• Smart Structures and Systems
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• 제6권9호
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• pp.1079-1105
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• 2010

Railway transport of goods and passengers is effective in terms of energy conservation and travel time savings. Safety and ride quality have become important issues as train speeds have increased. Due to increased speeds, minor damage to railway structures and abnormal interactions between trains and structures have given rise to increasingly serious accidents. Therefore, structural health and operational conditions must be monitored continuously in all service environments. Currently, various health and operation management systems are being developed and these are reducing both maintenance frequency and costs associated with disassembly. In this review, major damage and malfunctions and their locations are first analyzed based on numerous references. Then advanced train health and operation management technologies are classified into wayside detection methods and advanced integrated sensor methods and their operating principle and functions are reviewed and analyzed.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 A
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• pp.492-494
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• 1999

To improve safety operation of urban transit, compatible design of signaling system is most important factor at future train operation and management. Therefore, signaling system should be designed compatible transport demand of target year. In addition, signaling system should be designed improved train safety, based fail-safe principle. Most of all, to solve passenger concentration, high density and to improve efficiency of train operation. Headway improvement of train is most important. Train organization length of new urban transit as light rail is generally shorter than EMU. Therefore, to increase passenger service and operation efficiency, minimum headway of one minute in this system should be important required.

• 사상체질의학회지
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• 제10권1호
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• pp.25-40
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• 1998

Sasang Constitutional Medicine is the constition medicine and the basis which constitution reveals is the distinction of the nature and emotion. Therefore the theory of the nature and emotion is the foundation which Sasang Constitution Medicine is coming into being. The author studied the progress that the distinction of the nature and emotion was formed and analized the phenomenon presented by the distinction of it as the principle of the movement of Yin and Yang. The results are following; 1. The beginning of the operation of the nature begins from some one part(cho ; 焦) among four part. That consists of the first factor of constitution-revelation. In accordance with the distinction of the nature, the second factor, that is the distinction of the emotion is determined and the united distinction of the nature and emotion presents the Sasang constitution. 2. The operation of the nature and emotion is the movement of Qi by the property of Yin and Yang and that is the phenomenon presented by the logical and scientifical law. 3. The ontology of Lee Je-ma is Qi-monism. 4. Four emotion(Sorrow, Anger, Joy, Presure) are not partional concept of the emotion but total concept which include all of it.

• 실천공학교육논문지
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• 제8권2호
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• pp.95-101
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• 2016

본 논문에서는 디지털 논리회로의 동작 원리에 대한 이해를 돕기 위해, 스위치 기반 LED (Light Emitting Diode) Art 논리 회로 구현 방법을 소개한다. 브레드 보드를 이용한 디지털 논리회로 실습은 국내 교육과정의 고등학교 및 대학교 수준의 해당 학과에서 필수 교육과정으로 지정하고 있다. 하지만 실제 실습에는 기초적인 구현 예제가 부족하고, 이에 따른 결과로 복잡한 디지털 논리회로 예제를 통한 학습으로 디지털 논리회로의 기초 동작 원리에 대한 이해를 방해하는 문제점을 갖고 있다. 따라서, 스위치를 이용한 기초적인 실습예제이며, 다수의 출력 장치 신호들을 동시에 제어하는 논리회로의 필요성을 이해할 수 있는 LED Art 회로 구현 방법을 제안하고 시험하였다.

• Journal of Power Electronics
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• 제19권3호
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• pp.655-664
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• 2019

In order to analyze the nonlinear phenomena of the bifurcation and chaos caused by the switching of nonlinear switching devices in inductively coupled power transfer (ICPT) systems, a Jacobian matrix model, based on discrete mapping numerical modeling, is established to judge the system stability of the periodic closed orbit and to study the nonlinear behavior of Hopf bifurcation in a system under full resonance. The general flow of the parameter design, based on the stability principle for ICPT systems, is proposed to avoid the chaos and bifurcation phenomena caused by unreasonable parameter selection. Firstly, based on the state equation of SS-type compensation, a three-dimensional bifurcation diagram with the coupling coefficient as the bifurcation parameter is established with a numerical simulation to observe the nonlinear phenomena in the system. Then Filippov's method based on a Jacobian matrix model is adopted to deduce the boundary of stable operation and to judge the type of the bifurcation in the system. Then the general flow of the parameter design based on the stability principle for ICPT systems is proposed through the above analysis to realize stable operation under the conditions of weak coupling. Finally, an experimental platform is built to confirm the correctness of the numerical simulation and modeling.

• 상하수도학회지
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• 제25권3호
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• pp.325-334
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• 2011

Market Environment around water work industry is rapidly changing. ISO, International Organization for Standardization, announced the international water work service standard for comparison and evaluation between nations and businesses. And developed countries in water work are introducing market principle for growth of nation's water industry and reinforcement of its competitiveness. Also, some local governments entrusted their water utilities for improvement of competitiveness of water work. However, as some failure cases from overseas came out with emphasis, there are many refuting perspective about entrusted operation achievements of domestic water market. Hence, this paper evaluated competitiveness of domestic local water utilities from the perspective of productivity. After evaluating productivity using Malmquist productivity index, the authors compared and analyzed whether there is a difference of productivity between two different operating types by using Mann-Whitney test. As a result of analysis, it has shown that local water utilities achieved higher productivity at entrusted operation type rather than direct operation type. The local water utilities which chose entrusted operation had increased the productivity 13.9% on total factor productivity(TFP) during experimenting period, while the local water utilities which chose direct operation had increased 0.2%. The background of achieving this high productivity in entrusted operation was analyzed as a result of the higher technological effectiveness of a special water company. The result of this study can be referred when local government needs to decide on what operating types they will use.

