Indonesia Conference Directory

Corresponding Author
Hery Suyanto

Institutions
1Physics Dept, Faculty of Mathematics and Natural Sciences, Udayana University, Bukit Jimbaran, Badung, Bali 80361
2Chemistry Dept, Faculty of Mathematics and Natural Sciences, Udayana University, Bukit Jimbaran, Badung, Bali, 80361

Abstract
Abstract. The aim of this work was to classify parts of human tooth surface by laser-induced breakdown spectroscopy coupled with multivariate data analysis. The human tooth was irradiated by 110 mJ Nd-YaG laser (1064 nm) under Helium gas with flow rate of 50 ml/s to produce plasma. Photon emission of the plasma was captured by ocean optic spectrometer HR 200 and was displayed a spectra of intensities vs wavelength. The spectra data were analysed by different strategies in principle component analysis (PCA) algorithm for classifying human tooth surface. The spectra data were split into two ranges that were a full window spectra (FW) and special window spectra (SW). Before PCA analysing, the data were treated by different strategies of transformation namely baseline, area normalisation, derivative and original data. The results showed that the special window spectra using baseline transformation could both clustering and distinguishing parts of human tooth surface clearly.

Keywords
human tooth, PCA, LIBS, full window spectra (FW), special window (SW)

Topic
Physics related sciences

Link: https://ifory.id/abstract/LBRj9wayupAt

Corresponding Author
Amos Ntarisa

Institutions
Kyungpook National University,
Department of Physics
Daegu, South Korea

Abstract
Radon is the most important source of ionizing radiation which poses human health risks. There are three naturally occurring radon isotopes which are Rn-222(radon), Rn-220(thoron) and Rn-219(actinon) with respect half-life of 3.8days, 56 seconds, and 4 seconds. They are formed on the alpha decay of their radium parents Ra-226, Ra-224 and Ra-223 which are members of decay series of U-238, Th-232 and U-235, respectively. The scientists and researchers are continuing designing and developing methods and techniques for measurements of Radon. We are developing a method which can be used to measure the activity concentrations of all three naturally occurring radon isotopes. To measure radon activity concentration we choose the isotope having short half-life from the decay chain. For example to measure Rn-222 activity we select out Po-214 in U-238 decay chain and we set the time difference from 2 μs to 656 μs. The lower limit of 2 μs is adopted to reject the short Bi-212→Po-212 coincidence in the Th-232 chain. This 2 μs is near about 7 half-lives of Po-212. The upper limit was set as 656 μs which is about four half-lives of Po-214. We will report on development of this method in which the analysis of the method will be presented and discussed.

Keywords
Radon; Activity Concentration;Radon Isotopes; Radon measurementss

Topic
Physics related sciences

Link: https://ifory.id/abstract/kD3fKm2JCze8

Corresponding Author
Haris Rosdianto

Institutions
a) Department of Physics Education, STKIP Singkawang
Jl. STKIP, Kelurahan Naram, Kecamatan Singkawang Tengah, Kota Singkawang, Kalimantan Barat, Indonesia
*harisrodianto[at]yahoo.com

Abstract
To evaluate the potential of various types of batteries, the study focused on the differences of voltage and stability between two types of batteries, namely dry cell and alkaline batteries. The data needed in this study was the output voltage of each battery obtained using the Zelscope application. The output voltage data was then processed using Gaussian Probability Distribution Theory. From the results of data processing, the average output voltage value and the standard deviation of each type of battery were obtained. The voltage difference between the two types of batteries is seen from the average output voltage value. The difference in stability between two batteries is seen from the standard deviation value, the smaller the standard deviation means the output voltage variation was more homogen which means the battery was more stable. From each type of battery, a graph was made based on the Gaussian probability distribution theory to compare the steepness of each graph. Overall, it can be concluded that alkaline batteries are relatively more potential compared to dry cell batteries.

Keywords
Gaussian Probability Distribution Theory; Voltage; Stability; Battery; Dry Cell; Alkaline

Topic
Physics related sciences

Link: https://ifory.id/abstract/t2JBhWrpE7j4

Corresponding Author
Rita Juliani

Institutions
Physics Department, Faculty of Mathematics and Natural Science, State University of Medan
Physics Department, Faculty of Mathematics and Natural Science, University of Syiah Kuala Banda

