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주광로,최성복 서강정보대학 1996 論文集 Vol.15 No.-
As the development of infocommunicational technologies and the increase of computer utilization have accelerated the information-oriented society, the security problem of information systems is getting a growing interest and the importance of regulations and procedures for the security problem is increasing. Information systems have to secure the auditability in order to prevent the illegal leakage of information and to track down the violators of control principles. And they also need an audit trail mechanism in order to clarify the information system managers' liabilities and to visualize those users' behaviors. Fundamentally, the audit trail is used as a method for the statistical accountability that tracks down who used which resources in what time and in which order and for the claim of using charge, the maintenance of statistics, the backup and so on. Recently, with the addition of security issues that supervise and log the inappropriate use of system resources, how to track down the illegal access to the information system has become the main issue. In order to construct the audit trail mechanism as above-mentioned, this study proposes a logical model for safe audit logging system based on UNIX system, according to the utility, the security and the perpetuity of audit log and the implantation onto the existing systems.
레거시 시스템 이해 도구를 위한 효율적인 코볼 코드 분석기 설계 및 구현
주상현,임동기,정민수 慶南大學校 附設 工業技術硏究所 2003 硏究論文集 Vol.21 No.2
최근 컴퓨팅 환경이 변화함에 따라 현재 운용되고 있는 레거시 시스템을 새로운 환경에서도 운용할 수 있도록 시스템을 현대화하는 연구가 활발히 진행되고 있다. 특히 소프트웨어 재사용 기술과 함께 컴포넌트 기술이 개발, 보급됨에 따라 기존 시스템을 컴포넌트로 변환하거나 연계하는 방법들이 연구되고 있다. 그러나, 레거시 시스템은 중요성과 안정성으로 인해서 쉽게 새로운 시스템으로 전환하기가 쉽지가 않다. 그래서, 레거시 시스템의 현대화를 위해서 재개발, 변환, 래핑 등의 다양한 방법을 사용해서 새로운 시스템 환경에서 사용 가능하게 한다. 이 방법을 사용함으로써 신뢰성과 안정성을 향상시킬 수 있게 된다. 본 논문에서 추출정보, 플로우 그래프, 프로그램 콜 그래프, 패러그래프 플로우 그래프 등에서 사용될 핵심변수와 패턴 식별을 위한 레거시 시스템과 릴레이션 방지 기술을 가진 효율적인 코볼 코드 분석기를 소개한다. Computing environment is changing much recently Legacy system should be executed in new environment. Modernization research of system is progressing so that can be executed in these environment. According to the development and supply of the component technology and software reuse technology. We are studied and interested in conversion and connection of component methods. But the importance of legacy system, it is hard to convert by easily new system. Make use of legacy system just as it is using methods of redevelopment, transformation, wrapping etc. It is available in new system environment and improve trustability and stability. In this paper, we introduce a legacy system and design a efficient cobol code analyzer which has a redundant relation preventing technology to create core variable and pattern discernment that is used to abstraction information and flow graph, program call graph, paragraph flowing graph etc.
주성현,허태철 慶北大學校農業科學技術硏究所 1995 慶北大農學誌 Vol.13 No.-
This study was carried out to investigate the Physico-chemical Properties of Maeye-Dong Experiment Forest Soils. It is important to get fundmental information for establishment of economic and enviromental forest stands. The results obtained from this study were as follows: 1. The range of soil texture was in loamy sand and sandy loam. 2. The pH of Maeye-Dong Experiment forest soils found to be lower than that of Korean brown forests. 3. Most of investigated areas were known to be lack of exchangeable cation and nitrogen. 4. Fertilizer application should be advanced for establishment of economic and enviromental forest stand.
