OPTIMIZATION OF RFID SYSTEM COVERAGE IN A MANUFACTURING ENVIRONMENT

This paper compiles existing ideas, theories, and experiments across multiple disciplines to provide guidance for a company looking to implement an optimal RFID system in their production facility. The desire is to maximize the information received by the system while minimizing the cost. Four potential layouts of RFID antennas, two with overlapping antenna coverage and two with non-overlapping layouts, are first analyzed to understand the special coverage and the number of antennas required. The value of information is then quantified to determine whether higher coverage layouts are worth the additional costs associated with the higher number of antennas required. It was found that the non-overlapping network of antennas in a hexagonal lattice formation, which covers 90.7% of the production floor area, provides the highest amount of benefit when considering the system’s implementation costs. However, some companies prefer or even require a system that provides perfect information throughout the production process, so implementing an overlapping network may be considered optimal for some companies, even with the higher up front costs

Functional Dicer Is Necessary for Appropriate Specification of Radial Glia during Early Development of Mouse Telencephalon

Early telencephalic development involves transformation of neuroepithelial stem cells into radial glia, which are themselves neuronal progenitors, around the time when the tissue begins to generate postmitotic neurons. To achieve this transformation, radial precursors express a specific combination of proteins. We investigate the hypothesis that micro RNAs regulate the ability of the early telencephalic progenitors to establish radial glia. We ablate functional Dicer, which is required for the generation of mature micro RNAs, by conditionally mutating the Dicer1 gene in the early embryonic telencephalon and analyse the molecular specification of radial glia as well as their progeny, namely postmitotic neurons and basal progenitors. Conditional mutation of Dicer1 from the telencephalon at around embryonic day 8 does not prevent morphological development of radial glia, but their expression of Nestin, Sox9, and ErbB2 is abnormally low. The population of basal progenitors, which are generated by the radial glia, is disorganised and expanded in Dicer1-/- dorsal telencephalon. While the proportion of cells expressing markers of postmitotic neurons is unchanged, their laminar organisation in the telencephalic wall is disrupted suggesting a defect in radial glial guided migration. We found that the laminar disruption could not be accounted for by a reduction of the population of Cajal Retzius neurons. Together, our data suggest novel roles for micro RNAs during early development of progenitor cells in the embryonic telencephalon

The Global Professional Service Firm: ‘One Firm’ Models versus (Italian) Distant Institutionalized Practices

Through a historical case study of the internationalization of large English law firms in Italy, this paper uses Scott’s three pillars approach (2005) to look at how local institutions constrain and mediate the strategies and practices of professional services firms (PSFs). In doing so, it corrects the economic bias in the growing body of literature on the internationalization of PSFs by stressing how local regulations, norms and cultural frameworks affect the reproduction of home country practices, such as the one firm model pursued by large English law firms, in host-country jurisdictions. The paper also extends existing work on institutional duality (Kostova, 1999, Kostova and Roth, 2002) by developing a fine grained, micro level analysis which emphasizes the connections between institutions and practices. This is crucial, we contend, since the difficulties encountered by PSFs (and multinationals more generally) in their internationalization do not result from collisions between home- and host-country institutional structures per se, but between the diverse practices generated by distant institutional environments

Using the minimum description length to discover the intrinsic cardinality and dimensionality of time series

Many algorithms for data mining or indexing time series data do not operate directly on the raw data, but instead they use alternative representations that include transforms, quantization, approximation, and multi-resolution abstractions. Choosing the best representation and abstraction level for a given task/dataset is arguably the most critical step in time series data mining. In this work, we investigate the problem of discovering the natural intrinsic representation model, dimensionality and alphabet cardinality of a time series. The ability to automatically discover these intrinsic features has implications beyond selecting the best parameters for particular algorithms, as characterizing data in such a manner is useful in its own right and an important sub-routine in algorithms for classification, clustering and outlier discovery. We will frame the discovery of these intrinsic features in the Minimal Description Length framework. Extensive empirical tests show that our method is simpler, more general and more accurate than previous methods, and has the important advantage of being essentially parameter-free

Evolution and revolution: Anarchist geographies, modernity and poststructuralism

International audienceThis paper addresses the recent rediscovery of anarchist geographies and its implications in current debates on the ‘foundations’ of science and knowledge. By interrogating both recent works and original texts by early anarchist geographers who have greater influence on present-day literature such as Elisée Reclus (1830-1905) and Pyotr Kropotkin (1842-1921), I discuss the possible uses of a poststructuralist critique for this line of research by first challenging ‘postanarchist’ claims that so-called ‘classical anarchism’, allegedly biased by essentialist naturalism, should be entirely dismissed by contemporary scholarship. My main argument is that early anarchist geographers used the intellectual tools available in their day to build a completely different ‘discourse’, criticising the ways in which science and knowledge were constructed. As they openly contested ideas of linear progress, racism and European supremacy, as well as anthropocentrism and dichotomized definitions of ‘man’ and ‘nature’, it is hard to make them fit simplistic definitions. The body of work I address stresses their possible contributions to critical, anarchist and radical scholarship through their idea of knowledge, not limited to what is now called ‘discourse analysis’, but engaging with social movements in order to transform society