Abstract
The Bahal III temple is ancient relics temple of the Hindu Kingdom. The research is aim to know the under layer structural of Bahal III surface and to determine the minerals contents of boulder sample in Bahal III temple in Portibi region, North Padang Lawas. The research methods are Geoelectric and geomagnetic, and XRD methods. Geoelectric method that used in this research was Wenner-Schlumberger method in two lines. Line length is 155m with 32 electrode and 5m distance each. Geomagnetic method was done by using 60 grids. Geoelectricity data processing used Res2Dinvand software while geomagnetic data processing used Mag2DC software. Data processing of layer contouring used surfer11 software. Data processing of XRD test result used Match3 software.The findings showed that andesite rock layer was found by using geoelectric method with resistivity value 950 - 1500 Ωm suspected as the rock of temple forming in depth 3-12m. Geomagnetic test results showed the susceptibility value 0.034(cgs unit) which is andesite rock. XRD test result for minerals contents of the temple boulder sample was dominated by mineral Silicon dioxide (SiO2) 88.8%, Ferric oxide (Fe2O3) 8.9 %, Magnesium oxide (MgO) 1.7% and Titanium dioxide (TiO2) 0.7 %.

Keywords
Resistivity, Susceptibility, XRD, Bahal III Temple

Topic
Physics related sciences

Link: https://ifory.id/abstract/zEeDqTavdMWG

Corresponding Author
Johannes V.D. Wirjawan

Institutions
Physics Education Department of Widya Mandala Surabaya Catholic University

Abstract
The use of android smart phones has been emerging quite fast. It distracts most of the students attention from their study. While at one side it brings some negative impacts on students, on the other side it opens some opportunity to use the students deep engagement to android smart phones as source of excitement to promote physics-learning media. We have conducted research in Surabaya (Indonesia) and its vicinity to address the use of android smart phones as students physics learning source. Applying 4-D model we develop android mobile apps based physics-learning media on several topics of introductory high school physics. The physics-learning media has been tried out by several groups of students and have received positive comments from the users.

Keywords
android smart phones, high school physics, 4-D model, mobile apps physics-learning media

Topic
Physics related sciences

Link: https://ifory.id/abstract/qT9Ff3KjGLNJ

Corresponding Author
Ricky Syandi

Institutions
a) Department of Physics, State University of Medan, Indonesia
Corresponding Author : topartam[at]gmail.com

Abstract
Active subduction off the Indian Ocean coast of Sumatra, Sumatra Subduction Zone, admits the responsibility of triggering earthquake along the boundary region on Sumatra Island. Lobu Tua Village is located near to coast Sumatra that has an underground layer in the form of Alluvium which is considered in the vulverable subsurface layer. The aim of this research is investigating the characteristics of stratification and soil properties in Lobu Tua village by using geoelectrical Data is collected from resistivity meter of ARES-G4 v4.7 SN: 0609135. Schlumberger Geoelectrical method is applied to do groundwater mapping by resistivity value at some path. The first path shows the results of electrode measurements are 6.38 meters of the base layer from the lateral surface with the area of silt soil 155 meters, may lead to land subsidence (liquefaction). The second path shows the groundwater-surface in the sounding layer is 21 meters with the potential landslides. The 2-dimensional cross-sectional model image was performed to display the cross-sectional resistivity of the rock coating method by using the Res2Dinv.

Keywords
Liquefaction, Schlumberger Geoelectrical Method, Lobu Tua Village

Topic
Physics related sciences

Link: https://ifory.id/abstract/k2YDxgcLHVJK

Corresponding Author
TULUS IKHSAN NASUTION

Institutions
a)Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Sumatera Utara, Medan 2055, Sumatera Utara, Indonesia
b)Integrated Laboratory, Universitas Sumatera Utara, Medan 2055, Sumatera Utara, Indonesia
c)Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Sumatera Utara, Medan 2055, Sumatera Utara, Indonesia

Abstract
MQ137 sensor has been successfully used to control ammonia concentration automatically and realtime in a catfish pond water. The ammonia testing was carried out by bubbling pond water to vaporize ammonia gas to sense by the sensor. The result showed that the could detect the ammonia concentration below 1 ppm and it instructed the water pump to flow the water throught a water filter to reduce the ammonia concenration. The aplication of pond water quality control has resulted in a reduction in the number of catfish deaths due to poisoning.

Keywords
MQ137 Ammonia Sensor, Ammonia Concentration,Catfish ,Realtime

Topic
Physics related sciences

Link: https://ifory.id/abstract/7X6UJtapyhqA

Corresponding Author
TULUS IKHSAN NASUTION

Institutions
a)Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Sumatera Utara, Medan 2055, Sumatera Utara, Indonesia
b)Integrated Laboratory, Universitas Sumatera Utara, Medan 2055, Sumatera Utara, Indonesia
c)Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Sumatera Utara, Medan 2055, Sumatera Utara, Indonesia

Abstract
A water pH control device in catfish farming has been successfully made and tested. The work principle of this device has been designed to maintain the pH of catfish pond water in the range of 6,5-8,5 and it was found that if the Ph value was outside this range, the sensor ordered the water pump to automatically and in realtime drain the pond water throught a filter to return the Ph to the specified value. Thus, the application of this sensor has successded in reducing catfish deaths due to strees.

