델타변환 무정전전원장치 시스템의 특성 시험

지준근(Ji Jun-Keun) 한국산학기술학회 2005 한국산학기술학회논문지 Vol.6 No.6

본 논문에서는 일명 델타변환 무정전전원장치(UPS)로서 알려져 있는 3상 라인 인터랙티브 UPS 시스템의 성능 시험에 대해서 다루고 있다. 델타변환 UPS는 종래의 단일 변환 라인 인터랙티브 UPS 시스템에서 직렬 인덕터를 제거하고 직렬 및 병렬 PWM(Pulse Width Modulation) 컨버터를 사용하는 새로운 라인 인터랙티브 UPS 시스템으로 전원 전류를 직접 제어함으로써 UPS 시스템의 입출력 특성들이 상당히 개선되는 것으로 알려져 있다. 여기서는 UPS 시스템의 성능 시험에서 중요한 내용들인 부하시험, 정전/복전시험, 동기절체 시험 등에 대한 결과들을 제시하고 델타 변환 UPS 시스템에 대한 전반적인 평가를 한다. In this paper, test on characteristics of 3-phase line-interactive UPS system, known as delta conversion UPS system, is studied. Delta conversion UPS system is new line-interactive UPS system using two series-parallel PWM converters instead of using series inductor in conventional single conversion line-interactive UPS system. It is known that the characteristics of input and output in delta conversion UPS system is much improved by controlling source current of AC lines directly. Here the results on load test, normal/backup mode test, and normal/bypass mode test, which are very important in the test on characteristics of UPS system, is presented. And finally overall evaluation on delta conversion UPS system is given.

비정상 과도상태에서의 해군 전투체계 UPS 개선

김성후,최한고 한국융합신호처리학회 2018 융합신호처리학회 논문지 (JISPS) Vol.19 No.3

This paper addresses an improved naval combat UPS(Uninterruptable Power Supply) system under abnormal transients. Previously, thermistor and varistor elements were used to cope with transient overvoltage and overcurrent, however the UPS was frequently unavailable because it was vulnerable to abnormal transient voltage generated during system operation. In order to overcome this problem and protect UPS system, this paper proposes an input power cut-off circuit that detects the initial input power and abnormal transient voltage generated during operation, improvement of power control sequence, and a method to prevent malfunction of an inverter and CPU. The UPS system implementing the proposed method was simulated by input power variable test using programmable AC/DC generator, and finally validated its reliability and stability through field tests by mounting on multifunctional console of naval combat system. 본 논문에서는 비정상적인 과도상태에서의 개선된 해상 전투체계 UPS(Uninterruptable Power Supply) 시스템을 다룬다. 기존에는 일시적인 과전압 및 과전류에 대응하기 위하여 서미스터와 바리스터 소자를 사용하고 있지만 시스템 운용 중에 발생하는 비정상 과도전압에는 취약하므로 UPS가 비가용 상태로 되는 경우가 빈번히 발생하였다. 이를 극복하고 UPS 시스템을 보호하기 위하여 본 논문에서는 초기 입력전원 및 운용 중에 발생되는 비정상 과도전압을 감지한 입력 전원 차단회로, 전원제어 시퀀스 개선, 그리고 인버터 및 CPU 오동작 방지 방법 등을 제안한다. 제안된 방법으로 구현된 UPS 시스템은 Programmable AC/DC 발생기를 이용하여 입력전원 가변 시험을 통하여 시뮬레이션을 수행하였으며, 최종적으로 해상 전투체계의 다기능콘솔에 장착하여 현장시험을 통하여 신뢰성과 안정성을 검증하였다.

