4,604 research outputs found
De menselijke factor in de bedrijfshuishouding en de bedrijfseconomische problematiek
This study deals with the human factor in business in relation to the problems in business economics. For a fruitful treatment we have been guided by a central principle. This principle, derived from the foundations of society-structure in the Western countries and introduced in business economics literature by Professor Dr J. L. Mey, has reference to the economic independent character of the business institution. ... Zie: Summary
Search for Boosted Dark Matter at ProtoDUNE
We propose the first experimental test of the inelastic boosted dark matter
hypothesis, capitalizing on the new physics potential with the imminent data
taking of the ProtoDUNE detectors. More specifically, we explore various
experimental signatures at the cosmic frontier, arising in boosted dark matter
scenarios, i.e., relativistic, inelastic scattering of boosted dark matter
often created by the annihilation of its heavier component which usually
comprises of the dominant relic abundance. Although features are unique enough
to isolate signal events from potential backgrounds, vetoing a vast amount of
cosmic background is rather challenging as the detectors are located on the
ground. We argue, with a careful estimate, that such backgrounds nevertheless
can be well under control by performing dedicated analyses after data
acquisition. We then discuss some phenomenological studies which can be
achieved with ProtoDUNE, employing a dark photon scenario as our benchmark
dark-sector model.Comment: Supplemental material include
The determination of integral closures and geometric applications
We express explicitly the integral closures of some ring extensions; this is
done for all Bring-Jerrard extensions of any degree as well as for all general
extensions of degree < 6; so far such an explicit expression is known only for
degree < 4 extensions. As a geometric application we present explicitly the
structure sheaf of every Bring-Jerrard covering space in terms of coefficients
of the equation defining the covering; in particular, we show that a degree-3
morphism f : Y --> X is quasi-etale if and only if the first Chern class of the
sheaf f_*(O_Y) is trivial (details in Theorem 5.3). We also try to get a
geometric Galoisness criterion for an arbitrary degree-n finite morphism; this
is successfully done when n = 3 and less satifactorily done when n = 5.Comment: Advances in Mathematics, to appear (no changes, just add this info
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