266 research outputs found

    The Corondimas principle is still alive and well :. Diggers Development (Pty) Ltd v City of Matlosana : Case no 824/2010. [2011] ZASCA 247

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    It is a trite principle of the law of contract that a condition is an uncertain future event upon which either the commencement of the duty to perform or the contract’s continued existence is made dependent. The effect of a suspensive condition can be summarised as follows (see Otto and Prozesky-Kuschke “General principles of the law of contract” in Nagel (ed) Commercial law (2011) 114–115): A condition is suspensive when the right or duty to performance in terms of a contract is suspended or postponed pending (and thus made dependent upon) the occurrence or non-occurrence of an uncertain future event specified in the contract. Pending the fulfilment of the condition, a contractual relationship indeed exists between the parties. One of the consequences of the existence of a contractual relationship is that neither party can withdraw from the contract and that any additional duty must be performed. Upon fulfilment of the condition, the parties are entitled to performance and obliged to perform. Before fulfilment, performance may not be claimed. If the condition is not fulfilled, the contract is terminated and neither party has to perform. In addition, either party is entitled to the return of anything already performed (see also Hutchison and Pretorius (eds) The law of contract in South Africa (2009) 247–248; Van der Merwe et al Contract general principles (2007) 289–293; Van Rensburg et al “Contract” 5(1) LAWSA (2004) paras 436–437; Kerr The Principles of the law of contract (2002) 446–449 and Christie The law of contract in South Africa (2011) 145 and authorities cited).http://www.lexisnexis.co.zaam201

    Jamming at Zero Temperature and Zero Applied Stress: the Epitome of Disorder

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    We have studied how 2- and 3- dimensional systems made up of particles interacting with finite range, repulsive potentials jam (i.e., develop a yield stress in a disordered state) at zero temperature and applied stress. For each configuration, there is a unique jamming threshold, ϕc\phi_c, at which particles can no longer avoid each other and the bulk and shear moduli simultaneously become non-zero. The distribution of ϕc\phi_c values becomes narrower as the system size increases, so that essentially all configurations jam at the same ϕ\phi in the thermodynamic limit. This packing fraction corresponds to the previously measured value for random close-packing. In fact, our results provide a well-defined meaning for "random close-packing" in terms of the fraction of all phase space with inherent structures that jam. The jamming threshold, Point J, occurring at zero temperature and applied stress and at the random close-packing density, has properties reminiscent of an ordinary critical point. As Point J is approached from higher packing fractions, power-law scaling is found for many quantities. Moreover, near Point J, certain quantities no longer self-average, suggesting the existence of a length scale that diverges at J. However, Point J also differs from an ordinary critical point: the scaling exponents do not depend on dimension but do depend on the interparticle potential. Finally, as Point J is approached from high packing fractions, the density of vibrational states develops a large excess of low-frequency modes. All of these results suggest that Point J may control behavior in its vicinity-perhaps even at the glass transition.Comment: 21 pages, 20 figure

    Standardized image interpretation and post-processing in cardiovascular magnetic resonance - 2020 update : Society for Cardiovascular Magnetic Resonance (SCMR): Board of Trustees Task Force on Standardized Post-Processing

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    With mounting data on its accuracy and prognostic value, cardiovascular magnetic resonance (CMR) is becoming an increasingly important diagnostic tool with growing utility in clinical routine. Given its versatility and wide range of quantitative parameters, however, agreement on specific standards for the interpretation and post-processing of CMR studies is required to ensure consistent quality and reproducibility of CMR reports. This document addresses this need by providing consensus recommendations developed by the Task Force for Post-Processing of the Society for Cardiovascular Magnetic Resonance (SCMR). The aim of the Task Force is to recommend requirements and standards for image interpretation and post-processing enabling qualitative and quantitative evaluation of CMR images. Furthermore, pitfalls of CMR image analysis are discussed where appropriate. It is an update of the original recommendations published 2013

    Review: The Newsletter of the Literary Managers and Dramaturgs of the Americas, volume 16, issue 2

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    Contents include: Driving, LMDA Conference 2006: Think Dramaturgically, Act Locally, Words of Welcome from the Conference Committee, Developing a Sense of Community: Reflections on the Balance of a Community Engagement and Artistic Integrity while Creating a Dramaturg-Driven Documentary Play, In Print: The Seattle Public Library Introduction, The Seattle Public Library: A Conversation, Dramaturgy as Catalyst: A Rockies Dramaturg Driven Project, and American Playwrights and Playwriting. Issue editors: D.J. Hopkins, Shelley Orr, Madeleine Oldhamhttps://soundideas.pugetsound.edu/lmdareview/1033/thumbnail.jp

    Review: The Newsletter of the Literary Managers and Dramaturgs of the Americas, volume 15, issue 2

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    Contents include: Shopping=Theatre: Re-Staging Retail in NYC, LMDA\u27s Prez On Our Upcoming Extravaganza in the Lone Star State, Confessions of an Early Career Dramaturg, Dramablog, Dramaturging Education, Educating Dramturgs, Henier Muller on 42nd Street, LMDA\u27s Dramaturg Driven Project Gets Under Way, LMDA Regional Updates Issue editors: D.J. Hopkins, Shelley Orr, Megan Monaghan, Madeleine Oldhamhttps://soundideas.pugetsound.edu/lmdareview/1031/thumbnail.jp

