2,404 research outputs found
Interval field implementations for spatial uncertainty processing in non-deterministic FE analysis
No full textThis paper discusses the application of interval fields for the analysis of uncertain mechanical structures. More specifically, this work illustrates the use of interval fields to represent uncertainties with spatially distributed uncertain parameters in the context of finite element analysis. Four different mathematical interval field implementations are in- troduced and their effcieny and accuracy is compared. Finally, these implementations are illustrated and validated using a static stress analysis of a conical shell structure. © 2013 by Wim Verhaeghe, Wim Desmet, Dirk Vandepitte and David Moens.status: Publishe
Entertainer: Pieter-Dirk Uys
No full textThis booklet celebrates the life and work of Pieter-Dirk Uys, internationally acclaimed playwright, author, role-model and one of South Africa's living treasures
Entertainer: Pieter-Dirk Uys
No full textThis booklet celebrates the life and work of Pieter-Dirk Uys, internationally acclaimed playwright, author, role-model and one of South Africa's living treasures
Entertainer: Pieter-Dirk Uys
No full textThis booklet celebrates the life and work of Pieter-Dirk Uys, internationally acclaimed playwright, author, role-model and one of South Africa's living treasures
Formal Techniques and Self/Other Relations in the Novels of Dirk Bogarde
No full textThe thesis foregrounds the distinctive contribution Dirk Bogarde made to
contemporary writing in a second career that developed in parallel to his screen
commitments. It dispels the notion that Bogarde followed a familiar path as an actor
who wrote books. Instead it establishes his reputation as an innovative writer whose
formal technique was substantially influenced by the textual systems of cinema and
the cross-fertilisation from acting to writing.
In examining the formative factors that steered Bogarde towards authorship, the
thesis addresses the role of performance as a generative factor in the evolution of the
novels, establishing a discursive link with Bakhtinian dialogism, and specifically,
transgredience as a formal imperative. Secondly, it affords a critical insight into why
the major concerns with staging and performativity preoccupy his writing career.
The thesis claims that Bogarde was an empirically dialogical writer whose use
of camera-eye narration fostered the proliferation of competing discourses across the
fiction. This formal dynamic is centred on the relationship between stages and
dialogism, which incorporates the work of Erving Goffinan as a complementary
critique to Bakhtinian theory with its emphasis on self-presentation. The concern
with socially-constructed behaviour leads the thesis to address the associated issues of
stereotyping and 'otherness', which in terms of body politics is articulated by the
mono logic drive to confine the sexual 'other' to a fixed representation.
Bogarde's ability to draw on cinematic and performance techniques identifies
an area of expertise unavailable to most other writers. This is an unusual repository
of skills to bring to writing which is why the thesis makes the claim for his singular
achievement as a contemporary author. There are fruitful points of intersection to be
explored in this respect with the work of Christopher Isherwood, whom Bogarde read
and admired, as a basis for further research. It is hoped that the thesis will play its
part in opening up new possibilities for Bogarde's writing to be re-visited by future
critics
Experimental dataset: stereo-DIC experiment on uniaxially loaded, S-Shaped, high density polyethylene test sample
No full textStereo-DIC experiments were performed on uniaxially loaded, s-shaped, high-density polyethylene test sample. 100 stationary images of unloaded test sample were taken for evaluation of DIC noise floor. Stereo calibration image dataset, involving a calibration target with rectangular grid (12 by 9 and pitch of 10 mm), is also made available. Tensile load from the test bench load-cell sampled at each moment an image is captured is available.</span
"The end of national models? Integration courses and citizenship trajectories in Europe"
No full textSeveral European countries have recently introduced or are planning to introduce citizenship trajectories (voluntary or obligatory inclusion programs for recent immigrants) or citizen integration tests (tests one should pass to be able and acquire permanent residence or state citizenship). Authors like Joppke claim this is an articulation of a more general shift towards the logic of assimilation (and away from a multicultural agenda) in integration policy paradigms of European States. Integration policies would even be converging in such a fashion that it would no longer make sense to think in terms of national models for immigrant integration. One cannot deny the empirical fact of diffusion of civic integration policies throughout Europe. This paper claims there is, however, still sufficient distinctiveness between immigrant integration policies in order to continue and use an analytical framework which distinguishes national models
Calculation of the complete shortening-load curve for an imperfect strut (met Dirk V.H. Vandepitte). Festschrift Udo Vogel. Universität Karlsruhe, März 1993, pp. 173-184.
