• Title/Summary/Keyword: Distributed architecture

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A Study on QoS Based Resources Management Model for Supporting Multimedia Services (멀티미디어 서비스를 위한 QoS 지원 자원관리 모델 연구)

  • Kung, Sang-Hwan;Yoon, Seok-Hwan;Hwang, Seung-Ku
    • The Transactions of the Korea Information Processing Society
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    • v.4 no.12
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    • pp.2996-3009
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    • 1997
  • A lot of talks on the Quality of services (QoS) so far were limited only either for the network itself or for the end system, But, recently it is becoming more important to have the seamless end-to-end QoS support to meet the networked multimedia service requirements This paper proposes the QoS based resource management architecture which supports the large scale distributed systems under heterogeneous environment. The architecture introduces a couple of key concepts such as abstractions and algorithms. Abstractions capture the three perspectivest found in all systems: application, resource, and system, on the ofter hand algorithms manage system resources based on information in the three abstractions. We also explain the on-line resource management flow as well as the benefit function which specifies the level of benefit accrued to the application user as a function of the level of service provided by the system. At the end of the paper, the QoS based resource management applied to the tele-seminar application is described to show its practical utilization.

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Development of a Personal Robot Considering Standardization

  • Choi, Moo-Sung;Yang, Kwang-Woong;Won, Dae-Heui;Park, Joon-Woo;Park, Sang-Duk;Lee, Ho-Gil
    • 제어로봇시스템학회:학술대회논문집
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    • 2005.06a
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    • pp.2243-2247
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    • 2005
  • If a personal robot is popularized like a personal computer in the future, many kinds of robots will appear and the number of manufacturers will increase as a matter of course. In such circumstances, it can be inefficient, in case each manufacturer makes a whole platform individually. The solutions for this problem are to modularize a robot component (hardware and software) functionally and to standardize each module. Each module is developed and sold by each special maker and an end-product company purchases desired modules and integrates them. The standardization of a module includes the unification of the electrical, mechanical and software interface. In this paper, a few prototypes developed based on the concept of this study are introduced and possibility which can be standard platform is verified. Each prototype has merits and demerits, and a new structure of the hardware platform considered them is proposed Also the software architecture to develop the standardized and modularized platform is introduced and its detailed structure is described. The name of a method and the way to use that are defined dependently on the standard interfaces in order to use a module in other modules. Each module consists of a distributed object and that can be implemented in the random programming language and platform. It is necessary to study on the standardization of a personal robot after this steadily.

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The Architectural Characteristics and the Confucian Order of Jeong-Gak (정각(旌閣)의 건축적(建築的) 특성(特性)과 예적(禮的) 질서(秩序) -전북지방을 중심으로-)

  • Hong, Seung-Jae;Ahn, Seon-Ho
    • Journal of architectural history
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    • v.9 no.3 s.24
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    • pp.37-49
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    • 2000
  • Jeong-Gak is one of the Confucian architecture in Cho-Sun Dynasty. This study is founded on the architectural characteristics and the Confucian order of Jeong-Gak. The Cho-Sun Dynasty had put in operation positive Jeong-Pyo Policy for diffusion Confusion ethics and educate the people. Prize methods of Jeong-Pyo Policy are Jeong-Ryeo, Jeong-moon, remit corvee, present a post and present goods. Jeong-Moon and Jeong-Ryeo is red gate. Vocabularies of Jeong-Moon and Jeong-Ryeo have used mixing but I think that both meaning is different essentially each other. The red gate that elected in front of gate or gateway is Jeong-Moon and another red gate that elected an entrance a village is Jeong-Ryeo. Jeong-Moon and Jeong-Ryeo have no roof, so they are many problem for maintenance and management. Accordingly Jeong-Gak come out from the reign of King Jung-Jong because shelter of Jeong-Moon and Jeong-Ryeo. The function of the Jeong-Gak is shelter of the Jeong-Moon and Jeong-Ryeo, encouragement of Sam-Gang(三綱) ethics, and ostentation of a family. Besides it has a monumental characteristic. It has been distributed the whole country land that Jeong-Gak is closely related with the community of same family (rural community) the latter period of the Cho-Sun Dynasty. The architectural particularity of the Jeong-Gak is brilliance of building materials as compared with different Confucian architecture and appearance of various architectural type. It is that a type of Jeong-Gak appeared Jeong-Ryeo-Gak type, a lofty gate type, and Stone Jeong-Ryeo type. And there are keeping a rule that is to say Confucian order clearly.

