1,721,008 research outputs found
Analysis of cracks emanating from a circular hole in an orthotropic infinite plate
No full textThis paper investigates the problem of cracks emanating from a circular hole in an orthotropic infinite plate. The mixed-mode sterss intensity factors are obtained by using the modified mapping-collocation method. To investigate the effect of anisotropy and circular hole of the normalized crack length for various types of laminated composite. The results indicate a strong dependence of the stress intensity factor on the material anisotropy and geometry
Single End-to-End Azido Bridged M(II) (M = Ni,Co) Chains: Syntheses, Structures and Unusual Magnetic Properties
No full text저속충격을 받는 복합적층판의 충격하중이력에 대한 예측
No full text저속충격을 받는 복합적층판의 충격하중이력을 근사적으로 예측하기 위한 방법이 제안되었다. 먼저 수정된 Hertz의 접촉법칙을 유한요소법에 적용하여 충격거동을 해석함으로써 충격하중이력을 구하였다. 구해진 충격하중이력에 대하여 모우드해석을 수행하여 충격핮우이력의 주파수특성을 고찰하였으며, 충격체의 질량을 판에 일체화한 계에 대하여 고유치문제를 해석함으로써 고유진동수를 계산하고 두 결과를 비교하였다. 충격하중이력의 예측을 위한 본 연구의 근사적 해석방법은 충격체의 질량이 충격을 받는 구조물의 질량에 비하여 큰 경우에 적용이 가능하며, 복합적층판 뿐만 아니라 접촉법칙이 알려져 있지 않은 등방성이나 직교이방성 재료의 구조물에도 효율적으로 적용할 수 있다. 본 연구의 방법을 사용하여 예측된 충격하중이력과 접촉법칙을 사용하여 해석된 결과를 비교하였다
Stochastic Finite Element Method and System Reliability Analysis for Laminated Composite Structures
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
- …