Keywords
pH Level, Catfish Cultivation, ,Real-Time, Mikrokontroler 328.

Topic
Physics related sciences

Link: https://ifory.id/abstract/NkyYEU9CTqAQ

Corresponding Author
Abd Hakim. S

Institutions
1Department of Physics, Universitas Negeri Medan, Jl. William Iskandar Pasar V, Medan 20211, Indonesia
2Department of Physics, Universitas Sumatera Utara, Jl. Bioteknologi No. 1., Medan 20155, Indonesia
3 Department of Chemistry, Universitas Negeri Medan, Jl. William Iskandar Pasar V, Medan 20211, Indonesia

Abstract
K-175 concrete research has been carried out with two types of volcanic ash addition, namely variations of 0%, 6%, 8%, 10%, 12% (K-175 concrete) and 15%, 20%, 25%, 30% (density analysis XRD). K-175 concrete contributes to residential concrete. The making of K-175 concrete refers to SNI 7394: 2008 with compressive strength criteria of 14.53 Mpa. The method used is Precast concrete with sheet pile type. The making of concrete K-175 with the addition of cube-shaped volcanic ash with 15 cm sides consisting of cement, sand, broken stone, volcanic ash and water. After casting is done, the concrete is soaked in the tub and then removed from the soaking tub after 28 days of age dried for 24 hours. The following is the water absorption test and compressive strength test by selecting 3 samples which have the optimum compressive strength for XRD, SEM and FTIR tests to see the concrete characterization. Analysis of XRD, SEM, and FTIR are in the variation of 0%, 10% and 25% low absorption, compressive strength respectively 21.06 MPa, 21.16 MPa and 19.46 MPa. The pressure strength also fulfills the compressive strength of Portland cement type I which is 20 MPa.

Keywords
Concrete K-175, volcanic ash, absorption, compressive strength, analysis (XRD, SEM, FTIR)

Topic
Physics related sciences

Link: https://ifory.id/abstract/f2qeHnZxKkQ3

Corresponding Author
Donna Helen Rajagukguk

Institutions
a) State University of Medan
Jalan William Iskandar Ps. V, Kabupaten Deli Serdang, Sumatera Utara 20371, Indonesia
*gabejhp[at]gmail.com

Abstract
Mechanical energy is one of the topics of learning physics in high school that is related to concepts and mathematical equations. Modellus is a computer application designed to explore mathematical models based on functions that are represented in the form of animations, graphics, and tables that are useful for focusing learning activities on understanding student physics concepts. In this study describes computational modelling activities using Modellus software and carried out the Modellus quality testing phase as a medium of physics learning to improve understanding of students concepts on the topic of mechanical energy. Based on the data obtained, Modellus is included in the "very good" category used in physics learning especially on the topic of mechanical energy and critical thinking skills students obtain an average score of 65,45 in the “good” category using Modellus.

Keywords
Modelling, Mechanical Energy, Modellus, Critical Thinking

Topic
Physics related sciences

Link: https://ifory.id/abstract/CfnxFbyQwtWu

Corresponding Author
Togi Tampubolon

Institutions
a) Department of Physics, State University of Medan, Indonesia
*topartam[at]gmail.com
b) Center for Space and Remote Sensing Research, National Central University, Taiwan

Abstract
The 7.5-magnitude earthquake was intensified epicenter located in the Mountains Donggala Regency, Central Sulawesi. Devastating earthquake and tsunami on September 2018, that struck and erased urbans and suburbs in stricken city in Central Sulawesi and surrounded. The main priorities of the risk disaster management in post-event are fast and safe detection of geohazards to help search and rescue team do mitigation. Satellite radar and optical remote sensing represent the aim of this research to answer this task with Interferometric Synthetic Aperture Radar (InSAR) by Sentinel-1 Interferometric Wide (IW) Level-1 Single Look Complex (SLC) images and optical satellite data by Sentinel-2 Level-1C product. We collected both of satellite images covering the time interval October 2018 – July 2019. We improved the proposed approach, named as Goldstein interferogram filter and the landslide mapping in Central Sulawesi. The methodology, which is intended as an effective process to suppress phase noise to improve the accuracy assessment and represent the experimental information from a full stack of InSAR data and optical data, is ideally acceptable for geohazard mitigation strategies. This potential method refers to great performance for detecting more than 100 areas affected by active deformation that are most dangerous for one or more risky elements in several parts of three cities.

