645,114 research outputs found
Lagrangians with electric and magnetic charges of N=2 supersymmetric gauge theories
General Lagrangians are constructed for N=2 supersymmetric gauge theories in
four space-time dimensions involving gauge groups with (non-abelian) electric
and magnetic charges. The charges induce a scalar potential, which, when the
charges are regarded as spurionic quantities, is invariant under
electric/magnetic duality. The resulting theories are especially relevant for
supergravity, but details of the extension to local supersymmetry will be
discussed elsewhere. The results include the coupling to hypermultiplets.
Without the latter, it is demonstrated how an off-shell representation can be
constructed based on vector and tensor supermultiplets.Comment: 34 pages, LaTe
Generalized gaugings and the field-antifield formalism
We discuss the algebra of general gauge theories that are described by the
embedding tensor formalism. We compare the gauge transformations dependent and
independent of an invariant action, and argue that the generic transformations
lead to an infinitely reducible algebra. We connect the embedding tensor
formalism to the field-antifield (or Batalin-Vilkovisky) formalism, which is
the most general formulation known for general gauge theories and their
quantization. The structure equations of the embedding tensor formalism are
included in the master equation of the field-antifield formalism.Comment: 42 pages; v2: some clarifications and 1 reference added; version to
be published in JHE
One-count memory circuit prevents machine mode interaction
One-count memory logic circuit used with electromechanical counter-printer machines operates in either count or print mode. The circuit advances the counter when the machine is in the count mode and provides storage for the count pulse when the machine is in the print mode
Critical Ising model and spanning trees partition functions
We prove that the squared partition function of the two-dimensional critical
Ising model defined on a finite, isoradial graph , is equal to
times the partition function of spanning trees of the graph
, where is the graph extended along the boundary; edges
of are assigned Kenyon's [Ken02] critical weights, and boundary edges of
have specific weights. The proof is an explicit construction,
providing a new relation on the level of configurations between two classical,
critical models of statistical mechanics.Comment: 38 pages, 26 figure
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The four powers of design: A value model in design management
This analysis proposes a framework to bridge the gap between the world of designers and the world of managers. Illuminating her thesis with examples from Steelcase, Decathlon, and other companies, Brigitte Borja de Mozota parallels design's ability to differentiate, integrate, transform, and contribute to the enterprise and bottom-line results with a corporate focus on markets, processes, talent, and finances
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Design and competitive edge: A model for design management excellence in European SME's
This article suggests to use the conceptual model of Michael Porter Value Chain in order to integrate all the variables that explain the mechanism of value creation through design.
The results of the study of 33 European SMES participating in the European Design Prize explain the role of design in the management of innovation, identify the variables that characterize design management and classify them according to the value chain concept.
The main result of this research was the typology of design management strategy.
Three clusters emerged through the analysis and the managerial value of design was demonstrated
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