조건 술어 분석을 이용한 능동규칙의 조건부 처리 시스템

이기욱,김태식,Lee, Gi-Uk,Kim, Tae-Sik 한국정보처리학회 2002 정보처리학회논문지D Vol.9 No.1

능동 데이터베이스 시스템은 특정한 상태를 탐지하는 능동규칙을 도입한다. 조건부 평가는 사건이 발생할 때마다 수행되기 때문에 조건부를 처리하는 방법에 따라 시스템의 성능에 중요한 영향을 미친다. 본 논문에서는 차이트리 구조, 분류트리, 그리고 집계함수 테이블을 생성하는 전처리 기능을 갖는 조건부 처리 시스템을 제안한다. 전처리는 능동규칙을 미리 파악할 수 있는 능동 데이터베이스의 특징 때문에 도입될 수 있다. 본 논문에서는 선택연산, 조인연산, 그리고 집계함수를 효율적으로 처리할 수 있는 차이트리를 제안하고 조건부의 처리 성능을 높인다. 그리고 조인연산을 효과적으로 처리하는 분류트리와 높은 처리비용을 요구하는 집계함수를 처리하는 집계함수 테이블을 제안한다. 본 논문의 조건부 처리 시스템은 전처리 기능에서 만들어진 조건부 처리 구조 때문에 조건 비교의 횟수를 감소시켜 능동규칙에서 조건부 처리의 성능 향상을 기대할 수 있다. The active database system introduces the active rules detecting specified state. As the condition evaluation of the active rules is performed every time an event occurs, the performance of the system has a great influence, depending on the conditions processing method. In this paper, we propose the conditions processing system with the preprocessor which determines the delta tree structure, constructs the classification tree, and generates the aggregate function table. Due to the characteristics of the active database through which the active rules can be comprehended beforehand, the preprocessor can be introduced. In this paper, the delta tree which can effectively process the join, selection operations, and the aggregate function is suggested, and it can enhance the condition evaluation performance. And we propose the classification tree which effectively processes the join operation and the aggregate function table processing the aggregate function which demands high cost. In this paper, the conditions processing system can be expected to enhance the performance of conditions processing in the active rules as the number of conditions comparison decreases because of the structure which is made in the preprocessor.

군사법 제도개혁의 핵심과제

이기욱?(Lee, ki-Wook) 한양법학회 2004 漢陽法學 Vol.15 No.-

전자주권제도의 도입에 관한 연구

이기욱,Lee, Ki-Wook 한국디지털정책학회 2009 디지털융복합연구 Vol.7 No.4

Electronic methods are already used in money transfer and credit cards transactions and electronic money and checks, which can substitute cash and coins, are being discussed. Recently, the Acts of Electronic Draft have been enacted, in order to make the money in the market flow efficiently. Also electronic bill of lading has been adopted for the practical use of international shipments. However, despite of the effort from the academia and practice, investments to stocks, especially in the stock exchange, is not quite perfectly electronic. Japan enacted a relevant act in 2004 which make its stock market totally dematerialized. This writing summarizes some issues in interpretation that arise in the course of operation of the Stock Electronic Registration System at the present time of 6 months after it came into effect and its purpose, by doing so, is to prevent in advance the kind of problems in introducing the similar system to Korea.

Effect of solution pH on the microstructural and rheological properties in boehmite suspensions

이기욱,Kim Seong Hwan,이다영,Lee Kwan-Young,Byoungjin Chun,정현욱 한국유변학회 2023 Korea-Australia rheology journal Vol.35 No.1

The relationship between microstructure changes and rheological properties in suspensions containing boehmite particles, which are well applied in various industrial wash-coating processes, was investigated by changing pH condition. The boehmite particles in suspensions were either well dispersed or aggregated depending on the pH, owing to the relative contributions of repulsive interaction between particles as well as hydrolysis and condensation reactions. Four groups of boehmite suspensions were classifi ed as very low, intermediate, almost zero charge, and high pH regimes based on their colloidal behaviors, and their microstructural diff erences were investigated using transmission electron microscopy (TEM) and multi-speckle diff using wave spectroscopy (MSDWS). For gel-like suspensions of three groups, various rheological properties such as shear viscosity, viscoelastic modulus, yield stress, and recovery behavior were extensively compared, and the results clearly demonstrated that a suspension with high yield stress was not fully recovered into the original state when disturbed at high shear rates.

