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961	Physics	ABS-911
The Simulation of One-Time Pad Quantum Key Distribution Mutia Delina (a*), Bambang Heru Iswanto (a), Handjoko Permana (b), Surano Muhasyah (c) (a) Physics Department, Faculty of Mathematics and Natural Science, Universitas Negeri Jakarta Jl. Rawamangun Muka No 1, Jakarta Timur 13220, Indonesia *mutia_delina[at]unj.ac.id (b) Educational Physics Department, Faculty of Mathematics and Natural Science. Universitas Negeri Jakarta Jl. Rawamangun Muka No 1, Jakarta Timur 13220, Indonesia (c) Ministry of Foreign Affair Republic Indonesia. Jl. Taman Pejambon No 6. Jakarta Pusat, Indonesia Abstract The quantum key distribution provides a secure information exchange. The system employed a photon as the messenger. In this study one-time-pad (OTP) quantum key distribution provide a key which is use one time only. For example, in a war. Therefore, it is not possible to share the secrete key in this condition. This paper discusses the simulation of a one-time pad quantum key distribution. Keywords: simulation, quantum key, one time pad PermaLink | Plain Format | Corresponding Author (Mutia Delina)

962	Physics	ABS-153
Phase Transition in One-Dimensional Hydrogen Chain: a Dependence on Basis Orbitals, Cutoff Radius, and Doping Teguh Budi Prayitno, Riser Fahdiran Universitas Negeri Jakarta Abstract We demonstrated the dependence of the phase transition in the one-dimensional hydrogen chain on the basis orbitals, cutoff radius, and doping. For reducing the computation, we employed the so called generalized Bloch theorem, where the one hydrogen atom was used. For the nondoped case, we provided a strong dependence of the phase transition on the basis orbitals and the cutoff radius, which yields ground state either the antiferromagnetic state or the ferromagnetic state. When the doping was considered, the spiral ground state appeared between the antiferromagnetic state and the ferromagnetic state. In that case, we showed that the doping induced the spiral ground state. Keywords: Phase transition, Hydrogen chain, Spiral state PermaLink | Plain Format | Corresponding Author (Teguh Budi Prayitno)

963	Physics	ABS-154
Controlling Band Gap of Monolayer MnCl2 with LDA+U Teguh Budi Prayitno, Riser Fahdiran Universitas Negeri Jakarta Abstract We performed the noncollinear first-principles calculations to control the band gap of 1T monolayer MnCl2 using LDA+U. It was shown that the increase of band gap is proportional to the increase of the effective coulomb energy U. as long as the magnetic moments of the atoms do not reduce. The reduction of the magnetic moment leads to the so-called the low spin state, in which the magnetic moment is almost half of the magnetic moment of the high spin state. It seems that the MnCl2 can be a candidate for the spintronics application. Keywords: Band gap, MnCl2, Effective Coulomb energy PermaLink | Plain Format | Corresponding Author (Teguh Budi Prayitno)

964	Physics	ABS-922
Microstructural and electrical properties of human blood Erfan Handoko1, Riser Fahdiran1, Sitti Ahmiatri Saptari2, Azzahra Humairrah3, Setia Budi4 and Rini Puspitaningrum5 1.Dept of Physics. Universitas Negeri Jakarta. Jalan Rawamangun Muka 13220. Jakarta Indonesia 2.Dept. of Physics. Universitas Islam Negeri Syarif Hidayatullah. Jakarta, Indonesia 3.Dept. of Human Medizin, University of JLU Giessen, Germany 5.Dept. of Chemistry. Universitas Negeri Jakarta. Jalan Rawamangun Muka 13220. Jakarta Indonesia 4.Dept. of Biology. Universitas Negeri Jakarta. Jalan Rawamangun Muka 13220. Jakarta Indonesia Abstract Structure, and electrical properties of human bloods are studied. The system exhibits a random structure. The X-ray powder diffraction data shows that nano sized human blood has beed formed. Scanning electron microscope analysis exhibits fine structure of human blood. Electrical data of current–voltage characteristics of human blood were measured and analyzed at room temperature. Keywords: Human blood, nano sized, fine structure , current–voltage PermaLink | Plain Format | Corresponding Author (Erfan Handoko)

965	Physics	ABS-155
Implications of Higher Order Tensor in Einstein Field Equations on Vacuum Conditions Teguh Budi Prayitno, Riser Fahdiran Universitas Negeri Jakarta Abstract We investigated the implications when introducing the higher order tensor in the Einstein field equations for the Schwarzschild metric on the vacuum condition and non de Sitter. Since the components of this tensor contain the fourth-order derivative, the solution of the Einstein field equations was solved by the Frobenius method. To see the implications, we tested two cases, i.e., the deviation of light and the time delay of light. We found that the deviation of light has no correction while the time delay of light needs correction. Keywords: Higher order tensor, Schwarzschild metric PermaLink | Plain Format | Corresponding Author (Teguh Budi Prayitno)

