstract The ability of teachers to represent a concept using different types of representation is a very important competency. Teachers with limited representation skills will not be able to provide a holistic and appropriate learning experience because students have different skills in constructing their knowledge. The aim of this research is to know the multiple representation ability of physics teacher by using multiple representation tests on Newtons law topic. Subjects in this study were 30 high school physics teachers in North Maluku which were determined based on purposive sampling technique. Multiple representation data were analyzed using descriptive statistics. The result shows that in general the multiple representation ability of teachers is in the medium category (51%). While in general of each form of representation are the texts representation is in the high category (76%), image representation is in the medium category (59%), pictorial diagrams representation is in low category (20%), table representation is in the low (38%), graphic representation is in the low category (25%), and the mathematical representation is in the high category (85%). The results shows that teachers still have difficulty in representing the concept in the form of pictorial diagrams, tables and graphs because they only teach Newtons 2nd law using text, image and mathematical representation. Keywords: multiple representation PermaLink | Plain Format | Corresponding Author (Masrifah Masrifah)

290	ABS-28	Physics Education
An analysis of students mental models using temperature and heat transfer-diagnostic test (THT-DT) R Dewi* and A Samsudin Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Bandung, Indonesia Abstract Students mental models can be identified through a students concept understanding. In one study found that one of the students difficulties in learning physics is to understand the concepts of physics, so it can be identified that students have a low mental models. The purpose of this study was to analyse students mental models based on the level of understanding by using diagnostic tests. The instrument has been developed in the form of four tier test to analyse mental models in temperature and heat concept. A four tier test is a test of multiple choice with reason of semi closed answer with confidence rating. The results obtained from the test, classified according to the category of mental models of students. This research used descriptive quantitative method. The subject of the study was 30 eleventh grade students (average age 16 years) in Senior High School in Bandung and has been studying the material temperature and heat transfer. Research results show that 4 students in scientific model level, 8 students in synthetic level, and 18 students in initial model level. In conclusion, the development of THT-DT four-tier test-items is one of potential diagnostic test instrument that able to analyse the level of students mental models. Keywords: mental models; temperature and heat transfer; diagnostic test PermaLink | Plain Format | Corresponding Author (Regiana Dewi)

291	ABS-29	Physics Education
Development of four-tier diagnostic test (FTDT) to identify students mental models on static fluid F Kafiyani* and A Samsudin Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Bandung, Indonesia Abstract Four-Tier diagnostic test on some previous studies are usually used to diagnose misconceptions and conceptual change. In this study, the four-tier diagnostic test (FTDT) has been used to identify students mental models on static fluid. Based on the mastery of students concept on static fluid, mental models will have classified into three categories: 1) initial model, 2) synthetic model and 3) scientific model. The research method utilized is the Dick and Crey model, which has four steps: 1) development of analysis diagnostic test, 2) diagnostic test design, 3) implementation and 4) evaluation. The instrument has been collected to 40 students at senior high school in Bandung. Result study shows that students mental models, which are Initial model (42.5%), synthetic model (37.5%) and scientific model (20%). It can be concluded that four-tier diagnostic test (FDTD) is able to identify students mental models in static fluid. Keywords: four-tier diagnostic test (FTDT), mental models, static fluid PermaLink | Plain Format | Corresponding Author (Fitri Kafiyani)

292	ABS-285	Physics Education
Investigating physics laboratory-based higher order thinking skills (HOTs) in Indonesian high schools A Ismail1,2,*, A Setiawan1 , A Suhandi1,, And A Rusli3 1Science education program, Prosgraduate School, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No 229, Bandung 40154, Indonesia 2Department of physics education, Institut Pendidikan Indonesia, Jl. Pahlawan No.32, Garut 44151, Indonesia 3Department of physics, Faculty of science and information technology, Catholic Parahyangan University , Bandung 40141 Indonesia Abstract The existing physics laboratory is a pivotal part of teaching and learning physics. Several skills required by students can be facilitated by physics laboratory such as HOTs. However, the conventional laboratory that leads to verification laboratory was not successful training students dealing with HOTs. This present study investigates the implementation of physics laboratory based HOTs in Indonesian high schools. A comparative case study was conducted to take several data from participants. The participants of this present study are 12 physics teachers and 32 students in Indonesian high schools. A Questionnaire and critical thinking (CT) test are used to garner the data. The finding result reveals that there four main obstacles to train and develop laboratory activities-based HOTs: the limitation of time to conduct laboratory activities, the limitation of lab space, the low ability of physics teachers in designing laboratory activities-based HOTs, and low knowledge of students dealing with concepts and laws of physics. These obstacles also support another result which depicts the low achievement of students CT skills. A consideration of this result present study opens deep insight and wider context in a new form of laboratory activities in Indonesia that is augmented reality laboratory. Keywords: Physics laboratory-Based HOTs, HOTs. PermaLink | Plain Format | Corresponding Author (Ali Ismail)