환경평가 모니터링 사업 세부과제 1 : 환경영향평가 사후관리 발전을 위한 실천전략 마련

최준규,박지현 한국환경정책평가연구원 2015 사업보고서 Vol.2015 No.-

환경영향평가제도는 도입 이래 비약적인 발전을 해왔으며 이제는 제도적 기반 안정기에 들어섰다는 평을 받고 있다. 때문에 최근에는 환경영향평가 사후관리의 정상화를 비롯한 환경영향평가제도의 내실 있는 성장에 관심이 모아지고 있다. 본 연구에서는 이러한 시대적상황에 맞추어 우리나라 환경영향평가 사후관리 활성화를 위한 실천전략을 제안하고자한다. 환경영향평가제도의 내실을 기하기 위해 환경영향평가 사후관리가 중요한 이유는 환경영향평가제도의 독특한 특징 때문이다. 환경영향평가는 일반적인 인ㆍ허가제도와는 달리미래상황에 대한 예측에 기반하는 특성 때문에 필연적으로 불확실성을 내포하고 있다. 이런 이유로 환경영향평가제도는 사후관리를 통해 보완되고 완성되는 것이며, 사후관리과정에서 축적되는 경험과 각종 자료들을 바탕으로 환경영향평가제도의 발전을 이룰 수있다. 우선 이상적인 환경영향평가 사후관리의 형태를 도출하기 위해 관련 선행연구들과 국외사례에 대한 분석을 수행하였다. 분석결과 도출된 이상적인 환경영향평가 사후관리는 사업승인 시 맺었던 약속의 이행 확인기능, 환경영향평가 과정 및 조사결과에 대한 검증과 보정기능, 환경영향평가 사후관리결과를 바탕으로 한 기법 및 제도발전 등의 환류기능과 대내ㆍ외 간 소통을 주요기능으로 한다. 다음으로는 우리나라 환경영향평가 사후관리의 현재를 파악하기 위해 운영 현황을 분석하였다. 분석결과 협의내용 관리에 치우쳐 있는 상황과 협의내용 관리에 있어 중복업무수행 등으로 업무 효율성이 저하되는 문제를 확인하였다. 사후환경영향조사의 경우 환경현황에 대한 모니터링 역할은 어느 정도 수행하고 있으나 검증ㆍ보정기능은 미약한 상황이었다. 환경영향평가 사후관리의 중요한 기능 중 하나인 환류기능은 우리나라 제도에는 아직까지 도입되지 못한 상황이다. 이러한 현실 상황을 반영하고 기존 연구에서 제시한 개선방안과, 관계자 면담 시 제안된방안들 그리고 연구진 논의과정에서 도출한 아이디어 등을 종합하여 제도발전 방향과 실천전략을 도출하였다. 최종 목표는 이상적 환경영향평가 사후관리의 주요기능인 약속이행, 검증ㆍ보정, 환류, 소통기능이 유기적 관계를 가지며 단일 환경영향평가 사후관리체제 내에서 제 역할을 수행하는 형태이다. 이상의 최종 목표를 달성하기 위해 현실 상황 간의 간극을 고려하여 단계별 전략을 수립하였다. 단기적으로는 하위법령 및 지침 수준에서 요구되고 있는 검증ㆍ보정기능을 협의내용 관리와 사후환경영향조사의 고유기능으로 내재화하여 각각의 수준을 향상시키는것을 목표로 하였다. 중기전략으로는 협의내용 관리와 사후환경영향조사를 통합 운영하는 체제로의 발전을 목표로 한다. 이와 더불어 중기에는 검증ㆍ보정기능의 지속적 향상과 정보화개선을 목표로 하였다. 장기전략은 환류기능의 도입에 중점을 두도록 하였는데 환류기능의 법적 근거를 마련하고 피드백체계를 마련하는 것을 목표로 하였다. 최종적으로는 이들기능이 하나의 체계에서 통합되어 운용되고 환류기능을 통해 해당사업으로의 내적 환류(저감조치 개선, 조사방법 조정 등)를 비롯한 외적 환류(제도개선, 기법개발 등)를 할수 있도록 발전하는 것이 목표이다. 각 단계별로 전략에서는 법.지침 개정사항, 프로세스개선, 연구과제 등의 구체적인 준비사항을 포함하여 제시하였다. 이와 같이 본 연구에서는 우리나라 환경영향평가 사후관리의 발전을 위한 방향성을 제시함과 동시에 단계별 실천전략을 제시하고 있다. 이를 바탕으로 체계적이고 지속적인 제도개선 및 연구개발이 수행될 수 있도록 함으로써 우리나라 환경영향평가 사후관리가 바람직한 방향으로 발전할 수 있을 것으로 기대된다. The Environmental Impact Assessment (EIA) system has made great progress since its introduction in Korea and its institutional foundation is acknowledged as having been settled. Therefore, eyes are now on the qualitative growth of the EIA system including the normalization of the EIA follow-up management. Given the context, we propose practical strategies for the vitalization and advancement of the EIA follow-up management system in this study. EIA follow-up management is important because of the unique characteristics of the EIA system. Unlike general authorization regime, the EIA is based on prediction of the future situation and is inherently subject to uncertainties. For that reason, the EIA is complemented and completed by the EIA follow-up management and the experience and data accumulated during the process contributes to the advancement of the EIA system. In this study, we first performed an analysis of relevant prior studies and cases of other countries in order to derive the ideal form of EIA follow-up management system. According to the analysis results, the ideal EIA follow-up management system includes functions to ensure the fulfillment of commitments made during project approval, verification and correction of the EIA process and investigation