966	Physics	ABS-156
Energy of the Static Solitary Wave Solutions of the One-Dimensional Gross-Pitaevskii Equation Teguh Budi Prayitno, Esmar Budi, Riser Fahdiran Universitas Negeri Jakarta Abstract We have calculated the energy of static solitary wave solutions of the one-dimensional Gross-Pitaevskii equation with time-dependent parabolic trap, time dependent scattering wave length of s-wave, and time-dependent external potential describing gain or loss term. Some written solutions of the equation were proposed by Atre et al. [Phys. Rev. E 73 (2006) 056611] which two of them based on the experimental results presented by Strecker et al. [Nature (London) 417 (2002) 150]. The solutions satisfy the condition of solitary wave solution since they are localized over all space. By this argument, the energies are obtained by integrating the Hamiltonian density over all space formulated in the Classical Field Theory. To calculate the energies, we construct the appropriate Lagrangian density representing the equation by initially writing the ansatz Lagrangian density and substituting into Euler-Lagrange equation. We find that two of them have the same energies and the other one should be mathematically have the pure imaginary function describing gain-loss term in order to keep energy real. Keywords: Solitary waves, Bose-Einstein Condensation, Gross-Pitaevskii PermaLink | Plain Format | Corresponding Author (Teguh Budi Prayitno)

967	Physics	ABS-924
Complex permittivity, complex permeability and microwave absorption properties of human blood Erfan Handoko1, Riser Fahdiran1, Sitti Ahmiatri Saptari2, Azzahra Humairrah3, Mudrik Alaydrus4 and Rini Puspitaningrum5 1.Dept of Physics. Universitas Negeri Jakarta. Jalan Rawamangun Muka 13220. Jakarta Indonesia 2.Dept. of Physics. Universitas Islam Negeri Syarif Hidayatullah. Jakarta, Indonesia 3.Dept. of Human Medizin, University of JLU Giessen, Germany 4.Dept.of Electrical Engineering. Universitas Mercu Buana. Jalan Meruya Selatan No.1 Jakarta. Indonesia 5.Dept. of Biology. Universitas Negeri Jakarta. Jalan Rawamangun Muka 13220. Jakarta Indonesi Abstract This paper reports a method for measuring for the complex permittivity, permeability and microwave absorption properties of human blood. The measurement using a waveguide in the microwave band. In order to measure the S-parameter of hexagonal ferrite, a sampIe should completely fill in the waveguide end and the sampIe holder. The complex permittivity and permeability of human blood are measured using the vector network analyzer (VNA) in the frequency range from 7 to 14 GHz. Their complex permeability and permittivity, microwave absorption properties values were calculated. The proposed measurement method can be a useful technique for microwave absorption properties of human blood. Keywords: Human blood, complex permittivity, permeability and microwave absorption PermaLink | Plain Format | Corresponding Author (Erfan Handoko)

968	Physics	ABS-157
Ideal Gas Model of Bose-Einstein Condensates Confined in the Parabolic Trap Teguh Budi Prayitno, Esmar Budi, Riser Fahdiran Universitas Negeri Jakarta Abstract By using the one-dimensional canonical partition function, we modeled an ideal gas-like form of a set of Bose-Einstein condensates confined by a three-dimensional anisotropic parabolic trap. The model itself was constructed by taking the eigenenergies of the one-dimensional Gross-Pitaevskii equation in the longitudinal direction and enabling the harmonic volume as the inverse cube of average geometric trapping frequency to substitute the available volume. In this paper, we showed that the condensates form an ideal gas represented by its equation of state and have similar mature to Einstein solid-like model with corrections both in the low and high temperatures in the internal energy formulations. Keywords: Bose-Einstein condensation, Gross-Pitaevskii equation, quantum oscillator PermaLink | Plain Format | Corresponding Author (Teguh Budi Prayitno)

969	Physics	ABS-417
Interpretation of Conventional Reciprocal Method (CRM) Refraction Data for Identification of Subsoil Structure in the Tourism Area at Batu Kuda Bandung Siti Nurasiah (a), Firman Hadi Muhammad(a) ,Rena Denya Agustina(b*) ,Hamdan Sugilar(c) a) Department of Physics, UIN Sunan Gunung Djati, Bandung b) Department of Physics Education, UIN Sunan Gunung Djati, Bandung *renadenya[at]uinsgd.ac.id c) Department of Mathematicss Education, UIN Sunan Gunung Djati, Bandung Abstract Research in the tourism area at Batu Kuda Bandung has been carried out using Interpretation Conventional Reciprocal Method (CRM) refraction data which aims to produce a seismic refraction data processing GUI using the Matlab programming language, so that it can know the wave velocity value and get 2D cross section. Data obtained in the form of wave propagation time as forward and reverse time, from the travel time of the wave and distance and time geophone analysis. From the results of the interpretation of the data obtained the velocity of P wave propagation in the medium and depth in 2 layers. In the first layer obtained a velocity value of 628.98 m / s with the depth of the first layer ranged from 0 m - 8.73 m, and the seismic wave velocity in the second layer was 1228.99 m / s with the depth of the second layer ranged from 8.73 m - 20 m. Based on the 2D model the distribution pattern of velocity values, it can be indicated that the first layer is the latosol soil layer containing sand, gravel, fine sediment and clay. And in the second layer contains fine deposits, sandstone, gravel, sand, fine sand (silt), clay and clay. These materials as a result of the process of the eruption of an undefined young volcano. Keywords: conventional reciprocal method, seismic refraction data,wave propagation, forward and reverse time PermaLink | Plain Format | Corresponding Author (Rena Denya Agustina)