Keywords
Interferometric Synthetic Aperture Radar (InSAR), Optical images, Deformation, Earthquake

Topic
Physics related sciences

Link: https://ifory.id/abstract/q96dAx82vWb3

Corresponding Author
M. ARI FAHRIL

Institutions
a) Department of physic, Faculty of math and science, University of Sumatera Utara, Jl. Dr. Mansur 9 Medan 20155, Indonesia
*arifahril17[at]gmail.com
b) Physic Department, University of Sumatera Utara, Jl. Dr. Mansur 9 Medan, Indonesia

Abstract
Abstract - In general, high-voltage plants are carried out with large and complicated circuits. As research develops, a more simple and efficient series is needed. The Flyback transformer (FBT) method is one method that is often used in generating high voltage with a low DC voltage source. The advantage of this method is to have a simple, efficient and easy to carry series. This circuit consists of a flyback transformer as its main component. This circuit also consists of an ATMega 328 microcontroller, IGBT, and several other supporting components. The initial voltage comes from the PSA which has produced a DC voltage, then it will be forwarded to the IGBT driver which has been given a frequency from the ATMega 328 microcontroller. IGBT functions as a high frequency switching. After that, IGBT which already has a high frequency will be forwarded to the flyback transformer to produce a high voltage, according to the duty cycle regulated by the potentiometer. Frequency and Duty Cycle will be displayed on the LCD. The application of this tool can be carried out on milk pasteurization systems, dielectrics for food ingredients, food sterilization, and air purifiers.

Keywords
FBT IGBT Duty cycle PWM Frequency ATMega 328

Topic
Physics related sciences

Link: https://ifory.id/abstract/yLc3mGkhKENX

Corresponding Author
Sony Wardoyo

Institutions
(1)Bandung Institute of Technology, Indonesia
(2)University of Cenderawasih, Indonesia
(3)Parahyangan Catholic University, Indonesia

Abstract
The magnetic fields produced by an electromagnet depends on the amount of current and voltage. A single current source can produce multi-field magnetic, the position of the solenoid connected to the current source, where there are multi connectors that can be switched based on the composition of the helical coil and from the data obtained that this can be proved. This research was carried out in a helical and design of copper plates forming solenoid windings, each part of the partition plate numbered 10, 15, 20, 25 and 30 connected to electric currents of 1.5, 3, and 4.5 Ampere and the switch functioned to flow electric current to the partition based on the number of electromagnet plates. The experimental results obtained that the electromagnet design using a copper plate with a switch and partition system The number of plates can produce multi magnetic fields with a single current source with a range of 0 to 8 mT which is measured using Gaussmeter. The benefits of this research will have an impact on physical and engineering research related to the use of electromagnets that are portable and concise but with a single electric current source with multi magnetic fields, besides the next research has the potential to be developed in order to produce high magnetic fields.

Keywords
electromagnet, field, current, plate, copper

Topic
Physics related sciences

Link: https://ifory.id/abstract/ZxGFqaJV9hDN

Corresponding Author
muhtadan muhtadan

Institutions
a) Polytechnic Institute of Nuclear Technology - BATAN Yogyakarta, Jalan Babarsari POBOX 6101 YKBB Yogyakarta 55281, Indonesia
*muhtadan[at]batan.go.id
b) Center of Science and Accelerator Technology - BATAN Yogyakarta, Jalan Babarsari POBOX 6101 YKBB Yogyakarta 55281, Indonesia

Abstract
Yogyakarta Nuclear Area (YNA) is one of BATANs nuclear facility that has many nuclear facilities such as nuclear reactor, accelerator, irradiator, and waste management system. Due to nuclear accident is potentially occur, YNA has nuclear emergency response program and there is preparedness system to support this program. Radiation monitoring system is one of utilization to acquire and record nuclear radiation exposure in the facility and its environment. An Internet of Thing (IoT) based radiation area monitor was developed to improve the system not only to acquire the radiation exposure, but also to distribute the acquired data to the cloud server through internet network. The distributed radiation data can be utilized to analyze nuclear emergence potential in the nuclear emergency response and preparedness system. Area monitor system was designed as sensor network that consists of Geiger Muller detector and high voltage power supply, signal conditioning system, and Arduino as counter and data processor. Data is acquired by detector and it is transmitted to the cloud server through wireless network using node MCU communication module. The acquired data is also stored locally in memory card module. Receiver station system was developed to acquire data from database server to display the radiation exposure in the environment and to identify radiological emergency status. Stability testing already done using chi square test method for the counting system using Sr-90 as radiation source standard, and the testing result was obtained 0.75. This area monitor system was validated using standard area monitor and it mean square error was obtained 0.01. For further development, the system will be combined with smart meteorological system to build the integrated data acquisition system for Nuclear and Radiological Emergency Preparedness System in Yogyakarta Nuclear Area.

