• Proceedings of the Korea Multimedia Society Conference
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• 1998.04a
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• pp.417-422
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• 1998

동적 웹 컨텐트(dynamic web content)를 생성하는 CGI 애플리캐이션은 사용시 웹 서버의 자원을 필요로 하기 때문에 서비스를 요청하는 클라이언트의 수가 많을수록 프로세스의 크기 및 프로세스 관리 부담이 가중되어 전체 시스템의 성능이 저하되는 단점이 있다. 본 논문에서는 CGI가 갖는 프로세스 생성 및 관리비용을 최소화하고, 캐슁을 이용하여 성능을 향상시킬 수 있는 CGI 애플리캐이션 구조를 제안하였다. 그리고 제안한 CGI 방식의 성능 분석 결과, 제안한 방식이 기존의 CGI 방식보다 빠른 응답시간과 메모리를 효율적으로 사용하여 다중 사용자 환경에서 더 우수한 결과를 나타내었다.

• Journal of Microbiology and Biotechnology
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• v.33 no.2
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• pp.242-250
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• 2023

Comparative gene identification-58 (CGI-58) is an activating protein of triacylglycerol (TAG) lipase. It has a variety of catalytic activities whereby it may play different roles in diverse organisms. In this study, a homolog of CGI-58 in Phaeodactylum tricornutum (PtCGI-58) was identified. PtCGI-58 was localized in mitochondria by GFP fusion protein analysis, which is different from the reported subcellular localization of CGI-58 in animals and plants. Respectively, PtCGI-58 overexpression resulted in increased neutral lipid content and TAG accumulation by 42-46% and 21-32%. Likewise, it also increased the relative content of eicosapentaenoic acid (EPA), and in particular, the EPA content in TAGs almost doubled. Transcript levels of genes involved in de novo fatty acid synthesis and mitochondrial β-oxidation were significantly upregulated in PtCGI-58 overexpression strains compared with wild-type cells. Our findings suggest that PtCGI-58 may mediate the breakdown of lipids in mitochondria and the recycling of acyl chains derived from mitochondrial β-oxidation into TAG biosynthesis. Moreover, this study potentially illuminates new functions for CGI-58 in lipid homeostasis and provides a strategy to enrich EPA in algal TAGs.

• The Transactions of the Korea Information Processing Society
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• v.6 no.8
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• pp.1989-1999
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• 1999

Many people are the latest interested in the integration of the WWW and database systems. The UCM(United CGI Management) system, which is proposed on this study, is based on the method using CGI that does not change existing servers and clients to integrate the WWW and database system. Since the CGI executable architecture executes a CGI program whenever the database is accessed, the system performance is reduced greatly when many request to the database are made simultaneously. However, the UCM system improves the system performance since it uses the integrated CGI running a daemon process. Moreover, the proposed system can use the WWW database more economically and doesn't use the SQL because it does not use a DBMS. In UCM system, we define the extended HTML tags to implement the WWW database interface and use the EXODUS storage manager for accessing the database.

• Journal of KIISE:Computing Practices and Letters
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• v.10 no.1
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• pp.66-74
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• 2004

To get changing data or retrieved information in a web service environment, we need the CGI method in which we designate an executable file and receive the output of the executable file as a document. But the original CGI method has some performance pitfalls caused by the native condition that a process for the requested executable file should be created every time it is requested. Several approaches that make the process as a daemon wholly or partly have been made to solve those problems and they have exclusive strength and weakness. So, many developers are confused when they have to choose which of the CGI methods. We proposed an efficient CGI gateway design called SendFD that the main part of CGI gateway was separated as a daemon and taken over the communication channel by the other small part forked whenever it was requested. Then we testified the efficiency of SendFD styled CGI gateway in real web service environment and it showed about 3% performance improvement compared to the conventional socket pipe method.

• Journal of Elementary Mathematics Education in Korea
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• v.10 no.2
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• pp.127-150
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• 2006

The purpose of this study is to apply the principles of CGI(Cognitively Guided Instruction) into mathematics class in Korean elementary schools and to explore which mathematical concepts Korean students have and how they use informal knowledge and procedures to solve problems. In addition, this study tries to analyze difficulties that teachers might face when they are planning mathematics teachings based on CGI. The conclusions of this study are followings: First, the mathematics teaching based on CGI provides opportunity for students to communicate about mathematical knowledge that they know, The students are sure of their thoughts and learn from others by presentation. Second, the mathematics teaching based on CGI make students think mathematically. The students try to understand the meaning of problems and find various ways. Third, teachers should lead appropriate environment for the mathematics teaching based on CGI. They should offer proper problems and encourage their students to ask and answer questions respectively.

• Proceedings of the Korean Nuclear Society Conference
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• 1997.10a
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• pp.239-243
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• 1997

상용기기(Commercial Grade Item CGI)란 구조물, 시스템, 콤포넌트 또는 그것들의 일부분을 구성하는 것으로써 안전기능(safety function)에 영향을 미치지만 basic component로써 설계되거나 제작되지 아니한 것을 의미한다 즉, ASME/NQA-1 Appendix B의 엄격한 품질보증 프로그램 하에서 설계되고 제작되지 아니한 것으로써 원전 이외의 분야에서 상용적으로 널리 사용되고 있는 기기들을 의미한다. 본 논문에서는 이러한 원전 안전등급 분류기준 Non-Nuclear System(NNS) Simple에 해당되는 Non-Safety CGI를 Safety Application의 Nuclear Grade Item으로 사용하기 위한 CGI 평가 및 승인 절차를 제안하고 새로운 CGI 생명주기 모델을 제시하였다. 본 논문에서 제시한 CGI Dedication 절차 및 CGI 생명주기 모델은 우리나라 원전 계측제어계통의 디지털 upgrade plan 및 교체, 신규원전 상용기기 평가방법론에 적용할 수 있을 것이다. CGI Dedication은 10여년전부터 원자력계가 고민해온 분야로써 원전 계측제어계통의 디지털화에 따라 상용 (Commercial Off The Shelf : COTS) 소프트웨어의 승인과 함께 전세계적으로 hot issue가 될 만큼 활발한 연구와 논의가 현재 진행되고 있는 분야이다.