970	Physics	ABS-930
Heat Energy Conversion on Applied Technology of Geothermal Energy Direct Utilization Untung Sumotarto Universitas Trisakti Abstract Indonesia has a high geothermal energy resource, preserved in many fields. But not all geothermel fields are potential for indirect utilizations such as for electric power generation. A direct utilization of a low potential geothermal energy resource has been performed at Batukuwung geothermal field, Serang, West Java. A simple design of vegetable grain dryer has been created (constructed) using galvanis metal pipes. A reduction of temperature from 63 degrees Celcius at the heat source to 41 degrees Celcius at the dryer tool through galvanis metal pipes is quite enough for vegetable grain drying purposes. It is quite a prospect simple technology to be applied and developed in Indonesia as a geothermal energy country having various vegetable grain products from various plants such as coffee, corn, peanut and many other tropical plantations. Keywords: Low potential geothermal field, heat conversion, grain dryer. PermaLink | Plain Format | Corresponding Author (Untung Sumotarto)

971	Physics	ABS-167
Analysis characteristics of viscosity coefficient using viscosimeter stromer A Malik, M A Hakiki, N Imiyati, P Kurnia, R Zakwandi, W Setya Program Studi Pendidikan Fisika UIN Sunan Gunung Djati Bandung Abstract This research aims to develop methods of measuring the coefficient of viscosity using viscosimeter are analyzed using Newtons law of 1. The viscosimeter stormer came from the simple equipment modifications in the form of a hollow cylinder, laver, a pulley, a ruler, a stopwatch, burdens, taps, boards, iron rods, and rope. The trial results do indicate fairly accurate results with the reference. Furthermore, the equipment used, reaching a level of precision that is good at the moment in the trial to the school community. According to the trial results obtained the relationship between viscosity coefficients against time is inversely proportional. The resulting coefficient of viscosity is greater when the mass of the given object is getting bigger. Keywords: Viscosimeter, Coefficient of Viscosity PermaLink | Plain Format | Corresponding Author (Adam Malik)

972	Physics	ABS-169
[RAV] current meter: Design and development of measuring tools of river flows based on a spring balance A Malik, R Zakwandi, R Anjani, N Riskianti, R D Agustina, C Rochman, D Nasrudin Program Studi Pendidikan Fisika UIN Sunan Gunung Djati Bandung Abstract This research aims to build physics tools of measurement of river flow is current. The tool was developed with the balance spring as a means of collecting the data. data measurement results then analyzed mathematically. It is designed using chloride polyvinyl (PVC) which is waterproof. The result of the test tool shows the average error value of 0.3342% and the value of the standard deviation of 0.1893. So it can be stated that RAV Current Meter has a level of accuracy and the level of accuracy that is high enough. This equipment still needs to be optimized by performing test audiences to see the ease of the user. In addition, the size of the adjustment to the attention of the research further. Keywords: Water Currents, Spring Balance PermaLink | Plain Format | Corresponding Author (Adam Malik)

973	Physics	ABS-171
Experimental Investigation of the Cymbopogon Nardus Essential Oil Extraction by Steam Distillation Muhammad Yakob (a), Hamdani (b), Suheri (b), Muhammad Amin (b*) (a) Department of Physics Education, Faculty of Teaching and Education, Universitas Samudra, Kota Langsa, 24416, Indonesia (b) Department of Mechanical Engineering, Faculty of Engineering, Universitas Samudra, Kota Langsa, 24416, Indonesia (*) hamumar84[at]gmail.com Abstract Gayo Lues is a regency in Aceh Province well known as a producing center for citronella, cymbopogon nardus. Today, the area of production reaches around 34,000 hectares managed by more than 2000 households. Until now, citronella oil was collected by the community through simple extraction technology and has not been able to improve the earnings of farmers. In this study, an experimental study of extraction of citronella essential oil has been carried out using a steam distillation system. The scope of this study is to optimize the extraction process of citronella essential oil using a steam distillation system. The process variables evaluated in this study comprise the extraction time and the nature of raw material (wet or dry). The results confirmed that there was a significant effect of extraction time proceeding the amount of oil produced whereas pressure and raw material requirements strongly influence oil quality. The results of this investigation could secure necessary information for the citronella farmers in Gayo Lues to develop better quality and value of the essential oil product. Keywords: Citronella essential oil. Steam distillation. Energy. Mass transfer. PermaLink | Plain Format | Corresponding Author (Hamdani Umar)

