• 한국자기학회:학술대회 개요집
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• 한국자기학회 2008년도 Asian Magnetics Conference
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• pp.214.1-214.1
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• 2008

• 대한한의학원전학회지
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• 제32권4호
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• pp.91-107
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• 2019

Objectives : The purpose of this paper is to study how medical experts understood 'Specially Selecting Yangming' for clinical application. Methods : After collecting medical texts related to 'Specially Selecting Yangming', its meaning and clinical application were examined thoroughly. Results : 1. The meaning of 'Specially Selecting Yangming' was identified in different ways according to the meaning of 'Yangming.' It was perceived as Stomach, Yangming meridian, Stomach meridian of Foot Yangming, Spleen and Stomach, Intestine and Stomach by medical experts. 2. Chen Wu-ze and Liu Wan-su understood Wei disease as a form of consumption, and regarded 'Specially Selecting Yangming' as tonifying Yangming while Zhang Zi-he put emphasis on Communicating Stomach Qi(胃氣) through vomiting or purgation. Sun Yi-kui insisted on applying it as a precaution. 3. Li Dong-yuan emphasized the cause of Wei disease to be Damp-Heat in the Summer and suggested Qingshuyiqitang and Qingzaotang as remedy. 4. Zhu Zhen-heng's Purging the South and Reinforcing the North is a more fundamental way of treating Wei disease by stimulating the Water-Fire Axis. Conclusions : Through a diachronic study of 'Specially Selecting Yangming' and its remedy, most medical experts regarded 'Specially Selecting Yangming' as tonifying Yangming, but tonifying Liver and Kidney was thought to be a more fundamental treatment.

• Journal of Microbiology and Biotechnology
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• 제29권9호
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• pp.1470-1477
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• 2019

${\beta}_2$-adrenergic receptor (${\beta}_2-AR$) was expressed efficiently using Bac-to-Bac Baculovirus Expression System in Sf9 cells as a bio-recognition element for multianalyte screening of ${\beta}$-agonist residues in pork. Sf9 cells were selected as the expression system, and codon optimization of wild-type nucleic acid sequence and time-dependent screening of expression conditions were then carried out for enhancing expression level and biological activity. Under optimum conditions of multiplicity of infection (MOI) = 5 and 48 h post transfection, the protein yield was up to 1.23 mg/ml. After purification by chromatographic techniques, the purified recombinant protein was applied to develop a direct competitive enzyme-linked receptor assay (ELRA) and the efficiency and reliability of the assay was determined. The IC50 values of clenbuterol, salbutamol, and ractopamine were 28.36, 50.70, and $59.57{\mu}g/l$, and clenbuterol showed 47.61% and 55.94% cross-reactivities with ractopamine and salbutamol, respectively. The limit of detection (LOD) was $3.2{\mu}g/l$ and the relevant recoveries in pork samples were in the range of 73.0-91.2%, 69.4-84.6%, and 63.7-80.2%, respectively. The results showed that it had better performance compared with other present nonradioactive receptorbased assays, indicating that the genetically modified ${\beta}_2-AR$ would have great application potential in detection of ${\beta}$-agonist residues.

• 대한수학회보
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• 제48권5호
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• pp.1047-1061
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• 2011

In this paper, a class of second-order boundary value problems with Sturm-Liouville boundary conditions or multi-point conditions is considered. Some existence and uniqueness theorems of positive solutions of the problem are obtained by using monotone iterative technique, the iterative sequences yielding approximate solutions are also given. The results are illustrated with an example.

• 로봇학회논문지
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• 제6권4호
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• pp.334-343
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• 2011

This paper presents a new approach for mobile robot heading detection using MEMS Gyro north finding method in the indoor environment. Based on this, the robot heading angle measurement scheme is proposed; improved north finding theory and algorithm are also explained. Several approaches are applied to confirm system's precision and effectiveness. In order to find out the heading angle, a single axis MEMS gyroscope to sense the angle between the robot heading direction and the north is used. To reach enough estimation accuracy and reduce detection time, the least square method (LSM) for the signal fitting and parameter estimation is applied. Through a turn-table, we setup a carouseling system to decrease the substantial bias effect on gyroscope's heading angle. For the evaluation of the proposed method, this system is implemented to the Pioneer robot platform. The performance and heading error are analyzed after the test. From the simulation and experimental results, system's accuracy, usefulness and adaptability are shown.

• Current Optics and Photonics
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• 제8권3호
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• pp.246-258
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• 2024

In aerospace and energy engineering, the reconstruction of three-dimensional (3D) temperature distributions is crucial. Traditional methods like algebraic iterative reconstruction and filtered back-projection depend on voxel division for resolution. Our algorithm, blending deep learning with computer graphics rendering, converts 2D projections into light rays for uniform sampling, using a fully connected neural network to depict the 3D temperature field. Although effective in capturing internal details, it demands multiple cameras for varied angle projections, increasing cost and computational needs. We assess the impact of camera number on reconstruction accuracy and efficiency, conducting butane-flame simulations with different camera setups (6 to 18 cameras). The results show improved accuracy with more cameras, with 12 cameras achieving optimal computational efficiency (1.263) and low error rates. Verification experiments with 9, 12, and 15 cameras, using thermocouples, confirm that the 12-camera setup as the best, balancing efficiency and accuracy. This offers a feasible, cost-effective solution for real-world applications like engine testing and environmental monitoring, improving accuracy and resource management in temperature measurement.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.147-149
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• 2003