Keywords
Radiation Monitor Area, Internet of Things, Radiological and Nuclear Emergency Response

Topic
Physics related sciences

Link: https://ifory.id/abstract/RrGumhzqMdpD

Corresponding Author
Ganesha Antarnusa

Institutions
Department of Physics Education, Universitas Sultan Ageng Tirtayasa, Indonesia

Abstract
This study aims at developing learning media inform of computational simulations of conduction heat transfer based on Gauss-Seidel method in MATLAB R016a software based on STEM (Science, Technology, Engineering, and Mathematics) in a PjBL (Project based Learning) based on local wisdom on the Batu Kuwung. This research is an RnD (Research and Development). The steps used are ADDIE (Analyze, Design, Development, Implement, and Evaluation). The results of this study are in the form of two programs to find out the value of iteration, 2D display of the distribution of heat flow distribution and produce a visualization of the distribution from the initial state to the steady state. So, this software is expected to be good learning media.

Keywords
STEM, PjBL, Learning media, Local wisdom, Batu kuwung

Topic
Physics related sciences

Link: https://ifory.id/abstract/2uaTnxcwpXgr

Corresponding Author
Winut Wongwan

Institutions
Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom 73000, Thailand

Physics program, Faculty of science and technology, Nakhon Pathom Rajabhat University, 73000, Thailand

Physics program, Faculty of science and technology, Thepsatri Rajabhat University, 15000, Thailand

Anuban Changwattahanbok Lopburi School, 15000, Thailand

Abstract
In this research, a small glass melting furnace was built with a dimension of 12 x 12 x 9 cm3. The tracking control and notification systems were developed using the Arduino board running through the internet. The 1.2-mm wires were twisted into the 8.3-mm heating coils with the resistance 12.0 Ω. When 11.0-A current was applied to the heating coil, the furnace can be operated at maximum heating rate around 5.7 ℃/min. and max continuous operating temperature at 1200 ℃. After the test run of this furnace and control system, it was found that this apparatus can be used as a replacement of a traditional one. Furthermore the cost of this furnace is cheaper than a traditional one up to 17 times.

Keywords
Melting furnace, Pot furnace, Temperature controller, Arduino

Topic
Physics related sciences

Link: https://ifory.id/abstract/yzkpt8hL2jAa

Corresponding Author
Dewi Wulandari

Institutions
1Physics Department, Universitas Negeri Medan, Jalan Willem Iskandar, Pasar V, Medan Estate 20221, Indonesia.
2 Theoretical High Energy Physics and Instrumentation Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha 10 Bandung 40132, Indonesia.

Abstract
One contribution of Einstein-s equation is the existence of gravitational waves. The weak gravitational waves are solutions of the linearized Einstein-s equation around a Minkowski spacetime. By using a certain coordinate freedom, waves propagate at the speed of light and propagating plane waves in z-direction gives two polarization states. The geodesic equation gives an oscillating proper distance of two rest particles when gravitational wave passes, while for proper time, no time dilatation meaning each particle has the same proper time. The fluctuation effect of gravitational waves causes ripples in spacetime making each particle feels a tidal acceleration.

Keywords
gravitational waves, Minkowski spacetime

Topic
Physics related sciences

Link: https://ifory.id/abstract/XeJVRFQxTP7Z

Corresponding Author
Henry Dinus Hutabarat

Institutions
Universitas Graha Nusantara Padangsidimpuan

Abstract
Understanding the concept of physics can be influenced by methods used in the learning process. With the cooperative method of type STAD and mapping concept can be seen the level of understanding of physics concept. Both methods are applied to the physics learning process in SMA Negeri 2 Padangsidimpuan class XI semester 2. This test was conducted on two classes with a total of 64 students. This class is divided into control classes and experimental classes. Samples were taken using purposive sampling. From sampling it can be seen that the average pretest on the experimental class is 71.9 and posttets 77.8. So that the average understanding of students who are given an inkuri treatment method is 28.38%. While the average pretets on the control class 65.8 and posttets 72.19. The average increase in the learning outcomes of students given an expository method is 15.02%. Based on test calculation result of tCount > tTable, or > 1.677. This means Ha is acceptable, that is, there is a cooperative influence of the STAD type to understand the physics concept of students.

