3,880 research outputs found
Multi-Strings on AdS_3 x S^3 from Matrix String Theory
We analyze the Coulomb branch of Matrix string theory in the presence of
NS5-branes. If we regard the components of U(1) gauge fields as the dualized
longitudinal coordinates, we obtain the symmetric product of AdS_3 x S^3 x R^4
as the geometry of Coulomb branch. We observe that the absence or presence of
the nonzero electric flux determines whether the string propagates in bulk as
an ordinary closed string or is forced to live near the boundary.
We further discuss the issues of the physical spectrum from the viewpoint of
Matrix string theory. We show that the twisted sectors of CFT on the symmetric
orbifold, which correspond to glued strings, turn out to yield many chiral
primaries that were hitherto considered to be missing. We also comment on the
threshold energy in Liouville sector where continuous spectrum begins.Comment: 19pages, no figures, LaTeX; minor correction
Web API for biology with a workflow navigation system
DNA Data Bank of Japan (DDBJ) provides Web-based systems for biological analysis, called Web APIs for biology (WABI). So far, we have developed over 20 SOAP services and several workflows that consist of a series of method invocations. In this article, we present newly developed services of WABI, that is, REST-based Web services, additional workflows and a workflow navigation system. Each Web service and workflow can be used as a complete service or a building block for programmers to construct more complex information processing systems. The workflow navigation system aims to help non-programming biologists perform analysis tasks by providing next applicable services on Web browsers according to the output of a previously selected service. With this function, users can apply multiple services consecutively only by following links without any programming or manual copy-and-paste operations on Web browsers. The listed services are determined automatically by the system referring to the dictionaries of service categories, the input/output types of services and HTML tags. WABI and the workflow navigation system are freely accessible at http://www.xml.nig.ac.jp/index.html and http://cyclamen.ddbj.nig.ac.jp/, respectively
Anomalous Anisotropic Magnetoresistance in Heavy-Fermion PrFe4P12
We have investigated the anisotropy of the magnetoresistance in the Pr-based
HF compound PrFe4P12. The large anisotropy of effective mass and its strong
field dependence have been confirmed by resistivity measurements. Particularly
for H||[111], where the effective mass is most strongly enhanced, the non-Fermi
liquid behavior has been observed. Also, we have found the angular dependence
of the magnetoresistance sharply enhanced at H||[111], which is evidently
correlated with both the non-Fermi liquid behavior and the high-field ordered
state (B-phase).Comment: 3 pages, 3 figures. J. Phys. Soc. Jpn. Vol.77, No.8, in pres
- …