findings (auditing), feedback gathering to improve the analysis technique and system and internal and external communication. Next, we analyzed how EIA follow-up management is carried out in Korea to assess the current situation. In Korea, the EIA follow-up management is composed of two systems including the “of details of consultation” and “investigation of environmental impact after the fact”. According to the analysis result, Korea’s EIA follow-up management was found to be biased towards the management of details of consultation and work efficiency is undermined because the tasks are redundantly performed. In case of the investigation of environmental impact after the fact, while its function of monitoring the environmental impact has been carried out to some extent, its auditing function is not sufficient. In Korea, the feedback function which is an important component of the EIA follow-up management has not been introduced yet. By considering the above situations and reviewing the suggestions made in previous studies, recommendations made by related personnel during interviews and ideas derived during the discussion of the research team, we propose the system’s future direction and practical strategy. The final goal of the EIA follow-up management is to have the key features of the fulfillment of commitments, auditing, feedback and communication to function organically and fulfill their roles within the integrated EIA follow-up management system. We have established a step-by-step strategy to achieve the above-mentioned final objective. The short-term goal is to incorporate the auditing function stipulated in subordinate legislations and guidelines as an inherent function of the management of details of consultation and the investigation of environmental impact after the fact in order to improve the quality of each system. The mid-term goal is developing a single system which encompasses the management of details of consultation and the investigation of environmental impact after the fact. In addition, the mid-term goal is also to constantly improve the auditing function and build a better information system. The long-term goal is focused on introducing the feedback function to the EIA follow-up management system by laying the necessary legal basis and formulating a feedback system. The final aim is to integrate these features into a single EIA follow-up management system and developing a system to enable internal feedback (mitigation measures, research method adjustment, etc.) and external feedback (system improvement, technique development, etc.) via the feedback function. We suggested specific preparations such as laws and guidelines revisions, process improvements and research topics in each step of the strategy. In this study, we propose a practical step-by-step strategy while recommending the direction for the development of Korea’s EIA follow-up management system. Systematic and consistent policy improvements and research and development based on our suggestions will hopefully help the EIA follow-up management system evolve in a desirable direction.

