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MPLS 시스템에서 트래픽 엔지니어링 확장을 고려한 IS-IS 라우팅 프로토콜 (An IS-IS Routing Protocol with Traffic Engineering Extensions in MPLS System)

  • 양미정;박혜경;함진호;김상하
    • 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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    • 제10권5호
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    • pp.365-374
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    • 2004
  • 본 논문에서는 IP 라우팅을 위한 IS-IS 라우팅 프로토콜의 설계 및 구현 방법에 관하여 제시하고자 한다. IS-IS는 대표적인 링크 상태 라우팅 프로토콜 중 하나로 확장성 및 운용의 용이성 등으로 인해 최근 백본 망 및 대형 사업자 망에서 적용 범위를 넓히고 있는 라우팅 프로토콜이다. 따라서, 백본망으로 사용되는 MPLS 시스템에서의 IS-IS 라우팅 프로토콜의 구현 기술은 중요한 요소가 된다 특히, MPLS 시스템에서 품질 보장형 서비스를 제공하기 위해서는 확장 IS-IS 프로토콜에서의 망의 상태 정보 및 가용 자원 정보의 전달이 선행되어야 한다. 따라서, 본 논문에서는 IP 라우팅을 위한 IS-IS 라우팅 프로토콜 및 트래픽 엔지니어링을 위한 확장 IS-IS 라우팅 프로토콜의 설계 및 ATM 기반 MPLS 시스템에서의 구현 기술을 제시하고자 한다.

TICN 전술백본망을 위한 IS-IS 프로토콜 성능 개선 (Improvement of IS-IS Protocol for TICN Tactical Backbone)

  • 권태욱
    • 한국통신학회논문지
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    • 제36권8B호
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    • pp.996-1002
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    • 2011
  • 한국 육군은 차기 전술통신망언 TICN을 개발 및 구축하고 있는데 전술통신망에서 백본망의 기능은 배우 중요한 역할을 수행하게 될 것이다. 따라서 백본망을 지원하게 될 표준 백본 라우팅 프로토콜의 성능을 비교/분석하는 것은 매우 중요한 요소이며, 본 연구실에서는 가장 대표적인 백본 라우팅 프로토콜인 OSPF와 IS-IS 프로토콜의 성능 분석 및 비교를 통하여 IS-IS 프로토콜이 향후 TICN 백본망 라우팅 프로토콜로 적합하다는 연구를 실시하였고, 본 연구는 이전 연구에 계속하여 TICN 백본망 지원을 위한 IS-IS 프로토콜의 몇몇 프로토롤 변수들의 값을 실험을 통하여 분석하였다.

IS-801을 이용한 IDGPS의 성능향상 방법 연구 (The Study for Improving Performance in IDGPS using IS-801)

  • 현문필;김현수;지규인;김병수;김학렬
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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    • pp.63-63
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    • 2000
  • This paper is about the method to improve the IDGPS system using receiver which is not aligned to GPS time. Transmitted data between server and user is constructed in PDDM of IS-801 rule. Pseudorange is overflowed in case of using receiver unaligned GPS time. And satellite position is miscalculated because earth rotating effect is not corrected. To solve this problem, when Pseudorange measurement is over the maximum range, the Pseudorange measurement is reset. And after the rough user position and transmit time is calculated, the precise Pseudorange measurement is calculated.

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대추가루를 첨가한 대추인절미의 관능적, 이화학적 특성과 저장성 연구 (Sensory and Physicochemical characteristics and Storage time of Daechu-Injeulmi added with various levels of jujube powder)

  • 차경희;심영현;이효지
    • 한국식품조리과학회지
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    • 제16권6호
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    • pp.609-621
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    • 2000
  • The purpose of this study was to investigate the effect of addition of jujube on lnjeulmi in storage. Jujube powder was added to lnjeulmi made from the steamed glutinous rice, glutinous rice flour and brown glutinous rice flour. As a result of the sensory evaluation, the more jujube is added, the stronger sweetness and the more bitterness is shown. The sweetness and bitterness, made from brown glutinous rice, of Deachu-Injeulmi added jujube powder is the highest, and the more jujubes are tasted. Tenderness and moistness of Deachu-Injeulmi is decreased in the order of Deachu-Injeulmi made from glutinous rice, brown glutinous rice, glutinous rice flour, tenderness and moistness is increased with less amount of jujube. Chewiness of Deachu-Injeulmi made brown glutinous rice flour is the highest and Deachu-Injeulmi made from glutinous rice is the most rough. Moisture content is decreased in the order of Daechu-Injeulmi from glutinous rice, glutinous rice flour, brown glutinous rice flour. The reducing sugar content about storage period of Daechu-Injeulmi is decreased in the order of glutinous rice, glutinous rice flour, brown glutinous rice flour, and it is dramatically reduced until 48 hours of storage. However, it is increased a little bit after 72 hours. The changes in degree of gelatinization by storage period is that it is rapidly reduced until 24 hours, and it is decreased in the order of glutinous rice, glutinous rice flour, brown glutinous rice flour. That is to say, the more jujube powder is added, the less change there is. Springiness and cohesiveness is decreased during storage. Chewiness and gumminess is higher with more jujube, and it is increased until 24hour of storage period, then it is decreased after 48 hours. Hardness of Daechu-Injeulmi made from glutinous rice flour is the highest and the more jujube is added. Hardness of Daechu-Injeulmi added jujube powder is decreased in the order of Daechu-Injeulmi of 2.5%, 10% and 7.5%. The more jujube is added, the less change of the hardness by the storage period Daechu-Injeulmi is observed, thus the speed of the retrogradation is getting slower.

