• Title/Summary/Keyword: ConceptNet

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Method for Detecting Hyper-Presentation Specification and Inconsistent using Pertri-Net in Mobile Environments (모바일 환경에서 페트리 넷을 이용한 하이퍼-프레젠테이션의 명시 표현과 일관성을 검증하기 위한 방법)

  • Cho, Jong-Keun;Woo, Si-Yeon
    • The Journal of the Korea Contents Association
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    • v.8 no.10
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    • pp.64-75
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    • 2008
  • The concept of a hyper-presentation, as an extension of a hypermedia, is the presentation in which time-varying multimedia presentations are dynamically linked together and a hyperlink's context can be changed over time at any time during a continuous presentation. While this concept provides users with a flexible and powerful presentation for their descriptions of the multimedia datum, inconsistency problems in the synchronized presentations occur by hyper links can be introduced. This paper introduces a method of describing the hyper-presentation using petri-net and propose a methods of checking It's inconsistent hyper link loop in the hyper-presentation description.

A Method for Describing a Hyper-Presentation Specification and Checking It's Inconsistency using Petri-Net in a Internet (인터넷상에서 페트리 넷을 이용한 하이퍼-프리젠테이션의 명시 표현 및 불일치성을 검증하기 위한 방법 연구)

  • Woo, Si-Yeon;Cho, Jong-Keun;Lim, Young-Hwan;Rim, Kee-Wook
    • The KIPS Transactions:PartB
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    • v.9B no.5
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    • pp.615-624
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    • 2002
  • The concept of a hyperpresentation, as an extension of a hypermedia, is the presentation in which time-varying multimedia presentations are dynamically linked together and a hyperlink's context can be changed over time at any time during a continuous presentation. While this concept provides users with a flexible and powerful tool for their descriptions of the multimedia presentation, inconsistency problems in the synchronized presentations connected by hyper links can be introduced. This paper introduces a method of describing the hyperpresentation using Petri Net and proposes a methods of detecting inconsistent hyper link loop in the hyperpresentation description.

ON THE C-NETS

  • Lee, Seung On;Pi, Young Jin;Oh, Ji Hyun
    • Journal of the Chungcheong Mathematical Society
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    • v.23 no.1
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    • pp.109-117
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    • 2010
  • In this paper, we define the concept of a c-net and study the convergence of c-nets. Also we show that a c-net in a topological space X has a convergent sub-c-net if and only if X is a $Lindel{\ddot{o}}f$ space, if every $G_{\delta}$ set is open in X.

Economic Feasibility of Culture Using the Copper Alloy Net Cage and the Profit Model of Fish Farm on Yellowtail, Seriola quinqueradiata (동합금 가두리망 방어양식의 경제성과 수익구조)

  • Hwang, Jin-Wook
    • The Journal of Fisheries Business Administration
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    • v.52 no.2
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    • pp.33-54
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    • 2021
  • This study is aimed to analyze the economic feasibility of yellowtail culture using the copper alloy net cage in Gyeongsangbuk-do. First of all, in order to evaluate the copper alloy net cage on yellowtail culture, I review the trend on the yellowtail culture industry and research the concept of copper alloy net cage. The copper-alloy net cage is now recognized as an advantages of its system stability, recycling, antibiosis and food safety. The results were summarized as follows: first, there was significant meaning of the profit model of yellowtail culture by the price difference. Second, I analyzed in the economic feasibility of yellowtail culture using the copper alloy net cage, internal rate of return (IRR) was 51.58%, a benefit-cost ratio was shown to be 2.27 and net present value (NPV) was 1,087,337 thousand won, which indicates the economic feasibility of yellowtail culture using the copper alloy net cage is profitable. Finally, in order to improve the economic valuation, it is necessary to focus more on the developing of technology and cost reduction strategy on the copper alloy net cage.

A Study on the Shape Finding of Cable-Net Structures Introducing General Inverse Matrix (일반역행열(一般逆行列)을 이용(利用)한 케이블네트 구조물(構造物)의 형상결정에 관한 연구)

  • Sur, Sam-Uel;Lee, Jang-Bok
    • Journal of Korean Association for Spatial Structures
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    • v.2 no.1 s.3
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    • pp.75-84
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    • 2002
  • In this study, the 'force density method' for shape finding of cable net structures is presented. This concept is based on the force-length ratios or force densities which are defined for each branch of the net structures. This method renders a simple linear 'analytical form finding' possible. If the free choice of the force densities is restricted by further condition, the linear method is extended to a nonlinear one. The nonlinear one can be applied to the detailed computation of networks. In this paper, the general inverse matrix is introduced to solve the nonlinear equilibrium equation including Jacobian matrix which is rectangular matrix. Several examples for linear and nonlinear analysis applied additional constraints are presented. It is shown that the force density method is suitable for form finding of cable net and the general inverse matrix can be applied to solve the nonlinear equation without Lagrangian factors.