No full textOntwikkeling van een golfgebaseerde voorspellingstechniek voor de efficiënte laag- en middenfrequente structuurdynamische analyse
No full textDit proefschrift beschrijft de ontwikkeling van een golfgebaseerde voorspellingstechniek voor de analyse van het trillingsgedrag van mechanische constructies. De huidige technieken voor de trillingsanalyse van een constructie zijn voornamelijk gebaseerd op deterministische technieken, zoals de eindige elementenmethode. De toenemende rekenkundige belasting voor toenemende frequenties beperkt de praktische toepasbaarheid van de eindige elementenmethode tot het laagfrequente gebied. De golfgebaseerde methode is een alternatieve deterministische methode gebaseerd op de indirecte Trefftz methode. De kleinere rekenkundige belasting van de golfgebaseeerde methode verhoogt de toepasbaarheid van de techniek naar het middenfrequente gebied. Dit proefschrift rapporteert over de ontwikkeling van de golfgebaseerde methode voor de trillingsanalyse van constructies bestaande uit vlakke platen. Een gedetailleerde performantiestudie toont aan dat de golfgebaseerde methode rekenefficiënter is dan de eindige elementenmethode, wat nauwkeurige voorspellingen bij hogere frequenties toelaat. De efficiëntie van de golfgebaseerde methode is echter het meest uitgesproken voor problemen met een beperkte geometrische complexiteit. Om de algemene toepasbaarheid van de methode te verhogen is een hybride koppeling met de eindige elementenmethode voorgesteld. Deze combineert de rekenkundige efficiëntie van de golfgebaseerde methode met de geometrische flexibiliteit van de eindige elementenmethode. Numerieke validatievoorbeelden tonen de haalbaarheid en verhoogd prestatievermogen van de hybride methode aan.status: Publishe
Wave Based Modelling Techniques for Unbounded Acoustic Problems
No full textIn recent years, the industrial design process has become increasingly dependent on numerical CAE tools to replace the time-consuming and expensive prototype testing. A competitive market driven by a consumer focus urges designers to take into account many product properties. Amongst those, the acoustic characteristics are quickly gaining importance; a trend which is amplified by recent legislations regarding noise and acousticcomfort.A survey of the state-of-the-art techniques reveals that the construction of an accurate and reliable numerical model of an acoustic problem is not a trivial task. Dedicated techniques have been developed to successfully solve the acoustic problem both at low and high frequencies. However, both approaches fall short in covering an important mid-frequency range, in which the typical wavelengths are neither very largenor very small compared to the problem dimensions. The unbounded natureof many acoustic problems --- think of an object radiating sound into the environment --- further complicates matters: many simulation techniques based on a problem discretisation can only be used after a reformulation of the problem to an equivalent bounded form.The work presented here is framed in the development of the Wave Based Method (WBM), a novel simulation technique for steady-state dynamic problems. Using a wave-like Trefftz basis, the WBM is able to deliver accurate predictions in the difficult mid-frequency range. Until now, the development of the WBM focussed on bounded acoustic problems. A first contribution of this work consists in the further development of the method to efficiently deal with unbounded problems, including radiation, scattering and diffraction.The second contribution focusses on the geometrical limitations of the WBM. The flexibility of the method is an important point of attention:the use of a Trefftz basis is very efficient, but imposes some constraints on the problem geometry. A multi-level framework for WBM calculations is proposed, which allows an elegant and efficient solution of complexmultiple-scatterer problems. Moreover, an extension of the existing hybrid FE-WBM to unbounded problems enables the treatment of scatterers with a geometrically detailed surface.Both contributions are validated through a series of numerical examples, illustrating the applicability and efficiency of the developed techniques, in relation to the current state-of-the-art.status: Publishe
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