1,720,973 research outputs found
Quasy-stationary ferromagnetic thin films in degenerated cases
No full textIn this paper we study the asymptotic behavior of a quasy-stationary ferromagnetic problem in a multi-domain consisting of two joined thin films. It is possible to distinguish different regimes depending on the limit q of the ratio between the small thickness of the two films. Here the case q=0 and q=+∞ are analyzed
HOMOTHETIC CHANGES OF VARIABLES AND THE UNIQUE EXTENSION PROBLEM IN CALCULUS OF VARIATIONS
No full textOptimal Control Problem for an Anisotropic Parabolic Problem in a Domain with Very Rough Boundary
No full textIn this paper, using Pontryagin's maximum principle, we study the asymptotic
behaviour of a parabolic optimal control problem in a domain whose boundary contains a highly oscillating part. On this part we consider a
homogeneous Neumann boundary condition. We identify the limit problem, which
is an optimal control problem for the limit equation. Moreover, we explicitly
remark that both limit state equation and limit cost are different from those
ones at level
Optimal controls of hyperbolic equations in domains with oscillating boundary
No full textOur aim is to study the asymptotic behaviour of a second-order
linear evolution problem in a domain, a part of wich has an oscillating boundary.
An homogeneous Neumann condition is given on the whole boundary of the domain.
Moreover the behaviour of associated optimal control problem is analyzed
Optimal control for a second-order linear evolution problem in a domain with oscillating boundary
No full textThis paper is concerned with the study of homogenization of an optimal control
problem governed by a second-order linear evolution equation with a homogeneous
Neumann boundary condition in a domain bounded at the bottom by a smooth
wall and at the top by a rough wall. The latter is assumed to consist in a plane
wall covered with periodically distributed asperities, with a fixed height, whose size
depends on a small parameter . We identify the limit problem and we remark that
both limit state equation and limit cost are different from those ones at ε−level
Homogenization and behaviour of optimal controls for the wave equation in domains with oscillating boundary
No full textIn this paper the asymptotic behaviour of a second-order linear
evolution problem is studied in a domain, a part of wich has an oscillating boundary. An homogeneous Neumann condition is given on the whole boundary of the domain. Moreover the behaviour of associated optimal control problem is analyzed
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
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