• The Korean Nurse
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• v.19 no.5 s.108
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• pp.50-53
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• 1980

A new patient classification system, SLC System was introduced. It has been implemented in the Friendship Village Extended Care Facility in St. Louis, Missouri, USA, and it has shown that the system not only simplified the job but also increased the job e

• Computers and Concrete
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• v.5 no.3
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• pp.217-241
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• 2008

In this paper, a total strain-based hysteretic material model based on MCFT is proposed for non-linear finite element analysis of reinforced concrete structures. Although many concrete models have been proposed for simulating behavior of structures under cyclic loading conditions, accurate simulations remain challenging due to uncertainties in materials, pitfalls of crude assumptions of existing models, and limited understanding of failure mechanisms. The proposed model is equipped with a fully generalized hysteresis rule and is formulated for 2D plane stress non-linear finite element analysis. The proposed model has been formulated in a tangent stiffness-based finite element scheme so that it can be used for most general finite element analysis packages. Moreover, it eliminates the need to check that tensile stresses can be transmitted across a crack. The tension stiffening model is a function of the bar orientation and any orientation can be accommodated. The proposed model has been verified with a series of experimental results of 2D RC planar panels. This study also demonstrates how parameters of the proposed model associated with cyclic damage modeling influences the pinched cyclic shear behavior.

• Structural Engineering and Mechanics
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• v.32 no.6
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• pp.787-809
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• 2009

Recent interest in the use of wireless sensor networks for structural health monitoring (SHM) is mainly due to their low implementation costs and potential to measure the responses of a structure at unprecedented spatial resolution. Approaches capable of detecting damage using distributed processing must be developed in parallel with this technology to significantly reduce the power consumption and communication bandwidth requirements of the sensor platforms. In this investigation, a damage detection system based on a distributed processing approach is proposed and experimentally validated using a wireless sensor network deployed on two laboratory structures. In this distributed approach, on-board processing capabilities of the wireless sensor are exploited to significantly reduce the communication load and power consumption. The Damage Location Assurance Criterion (DLAC) is used for localizing damage. Processing of the raw data is conducted at the sensor level, and a reduced data set is transmitted to the base station for decision-making. The results indicate that this distributed implementation can be used to successfully detect and localize regions of damage in a structure. To further support the experimental results obtained, the capabilities of the proposed system were tested through a series of numerical simulations with an expanded set of damage scenarios.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2007.10a
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• pp.418-419
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• 2007

• Journal of Korean Society for Atmospheric Environment
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• v.25 no.2
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• pp.154-166
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• 2009

In this study, 1-hour integrated $PM_{2.5}$ mass and chemical composition concentrations were monitored at the St. Louis-Midwest Supersite in Illinois. Time-resolved samples were collected one week in each of June 2001 (22 June to 28 June), November 2001 (7 November to 13 November), and March 2002 (19 March to 25 March). A total of 427 samples were collected by CAMM (continuous ambient mass monitor) and 15 compounds were analyzed by AAS, PILS (particle-into-liquid sampler), and TOT (thermal optical transmittance) method. PMF was applied to identify the sources and apportion the $PM_{2.5}$ mass to each source for highly time resolved data. In addition, the nonparametric regression (NPR) was applied to identify the predominant directions of local sources relative to wind direction. Also, this study performed compare the NPR analysis and location of actual local point sources at the St. Louis area. The PMF modeling identified nine sources and the average mass was apportioned to gasoline vehicle, road dust, zinc smelter, copper production, secondary sulfate, diesel emission, secondary nitrate, iron+steel, and lead smelter, respectively. These results suggested that this study results will be help for $PM_{2.5}$ source apportionment studies at similar metropolitan area, establish $PM_{2.5}$ standard, and establish effective emissions reduction strategies in Korea.

• Journal of Chest Surgery
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• v.45 no.5
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• pp.275-286
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• 2012

The saphenous vein has been the principal conduit for coronary bypass grafting from the beginning, circa 1970. This report briefly traces this history and concomitantly presents one surgeons experience and personal views on use of the vein graft. As such it is not exhaustive but meant to be practical with a modest number of references. The focus is that of providing guidance and perspective which may be at variance with that of others and recognizing that there may be many ways to accomplish the task at hand. Hopefully the surgeon in training/early career may find this instructive on the journey to surgical maturity.

• Bulletin of the Korean Mathematical Society
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• v.52 no.4
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• pp.1321-1325
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• 2015

In this paper we study the semicontinuity of the automorphism groups of domains in multi-dimensional complex space. We give examples to show that known results are sharp (in terms of the required boundary smoothness).

• Bulletin of the Korean Mathematical Society
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• v.53 no.4
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• pp.1043-1049
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• 2016

In this paper we study questions about automorphism groups of domains in ${\mathbb{C}}^n$, formulating the ideas entirely in terms of metric geometry. We also provide some applications.

• Journal of The Korean Society of Inherited Metabolic disease
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• v.1 no.1
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• pp.28-29
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• 2001

• KDI Journal of Economic Policy
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• v.10 no.1
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• pp.19-35
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• 1988

1968년 St. Louis모형(模型)의 주축(主軸)을 이루는 총지출식(總支出式)이 발표된 이래 이를 둘러싸고 경제학자(經濟學者)들간에 많은 논란(論難)이 계속되어 왔다. 본고(本稿)는 이 시점(時點)에서 과거(過去)의 경험(經驗)과 쟁점(爭點)들을 회고해 보면서 종합적(綜合的)인 평가(評價)를 시도함과 아울러 동(同) 모형(模型)을 우리 경제(經濟)에 적용(適用)하여 통화정책(通貨政策)의 파급효과(波及效果)를 측정해 보고 이에 대한 정책적(政策的) 함의(含意)를 추출해 보고자 함을 그 목적으로 하고 있다. 본(本) 연구(硏究)의 분석결과(分析結果)에 의하면 우리나라에 있어서도 통화정책(通貨政策)의 명목소득(名目所得)에 대한 파급효과(波及效果)가 재정정책(財政政策)의 경우보다 월등하나 미국(美國)의 경우에 비하여는 명목소득(名目所得)과 물가(物價)의 통화(通貨)에 대한 탄성치(彈性値)가 다소 작은 것으로 나타났다. 따라서 경제(經濟)의 안정화(安定化)(특히 장기(長期))를 위해서는 통화정책(通貨政策)에 큰 비중(比重)을 두어야 한다는 점이 시사되고 있다. 다만 이 모형(模型)은 총통화(總通貨)의 외생성(外生性) 여부, 모형(模型)의 구조적(構造的) 안정성(安定性), 금융혁신(金融革新) 등에 따른 총통화유통속도(總通貨流通速度)의 불안정 가능성 등의 문제점을 안고 있으므로 동(同) 결과(結果)의 해석이나 활용에 있어서는 주의를 요한다고 하겠다.