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
Mitra Djamal

Institutions
Department of Physics, InstitutTeknologi Bandung, Bandung, Indonesia

Abstract
The rapid development of agricultural products industry in Indonesia presents a new challenge for the industry. The high demand for agricultural products makes the industry must think to manage the plantations more effectively and efficiently. One of the problems in plantations is the process and procedure of weighing agricultural products. At this time the process of weighing agricultural products takes a long time and a long procedure. In the industry, processes and procedures for weighing agricultural products as they are today being considered inefficient. Direct weighting at the time of collection is assessed to be rapid and highly beneficial to the industry. But there is a problem when weighing is done directly. If weighing is done directly at the time of collection, then the weighing is done under dynamic conditions. To be able to solve the problems in weighing the agricultural products then proposed a study to build a dynamic weighing system that can weigh dynamically where direct weighing agricultural products can be done at the time of collection. The force transducer will measure the force applied by the weighing system and the load in the form of industrial products. Because the system works in a dynamic state, the forces acting on the force transducer can be calculated using Newtons second law and where is the deformation acceleration of the force transducer which is proportional to the acceleration of the weighing system, is the mass of the weighted system supported by the force transducer and is the mass of the product being weighed. The deformation acceleration of this force transducer is measured using a flat coil.

Keywords
Measuring, Agricultural Product

Topic
Thin film and application

Link: https://ifory.id/abstract/GBQA6rnuR8WE

Corresponding Author
Raden Oktova

Institutions
Physics Education Dept., Faculty of Teaching and Education, Ahmad Dahlan University, Campus IV, Ring Road Selatan, Tamanan, Banguntapan, Bantul, Yogyakarta 55191, Indonesia

Abstract
This paper presents a calculation of the β- decay of the neutron-rich nucleus Nd152 using the proton-neutron Quasiparticle Random Phase Approximation (pn-QRPA) model. The single-particle ground states are calculated self-consistently using the Fayans energy density functional in a Hartree-Fock-Bogoliubov (HFB) scheme for deformed nuclei. The quasiparticle states which are needed for the pn-QRPA calculation are calculated from the HFB single-particle ground states using the Bardeen-Cooper-Schriefer (BCS) approximation. Only Gamow-Teller β- excitations are considered, and two kinds of excitation force are used to excite the daughter nucleus to produce the β- decay: (a) a pure Migdal force, and (b) a Migdal force plus a correction term obtained self-consistently from the BCS quasiparticle basis. The calculations with the pure Migdal force and the corrected Migdal force give half-lives of 5.92 min and 6.91 min, respectively, which are about one half of the experimental value of 11.6(7) min, and decay energies of 1.38 MeV and 1.33 MeV, respectively, both close to the experimental decay energy of 1.12 MeV. The correction to the Migdal excitation force turns out to improve the accuracy of the calculations.

Keywords
proton-neutron QRPA, β- Decay, Nd152, Fayans Energy Density Functional

Topic
Energy and environment materials

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

Corresponding Author
Ganesha Antarnusa

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

Abstract
Polyethylene glycol (PEG) coated magnetite Fe3O4 nanoparticles has been successfully shyntesized by using chemical co-precipitation method with variation concentrations. The magnetite Fe3O4 nanoparticles used as a bimolecular labels (nano-tags) exhibiting a soft magnetic behavior with Ms of 77.16 emu/g and Hc of 49 Oe respectively and polyethylene glycol (PEG) as a stabilizer and dispersant. XRD patterns and transmission electron microscopy (TEM) images showed that Fe3O4 was well crystallized and it grew in their inverse spinel structure with an average size of around 10 nm. Fourier transform infrared spectroscopy (FT-IR) results suggest that PEG indicated with Fe3O4 via its carbonyl groups. Result of Vibrating Sample Magnetometer (VSM) shows that Fe3O4 have exhibited good magnetic response and easily attracted to a magnet placed beside with superparamagnetic behavior. Such Fe3O4 nanoparticles with favorable size and tunable magnetic properties are promising biosensor applications.

Keywords
Polyethylene glycol (PEG); magnetite Fe3O4 nanoparticles; chemical co-precipitation

Topic
Nano-materials and applications

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

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
Qamaruddin -

Institutions
Sekolah Tinggi Ilmu Maritim “AMI”, Jakarta

Abstract
The objective of this research is to examine the mechanical properties and micro structure of body valve bolts of the alloy steel grade B7 material after being applied for more than 12 months by offshore location. The experimental steps conducted in the research were specimens check based on maker specification, preparation of specimens, tensile and hardness tests for mechanical properties and metallography for micro structure, analysis and conclusion. The total specimens used were 18 bolts. Based on the research, it was found that the tensile strength and hardness were 94.9 kgf/mm2 and 30.0 HRC respectively, the micro structure was consisting of ferit and pearlit. Comparing the result of testing of the used body valve bolts to the new ones and to the standard ones by ASTM A193, it can be concluded the used bolts remained re-useable on condition that there were no defect and corrosion existing.