974	Physics	ABS-172
Selection Method to Identify the Dominant Elements that Contribute to Magnetic Susceptibility in Sediment Bambang Heru Iswanto* and Siti Zulaikah** *Department of Physics, Universitas Negeri Jakarta, Jakarta 13220, Indonesia **Department of Physics, Universitas Negeri Malang, Malang, Indonesia Abstract Measurements of the magnetic susceptibility and chemical elements have been carried out on soils or sediments in various depositional environments for various purposes. Theoretically, the magnetic mineral content in nature is generally ferromagnetic which is characterized by the presence of an element of Fe and is positively correlated with the value of magnetic susceptibility. However, the presence of measured elements does not always have a positive correlation with magnetic susceptibility or very low. In this study, we propose a method to find out the magnetic factor that correlates significantly with magnetic susceptibility. The method consists of several steps: (i) a correlation analysis between magnetic susceptibility and each measured element is carried out; (ii) the elements that have a positive correlation are chosen as dominant elements; (iii) determine the magnetic factor as aggregation of the dominant elements. The method has been tested for various depositional environments and successfully found the magnetic factor of dominant elements with a very significant correlation value. The discovery of dominant elements that contributes to magnetic susceptibility will facilitate the determination of the minerals carrying magnetic properties and can be used as an indicator of environmental conditions. Keywords: magnetic susceptibility, chemical elements, selection method, sediment PermaLink | Plain Format | Corresponding Author (BAMBANG HERU ISWANTO)

975	Physics	ABS-440
Theremin as Teaching Aid to Improve Student Understanding of Waves Desyani Ambarwanti(1*), I Made Astra(1), Achmad Ainul Yaqin(2), Iwan Sugihartono(3*) (1)Program Magister Pendidikan Fisika, FMIPA, Universitas Negeri Jakarta, Jl. Rawamangun muka no. 01, Rawamangun, Jakarta Timur 13220, Indonesia (2)Laboratorium kontrol, FMIPA, Universitas Negeri Jakarta, Jl. Rawamangun muka no. 01, Rawamangun, Jakarta Timur 13220, Indonesia (3)Program Studi Fisika, FMIPA, Universitas Negeri Jakarta, Jl. Rawamangun muka no. 01, Rawamangun, Jakarta Timur 13220, Indonesia Abstract Physics learning is taught to equip students with knowledge and understanding of various natural phenomena. In order to improve comprehensive understanding of waves principle for student class of XI, we implement science, technology, engineering, and mathematics (STEM) in physics learning by using theremin based light dependent resistor (LDR). In this paper, theremin as music instrumental non-contact will be used as teaching aid. Physics understanding of the students will be observe and investigated during a class. Analyses will be focus on adjustment of frequency will provide pitch of tones. As results, by theremin, student will have better understanding of waves principles. Keywords: Theremin, STEM, LDR, Frequency, waves PermaLink | Plain Format | Corresponding Author (Desyani Ambarwanti)

976	Physics	ABS-704
Collaborative Teaching in Heat Transfer Lessons for Slow Learner Students AGUS PRATOMO ANDI WIDODO (a*), ASEP BAYU DANI NANDIYANTO (b), ACHMAD HUFAD (c), SUNARDI (d) a)Department of Special Education, Indonesia University of Education *andi.pkh.student[at]upi.edu b)Department of Chemistry, Indonesia University of Education c)Department of Special Education, Indonesia University of Education d)Department of Special Education, Indonesia University of Education Abstract The aim of this study is to develop ways to teach heat transfer lessons to slow learner students. The study used a single-subject research approach with A-B design (baseline and intervention) in inclusive school in Banjarmasin. The subject of this study consisted of three slow learner students. Teaching demonstration methods with collaboration between special teachers and regular teachers are given as independent variables. The results of the study revealed that subjects that require cognitive understanding can be taught to slow learner students. However, the success achieved cannot be separated from collaboration between regular teachers and special teachers. Special teachers play a role in conveying instructions to be simple and concrete. A quiet learning atmosphere in the absence of other audio visual stimuli, besides experimental media that are taught, can make slow learner students more focused. The repetition factor of subject matter by special teachers during learning activities is very helpful because the characteristics of the slow learner are more likely to be short-term memories. Keywords: slow learner, heat transfer, teaching, repetition, regular teacher, special teacher PermaLink | Plain Format | Corresponding Author (Agus pratomo andi Widodo)

