1,721,281 research outputs found
Prefazione a G. Benedetti, Oggettività esistenziale dell'interpretazione. Studi su ermeneutica e diritto, Giappichelli, Torino 2014
No full textA method for building simple physical models: representing the structures of nucleic acid
No full textAn improved low-resoln. phys. model for representing the structures of nucleic acids in presented. The models are inexpensive and easy to construct and show flexibility in application
A graph-topological approach to recognition of pattern and similarity in RNA secondary structures
No full textSecondary and tertiary RNA structures play an important role in many biological
processes. Therefore the necessity arises to find similar higher-order structures
for different but functionally homologous RNA sequences. We propose here a
graph-topological approach to the problem, which shows two main features:
simplified graph representation which allows the recognition of similarity of RNA
secondary structures with the same branching look despite minor differences. This
allows comparison among foldings from different sequences, and "pruning" of the
secondary structures not shared by all the sequences since the early stages of
the search. (b) The graph representation is encoded by the Randić topological
index, and the search for the folding similarity is reduced to checking the
identity of single numbers. These characteristics make this approach
significantly different, less depending on empirical criteria, and less
computationally heavy then previous methods, where the folding consensus has been
measured by an alignment procedure or correlation of strings representing the
secondary structures. Some U2 snRNA and viroid sequences are studied by this
approach, which is imbedded in our previous search method based on genetic
algorithms
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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