고출력 환경에 적용 가능한 광대역 다층 구조 레이돔

이기욱(Ki Wook Lee),이경원(Kyung Won Lee),문병귀(Bang Kwi Moon),최삼열(Samyeul Choi),이왕용(Wangyong Lee),윤영중(Young Joong Yoon) 한국전자파학회 2018 한국전자파학회논문지 Vol.29 No.1

고출력 응용환경에 적용 가능한 광대역 다층 구조 레이돔을 개발하였다. 이를 위해 다층 레이돔의 전파전파특성을 ABCD 행렬로 표현하였고, Particle swarm 최적화 알고리즘을 상용 수치 모델링 툴로 구현하여 레이돔의 최적화된 층별 두께와 물질상수를 구하였다. 바람, 눈, 얼음 등 외부 기상 환경을 고려한 기계적 특성을 감안하여 레이돔을 재설계하였다. 대형구조물의 제작 제한조건을 고려한 두께를 재산출하여 전력 전달특성을 재분석하였다. 대기 정전파괴 때보다 10 ㏈ 높은 첨두 전기장의 세기 조건에서 상용 해석 툴을 이용하여, 설계된 레이돔의 RF에 대한 대기 정전파괴 특성을 분석하였다. 설계된 다층 레이돔을 제작하여 소신호 및 대신호 시험을 수행하였고, 상용 도구들을 사용한 계산값과 비교하여 목표 성능을 획득하였다. In this paper, we developed a broadband multi-layered radome applicable for high-power applications. In this regard, we presented the wave propagation characteristics of the broadband multi-layered radome with the ABCD matrix and obtained the optimal thickness and the material constant for each layer by an optimization algorithm called “particle swarm optimization,” implemented by a commercial numerical modeling tool. Further, we redesigned it in view of mechanical properties to reflect environmental conditions such as wind, snow, and ice. The power transmission property was reanalyzed based on the recalculated data of each layer’s thickness to consider the limitations of the fabrication of a large structure. Under the condition of a peak electric field strength that is 10 ㏈ above the critical electric field strength in air breakdown, we analyzed the air breakdown by radio frequency(RF) in the designed radome using the commercial full-wave electromagnetic tool. The radome was manufactured and tested by continuous wave(CW) RF small signal and large signal in an anechoic chamber. The test results showed good agreement with those attained by simulation.

SNS 기반 재무관리 앱

이기욱 ( Ki-wuk Lee ),이다희 ( Da-hee Lee ),임진수 ( Jin-su Lim ),정세희 ( Se-hui Jeong ),이성철 ( Sungchul Lee ) 한국정보처리학회 2022 한국정보처리학회 학술대회논문집 Vol.29 No.2

본 앱은 SNS 기능이 탑재된 재무관리 앱으로, 가계부에 전에 없던 SNS 기능을 추가시켜 가계부와 SNS를 동시에 즐길 수 있으며 가계부에 작성한 내용을 공유하여 여러 유저들에게 지식과 정보를 공유할 수 있다.

EU에서의 이사보수규제

이기욱 ( Ki Wook Lee ) 경상대학교 법학연구소 2010 法學硏究 Vol.18 No.1

이사의 회사정보수집권

이기욱(Lee, Ki-Wook) 한양법학회 2021 漢陽法學 Vol.32 No.3

In order for sound corporate governance to function effectively, proper behavior of directors is important in corporate operations. Our commercial law stipulates the right to collect information from directors in the form of reporting claims. That is, Article 393 requires the Director to report to the Board at least once every three months to ensure that the Director has the right to collect information in the form of a reporting claim to require the Representative to report to the Board on other directors or employees’ work. Such information collection rights are stipulated in the form of reporting claims, so there are inherent limitations, concerns about the concealment of unfavorable information or the provision of false information, and concerns about the CEO’s involvement due to the indirectness of regulations. This paper reviews the contents of the company’s information collection rights by U.S. directors, which are considered a major model of the company’s information collection rights under our commercial law. Based on this, we would like to obtain useful suggestions on the form of company information collection rights by directors under our commercial law. In Korea, the method of supervising work by individual directors through the board of directors lacks speed, and as a result, it is difficult to expect a mobile supervisory function by directors. In order to improve the supervisory function of the board of directors and make it effective, it is necessary to consider recognizing the right to collect company information for individual directors. In particular, it can be thought of as a necessary method to exercise supervisory functions by outside directors. These measures are also expected to have positive results in securing transparency in corporate management. The recognition of the right to collect company information to the director may serve as the basis for the pursuit of responsibility if the right is not exercised properly behind it. It is possible to think of concerns that it could shrink directors, but it is highly necessary to recognize the right to collect company information to enhance the function of management supervision. However, certain restrictions will need to be set on the purpose or target of the event. Measures to prevent information leakage are also needed, with directors exercising their right to collect information from the company as informants. A way to increase its effectiveness is to conclude an agreement on confidentiality to prevent restrictions on investigation targets or fraudulent use of information by the court, while imposing certain sanctions if violated.

타인을 위한 손해보험계약상 피보험자의 권리

이기욱(Lee, KiWook) 한양법학회 2011 漢陽法學 Vol.33 No.-

자동차 윈도우 레귤레이터 와이어에 미치는 인장력 연구

이기욱(Lee Ki wook),박순철(Park Soon Cheol),정원욱(Jung Won Wook) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11

Typical power windows of automobile are composed of wire and motor regulator. This type of wire was occasionally broken at the field. So It’s tension of wire study was measured at all circumstances (normal temperature and cold temperature). The tension and drive current were increased sharply at the initial working, especially at low temperature. This study will improve the design of window regulator and durability performance.