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Evaluation of Landslide Susceptibility Using GIS and RS (GIS 및 RS기법을 활용한 산사태 취약성 평가)

  • Kim, Kyung-Tae;Jung, Sung-Gwan;Park, Kyung-Hun;Oh, Jeong-Hak
    • Journal of the Korean Association of Geographic Information Studies
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    • v.8 no.1
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    • pp.75-87
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    • 2005
  • This study aims at predicting and mapping of the landslide susceptibility in the Geumho river watershed using GIS and Remote Sensing techniques. We constructed the spatial database of affecting factors such as slope angle, slope aspect, lithology, landuse, and vegetation index (NDVI) at a $30m{\times}30m$ resolution. The landslide susceptibility of the study area was predicted through overlay analysis and adding up estimation matrix, and the predicted map of landslide susceptibility with six categories (stable, very low, low, moderate, high, very high) was constructed. As the results, it showed that the very high susceptibility zones made up approximately 0.3% of the total study area, and these zones were mainly distributed in the forest area with the high slope angle and low vegetation index.

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Multi Agent System (MAS) Framework for Home Network Application (홈 네트워크 응용을 위한 Multi Agent System (MAS) 프레임워크)

  • Jang, In-Hun;Sim, Kwee-Bo
    • Journal of the Korean Institute of Intelligent Systems
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    • v.17 no.1
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    • pp.80-85
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    • 2007
  • As home network system begins serving in earnest, the recent fruits of research in home service robot show that the new epoch that human and intelligent robots are living, communicating and interacting together at home, may come true in the near future. In the other hand, it is generally known that the multiagent system, performing distributed process together with other different devices in a home network system, is better than single robot or single home server for adapting themselves to home environment and completing their mission because the characteristic of home environment is 'open'. Therefore, in this paper we suggest the framework model to define agents, which is needed lot the home with a home network system, and the communication protocol architecture between agents. For this, we focus our attention on an agent comprising the set of many agent instances rather than the single intelligent or ability of a robot or home server, and also suggest the way of adaptation for agent systems to their environments and interaction with human in the manner of cooperation and negotiation among agents or agent instances in each agent.

RM-ODP Application and Architecture Design for National Integrated Geospatial Portal (지리정보통합포털 구축을 위한 개방형 분산프로세싱 참조모형 적용 및 아키텍처 설계)

  • Shin, Dong-Bin;Park, Si-Young;Jeong, Jin-Seok;Kim, Dong-Han
    • Journal of Korean Society for Geospatial Information Science
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    • v.13 no.4 s.34
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    • pp.75-81
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    • 2005
  • This study intended to show the way of evolving 'National Geographic Information Clearinghouse' to 'National Integrated Geospatial Portal'. For this purpose we have analyzed Geospatial One-Stop Portal in the US and then suggested future model of National Geographic Information Clearinghouse. The Integrated Geospatial Portal model is based on the Reference Model for Open Distributed Processing(RM-ODP) which is an international model for information distribution and sharing. The Integrated Geospatial Portal architecture consists of the data layer, middle-ware, presentation layer. It will help users to determine their fitness for nation wide GIS application and provide tools for accessing, visualizing, or ordering various geospatial data.

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Vascular Plants Distributed in Mt. Danseok District, Gyeongju National Park (경주국립공원 단석산지구에 분포하는 관속식물상)

  • You, Ju Han;Kwon, Soon Young
    • Korean Journal of Plant Resources
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    • v.30 no.5
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    • pp.507-521
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    • 2017
  • This study was carried out to the vascular plants in Mt. Danseok (827 m) District, Gyeongju National Park and provide a basic data for the conservation and management of natural resources. The vascular plants were surveyed from May 2011 to October 2016. The flora on Mt. Danseok District was classified as follows. Based on voucher specimens, the flora of this site consisted of 97 families, 331 genera, 489 species, 4 subspecies, 48 varieties and 11 forms. The 11 taxa of rare plants and 14 taxa of Korean endemic plants were investigated. The specific plants by floristic region found in this site 50 taxa comprising 1 taxa of grade V, 5 taxa of grade VI, 8 taxa of grade III, 12 taxa of grade II and 24 taxa of grade I. The 37 taxa of naturalized plants and 2 taxa of invasive alien plants were investigated.