Keywords
Understanding Concepts, Cooperative Method, Type STAD

Topic
Physics related sciences

Link: https://ifory.id/abstract/9HJkMCvgAhbW

Corresponding Author
Fitriani -

Institutions
1 Doctoral Student Program of Universitas Negeri Medan ,Indonesia
2Departement of Physics Universitas Negeri Medan ,Indonesia
Corresponding author ,Email : nurdinbukit5[at]gmail.com

Abstract
This research aims to get product of learning device of science. The research method which is a research and development (R & D) research with the model of Gall, Gall and Borg. This study finds integrated Science learning model of comic based student books. This product has been validated by a team of experts stating that the ingredients have been performed in accordance with appropriate methods and procedures for needs analysis, planning, evaluation and stages for using the materials for the study. The results of trials on the use of product results that have a real impact on student learning outcomes. The implications of the findings of this study provide inspiration and rolemodel for other teachers in designing their learning materials

Keywords
Integrated Learning, Inquiry Training, Comics

Topic
Physics related sciences

Link: https://ifory.id/abstract/a6dwm4EjGXK9

Corresponding Author
Don Jaya Putra

Institutions
Bandung Institut of Technology
Jalan Ganesha 10, Bandung 40132, Indonesia
*donjayaputra2016[at]gmail.com

Abstract
Sitinjau Laut area of Padang city is very prone to landslides because it has a very steep terrain (70º to 85º), improper land use and high rainfall. In the context of investigating potential landslides in this region, landslide potential analysis was carried out in five locations with a rating method for seven variables; slope, soil and rock structure, effective soil depth, rock weathering level, land use, vegetation density and rainfall. The total value of each location is, the first location has a total value of 26 with a category of severe landslide potential, the second location has a total value of 26 with a category of severe landslide potential, the third location has a total value of 24 with a category of severe landslide potential, the fourth location has a total value 21 with a moderate landslide potential category and the fifth location has a total value of 22 with a moderate landslide potential category. It is hoped that this research can provide input to the Regional Government in the context of landslide mitigation in the region. So that the risks posed by landslides can be minimized for the future.

Keywords
Landslides, disaster mitigation, debris, physical, region

Topic
Physics related sciences

Link: https://ifory.id/abstract/D7Xz4PkW6LVC

Corresponding Author
Nya Daniaty Malau

Institutions
a) Physics Education Department, Universitas Kristen Indonesia
*malaunyadaniaty[at]gmail.com
b) Chemistry Education Department, Universitas Kristen Indonesia

Abstract
The aims of this research is to analysis the potential Quercetin 3,4-dimethyl ether 7-alpha-LArabinofuranosyl-(1-6)-glucoside as an inhibitor Plasmodium falciparum Enoyl Acyl Carrier Protein Reductase (PfENR) compound for antimalaria. The method used to analysis the potential Quercetin 3,4-dimethyl ether 7-alpha-LArabinofuranosyl-(1-6)-glucoside as an antimalaria was insilico approach by molecular docking using Autodock Vina. Based on the free energy parameter analized , the value of free energy is -11.6 kcal /mol with 5 repetisions. The free energy value from the analysis results was quite low, this means that Quercetin 3,4-dimethyl ether 7-alpha-LArabinofuranosyl-(1-6)-glucoside is stable to be used as an inhibitor of Plasmodium falciparum Enoyl Acyl Carrier Protein Reductase (PfENR). Because the lower the free energy of a molecule the more stable the molecule. Based on hydrogen bond parameters, there were hydrogen bonds in Quercetin 3,4-dimethyl ether 7-alpha-LArabinofuranosyl-(1-6)-glucoside and PfENR receptors. This shows that Quercetin 3,4-dimethyl ether 7-alpha-LArabinofuranosyl-(1-6)-glucoside binding PfENR receptors to strong and stable. Based on the parameters of the analysis of Ligand and Receptor Interactions also showed that Quercetin 3,4-dimethyl ether 7-alpha-LArabinofuranosyl-(1-6)-glucoside compounds were stable used as Plasmodium falciparum Enoyl Acyl Carrier Protein Reductase (PfENR inhibitors for antimalaria.

