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Träfflista för sökning "LAR1:cth ;pers:(Viberg Mats 1961);conttype:(refereed)"

Sökning: LAR1:cth > Viberg Mats 1961 > Refereegranskat

  • Resultat 1-10 av 152
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1.
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2.
  • Bohlin, Magnus (författare)
  • Traveling to Events
  • 2000
  • Ingår i: Evaluation of events: Scandinavian Experiences. - New York : Cognizant Communication Corporation. - 1882345401 ; , s. 13-29
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)
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5.
  • Cerratto-Pargman, Teresa, et al. (författare)
  • Understanding Limits from a Social-Ecological perspective
  • 2015
  • Ingår i: First Monday. - : University of Illinois Libraries. - 1396-0466. ; 20:8
  • Tidskriftsartikel (refereegranskat)abstract
    • The latest developments in the field of HCI have given rise to an increasing interest in issues pertaining to global warming, resource depletion and environmental degradation. Concern about such issues has contributed to give shape to the design space of sustainable HCI (SHCI); a space whose boundaries are at times blurred. On the one hand, some, design “sustainable” information technology based on visions of the world that do not really question limits to continuous economic growth and, on the other hand, others embrace the design of information technology from stances that acknowledges limits (i.e., economic, ecological, energetic). This paper introduces the perspective of social ecology into SHCI. This perspective provides us with a core set of principles that makes us situate computing at the intersection of physical (natural) and moral (human) qualities of our human environment systems. As such it confronts us with choices to be made in the challenging years to come and invites us to argue about the very purpose of information technology in a world of limitations.
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6.
  • Cerratto-Pargman, Teresa, et al. (författare)
  • User Centered Development of Automatic E-mail Answering for the Public Sector
  • 2012
  • Ingår i: Human-Computer Interaction, Tourism and Cultural Heritage. - Berlin, Heidelberg : Springer Berlin/Heidelberg. - 9783642339431 - 9783642339448 ; , s. 154-156
  • Konferensbidrag (refereegranskat)abstract
    • In Sweden, the use of e-mail by the public sector has become a key communication service between citizens and governmental authorities. Although the integration of e-mail in the public sector has certainly brought citizens and handling officers closer, it has also introduced a particular vision on governmental authorities such as for instance the idea that public service and information should be available to citizens any time, anywhere. Such a belief among citizens puts certainly high demands on the quality and efficiency of the e-service governmental authorities are capable to provide. In fact, the growing number of citizens’ electronic requests must be accurately answered in a limited time. In the research project IMAIL (Intelligent e-mail answering service for eGovernment) [1], we have focused on the work carried out at the Swedish Social Insurance Agency (SSIA) that exemplifies a governmental authority dealing with 500,000 emails per year on top of face-to face meetings, phone calls and chat communication. With the objective of creating an e-mail client capable to ease and ensure the quality of SSIAs’ handling officers public service, we have developed a prototype that: (1) automatically answer a large part of simple questions in the incoming e-mail flow, (2) improve the quality of the semi- automatic answers (i.e. answer templates), and finally, (3) reduce the workload for the handling officers. The development of the prototype is grounded in an empirical study conducted at the SSIA. The study comprises the analysis and clustering of 10,000 citizens e-mails and the working activity of 15 handling officers that were collected through questionnaires, interviews and workshops [2].
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7.
  • Chen, Lin, et al. (författare)
  • Tetranuclear Iron Complexes Bearing Benzenetetrathiolate Bridges as Four-Electron Transformation Templates and Their Electrocatalytic Properties for Proton Reduction
  • 2013
  • Ingår i: Inorganic Chemistry. - : American Chemical Society (ACS). - 0020-1669 .- 1520-510X. ; 52:4, s. 1798-1806
  • Tidskriftsartikel (refereegranskat)abstract
    • Two tetranuclear iron-sulfur complexes, (mu,mu-pbtt)[Fe-2(CO)(6)](2) (pbtt = benzene-1,2,4,5-tetrathiolato, 3) and (mu,mu-obtt)[Fe-2(CO)(6)](2) (obtt = benzene-1,2,3,4-tetrathiolato, 4), were prepared from reaction of Fe-3(CO)(12) and the corresponding tetramercaptobenzene in THF, respectively. Complexes 5 and 6, (mu,mu-pbtt)[Fe-2(CO)(5)L-1][Fe-2(CO)(5)L-2] (L-1 = CO, L-2 = PPyr(3) (Pyr = N-pyrrolyl), 5; L-1 = L-2 = PPyr(3), 6) were obtained by controlling CO displacement of 3 with PPyr(3). Molecular structures of 3-6 were determined by spectroscopic and single-crystal X-ray analyses. All-CO Fe4S4 complexes 3 and 4 each display four-electron reduction processes in consecutive chemically reversible two-electron reduction events with relatively narrow potential spans in the cyclic voltammograms. Phosphine-substituted Fe4S4 complexes 5 and 6 exhibit two consecutive two-electron reduction events, which are not fully reversible. The electrocatalytic properties of 3 and 4 for proton reduction were studied using a series of carboxylic acids of increasing strength (CH3COOH, CH2ClCOOH, CHCl2COOH, CCl3COOH, and CF3COOH). The mechanisms for electrochemical proton reduction to hydrogen catalyzed by complex 3 as a function of acid strength are discussed.
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  • Chen, Ming, 1972, et al. (författare)
  • Adaptive Channel Prediction Based on Polynomial Phase Signals
  • 2008
  • Ingår i: 2008 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP; Las Vegas, NV; United States; 31 March 2008 through 4 April 2008. - 1520-6149. - 9781424414840 ; , s. 2881-2884
  • Konferensbidrag (refereegranskat)abstract
    • Motivated by recently published physics based scattering SISO and MIMO channel models, a new adaptivechannel prediction using Kalman filter based on non-stationary polynomial phase signals with time-varying amplitudes is proposed. To mitigate the influence of the time-varying amplitudes on parameter estimation, an iterative estimation using the Non-linear instantaneous LS criterion is proposed, where the number of signal components and model orders are known. The new predictoroutperforms the classical Linear Prediction and stationarysinusoidal modeling based prediction in Monte Carlo simulations.
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10.
  • Chen, Mingming, et al. (författare)
  • Carbon anode in direct carbon fuel cell
  • 2010
  • Ingår i: International journal of hydrogen energy. - : Elsevier BV. - 0360-3199 .- 1879-3487. ; 35:7, s. 2732-2736
  • Tidskriftsartikel (refereegranskat)abstract
    • Direct carbon fuel cell (DCFC) is a kind of high temperature fuel cell using carbon materials directly as anode. Electrochemical reactivity and surface property of carbon were taken into account in this paper. Four representative carbon samples were selected. The most suitable ratio of the ternary eutectic mixture Li2CO3-K2CO3-Al2O3 was determined at 1.05:1.2:1(mass ration). Conceptual analysis for electrochemical reactivity of carbon anode shows the importance of (1) reactive characteristics including lattice disorder, edge-carbon ratio and the number of short alkyl side chain of carbon material, which builds the prime foundation of the anodic half-cell reaction; (2) surface wetting ability, which assures the efficient contact of anode surface with electrolyte. It indicates that anode reaction rate and DCFC output can be notably improved if carbon are pre-dispersed into electrolyte before acting as anode, due to the straightway shift from cathode to anode for CO32- provided by electrolyte soaked in carbon material.
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