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Tracking Strategies (tracking + strategy)

Distribution by Scientific Domains

Engineering	75%

Selected Abstracts

Strategic Management Upside Down: Tracking Strategies at McGill University from 1829 to 1980

CANADIAN JOURNAL OF ADMINISTRATIVE SCIENCES, Issue 4 2003
Henry Mintzberg
A number of the fundamental premises of strategic management are put into question in a study that tracks the realized strategies of a prominent university over a century and an half. Amidst continual change in detail, there was remarkable stability in the aggregate, and nothing resembling quantum or revolutionary change in strategy ever occurred. This may be explained in some of the terms most popular in business today: "empowerment", "venturing", and especially "knowledge work". Thus, while the typical university may seem very different from the typical corporation, its behaviour may in fact contain sobering messages for the strategic management of businesses. Résumé Le present article suit, sur une periode de plus d'un siecle et demi, I'evolution des strategies d'une universite bien connue et remet en question un certain nombre de premisses elementaires de la gestion strategique. Au cæur d'incessants changements qui affectent les details, on note dans l'ensemble une remarquable stabilite et l'absence de tout changement global ou revolutionnaire dans la strategie. Cette situation peut s'expliquer par les termes les plus en vogue, de nos jours, dans le milieu d'affaires, a savoir: « autonomisation », « developpement commercial », et tout particulierement « travail intellectuel ». Donc, bien que l'universite type puisse paraitre bien distincte de la compagnie type, son comportement peut en fait contenir d'importants messages pour la gestion strategique des entreprises. [source]

Modeling three-dimensional crack propagation,A comparison of crack path tracking strategies

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, Issue 9 2008
P. Jäger
Abstract The development of a new finite element technique for the simulation of discontinuous failure phenomena in three dimensions is the key objective of this study. In contrast to the widely used extended finite element technique, we apply a purely deformation-based strategy based on an independent interpolation of the deformation field on both sides of the discontinuity. This method has been applied successfully for two-dimensional crack propagation problems in the past. However, when it comes to three-dimensional failure phenomena, it faces the same difficulties as the extended finite element method. Unlike in two dimensions, the characterization for the three-dimensional failure surface is non-unique and the tracking of the discrete crack can be performed in several conceptually different ways. In this work, we review the four most common three-dimensional crack tracking strategies. We perform a systematic comparison in terms of standard algorithmic quality measures such as mesh independency, efficiency, robustness, stability and computational cost. Moreover, we discuss more specific issues such as crack path continuity and integratability in commercial finite element packages. The features of the suggested crack tracking algorithms will be elaborated by means of characteristic benchmark problems in failure analysis. Copyright © 2008 John Wiley & Sons, Ltd. [source]

Adaptive directional-aware location update strategy

INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS, Issue 2 2004
Tracy Tung
Abstract In this paper, a new tracking strategy, the directivity-aware location updating scheme was developed to better utilize the distinct characteristics of individual users on travelling directions. In this new adaptive scheme, an optimal distance-based update threshold is selected according to the call-to-mobility ratio and a transitional directivity index, introduced to give indications of the mobile's travelling patterns. It is found that as far as mobility characteristics are concerned, the actual transitional direction of roaming mobiles plays a significant role in selecting the optimal threshold in addition to the usual perception about mobility rate. Its advantage becomes even more visible when an optimal threshold is not theoretically obtainable due to certain restrictions imposed by the network during times of high system loadings. Simulation results show that the additional information made available about roaming mobile's transitional directivity is critical to ensure that the best available sub-optimal threshold is realizable. Other advances in this paper include the simplification of existing Markovian movement model. With the improved model presentation, the number of states necessary to simulate such memoryless movements is reduced. Consequently, the computational complexity involved is also lessened. Copyright © 2004 John Wiley & Sons, Ltd. [source]