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The origin of New Physics: Sae Mulli (NPSM, ISO abbreviation: New Phys.: Sae Mulli.): Sae Mulli (새물리 in Korean characters means ‘new physics’) is the oldest Korean pure scientific journal. It was first published in 1961 just after the Korean War by the Korean Physical Society (KPS). The primary mission of Sae Mulli was to start building up Korean physics research community from almost nothing and in fact Sae Mulli had made tremendous contributions to the Korean science community. Through a peer-review system, Sae Mulli had continued elevating the level of scientific researches, consequently becoming a cornerstone of the economic miracle of Korea...

Editor-in-Chief : Sunglae CHO
New Physics: Sae Mulli Editorial Board

  • pISSN : 0374-4914
  • eISSN : 2289-0041
Research Papers
Research on Reactor Neutrino Event Selection by Using the Machine Learning Technique
Chang Dong SHIN1, Kyung Kwang JOO*1, Dong Ho MOON1, Myoung Youl PAC2, Junghwan GOH3
1Institute for Universe & Elementary Particles, Department of Physics, Chonnam National University, Gwangju 61186, Korea
2Institute of High Energy Physics, Dongshin University, Naju 58245, Korea
3Department of Physics, Kyung Hee University, Seoul 02447, Korea
For the next-generation massive neutrino experiments, selecting a signal in the background events is very important. To do this, we investigated the results of applying a machine learning technique to the selection of neutrino signals. The neutrino signal after inverse beta decay and the background events in a gadolinium-loaded liquid scintillation detector were reproduced by using Monte Carlo simulations. The inverse beta decay process is well-known and has relatively high statistical quantities for this simulation. In this study, an efficiency of signal selection through machine learning was obtained, and in this paper several results are briefly described. Finally, the machine learning technique is expected to become an important tool for use in the next-generation neutrino experiment.
New Phys.: Sae Mulli 2019; 69: 813-817
Photoluminescence Study of Type-II Submonolayer Quantum Dots
inseak KIN1, Hyun-Jun JO1, Mo Geun SO1, Jong Su KIM1*, Yeongho KIM2, Sang Jun LEE2, Seung Hyun LEE3, Christiana B. HONSBERG4, Heedae KIM5
1Department of Physics, Yeungnam University, Gyeongsan 38541, Korea
2Division of Convergence Technology, Korea Research Institute of Standards and Science, Daejeon 34113, Korea
3Department of Electrical and Computer Engineering, Ohio State University, Columbus, USA
4School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, USA
5School of Physics, Northeast Normal University, Changchun 130024, China
We have studied the optical properties of InAs/GaAsSb submonolayer quantum dots (SML-QDs) through excitation intensity ($I_{\text{ex}}$) and temperature dependent photoluminescence (PL) experiments. The SML-QDs with type-I (T-1) and type-II (T-2) band structures were grown using a GaAsSb spacer with a Sb composition of 0\% and 15.8\%. At 13~K, the PL signals from the T-1 and the T-2 samples were observed at 1.42~eV and 1.37~eV, respectively, when the $I_{\text{ex}}$ was 8.7~mW/cm$ ^{2}$. The PL signal of the T-1 sample is due to the recombination of electrons and holes in the InAs SML-QDs. The PL signal of the T-2 sample is due to the recombination of electrons (in the GaAs electron band) and holes (in the GaAsSb spacer hole band) by type-II band alignment formed between GaAs and GaAsSb. The full widths at half maxima (FWHMs) of the T-1 and the T-2 samples were 7.09~meV and 24.6~meV, respectively, because the T-2 sample has a lower uniformity than the T-1 sample. As the excitation intensity was increased, the PL signals of the T-1 and the T-2 samples shifted to lower energy because of the quantum-confined Stark effect. As a result of these temperature-dependent PL experiments, the activation energy of the T-1 sample was found to be 30~meV.