The wetness, a function of precipitation and temperature etc, and the warmth, a function of temperature, are the dominant factor for global vegetation distribution. This paper employs the normalized difference vegetation index (NDVI), warmth index (WAI), and wetness index (WEI), and focuses on an essential climate-vegetation relationship at global scale. The NDVI was acquired from ‘Twenty-year global 4-minute AVHRR NDVI dataset.’ The WEI is defined as the fraction of the precipitation to the potential evaporation. The WAI was calculated by accumulating the monthly mean temperature of the portion exceeded 5$^{\circ}C$ throughout the year. Meteorological data for the WEI and WAI calculation were obtained from the ISLSCP CD-ROM. All analyses were conducted for 1 ${\times}$ 1 degree grid box on the terrestrial area of the Earth, and on annual value basis averaged in 1987 and 1988. The result of analyses demonstrated that there are two regimes in their relations, that is, a regime in which NDVIs vary depending on the WEI, and a regime in which NDVIs vary depending on the WAI. These two regimes appeared to correspond to the wetness dominant and warmth dominant vegetation, respectively. The geographical distributions of two regimes were mapped. Most of the world vegetation is categorized into wetness dominant, while warmth dominant vegetation is seen in the high-latitude area mainly to the north of 60$^{\circ}$N in the Northern Hemisphere and high-altitude areas.

• Journal of Electrical Engineering and Technology
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• 제11권5호
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• pp.1116-1127
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• 2016

• Journal of Power Electronics
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• 제18권3호
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• pp.892-901
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• 2018

SiC MOSFETs have been used to improve system efficiency in high frequency converters due to their extremely high switching speed. However, this can result in undesirable parasitic oscillations in practical systems. In this paper, models of the key components are introduced first. Then, theoretical formulas are derived to calculate the switching oscillation frequencies after full turn-on and turn-off in clamped inductive circuits. Analysis indicates that the turn-on oscillation frequency depends on the power loop parasitic inductance and parasitic capacitances of the freewheeling diode and load inductor. On the other hand, the turn-off oscillation frequency is found to be determined by the output parasitic capacitance of the SiC MOSFET and power loop parasitic inductance. Moreover, the shifting regularity of the turn-off maximum peak voltage with a varying switching speed is investigated on the basis of time domain simulation. The distortion of the turn-on current is theoretically analyzed. Finally, experimental results verifying the above calculations and analyses are presented.

• 비교문화연구
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• 제48권
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• pp.67-106
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• 2017

이 논문은 중국에서 중국어로 집필된 한국문학사 가운데 조선족 학자인 이암(李岩)(외)의 "조선문학통사"(2010)와 한족 학자인 위욱승(韋旭昇)의 "조선문학사"(1988, 2008)의 서술시각을 남북한문학사와 비교하여 그 특징을 밝히고자 하였다. 주요 검토 결과는 다음과 같다. 첫째, 조동일의 "한국문학통사"와 북한 15권본에서는 시대구분 방식, 장르의 개념, 개별 작품에 대해 논의를 세밀하게 전개하면서 이를 문학사 서술에서 적극 활용한 바 있다. 그러나 위욱승(韋旭昇)과 이암(李岩)의 한국문학사에서는 남북한의 이러한 이론적 논의 과정에 거의 주목하지 않았다. 이암(李岩)의 "조선문학통사"는 2010년에 출간되었고, 위욱승(韋旭昇)의 "조선문학사"는 1986년 초판을, 2000년과 2008년에 개정판을 출간했다. 두 문학사의 출간 시점으로 보면, 한국쪽에서 이루어진 여러 논의들을 참조하는 것이 당연한 일일 터인데 그렇지 못하다. 자국문학사의 서술 전통에 더 많은 영향을 받았기 때문이라 생각된다. 둘째, 두 텍스트는 정치 사회 경제 문화 등 문학 외부적 요인을 중시하며 각 시대마다 '개술'에서 이를 따로 언급하고 있고, 본문에서도 인민성 현실성 민족성 등 '정치 표준'에 의거한 평가가 중시된다. 이는 사회주의 체제에서의 문학사 서술에서 자주 쓰이는 방식이며, 북한 15권본도 비슷한 형식을 보인다. 셋째, 두 문학사는 중국학자가 쓴 한국문학사이기 때문에 중국문학과 한국문학의 연관성에 주목하는 부분이 많다. 하지만 소품(小品) 낙부(樂府) 우언(寓言) 설창(說唱) 사전(史傳) 등 장르 용어는 중국문학 용어를 많이 활용하였다. 그러나 중국에서 사용되는 이러한 장르 용어로 한국문학을 설명할 때, 본래의 의미와 변화된 의미 사이의 차이를 세밀하게 검토하지 않은 경우가 많았다. 향후 작업에서 반드시 고려되어야 할 점이라 생각한다.