• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1987년도 전기.전자공학 학술대회 논문집(I)
• /
• pp.407-410
• /
• 1987

A layout design concept which suppress the substrate current generated during the switching transients of an CMOS inverter is presented. The amount of hot carriers and the peak value of substrate current can be reduced by changing the device geometry ratio of driver and load device of an CMOS inverter.

• 대한수학교육학회지:학교수학
• /
• 제1권1호
• /
• pp.19-37
• /
• 1999

In this study, we examined some matters related to the learning of variable concept in school mathematics on the basis of the theoretical foundation from the previous studies(e.g. Davis, 1975; Rosnick, 1981; IK chemann, 1981; Wagner, 1983.) and practices on variable concept teaching by evaluating the current state of that. Matters be discussed are as follows; the use of symbol for place holders in elementary mathematics, the dealing with sets those elements are literals and operations of such sets, the teaching of dummy variable, the construction of literal expressions that contains variables, the labeling indeterminates as a constant, the change in the exact meaning of variable according to the function concept, the teaching of a generalization by means of variables. After considering on these matters that are connected with the teaching-learning of variable concept, we suggested the alternative proposal to the current state of variable concept teaching.

• Steel and Composite Structures
• /
• 제5권2_3호
• /
• pp.159-168
• /
• 2005

Four design codes/regulations for steel structures in Japan are briefly reviewed. Some of them employ the limit state design concept while the others are still based on the allowable stress design concept. The process for revision is now in action. The directions in the development of structural design codes are also reported herein. It is noted that a current trend in this development is to employ the performance-based design concept that has been successfully implemented in some seismic design codes.

• 턱관절균형의학회지
• /
• 제11권1호
• /
• pp.1-11
• /
• 2021

Dystonia is a neurological disorder characterized by involuntary and uncontrollable muscle tonus abnormalities. It is a huge burden not only to the patients and their families, but also to the field of medicine, in that there has hardly been any substantial change in the concept of and approach to this intractable disorder and therefore no breakthrough to its diagnosis, evaluation and treatment. As an effort to solve the current impasse, this review briefly summarizes the current concept, etiology, diagnosis, treatment and management, and then suggests a rather new therapeutic approach to this disorder, based on the concept of neurological balance and TMJ integrative approach. These new approaches will provide a platform for the clinicians and researchers to have a leap in the concept, diagnosis and therapeutics.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
• /
• pp.854-857
• /
• 2009

The concept of a microplasma current switch for a device operated in a current mode like organic light-emitting diodes, which features matrix addressability and current switching, is presented as well as its architecture and operational principle. To verify the concept, we have fabricated a 100 mm ${\times}$ 100 mm microplasma current switch panel with a cell pitch of $1080{\mu}m{\times}1080{\mu}m$. Moreover, the current-voltage measurements of the unit cell are performed for three different driving voltage amplitudes. They show the characteristic of an asymmetric floating double probe diagnosing plasmas.

• Journal of Electrical Engineering and Technology
• /
• 제10권3호
• /
• pp.1349-1355
• /
• 2015

It is difficult to calculate the magnetic force of an object of magnetic material in contact with other objects using the existing methods, such as Maxwell stress tensor method, magnetic charge method, or magnetizing current method. These methods are applicable for force computation only when the object is surrounded by air. The virtual air-gap concept has been proposed for calculating the contact force. However, its application is limited to magneto-static system. In this paper, we present the virtual air-gap concept for contact surface force in the eddy-current system. Its validity and usefulness are shown by comparison between numerical and experimental examples.

• 복식
• /
• 제54권2호
• /
• pp.53-65
• /
• 2004

As the contemporary public consensus prefers individuality to classical things, they have gotten sick of the universality and pursue fashion anew. As a result the new concept of artistic value delivers a shock to ordinary and traditional images. The bizarreness culture of fashion contains two extremes, horror and humor. which make people uneasy but amused by sensuous descriptions. Bizarre things captivate the audience regardless of the violent stimuli. The conversion of aesthetic consciousness is brought accordingly by horror and humor. In this paper, It is discussed that the concept of history of bizarreness and the social effect from its phenomena in current fashion are expressed through the two methods above. The bizarreness phenomena in current fashion is shown as a new hybrid type which has been recreated and came out of the internet. This phenomena has caused abnormal results and ironically mixed products, what was once directness, violence and disgust, are on the other hand enjoyment and amusement. A widening field, the bizarreness phenomenon, as an important implication in which can completely change the current trend, will be on track as a crucial concept representing contemporary cultures.

• Journal of Welding and Joining
• /
• 제19권6호
• /
• pp.643-651
• /
• 2001

A new waveform control technique has been developed for suppressing the spatter generation in the repelled transfer mode of high current $CO_2$ welding. Based on the spatters in repelled transfer, a waveform concept of concept was established in a way to drop the welding current to lower level right before the pendant weld drop detatchment so that the explosion force associating with drop detatchment was decreased. There were several variables to be controlled such as the moment of current drop, the base current and the time of retention at the base current. Either at lower base current or at longer retention time, the more instantaneous shot circuits were int개duced and thus the spatter generation rates were increased. With optimizing the control variables, the amount of spatter generated was decreased by about 30%.

• 대한수학교육학회지:학교수학
• /
• 제8권2호
• /
• pp.123-138
• /
• 2006

이 연구는 분수 개념의 여러 가지 의미를 분석해보고, 분수 개념의 생성 과정을 역사 발생적으로, 심리적으로 분석하고 이를 바탕으로 현재 지도되고 있는 7차 교육 과정에 의한 교과서의 분수 개념 도입과 관련한 내용을 비판적으로 분석해 보면서 그 교육적 시사점에 대해 논의한 것이다. 그 논의의 결과를 요약하면 다음과 같다. 분할분수는 분류된 다른 분수와 그 의미가 중첩되어 있으므로, 다른 분수와 함께 묶어 분류하는 것보다 분할분수는 독립시키고 나머지 분수들을 분류하도록 한다. 그리고 분수 개념은 분배와 측정 과정에서 발생하였으므로 분수를 도입할 때 분배, 측정과 관련하여 등분할 활동과 양분수를 강조하는 것이 바람직하다. 또한 분수는 단위분수를 단위로 하여 구성되었으므로, 학교에서도 단위분수를 바탕으로 분수를 구성해 나가는 것이 바람직하다.

• 인터넷정보학회논문지
• /
• 제8권5호
• /
• pp.81-89
• /
• 2007

유비쿼터스 기술의 성장으로 사용자의 상황을 자동으로 인지하여 유용한 서비스를 제공해주는 상황 인식 추천 서비스가 요구되기 시작하였다. 그러나 기존의 상황 인식 추천 서비스는 상황에 따른 추천 정보를 개념 수준의 변화 없이 일관된 개념 수준의 정보만을 제공하였다. 그러므로 추천된 정보가 사용자의 현재 상황에서 처리하기 어려운 수준의 정보로 제공되어 사용자가 원하는 정보를 찾고 목적을 달성하기 위해서는 상당한 노력과 시간을 소요하게 되었다. 본 논문에서는 온톨로지의 개념 계층 모델을 이용하여 사용자의 상황에 맞는 정보의 수준을 결정하고 정보를 추천하는 상황 인식 추천 시스템(OCARCH)을 제안한다. 그리고 기존의 상황 인식 추천 서비스와의 비교 실험을 통해 본 논문에서 제시한 개념 계층 모델을 이용한 상황 인식 추천 시스템이 더 뛰어난 성능을 보임을 증명한다.