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하악 부분 무치악 환자의 골유착성 임플랜트 주위 연조직에 관한 연구 (The study of the peri-inplant soft tissue around osseointegrated implants in partial edentulous patients)

  • 정근식;임성빈;정진형
    • Journal of Periodontal and Implant Science
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    • 제27권3호
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    • pp.561-573
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    • 1997
  • The keratinized mucosa around the implant is an important key in health of soft tissue and hard tissue. The purpose of this study is showed that the keratinized mucosa is associated with the keratinized mucosa index, plaque index, gingival index, probing depth. which is investigated to observing the peri-implant mucosa of mandibular partial edentulous patuent using periodontal parameter by previously published paper. It was estimated 6 site with regard to 80 fixture for 28 person, and the average age is 46.8. Each estimation is the order of less trauma, that is, plaque index, keratinized mucosa index, gingival index and probing depth. In this study, statstically analyzed treatment is used for Spss V 7.0 for Windows(Spss Inc, USA). The Kruskal Walis Test is used to compare the amount of the keratinized mucosa is into the $0{\sim}3$ index, with plaque index, gingival index and probing depth. Mann-whitney Test is used to interpreate the relation of plaque index and probing depth, which is showed significant difference. The Result are as follows 1. The kertinized mucosa index 3 amounts to 47.7%, which is much higher than the other indices and the index order is followed 3, 1, 2 and O. 2. The plaque index 1 amounts to 61.7%, which is much higher than the other indices and the index order is followed 1, 2, 3 and O. The plaque index 0 is significant to each of index(P<0.05). The plaque index is decrease as the keratinized mucosa index is increased. 3. The probing depth for 2mm, 1mm, 3mm is 48.9%, 23.5%, 16.8% respectively, which is most occupied. The probing depth 2mm and 3mm for the keratinized mucosa index is significant(P<0.05). The probing index is decreased as the keratinized mucosa index is increased. 4. The gingival index 0 amounts to 58.0%, which is much higher than the other indices and the index order is followed 0, 1, 2 and 3.

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IS 실무자의 지식 및 기술 필요: IS 실무자, 채용 담당자, 교수, 학생 간의 인식 차에 대한 비교 연구 (Knowledge and Skill Requisites on IS Practitioners: A Comparative Study on the Perception Discrepancy Among Practitioners, Recruiters, Professors, and Students)

  • 고석하
    • 경영정보학연구
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    • 제12권2호
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    • pp.205-223
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    • 2010
  • 본 논문에서는 교수와 학생들에게 '신규 IS 실무자들이 그들의 직무를 성공적으로 수행하기 위해서 각 IS 지식과 소프트웨어/IT 전문 기술을 얼마나 필요로 할 것인가'에 대해 설문 조사를 시행하고, 그 결과를 IS 지식과 소프트웨어/IT 전문 기술의 필요성에 대한 IS 실무자들과 IS 실무자 채용 담당자들의 인식과 비교하였다. 분석 결과는 학생과 교수는 매우 유사한, 그리고 다른 집단과는 뚜렷이 구별되는 인식을 공유하고 있다는 것을 보여 준다. 분석 결과는 또한 두 집단 모두 여러 유형의 지식과 기술 간의 중요도의 차이를 뚜렷이 인식하고 있지 못하며, 과거의 MIS 환경에서, 시스템 운영과 소규모의 개발 및 보수유지 업무를 주로 하던 전산요원에 가까운 인식을 갖고 있다는 것을 보여준다. 분석 결과는 이러한 점이 최근의 전문화된 대규모 프로젝트 환경 하에서 작업할 수 있는 소프트웨어 개발 전문가의 육성과 한국 소프트웨어 산업의 발전을 저해하는 가장 중요한 요인 중의 하나라는 것을 시사한다.

