36,546 research outputs found
Le quartier "européen" de Bruxelles : Alex G. Papadopoulos, Urban Regimes and Strategies, Building Europe's Central Executive District in Brussels
No full textBoyer Jean-Claude. Le quartier "européen" de Bruxelles : Alex G. Papadopoulos, Urban Regimes and Strategies, Building Europe's Central Executive District in Brussels. In: Annales de Géographie, t. 106, n°597, 1997. p. 561
Sparse subgraphs for 2-connectivity in directed graphs
No full textLet G be a strongly connected directed graph. We consider the problem of computing the smallest strongly connected spanning subgraph of G that maintains the pairwise 2-vertex-connectivity of G, i.e., the 2-vertex-connected blocks of G (2VC-B). We provide linear-time approximation algorithms for this problem that achieve an approximation ratio of 6. Based on these algorithms, we show how to approximate, in linear time, within a factor of 6 the smallest strongly connected spanning subgraph of G that maintains respectively: both the 2-vertexconnected blocks and the 2-vertex-connected components of G (2VC-BC); all the 2-connectivity relations of G (2C), i.e., both the 2-vertexand the 2-edge-connected components and blocks. Moreover, we provide heuristics that improve the size of the computed subgraphs in practice, and conduct a thorough experimental study to assess their merits in practical scenarios
Le quartier "européen" de Bruxelles : Alex G. Papadopoulos, Urban Regimes and Strategies, Building Europe's Central Executive District in Brussels
No full textBoyer Jean-Claude. Le quartier "européen" de Bruxelles : Alex G. Papadopoulos, Urban Regimes and Strategies, Building Europe's Central Executive District in Brussels. In: Annales de Géographie, t. 106, n°597, 1997. p. 561
At the computer's edge. The value of virtual constructions to the interpretation of cultural heritage
No full textThe title of this paper is an adaptation of Ian Hodder’s notion that interpretation starts ‘at the trowel’s edge’ (1997), as excavations should be active, reflexive and multivocal practices, during which interpretation takes place as an inextricable part of our research. The process of interpretation is a complicated issue. It has engrossed most practitioners, and is closely related to the conceptualisation of the past as reflecting contemporary social and cultural experiences through the scrutiny of cultural heritage remains. Archaeological remains are under appreciated, as they can be accessed only by specialised audiences, and any finds are presented by means of conventional illustrations and comprehensive list of artefacts. Even the most common recording method in archaeology, i.e. fieldnotes, and the subsequent site reports, have been criticised (Hodder 1989) for their distance and impersonality, as well as their attempt to demonstrate objectivity by establishing rigorous classifications and complex terminologies. For that reason, different forms of media have been used in the interpretive processes, not only in scientific research, but also for providing varied levels of engagement with the archaeological datasets by the public
Killing-Yano equations with torsion, worldline actions and G-structures
No full textWe determine the geometry of the target spaces of supersymmetric non-relativistic particles with torsion and magnetic couplings, and with symmetries generated by the fundamental forms of G-structures for G = U(n), SU(n), Sp(n), Sp(n) center dot Sp(1), G(2) and Spin(7). We find that the Killing-Yano equation, which arises as a condition for the invariance of the worldline action, does not always determine the torsion coupling uniquely in terms of the metric and fundamental forms. We show that there are several connections with skew-symmetric torsion for G = U(n), SU(n) and G(2) that solve the invariance conditions. We describe all these compatible connections for each of the G-structures and explain the geometric nature of the couplings.</p
Maximally supersymmetric G-backgrounds of IIB supergravity
Full text linkWe classify the geometry of all supersymmetric IIB backgrounds which admit the maximal number of G-invariant Killing spinors. For compact stability subgroups G = G2, SU(3) and SU(2), the spacetime is locally isometric to a product Xn × Y10−n with n = 3, 4, 6, where Xn is a maximally supersymmetric solution of a n-dimensional supergravity theory and Y10−n is a Riemannian manifold with holonomy G. For non-compact stability subgroups, G = K ⋉ R8, K = Spin(7), SU(4), Sp(2), SU(2) × SU(2) and {1}, the spacetime is a pp-wave propagating in an eight-dimensional manifold with holonomy K. We find new supersymmetric pp-wave solutions of IIB supergravity.
30. N. G. Mavris et Ευ. A. Papadopoulos, Δωδεκανησιακὴ Λύρα. Τόμος πρῶτος, Κασιακὴ λύρα, ἤτοι δημώδης ποίησις καὶ μουσικὴ τῆς νήσου Κάσου. ; Michaïlidis Nouaros, Καρπαθιακὰ Μνημεῖα. Α΄, Δημοτικά τραγούδια Καρπάθου.
No full textPernot Hubert. 30. N. G. Mavris et Ευ. A. Papadopoulos, Δωδεκανησιακὴ Λύρα. Τόμος πρῶτος, Κασιακὴ λύρα, ἤτοι δημώδης ποίησις καὶ μουσικὴ τῆς νήσου Κάσου. ; Michaïlidis Nouaros, Καρπαθιακὰ Μνημεῖα. Α΄, Δημοτικά τραγούδια Καρπάθου.. In: Revue des Études Grecques, tome 43, fascicule 200-201, Avril-juin 1930. p. 238
Stakeholder dynamics and the implementation of process innovations: the case of Lean thinking in a UK NHS Hospital Trust
Full text linkThis paper addresses the dynamics and mechanisms underpinning the trajectories and outcomes of process innovation. It deploys actor-network theory to explore the role of emergent stakeholder dynamics and networks in shaping the trajectory and outcomes of a project to implement Lean thinking (Lean) in a theatres unit of a UK National Health Service hospital. It traces the process of network formation, stabilisation and maintenance over time, and shows that different meanings for Lean become manifest during the implementation process, manifested through the emergence and mobilisation of a global and a local network that interact with each other using the project as a negotiation space in order to achieve their diverse interests
The role of actor associations in understanding the implementation of lean thinking in healthcare
Full text linkPurpose: The importance of networks in effecting the outcomes of change processes is well-established in the literature. Whilst extant literature focuses predominantly on the structural properties of networks, our purpose is to explore the dynamics of network emergence that give rise to the outcomes of process interventions. We show how Actor Network Theory (ANT) may be used as a lens for interrogating the way in which management interventions play out in the complex organisational setting of a UK National Health Service Trust, providing insights for management of process change initiatives. Design/methodology/approach: This is a rich qualitative study in the Pathology Unit of a UK National Health Service Trust, using ANT as the theoretical lens for tracking the emergence and transformation of networks of individuals over the course of a management intervention to promote “lean thinking” for performance improvements.Findings: ANT is useful for explicitly tracking how organisational players shift their positions and network allegiances over time, and identifying objects and actions that are effective in engaging individuals in networks enabling transition to a lean process. It is important to attend to the dynamics of the process of change and devise appropriate timely interventions enabling actors to shift their own positions towards a desired outcome.Research limitations/implications: We make the case for using of theoretical frameworks developed outside the operations management to develop insights for designing process interventions.Originality/value: By understanding the role of shifting networks managers can use timely interventions during the process implementation to facilitate the transition to lean processes: e.g. using demonstrable senior leadership commitment and visual communication.<br/
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