• Journal of Life Science
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• 제11권1호
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• pp.52-56
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• 2001

The present study intends to characterize the DNA damage-inducible responses in eukaryotic cells. The fission yeast, S. pombe, which displays efficient DNA repair systems, was used in this study as a model system for higher eukaryotes. To study UV-inducible responses in S. pombe, five UV-inducible cDNA clones were isolated from S. pombe by using subtration hybridization method. To investigate the expression of isolated genes, the cellular levels of the transcripts of these genes were determined by Northern blot analysis after UV-irradiation. The transcripts of isolated gene (UV130) increased rapidly and reached maximum accumulation after UV-irradiation. Compared to the message levels of control, the levels of maximal increase were approximately 5 fold to UV-irradiation. In order to investigation whether the increase of UV130 transcripts was a specific results of UV-irradiation, UV130 transcript levels were examined after treating the cells to Methylmethane sulfonate (MMS). The transcripts of UV130 were not induced by treatment of 0.25% MMS. These results implied that the effects of damaging agents are complex and different regulatory pathways exist for the induction of these genes. To characterize the structure of UV130 gene, nucleotide sequences were analyzed. The nucleotide sequence of 1,340 nucleotide excluding poly(A) tail contains one open reading frame, which encodes a protein of 270 amino acids. The predicted amino acid sequences of UV130 do not exhibit any significant similarity to ther known sequences in the database.

• 한국정보처리학회논문지
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• 제7권12호
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• pp.3804-3814
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• 2000

본 논문에서는 실시간 객체 모델인 TMO(Time-triggered Message-triggered Object)에 기반을 둔 실시간 객체지향 프로그램의 시간 제약이 제대로 만족되는가를 시스템 수행 중에 감시하기 위한 모니터의 효과적인 구현 방안에 대하여 논한다. 구현 환경으로 윈도우 OS상의 TMO 프로그램 실행 환경인 WTMOS(Windows TMO System)를 이용하였고, 감시 주체가 되는 수행 시간 모니터의 성능 분석을 위하여 온도 제어를 위한 응용 시스템이 구축되었다. 모니터 대상과 모니터 조건을 TMO 프로그램내에 명시하는 방법과 정의된 모니터의 기능을 WTMOS 내부와 TMO 형태의 응용 객체로 분산시켜서 적은 비용으로 시스템을 구축하는 방법을 제시한다.

• 한국컴퓨터산업학회논문지
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• 제5권9호
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• pp.891-902
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• 2004

멤버쉽의 변화는 그룹키 관리의 확장성 문제와 밀접한 관계가 있다. 그룹의 멤버가 가입하거나 탈퇴하면 새로운 그룹키를 생성하여 그룹의 나머지 모든 멤버들에게 전달되어야 한다. 그룹키의 변경은 그룹 제어기의 주도로 수행된다. 새로운 키를 생성하여 분배하는 멀티캐스트 그룹키 관리에서 제어기와 멤버가 저장하는 키의 수, rekeying할 때마다 제어기가 전달하는 메시지의 수 초기단계에서 제어기에 의해 전달되는 키의 수, 일괄 rekeying시 전달하는 메시지의 수는 그룹 키관리기법을 핑가하는 중요한 기준들이다. 일괄 rekeying은 순차적으로 개별 rekeying하는 것보다 rekeying에 대한 메시지의 수와 연산비용을 줄일 수 있다. 본 논문에서는 난수를 사용하는 Pegueroles의 그룹키 관리기법에 적용할 수 있는 일괄 rekeying 방법을 제안하고, 그 방법이 적용된 Pegueroles기법은 효율적인 그룹키 관리 기법임을 보인다.

• 정보학연구
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• 제4권1호
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• pp.109-124
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• 2001

최근 인터넷을 통한 정보 교환을 위해 XML(eXtensible Markup Language), 이러한 XML과 EDI의 기술적 특성과 장점을 이용한 XML/EDI에 대한 연구가 활발하게 진행되고 있다. EDI의 개념과 더불어 일괄처리 EDI에서부터, 실시간 EDI, 대화형 EDI, 개방형 EDI, 객체지향 EDI, 그리고 인터넷을 이용한 EDI로 발전되는 과정을 살펴보고, 특히 XML/EDI의 발전방향에 대하여 고찰하고자 한다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2000년도 추계학술대회논문집
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• pp.43-51
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• 2000

Since 1996, the document exchange method by EDI has been introduced in port and logistics industries to enhance the declaration activities to the Pusan Port Authority and Customs. In spite of these efforts, users such as shipping companies, shipping agents, and freight forwarders have complained the inconvenience of using EDI systems. The major reasons can be summarized as too much transfer time, inconvenient EDI software, and problems on message receiving confirmation. To solve these problems, although we have developed an Internet based EDI system for Port-MIS users, we have failed its implementation practically for the short of Governments readiness, the complexity of systems and separation with in-house systems. So, the writers have changed the direction of research to applying the concept of SCM to logistics system by XML/EDI. In this Paper, the prototype systems to integrate processes of shipping company, Port Authority, Customs and stevedoring company will be suggested. The new method of EDI gives us advantages, which are the accuracy of cargo data and integration of processes among firms and keeping the service of cargo trace.