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Construction of Efficient Semantic Net and Component Retrieval in Case-Based Reuse (Case 기반 재사용에서 효율적인 의미망의 구축과 컴포넌트 검색)

  • Han Jung-Soo
    • The Journal of the Korea Contents Association
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    • v.6 no.3
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    • pp.20-27
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    • 2006
  • In this paper we constructed semantic net that can efficiently conform retrieval and reuse of object-oriented source code. In order that initial relevance of semantic net was constructed using thesaurus to represent concept of object-oriented inheritance between each node. Also we made up for the weak points in spreading activation method that use to activate node and line of semantic net and to impulse activation value. Therefore we proposed the method to enhance retrieval time and to keep the quality of spreading activation.

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Generation of Alternative Process Plan by Net Model (네트 모델을 이용한 대체 공정 계획 생성)

  • Park, Ji-Hyung;Park, Myon-Woong;Kang, Min-Hyoung
    • Journal of the Korean Society for Precision Engineering
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    • v.14 no.1
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    • pp.168-173
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    • 1997
  • A process planning system that generates alternative process plans offers multiple process plans for a part, thereby provides the flexibility to cope with the changes in shop floor status. In this paper, we intro- duce the concept of process net as a model for the generation of alternative process plans. We also show the usefulness of process net model in generating alternative process plans by implementing the developed sys- tem to construct process net, and devising an algorithm to generate alternative process plans for rotational parts.

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Development of a Concept Network Useful for Specialized Search Engines (전문검색엔진을 위한 개념망의 개발)

  • 주정은;구상회
    • Journal of Information Technology Applications and Management
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    • v.10 no.2
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    • pp.33-41
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    • 2003
  • It is not easy to find desired information in the world wide web. In this research, we introduce a notion of concept network that is useful in finding information if it is used in search engines that are specialized in domains such as medicine, law or engineering. The concept network that we propose is a network in which nodes represent significant concepts in the domain, and links represent relationships between the concepts. We may use the concept network constructor as a preprocessor to speci-alized search engines. When user enters a target word to find information, our system generates and displays a concept network in which nodes are con-cepts that are closely related with the target word. By reviewing the network, user may confirm that the target word is properly selected for his intention, otherwise he may replace the target word with better ones discovered in the network. In this research, we propose a detailed method to construct concept net-work, implemented a prototypical system that constructs concept networks, and illustrate its usefulness by demonstrating a practical case.

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Fluid Interaction of Digital Media -Based on Net Art- (디지털미디어의 유동적 인터렉션 - 넷 아트를 중심으로 -)

  • Kim, Hyung-Nyun
    • The Journal of the Korea Contents Association
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    • v.7 no.5
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    • pp.193-201
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    • 2007
  • The information technology is quickly changing the paradigm of the overall society. This change has influenced the art field and exceeded the limit of prior art characteristics and methods opening up a new world of art pieces starting among the young artists based on digital art technology. Especially the internet art of the computer technology made the communication of the artist and the viewer to communicate in a bilateral manner different from one way feeding of the past and made it possible for the viewers to choose their involvement in the act of seeing the work changing the reaction into a fluid concept. This thesis is about using the digital media in the net art communication to figure out the fluid interaction by approaching the digital media concept and by analyzing the characteristics of net art communication means and thus take a overall look at the artist related web sites and see the net art as a new communication means.

An Experimental Study on RCCI(Reactivity Controlled Compression Ignition) Combustion of Dual-fuel due to Injector Characteristics (인젝터 특성에 따른 2중 연료의 RCCI 연소에 관한 실험적 연구)

  • Sung, Ki-An
    • Transactions of the Korean Society of Automotive Engineers
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    • v.20 no.2
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    • pp.110-115
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    • 2012
  • This study describes the characteristics of combustion and exhaust emission in the special engine applying a fuel reactivity controlled compression ignition (RCCI) concept with two different energizing type (solenoid and piezoelectric) injectors for diesel injection. A diesel-gasoline mixed dual-fuel reactivity controlled compression ignition concept is demonstrated as a promising method to achieve high thermal efficiency and low emission in internal combustion engines for transportation vehicles. For investigating the combustion characteristics of RCCI, engine experiments were performed in a light-duty diesel engine over a range of injection timing and mixing rate of gasoline in mass. It was investigated that by increasing the nozzle hole diameter, increasing the combustion pressure and the net indicated mean effective pressure. $NO_x$ and soot can be reduced by advancing start of injection in 84 mixing rate of gasoline in mass. The resulting operation showed that light duty engine could achieve 48 percent net indicated efficiency and 191[g/kW-hr] net indicated specific fuel consumption with lower levels of nitrogen oxides and soot.