• 대한약학회:학술대회논문집
• /
• 대한약학회 2001년도 Proceedings of International Convention of the Pharmaceutical Society of Korea
• /
• pp.156.2-157
• /
• 2001

• 한국연소학회지
• /
• 제12권4호
• /
• pp.31-38
• /
• 2007

An numerical study was conducted on superdetonative mode ram accelerator with length extended combustor. The computation condition was based on ISL's RAMAC30 II S225 experiment. For 50% length increased combustor, flame is not sustained. For the case of 60% and 70% increase, flame is successfully sustaind. But detonation wave is oscillating and acceleration is fluctuating. Extention of combustor is helpful for sustaing detonation wave but it may cause unstart.

• 한국연소학회:학술대회논문집
• /
• 한국연소학회 2007년도 제34회 KOSCO SYMPOSIUM 논문집
• /
• pp.126-129
• /
• 2007

An numerical study was conducted on superdetonative mode ram accelerator with extended combustor. The computation case was based on ISL's RAMAC30 II experiment. For 50% length increased combustor, flame is not sustained. For the case of 60% and 70% increase, flame is successfully sustaind. But detonation wave is oscillating and acceleration is fluctuating. Increasing of combustor length is helpful for sustaing detonation wave but it may cause unstart.

• 한국연소학회:학술대회논문집
• /
• 한국연소학회 2005년도 제31회 KOSCO SYMPOSIUM 논문집
• /
• pp.28-31
• /
• 2005

The numerical simulation is conducted for analysis flame structure of superdetonative ram accelerator experiment by ISL(French-German Research Institute in Saint Louis). Fully coupled chemically non-equilibrium Navier-Stokes equation is used. Shockwave structure of superdetonative ram accelerator and behavior of detonation wave is studied. Maintaining of detonation wave is very important to accelerate projectile, Because detonation wave make high pressure gases and this high pressure accelerate projectile.

• International Journal of Control, Automation, and Systems
• /
• 제2권2호
• /
• pp.182-188
• /
• 2004

This paper presents a design method of delay-dependent control for T-S fuzzy systems with time delays. Based on parallel distributed compensation (PDC) and a descriptor model transformation of the system, a delay-dependent control is utilized. An appropriate Lyapunov-Krasovskii functional is chosen for delay-dependent stability analysis. A sufficient condition for delay-dependent control is represented in terms of linear matrix inequalities (LMIs).

• 한국어업기술학회:학술대회논문집
• /
• 한국어업기술학회 2003년도 춘계 수산관련학회 공동학술대회발표요지집
• /
• pp.156-157
• /
• 2003

In teleost, vitellogenin (Vtg) is synthesised in the liver in response to estrogens and transported by the blood to the growing oocytes where it is incorporated by micropincytosis (Selman and Wallace, 1982). Generally, Vtg is not induced in normal male fish but male fish are capable of synthesis Vtg in reponse to exogenous estrogen and xenoestrogens. (omitted)

• 정보저장시스템학회:학술대회논문집
• /
• 정보저장시스템학회 2005년도 추계학술대회 논문집
• /
• pp.38-39
• /
• 2005

A new C-aperture is needed in the Ag film because general metal films don't alternate with the PEC film. In this paper, using FDTD method and the Drude-Lorentz metal model, a new C-aperture is designed in the Ag film and the 40nm-beam size and the $7\%$ near-field transmission efficiency are obtained at 28nm distance from the aperture. Its near-field transmission is about 1000 times larger than that of a 54 nm${\times}$54 nm square aperture.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1981년도 하계 학술회의초록집
• /
• pp.146-153
• /
• 1981

A practical and robust control scheme is suggested for MIMO discrete time processes with real simple poles. This type of control scheme, having the advantages of both the adaptiveness and optimality, may be successfully applicable to structured dynamic controllers for plants whose parameters are slowly time-varying. The identification of the process parameters is under-taken in ARMA form and the optimization of the feedback gain matrix is performed in the state space representation with regard to a standard quadratic criterion.

• 한국안광학회지
• /
• 제12권4호
• /
• pp.107-110
• /
• 2007

농촌지역 50대~80대 남녀 137명을 대상으로 자동 안굴절력계에 의한 원용 교정도수 측정, Trial frame와 Trial lens set을 사용한 근용 도수 측정, 최대조절력의 1/2과 2/3를 사용하였을 때의 유효조절력 산정 등을 통하여 조절력을 분석해 보았다. 그 결과 50대에서는 1.84~2.46D, 60대에서는 1.55~2.06D, 70대에서는 1.43~1.90D, 80대에서는 1.22~1.62D로 조사되어 기존에 알려진 나이에 따른 조절력에 비해 다소 높게 나타났다.

• 한국농림기상학회지
• /
• 제10권3호
• /
• pp.107-112
• /
• 2008

"Jeung-Bo-San-Lim-Gyeong-Je" (meaning "Revised Forest Management") has been well recognized as the informative document that introduces scientific knowledge and experiences of Korean ancestors regarding weather and climate. The tradition of Gwan-Cheon-Mang-Gi(i.e., empirical forecasting of short-term weather phenomena based on the status of cloud or sky) has been continuously utilized as a civilian weather forecasting method and even for very short-term weather prediction by operational forecasters these days. This agricultural technology textbook, published during the Great King Youngjo in Chosun-Dynasty, may be regarded as a poorly written document from the modern standpoint. Nonetheless, this study demonstrates that by and large the empirical knowledge contained in the book is indeed science based although their applications are limited to several hours for local forecasts in agricultural practices and daily living. For example, the wisdom of keeping water at an optimum level in a paddy field after sowing to prevent young seedlings from late frost damages was not at all different from the present technique of vinyl covered seedling nursery.