Keywords
body valve bolt, alloy steel grade B7, tensile test, hardness test, offshore application

Topic
Metal alloys, ceramics and composite materials

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

Corresponding Author
Eva Marlina Ginting

Institutions
1 Department of physics, Universitas Negeri Medan,Indonesia
2 Faculty of Engineering ,Universitas Quality ,Indonesia
3Department of physics, Universitas Quality Berastagi ,Indonesia

Abstract
The study aimed to determine the effect of the addition of carbon black (CB) and Palm Empty Bunch Powder (OPBEP) as a filler in natural rubber compounds on thermal and transmittance properties. The composting method is done at the Open mill. The process of mixing natural rubber with additives, curative agents, activators, accelerator materials, and nano OPBEP and CB with variations (0.2; 4; 6; 8)% wt. The results of the study were obtained. FTIR results from the compound with CB and OPBEP fillers as a whole showed almost the same results. This is due to modifications so there is a possibility of overlapping with the uptake on other bands. There is a peak of 2912 C – H asymmetric symmetric stretching vibrations of octadecylamine, respectively. Bending vibration of C – H in the = CH group of 3,4- or 1,2-units. The thermal properties of the DSC thermogram obtained an increase in the melting point and cross-linking with an increase in the content of the OPBA element compared with no filler as well as the CB In general, a compound with OPBEP filler and CB can be used as a technical product that has more mechanical properties.

Keywords
: OPBEP, CB, natural rubber compounds, Thermal properties

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/6YfVpANUWJbX

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
Afrida Hafizhatul Ulum

Institutions
a) Instrumentation and Computational Physics, Department of Physics, Institut Teknologi Bandung, Indonesia
*afridahafizhatululum[at]gmail.com
b) National Electronics and Computer Technology Center, National Science and Technology Development Agency, Pathum Thani 12120, Thailand

Abstract
Surface enhanced Raman scattering substrate was an alternative analytical tool with ultrahigh sensitivity and rapid response for chemistry, medicine and forensics science. In this work, the surface enhanced Raman scattering (SERS) substrate based on PDMS grating structure created by laser interference lithography using excimer laser modification and further 80 nm-thick Au thin film deposition by dc magnetron sputtering was proposed. We investigated the effect of the grating depth on SERS performance. The methylene blue solution of different concentration was employed to test the SERS performance using the portable Raman spectrometer. The optimal SERS performance can be optimized by fabricating the PDMS grating structure with 850 nm-period, 310 nm-depth and 0.5-filling factor

Keywords
SERS, laser interference lithography, magnetron sputtering, PDMS grating

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/6aUDCfP2cQGR

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
Makmur Sirait

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

Abstract
Nano-hydroxyapatite had been synthesized by the basic ingredients of limestone using an alkaline precipitation method. Hydroxypatite synthesis was done by using H3PO4 0.3M solvent as a source of phosphate and NH4OH 1M as pH controller. The hydroxyapatite powder obtained was characterized by XRD, SEM and FTIR. The XRD test was done to determine the constituent compounds and the crystalline hydroxyapatite that had been made. From the results of the characterization of XRD powder had been formed into Calcium phosphate hydroxide (Ca10H3O27P6) compound or hydroxyapatite with hexagonal crystal form. The nanocrystalline size of the limestone hydroxyapatite powder was 66.05 nm. The SEM test was done to determine the pore size and Ca/p ratio of the limestone hydroxyapatite that had been made. From the SEM morphology test, the pore size obtained was 64.43 nm and the Ca /p ratio was 1.25.

