• 한국수산과학회지
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• 제47권2호
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• pp.168-173
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• 2014

The effect of critical minimum depth in the coastal region on storm surges was examined using a three-dimensional primitive equation model (POM). Case studies using numerical experiments in a small coastal bay in the southern sea of Korea (Hanam Bay) have examined the 'critical depth' (CD) that stabilizes the numerical calculations. Dependence of the CD of typhoon tracks and tidal components such as M2, S2, O1, and K1 were examined. The model results clearly demonstrated that the numerically unstable state of the calculation was caused by the coarse resolution of sea surface elevation.

• 한국초전도저온공학회:학술대회논문집
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• 한국초전도저온공학회 2000년도 KIASC Conference 2000 / 2000년도 학술대회 논문집
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• pp.166-169
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• 2000

Usually, the critical current of jointed BSCCO tapes degrades quite a bit compared to the normal unjointed tape regions. It has been thought that the current redistribution around the jointed region is the main cause it. We experimentally found the linear voltage components around the jointed area, especially in the transition region, which suggests that the current redistribution around the jointed area is the main reason of the critical current degradations.

• Annals of Clinical Neurophysiology
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• 제4권2호
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• pp.91-97
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• 2002

The field of critical care medicine has flourished, but an unfortunate result of improved patient survival in the intensive care unit is the occurrence of certain acquired neuromuscular disorders. During the last two decades, various neuromuscular disorders were recognized as common causes of weakness occurring in critically ill patients. The two most common disorders are an acute quadriplegic myopathy predominantly associated with the use of intravenous corticosteroids and neuromuscular junction blocking agents and severe systemic illness termed critical illness myopathy(CIM), and an axonal sensorimotor polyneuropathy termed critical illness polyneuropathy. I will review briefly about general components of the CIM.

• 한국화재소방학회논문지
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• 제33권4호
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• pp.70-76
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• 2019

본 연구에서는 임계온도스위치를 이용하여 저전력 단독경보형 정온식 감지기를 개발하였다. 임계온도스위치는 70 ℃에서 저항이 급격하게 감소하는 특성을 나타내는 소자로, 금속-절연체 전이 현상을 이용함으로써 온도 측정에 대한 높은 신뢰성을 보장한다. 또한 임계온도스위치의 금속에서 절연체로 변하는 디지털적인 특성을 이용하여 마이크로컨트롤러 사용 없이 화재를 감지함으로써 단독경보형 정온식 감지기의 소비 전력을 최소화하였다. 시험결과 임계온도스위치를 이용한 단독경보형 정온식 감지기는 소방청 고시 단독경보형 정온식 감지기 시험 조건을 만족했으며, 소비 전력을 측정한 결과 기존 제품 대비 70%의 전력만으로 화재를 감지함을 확인하였다.

• 한국초전도ㆍ저온공학회논문지
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• 제8권2호
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• pp.11-16
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• 2006

Critical current densities were measured for a bicrystalline $(Sm_{0.8}Dy_{0.2})Ba_2Cu_3O_7$ film under various magnetic fields $({^{\rightarrow_{H}}}_a)$. The fields were varied from -0.7KOe to +0.7KOe for various orientations with respect to the film surface. The curves of the critical current densities $(J_{cb})\;vs\;{^{\rightarrow_{H}}}_a$ showed the well known butterfly-like hysteretic curves. Our data could be analyzed for the two components of field, which are normal and parallel to the film surface, respectively. We combined the effect of $H_\perp$ deduced from the data for the normal field $(\theta=90^{\circ})$ and the effect of $H_\parallel$ deduced from the data for the almost parallel field $(\theta=2^{\circ})$. Our analyses indicate that $(J_{cb})$ depends on the two components of flux density at the grain boundary. All the experimental data for various ${\theta}s$ fit well to this new formula which was obtained by multiplying the factors deduced from the field dependences of these two components.

