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A Study on the Development of PC-based Section Property Calculation Software for Design Engineers (설계 및 해석지원을 위한 PC용 단면계수계산 소프트웨어 개발에 관한 연구)

  • 장성국;강신한
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.20 no.44
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    • pp.497-506
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    • 1997
  • In this paper described is the software developed to calculate the physical properties of arbitrary section shape. The software consists of arbitrary section display module(ASDM) and section property calculation module(SPCM). ASDM defines and displays the shape of arbitrary section and SPCM calculates its properties such as area, centroid, moment of inertia, torsional constant, etc.. In many cases, calculation of section properties is not easy because user has to define the vertex coordinates which are difficult to do so in the case of arbitrary section. In the developed software, however, since user is asked to define only points of central lines and thickness of arbitrary section, the calculattion task of arbitrary section is very effective.

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Data Rate Analysis Using the Link Budget and Lunar Exploration Case Studies (달 탐사 사례 분석과 링크버짓 이용한 데이터 전송속도 분석)

  • Moon, Sang-Man;Kim, In-Kyu
    • Aerospace Engineering and Technology
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    • v.13 no.1
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    • pp.108-119
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    • 2014
  • In this paper, through the example of international lunar exploration mission the equipment was to investigate, and the amount of data transferred per day were identified. Data storage and the data transfer rate (8.4Mbps less) for the satisfaction of the value within the range of available S and X bands was confirmed by using the communication link budget. The result is to define the range of the sensor information can be obtained, as well as from the values of the parameters calculated for the transmission communication systems will be able to define the specifications.

A Study on Epistemological Critique between Philosophy and Architecture (건축과 철학의 인식론적 논의에 관한 연구)

  • Lee, Yong-Jae
    • Korean Institute of Interior Design Journal
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    • v.21 no.1
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    • pp.111-118
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    • 2012
  • The purpose of this study is to classify the epistemological critique between philosophy and architecture. Although there are various interpretations and criticism about the architecture, the fundamental critique of architecture is difficult. It is necessary to approach by the philosophic paradigm rather than architectural one. Therefore the procedure and method of study is to define the epistemology within philosophy and architecture, and present the classification viewpoint and the architecture case. The conclusions of this study based on purpose and process are as follows : The First, the philosophic epistemology is to mean the unity of subjective and objective. And the epistemological viewpoint of architectural philosophy is to define the construction's universality. The second, the architectural philosophy is a kind of the philosophy of art, and It is associated with the basis of aesthetics. Thus, the category of architectural philosophy like the aesthetics is classified with function directivity and form directivity, content directivity. The Last, epistemological critiques between philosophy and architecture are as follows ; 1) subject-object-integrated recognition critique (function directivity), 2) object-oriented recognition critique (form directivity), 3) subject-oriented recognition critique (content directivity).

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The Roles and Human Resources of Service Design

  • Pan, Young-Hwan
    • Journal of the Ergonomics Society of Korea
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    • v.31 no.1
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    • pp.1-5
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    • 2012
  • Objective: The aim of this study is to investigate the roles and human resources of service design. Background: The definition of service design is not clear yet, also did not define in this study. I studied the components of service design which are roles and human resources. That is helpful to understand the definition of service design and to clarify the works in service design. Method: I compare the service design with user experience design. I empirically define the roles and human resources of service design. Results: The roles of service design are service strategy, research, service concept design, service specification, service architecture design, integrated communication design, integrated system design, integrated operation design, service evaluation, launch, operation, and knowledge management. Conclusion: We defined who works and what works in service design. Application: The results of this study help the clarification of service design.

Performance Analysis of the UPC/NPC Algorithm for Guaranteed QoS in ATM Networks

  • Kim, Yong-Jin;Kim, Jang-Kyung;Lee, Young-Hee;Park, Chee-Hang
    • ETRI Journal
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    • v.20 no.3
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    • pp.251-271
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    • 1998
  • It is well known that if usage parameter control/network parameter control (UPC/NPC) functions are used together with a cell loss priority control scheme in ATM networks, the measurement phasing problem can occur. This makes it difficult for a network provider to define and commit the cell loss ratio as a QoS parameter. To solve the problem, we propose a new UPC/NPC algorithm. By using the proposed UPC/NPC algorithm, we can define the cell loss ratios for CLP = 0 and CLP = 0+1 cell streams without the measurement phasing problem under any conditions. We analyzed the performance of the proposed UPC/NPC algorithm. Using a discrete time model for the UPC/NPC architecture with a discrete-time semi-Markov process (DSMP) input model, we obtained the cell discarding probabilities of CLP = 0 and CLP = 0+1 cells streams and showed that more CLP = 0 cells are accepted compared to what was proposed in ITU-T.

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NEW CARDINAL FUNCTIONS RELATED TO ALMOST CLOSED SETS

  • Cho, Myung Hyun;Moon, Mi Ae;Kim, Junhui
    • Honam Mathematical Journal
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    • v.35 no.3
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    • pp.541-550
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    • 2013
  • In this paper, we strengthen the properties of approximation by points (AP) and weak approximation by points (WAP) considered by A. Pultr and A. Tozzi in 1993 to define ${\kappa}$-AP and ${\kappa}$-WAP for an infinite cardinal ${\kappa}$. We also strengthen the properties of radial and pseudoradial to define ${\kappa}$-radial and ${\kappa}$-pseudoradial for an infinite cardinal ${\kappa}$. These allow us to consider new cardinal functions related to almost closed sets; AP-number, WAP-number, radial number, and pseudoradial number. We study their properties and show the relationships between them. We also provide some examples around ${\kappa}$-AP and ${\kappa}$-WAP which are closely connected with ${\kappa}$-radial and ${\kappa}$-pseudoradial.

MULTIPLE Lp ANALYTIC GENERALIZED FOURIER-FEYNMAN TRANSFORM ON A FRESNEL TYPE CLASS

  • Chang, Seung Jun;Lee, Il Yong
    • Journal of the Chungcheong Mathematical Society
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    • v.19 no.1
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    • pp.79-99
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    • 2006
  • In this paper, we define a class of functional defined on a very general function space $C_{a,b}[0,T]$ like a Fresnel class of an abstract Wiener space. We then define the multiple $L_p$ analytic generalized Fourier-Feynman transform and the generalized convolution product of functionals on function space $C_{a,b}[0,T]$. Finally, we establish some relationships between the multiple $L_p$ analytic generalized Fourier-Feynman transform and the generalized convolution product for functionals in $\mathcal{F}(C_{a,b}[0,T])$.

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