187,206 research outputs found

    A Remark on Configuration Spaces of Two Points

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    We prove a homotopy invariance result for a certain covering space of the space of ordered configurations of two points in M x X where M is a closed smooth manifold and X is any fixed aspherical space which is not a point

    GreenCrowd: Toward a Holistic Algorithmic Crowd Charging Framework

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    Crowd charging represents an alternative peer-to-peer energy replenishment option for mobile users to align with the circular economy paradigm. Following this option, users bound by finite resource capacity utilize the energy from external to the crowd wireless or wired energy sources (such as shared chargers), and internal to the crowd energy sources (such as mobile devices, via wireless power transfer). If designed carefully, such utilization can boost the energy availability of users and provide energy ubiquitously to their devices for making them functional for longer. This article proposes the GreenCrowd framework, introducing a privacy-by-design in the digital domain crowd charging process, the architecture of which incorporates multiple crowd-* components, such as online social information exploitation, algorithmic battery aging mitigation, user reward mechanisms, and advanced decision making. The primary aim of article is to present the technological and applicative requirements and constraints of GreenCrowd, and provide practical evidence on its feasibility

    La révolution russe par Marcel Liebman, Editions Marabout Université, Paris, 1967

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    Raptis Michel. La révolution russe par Marcel Liebman, Editions Marabout Université, Paris, 1967. In: Autogestion : études, débats, documents, N°4, 1967. p. 178

    Must fermentation progress monitoring by polymer coated capacitive vapour sensor arrays

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    The present work deals with the task of monitoring the fermentation progress of grape must with a gas sensor array, without the use of pre-concentrator steps. The sensor array consists of eighrt interdigitated capacitors, coated with different polymeric materials through a well, formatted around the capacitor. The fermentation process of a particular must was duplicated under laboratory conditions and monitored in terms of (a) standard chemical analysis and (b) the response of the sensor array to the headspace of must samples, on a daily basis. PCA analysis revealed that a successful fermentation follows a distinct curve not related to that obtained from a series of equivalent pure ethanol solutions ©2009 IEEE

    Polymer coated microfabricated interdigitated electrodes arrays for gas sensing applications

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    InterDigitated Capacitive (IDC) sensor arrays are fabricated with conventional microelectronics-micromachining technologies on quartz substrates. After fabrication, a polymeric well is patterned around each IDC to precisely define the sensing area and thus deposit coatings of various polymers, by drop casting, in a reproducible and controlled manner. The gas sensing performance of the IDC array is presented for humidity and p-xylene.</jats:p

    Polymer/BaTiO3 nanocomposites based chemocapacitive sensors

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    The performance of novel capacitive sensors, based on PHEMA-BaTiO3 composite films, is presented. The changes in capacitance response upon exposure to various levels of humidity and ethanol vapor are studied in order to evaluate the effect of incorporated BaTiO3 on the sensitivity-selectivity of the sensors. © 2008 Elsevier B.V. All rights reserved

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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