IS Quality, Practical Use and Performance in Public Sector

  • Lee, Young-Hee;Kim, Gi-Baek;Lee, Jun-Young;Lee, Jung-Woo
    • 한국경영정보학회:학술대회논문집
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    • 한국경영정보학회 2007년도 International Conference
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    • pp.851-856
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    • 2007
  • Continuously monitoring and improving information system (IS) performance is a major concern in organizations. Thanks to invisible characteristics of IS performance, this is still enduring research question. The purpose of this study is to examine and analyze factors influencing IS Performance in public sector. Influencing factors of IS performance include IS quality such as System Quality, Information Quality and IS Use. The data for analysis was collected from local official in Korea. We used PLS 3.00 Version for an analysis. Analysis revealed that Information Quality has directly influenced IS Use. But there were not Significant in relations between System Quality and IS Performance, System Quality and IS Use, System Quality and IS Performance, and IS Use and IS Performance.

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IS 실무자에 대한 IS 지식 및 기술 수요: IS 실무자와 채용 담당자의 인식에 대한 비교 연구 (IS Knowledge and Skills Requisite on IS Practitioners : Comparative Study of IS Practitioners' Perception and Recruiters' Perception)

  • 고석하;이현우
    • 한국산업정보학회:학술대회논문집
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    • 한국산업정보학회 2008년도 추계 공동 국제학술대회
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    • pp.255-268
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    • 2008
  • 본 논문에서는 IS 채용 담당자들이 한국의 신규 IS 실무자들에게 어느 IS 지식과 소프트웨어/IT 전문 기술이 얼마나 필요하다고 생각하는지에 대해서 실증조사를 하였다. 본 연구에서는 선행 연구 결과에 따라서 IS 실무자들을 초급 전문가, 중급 전문가, 고급 전문가, 그리고 제너럴리스트로 분류하였으며, 조사 결과를 이들 각 집단이 필요로 하는 수준과 비교하였다. 분석 결과는 한국의 IS 채용 담당자들이 IS 채용 담당자들이 전체적으로는 IS 실무자들에게 어떤 지식 및 전문 기술이 필요한지를 잘 파악하고 있으며, 또한 조직의 지식 및 지술 수요에 필요에 민감하게 반응하고 있다는 것을 보여준다. 분석 결과는 또한 IS 채용 담당자들이 기존의 초급 전문가에게 요구되고 있는 정도보다도 더 높은 수준의 "제품-지향성"을 신규 IS 실무자에게 요구하고 있으며, 도리어 중급 전문가에 더 가까운 지식 및 기술 구성을 갖고 있기를 신규 IS 실무자에게 기대하는 사람의 비율이 더 높다는 것을 보여준다. 분석 결과는 한국의 대학이 산업 지식 및 기술 수요에 맞추어 인력을 양성하고 있지 못하며, 이에 대한 추가적인 연구가 필요하다는 것을 시사한다.

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정보시스템의 특성과 분산형태와의 관계에 관한 연구 (A Study of the Relationship Between the IS Characteristics and the Distribution of IS)

  • 김성근;허주병
    • Asia pacific journal of information systems
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    • 제1권1호
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    • pp.5-16
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    • 1991
  • Business firms have been expressing a strong interest in an effective structure of computing resources. In this respect previous studies provide some guidelines about the deployment of hardware, but the question of which information systems (IS) would be run under the dispersed hardware is still unanswered. The main purpose of the study is to analyze the relationship between various IS characteristics and the distribution of IS. The IS characteristics studied in this research include the usage frequency of IS in a dispersed plant, the currency of information required by the headquarter, the data volume processed in the plant, the relatedness of IS with other information systems in the plant. The survey was performed over the domestic, large manufacturing firms. The most noticeable finding is that the more the updated information is required in the headquarter, or the more related IS is to other information systems in the plant, the more IS is distributed.

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The alternative Method to Finish Modular Exponentiation and Point Multiplication Processes

  • Somsuk, Kritsanapong
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제15권7호
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    • pp.2610-2630
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    • 2021
  • The aim of this paper is to propose the alternative algorithm to finish the process in public key cryptography. In general, the proposed method can be selected to finish both of modular exponentiation and point multiplication. Although this method is not the best method in all cases, it may be the most efficient method when the condition responds well to this approach. Assuming that the binary system of the exponent or the multiplier is considered and it is divided into groups, the binary system is in excellent condition when the number of groups is small. Each group is generated from a number of 0 that is adjacent to each other. The main idea behind the proposed method is to convert the exponent or the multiplier as the subtraction between two integers. For these integers, it is impossible that the bit which is equal to 1 will be assigned in the same position. The experiment is split into two sections. The first section is an experiment to examine the modular exponentiation. The results demonstrate that the cost of completing the modular multiplication is decreased if the number of groups is very small. In tables 7 - 9, four modular multiplications are required when there is one group, although number of bits which are equal to 0 in each table is different. The second component is the experiment to examine the point multiplication process in Elliptic Curves Cryptography. The findings demonstrate that if the number of groups is small, the costs to compute point additions are low. In tables 10 - 12, assigning one group is appeared, number of point addition is one when the multiplier of a point is an even number. However, three-point additions are required when the multiplier is an odd number. As a result, the proposed method is an alternative way that should be used when the number of groups is minimal in order to save the costs.