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Aims and Scope

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
Magnetic Resonance Study of $^{7}$Li and $^{39}$K Nuclei in Li$_{3}$K(SO$_{4}$)$_{2}$ Single Crystals
Tae Ho YEOM*
Department of Laser and Optical Information Engineering, Cheongju University, Cheongju 28503, Korea
Li$_{3}$K(SO$_{4}$)$_{2}$ single crystals were grown and the lattice constants were determined by using X-ray diffraction. The nuclear magnetic resonances (NMR) in the $^{7}$Li and the $^{39}$K nucleus in Li$_{3}$K(SO$_{4}$)$_{2}$ single crystals were investigated by using Fourier transform NMR (FT-NMR) spectrometry. The quadrupole interaction of $^{7}$Li nuclei decreases as the temperature is increased. $T_{1}$, the spin-lattice relaxation time, for $^{7}$Li and $^{39}$K in Li$_{3}$K(SO$_{4}$)$_{2}$ crystal was analyzed in the temperature range of 180 K -- 430 K. The $T_{1}$ values for the $^{7}$Li and the $^{39}$K nuclei in the crystals decrease linearly as temperature is increased. The mechanism of the spin-lattice relaxation for both the $^{7}$Li and the $^{39}$K nuclei in Li$_{3}$K(SO$_{4}$)$_{2}$ single crystals seems to be a single-phonon direct process, not a Raman process. $E_{a}$, the activation energies for the molecular motions of the $^{7}$Li and the $^{39}$K nuclei surrounded by oxygen atoms were found to be 3.08 $\pm$ 0.19 kJ/mol ($\omega_{0}$/2$\pi$ = 77.27 MHz) and 2.52 $\pm$ 0.19 kJ/mol ($\omega_{0}$/2$\pi$ = 155.51 MHz) for $^{7}$Li nucleus and 1.36 $\pm$ 0.08 kJ/mol (18.67 MHz) for the $^{39}$K nucleus.
New Phys.: Sae Mulli 2020; 70: 405-411
Calculation Method of Total Energy and Atomic Interaction Potential Through Machine Learing Using a Neural Network of Atomic Structure Data
Doukyun KIM1, Chul Hong PARK2*
1Department of Physics, Pusan National University, Pusan 46241, Korea
2Department of Physics Education, Pusan National University, Pusan 46241, Korea
We examined a machine learning method to extract the atom-pair interaction potential energy in materials. The data for the atomic structures and the corresponding total energies were generated by using the ab-initio molecular dynamic simulation, by which the artificial neural network (ANN) was trained to predict the total energies of the materials. Two ANNs were assigned: one to simulate (i) the dependence of the atom-pair interaction energy on the distance between the nearest atoms and the other to simulate (ii) the angular distortion energy. We found that compared to the true energies the total energies of Si could be successfully predicted with an error of about 1 meV/atom for atomic structures generated at 300 K, and that the dependence of the atomic interaction energy on the distance and the angular distortion energy could be obtained by training an ANN for atomic structures of various volumes.
New Phys.: Sae Mulli 2020; 70: 398-404
New Phys.: Sae Mulli 2020; 70: 398~523
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Research Papers
Calculation Method of Total Energy and Atomic Interaction Potential Through Machine Learing Using a Neural Network of Atomic Structure Data
Doukyun KIM, Chul Hong PARK*
New Phys.: Sae Mulli 2020; 70: 398-404  https://doi.org/10.3938/NPSM.70.398
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Magnetic Resonance Study of $^{7}$Li and $^{39}$K Nuclei in Li$_{3}$K(SO$_{4}$)$_{2}$ Single Crystals
Tae Ho YEOM*
New Phys.: Sae Mulli 2020; 70: 405-411  https://doi.org/10.3938/NPSM.70.405
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Reduction Effect on the Optical Properties of the Eu$^{2+}$ Doped Sr$_{3}$Al$_{2}$O$_{5}$Cl$_{2}$
Purevdulam NAMKHAI, Kiwan JANG*
New Phys.: Sae Mulli 2020; 70: 412-418  https://doi.org/10.3938/NPSM.70.412
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Activated-Carbon-Supported Molybdenum Disulfide for the Enhanced Hydrogen Evolution Reaction
Theophile NIYITANGA, Hae Kyung JEONG*
New Phys.: Sae Mulli 2020; 70: 419-423  https://doi.org/10.3938/NPSM.70.419
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Evaluation of $\alpha$-decay Half-life for Measuring Concentration of Radioactive Nuclei
Nguyen Ngoc DUY*, Phuong-Thao HO
New Phys.: Sae Mulli 2020; 70: 424-431  https://doi.org/10.3938/NPSM.70.424
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Comparative Analysis of the Contents of and the Inquiries in the Electromagnetic unit of high School Physics Textbooks
Seyeon LEE, Bongwoo LEE*
New Phys.: Sae Mulli 2020; 70: 432-442  https://doi.org/10.3938/NPSM.70.432
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Distribution of high School Students’ Conceptional Understanding About Quantum Phenomena
Sungmin IM*
New Phys.: Sae Mulli 2020; 70: 443-453  https://doi.org/10.3938/NPSM.70.443
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Development of Process-oriented Inquiry-Based Science Performance Assessment Method and Application to Science Gifted High School Students
Minchul KIM, Sangwoo HA*
New Phys.: Sae Mulli 2020; 70: 454-465  https://doi.org/10.3938/NPSM.70.454
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Factors Triggering Thought Experiments in Small Group Physics Problem-solving Activities
Hartono BANCONG, Jinwoong SONG*
New Phys.: Sae Mulli 2020; 70: 466-480  https://doi.org/10.3938/NPSM.70.466
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Methods and Difficulties in the Use of Analogy in Teaching Electric Circuit by Middle School Science Teachers
Ohdam KWON, Chaeyeon SHIN, Jinwoong SONG*
New Phys.: Sae Mulli 2020; 70: 481-492  https://doi.org/10.3938/NPSM.70.481
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Analysis of Articles Related to Quantum Mechanics by Using Topic Modeling: Focus on Comparing LDA, CTM, STM Models
Hyunguk KIM,Jinwoong SONG*
New Phys.: Sae Mulli 2020; 70: 493-502  https://doi.org/10.3938/NPSM.70.493
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Construction of a Michelson-Type Wavemeter and Evaluation of Its Performances
Hyeon Gi CHOI*, Tae Dong LEE
New Phys.: Sae Mulli 2020; 70: 503-509  https://doi.org/10.3938/NPSM.70.503
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Vacuum Feedthrough for a UV Region Cathodoluminescence Experiment with an Optical Fiber
Sang-Min PARK, Sayong HONG*, Jae-Uk JEONG
New Phys.: Sae Mulli 2020; 70: 510-514  https://doi.org/10.3938/NPSM.70.510
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Output Characteristics of Nd:YVO$_{4}$ Laser Pumped by 808 nm and 888 nm Laser Diode
Jin Hyuck CHOI, Han Tae CHOO, Gyu Ug KIM*
New Phys.: Sae Mulli 2020; 70: 515-523  https://doi.org/10.3938/NPSM.70.515
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