    Cell shape analysis of random tessellations based on Minkowski tensors

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    To which degree are shape indices of individual cells of a tessellation characteristic for the stochastic process that generates them? Within the context of stochastic geometry and the physics of disordered materials, this corresponds to the question of relationships between different stochastic models. In the context of image analysis of synthetic and biological materials, this question is central to the problem of inferring information about formation processes from spatial measurements of resulting random structures. We address this question by a theory-based simulation study of shape indices derived from Minkowski tensors for a variety of tessellation models. We focus on the relationship between two indices: an isoperimetric ratio of the empirical averages of cell volume and area and the cell elongation quantified by eigenvalue ratios of interfacial Minkowski tensors. Simulation data for these quantities, as well as for distributions thereof and for correlations of cell shape and volume, are presented for Voronoi mosaics of the Poisson point process, determinantal and permanental point processes, and Gibbs hard-core and random sequential absorption processes as well as for Laguerre tessellations of polydisperse spheres and STIT- and Poisson hyperplane tessellations. These data are complemented by mechanically stable crystalline sphere and disordered ellipsoid packings and area-minimising foam models. We find that shape indices of individual cells are not sufficient to unambiguously identify the generating process even amongst this limited set of processes. However, we identify significant differences of the shape indices between many of these tessellation models. Given a realization of a tessellation, these shape indices can narrow the choice of possible generating processes, providing a powerful tool which can be further strengthened by density-resolved volume-shape correlations.Comment: Chapter of the forthcoming book "Tensor Valuations and their Applications in Stochastic Geometry and Imaging" in Lecture Notes in Mathematics edited by Markus Kiderlen and Eva B. Vedel Jense

    What's new pussycat? A genealogy of animal celebrity

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    Animal celebrity is a human creation informing us about our socially constructed natural world. It is relational, expressive of cultural proclivities, political power plays and the quotidian everyday, as well as serious philosophical reflections on the meaning of being human. This article attempts to outline some key contours in the genealogy of animal celebrity, showing how popular culture, including fairground attractions, public relations, Hollywood movies, documentary films, zoo attractions, commercial sport and mediatised moral panics - particularly those accompanying scientific developments such as cloning - help to order, categorise and license aspects of human understanding and feelings. The nature of [animal] charisma and celebrity are explored with assistance from Jumbo the Elephant, Guy the Gorilla, Paul the clairvoyant octopus, Uggie the film star, Nénette the orang-utan and Dolly the sheep. It argues that the issue of what it is to be human lies beneath the celebritised surface or, as Donna Haraway noted, the issue 'of having to face oneself'

    Algunes reflexions entorn de la conceptualització de la infància i adolescència en risc social a l'Estat espanyol

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    L'article realitza una aproximació a les interpretacions del concepte de risc social de la infancia per part de diversos autors d'àmbit estatal, tenint també en compte els marcs legals català i espanyol. Pretén aclarir quins són els criteris valoratius emprats, tant des de l'àmbit acadèmic com del professional, per interpretar les categoritzacions de la infància i l'adolescència en processos de dificultat i precarietat social. Des d'aquesta perspectiva, s'hi analitza l'estreta relació entre factors de risc, desemparament i marginació. S'hi rebutgen les interpretacions que responsabilitzen el propi menor de la desadaptació, i s'hi defensa la hipótesi de la necessitat d'una intervenció socioeducativa que treballi per una disminució dels factors de risc en el propi medi, mantenint el seu protagonisme en aquest procés.This article is an approach to the different acceptances of the concept social risk as well as the terms neglect and maladjustment, based on the reflections made by different authors and both statal and autonomous legal framework. It intends to clarify which are the criteria of values used in academic and professional ambits in order to understand the categoriesfound in the fields of childhood and adolescence in difficult and precarious conditions. The strong relation between risk factors, neglect and margination has been analysed from this point of view. In the same way the interpretations that hold the minor himself responsible for his maladjustment are rejected and the author defends the necessity of a socio-educational intervention, which reduces the risk factors in the child's environment, and the need of paying close attention to the child's main role in this process.El artículo realiza una aproximación a las interpretaciones del concepto de riesgo social de la infancia por parte de diversos autores de ámbito estatal, teniendo también en cuenta los marcos legales catalán y español. Pretende aclarar cuáles son los criterios valorativos utilizados, tanto desde el ámbito academico como profesional, para interpretar las categorizaciones de la infancia en procesos de dificultad y precariedad. Desde esta perspectiva, se analiza la estrecha relación entre factores de riesgo, desamparamiento y marginación. Se rechazan las interpretaciones que responsabilizan al propio menor de la desadaptación y se defiende la hipótesis de la necesidad de una intervención socioeducativa que trabaje para una disminución de los factores de riesgo en el propio medio, manteniendo su protagonismo en este proceso
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