• Progress in Superconductivity
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• 제5권2호
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• pp.128-131
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• 2004

The resistive superconducting fault current limiters (SFCLs) are very attractive devices for the electric power network. But they have some serious problems when the YBCO thin films were used for the current limiting materials due to the in homogeneities caused by manufacturing process. When the YBCO films have some inhomogeneities, simultaneous quenches are difficult to achieve when the fault current limiting units are connected in series for increasing operating voltage ratings. Magnetic field application is one of the prospective way of inducing simultaneous quenches far the series-connected resistive FCL components. Magnetic field was typically generated by the fault current thorough a coil, which is connected to components of the fault current limiter in series, leaving the problem, which provides significant inductance to the power line and suppresses critical current density of the superconducting components. In this article we investigated the possible application of the protective current transformer (p-CT), which is available current source to the magnetic coil. This system inductively coupled to the circuit, therefore, remarkably reducing impedance to the circuit. The current by the protective current transformer was directly fed to the coil, generating magnetic field large enough to reduce critical current density of the components. This successfully induced simultaneous quenches of the series-connected resistive FCL components.

• Journal of Multimedia Information System
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• 제2권2호
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• pp.241-248
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• 2015

The safety-critical software in healthcare systems needs more and more perceptive excess among human observation and computer support. It is a challenging conversion that we are fronting in confirming security in healthcare systems. Held in the center are the patients-the most important receivers of care. Patient injuries and fatalities connected to health information technologies commonly show up in the news, contrasted with tales of how health experts are being provided financial motivation to approve the products that may be generating damage. Those events are unbelievable and terrifying, however they emphasize on a crucial issue and understanding that we have to be more careful for the safety and protection of our patients.

• 대한임베디드공학회논문지
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• 제13권4호
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• pp.205-214
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• 2018

The reliability test is a crucial step for ensuring robustness of high-cost and complex weapon systems. In this paper, we present a set of quantitative criteria to select critical parts or components in weapon systems for the reliability test, and implement a fuzzy inference system by applying developed criteria to fuzzy theory. We classify the selection criteria of critical parts or components into four fuzzy sets and membership functions. A fuzzy inference rule is proposed based on the AHP (Analytic Hierarchy Process) analysis technique so as to derive a convincing reliability test. The credibility of the fuzzy inference system is confirmed through a case study using actual equipment data exacted from an existent weapon system.

• Perspectives in Nursing Science
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• 제1권1호
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• pp.50-65
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• 2004

Despite the new wave of diverse philosophical thoughts in nursing, the criteria for theory evaluation rarely incorporate the new thoughts in its realm. Especially, feminist thoughts, which have contributed to the development of nursing knowledge through incorporating diversities and complexities of nursing phenomenon and reflecting social, cultural, and historical contexts surrounding nursing encounters, were rarely incorporated into the evaluation criteria. In this paper, a feminist approach to theory evaluation is proposed based on a critical analysis of the existing evaluation criteria. First, a historical review of feminist thoughts is provided, and feminist principles across diverse groups of thinking within feminism are discussed. Then, theory evaluation criteria are historically analyzed and critiqued while considering the feminist principles. The critical points found in the currently available theory evaluation criteria include: (a) the evaluation criteria are based on objectivity, (b) they are ignoring gender differences; (c) cultural differences tend not to be seriously considered; and (d) contexts surrounding nursing phenomenon are rarely considered. Based on the critical points, four additional components for theory evaluation are proposed. The components are: (a) respect for subjectivity; (b) historical and sociopolitical contextual considerations; (c) gender sensitivity; (d) cultural competence; and (e) blueprint for action.

• 한국군사과학기술학회지
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• 제13권1호
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• pp.50-56
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• 2010

Military technology transition is the process of transition from the science and technology environment to systems to supply effective weapon systems and support systems to the fighters. In case of technology transition decision, immatured technologies result in increasing acquisition cost and delaying schedule toward the objective system. In this paper, we proposed a method to identify and select critical technology elements by integration relations between technologies or components, for supporting technology transition and risk management of military R&D projects.