293	ABS-31	Physics Education
Improving students conceptual knowledge on optical device materials with computer simulations S Rahmadani, A Samsudin, A Danawan, I Kaniawati, E Suhendi Universitas Pendidikan Indonesia Abstract One of the factors causing the low level of students conceptual knowledge on optical device materials is the difficulty of students to observe the shadow formation process so that one can see an object. Students can not understand the function and way of working the parts of the eye. Therefore, it is necessary to develop computer-based instructional learning media on optical device materials. The development of learning media using development method with the sample of research as many as 30 high school students. The instruments utilized to determine the increase of students conceptual knowledge were pretest and posttest in the form of multiple choices. After using computer simulations in physics learning, students conceptual knowledge of optical device material has increased as indicated by the normalized gain <g> with the medium category. Keywords: Computer Simulation, Conceptual Knowledge, Optic Devices PermaLink | Plain Format | Corresponding Author (Sri Rahmadani)

294	ABS-32	Physics Education
VARK learning style: a quasi experiment research on impulse and momentum I Sintia, H Rusnayati, and A Samsudin Program Studi Pendidikan Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No.229 Bandung 40154, Indonesia Abstract Each person have different preference in learning and processing information which describe by learning style. The VARK Learning styles divide learning style into visual, aural, reading/writing, and kinesthetic. Most of learning process in class only providing aural and visual learner, teacher need to broaden their teaching style so that they may reach a great number of their student. This research aim to identify students learning style and compare physics learning result between visual learner and aural learner in impulse momentum material. Research was designed according to quasi experiment design with 50 senior high school students as participants. The VARK Questionnaire has been utilized to identify students learning styles. The result shows 18% of the students are visual, 20% Aural, 18% Reading, 24% kinesthetic, and 20% multimodes. In addition we compare learning result between visual and aural learner and it show that visual learners better than aural learners which is shown by N-gain value. <g> = 0,65 for visual learner, <g>=0,59 for aural learner. In conclusion, knowing student learning style is beneficial for teacher to broaden their teaching style so its best suited to all students. Keywords: Learning Style; VARK; Impulse Momentum; Visual, Aural; PermaLink | Plain Format | Corresponding Author (Inha Sintia)

295	ABS-33	Physics Education
Collaboration skills based multimedia-based integrated instruction: a development study on refraction concept Y C Setiawan, A Samsudin, E Suhendi, H Novia, I Kaniawati, D T Chandra, P Siahaan Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Bandung, Indonesia Abstract Development of physics interactive multimedia is still rarely found, especially regarding to collaboration skills enhancement. This study is having a purpose to develop a Multimedia-Based Integrated Instruction (MBI2) that expected to enhance students collaboration skills. Researcher uses Sadiman model of development research method which consists of identifying students need, formulating instructional objective, formulating learning materials, developing evaluation instrument, producing, and revising. As a research sample, thirty five eight grader students in Bandung are being involved in this study. Result shows that mean value of students collaboration skills score is increasing from 2.7 to 3.3 (by maximum score of 4). It can be concluded that development of Multimedia-Based Integrated Instruction (MBI2) research is capable for enhancing junior high school students collaboration skills on refraction concept. Keywords: MBI2; Collaboration skills; Refraction concept; Sadiman model PermaLink | Plain Format | Corresponding Author (Yusa Chavez Setiawan)

296	ABS-35	Physics Education
Development of Computer Simulation-Assisted Conceptual Change Model (CS-CCM) to change students conception on gas kinetic theory N Azizah*, A Samsudin, D Sasmita Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia Abstract This study aims to develop computer simulation-assisted conceptual change model to change students conception on gas kinetic theory. This study has been conducted to senior high school students because gas kinetic theory is an abstract concept, so that the conceptions usually increase misunderstanding and misconceptions of students. The research development has been implemented in the ADDIE development model. The ADDIE model consist of: Analyse, Design, Develop, Implement, and Evaluate. Respondents in this study amounted to approximately 26 students (average age of 17 years old), who came from one of high school in Belitung. The results show that CS-CCM can be designed and developed to facilitate change students conception on gas kinetic theory. Thus, it can be concluded that the development of CS-CCM is able to facilitate conceptual change of students conception on gas kinetic theory. Keywords: computer simulation-assisted conceptual change model (CS-CCM); change students conception; gas kinetic theory PermaLink | Plain Format | Corresponding Author (Nurul Azizah)

297	ABS-293	Physics Education
Assessing Digital Literacy in Online Physics Instruction Syella Ayunisa Rani and Mundilarto Physics Education Department, Postgraduate School, Yogyakarta State University Jalan Colombo No. 1, Yogyakarta 55281, Indonesia syellaayunisa[at]gmail.com Abstract Despite social media is common to be used in several online and distance instructions, but how far students utilizing the media for implementing digital literacy skills is interesting to be explored. Assessment items which appropriated with the indicators are needed to assess the skills. This literature study aimed to create: 1) teacher assessment items and 2) student self-assessment items for the digital literacy skills in social media. The assessment consisted of socio-emotional, photo-visual, branching, information, and real-time thinking literacy. Thermodynamics processes were applied as the online discussion topics, involved isobaric, isothermal, and isochoric. The activity focused on strengthening positive characters such as team work and sharing. The findings highlighted: 1) teacher assessment items were developed in an observation sheet and 2) student self-assessment items were developed in a questionnaire, both items were created from the digital literacy indicators of socio-emotional, photo-visual, branching, information, and real-time thinking literacy. Further study is needed to implement the items into real activities or develop it into other relevant topics. Keywords: assessment; digital literacy; online discussion; thermodynamics PermaLink | Plain Format | Corresponding Author (Syella Ayunisa Rani)