977	Physics	ABS-449
Development of Learning Devices Model Problem Based Learning Assisted by Virtual Experiment to Increase Generic Science Skills Baiq Ewik Jiniarti (a), Ahmad Harjono (b), Muh. Makhrus (b) a)Magister Program of Science Education, University of Mataram, 62 Majapahit Street , Mataram, Indonesia b)Departement of Physics, University of Mataram, 62 Majapahit Street, Mataram, Indonesia Abstract Type of research is research and development. This development research aims to produce physics learning device using qualified problem based learning assisted by virtual experiment has a valid, practical, and effective which to increase students generic science skills in subject of optical instruments. Learning device is guided teacher in learn process at class. In this study, the generic skills that discussed on the science field, called generic science skills. The development model had used four D model consisting of define, design, develop and dessiminate phases. Trial of product conducted in students of eleventh grade of the senior high school one east Praya. The method used was pre experiment with one group pretest posttest design. The instruments were validation sheet and observation sheet. The results of the define phase are obtained through curriculum, student analysis, task anlysis, procedural analyisis, concept and specifying instructional The results of the design phase is derived from the design of learning devices model problem based learning assisted with virtual experiment. The result of develop phase based on validation process which obtained data from validator assesments of the lesson plan, students worksheet, learning materials, and test of generic science skills with very valid category. Keywords: problem based learning model; virtual experiment; generic science skills PermaLink | Plain Format | Corresponding Author (BAIQ EWIK JINIARTI)

978	Physics	ABS-460
A systematic effect of clay volume on porosity - P-wave velocity relationship Suryo Prakoso (a*), Muhammad Burhannudinnur (b), Ghanima Yasmaniar (a), Sigit Rahmawan (a) and Syamsul Irham (a) a) Petroleum Engineering, Faculty of Earth and Energy Technology, Universitas Trisakti b) Geological Engineering, Faculty of Earth and Energy Technology, Universitas Trisakti Abstract It has been believed that the P-wave velocity is strongly influenced by complexity of pore arrangement. In Sandstones, pore complexity is influenced by the constituent material of rock including clay volume. Rocks with a certain clay volume will have a certain pore geometry and pore structure and also they have certain qualities. This research is intended to study the effect of clay volume on rock quality and its effect on the relationship of porosity with P-wave velocity. This research used 3 sandstone data sets from the North West Java basin, Kutai basin and Southern Sumatra basin. The mineralogy of each rock sample is dominated by quartz and kaolinite. The three data sets show the relationship of porosity and P-wave velocity can be clearly separated by clay volume. Each of these rock groups indicates rocks of different qualities called rock types. It can be concluded that the variation of P-wave velocity is influenced by rock type. The lower rock quality is denoted by the larger rock type number and is indicated by the increase in clay volume. Keywords: P-wave Velocity, pore arrangement, clay volume, rock type PermaLink | Plain Format | Corresponding Author (Suryo Prakoso)

979	Physics	ABS-720
Collaborative Teaching in Magnetic Field Materials for Students with Deaf and Hard of Hearing (DHH) AGUS PRATOMO ANDI WIDODO (a*), ASEP BAYU DANI NANDIYANTO (b), ACHMAD HUFAD (c), SUNARDI (d) a) Department of Special Education, Indonesia University of Education *andi.pkh.student[at]upi.edu b) Department of Chemistry, Indonesia University of Education c) Department of Special Education, Indonesia University of Education d) Department of Special Education, Indonesia University of Education Abstract The aims of this study to find out how to teach the magnetic field materials to students with deaf and hard of hearing (DHH). The study used a single subject research approach with A-B design (baseline and intervention) in inclusive school in Banjarmasin. The subject of this study consisted of three students with DHH. The results of the study revealed that the magnetic field materials can be mastered by students with DHH. This success is due to the division of tasks or collaboration between special teachers and regular teachers. When the regular teacher explains with media, special teacher plays a role in translating to Sign Language. Not all instructions are translated but only instructions that difficult to understand because basically students with DHH can understand from writing and read the regular teachers’s lips movement. Another factor that shapes understanding of students with DHH are the students seating position. In appropriate position, students with DHH can see regular teacher’s face clearly and help them to read regular teachers’s lips movement. Essentially, students with DHH use their visual abilities to learn. Keywords: students with deaf and hard of hearing (DHH), the magnetic field materials, collaboration, regular teachers, special teachers PermaLink | Plain Format | Corresponding Author (Agus pratomo andi Widodo)