Keywords
docking; inhibitor; Quercetin; antimalaria;

Topic
Physics related sciences

Link: https://ifory.id/abstract/pRe2MzBd4u9r

Corresponding Author
Arinto Yudi Ponco Wardoyo

Institutions
Laboratory of Air Quality and Astro Imaging
Department of Physics, Faculty of Mathematics and Natural Science, Brawijaya University
Malang, Indonesia

Abstract
Particulate matters with the diameter less than 2.5 µm or PM2.5, have known to the health adverse. The developing of a measurement system of PM2.5 with a high precision has become a challenge in the last decade. We design the system using a NOVA SDS011 sensor to measure PM2.5 concentration. The problem is that the sensor has a capacity to measure particulate matter in the range of 0.3 to 10 µm, meanwhile we would like to design the measurement system of PM2.5 with the high precision. The other this is how to optimize the sensor. The factor influenced the sensor optimization has been investigated, such as the range of the particle measurement, a sample flow and sample compartment. The PM2.5 measurement system was calibrated using the 3443 Kanomax dust monitor. The result is that the system works well with the filter take into a role to the PM2.5 concentration measurement, and the sample flow and compartment that are the important factor to increase the precision of 20 %.

Keywords
PM2.5, measurement system, NOVA SDS011 sensor, precision

Topic
Physics related sciences

Link: https://ifory.id/abstract/RhcrxnDNyAm2

Corresponding Author
SAULIM HUTAHAEAN

Institutions
Program Studi Pendidikan Fisika FKIP Universitas Palangkaraya

Abstract
Tujuan dari penelitian ini adalah untuk melanjutkan mengimplementasikan Pembelajaran Pendekatan Scientific Aproach yang Terintegrasi dalam Model Pembelajaran Berbasis Proyek (PBP) Sebagai Upaya Pencapaian Kompetensi Ilmiah Mahasiswa Pada Program Studi Pend. Fisika FKIP UPR pada tahun ke 2. Secara rinci kompetensi yang di teliti adalah keterampilan mahasiswa dalam; (a) melakukan perencanaan, (b melakukan perancangan, (c) melaksanakan penyelidikan, (d) melakukan pelaporan. Metode yang digunakan dalam penelitian ini adalah studi kasus dan desain penelitian praeksperimen dengan rancangan One Group Pretest-Posttest Design, dimana sampel penelitian ini adalah 45 orang mahasiswa prodi fisika yang sedang menempuh mata kuliah pengembangan program pengajaran fisika. Data kuantitatif diperoleh melalui tes kinerja dan tes kognitif yang kemudian dianalisis secara deskriptif. Hasil penelitian menunjukan bahwa implementasi Pembelajaran Pendekatan Scientific Aproach yang Terintegrasi dalam Model Pembelajaran Berbasis Proyek (PBP) membawa dampak pada penguasaan keterampilan mahasiawa dalam hal a) melakukan perencanaan kategori cukup baik b) melakukan perancangan kategori baik ,(c) melaksanakan penyelidikan kategori sangan baik, dan (d) melakukan pelaporan kategori baik.

Keywords
pembelajaran pendekatan Scientific Aproach, pembelajaran berbasis proyek, kompetensi ilmiah

Topic
Physics related sciences

Link: https://ifory.id/abstract/BuyrK3HNk7TG

Corresponding Author
Yudi Guntara

Institutions
Department of Physics Education, Faculty of Education and Teacher Training, Jl. Ciwaru Raya No.25, 42117 Serang, Indonesia

Abstract
Numerical convection and diffusion models can be used to predict air pollutant concentrations in an area. Changes in air pollutant concentration can be analyzed using diffusion equations which depend on the coefficient of intra-particle diffusivity (D). Whereas to find out the changes in air quality categories become polluted using a convection equation which depends on the diffusivity coefficient between particles (Γ). The combination of the two equations can be used to estimate the polluted areas of a region. The results of the climate analysis indicate that Banten Province if viewed from the direction of the wind, is very potential for the development of increased fish production. Meanwhile, if viewed from the temperature and rainfall of Banten Province the potential for agriculture. However, considering that in the western part of the region there is a large industry with a chimney height of 275 meters, so based on atmospheric stability, the distribution of air pollutants spread far outside the industrial area. This will have implications for other regions so that at high concentrations (with diffusion equations) it will change the air quality (with the convection equation) so that in certain regions and at certain times it will become a polluted area.

Keywords
regional detection polluted, convection, diffusion

Topic
Physics related sciences

Link: https://ifory.id/abstract/pa8Mbtk49XjY

Corresponding Author
Kerista Tarigan

Institutions
Department of Physics, FMIPA, Universitas Sumatera Utara, Medan, Indonesia

Abstract
The observation of broadband network seismic had been deployed in Sumatra For-Arc. The waveform data for this study were recorded from January 2014 – December 2016. The earthquake event data were selected with the epicenter of around 95 – 180 in distance and Magnitude with more than 7 Mw. In this case, we use shear wave splitting to determine an anisotropic structure in Sumatra For-arc. Seismic Anisotropy can perform as a tool to classify and observe anisotropic structures of subsurface deformation processes beneath Sumatra For-Arc. The valid outcomes, in this case, have been gained that they only correspond to the upper layer, which has the delay time duration of 0.5 – 0.8 s is the anisotropic layer located in the Mentawai Island. The fast an anisotropic polarization direction found in Sumatra For-arc are parted into NE-SW direction found on the upper layer.