초전도 플라이휠 에너지 저장시스템을 이용한 UPS 설계

정환명,최재호 전력전자학회 2000 전력전자학회 논문지 Vol.5 No.6

본 논문에서는 현재 전력저장시스템으로써 가장 많이 사용하고 있는 배터리를 대체할 목적의 5MB (Superconductive Magnetic Bearing)를 이용한 off-line UPS에 관해 연구하였다 영구자석의 덩어리형 고온 초전도 체위에서의 부상득성을 이용하여 베어링 문제의 해결방안에 접근함으로써 고효율의 FES찰 구성하여 단상 off-line UPS에 적용하였으며 제어회로에는 80C 1 96KC 마이크로프로세서를 사용하였고 빠픈 응답윤 요구하는 부분 은 아날로그회로를 사용하여 구성하였다. 에너지 저장모드에서 컨버터 입력천류는 전원전압과 동상의 정현파로 제어하였으며 에너지 회생모드에서는 출력잔압윤 정현파로 제어하기위해 필터커패시터전류릎 직접 제어하였다. 시작 품제작을 통해 시스템의 안장된 동작특성을 확인함으로써 제안된 FES가 Off-line UPS 에서의 에너지 저장매체로써 우수함을 입증하였다. This paper presents an off-line UPS using the high temperature superconductive magnetic bearing. FES(Flywheel Energy Storage) system has good advantages in compare with lead acid battery. So, high efficiency FES using high temperature SMB(superconductive magnetic bearing) was composed in this paper. The outer rotor type of PMSM(Permanent Magnet Synchronous Motor) as motor/generator was used for the experiment, and square wave current and sinusoidal wave control methods was compared for high efficiency operation of motor/generator. The circuit for in phase sinusoidal wave current control with EMF in the full speed range was designed and the proposed flywheel energy storage system was applied in single phase off-line UPS system. As the stable operation characteristics of prototype system was confirmed, the its excellence as energy storage device in Off-line UPS was proved.

ESS 기능을 갖는 LVDC/AC UPS 일체형 전력변환장치 개발

이원일,임승범,김지수 한국조명.전기설비학회 2023 조명·전기설비학회논문지 Vol.37 No.5

This paper introduces a UPS(Uninterruptible Power Supply) system that has an Energy Storage System(ESS) and can provide both LVDC(Low Voltage Direct Current) and AC outputs simultaneously. This system integrates an offline UPS, which is composed of bidirectional inverters and a battery converter, with an LVDC system consisting of a DC-DC converter. The LVDC system is designed to produce LVDC output by sharing the UPS's DC LINK, thus The LVDC system offers the advantage of compensating for power outages. Moreover, the proposed system has an ESS function that can distribute peak load through load leveling. The performance and functionality of the proposed system were validated through experiments in various scenarios, including normal operation, power outage situations, charging, and discharging.

국내개발 무기체계 수출 증진을 위한 한국형 후속 군수지원체계 구축 방안에 관한 연구

정석윤,이종호 대전대학교 안보군사연구원 2019 안보군사학연구 Vol.- No.16

The exports of domestic developed weapons system has been increasing since 2011 when the large scale export such as the T-50 aircraft was achieved. However, compared to the US, which is the advance exporting country of weapons systems, the establishment and operation of support system is insufficient. In order to facilitate the export program of defense products beyond the limited domestic market, it is necessary to institutionalize Korean type follow-up logistics support system to eliminate the suspicions of the follow-up logistics support doing the total life cycle of the weapon system from the purchasing country. In the short term, it is necessary to establish the technical assistance support, weapon system training, follow-up support for publications and technical data and support system for repair parts in connection with initial support. It is also to apply the FMS BO and the supply support agreement(CLASS) system to support the maintenance of the parts for operations of the system, and to operate the organization to build the korean type follow-up logistics support system. It would be desirable for organization to allow the DAPA to control the organization for subsequent logistics support, and the working organization to utilize each army organization, but increase it as the workload increase. In order to survive in competition with developed and emerging nations in the future, there is no experience of intergovernmental transactions to support the subsequent military logistics system in Korea. Through the establishment of korean type follow-on logistics support system proposed in this study, it is possible to increase the export possibility by securing the superiority in competition with the major countries in the global market by giving the confidence to the purchasing country of the domestic development weapon system, it is expected to contribute to improvement.