Keywords
Hydroxyapatite; Limestone; XRD; SEM; FTIR

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/Ma4hkZHQ7R6f

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
Riser Fahdiran

Institutions
(a) Department of Physics, State University of Jakarta, Jalan Rawamangun Muka, Jakarta Timur, 13220, Indonesia
(b) Department of Chemistry, State University of Jakarta, Jalan Rawamangun Muka, Jakarta Timur, 13220, Indonesia

Abstract
We study the evolution of cluster formation on ultrafast laser induced ablation of Gold nanoparticle by means of Molecular Dynamics simulation. The energy given to the system are in two regime, the lower energy is able to ablate and the higher energy evaporate the nanoparticle into finer cluster. The case for lower energy, the system formed a shell structure with smaller clusters reside within, while for higher energy the system are evaporated and dominated with monomers and small clusters around. The evaporated case shows a compressive pressure all over the simulation time while for lower energy case, tensile pressure are responsible for the fraction of the nanoparticle. Small angle scattering analysis performed at the end of simulation indicated the distribution of cluster sizes are linearly correspond to the cluster size analysis obtained by following trajectories of each atom from Molecular Dynamics scheme.

Keywords
cluster; nanoparticle; small angle scattering; Gold

Topic
Computational and characterization of materials

Link: https://ifory.id/abstract/7wm6zMx2Rhe9

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
Rizal Arifin

Institutions
a) Department of Mechanical Engineering, Universitas Muhammadiyah Ponorogo, Jl Budi Utomo No. 10 Ponorogo, 63471 Indonesia
*rarifin[at]umpo.ac.id
b) Center of Materials Engineering and Energy, Universitas Muhammadiyah Ponorogo, Jl Budi Utomo No. 10 Ponorogo, 63471 Indonesia
c) Department of Informatics Engineering, Universitas Muhammadiyah Ponorogo, Jl Budi Utomo No. 10 Ponorogo, 63471 Indonesia

Abstract
In this paper, we evaluate the structure of glassy NiTi at the temperature of 10 K obtained from molecular dynamics simulations by various cooling times. The final configurations of glassy NiTi were produced by decreasing the temperature of the liquid NiTi rapidly from 2500 K until 10 K during 0,1 ns to 1 ns of cooling times. We find in our result that the count of BCC-like and Icosahedral-like local structure increase at the longer cooling times, while the count of HCP-like local structure decrease when the cooling times become longer. We also observe that the count of FCC-like local structure almost remains constant for all cooling times variation.

Keywords
glassy NiTi, local structure, cooling times, molecular dynamics simulations

Topic
Computational and characterization of materials

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

Corresponding Author
Sudipta Saha

Institutions
(a) Kyungpook National University, Daegu, South Korea

*Corresponding Author: hongjoo[at]knu.ac.kr

Abstract
For the purpose of neutron imaging, scintillation crystals composed of Li, B or Gd, which have very high thermal neutron absorption coefficients are becoming popular. These crystals can provide distinct luminescence properties with different rare earths dopants (Ce3+, Dy3+, Eu3+ etc.). In the present work, Li6Y(BO3)3 (LYBO) pure and doped with 4 mol% Dy3+ single crystals have been grown using the Czochralski method. X-ray induced luminescence properties have been studied for both pure and doped crystal at room temperature. Thermoluminescence properties of both pure and 4 mol% Dy3+ doped LYBO crystals have been evaluated at low temperature from 10 K to 320 K and at high temperature from 326 K to 670 K separately. Photoluminescence, decay time and beta scintillation counts have been measured in low temperature from 290 K to 10 K for 4 mol% Dy3+ doped LYBO crystal. Characteristic emission of Dy3+ ion has been observed for LYBO crystal doped with 4 mol% Dy3+ under X-ray irradiation. The maximum intensity of excitation and emission peaks are found at 350 nm and 578 nm, respectively. Decay time decreases from 690 μm at 290 K to 655 μm at 10 K. Thermoluminescence emission of both pure and doped crystal is similar at low temperature but differs at high temperature. Scintillation beta counts has also been decreased while measuring from 320 K to 10 K. In future, the crystal will be tested as a thermal neutron scintillator for imaging.

Keywords
Crystal, Luminescence, Scintillation, Decay time

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/rQwm9DkYCUua

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
Rachmad Almi

Institutions
(a) Department of Physics Education, Faculty of Teaching and Education, Universitas Samudra, Kota Langsa, 24416, Indonesia
(b) Department of Physics, Faculty of Engineering, Universitas Samudra, Kota Langsa, 24416, Indonesia

Abstract
The identification of a particular illness is usually done by microscopical check-up from the phlegm, urine, blood, Rontgen, and CT-scan. This technique needs a long period, high cost, and complicated procedure. As a result, society feels reluctant to check up on their health. Thus, research of an instrument that can define and diagnose the illness easily, efficiently, and accurately is needed. This research developed a prototype of an electronic nose that consists of a gas sensor that can respond quickly the element of volatile organic through the breathing air. Principal component analysis (PCA) method is the most appropriate method to classify the type of illness visually and then the algorithm of AI in Neural Network is constructed to automatic identification of the type of patients illness. Therefore, this research is needed to be applied in medical instrumentation.