Keywords
Shear Wave Splitting, seismic observation, Anisotropy, Sumatra For-Arc

Topic
Physics related sciences

Link: https://ifory.id/abstract/ur3ZUwtPg9KB

Corresponding Author
Jeddah Yanti

Institutions
a*) Department of Physics, State University of Medan, Indonesia
Corresponding author : topartam[at]gmail.com
b) Center for Space and Remote Sensing Research, National Central University, Taiwan

Abstract
The change of surface vegetation also links to the evapotranspiration pattern so that the moisture flux might be affected by the atmospheric stratiform or convective clouds, meant to be important in balancing hydrological cycle and the more analyzing is necessary to explain this phenomenon. The aim of this paper to analyze the complex phenomenon that link in spatial correlation of cloud response towards land surface change that ensued from cloud microphysical components. Fourteen years from 2003 to 2016 over Indonesia was applied that issued by Moderate-Resolution Imaging Spectroradiometer (MODIS) level-3 (L3) provides both cloud and land surface products. Cloud microphysical features consist of cloud fraction, cloud top pressure, cloud optical thickness, and cloud effective radius, whereas Normalized Difference Vegetation Index (NDVI) was applied to identify the land surface change. The distribution of spatial correlation and probability distribution function are used as the method to determine each cloud microphysical components response to land surface change. Concerning annual result, desirable connections among correlation between NDVI and cloud parameters is rather widely. Probabilistic approach from statistical analysis in the wet season forms palpably pattern (parabolic pattern) rather than a dry season pattern. Correlation values based on spatial analysis between NDVI anomalies and cloud parameter anomalies have a range of values around -0.8 to 0.8. Throughout Indonesia, every correlation between NDVI anomalies and cloud parameter anomalies has a negative correlation. Sumatra, Kalimantan and Papua have a major role to inject negative correlations. This causes this area to be covered with oil palm plantations.

Keywords
Cloud properties, Land Surface Change, MODIS, Indonesia.

Topic
Physics related sciences

Link: https://ifory.id/abstract/uvkABj3Xmf8Y

Corresponding Author
DOMINI LESTARI SINAGA

Institutions
(a) Department of Physics, State University Of Medan, Indonesia
Corresponding Author : topartam[at]gmail.com

Abstract
Reservoir temperature measurements have been carried out using the empirical geotermometer method at the Tinggi Raja Geothermal Simalungun district in order to determine the value of the Tinggi Raja geothermal reservoir temperature. The study was conducted using the Na-K geotermometer method, the Na-K-Ca-Mg geotermometer, a Na-K-Ca-Mg geotermometer to obtain the temperature value of the geothermal reservoir. The results of the study based on the empirical Geotermometer equation show the surface temperature of hot water and the average temperature of the reservoir. The average acceptable temperature of the reservoir is the average temperature calculated using a Na-K-Ca Geotermometer.

Keywords
Geotermometer, Geothermal, Geothermal Reservoir

Topic
Physics related sciences

Link: https://ifory.id/abstract/x27uhrqjKC3Y

Corresponding Author
Jurubahasa Sinuraya

Institutions
Physics Department, Mathematics and Natural Sciences Faculty, Universitas Negeri Medan

Abstract
Creativity is one of the important elements in learning physics but is rarely studied to find out the effects of teaching applied to increasing creativity. The research is intended to describe the use of The ICARE Practice Based on Worksheet in increasing student creativity in the Physics Education Study Program. The course assessment formally uses The ICARE Practice Based on Worksheet and the Independent Torrance Test for creativity. At the beginning of the lesson given an explanation of work instructions followed by group organizing. The group used the The ICARE Practice Based on Worksheet to conduct physics experiments with the guidance of lecturers. The experimental results of each group were presented by each group and continued with interactive debates between presenters and comparison groups. Input provided by lecturers and students is used to make reports individually. The Independent Torrance Test is given as a pretest and posttest. Increased creativity is an effect of applying the The ICARE Practice Based on Worksheet in experimentation. The gain based test results were obtained from the posttest and pretest ratings. The test results show that improvement through creativity indicators is achieved on Originality, Flexibility, and Elaboration. The indicator has an increase of more than 70 % of the number of students. This increase does not occur in the Fluency indicator.

Keywords
ICARE; Worksheet; Creativity; Physics Experimental

Topic
Physics related sciences

Link: https://ifory.id/abstract/wtcyHF48xMTg