대학 창업지원제도 개선방안 도출을 위한 IPA분석: D대학 사례를 중심으로

남정민,유현경,김윤희,강은정,이현석,장경화,김수진 한국벤처창업학회 2022 벤처창업연구 Vol.17 No.2

The purpose of this study is to analyze the difference in importance and performance of the university start-up support system focusing on D university students to grasp the perception of the start-up support system provided the university from the perspective of students who are real users. Through this, a plan for qualitative growth and advancement of the university start-up system was derived using the IPA (importance-performance analysis) analysis. The findings are as follows. The importance of all elements of university start-up education and start-up support system is higher than the performance, which means that the start-up education and support programs currently implemented by universities are recognized as important, but do not play a big role in terms of performance for students. In addition, the highest priority factors for improvement in the importance-performance matrix were funding and investment support, start-up space and facilities support, management advisory, patent and intellectual property support, and entrepreneurship field practice. Therefore, This study can be used as objective data to identify the factors that universities should focus on and establish a start-up support system from a long-term perspective, and to build and operate a start-up support system that reflects the needs of students. 본 연구의 목적은 실수요자인 학생들의 입장에서 대학에서 제공하는 창업지원제도에 대한 인식을 파악하고자 D대학 학생을 중심으로 대학 창업지원제도의 중요도 및 성취도 차이를 분석하였다. 이를 위하여 IPA(importance-performance analysis)분석 방법을 활용하여 대학 창업지원제도의 질적인 성장과 고도화 방안을 도출하였다. 연구 결과는 다음과 같다. 대학 창업교육 및 창업지원의 모든 요소에 대하여 중요도가 성취도보다 높게 나타났는데 이는 현재 대학에서 실행하고 있는 창업 교육 및 지원프로그램이 중요하다고 인지되고 있으나, 수요자(학생)에게 성취도 측면에서 크게 작용하지 못하는 것을 의미한다. 또한 중요도-성취도 매트릭스에서 가장 개선의 우선순위가 높은 요인은 「자금 및 투자지원」, 「창업 공간 및 시설지원」, 「경영자문」, 「특허 및 지식재산 지원」, 「창업현장실습」 순으로 나타났다. 따라서 본 연구는 대학이 집중적으로 노력해야 하는 요소를 파악하고 장기적인 관점에서 창업지원제도를 수립하여 공급자 중심에서 벗어나 학생(수요자)의 요구를 반영하는 시스템을 구축·운영하는데 객관적인 자료로 활용될 수 있을 것이다.

