• Electrical & Electronic Materials
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• v.9 no.6
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• pp.584-592
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• 1996

Coupling optical modulator which on the $LiTaO_3$ substrate is fabricated by using proton exchange method and self-aligned method. Proton exchange of proton diffusion method was applied to pattern a waveguide on $LiTaO_3$ substrate. The annealing at >$400^{\circ}C$ was carded out to control waveguide width and depth. The depths of the two annealed optical waveguides, which were measured by using .alpha.-step, were 1.435 K.angs. and 1.380 K.angs. Using .alpha.-step facility, we examined that the width of waveguides is increased from 5.mu.m to 6.45 .mu.m and 6.3.mu.m due to the annealing effects. The process of proton exchange was done at 150.deg. C for 120 min, >$200^{\circ}C$ for 60 min and annealing process was done at >$400^{\circ}C$ for 90 min, >$400^{\circ}C$ for 60 min. The high speed coupling optical modulator has very good figures of merits; the measured high frequency power were achieved.

• Journal of the Korea Concrete Institute
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• v.16 no.2 s.80
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• pp.269-275
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• 2004

Factorial design method is applied to investigate the effects of various factors simultaneously rather than to conduct a series of single-factor experiment. As the results, frost resistance of the concrete specimens, in both W/C ratio of 0.28 and 0.35, was highly affected by the type of coarse aggregate that is, andesite produced more durable concrete than the limestone. Durability factor of the specimens, with W/C ratio of 0.28, which were demolded after I day and transferred to the curing room was higher than those demolded after 2 days. This stated the efficiency of the high early curing in high strength concrete.

• The Journal of Korean Medicine
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• v.22 no.2
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• pp.120-127
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• 2001

Insomnia is a disorder of initiaton and maintenance of sleep that results in daytime sleepiness and dysfunction, and arises from multiple psychological, physiologic and environmental factors. A number of stroke patients suffer from insomnia classified as one of the sleep disorders associated with physical illness and on the contrary insomnia may have profound deleterious effects on the natural course of stroke. We experiened three cases of stroke patients with insomnia. In the point of Differentiation of Syndromes, these subjects were diagnosed as Excessive heat-fire syndrome of stroke and were administrated with Hwangyeonhaedog-tang Gamibang. After treatment, both sleep patterns and other accompanied symptoms improved.

• Proceedings of the Korea Contents Association Conference
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• 2010.05a
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• pp.213-215
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• 2010

본 연구의 목적은 소방대원들의 외상사건 경험이 외상후 스트레스장애 증상, 정서적 탈진, 신체증상, 사회 및 직업기능에 미치는 영향을 파악하기 위해 이들 간의 관계를 설명하는 가설적 모형을 구축하고 검증하므로써 소방공무원의 근무여건 개선 및 외상후 스트레스 관리방안 마련을 위한 기초자료를 제공하고자 하였다. 전국의 소방공무원 2,167명을 대상으로 2008년 1월20일부터 2008년 2월 15일까지 이메일을 통한 설문조사를 실시하였으며, 연구 도구는 일반적 특성 및 근무특성 설문, 외상사건경험 설문, 사건충격척도(IES-R-K), 정서적 탈진척도(MBI), 신체증상 측정도구, 사회 및 직업기능척도(SOFAS)를 사용하였다.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.24 no.11
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• pp.2812-2822
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• 2000

Several methods have been developed to predict the rupture time of the boiler tubes in thermal power plant. However, existing life prediction methods give very conservative value at operating stress of power plant and rupture strain cannot be well estimated. Therefore, in this study, rupture time and strain prediction method accounting for creep, corrosion and heat transfer is newly proposed and compared with the current research results. The creep damage evolves by continuous cavity nucleation and constrained cavity growth. The corrosion damage evolves by steam side and fire side corrosion. The results showed good correlation between the theoretically predicted rupture time and the current research results. And rupture strain may be well estimated by using the proposed method.

• The Korean Journal of Food And Nutrition
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• v.13 no.3
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• pp.281-290
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• 2000

Porridge is one of the oldest recipes from Chinese emperor period, Porridge is made out of many kinds of granis and we concentrate on here ones that are made out of mostly rice, We find out now a day, porridge is fading out because it takes longer time to make one and usually people tends to thinks porridge is only for the patients, We try to figure out more variety of porridge by researching fifteen books. which are dated from sixteen century to 20 century, More specifically we focus on, in our research, recipes, materials that make porridge, materials that put fire on, pots that cook in, tools that handle with, purposes that make it, and effects that bring our after eat it.

• Ocean Systems Engineering
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• v.1 no.2
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• pp.111-119
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• 2011

Mines, torpedoes and improvised explosive devices (IED) pose a serious threat to the survivability of naval combatants. Inasmuch, a major goal in the design of modern combatant ships has been to eliminate or at least reduce the devastating damage caused by underwater explosion events. Even though there has been extensive research performed on the various underwater explosion phenomena and their associated effects, effective shock testing and shock proofing strategies for naval ship systems have proven to be illusive. Through the use of modeling and simulation (M&S), live fire test and evaluation (LFT&E) and laboratory testing, general guidelines for the shock hardening of shipboard equipment and systems have been developed. In this paper, current aspect of ship survivability has been addressed and future direction is discussed.

• Proceedings of the KSR Conference
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• 2007.11a
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• pp.1248-1253
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• 2007

Urban transit or subway stations generally service for a long period of several decades. And, the urban transit or subway is public transportation which lots of people takes every day. During the service time, they are inevitably damaged from environmental corrosion, material aging, fatigue, and the coupling effects with long-term loads and extreme loads. The included damage accumulates and performance degenerates due to the above factors. They would inevitably reduce the resisting capacity of station against the disaster; even they result in collapse with the structural failure under extreme loads. And, if disaster such as earthquake, fire, etc. happens, it causes huge property damage and threatens the human lives. Because of these above reasons, the intelligent health surveillance system should be researched and developed for ensuring the safety of station. In this paper, the research plans of the intelligent health surveillance system of urban transit station are presented. And also, the development or establishment directions of this system are suggested.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.12
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• pp.555-586
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• 1999

United States has extended the extraterritorial application of U.S. Antitrust Law in 1990s. First, The U.S. Federal Supreme Court declared in Hartford Fire Insurance Co. v. California that the extraterritorial application of U.S. Antitrust Law is according to Effect Doctrine. Therefore, U.S. Antirust Division and FTC will continue to base their assertions of juridiction on the test of direct, substantial and foreseeable effects on U.S. interests. Second, U.S. Antitrust Law apply to foreign conduct that such conduct has direct, substantial and reasonably foreseeable effect on U.S. domestic or import commerce and export commerce. Third, United States has extended the extraterritorial application of U.S. Antitrust Law on international licensing contract or international merger. Forth, United States impose criminal responsbility of U.S. Antitrust Law on the foreign anticompetitive conduct. Therefore, our government and industries must consider the corresponding stratigies against the extension of the extraterritorial application of U.S. Antitrust Law.

• Proceedings of the KSME Conference
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• 2000.04b
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• pp.879-885
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• 2000

This study is carried out to make clear the reason of occurrence of sudden acceleration incident of AT vehicle. The stepping motor is used to control the engine speed at idle by compensating the volume of air. By the way it's valve is contaminated by blow-by gas, deposit and back fire etc. This contamination could occur the load of motor at low temperature. This plays an important role in damaging the motor's coil with the motor's performance interfered. If it's coil is damaged the ISC could malfunction. If these phenomena occur, the speed of engine may increase or the engine may stall with hunting.