10,190 research outputs found
Getting Ahead or Losing Ground: Economic Mobility in America
Combines earlier research to present a comprehensive analysis of relative mobility, absolute mobility, and changes in income inequality. Focuses on intergenerational mobility, immigrants, comparisons by gender and race, and the role of education
Inflation meets neutrinos
Constraints on inflationary models typically assume only the standard models
of cosmology and particle physics. By extending the neutrino sector to include
a new interaction with a light scalar mediator (MeV), it is
possible to relax these constraints, in particular via opening up regions of
the parameter space of the spectral index . These new interactions can be
probed at IceCube via interactions of astrophysical neutrinos with the Cosmic
Neutrino Background for nearly all of the relevant parameter space.Comment: 9 pages, 4 figures, comments welcom
Good internal communication increases productivity
Internal communication has become an important factor in today's business world. The increased use of electronic media can, despite their obvious advantages, cause communication problems, i.e. information overload. By avoiding communication problems, the productivity of a company can be increased. The relation between internal communication and productivity has been subject of a number of surveys. Although different survey approaches have been used, all found that there is a positive impact of communication on productivity. Since different communication dimensions have a different impact on an employee's perceived productivity, effective and efficient internal communication has to be managed, therefore, in accordance with the situation of each company and its employees. -- In der heutigen GeschĂ€ftswelt gewinnt interne Kommunikation als Wettbewerbsfaktor eine zunehmende Bedeutung. Die vermehrte Anwendung von elektronischen Medien kann jedoch trotz ihrer Vorteile auch zu Kommunikationsproblemen, speziell zu Informationsflut, fĂŒhren. Indem Kommunikationsprobleme vermieden werden, ist es möglich im Unternehmen die ProduktivitĂ€t zu erhöhen. Dieser Zusammenhang ist Gegenstand verschiedenster Studien, die trotz unterschiedlicher AnsĂ€tze alle einen positiven Einfluss von Kommunikation auf die ProduktivitĂ€t herausstellten. Aufgrund verschiedener Stellencharaktere und der damit verbundenen Nutzen bestimmter Informationen, beeinflussen vielfache Arten von Kommunikation die ProduktivitĂ€t von Angestellten unterschiedlich. Ebenso sind Unterschiede zwischen den Angestellten und verschiedenen Unternehmenstypologien zu verzeichnen. Folglich ist das Management von interner Kommunikation auf das spezielle Unternehmen und seine Mitarbeiter zuzuschneiden.Productivity,Internal Communication,Communication Methods,Communication Problems,Information Overload,ProduktivitĂ€t,Interne Kommunikation,Kommunikationsmethode,Kommunikationsprobleme,Informationsflut
The Discrete Markus-Yamabe Problem for Symmetric Planar Polynomial Maps
We probe deeper into the Discrete Markus-Yamabe Question for polynomial
planar maps and into the normal form for those maps which answer this question
in the affirmative. Furthermore, in a symmetric context, we show that the only
nonlinear equivariant polynomial maps providing an affirmative answer to the
Discrete Markus-Yamabe Question are those possessing Z2 as their group of
symmetries. We use this to establish two new tools which give information about
the spectrum of a planar polynomial map
The entropy of elliptical galaxies in Coma: a clue for a distance indicator
We have fitted the surface brightness of a sample of 79 elliptical galaxies
pertaining to the Coma cluster of galaxies using the Sersic profile. This model
is defined through three primary parameters: scale length (a), intensity
(\Sigma_0), and a shape parameter (\nu); physical and astrophysical quantities
may be computed from these parameters. We show that correlations are stronger
among primary parameters than the classical astrophysical ones. In particular,
the galaxies follow a high correlation in \nu and a parameters. We show that
the \nu and a correlation satisfies a constant specific entropy condition. We
propose to use this entropy relation as distance indicator for clusters.Comment: 5 pages, 3 figures, submitted to MNRAS Letter
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