980	Physics	ABS-726
"PASSING" practicum tool for concept of elasticity and Hookes law on springs arranged in series and parallel H Y Suhendi*, E K Yuningsih, D Mulhyatiah, S Nurhasanah Pendidikan Fisika UIN Sunan Gunung Djati Bandung *herni.suhendi[at]uinsgd.ac.id Abstract This study aims to analyze the feasibility of learning media Passing (String Series Parallel) for material elasticity and hooke law. The method used in this study is ADDIE developed by Robert Marie Branch. The stages are Analysis (Analysis), Design (Design), Development (Development), Implementation (Implementation), and Evaluation (Evaluation). The steps of this study are: 1) Curriculum analysis, analysis of the results of interviews and questionnaires of students, and analysis of literature studies, 2) Designing learning media Passing, 3) Realizing Passing practicum tools 4) Conducting expert validation tests 5) Product revisions. The results of the study obtained a tool validation value of 90.47% with a feasible category. This study concluded that Passing is feasible to be used as a learning media in the material of elasticity and hooke law. Keywords: practicum tool, hooke’s law, learning media, ADDIE PermaLink | Plain Format | Corresponding Author (Herni Yuniarti Suhendi)

981	Physics	ABS-216
TUMPULS Teaching Aids as an Alternative Media for Physics Learning Diah Mulhayatiah, Herni Yuniarti Suhendi, Dindin Nasrudin and Resa Farida Ningsih UIN Sunan Gunung Djati Bandung Abstract Development of learning media needs to be done to increase students interest in learning and stimulate teacher creativity in creating an interactive learning atmosphere. This study aims to develop teaching aids as an alternative to physics learning media in momentum material. The method used in this study is research and development with the stages of analysis, design, development, implementation and evaluation. The stage described in this study is the development stage in the laboratory test section. The laboratory test results for momentum props found that the relative error of the data obtained for the initial momentum was 0.1% and the final momentum ranged from 9%. The momentum props developed were able to present data and show momentum calculations through equations Keywords: momentum, impuls, props PermaLink | Plain Format | Corresponding Author (Diah Mulhayatiah)

982	Physics	ABS-477
Development of E book on Momentum and Impulse Material Based on Discovery Learning to Improve Student Science Literacy Novi Anggreani (a*), Vina serevina (b), Bambang Heru Iswanto (b) (a) Program of Pascasarjana Physic, FMIPA, Universitas Negeri Jakarta, Indonesia (b) Department of Physic, FMIPA, Universitas Negeri Jakarta, Indonesia (*) novianggreani120[at]yahoo.com Abstract The standard teaching process in the context of education is not only about how the learning process take place. But it also relates to appropriate and adequate learning resources. The appropriate and adequate learning resources are important factors in the learning process in order to create a productive learning environment. This productive learning environment is the process of creating a learning climate based on environmental regulation, the provision of tools and learning resources that contain learning objectives, materials, methodologies and assessment of learning that enable students to feel comfortable and enjoy learning effectively and optimally according to their needs and technological developments, then adjusted to their interests and potential. This study aims to design and implement an educational process with the help of appropriate learning resources. Thus it will creating a meaningful educational process by discovering for the knowledge of mastery of physical concepts that can support life in understanding daily phenomena with scientific knowledge and science in momentum material and impulses using the development research of borg gall. Thus students can grow and improve scientific literacy. Keywords: e book development, Momentum and Impulse, Student Science Literacy PermaLink | Plain Format | Corresponding Author (Novi Anggreani)

983	Physics	ABS-751
DESIGN AND DEVELOPMENT OF MEASUREMENT OF MEASURING LIGHT RESISTANCE USING LIGHT DEPENDENT RESISTANCE (LDR) SENSORS winda setya (a*), ari ramadhana (a), hawinda restu puti (a), agung santoso (a) a) Department of Physic Education, Faculty Tarbiyah and Teacher Training, UIN Sunan Gunung Djati Bandung Jl. Soekarno-Hatta no. 750, Gedebage, Bandung *suratwindasetya[at]uinsgd.ac.id Abstract Light Dependent Resistance (LDR) is one type of resistor whose resistance value is influenced by the intensity of light received by it. This study aims to measure the amount of resistance in each color of light measured in the LDR. The research method is carried out by making a measurement device in which a light source that is parallel to the LDR is placed, between which a color layer is inserted which will change the white light from the lamp to the color light according to the color layer used. Variation in the distance (x) between lights and LDR causes greater resistance. The results of this study indicate that when the distance of 0.52 m the amount of red resistance is 44000 ± 0.5 Ω with an error 0.00114%, yellow 48300 ± 0.5 Ω with an error 0.00114%, green 96120 ± 26.29 Ω with an error 0.02735%, blue 114910 ± 10.54 Ω with error 0.00917 %, purple 129150 ± 47.79 Ω with an error of 0.037%. These results show an inversely proportional between resistance and light intensity. Keywords: Resistor, Light Dependent Resistance, Light Intensity, Development, Measurement PermaLink | Plain Format | Corresponding Author (winda setya)

