• Title/Summary/Keyword: 선요소

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A study on the Human Network Visualization on Mobile Phone for Characteristics of Relational Data (관계망 데이터 특성을 이용한 모바일 인맥 네트워크의 시각화에 관한 연구)

  • Jeong, Gye-Oun;Lee, Kyung-Won
    • 한국HCI학회:학술대회논문집
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    • 2007.02b
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    • pp.424-431
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    • 2007
  • 본 연구는 관계망 시각화에 이용되는 데이터의 특성을 분석하고 그에 맞는 시각화 요소를 추출하여 시각화하는 것에 관한 연구이다. 사회 관계망 시각화는 점과 선을 기초 요소로 하여 점은 사회적 요소(actor), 선은 관계(relation)를 의미한다, 점과 선은 시각화에 사용되는 데이터의 특성에 따라 다양한 형태를 갖게 된다. 이 논문에서는 관계망 시각화에 사용되는 데이터의 특성을 데이터의 형태, 관계, 상태에 따라 분류하고, 각각의 특성에 맞는 관계망 시각화의 형태를 추출하고, 그에 따른 시각화 요소를 추출하였다. 이를 바탕으로 모바일 커뮤니케이션을 통해 형성되는 인맥 네트워크를 시각화함으로써, 인맥 네트워크 구성원 간의 친밀도를 효과적으로 파악할 수 있는 방법에 대해 제시하였다. 또한, 시각화의 결과를 이용하여 휴대전화로 인맥 네트워크를 유지, 관리하기 위한 서비스를 제안하였다. 이러한 연구는 데이터의 특성에 맞는 시각화의 요소를 추출하고, 데이터의 형태, 관계, 상태를 직관적으로 제공함으로써 사용자로 하여금 자신의 인맥 네트워크 구성원들의 친밀도와 관계 형태, 상태를 파악하여 자신의 인맥을 유지, 관리하고 보수할 수 있도록 한다.

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Facial Feature Detection and Facial Contour Extraction using Snakes (얼굴 요소의 영역 추출 및 Snakes를 이용한 윤곽선 추출)

  • Lee, Kyung-Hee;Byun, Hye-Ran
    • Journal of KIISE:Software and Applications
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    • v.27 no.7
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    • pp.731-741
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    • 2000
  • This paper proposes a method to detect a facial region and extract facial features which is crucial for visual recognition of human faces. In this paper, we extract the MER(Minimum Enclosing Rectangle) of a face and facial components using projection analysis on both edge image and binary image. We use an active contour model(snakes) for extraction of the contours of eye, mouth, eyebrow, and face in order to reflect the individual differences of facial shapes and converge quickly. The determination of initial contour is very important for the performance of snakes. Particularly, we detect Minimum Enclosing Rectangle(MER) of facial components and then determine initial contours using general shape of facial components within the boundary of the obtained MER. We obtained experimental results to show that MER extraction of the eye, mouth, and face was performed successfully. But in the case of images with bright eyebrow, MER extraction of eyebrow was performed poorly. We obtained good contour extraction with the individual differences of facial shapes. Particularly, in the eye contour extraction, we combined edges by first order derivative operator and zero crossings by second order derivative operator in designing energy function of snakes, and we achieved good eye contours. For the face contour extraction, we used both edges and grey level intensity of pixels in designing of energy function. Good face contours were extracted as well.

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Comparison Study of Elastic Catenary and Elastic Parabolic Cable Elements for Nonlinear Analysis of Cable-Supported Bridges (케이블교량의 비선형해석을 위한 탄성현수선 및 탄성포물선 케이블요소의 비교연구)

  • Song, Yo Han;Kim, Moon Young
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.31 no.5A
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    • pp.361-367
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    • 2011
  • This study introduces an elastic parabolic cable element for initial shaping analysis of cable-supported structures. First, an elastic catenary cable theory is shortly summarized by deriving the compatibility condition and the tangent stiffness matrices of the elastic catenary cable element. Next, the force-deformation relations and the tangent stiffness matrices of the elastic parabolic cable elements are derived and discussed under the assumption that sag configuration under self-weights is small. In addition the equivalent cable tension is defined in the chord-wise direction. Finally, to demonstrate the accuracy of the elastic parabolic cable element, nonlinear relationships of nominal cable tension-chord length and nominal cable tension-tangential stiffness for a single element are presented and compared with results using an elastic catenary cable theory as the slope is varied.

