21,462 research outputs found
Addiction, Genetics, and Criminal Responsibility
In light of the abundance of studies focusing on the genetic contributions to addiction, Morse develops a meaningful background on the legal and scientific images of behavior, the disease concept of addiction, and the aspects of addiction for which a person may be held legally accountable
Tableaux on k+1-cores, reduced words for affine permutations, and k-Schur expansions
The -Young lattice is a partial order on partitions with no part
larger than . This weak subposet of the Young lattice originated from the
study of the -Schur functions(atoms) , symmetric functions
that form a natural basis of the space spanned by homogeneous functions indexed
by -bounded partitions. The chains in the -Young lattice are induced by a
Pieri-type rule experimentally satisfied by the -Schur functions. Here,
using a natural bijection between -bounded partitions and -cores, we
establish an algorithm for identifying chains in the -Young lattice with
certain tableaux on cores. This algorithm reveals that the -Young
lattice is isomorphic to the weak order on the quotient of the affine symmetric
group by a maximal parabolic subgroup. From this, the
conjectured -Pieri rule implies that the -Kostka matrix connecting the
homogeneous basis \{h_\la\}_{\la\in\CY^k} to \{s_\la^{(k)}\}_{\la\in\CY^k}
may now be obtained by counting appropriate classes of tableaux on -cores.
This suggests that the conjecturally positive -Schur expansion coefficients
for Macdonald polynomials (reducing to -Kostka polynomials for large )
could be described by a -statistic on these tableaux, or equivalently on
reduced words for affine permutations.Comment: 30 pages, 1 figur
Tinodes species (Trichoptera: Psychomyiidae) from The People's Republic of China
Five species of the genus Tinodes from the People's Republic of China are described and re-described, among which four species are new to science. A key to males of all five species and a key to females of two species are given
Larvae of the three common North American species of Phylocentropus (Trichoptera: Dipseudopsidae)
The caddisfly genus Phylocentropus includes 7 extant species globally, of which 5 occur in eastern North America and 2 in eastern Asia. Larvae of the 3 most common North American species [Phylocentropus carolinus Carpenter, P. lucidus (Hagen), and P. placidus (Banks)] were associated with identifiable adults and diagnostic characters are described. Larvae ofthese 3 species may be distinguished by overall length of mature larvae, head color pattern, and number of spines on the hind tibiae. Larvae of other species of this genus are unknown
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