984	Physics	ABS-755
The correlation between input voltage with hydrogen production rate by electrolysis using CO2 as catalyst Cecep E. Rustana (a*), Humaira Ihda Rahmi (b), Deni Shidqi Khaerudini (c), Riser Fahdiran (b) (a) Fisika, FMIPA, Universitas Negeri Jakarta *ce.rustana[at]yahoo.com (b) Fisika, FMIPA, Universitas Negeri Jakarta (c) Pusat Penelitian Fisika, Lembaga Ilmu Pengetahuan Indonesia Abstract In this research to reduce energy consumption of the electrolytic hydrogen production process, on the other hand still increase the efficiency, durability, and safety, we propose a catalyst from CO2 that decrease the use of energy and still produce the same amount of hydrogen. Wherein hydrogen and oxygen is produced from splitting carbonic acid (H2CO3) which comes from mixing CO2 and water (H2O). Based on the research conducted, hydrogen production rate when using CO2 as catalyst in lower voltage variation compensated the higher voltage. The best result regarding CO2 as catalyst after 300 minutes of electrolysis process, the lower voltage generate higher hydrogen volume. Keywords: Hydrogen; electrolysis; CO2 as catalyst; carbonic acid PermaLink | Plain Format | Corresponding Author (Humaira Ihda Rahmi)

985	Physics	ABS-501
Microwave absorbing studies of multi-nanolayer magnetic absorbers based on BaFe12O19 and BaFe10CoZnO19 Erfan Handoko1,*, Anggoro. BS1, Iwan Sugihartono1, Mangasi. AM1, Zulkarnain Jalil2, and Mudrik Alaydrus3 1.Dept of Physics. Universitas Negeri Jakarta. Jalan Rawamangun Muka 13220. Jakarta Indonesia 2.Dept. of Physics. Syiah Kuala University. Banda Aceh. Indonesia 3.Dept.of Electrical Engineering. Universitas Mercu Buana. Jalan Meruya Selatan No.1 Jakarta. Indonesia Abstract In order to study a new microwave absorbing properties in the X-band frequency range, magnetic materials of BaFe12O19 and BaFe10CoZnO19 were synthesized by ceramic method. Microwave absorbing properties of multi nanolayer absorbers, composed of BaFe12O19 and and BaFe10CoZnO19 with a total thickness of 1 mm, 2 mm and 5 mm, were characterized at room temperature using vector network analyzer (VNA) Rohde‐Schwarz ZVA 67 to measure the reflected signal (S11) and transmitted signal (S21) for 7 – 13 GHz frequencies. Reflection loss (RL) of multi nanolayer magnetic materials were calculated using the transmit line theory. The RL of microwave radiations from multilayer magnetic materials is calculated and strongly depends on thickness of multi nanolayer absorbers and showed an optimal RL. Keywords: BaFe12O19, BaFe10CoZnO19, reflection loss, multi nanolayer absorb PermaLink | Plain Format | Corresponding Author (Erfan Handoko)

986	Physics	ABS-503
Microwave absorption properties of single and double-layer absorbers based on barium hexaferrite and silica Mangasi. Alion Marpaung1, Erfan Handoko1,*, Zulkarnain Jalil2, and Mudrik Alaydrus3 1.Dept of Physics. Universitas Negeri Jakarta. Jalan Rawamangun Muka 13220. Jakarta Indonesia 2.Dept. of Physics. Syiah Kuala University. Banda Aceh. Indonesia 3Dept.of Electrical Engineering. Universitas Mercu Buana. Jalan Meruya Selatan No.1 Jakarta. Indonesia Abstract In order to study a new microwave absorbing properties of single and double layer barium hexaferrite and silika have been investigated in X-band (8.2–12.4 GHz) frequencies. Barium hexaferrite BaFe12O19 was synthesized by ceramic method and Silica SiO2 was prepared from beach sand. Barium hexaferrite and silica with a total thickness of 2 mm, 4 mm, 6 mm, 8 mm and 10 mm, were characterized at room temperature using vector network analyzer (VNA) Rohde‐Schwarz ZVA 67. Reflection loss (RL) of single and double-layer absorbers of barium hexaferrite and silica were calculated using the transmit line theory. The double-layer absorbers exhibit better absorption performances with a stronger microwave absorption and a wider effective absorption bandwidth in comparison with the single-layer absorbers at the same thickness Keywords: Single and double layer, BaFe12O19, SiO2, reflection loss. PermaLink | Plain Format | Corresponding Author (Erfan Handoko)