Optimal Positioning of Heating Lines in a Compression Molding Die Using the Boundary Element Method (경계요소법을 이용한 압축성형다이 가열선의 최적위치 설계)

  • 이부윤;조종래
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.17 no.6
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    • pp.1478-1485
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    • 1993
  • A shape optimization problem is formulated to determine the optimal position of heating lines in a compression molding die. The objective of the problem is that the cavity surface would be maintained by a prescribed uniform temperature. A boundary integral equation for the sensitivity of the temperature in terms of hole position is derived using the method of shape design sensitivity analysis. The boundary element method is employed to analyze the temperature and sensitivity field of the die. The sensitivity calculation algorithm is incorporated in an optimization routine. To demonstrate a numerical implementation, an example problem arising in thermal design of a compression molding die is dealt with, showing that the number of heating lines chosen for the die strongly affects the ultimate uniformity of the cavity surface temperature.

Finite Element Analysis of Superplastic Forming/Diffusion Bonding Processes (초소성 성형/확산접합 공정의 유한요소 해석)

  • 홍성석;김용환
    • Transactions of Materials Processing
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    • v.5 no.1
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    • pp.37-46
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    • 1996
  • Superplastic forming/diffusion bonding (SPF/DB) processes were analyzed using a rigid visco-plastic finite element method. The optimum pressure-time relationship for a target strain rate and thickness distributions were predicted by two-node line elements based on the membrane approximation for plane strain. Material behavior during SPF/DB of the integral structures having complicated shapes was investigated. The tying condition is employed for the analysis of inter-sheet contact problems. A movement of rib structure is successfully predicted during the forming.

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Application of New Edge-to-Edge Contact Algorithm to Discontinuous Deformation Analysis (불연속 변형해석에서의 새로운 선-선 접촉 해석 적용)

  • Lee Chung-In;Moon Young-Sam;Choi Yong-Keun;Ahn Tae-Young
    • Tunnel and Underground Space
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    • v.15 no.4 s.57
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    • pp.305-315
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    • 2005
  • DDA (Discontinuous Deformation Anlaysis) is one of the latest numerical analysis which has merits of both FEM and DEM. In this research a new edge-to-edge contact algorithm was applied on DDA. With adoption of new edge-to-edge contact state definition, sub-algorithm was improved about open-close iteration, contact state judge, contact detecting, and friction forces acting on joints. Newly applied DDA was verified based on two different cases. The DDA results show good agreement with numerically predicted one.

A Study on the Nail Art Design Applying Point, Line, and Plane as Forming Elements (조형요소인 점, 선, 면을 적용한 네일아트 디자인 연구)

  • Ko, Jung-Min
    • Journal of Convergence for Information Technology
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    • v.10 no.11
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    • pp.265-271
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    • 2020
  • This study aims to help the creative idea of nail art design and the expansion of artistic realm by presenting nail art applied with dot, line, and plane, which are the basic elements of the sculpture that make up the space for visual expression of nail art. The research method considered the concepts and characteristics of the molding elements through professional books, prior research, and Internet website. Along with various expression techniques, the characteristics of dot, line, and plane were applied to nail art and expressed as visual messages, and a total of six works were produced according to each characteristic. This research aims to find a new perspective on nail art expression by reinterpreting the characteristics of dot, line, and plane, which are formative elements, in an artistic approach, and to contribute to enhancing the infinite possibilities of nail art design by utilizing them.

BORDERLINE PERSONALITY DISOREDER IN ADOLESCENTS (청소년기의 경계선 인격장애)

  • Jang, Kyung-June;Chung, Jea-Yun
    • Journal of the Korean Academy of Child and Adolescent Psychiatry
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    • v.6 no.1
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    • pp.34-42
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    • 1995
  • Borderline personality disorder in adolescents present with suicide attempts or gestures, and they are characterized by the same patterns of splitting, devaluation, manipulation, need-gratifying object relations, impulsivity, and ego deficits that are finds in borderline adults, Symptomatolgy are depression, anxiety, identity crisis, and occasionally antisocial behavior in borderline personality disorder in adolescents. These findings should be differentiated to normal stormy adolescents. Theses borderline personality disorder in adolescents are known about the instability of object relations, labile affect, splitting, and psychotic episode in severe stress. According to thses finding, schizophrenia, mood disorder, schizoptypal personality disorder, paranoid personality disorder could be differentiated. Etiology is complex including psychodynamic, genetic, familial factor. Treatments are individual psychotherapy, group therapy, and pharmacotherapy. The continuity or discontinuity of borderline states from childhoon to adult life is controversy.

