경영교육, 나눔경영을 위한 ‘기부’를 생각해보다!: Q방법론을 활용하여

유영설(Yu, Young-Seol),이도희(Lee, Doh-Hee) 한국경영교육학회 2021 경영교육연구 Vol.36 No.3

이상설 : 한국 근대수학교육의 아버지

설한국,이상구,Seol, Han-Guk,Lee, Sang-Gu 한국수학사학회 2009 Journal for history of mathematics Vol.22 No.3

본 논문은 한국수학사에서 연구와 정리가 취약한 시기인 근대수학의 도입기를 조사하면서, 그 근대수학의 도입기에서 만나게 되는 인물인 이상설(李相卨)에 대한 조명을 시도한다. 시대적 상황이 모든 분야의 침체기를 가져온 구한말 이상설은 근대수학에서 당대를 대표하는 높은 학식을 쌓고 뛰어난 재능을 보여주었다. 그간 이상설에 대해 '근대수학교육의 아버지'라는 평가가 없지 않았음에도 불구하고 낯설게 느껴진다면, 그것은 그가 독립운동가로만 강하게 각인된 탓일 것이다. 하지만 그는 19세기말 조선 근대수학의 첫 번째 교과서 편저자이자 수학교사이기도 했음을 새겨둘 필요가 있다. 대유학자이면서도 선구적으로 외국어와 서양과학 특히 근대 서양수학을 이해한 면모는 한국이 배출한 천재 중 하나라는 평가가 결코 과장이 아님을 보여준다. 이에 본 논문에서는 한국 근대수학교육에 커다란 기여를 한 인물인 이상설의 교육과 학문 및 실천업적을 조명한다. 보재 이상설이 1886년경에 쓴 책 <수리>와 최초로 수학과 과학을 관립교육기관의 교육과정에 편성한 과정, 최초의 근대수학교과서로 여겨지는 <산술신서>의 발간, 민족교육기관인 '서전서숙'의 설립 및 운영을 포함한 보재의 업적을 한국수학사 관점에서 조명한다. 또한 <산술신서>의 목차와 구체적인 내용 및 1901년에 출간된 <신정산술>의 내용을 소개하고, 지금까지 부정확하게 알려진 <수리>와 <산술신서>에 관한 몇 가지 역사적 사실을 발굴하여 재조명한다. Most who have heard of Sang-Seol Lee know him for his contribution to the Korean independence movement nearly a hundred years ago. This paper, however, will discuss Lee's other great contribution to his country; that of being "The father of modern mathematical education in Korea". Lee passed the rigorous government officer examination with the highest honor and became a teacher for the royal prince. Later he became the president of Sunkyunkwan, a national institute of higher learning since 1398, and eventually a well-known university bearing the same name. Lee was also a highly regarded Confucian scholar and well versed in foreign languages. He wanted Korea to become a modern country and felt that the areas of science and engineering were studies that needed improving in order to achieve modernization. While researching Western textbooks on the subjects he realized that Western mathematics would be especially important for Korea. With that, it became his mission to integrate Western mathematics into the Korean educational system. This paper will explain the importance of Sang-Seol Lee's contributions to mathematic education in Korea and how it helped Korea become the modern nation it is today.

Design of 3-Times Magnetizer and Rotor of Spoke-Type PMSM Considering Post-Assembly Magnetization

Seol, Hyun-Soo,Jeong, Tae-Chul,Jun, Hyun-Woo,Lee, Ju,Kang, Dong-Woo IEEE 2017 IEEE transactions on magnetics Vol.53 No.11

<P>Unlike the existing bar-type permanent magnets, it is difficult to magnetize the ferrite spoke-type permanent magnet synchronous motor (PMSM), because the permanent magnet is placed deep inside the shaft. In order to magnetize permanent magnet, a high magnetic field intensity is required. However, the high magnetic field intensity may cause demagnetization of surrounding permanent magnets. It has a bad effect on the magnetization of the permanent magnet and the performance of the spoke-type PMSM. In this paper, we proposed magnetizer models for magnetization of spoke-type 10 pole rotor and the inter-pole winding to reduce the demagnetization of surrounding permanent magnets. Finally, the optimally designed model was manufactured and the performance of the magnetizer was verified.</P>

Characteristics of GaN Metal-Insulator-Semiconductor-Insulator-Metal Ultraviolet Photodiodes Using Al₂O₃, HfO₂, and ZrO₂ as Insulators

Seol, Jeong-Hoon,Lee, Gil-Ho,Hahm, Sung-Ho IEEE 2018 IEEE SENSORS JOURNAL Vol.18 No.11