987	Physics	ABS-505
Steady-State Thermal-Hydraulic Analysis of a Small Modular Pressurized Water Reactor Kazi Arham Ahmed, Samiah Hassan, Abdullah Al Mashruf and Abdus Sattar Mollah Department of Nuclear Science and Engineering, Military Institute of Science and Technology. Mirpur, Dhaka-1216, Bangladesh. Abstract Many different types of nuclear power reactors are used for electricity generation. The current nuclear power plant is classified as Generation III or lower. Thermal hydraulics analysis plays an important role in design and safety features of a nuclear reactor. The thermal and hydrodynamic objective of the nuclear power plant design is to safely remove the heat generated in the nuclear fuel without producing fuel temperatures without closely approaching the hydrodynamic critical heat flux under steady-state or transient operating conditions. The present research represents a steady-state thermo-hydraulic analysis of in-house design 50 MWe small modular reactor (SMR). The main objective of this work is to ensure that all important thermal hydraulic parameters uphold margins far below the thermal safety margin limits. In this study, we have calculated fuel centre-line temperature, cladding surface temperature, bulk coolant temperature, power density, average heat flux, the departure from nucleate boiling (DNB) heat flux and DNB ratio. An analytical method has been used to calculate the above mentioned parameters by using a computer program based on C programming language. This method has been validated against the available literature values. It is found from our preliminary analysis that these parameters are within the thermal safety margin limits. Further works are in progress to perform thermal hydraulic analysis by using code such as PARET, RELAP, TRAC etc. to finalize the thermal safety margin limits for our conceptual design of SMR. Keywords: SMR, Thermal Hydraulics, C program, Heat flux, DNBR PermaLink | Plain Format | Corresponding Author (Kazi Arham Ahmed)

988	Physics	ABS-1017
APPLICATION OF BLENDED LEARNING ON PHYSICAL LEARNING ABOUT RAY X Prayekti Lecturer of Universitas terbuka Abstract Purpose of this study is to increase student knowledge of x-rays in order to make it easier for students to work on the questions at the end of the semester exam and this knowledge is used in carrying out physics learning in high school. The study sample was 40 Physics Education students at Center-Surabaya who were taking PEFI4421 Atomic Physics courses. The treatment is given to students in the form of conducting face-to-face tutorials that discuss x-rays by applying blended mode and online. Students are given questions to pretend and each student brings a laptop to be able to see the learning video provided by the lecturer from the University of Jember. At the end of the tutorail activity students are given a posttest. The final semester exam results for students are better than before in the 2018.1 semester, averaging 5.72 and in the 2018.2 semester it increases to 7.21. So the advice given even though the learning system applied by Open University is distance learning, then as one of the learning assistance given to students in the form of face-to-face tutorials with blended mode and online in face-to-face tutorial activities. As one of the innovations in learning physics. Keywords: Face-to-face tutorials, Atomic Physics, blended, online PermaLink | Plain Format | Corresponding Author (Prayekti Prayekti)

989	Physics	ABS-506
Structure and magnetic properties of barium hexaferrite BaFe10CoNiO19 films Iwan Sugihartono, Erfan Handoko*, Mangasi. Alion Marpaung Dept of Physics. Universitas Negeri Jakarta. Jalan Rawamangun Muka 13220. Jakarta Indonesia Abstract In this paper, we report a simple method to prepare different concentrations in molarities Co-Ni doped BaFe10CoNiO19 films on the quartz glass substrates by ultrasonic spray pyrolysis. The Samples were prepared by dissolving iron nitrate (Fe(NO3)3.9H2O), barium nitrate (Ba(NO3) 2) in DI water while stirring at 70-80o C. In these solutions Fe/Ba ratios varied from 12 to 6. Precursor solution was sprayed onto the cleaned quartz plates previously heated to 150 – 200o C, using a sprayer and argon as carrier gas. For crystallization the films were annealed in a furnace at a temperature 1000o C for about 3 h in air. Crystal structure of the film was determined by X-ray diffraction using CuK radiation. The microstructure was examined by a JEOL JSM-5310LV scanning electron microscope. The magnetic properties were measured using a vibrating sample magnetometer. The substitution of Fe3+ ion by Co2+ and Ni2+ has changed magnetic properties of barium hexagonal films. Keywords: BaFe10CoNiO19 films, ultrasonic spray pyrolysis, barium hexaferrite PermaLink | Plain Format | Corresponding Author (Erfan Handoko)

990	Physics	ABS-252
REACT DIGITAL AND MANUAL WORKSHEET FOR ENHANCING PHYSICS PROBLEM SOLVING SKILL Diah Mulhayatiah, Dindin Nasrudin, Herni Yuniarti Suhendi, Adam Malik and Nuriah Jamilah UIN Sunan Gunung Djati Bandung Abstract This study aims to find out the comparison of students physical problem solving skill in harmonic vibration material between students who use REACT- digital and manual worksheets. The method used is quasi-experiment with the research sample taken from two classes totaling 60 students of Islamic schools. The results showed that there were no differences in problem-solving abilities between students who learned using REACT-digital and those using REACT- manual worksheets, because there is an increase in problem solving skills between those using REACT-based worksheets both digital and manual. Problem solving ability is one of the competencies that can be possessed by students in the development of the 21st century which can be obtained by learning using material teaching like worksheets. This finding provides very interesting recommendations in the preparation of teaching and learning that using teaching materials in the form of worksheets must be made on their own according to the appropriate strategy Keywords: 21st century skills, Digital media, Harmonic vibration PermaLink | Plain Format | Corresponding Author (Diah Mulhayatiah)

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