47,591 research outputs found
Small Data Archives and Libraries
Preservation is important for documenting original observations, and existing data are an important resource which can be re-used. Observatories should set up electronic data archives and formulate archiving policies. VO (Virtual Observatory) compliance is desirable; even if this is not possible, at least some VO ideas should be applied. Data archives should be visible and their data kept on-line. Metadata should be plentiful, and as standard as possible, just like file formats. Literature and data should be cross-linked. Libraries can play an important role in this process. In this paper, we discuss data archiving for small projects and observatories. We review the questions of digitization, cost factors, manpower, organizational structure and more
Small data global regularity for half-wave maps
We formulate the half-wave maps problem with target and prove global
regularity in sufficiently high spatial dimensions for a class of small
critical data in Besov spaces
Neural nets - their use and abuse for small data sets
Neural nets can be used for non-linear classification and regression models. They have a big advantage
over conventional statistical tools in that it is not necessary to assume any mathematical form for the
functional relationship between the variables. However, they also have a few associated problems chief of
which are probably the risk of over-parametrization in the absence of P-values, the lack of appropriate
diagnostic tools and the difficulties associated with model interpretation. The first of these problems is
particularly important in the case of small data sets. These problems are investigated in the context of real
market research data involving non-linear regression and discriminant analysis. In all cases we compare
the results of the non-linear neural net models with those of conventional linear statistical methods. Our
conclusion is that the theory and software for neural networks has some way to go before the above
problems will be solved
The lifespan of small data solutions to the KP-I
We show that for small, localized initial data there exists a global solution
to the KP-I equation in a Galilean-invariant space using the method of testing
by wave packets.Comment: 20 pages, minor update
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