4,906 research outputs found
Site-centered impurities in quantum spin chains
The magnetic behavior of antiferromagnetic spin 1/2 chains with site-centered
impurities in a magnetic field is investigated. The effect of impurities is
implemented by considering different situations of both diagonal and
off-diagonal disorder. The resulting magnetization curves present a wide
variety of plateaux, whose position strongly depends on the kind of disorder
considered. The relevance of these results to experimental situations is also
discussed.Comment: 6 pages, 6 figure
Creating agent platforms to host agent-mediated services that share resources
After a period where the Internet was exclusively filled with content,
the present
efforts are moving towards services, which handle the raw information to
create
value from it. Therefore labors to create a wide collection of
agent-based services
are being perfomed in several projects, such as Agentcities does.
In this work we present an architecture for agent platforms named
a-Buildings. The
aim of the proposed architecture is to ease the creation, installation,
search and
management of agent-mediated services and the share of resources among
services.
To do so the a-Buildings architecture creates a new level of abstraction
on top of
the standard FIPA agent platform specification.
Basically, an a-Building is a service-oriented platform which offers a
set of
low level services to the agents it hosts. We define low level services
as those
required services that are neccesary to create more complex high level
composed
services.Postprint (published version
The Economic Loss Rule and Missed Opportunities: How to Keep Kentucky from Drowning in a Sea of Tort
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