198,995 research outputs found
Self-archiving practice and the influence of publisher policies in the social sciences
No full textAuthors in different disciplines exhibit very different behaviours on the so-called ‘green’ road to open access, i.e. self-archiving. This study looks at the self-archiving behaviour of authors publishing in leading journals in six social science disciplines. It tests the hypothesis that authors are self-archiving according to the norms of their respective disciplines rather than following self-archiving policies of publishers, and that, as a result, they are self-archiving significant numbers of publisher PDF versions. It finds significant levels of
self-archiving, as well as significant self-archiving of
the publisher PDF version, in all the disciplines
investigated. Publishers’ self-archiving policies have
no influence on author self-archiving practice
Robust stabilization in the presence of coprime factor perturbations
No full textThe robust stabilization problem first suggested by M. Vidyasagar (1986) is considered. The authors examine uncertainty in the nominal system modeled by additive perturbations on the coprime factors of the system. It is demonstrated that the bound on the admissible uncertainty in D. McFarlane and K. Glover (1989) is restrictive in that there exist perturbations of larger size than this bound which are still stabilized. In the present work, the author examine perturbations in certain 'key' directions whose sizes are larger than the robustness margin but do not destabilize the plant.</p
Balanced parametrizations and canonical forms for system identification
No full textThis paper contains a review of recent results concerning the parametrization of asymptotically stable linear systems using balanced realizations. Particular emphasis is given on the application of these results to system identification. This work is part of a continuing programme aimed at elucidating the role of balanced realization in system identification.</p
Poly(ester-ß-sulphide) from azoxybis(1,4-phenylene diacrylate and 2,2’-oxydiethanedithiol
No full textHere We Are! Here We Are! Or Cross Ober Jordan
No full text80.7568.482 – “Here We Are! Here We Are! Or Cross Ober Jordan”: Daniel D. Emmett: Arranged by M. Keller: William Hall & Son: 1863: Vocal Solo & Chorus
A functional approach to LQG balancing
No full textThe paper has as its theme a circle of problems related to LQG balancing, with a special emphasis on the related problems of model reduction and robust stabilization. The aim is to present a unified point of view to both previously described problems. The unification is achieved by focusing on the study of three functions and the relationships between them and the various operators that are associated with these functions. With an arbitrary transfer function G one can associate, canonically, two objects—the conjugate inner function which is based on the NRCF, and the R, which is associated with the LQG controller of the function G. The approach that is taken is functional emphasizing operators. A balanced realization of a stable g arises as a matrix representation of the shift realization, with respect to a basis made out of suitably normalized Hankel singular vectors. A similar result holds for LQG balanced realizations. Here, the underlying Hankel operator we study is HR, where _R= U*M + V*N and U, V solve the H∞-Bezout equation M¯V − N¯U = I. This Hankel operator has the same singular vectors, though different singular values and Schmidt pairs, as H. The basis of singular vectors of HR determines canonically a basis for the polynomial model shift realization of g corresponding to which the matrix representation is LQG balanced. One of the central results is that the optimal Hankel norm approximant of is up to a scaling factor also conjugate inner Denoting by R the symbol associated with the LQG controller of gn, we show that -R* is the strictly proper part of the best n - 1 order Hankel norm approximant of R*. We will also obtain state-space representations for R* and gn in terms of the parameters in the LQG balanced state space representation of g. Similar results hold for the case of Nehari complements. These are applied to robust control. As a result of this study the problems of model reduction and robust stabilization can be viewed as dual problems.</p
Edge detection by landing honeybees: behavioural analysis and model simulations of the underlying mechanism
No full textKern R, Egelhaaf M, Srinivasan MV. Edge detection by landing honeybees: behavioural analysis and model simulations of the underlying mechanism. Vision Research. 1997;37(15):2103-2117
Balanced parametrization in time-series identification
No full textThe authors examine the identification of time-series, following a predictor-error approach using a novel parametrization for predictors. This parametrization relies on a canonical form for minimum-phase systems which utilizes a generalized notion of a balanced realization. In this framework an identification scheme involving only unconstrained optimizations is developed, and an approach to the order selection problem is suggested.</p
Following the Otherwise. Contributions of Intersectional Feminist Design Pedagogies Towards Socially Transformative Practice
No full textThis paper discusses the preliminary findings of an interdisci-plinary research project, situated between Anthropology of Educa-tion, Design, and Gender Studies, that engages in looking at the con-temporary intersectional feminist design pedagogies and explores how they inform design practice towards the otherwise, basing on two case studies. Written in a hybrid form, merging academic writ-ing, and creative non-fiction, this paper presents ethnographic data from the fieldwork. Employing ethnographic methods, in particular, participant observation allows the author to inquire how intersec-tionality can inform design pedagogy. What concepts, ideas, meth-ods, and tools are employed and how they adapt and transform across the two programmes, depending on the cultural, political, spatial and social context on the macro level, and on the personal circumstances and background on the micro-level
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
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