• The Transactions of the Korea Information Processing Society
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• v.6 no.3
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• pp.641-653
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• 1999

The paper is design and implementation of the system to support security communication between a Web Browser and a CGI program by a Web Server using PKI(Public Key Infrastructure. This system uses GSS(Generic Security Service)-API to communicate with PKI, offers a Web user a Client Proxy, and offers a CGI developer there library functions related with security. TLS(Transport Layer Security) supports security communication between a Web Browser and a Web Server, but the system supports security communication between a Web Browser and a CGI program as the protected data received from a Client Proxy are sent to a CGI program, and the CGI program decrypts the data using the library functions supported by this system.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.1831-1832
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• 2007

WWW(World Wide Web)의 개발 이래 내 컴퓨터 안에만 존재하는 워드와 한글 등의 문서들은 네트워크를 타고 지구 어딘가에 있는 누군가의 모니터에 디스플레이되고 있다. 그러나 컴퓨터 기술은 이와 같은 단순한 HTML파일을 보여주기보다 방명록이나 동영상처럼 동적으로, 실시간으로 정보를 보여주는 수준으로 진화해야 했다. 이러한 기술을 처음으로 가능하게 한 것이 CGI 기술이다. 초기의 CGI 기술은 성능상의 문제로 개발과 발전을 거듭해 현재의 FastCGI나 mod_perl과 같은 기술이 제안되었다. 그러나 FastCGI나 mod_perl도 아직은 동적 정보를 제공하는 완벽한 기술은 아니며 각각 장단점을 지니고 있다. 본 논문에서는 각 기술의 장단점을 살펴보고 이들의 장점을 통합한 개선된 CGI기술을 제안한다.

• Communications of Mathematical Education
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• v.14
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• pp.27-41
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• 2001

인지적으로 안내된 교수(CGI)는 학생들의 수학적 사고(특히, 비형식적 지식)의 발달; 그러한 발달에 영향을 미치는 교수; 교수 실제에 영향을 미치는 교사의 지식과 신념들; 교사의 지식, 신념들, 실제들이 학생들의 수학적 사고에 대한 이해에 의해 영향을 받는다는 점에 초점을 둔 통합된 연구 프로그램이다. 본 논문에서는 아동의 비형식적인 지식을 중시하는 최근의 연구들을 고찰하고, CGI를 위한 수업을 어떻게 조직하며, 그러한 교수법이 수업을 어떻게 진행할 것인지에 대한 구체적이고 명확한 지침을 제공하지 않으므로 CGI를 적용하는 교실들의 유사점을 살펴본다. 그리고, 마지막으로 최근의 연구들을 고찰함으로써 CGI의 효과를 알아본다.

• Journal of the Korean Society of Radiology
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• v.11 no.5
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• pp.303-312
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• 2017

The central goal of Gamma Knife radiosurgery(GKRS) is to maximize the conformity of the prescription isodose surface, and to minimize the radiation effect of the normal tissue surrounding the target volume. There are the various kinds of indices related with the quality of treatment plans such as conformity index, coverage, selectivity, beam-on time, gradient index(GI), and conformity/gradient index(CGI). As the best treatment plan evaluation tool, we must check by all means conformity index, GI, and CGI among them. Specially, GI and CGI related with complication of healthy normal tissue is more indispensible than conformity index. Then author calculated and statistically analysed CGI, the newly defined conformity/gradient index as well as GI being applied widely using the treatment planning system Leksell GammaPlan(LGP) and the verification method Variable Ellipsoid Modeling Technique(VEMT). In the study 10 patients with intracranial lesion treated by GKRS were included. Author computed the indices from LGP and VEMT requiring only four parameters: the prescribed isodose volume, the volume with dose > 30%, the target volume, and the volume of half the prescription isodose. All data were analyzed by paired t-test, which is statistical method used to compare two different measurement techniques. No statistical significance in GI at 10 cases was observed between LGP and VEMT. Differences in GI ranged from -0.14 to 0.01. The newly defined gradient index calculated by two methods LGP and VEMT was not statistically significant either. Author did not find out the statistical difference for the prescribed isodose volume between LGP and VEMT. CGI as the evaluation index for determining the best treatment plan is not significant statistically also. Differences in CGI ranged from -4 to 3. Similarly newly defined Conformity/Gradient index for GKRS was also estimated as the metric for the evaluation of the treatment plans through statistical analysis. Statistical analyses demonstrated that VEMT was in excellent agreement with LGP when considering GI, new gradient index, CGI, and new CGI for evaluating the best plans of GKRS. Due to the application of the fast and easy evaluation tool through LGP and VEMT author hopes CGI and newly defined CGI as well as gradient indices will be widely used.