일반논문 : 연체율의 분석을 통한 효율적인 소상공인 금융지원에 대한 고찰

이유태 ( You Tay Lee ),이성백 ( Seong Baek Yi ) 한국중소기업학회 2012 中小企業硏究 Vol.34 No.3

본 연구는 소상공인에 대한 금융지원인 정부의 정책자금과 일반 은행 대출의 실질연체율의 비교?분석을 통하여 국가 전체의 균형발전의 관점에서 소상공인의 경쟁력 향상을 위한 효율적인 금융지원을 어떻게 하여야 하는 가를 조사하였다. 분석결과에 나타난 주요 특징을 요약하면 첫째, 2008년을 제외하고는 정책자금의 연체율이 일반 은행 대출의 연체율보다 통계적으로 의미 있게 낮았으며 둘째, 정책자금과 일반 은행 대출 두 지원방법 다 지방은행의 실질연체율이 시중은행의 실질연체율보다 의미 있게 낮은 것으로 나타났다. 또한 전국에서 유일하게 별도로 자영업지원센터를 운영하는 지방 P은행의 경우 다른 지방은행과 비교해서도 낮았지만, 특히 시중은행과는 더욱 현저히 차이가 나서 그 차이가 일반 은행 대출의 경우 0.822%에 이르는 것으로 조사되었다. 소상공인을 금융 지원하는 정부의 정책자금과 일반 은행 대출의 실질연체율을 비교·분석한 결과를 요약 하면 소상공인을 지원함에 있어 컨설팅과 교육을 연결하여 대출을 실시하고 자율적이고 시장 원리에 맞는 지역 금융시스템을 구축해나갈 필요가 있다는 것이다. 일반 은행은 지난 10여 년간 일선에서 소상공인을 지원하면서 많은 경험과 인프라를 축적한 소상공인 지원센터 시스템 및 상담사의 상담 능력을 벤치마킹하여 대출과 연계하고 현재 정책자금을 실시하는 중요 주체인 소상공인 진흥원 및 소상공인지원센터는 보다 효율적인 금융지원이 될 수 있도록 더욱 컨설팅 및 교육 인프라를 확충하는 게 중요하다는 것이 본 연구 결과가 시사하는 바이다. This study analyzed the way for efficient financial support to improve the competitiveness of small enterprise through the comparison of the loan default rates between the policy fund and banks loan for small enterprise in light of national balanced economy. Important findings are as follows. 1) The default rate of the policy fund is lower than that of the banks loan for small enterprise except the year of 2008 and the difference among the default rates fetches to 0.243%. The difference in the default rates outstands in 2011. It may be due to the fact that the policy fund changes to the priority system which subsidizes the people first who took education and consulting courses beginning 2010. The financial support associated with education and consulting is expected to perform better than that without education and consulting in terms of the loan default rate. The fact that the interest rate of the policy fund is lower than that of banks loan could result in the lower default rate for the policy fund. Yet low interest rate turns out to be not related with low default rate in this analysis. Thus, it can be concluded that the financial support associated with education and consulting is superior to the other case. 2) The loan default rate of local banks is lower than that of nationwide banks across the policy fund and the bank loans. The difference in the loan default rate by local banks and nationwide banks amounts to 0.384% for the policy fund and 0.605% for banks loan. The result indicates that the loan to small enterprise is regionally oriented since small enterprise is based on the region. 3) The loan default rate of the local ``P Bank`` which operates the consulting center on its own for small enterprise is significantly lower than that of nationwide banks. The difference in the default rates amounted to 0.822%. Besides there was no notable difference across the policy fund and banks loan for ``P Bank.`` The loan default rate of the local ``P bank`` is lower than that of the other local banks, too. Therefore, the lower default rate of the policy fund is attributable to consulting and education system, not to lower interest rate set by the policy. It is concluded that the financial support for small enterprise works better with the appropriate consulting and education and local financial system needs to be constructed in accordance with this findings. It has been reported that the policy fund increases the sales volume of small enterprise and the fund has positive effect on the performance of management for small enterprise. But the policy fund can`t accomodate all of 2.7 million of small enterprise in Korea. Banks loan take most of loan to small enterprise. Therefore, The financial support under frequent start and closure of small enterprises these days needs to be associated with the appropriate consulting and education for the balanced economy as a whole. The outstanding banks loan to small enterprise now reached over 100 trillion won. If the default rate of bank loan ever rise, it gives much more financial distress to the banks. As a result, the national economy will surely suffer. The banks need to benchmark the expertise of the Small Enterprise Development System which has been accumulated over the last 20 years by serving numerous small enterprises. In addition, the Small Enterprise Development System which oversees the policy fund also needs to intensify the consulting and educational infrastructure for the efficient financial support to small enterprise in Korea. This paper finds that the superiority of the policy fund to the banks loan is attributable not to the lower interest rate of the policy fund, but to the role of the counsellor at the Small Enterprise Development System which provides the consulting and education and shows the way to the efficient financial system to strengthen the competitiveness of small enterprise in the future. When small enterprise borrows take loan from banks, the criteria for loan decision by banks should be based on its pure creditability. For regional financial system in accordance with spontaneous economic principle to work properly, the banks need to develop credit rating model associated with stylized and standard abilities of the counsellors at the Small Enterprise Development System. It is crucial since small enterprise, especially at the beginning stage in its business, does not have enough sound financial data for applying for banks loan. As a matter of fact, many of start-ups are excluded even from the policy fund since the lending process of the policy fund also puts a lot of emphasis on quantitative figure such sales volume, net income, etc. Therefore the policy fund tends to be not properly served according to its original purpose of aiding start-ups of small enterprises. The policy fund rather subsidizes mature small enterprises with good financial status. Considering that there is a great need for money at the beginning stage of small enterprise, the policy fund and banks loan need to be allocated more to start-ups rather than to growing enterprise with better statistics in terms of sales volume and managerial environment. The appropriate credit rating model needs to be developed by incorporating the evaluation and recommendation by the counsellors at the Small Enterprise Development System. The banks loan does not differentiate between small enterprise and an individual or self-employed although the government puts much energy in supporting small enterprise including making the law for small enterprise explicitly. Therefore, banks loan system needs to be coordinated in accordance with government policy for the competitiveness of small enterprise in light of national balanced economy, which in turn makes the aid more effective and efficient. This study yet has limitations in that the differences in default rates between the banks loan and the policy fund are compared in univariate way for each category of industries, interest rates, gender, age, the business history, etc. To analyze the determinants of the default rates of loan in more comprehensive way, multivariate regression analysis needs to be employed by designating the default rate as a dependent variable and industries, interest rates, gender, age, ways of supporting aids, the business history, etc. as independent variables. The data including financial statements for small enterprise in Korea is hardly available for the quantitative analysis such as regression analysis. Small sample of 7 banks analyzed, missing data, outliers, etc. are also restrictions for this analysis. It is advised that in future study more number of banks and more data after 2011 need to be analyzed to reach more meaningful conclusion for efficient way of financial support to small enterprise in terms of national economy.

