4,016 research outputs found
Rotating Boson Stars in 5 Dimensions
We study rotating boson stars in five spacetime dimensions. The boson fields
consist of a complex doublet scalar field. Considering boson stars rotating in
two orthogonal planes with both angular momenta of equal magnitude, a special
ansatz for the boson field and the metric allows for solutions with nontrivial
dependence on the radial coordinate only. The charge of the scalar field equals
the sum of the angular momenta. The rotating boson stars are globally regular
and asymptotically flat. For our choice of a sixtic potential the rotating
boson star solutions possess a flat spacetime limit. We study the solutions in
flat and curved spacetime.Comment: 17 pages, 6 figure
Solid state television camera system Patent
Solid state television camera system consisting of monolithic semiconductor mosaic sensor and molecular digital readout system
{DeepBlue} Epigenomic Data Server: {P}rogrammatic Data Retrieval and Analysis of Epigenome Region Sets
Large amounts of epigenomic data are generated under the umbrella of the International Human Epigenome Consortium, which aims to establish 1000 reference epigenomes within the next few years. These data have the potential to unravel the complexity of epigenomic regulation. However, their effective use is hindered by the lack of flexible and easy-to-use methods for data retrieval. Extracting region sets of interest is a cumbersome task that involves several manual steps: identifying the relevant experiments, downloading the corresponding data files and filtering the region sets of interest. Here we present the DeepBlue Epigenomic Data Server, which streamlines epigenomic data analysis as well as software development. DeepBlue provides a comprehensive programmatic interface for finding, selecting, filtering, summarizing and downloading region sets. It contains data from four major epigenome projects, namely ENCODE, ROADMAP, BLUEPRINT and DEEP. DeepBlue comes with a user manual, examples and a well-documented application programming interface (API). The latter is accessed via the XML-RPC protocol supported by many programming languages. To demonstrate usage of the API and to enable convenient data retrieval for non-programmers, we offer an optional web interface. DeepBlue can be openly accessed at http://deepblue.mpi-inf.mpg.de
Cyclicality and the Labor Market for Economists
Using a unique sample of new Ph.D. economists in 1987 and 1997, we examine how job
seekers and their employers alter their search strategies in strong versus weak markets. The
1987 academic market was strong while the 1997 market was much weaker. A multimarket
theory of optimal search suggests that job seekers will respond to a weakening market by
lowering their reservation utility. This in turn affects their search strategies at the extensive
margin (which markets to enter) and the intensive margin (how many applications to submit
per market). Meanwhile, employers respond to the weakening market by raising their hiring
standards. The combination of strategies on the supply and demand sides suggest that high
quality applicants will obtain an increased share of academic interviews in weak markets
while applicants from weaker schools will increasingly secure interviews outside of the
academic market. Empirical results show that in the bust market, graduates of elite schools
shifted their search strategies to include weaker academic institutions, while graduates of
lower ranked schools shifted their applications away from academia and toward the business
sector. In bust conditions, academic institutions increasingly concentrate their interviews on
elite school graduates, women and U.S. residents
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