<P>GaN-based metal–insulator–semiconductor–insulator-metal (MISIM) photodiodes using three kinds of high-k dielectrics (Al<SUB>2</SUB>O<SUB>3</SUB>, HfO<SUB>2</SUB>, and ZrO<SUB>2</SUB> were fabricated, and their electrical, photo response, and noise properties were characterized. The GaN MISIM photodiode using ZrO<SUB>2</SUB> showed the lowest dark current density of <TEX>$5.43 \times 10^{-9}$</TEX> A/cm<SUP>2</SUP> at 10 V bias and the highest UV-visible rejection ratio of 257 at 1 V bias. No Fowler-Nordheim tunneling phenomenon was observed in the diode under UV illumination. The noise spectral density and the trap-time-constant of the device using ZrO<SUB>2</SUB> were <TEX>$9.79 \times 10^{-31}~\text{A}^{2}$</TEX>/Hz for <TEX>$f = 10$</TEX> Hz at 1 V and <TEX>$335~\mu \text{s}$</TEX>, respectively, which were lowest compared with the other two samples. ZrO<SUB>2</SUB> was identified as the better GaN, the passivation material among the three dielectrics.</P>

Comparison of the Effect of the Fascial Distortion Model, Foam Rolling and Self-Stretching on the Ankle Dorsiflexion Range of Motion

( Seol Park ),( Ji-young Kim ) 대한물리치료학회 2020 대한물리치료학회지 Vol.32 No.4

Purpose: This study compared the effects of the fascial distortion model (FDM), foam rolling (FR), and self-stretching (SS) on the ankle dorsiflexion range of motion (ROM). Methods: Thirty subjects who had no more than 30° of ankle dorsiflexion ROM at the weight-bearing lunge test were recruited in this study. They were divided into three groups: (FDM, FR, and SS), and underwent each intervention for five minutes. Before and after the intervention, the ankle dorsiflexion ROM in the supine (the open-) and standing (the closed-kinetic chain) of the subjects were tested. The changes in the ROM between pre- and post-intervention and among the groups were analyzed. Results: All groups showed increased ankle dorsiflexion ROM after the intervention in both positions. In the position of the open kinetic chain, the changes in the ROM between pre- and post-intervention had significant differences among the groups, and the FDM was higher than the FR and SS. In the position of the closed kinetic chain, the ROM after the interventions and the changes in the ROM had significant differences among the groups, and FDM was higher than the FR (ROM after the intervention, the change in ROM) and SS (the change in ROM). Conclusion: These findings showed that FDM had more efficiency than the FR and SS as FDM had a stronger effect on increasing ankle dorsiflexion in a short, limited time. Clinicians who have limited time to treat their patients, particularly trying to increase ankle dorsiflexion ROM, should consider the application of FDM.

Selective Ohmic Contact Formation on Schottky Type AlGaN/GaN UV Sensors Using Local Breakdown

Seol, Jeong-Hoon,Hahm, Sung-Ho IEEE 2019 IEEE SENSORS JOURNAL Vol.19 No.8

<P>Local annealing method was developed to change the Ni–AlGaN/GaN and Ni–GaN rectifying contacts into ohmic contacts by using the dielectric breakdown of a sacrificial insulator. The current increased 10<SUP>5</SUP> times in an AlGaN/GaN Schottky diode as a result of the annealing step. An interdigitated Schottky metal–semiconductor–metal ultraviolet (UV) sensor was fabricated using the locally annealed electrodes. The UV to visible rejection ratio of the GaN-based UV sensor was 5.2 at forward bias to 467.9 at a reverse bias of −1 V. Unlike typical annealing methods, the local annealing method will be useful to change the contact property on the probing stage even after finishing the whole fabrication processes.</P>

Current vector control of wireless power transfer system with 2D transmitting coils

Seol, W.,Chung, S. IET 2018 Electronics letters Vol.54 No.2

Enhanced neoclassical particle transport by resonant magnetic perturbations in a tokamak

Seol, J.,Shaing, K. C. American Institute of Physics 2017 Physics of plasmas Vol.24 No.9

Susceptibility of Enteropathogenic Vibrios to Antimicrobial Drugs

Seol, Sung Yong,Cho, Dong Taek,Chun, Doki 中央醫學社 1975 中央醫學 Vol.29 No.3

Nanosculpting of complex oxides by massive ionic transfer

Seol, Daehee,Jesse, Stephen,Park, Sang-Joon,Lee, Woo,Kalinin, Sergei V,Kim, Yunseok IOP 2016 Nanotechnology Vol.27 No.50

<P>Scanning probe microscopy (SPM)-based approaches have been extensively studied as methods to control the structure and properties of materials on the nanoscale. In many cases, the SPM probe is physically utilized to control structure and properties. In addition to physical modulation, it has been reported that voltage can be effectively used to modulate electrochemical phenomena on the sample surface. These studies suggest that electrochemical modulation of the structure and properties is possible by applying a voltage. Herein, in order to demonstrate voltage induced modulation of surface structure, we explored surface nanosculpting by creating electrochemically induced pits on the surface of TiO<SUB>2</SUB> thin films through the application of voltage using the atomic force microscope tip. Using a unipolar negative voltage sweep, pits were successfully generated. Further, the electric potential distribution was simulated to unravel the relationship between the pit volume and the magnitude of the applied voltage. Finally, surface protrusion induced by positive voltage sweep was also observed to elucidate the complete process of electrochemically induced surface modulation. These results can offer fundamental information for understanding how surface structure can be modulated by electrochemical phenomena.</P>