AGV 용 서스펜션의 진동 모드에 관한연구 : 중력 가속도가 5G인 경우 A Case of Gravity Acceleration is 5G
주만식,김민주,이승수,최영철,추정근,김중완,전언찬 한국공작기계학회 2000 한국공작기계학회 추계학술대회논문집 Vol.2000 No.-
This study is to choose the most proper model for AGV throughout simulation of behavior of suspension to reduce trial and error because there is no AGV treating heavy weight at harbor loading and unloading at home. Therefore, we estimate the vibration modes of the various suspension applied to AGV, which is over 75 ton included the weight of two containers on 5G using the Matlab, one of the simulation programs
9-12%Cr강의 첨가원소 및 열처리에 따른 미세조직거동과 경도변화
주성욱,유정훈,신기삼,허성강,이재현,석진익,김병훈,김정태 국립7개대학공동논문집간행위원회 2004 공업기술연구 Vol.4 No.-
9-12%Cr steel are getting increasing attention for expanded application as high temperature materials applicable for gas turbine compressors, steam turbine rotors, blade and casing. For efficient and extensive application of 9-12%Cr steel, the data in addition to the improvement of mechanical properties on the correlation of microstructural evolution and mechanical properties are inevitable and thus the investigation in this study is performed for the determination for the specimens heat-treated at 600, 650 and 700℃ for 1000, 3000 and 5000hrs. The microstructure of as-received specimen was tempered martensite, with a high dislocation density and secondary phases. Upon high temperature heat-treatment, the martensite lath got larger and dislocation density decreased resulting the reduction of the strength. In addition, sharp growth of secondary phases was observed in the specimen heat-treated at 700℃ for 5000hrs. A specimen aged at 600℃ and 650℃ Laves phase was observed. The hardness showed close relationship with the secondary phase particle and dislocation density.
Development of a Chest‑Belt‑Type Biosignal‑Monitoring Wearable Platform System
Joo‑Hyeon Lee,Hyun‑Seung Cho,Jin‑Hee Yang,Sang‑Min Kim,Jeong‑Whan Lee,Hwi‑Kuen Kwak,Je‑Wook Chae 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.4
The purpose of this study was to develop a wearable platform system that can detect and acquire a soldier’s biosignals (i.e., heart activity signal, respiration rate, etc.) in a nonrestrained, unconscious manner. These detected biosignals are transmitted to a processing device to analyze and monitor the soldier’s physical status. To achieve this, textile-based heart activity electrodes and a strain gauge sensor for the respiration signal measurement were developed, and their performances in detecting each signal were verifed. These sensors were embedded in a chest belt to design a wearable platform that can simultaneously measure heart activity and respiration signals. The sensor part of the chest belt has a dual layer structure to detect high-quality signals. Stretch fabric was used on the outer layer and a respiration sensor was attached to the belt. On the inside layer, a non-stretch fabric was used as the base fabric and a heart activity-sensing electrode, that is capable of taking measurements using a modifed lead-II heart activity signal induction method, was embroidered onto the fabric. Subjects were asked to wear the chest belt, and a biosignal processor module was attached to verify the system’s performance while simultaneously acquiring the heart activity and respiration signals. More specifcally, it was confrmed that the two signals were detected in a stable. It is expected that the biosignal-monitoring wearable platform system developed in this study will be able to efectively analyze and monitor soldiers’ biosignals.
혈압 및 혈관손상에 대한 Candesartan과 Cilnidipine의 병용투여 효능 평가
정상혁,한주희,명창선 충남대학교 약학대학 의약품개발연구소 2014 藥學論文集 Vol.29 No.-
This study was designed to evaluate the effect of candesartan combined with cilnidipine on high blood pressure in spontaneous hypertensive rats (SHRs) and vascular injury induced by cuff-placed neointimal hyperplasia model. To measure blood pressure, low and high doses of candesartan (0.765 and 1.53 mg/kg/day) and cilnidipine (0.96 and 1.92 mg/kg/day) alone or in combination were orally administered in telemetered-SHRs for 2 weeks. To examine the protective action of vascular injury, high doses of candesartan (1.53 mg/kg/day) and cilnidipine (1.92 mg/kg/day) alone or in combination was orally administered for 2 weeks in cuff-induced neointimal hyperplasia model of C56BL/6 mice. As a result, high doses of candesartan and cilnidipine in combination decreased in systolic blood pressure (SBP) and mean arterial pressure (MAP) as compared with monotherapy of high dose of each drug, but not statistically significant. In vascular injury model, candesartan and cilnidipine in combination decreased BrdU-positive cells in neointima and vascular smooth muscle cell proliferation as compared with monotheray of each drug. Thus, these results indicate that the combination of candesartan with cilnidipine is effective for the protection of vascular injury, suggesting this combination to be a valuable tool for the management of vascular remodelling such as restenosis.