298	ABS-38	Physics Education
IMPLEMENTATION OF BASIC TECHNOLOGY EDUCATION IN MODELING INSTRUCTION THROUGH SAINTIFIC APPROACH ASSISTANCE OF HOUSEHOLD ELECTRICAL TRAINERS TO INCREASE UNDERSTANDING CONCEPT AND SELF-EFFICACY STUDENTS AT VOCATIONAL HIGH SCHOOL IN LEARNING PHYSICS OF DYNAMIC ELECTRICITY MATTER PPD NURHILAL, P SIAHAAN , DT CHANDRA, HIKMAT UNIVERSITAS PENDIDIKAN INDONESIA Abstract This study aims to get an analysis of the implementation of basic technology education in modeling instruction through saintific approach assistance household electrical trainer to improve of concept understanding and self-efficacy of students on learning physics of electricity dynamic matter matter. The research method used in this research is pre-experiment with research design used was one-group pretest-postest. Subjects in this study were 31 students of class XI TIPTL 3 in Vocational High School at Bandung. This research uses the instrument of conceptual understanding test and self-efficacy non-tes. The results of this study indicate an increase in conceptual understanding and achievement of optimal self-efficacy. Conceptual understanding of students on dynamic electrical matter after following the modeling instruction showed an increase in the average score of N-gain of 0.68, including the medium category. Student self-efficacy in dynamic electrical matter after following basic technology education in modeling instruction through saintific approach assistance household electrical trainer learning showed an increase in average N-gain score of 0.54 including medium category. Generally, 84,42% students responded positively to the implication of basic technology education in modeling instruction through saintific approach assistance household electrical trainer. It can be concluded that the implication of basic technology education in modeling instruction through saintific approach assistance household electrical trainer assistance household electrical trainer can improve of concept understanding and self-efficacy of students on learning physics of electricity dynamic matter. Keywords: modeling instruction, basic technology education, saintific approach assistance household electrical trainer, conceptual of understanding, self-efficacy, electricity dynamic PermaLink | Plain Format | Corresponding Author (Pupung Purnama Dewi Nurhilal)

299	ABS-40	Physics Education
An investigation of scholars conceptual understanding levels on fluid dynamics via four-tier test F H Dewi* and A Samsudin Universitas Pendidikan Indonesia Bandung Abstract Scholar repeatedly have difficulties in understanding complex physics concepts, such as fluid dynamic concept. It is occured because the scholars conceptual understanding is low, thus indicating a low scholar mental model. The study aims to describe the scholars conceptual understanding levels on fluid dynamic using four-tier diagnostic test. A four tier diagnostic test is a multiple choice diagnostic test that have four tiers consist of answer tier, confidence ratings for the answer tier, and reason tier. The instrument test utilised to describe scholars conceptual understanding level regarding to the mental models. This research use a descriptive-quantitative methods. The data were analyzed using the four-tier diagnostic test rubrics that were used in related literature to analysis scholars conceptual understanding levels. The subject of this study are 40 scholar in the eleventh grade (16-17 age in average) at high school in Bandung. The results show that scholars conceptual understanding levels mostly in SU (12.5%), PU (45%), AC (37.5%), and NU (5%). It is concluded that four-tier diagnostic test is able to use for investigating conceptual understanding levels. Keywords: conceptual understanding levels, fluid dynamics , four-tier test PermaLink | Plain Format | Corresponding Author (Fanny Herliyana Dewi)

300	ABS-296	Physics Education
Developing CAI-PBL with DDD-E model on Magnetic Fields Concept Abdul Fatah Maemunnur, Didi Teguh Chandra, Achmad Samsudin Universitas Pendidikan Indonesia Abstract Technological developments are widely used in various fields including education. Computers is a product of technological development where in the world of education is used as a tool or media in learning. Today has been a lot of computer-based learning media but still focused on the delivery of material only. While the research will be developed is the making of CAI were in it integrated a model of learning to deliver the material. The purpose of this research is to develop a product of CAI through problem-based learning on magnetic field material. This research uses DDD-E (Decide, Design, Develop and Evaluate) development method. At the phase of the decision has analyzed the needs associated with the manufacture of CAI-PBL. Furthermore, based on the results of needs analysis, CAI-PBL is designed and developed by researchers. Then validated at the evaluate stage by three validators (two physicists, and one media expert). It can be concluded that the development of CAI-PBL can have the potential to solve problem-solving skills. Keywords: CAI, PBL, Magnetic Fields, DDD-E model PermaLink | Plain Format | Corresponding Author (Abdul Fatah Maemunnur)

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