New Phys.: Sae Mulli 2019; 69: 794-799
New Phys.: Sae Mulli 2019; 69: 787~882
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Research Papers
A Local Structural Phase Transition of VO$_{2}$ Studied Using EXAFS
Sang-Wook HAN*, In-Hui HWANG
New Phys.: Sae Mulli 2019; 69: 787-793  https://doi.org/10.3938/NPSM.69.787
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Photoluminescence Study of Type-II Submonolayer Quantum Dots
inseak KIN, Hyun-Jun JO, Mo Geun SO, Jong Su KIM*, Yeongho KIM, Sang Jun LEE, Seung Hyun LEE, Christiana B. HONSBERG, Heedae KIM
New Phys.: Sae Mulli 2019; 69: 794-799  https://doi.org/10.3938/NPSM.69.794
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Effect of Si Raw Material on the Optical Properties of the Eu$^{3+}$ and Eu$^{2+}$ Doped in Li$ _{2}$SrSiO$ _{4}$
Purevdulam NAMKHAI, Kiwan JANG*
New Phys.: Sae Mulli 2019; 69: 800-805  https://doi.org/10.3938/NPSM.69.800
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Investigation of Defects Generated During the Epitaxial Lift-off Process in a Flexible GaAs Solar Cell
Mo Geun SO, Sang Jo LEE, Hyun Jun JO, Jong Su KIM*, Thuy Thi NGUYEN, Yeongho KIM, Sang Jun LEE, Heedae KIM
New Phys.: Sae Mulli 2019; 69: 806-812  https://doi.org/10.3938/NPSM.69.806
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Research on Reactor Neutrino Event Selection by Using the Machine Learning Technique
Chang Dong SHIN, Kyung Kwang JOO*, Dong Ho MOON, Myoung Youl PAC, Junghwan GOH
New Phys.: Sae Mulli 2019; 69: 813-817  https://doi.org/10.3938/NPSM.69.813
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What is Physics Education?: Focusing on Changes in Pre-service Teachers’ Understanding in a New Physics Education Course
Gyoungho LEE*, Hongbin KIIM
New Phys.: Sae Mulli 2019; 69: 818-830  https://doi.org/10.3938/NPSM.69.818
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Analysis of the Curriculum and the Professors’ perceptions of the Introductory Physics Laboratory in Korea
Heekyong KIM, Bongwoo LEE*
New Phys.: Sae Mulli 2019; 69: 831-841  https://doi.org/10.3938/NPSM.69.831
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Equilibrium Restricted Solid-on-Solid Model in Higher Dimensions
Dae Ho PARK, Jin Min KIM*
New Phys.: Sae Mulli 2019; 69: 842-845  https://doi.org/10.3938/NPSM.69.842
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Review of the Principles and the Applications of Fluorescence Correlation Spectroscopy
Jaeran LEE, Sok Won KIM*
New Phys.: Sae Mulli 2019; 69: 846-854  https://doi.org/10.3938/NPSM.69.846
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A Study on the Optical Design and Improvement of Optical Characteristics of LED flat Lighting System According to the Light Source and Pattern Shape Arranged at Corners
So Hee PARK*
New Phys.: Sae Mulli 2019; 69: 855-860  https://doi.org/10.3938/NPSM.69.855
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Study on Improvements in the Emission Properties of Quantum-Dot Film-Based Backlights
Su Jeong KIM, Hyo Won JANG, Jung-Gyun LEE, Jae-Hyeon KO*, Young Wook KO, Yongduk KIM
New Phys.: Sae Mulli 2019; 69: 861-866  https://doi.org/10.3938/NPSM.69.861
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Dynamics of Photoinduced Anisotropy in Poly(Methyl Methacrylate) Doped with DO3
Yang WU, Hyo Jin SEO, Sun Il KIM*, Dong Soo CHOI, Hyun Kwan SHIM
New Phys.: Sae Mulli 2019; 69: 867-873  https://doi.org/10.3938/NPSM.69.867
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Study of the Signal Response Domain in a Spiking Neural Network Model
Myoung Won CHO*
New Phys.: Sae Mulli 2019; 69: 874-881  https://doi.org/10.3938/NPSM.69.874
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Erratum
Erratum: Gamma-Ray Spectrometry to Find the Distribution of Diffused Radioactive Sources Underground
Byung Chae LEE*, Sang Bum HONG, Bum Kyung SEO, Jun Ha KIM, Yong Uhn KIM
New Phys.: Sae Mulli 2019; 69: 882-882  https://doi.org/10.3938/NPSM.69.882
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