• Title/Summary/Keyword: Limitations

Search Result 11,819, Processing Time 0.034 seconds

The limitations and Alternatives of Geographical Innovation Cluster : Virtual Innovation Coster Perspective (지리적 혁신클러스터의 한계와 보완방안 : 가상 혁신클러스터 관점에서)

  • Kim, Wang-Dong
    • Journal of Korea Technology Innovation Society
    • /
    • v.10 no.4
    • /
    • pp.808-841
    • /
    • 2007
  • Recently some researchers started to discuss the fundamental limitations of geographical innovation clusters. With the rapid development of information and telecommunication technologies, a new concept of virtual innovation cluster is emerging in the advanced countries an alternative to overcome the limitations of geographical clusters. In this context, this study is designed as a pilot study to verify limitations of and issues with geographical innovation cluster through a survey and review the possible application of virtual innovation cluster as an alternative to geographical innovation cluster. Topics covered in this study include; 1) What are the limitations and/or issues with geographical clusters? 2) Can these limitations of and issues with geographical innovation cluster be overcome with virtual innovation cluster? 3) What is the government policy direction to ensure effective utilization of virtual innovation clusters? To answer these questions, this study adopted various research techniques including literature reviews, surveys, case studies, and expert interviews. Especially, a survey was conducted to diagnose the limitations of geographical innovation cluster policy and to understand the possibility of applying virtual innovation clusters. Finally, the significances and limitations of the study are discussed.

  • PDF

Establishment of Rotor Speed Operating Limitation for Medium Class Utility Rotorcraft (중형 기동 회전익기 로터회전수 제한 수립)

  • Park, Jonghoo
    • Journal of the Korean Society for Aviation and Aeronautics
    • /
    • v.21 no.2
    • /
    • pp.26-32
    • /
    • 2013
  • The rotorcraft makes lift and control forces by the rotor thrust. At the development phase of the rotorcraft, the operational limitations have to be established. And it shall be demonstrated to operate the rotorcraft safely within the limitations. This paper introduces establishment and evaluation results of operational rotor speed limitations for the medium class utility rotorcraft. And it shows the follow-up activities after design changes of rotor speed indicators and aural warning systems for implementing the rotor speed limitations.

Analysis of Limitations on Human Reliability Analysis in Nuclear Power Plants and Development of Requirements for an Advanced Method (원자력발전소 인간신뢰도 분석의 한계점 분석과 차세대 방법을 위한 요건 개발)

  • 정원대;김재환;장승철;하재주
    • Journal of the Korean Society of Safety
    • /
    • v.14 no.2
    • /
    • pp.178-191
    • /
    • 1999
  • More than twenty methods were suggested for Human Reliability Analysis (HRA) in the field of safety analysis for Nuclear Power Plants (NPPs). However, there is still a high uncertainty on the analysis and a difficulty in performing HRA. New methods and approaches are under studying to overcome such limitations of current HRA. This paper presents some results of study to analysis limitations of current HRA in viewpoint of user, i.e., HRA analyst. The limitation analysis was based on 89 human error events modeled in a Probabilistic Safety Assessment (PSA) project for NPPs in Korea. Total 17 specific limitations were identified and categorized into seven groups. Important analysis has also been undertaken to assess the order of priority among those limitations. Finally, seven requirements with priority ranking were generated for an advanced framework and methodology of HRA.

  • PDF

Data mining and Copyright

  • Kim, Kyungsuk
    • International Journal of Internet, Broadcasting and Communication
    • /
    • v.14 no.4
    • /
    • pp.11-19
    • /
    • 2022
  • Data mining has broad applications that reach beyond scholarly and scientific research and provide internet search engine services that are commonly used forms of Text and Data Mining('TDM') of websites. The exceptions and limitations for data mining provide a competitive advantage in the global race for policy innovation because it permits researchers to conduct computational analysis - TDM on any materials to which they have access. For this purpose, Japan and the EU added limitations on copyright to legalize some TDM research through amendments to copyright law, and the U.S. copyright law has allowed data mining by the fair use provision. On the other hand, there are no explicit exceptions and limitations for data mining under the Korean Copyright Act, and there are no cases considering data mining fair use. We review comparatively exceptions and limitations on copyright which will help to encourage AI-related business by using more data smoothly through the mining process and extracting more valuable information.

Comparisons of personal characteristics in noninstitutionalized elders with activity limitations (기능장애 노인의 도우미 유무에 따른 특성 비교)

  • Kim Jung-Hee
    • Journal of Korean Public Health Nursing
    • /
    • v.13 no.1
    • /
    • pp.25-40
    • /
    • 1999
  • This study was to identify various personal characteristics between those having a helper and those not having a helper for ADL and IADL performance in noninstitutionalized elders. Secondary analysis was done with the data collected in 1994 national survey of aged householders. Of the elders with ADL limitations $47.8\%$ had no helper. while $26.2\%$ of those with IADL limitations had no helper. Those elders with a helper experienced more limitations in ADL and in IADL than those with no helper. Most of the helpers were family members. whereas very few had a formal helper. Age period and subjective economic status were significantly different between the groups with a helper and with no helper for both ADL and IADL. Compared to the elders with a helper. those elders with no helper had fewer children living together. whereas they had more grandchildren. They also had more contacts with friends or neighbors. Health status. in general. was worse in those elders with a helper than those with no helper. Logistic regression analysis revealed that ADL and IADL limitations had largest influence on having an ADL helper. The odds ratios for low levels of subjective economic status were very high. As for having an IADL helper. IADL score was the most important predictor. In particular. ADL limitations had a negative effect on having an IADL helper. This finding may indicate the urgency of ADL needs. which leads to the lack of an IADL helper when both ADL and IADL limitations are present. Considering the nature of ADL. those disabled elders with low economic status need public support for their daily activities and for home visiting nursing services. There should be studies of examining the adequacy of help in satisfying basic needs for performing ADL and IADL in elders.