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Determining Input Values for Dragging Anchor Assessments Using Regression Analysis (회귀분석을 이용한 주묘 위험성 평가 입력요소 결정에 관한 연구)

  • Kang, Byung-Sun;Jung, Chang-Hyun
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.27 no.6
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    • pp.822-831
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    • 2021
  • Although programs have been developed to evaluate the risk of dragging anchors, it is practically difficult for VTS(vessel traffic service) operators to calculate and evaluate these risks by obtaining input factors from anchored ships. Therefore, in this study, the gross tonnage (GT) that could be easily obtained from the ship by the VTS operators was set as an independent variable, and linear and nonlinear regression analyses were performed using the input factors as the dependent variables. From comparing the fit of the polynomial model (linear) and power series model (nonlinear), the power series model was evaluated to be more suitable for all input factors in the case of container ships and bulk carriers. However, in the case of tanker ships, the power supply model was suitable for the LBP(length between perpendiculars), width, and draft, and the polynomial model was evaluated to be more suitable for the front wind pressure area, weight of the anchor, equipment number, and height of the hawse pipe from the bottom of the ship. In addition, all other dependent variables, except for the front wind pressure area factor of the tanker ship, showed high degrees of fit with a coefficient of determination (R-squared value) of 0.7 or more. Therefore, among the input factors of the dragging anchor risk assessment program, all factors except the external force, seabed quality, water depth, and amount of anchor chain let out are automatically applied by the regression analysis model formula when only the GT of the ship is provided.

2D Image-based Virtual Plastic Surgery System Using Variable Warping Mask and Smudge Filter (가변 워핑 마스크와 스머지 필터를 이용한 2D 실사 기반 가상 성형 시스템)

  • Kwak, No-Yoon;Ahn, Eun-Young
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2008.02a
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    • pp.191-195
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    • 2008
  • 가상 성형 시스템은 실제 성형 수술을 시행하지 않은 상태에서도 성형 후의 형상을 가상적으로 시뮬레이션해 봄으로써 고객의 의사 결정과 성형의의 수술 계획 및 상담을 효과적으로 지원할 수 있는 그래픽 시스템이다. 본 논문은 가변 워핑 마스크와 스머지 필터를 이용한 2D 가상 성형 시스템의 반자동 필드 워핑을 제안함으로써 가상 성형의 편의성과 실용성을 제고함에 그 목적이 있다. 제안된 2D 가상 성형 시스템은 마우스로 스머지 필터를 조작하여 얼굴 구성 요소의 윤곽 형상을 원하는 형태로 변형할 수 있는 직관적인 사용자 인터페이스를 제공한다. 얼굴 구성 요소의 스머징 전후의 윤곽선을 대상으로 다각형 근사화에 기반한 계층적 제어선 매핑을 통해 획득한 제어선 쌍들을 이용하여 반자동 필드 워핑을 수행함으로써 소스 제어선으로부터 목표 제어선까지 점진적으로 변해가는 다수의 중간 프레임들을 생성한다. 또한 이 반자동 필드 워핑을 수행할 시, 성형부위의 변형을 따라 단계적으로 모양이 변하는 가변 워핑 마스크를 사용함으로써 변형 부위 이외의 얼굴 구성 요소들에 대해서는 왜곡을 최소화하는 지역적 변형 특성을 제고한 것이 특징이다. 제안된 2D 가상 성형 시스템은 직관적이고 편리한 사용자 인터페이스를 제공할 수 있기 때문에 시간이 적게 소요되고 작업 피로도가 낮아 실용성이 높다. 따라서 비숙련자도 간단한 사용자 입력만으로 만족스러운 가상 성형 결과를 얻을 수 있다. 특히 짧은 시간 내에 성형의와 고객이 만족하는 직관적인 상담을 가능케 하는 것이 장점이다.

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