• 간호행정학회지
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• 제7권3호
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• pp.497-509
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• 2001

The purpose of this study was to examine frequency of job performance, level of urgency, index of importance experienced by 138 new nurses who were working at 6 hospitals that had over 400 bed in Incheon and Bucheon. The data were analyzed using a SPSS program for descriptive statistics [numbers of job performance, level of urgency, index of importance(job performance+1/4 level of urgency)]. Some of the most frequent job performance were application of aseptic technique, application of principle of infection control, and medication (IV, PO, IM, supply fluid and electrolyte). Some of the most uncommon job performance were activity as a lecturer in nursing department, activity of arrangement of community resources, and participation in multidisciplinary conference. Some of the highest level of urgency were use of aseptic technique, CPR, application of principle of infection control, defibrillation for dysrhythmia, blood transfusion, observation of patient's status in procedure (operation), v/s check, intervention for improvement of respiratory function and medication of antihypertensives. Some of the lowest level of urgency were activity as a lecturer in nursing department, preceptor's activity, supervisor and delegation of job to nurse aids, attendance at nursing conference, activity of arrangement of community resources, participation in clinical teaching practice, participation in multidisciplinary conference, and delegation of patient care. Those were indirect patient care. The order was physiologic integration(60.99%), safety and effective nursing environment, psychosocial care, and health maintenance and improvement. The most importance item in maintenance of physiologic integration was medication. Some of the highest index of importance were aseptic technique and application of principle of infection control, v/s check, observation of patient's status in operation and medication. Some of the lowest index of importance were activity as a lecturer in nursing department, preceptor's activity, activity of arrangement of community resources, participation in multidisciplinary conference, nursing conference, participation in clinical teaching, and delegation of job to nurse aids.

• 한국도서관정보학회지
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• 제15권
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• pp.113-151
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• 1988

The enumerative classification schemes do not represent the tiny mass of knowledge embodied in a article in a periodical or in a chapter or a paragraph of a book. But today's information centers regard a tiny spot of knowledge embodied in a article as a class. we call this micro-thought. But the enumerative classification are manual systems, it cannot be a n.0, pplied to the automation of classification. The purpose of this study is to build a general principle for the automatic book-classification which can be put to use in library operation, and to present a methodology of the automatic classification for the library. The methodology used is essentially theoretical, Published works by and about Ranganathan, especially 6th edition of the CC were studied, analyzed. The principle of automatic book classification derived from the analysis of colon classification and facet combinations. The results of this study can be summarized as follows ; (1) This study confined the fields of library science and agriculture. (2) This study represent a general principles for the automatic book classification of library science and agriculture. (3) Program flowcharts are designed as a basis of system analysis and program procedure in library science and agriculture. (4) The principles of the automatic classification in library, science is different from that of agriculture. (5) Automatic book classification can be performed by the principle of faceted classification, by inputting the title and subject code into a computer. In addition, the expected value from the automatic book-classification is as follows (1) The prompt and accurate of classification is possible. (2) Though a book is classified in any library, it can have same classification number. (3) The user can retrieve the classification code of a book for which he or she wants to search through dialogue with the computer. (4) Since the concept coordination method is employed, a tiny mass of knowledge embodied in a article in a periodical or in a chapter or a paragraph of a book can be represented as a class. (5) By performing automatic book-classification, the automation of library operation can be completed.

• 의료법학
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• 제16권2호
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• pp.295-326
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• 2015

2012. 2. 1. 의료법이 개정되며 의료인은 2개 이상의 의료기관을 개설할 수 없을 뿐 아니라 운영에도 관여할 수 없게 되었다. 그러나 이러한 개정 법률의 입법목적이 무엇인지 불분명할 뿐 아니라 여러 제반사정을 기초로 입법목적을 확정하더라도 개정 법률이 그러한 목적을 달성하기에 적합한 수단이 되기 어렵다. 이 글에서는 의료법 개정 경과와 의료기관 1인 1개설주의의 연혁, 개정 의료법의 입법목적을 확정 검토하는 한편, 개정 의료법이 제한하는 기본권과 명확성의 원칙, 과잉금지원칙을 토대로 동 법률의 위헌성을 살펴보기로 한다.

• 한국콘텐츠학회논문지
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• 제21권9호
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• pp.136-148
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• 2021

본 연구는 음성을 예술적 표현 수단의 매개체로 사용하는 배우의 연기 예술에서 음성 기관의 독립적인 조절, 제어를 가능하게 하는 에스틸 보이스 트레이닝(Estill Voice Training) 모델의 이론적 원리와 구조연습 훈련이 배우 음성 운용에 적용될 수 있는 긍정적 효용성을 탐구하는 데 그 목적이 있다. 생성기관의 원리에 기인하여 음성 산출물의 상이점을 조절하는 음성 과학적 방법론에 대한 연구는 심리와 신체를 함께 아우르는 기존의 배우 음성 훈련에 비해 국내에서 활발히 소개되지 못하고 있는 현실이다. 음성은 해부 생리학을 근간으로 우리 몸에 대한 이해가 선행될 때 운용의 정확성과 안정성을 담보할 수 있을 뿐만 아니라 더 나아가 인물 창조의 요소인 인물의 음성적 성격화에도 기여할 수 있다. 배우 음성 훈련에서 자기 수용적 감각을 통한 훈련 모델을 고찰하는 것은 배우가 일련의 목표음을 산출하는 과정에서 원리적이며 실질적인 방법론으로 모색될 수 있다는 실용적 가치와 대안적 의의를 지닌다.