  • PDF

A Study on the Provision of the Copyright Limitations for Libraries of the Korean Copyright Act (우리나라 저작권법의 도서관관련 권리제한 규정에 관한 연구)

  • Kim, Jong-Chul;Kim, Young-Seok
    • Journal of Korean Library and Information Science Society
    • /
    • v.43 no.1
    • /
    • pp.349-369
    • /
    • 2012
  • This study aims to examine the problems of the Article 31 of the Korean Copyright Act and to suggest the improvement of the Article 31. The study analysed the establishment and revisions of the Act and the Article 31. The study suggests the followings for the improvement of the Article 31: firstly, to limit copyright limitations for libraries operated by profit organizations but to extend copyright limitations for libraries operated by non-profit organizations, secondly, to abolish the system of property rights compensation, thirdly, copyright organizations and library associations closely discuss to solve the problems on reproduction prevention measures, the amount of reproduction, the inter-library loan of library materials among libraries.

Practical Limitations of Theoretical Acceptance Sampling (이론 샘플링 검사의 실무적 한계)

  • Choe, Seong-Un
    • Proceedings of the Safety Management and Science Conference
    • /
    • 2011.11a
    • /
    • pp.205-211
    • /
    • 2011
  • The papaer reviews four theoretical acceptance sampling plans as OC(Operating Characteristics) curve based inspection, rectifying inspection, switching inspection, and continuous inspection. In addition, the study presents practical limitations of theoretical acceptance sampling by attribute and by variable. Finally, following research also recommends the sampling inspection based on production technology. However, the inspection method requires quality expertise with various experience and implicit knowledge of the field.

  • PDF

Failure recoverability by exploiting kinematic redundancy

  • Park, Jonghoon;Chung, Wan-Kyun;Youm, Youngil
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 1996.10a
    • /
    • pp.77-82
    • /
    • 1996
  • This paper is concerned with how to utilize kinematic redundancy to reconstruct the inverse kinematic solution which is not attainable due to hardware limitations. By analyzing the error due to hardware limitations, we are to show that the recoverability of limitation reduces to the solvability of a reconstruction equation under the feasibility condition. It will be next shown that the reconstruction equation is solvable if the configuration is not a joint-limit singularity. The reconstruction method will be proposed based on the geometrical analysis of recoverability of hardware limitations. The method has the feature that no task motion error is induced by the hardware limitations while minimizing a possible null motion error, under the recoverability assumed.

  • PDF

A Study on the Meaning and Limitations of Architectural Phenomenology of Norberg-Schulz (노르베르크-슐츠의 건축 현상학이 갖는 의의와 한계)

  • Chung, Tae-Yong
    • Korean Institute of Interior Design Journal
    • /
    • v.25 no.6
    • /
    • pp.89-97
    • /
    • 2016
  • The aim of this study is to review Norberg-Schulz's architectural phenomenology to find out its meaning and limitations in contemporary architecture. His phenomenological trilogy, 'Existence, Space and Architecture', 'Genius Loci' and 'The Concept of Dwelling' are main texts to examine background, characteristics, meaning and limitations of his theory in relation to Structuralism and Heidegger's thoughts. Heidegger's phenomenology, especially his dwelling concept, had great impacts on forming Norberg-Schulz's architectural phenomenology. However, since his architectural phenomenology was strongly influenced by Structuralism, his theories present unstable combination of phenomenology and semiotics. And this results in instrumentalization, and overlooking body movement and socio-economical elements in his theory. In spite of these limitations, his theory also shows possibility to go beyond the theory of Modern architecture and plays important role in suggesting direction for better environment through applicability from single building to city in Postmodern architecture. Another meaning of his theory lies in presenting theoretical background for new way to interpret regionalism and specific policy tool to make town planning in Finland.

Lee Sang′s Accusation and Poetic Transformation : On the Limitations of Language Signals (언어기호의 한계성에 대한 이상의 고발과 시적 변용)

  • 오정란
    • Lingua Humanitatis
    • /
    • v.1 no.2
    • /
    • pp.21-46
    • /
    • 2001
  • No one would deny that, despite the fact that they are the central factor in any given communication system, language signals have their limitations. For example, language cannot keep up with the radical changes that occur in the world and its ideas. The present meaning of a language signal is always pegged to the past when it was originally created. This limitation in turn puts limitations on the way we conceive of the world, and we have no choice but to watch the world through the refracted, darkly colored lens called language. Lee Sang′s was well aware of these limitations, and his works reflect his suspicion of language. This paper argues that Lee Sang′s "Ogamdo 1" is a poetic commentary on the ambiguity of language signals; that "Ogamdo 2" is an accusation of the stationary nature of language signals; ; and, finally, that "Sune-kwanhan-gakseo (Treatise on Lines) 7" is a poetic expression of Lee Sang′s negative view of the symbolic limitation of, and the fragmentary nature of, language signals.

  • PDF