Keywords
PCA; tract; e-nose; respiratory

Topic
Sensing materials and applications

Link: https://ifory.id/abstract/7aJ3wvhVb8dK

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
HERI SUGITO

Institutions
Physics Department, Diponegoro University

Abstract
Detection of heavy metal containment of soil pollution has been made by using laser-induced breakdown spectroscopy (LIBS). A pulsed Nd:YAG laser (1064 nm, 8 ns, 200 mJ) was focused on to a soil sample, which is prepared in the form of pellet, at atmospheric pressure. Emission spectra taken from the oil-contaminated soil and uncontaminated soil were obtained. The contaminated soil has almost the similar spectrum profile and contains the same major and minor elements as for the uncontaminated soil case. However, C-H molecular band was clearly detected in oil-contaminated soil, while no C-H band was detected in uncontaminated soil. For comparison, the emission spectra of contaminated and uncontaminated soil were also obtained by using XRD method, showing that the spectra taken by using LIBS is much better than the XRD case indicated by signal to noise ratio (S/N ratio).

Keywords
Laser-Induced Breakdown Spectroscopy, Soil Pollution

Topic
Computational and characterization of materials

Link: https://ifory.id/abstract/B8Q6nrdM7Wy4

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
Pham Hong Minh Pham

Institutions
1Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam
2Institute of Laser Engineering, Osaka University, Suita Osaka 565-0871 Japan
3Centre for Theoretical Chemistry and Physics, School of Natural and Computational Sciences, Massey University, Albany, Auckland 0632, New Zealand

Abstract
We report the successful development of an all-solid state laser based on a Czochralski method-grown cerium-doped lithium calcium aluminum fluoride (Ce3+:LiCaAlF6) crystal as the gain medium. Results for the broadband, narrow linewidth and short pulse laser emission are obtained by pumping with 7 ns pulses at 266 nm from the fourth harmonics of a Nd:YAG laser operating at 10 Hz repetition rate. The effects of output coupler reflectivitiy, resonator length and pump energy on the laser pulse duration were explored. With broadband configuration, a maximum output pulse energy of a few mJ was achieved. Sub-nanosecond UV laser pulses were generated from a low-Q and short resonator under near threshold pump energy. By replacing the end mirror with a grating, tunability from 281 nm to 299 nm with linewidth of about 0.2 nm is achieved. For high power ultrashort ultraviolet laser development, we have investigated the prospects of using a diamond-cut Ce:LiCAF crystal in a two-side-pumping configuration, and performed calculations on the optimum geometry, size, and absorption coefficient that will serve as a guideline when developing a UV laser oscillator and femtosecond amplifier. Results show that there is a trade-off between homogeneity and absorption ratio for absorption coefficients greater than 1.5 cm−1. Moreover, a larger crystal with lower doping concentration would be more homogeneous and would have a higher absorption ratio, regardless of geometry. Our results suggest the possibility of developing an all-solid-state ultraviolet laser operating at TW level by appropriately designing the amplifier crystal in conjunction with a multiple-beam side-pumping configuration.

Keywords
ultraviolet laser; short pulse laser; tunable laser; narrow linewidth laser; transient resonator; rare earth-doped fluoride

Topic
Optical, luminescence, Electronic Materials and applications

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

Corresponding Author
Jaeyoung CHO

Institutions
Kyungpook National University

Abstract
New neutron detectors are being developed as demand for security applications increases. Li-containing single crystal has a significant results such as Cs2LiYCl6 (CLYC), Cs2LiLaBr6: Ce (CLLB) and LiI. Their performance of pulse shape discrimination of neutron/gamma makes it possible to detect neutron/gamma with a single material. However, there is difficulty such as material cost, handling, complexity and hygroscopic in crystal growth. In particular, CsI(Tl) crystal scintillator doesn-t have such difficulty with good scintillation performance. Therefore, we developed Li co-doped CsI(Tl) crystal scintillator for neutron detection. Thermal neutron detection is realized by the 6Li(n,t)α neutron capture reaction. The reaction products, an alpha particle and a triton, deposit a total of 4.8 MeV energy in the crystal. In this poster, Li co-doped CsI(Tl) single crystals have been studied with optical scintillation properties and neutron/gamma capabilities

Keywords
CsI(Tl), neutron detection,

Topic
Sensing materials and applications

Link: https://ifory.id/abstract/TnZKbA86EuUM