1,085 research outputs found
Knowledge Diffusion in R&D Groups: The Impact of Internet Technologies
判型:B5,æ˜å’Œ55å¹´7月12
Knowledge Diffusion in R&D Groups: The Impact of Internet Technologies
Knowledge flows are the lifeblood of any R&D organisation. These firms are increasingly
discovering that the knowledge they require is often located beyond their boundaries. In this paper,
we investigate how R&D groups acquire and diffuse external knowledge and the role Internet
technologies play in this process. The focus of our study is on the technological gatekeeper. Previous
studies have found that gatekeepers are key nodes in the innovation process. These sporadic
individuals have the skills to identify useful knowledge outside the firm and disseminate this among
their local colleagues. However, much of the seminal gatekeeper research has been conducted over
two decades ago. In the time since, there have been huge advances in ICT and especially Internet
technologies. These technologies have dramatically altered how knowledge workers source and share
their information. Our objective is to advance the gatekeeper theory into an era where the knowledge
worker is saturated with information. Using case study methods, we examine knowledge flows in the
R&D group of an Irish medical devices firm. Our results indicate that due to advances in Internet
technology, the traditional gatekeeper no longer exists to any great extent. Instead, the modern R&D
lab acquires and diffuses external knowledge through a combination of a ‘web gatekeeper’ and a
‘knowledge transformer.
Measurements and Variability of Arterial Blood Pressure and Heart Interval in Conscious and Anesthetized Dogs
No abstract availabl
Strong Coupling Corrections to the Ginzburg-Landau Theory of Superfluid ^{3}He
In the Ginzburg-Landau theory of superfluid He, the free energy is
expressed as an expansion of invariants of a complex order parameter. Strong
coupling effects, which increase with increasing pressure, are embodied in the
set of coefficients of these order parameter invariants\cite{Leg75,Thu87}.
Experiments can be used to determine four independent combinations of the
coefficients of the five fourth order invariants. This leaves the
phenomenological description of the thermodynamics near incomplete.
Theoretical understanding of these coefficients is also quite limited. We
analyze our measurements of the magnetic susceptibility and the NMR frequency
shift in the -phase which refine the four experimental inputs to the
phenomenological theory. We propose a model based on existing experiments,
combined with calculations by Sauls and Serene\cite{Sau81} of the pressure
dependence of these coefficients, in order to determine all five fourth order
terms. This model leads us to a better understanding of the thermodynamics of
superfluid He in its various states. We discuss the surface tension of
bulk superfluid He and predictions for novel states of the superfluid
such as those that are stabilized by elastic scattering of quasiparticles from
a highly porous silica aerogel.Comment: 9 pages, 7 figures, 2 table
AVEC 2011 – the first international Audio/Visual Emotion Challenge
Abstract. The Audio/Visual Emotion Challenge andWorkshop (AVEC 2011) is the first competition event aimed at comparison of multimedia processing and machine learning methods for automatic audio, visual and audiovisual emotion analysis, with all participants competing under strictly the same conditions. This paper first describes the challenge par-ticipation conditions. Next follows the data used – the SEMAINE corpus – and its partitioning into train, development, and test partitions for the challenge with labelling in four dimensions, namely activity, expectation, power, and valence. Further, audio and video baseline features are intro-duced as well as baseline results that use these features for the three sub-challenges of audio, video, and audiovisual emotion recognition
Concentration Dependence of the Effective Mass of He-3 Atoms in He-3/He-4 Mixtures
Recent measurements by Yorozu et al. (S. Yorozu, H. Fukuyama, and H.
Ishimoto, Phys. Rev. B 48, 9660 (1993)) as well as by Simons and Mueller (R.
Simons and R. M. Mueller, Czhechoslowak Journal of Physics Suppl. 46, 201
(1976)) have determined the effective mass of He-3 atoms in a He-3/He-4 mixture
with great accuracy. We here report theoretical calculations for the dependence
of that effective mass on the He-3 concentration. Using correlated basis
functions perturbation theory to infinite order to compute effective
interactions in the appropriate channels, we obtain good agreement between
theory and experiment.Comment: 4 pages, 1 figur
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