Cutis Marmorata Telangiectatica Congenita 의 1 예

이규석,정선립 대한피부과학회 1978 大韓皮膚科學會誌 Vol.16 No.2

Cutis marmorata telangiectatica congenita is a very rare congenital vascular anomaly, characterized by vascular mottling of the skin, telangiectasia, hemangioma and skin atropy at birth. The mottling may be generalized or localized in distribution and tends to fade spontaneously with age. A case of CMCT occuring in a 5 months old girl shows localized, reticuhted mottling of the skin and telangiectasia from the left buttock to the leg and s!in atrophy on the left knee. There was no other anomaly except the finger-tip sized capillary hemangioma on the letf scapular area and no change in the course for 8 months.

조경 공사 내역서 계산 자동화를 위한 소프트웨어 개발에 관한 연구

이규석,황국웅 한국조경학회 1992 韓國造景學會誌 Vol.20 No.2

The landscape architecture construction cost estimation includes the repeated calculation and updating. Thus, it is time-consuming, and one of the jobs which needs to be automated first. In Korea, the IBM compatible personal computer(PC) is the most widely used one in the landscape architecture firms. However, the software for landscape architecture construction cost estimation is not being used in the PC environment. Therefore, the purpose of this study is to develop the software which can be used to automate the calculation for the landscape architecture construction cost estimation, and runs in the IBM compatible personal computers(PC). The clipper '88 summer is one of the DBMS software packages, and it has many commands and functions and functions which reduces program lines and makes the programing efficient, especially in the programing work whose total source code lines do not exceed over 10,000 lines. So, it was used in this study. The software developed in the this study was tested using the real data, and it was found that it can be efficiently used in the following jobs. They are: (1) to calculate exactly and rapidly. (2) to use resources repeatedly. (3) to print out the results. (4) to store data files for the future use. The software, as discussed in this paper, reduces the time and efforts to be spent in the calculation for the landscape architecture construction cost estimation compared with the traditional approach using the pocket calculator.

고등학교 지구과학과 교육의 방향 설정

이규석,우종옥 한국지구과학회 1992 지구과학교육 학술발표회 Vol.1992 No.-

학술논문발표회 / 제3분과 발표논문 초록 : 수준별 교육과정과 열린교육을 고려한 과학교육의 방향

이규석 한국지구과학회 1998 지구과학 교육심포지엄 및 춘계학술발표회 Vol.1998 No.-

공원수목관리정보체계 구축 및 활용

이규석,김광식,황국웅,심경구 한국조경학회 1993 韓國造景學會誌 Vol.21 No.3

It is necessary for the park tree manager to have the current information about the status of trees, which can help him with right decisions. However, there are many problems in the existing management method such as huge amount of data, tedious work, and the difficult update work due to the lack of necessary data or the inappropriate data record and management method. The sole use of database management system(DBMS) cannot slove these problems because it cannot handle graphic data based on the locational information. So, it is imperative for the park manager to have locational data as well as attribute data of the park tree concerned. Therefore, the purpose of this study is to develop the personal computer-based, user friendly park tree management information system, which deals with attribute data(DBMS) and graphic data(using the CAD) together within the integrated environment. The park tree management information system developed in this study provides a complete operating environment for data input, update, query, delete, and retrieve. The major advantages of this system are as follows: 1) To search the location and distribution of trees. 2) To record, store, and manage data easily. 3) When the manager is changed, delivery of the park tree work is convenient. 4) The system can help the manager with the correct information for the efficient park tree management.

초청강연 1 : 지구과학 교육과정의 발전과정

이규석 한국지구과학회 2000 지구과학 교육심포지엄 및 춘계학술발표회 Vol.2000 No.-

일반적 큐의 큐길이 분포에 대한 근사방법 M+$\Sigma$NjDj/M/1 큐에의 응용

이규석,김영섭,박홍식 한국통신학회 1994 한국통신학회논문지 Vol.19 No.5

In this paper we develop an approximation formalism for the queue length distribution of general queueing models. Our formalism is based on two steps of analytic approximation employing both the lower and upper bound techniques. It is favorable to a fast numerical calcuation for the queue length distribution of a superposition of a superposition of arbitary type traffic sources. In the application. M+ N D /M/1 is considered. The calculated result for queue length distribution measured by arriving or leaving customers show a good agreement with the direct simulation of the system. Especially, we demonstrate that our formula for M/M/1 is equivalent to the exact solution, while that D/M/1 is simplified in an analytic form.

Self-Consistent Subband Calculations of AlGaN/GaN Single Heterojunctions

이규석,Doo-HyubYoon,Sung-BumBae,Mi-RanPark,김길호 한국전자통신연구원 2002 ETRI Journal Vol.24 No.4

We present a self-consistent numerical method for calculating the conduction-band profile and subband structure of AlGaN/GaN single heterojunctions. The subband calculations take into account the piezoelectric and spontaneous polarization effect and the Hartree and exchange-correlation interaction. We calculate the dependence of electron sheet concentration and subband energies on various structural parameters, such as the width and Al mole fraction of AlGaN, the density of donor impurities in AlGaN, and the density of acceptor impurities in GaN, as well as the electron temperature. The electron sheet concentration was sensitively dependent on the Al mole fraction and width of the AlGaN layer and the doping density of donor impurities in the AlGaN. The calculated results of electron sheet concentration as a function of the Al mole fraction are in excellent agreement with some experimental data available in the literature.

Optimum Design of Dye-Sensitized Solar Module for Building-Integrated Photovoltaic Systems

이규석,강만구 한국전자통신연구원 2017 ETRI Journal Vol.39 No.6

This paper presents a method for determining the optimum active-area width (OAW) of solar cells in a module architecture. The current density–voltage curve of a reference cell with a narrow active-area width is used to reproduce the current density profile in the test cell whose active area width is to be optimized. We obtained self-consistent current density and electric potential profiles from iterative calculations of both properties, considering the distributed resistance of the contact layers. Further, we determined the OAW that yields the maximum efficiency by calculating efficiency as a function of the active-area width. The proposed method can be applied to the design of the active area of a dye-sensitized solar cell in Z-type series connection modules for indoor and building-integrated photovoltaic systems. Our calculations predicted that OAW increases as the sheet resistances of the contact layers and the intensity of light decrease.

ATM 다중화기의 MMPP/D/1 큐잉 모델의 큐길이 분포에 대한 근사방법

이규석,김영섭,박홍식 한국통신학회 1994 한국통신학회논문지 Vol.19 No.11

Our previously proposed method is further applied to find the queue length distribution of MMPP/D1 in an ATM multiplexer. We derive some useful relationship between the queue distribution seen by arriving cells and for a server befor each service. The relations were used to improve out approximation. For MMPP/D1 the calculated results show a good agreement with those obtained by a simulation of the system. Furthermore, our approximation provides fast numerical algorithms for general traffic models. These advantages demomstrate that our approximation method is useful for a fast and accurate traffic analysis in ATM networks.