• 무역상무연구
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• 제15권
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• pp.89-116
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• 2001

Throughout the history of UCP, the longest lasting operational rules have been those derived from internationally acceptable best practices. I would propose that the effort to establish best practices be undertaken using four tools the SBPED, ISP98, the Opinions of the Banking Commission, and decisional law by respected courts in jurisdictions that influence letter of credit case law in the various regions. The SBPED and the ISP98 should be used; not only as a model for the drafting of future operational rules, but also as a questionnaire on best practices directed to all the national committees. The Opinions of the Banking Commission and the leading cases should be used to verify the soundness and enforceability of proposed rules. For this reason, I would suggest that the revision wait until the dust settles sometime in 2003 (10 years after the enactment of UCP 500) and we know if it is a good idea to attempt the drafting of new operational rules and whether to merge with closely related sets of rules. To do otherwise may entail a revision of the revision while it is still going on, or worse, discarding it before the ink dries or the electronic message reaches its intended recipient.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2004년도 추계 종합학술대회 논문집
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• pp.395-401
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• 2004

In the current high network-centralized computing and enterprising environment, it is getting essential to transmit data reliably at very high rates. Until now previous client/server model based NFS(Network File System) or AFS(Andrew's Files System) have met the various demands but from now couldn't satisfy those of the today's scalable high-performance computing environment. Not only performance but data sharing service redundancy have risen as a serious problem. In case of NFS, the locking issue and cache cause file system to reboot and make problem when it is used simply as ip-take over for H/A service. In case of AFS, it provides file sharing redundancy but it is not possible until the storage supporting redundancy and equipments are prepared. Lustre is an open source based cluster file system developed to meet both demands. Lustre consists of three types of subsystems : MDS(Meta-Data Server) which offers the meta-data services, OST(Objec Storage Targets) which provide file I/O, and Lustre Clients which interact with OST and MDS. These subsystems with message exchanging and pursuing scalable high-performance file system service. In this paper, we compare the transmission speed of gigabytes file between Lustre and NFS on the basis of concurrent users and also present the high availability of the file system by removing more than one OST in operation.

• 한국인공지능학회지
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• 제8권1호
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• pp.11-18
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• 2020

In this paper, it is to identify the effects of differences in interpretation levels depending on the type of brand association and the brain psychological distance on the evaluation of the product of that brand through two experiments. To test our hypotheses empirically, we conducted online survey. We addressed the hypotheses involving the general and relative impact of actual and ideal self-congruence on emotional brand attachment (H1) and explored the effect of product involvement as the moderating variable (H1-1 and H1-2). The goal of this research was to validate the results from involving our basic model and to explore the impact of two additional moderating variables (self-esteem and public self-consciousness: H2). We followed the same procedure. This finding is theoretical to the extent of the interpretation level theory in brand association research by applying the interpretation level theory to the brand association, and provides the meaning that, in practice, it is necessary to utilize the message of different types of brain psychological distance depending on the brand association characteristics that the brand has in defining the brand. In particular, it was confirmed that functional brand associations and symbolic brand annals have representational harmonization, respectively, depending on the low and high levels of interpretation levels.

• 한국멀티미디어학회논문지
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• 제9권12호
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• pp.1542-1551
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• 2006

In the Grid Database, some replicas will have more requests from the clients than others. A fast consistency algorithm has been presented to satisfy the high demand nodes in a shorter period of time. But it has poor performance in multiple regions of high demand for forming the island of locally consistent replicas. Then, a leader election method is proposed, whereas it needs much additional cost for periodic leader election, information storage, and message passing, Also, false leader can be created. In this paper, we propose a tree-based algorithm for replica update propagation. Leader replicas with high demand are considered as the roots of trees which are interconnected. All the other replicas are sorted and considered as nodes of the trees. Once an update occurs at any replica, it need be transmitted to the leader replicas first. Every node that receives the update propagates it to its children in the tree. The update propagation is optimized by cost reduction for fixed propagation schedule. And it is also flexible for the dynamic model in which the demand conditions change with time.

• 정보처리학회논문지C
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• 제14C권7호
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• pp.559-570
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• 2007

본 논문에서는 NSIS(Next Step in Signaling) 시그널링 프로토콜을 기반으로 VPN(Virtual Private Network) QoS(Quality of Service) 서비스 모델인 Hose 모델 자원 준비(Resource Provisioning) 메커니즘에 따라 자원을 예약하고 관리하는 Hose-NSIS-QoSM을 제안한다. 구체적으로 Hose-NSIS-QoSM을 위한 NSIS 메시지 객체(Objects), QoS NSLP(NSIS Signaling Layer Protocol)/NTLP(NSIS Transport Layer Protocol)/RMF(Resource Management Function) 상태 테이블, NSIS 노드에서의 메시지 처리 과정을 정의하였다. 또한, MPLS 네트워크에서의 VPN의 Hose 기반 QoS 서비스 모델을 지원하기 위해 확장된 RSVP-TE(Resource Reservation Protocol-Traffic Engineering)를 이용하는 시그널링 방안인 Hose-RSVP-TE-QoSM과 본 논문에서 제안하는 방안인 Hose-NSIS-QoSM를 비교하였다.