컴퓨터 보안대책에 관한 연구

최응렬(Choi Eung Ryul),황영구(Hwang Young Gu) 한국민간경비학회 2005 한국민간경비학회보 Vol.6 No.-

  오늘날 컴퓨터의 보급 확산으로 인해 컴퓨터에 대한 중요성은 점점 커지고 있으며, 동시에 컴퓨터에 대한 안전이 점차 어려워지고 있어 컴퓨터 보안에 대한 인식과 대책이 무엇보다도 중요하다. 현재 우리나라 국민이나 기업들의 컴퓨터보안 의식 및 수준은 점차 나아지고 있지만 아직도 많은 기업에서는 컴퓨터 바이러스 백신을 사용하지 않거나, 방화벽을 설치하지 않는 기업이 많아 컴퓨터 바이러스, 해킹 피해 등 침해사례는 더욱 증가하고 있는 실정이다.<BR>  따라서 이 연구에서는 컴퓨터 보안대책으로서 물리적 보안대책, 기술적 보안대책을 중심으로 제시하였으며, 특히 기술적 보안대책이라고 할 수 있는 통신 보안대책에 대해서는 별도로 제시하였는데 그 내용은 다음과 같다.<BR>  첫째, 컴퓨터시설에 대한 경보장치의 설치, 컴퓨터시설의 조명장치, 신분확인을 통한 시설 내 접근통제 등 물리적 보안대책이다.<BR>  둘째, 컴퓨터 작동불능상태에서 데이터를 보관하는 유일한 방법인 백업시스템구축 등 기술적 보안대책이다.<BR>  셋째, 침입방지시스템(IPS : Intrusion Preventing System), 침입탐지시스템(IDS : Intrusion Detecting System), 취약성 분석시스템(VAS : Vulnerability Analysis System) 등 통신 보안대책이다.<BR>  이러한 보안대책도 중요하지만 평소에 컴퓨터 장비에 대한 예방정비, 컴퓨터시설에 대한 주기적인 점검, 컴퓨터시스템의 작동에 대한 재검토, 최신프로그램으로 보안 패치, 방화벽 구축 등 사전예방활동이 무엇보다도 중요하다는 것을 잊어서는 안 될 것이다.   Many people use computers nowadays. Therefore, the importance of computers is increasing but keeping the security of computer is getting difficult. At this point, countermeasures for the security problems of computers are important issues. Although the level of recognition about the computer security problems is getting better, there are still so many corporations which are not using computer virus vaccines and fire wall. Therefore, the damages caused by virus and hacking are increasing.<BR>  In this study, I present the countermeasures for the computer security problems by classifying into three parts - physical security system, technical security system and communication security system.<BR>  Physical security system - Establishing alarm & lighting system on computer equipments; access control to the computer equipments by asking for identification etc.<BR>  Technical security system - Building a back-up system to prevent data loss while computer operation fails.<BR>  Communication security system - Intrusion Preventing System(IPS), Intrusion Detecting System(IDS), Vulnerability Analysis System(VAS) etc.<BR>  Although these security countermeasures are important, the regular check-ups on the security problems of computers are more important. For example, the reexamination of the computer operation, up-dating of the security patch files, and constructing a fire wall etc. should be considered in the regular check-up.

Design of Remote Monitoring and Evaluation System for UPS Battery Performance

Chunjie Hou,Jiabin Wang,Chun Gao 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.5

For the case of each unit battery status parameter of UPS is unpredictable, this paper develops a remote monitoring system, through the connection of local monitoring software and remote monitoring software, interacting database and human-computer to complete this system. Practice has proved that this system can secure stable operation and better meet the requirements of the UPS battery remote monitoring technology.