Vascular Plants of Mt. Manhobong in Mt. Tohamsan District, Gyeongju National Park (경주국립공원 토함산지구 내 만호봉 일대의 관속식물상)

  • You, Ju Han;Kwon, Soon Young
    • Korean Journal of Plant Resources
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    • v.31 no.5
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    • pp.575-589
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    • 2018
  • The purpose of this study is to provide the baseline data for conservation and management of the ecosystem of Gyeongju National Park by surveying and analysing the vascular plants distributed in Mt. Manhongbong (522 m). The vascular plants were surveyed form May 2012 to August 2017. The vascular plants on this site was classified as follow. Based on voucher specimens, the vascular plants of this site consisted of 91 families, 292 genera, 397 species, 4 subspecies, 48 varieties and 8 forms. The 2 taxa of threatened species, 11 taxa of rare plants and 14 taxa of Korean endemic plants were investigated. The specific plants by floristic region were totally 39 taxa, which were 3 taxa of grade V, 5 taxa of grade IV, 2 taxa of grade III, 11 taxa of grade II and 18 taxa of grade I. The naturalized plants were identified as 33 taxa and the percentage of naturalized index (NI) was 7.2%, and urbanized index (UI) was 10.3%, respectively. The invasive alien plants were 2 taxa, such as Ambrosia artemisiifolia L. and Aster pilosus Willd.

An evaluation of stream naturalness for Close-to-nature stream restoration in case of Hakui Stream (학의천을 중심으로 본 자연형 하천복원을 위한 하천자연도 평가)

  • Kim, Dong-Chan;Yoon, Young-Seok;Park, Ik-Su
    • Journal of the Korean Society of Industry Convergence
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    • v.6 no.4
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    • pp.315-324
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    • 2003
  • The purpose of this is to evaluate Hakui Stream Naturalness Index(S.N.I). and to find out stats, problems and opportunities of the Hakui stream by assessment standard. Assessment standard is mainly based on physical structure of stream environment. The purpose evaluating sectors and elements are physical form and structure restoration of stream. To find out assessment standard of stream naturalness index, conceptual frame of assessment standard has been established, for which four sections, for example, longitudinal section, lateral section, stream bottom structure and water environment, have been selected. Overall stream naturalness index of the Hakui stream has been distributed at 3rd to 4th grade, and its assessment index accounted for 3.2 to be 3rd grade, and its mode also did 3rd grade. Stream naturalness index of each section was as follows: Longitudinal section index accounted for 3.6 in average to be 4th grade, and later section index did 3.0 to be 3rd grade, and stream bottom structure index did 3.0 to be 3rd grade, and water environment index did 2.7 to be 3rd grade. Analysis of assessment outcome of stream naturalness index has checked status, Problems and opportunities of corresponding stream. Assessment of stream naturalness index of the study provides useful information for restoration of close-to-nature stream, and furthermore has its meaning in checking problems and opportunities of Hakui stream.

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Three-Dimensional Grillage Analysis of Reaction Forces on Supports of Pre-Erection Block (격자구조모델을 이용한 선체 PE블록의 반목 반력 해석 시스템 개발)

  • Ryu, Cheolho;Kim, Sungchan;Kim, Dong Geun
    • Journal of Ocean Engineering and Technology
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    • v.27 no.4
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    • pp.1-8
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    • 2013
  • Many PE (pre-erection) blocks are supported by wooden, concrete, or steel supports when they are stocked in the outdoor areas of a shipyard. Their positions and numbers are planned on the basis of the workers' experience. Recently, many shipyards have been making PE blocks with various shapes and weight distributions because of the variety of ships and building technologies. Therefore, it is now necessary to deal with blocks that they have no experience with. We propose a method to conveniently and quickly evaluate the structural safety of PE block supports, without the need for special knowledge and technology related to structural analysis. This method can reduce the large number of man hours (MH) normally needed for the analysis. The three-dimensional grillage analysis is performed for a simplified grillage model of a PE block. For efficiency, the grillage model of the PE block is automatically built from its three-dimensional CAD model, and its weight is also automatically distributed on the grillage model. The integrated system has been comprehensively implemented to perform the grillage analysis for the reaction forces on block supports. This paper describes how to make a grillage model of a PE block and estimate the weight distribution of the block on this grillage model. These steps are verified by comparing the supports reaction forces to those of the 3D finite element analysis for the PE blocks that are provided by a shipyard.