• 한국운동역학회지
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• 제23권2호
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• pp.109-116
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• 2013

The purpose of this study was to provide fundamental information for the enhancement of performance through kinematic analysis of cornering according to the radius of curve course in short track speed skating. To perform this study, six skaters: three narrow radius players(N, body mass: $56.0{\pm}7.2$ kg, height: $163.7{\pm}5.1$ cm, age: $21.3{\pm}1.5$ yrs) and three wide radius players(W, body mass: $61.0{\pm}9.5$ kg, height: $169.0{\pm}4.4$ cm, age: $20.0{\pm}1.7$ yrs). Three-dimensional motion analysis was performed on the section from the forth block starting to show the change of radius to the sixth block using eight infrared cameras(sampling frequency of 100 Hz for N and W players). The time of push-off was greater for N than for W(p<.05) while the radius of center of mass was greater for W than for N(p<.05). The flexion and extension of knee and hip joint were greater for N than for W(p<.05). The external rotation of left knee joint was greater for N than for W(p<.05). Based on the findings, a small radius by increasing the range of the flexion and extension of knee and hip joint with greater external rotation of left knee joint would be related to more efficient run at curve. It is expected that these results will be useful in developing a training program for enhancing performance of short track speed skating athletes.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1993년도 한국자동제어학술회의논문집(국제학술편); Seoul National University, Seoul; 20-22 Oct. 1993
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• pp.456-461
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• 1993

In this paper, a new guidance law for a short-range air-to-air missile with constant thrust is presented. It is essentially based on the concept of proportional navigation. First, the theoretical guidance law is derived. Then, we show the technique for practical implementation of the guidance law. By a computer simulation, it is shown that the new guidance law gives better performance than the conventional proportional navigation.

• 전자통신동향분석
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• 제14권6호통권60호
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• pp.162-171
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• 1999

국가적인 지능형 교통시스템(Intelligent Transport System: ITS) 체계에 있어서 단거리전용통신(Dedicated Short Range Communication: DSRC)은 중요한 부분이다. DSRC의 응용부분은 여러분야에 걸쳐 있으며 본 고에서는 자동통행요금징수(Electronic Toll Collection: ETC)의 표준화 동향에 대하여 기술하고자 한다. 그러나 많은 상반되는 자동통행요금징수의 개발로 인하여 에어 인터페이스의 표준화가 어려움에 있다. 본 고에서는 미국 교통부의 지원하에 IEEE(Institute of Electrical and Electronics Engineers)와 ASTM (American Society of Testing and Materials)에 의해 개발되어진 ETC 시스템의 에어 인터페이스 표준들의 현황에 대하여 기술하고 국내의 ETC 시스템의 에어 인터페이스 표준화 동향에 대하여도 기술하고자 한다.

• Journal of information and communication convergence engineering
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• 제5권4호
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• pp.324-327
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• 2007

In this paper, the p-n junction depth with nondestructive method by using scanning electron microscopy (SEM) is determined and conformed. By measuring the critical short circuit current on the p-n junction which induced by electron beam and calculating generation range, the diffusion depth can be obtained. It can be seen that values destructively measured by constant angle lapping and nondestructively by this study almost concur. As this result, it is purposed that diffusion depth of p-n junction can be easily measured by nondestruction. This nondestructive method can be recommended highly to the industrial analysis.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2008년도 하계종합학술대회
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• pp.215-216
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• 2008

Ultra wideband (UWB) system is one of the promising solutions for future short-range communication which has recently received a great attention by many researchers. In this paper, we proposed 128-point low power FFT structure based on the memory for UWB systems. The proposed structure can improve implementation area and power consumption efficiency as it consists of one of the butterfly PE and a little memory.

• 한국ITS학회:학술대회논문집
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• 한국ITS학회 2004년도 제3회 정기총회 및 추계학술대회
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• pp.246-251
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• 2004

• 천문학회지
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• 제29권spc1호
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• pp.97-98
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• 1996

Variability of active galactic nuclei is now a well-known phenomenon. This remains to be fully explained by a theoretical model of the central engine. Time scales of AGN variability seem to range continuously from hours up to months. The short time scale variability must be related to the phenomena on the event horizon of the black hole, while the long one to those in the accretion disk or surrounding matter. Based on the axisymmetric, nonstationary model of the central engine, we discuss theoretical considerations on the variability of active galactic nucleus.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2003년도 추계종합학술대회
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• pp.876-879
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• 2003

Bluetooth is the wireless solution which lay emphasis on Short Range, Low Power, Low Cost using a 2.4GHz frequency hopping. And the wireless interface of digital machinery and the various application studies, which are based on that, is making progress lively. This paper provides "Ethernet Connection for Bluetooth Piconet". Ethernet Connection is usually used in our life and can make the Connection of Internet for Bluetooth Piconet. Therefore, this system forms the basis of "Home or Office Remote Control System".

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2001년도 추계학술대회 논문집
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• pp.73-74
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• 2001

도시지역의 오존농도는 배출원 환경 및 지형과 국지 기상조건에 의해 크게 영향을 받게 된다. 일반적으로 도시내 공단과 교통량이 많은 지역에서는 다량의 NO 배출에 의한 오존의 감소가 일어나는 반면 도시플륨의 풍하측의 지역에서는 오존의 축적과 함께 고농가 발생하게 된다 (Wang et al., 2001; Bower et al., 1994; Mckendry). 특히 연안도시의 경우 여름철 주로 발생하는 국지순환인 해풍에 의한 고농도를 경험하게 되는데, 이는 수면의 낮은 오존침적으로 인해 소멸의 영향이 적고 (Entwistle, 1997), 해풍역전으로 인한 연직혼합의 제한으로 인해 발생한다고 볼 수 있다 (Lu and Turco, 1994). (중략)

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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• pp.317-320
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• 2005

We report experimental and simulation results of L0 state using inner retarder film compared with normal retardation film. In short wavelength range, the reflectance of inner retardation film is three times compared with that of normal retardation film. This results in blue color of L0 state, as retardation decreases or polar angle increases, the color shifts toward purple, finally yellow color, as expected in the simulation results.