10,025 research outputs found
THE FEDERAL AGRICULTURE IMPROVEMENT AND REFORM ACT OF 1996: COMMODITY AND CONSERVATION PROGRAMS
The Federal Agriculture Improvement and Reform Act contains major revisions in farm commodity programs. This paper summarizes the major provision of legislation. Because many program implementation rules must be developed, program participants are advised to consult their local office of the USDA Farm Service Agency for final program provisions.Agricultural and Food Policy,
A PREVIEW OF THE 1996 FARM PROGRAM PROVISIONS
The U.S. House of Representatives and Senate have written farm bills that contain major revisions in farm commodity programs. Differences in these bills, House bill HR 2854 and Senate bill S 1541, must now be resolved by a Conference Committee, approved by a final vote of both houses of Congress, and signed by the President. Though differences in the bills do exist, the bills contain many similar provisions that appear likely to be included in the final version of the bill. This paper summarizes the major provisions of these bills and identifies areas where differences must be resolved by the Conference Committee.Agricultural and Food Policy,
Further notes on the capture of a Carcharhinus leucas, in a northeastern Atlantic oceanic insular shelf, the Azores archipelago, Portugal
Copyright © 2006 SociĂ©tĂ© Française dâIchtyologie.In March 1993, a specimen of Carcharhinus leucas was captured by fishermen on the south coast of Te rceira Island, the Azores Archipelago. Its head was recovered and its jaws were preserved. This is the first capture of this species on an oceanic insular shelf in the Atlantic. The distribution of C. leucas in this ocean is commented.RĂSUMĂ: Note complĂ©mentaire sur la capture de Carcharhinus leucas (Carcharhinidae) dans une Ăźle ocĂ©anique de lâAtlantique nord-est, lâarchipel des Açores, Portugal. En mars 1993, un spĂ©cimen de Carcharhinus leucas a Ă©tĂ© capturĂ© par des pĂȘcheurs sur la cĂŽte sud de lâĂźle Terceira dans lâarchipel desAçores. Sa tĂȘte a Ă©tĂ© rĂ©cupĂ©rĂ©e et ses mĂąchoires prĂ©servĂ©es. Il sâagit de la premiĂšre capture de cette espĂšce sur une plateforme ocĂ©anique de lâAtlantique. La distribution de C. leucas dans cet ocĂ©an est commentĂ©e
Egg capsules of the little skate, Psammobatis extenta (Garman, 1913) (Chondrichthyes, Rajidae)
Topological interactions in systems of mutually interlinked polymer rings
The topological interaction arising in interlinked polymeric rings such as
DNA catenanes is considered. More specifically, the free energy for a pair of
linked random walk rings is derived where the distance between two segments
each of which is part of a different ring is kept constant. The topology
conservation is imposed by the Gauss invariant. A previous approach (M.Otto,
T.A. Vilgis, Phys.Rev.Lett. {\bf 80}, 881 (1998)) to the problem is refined in
several ways. It is confirmed, that asymptotically, i.e. for large
where is average size of single random walk ring, the effective
topological interaction (free energy) scales .Comment: 16 pages, 3 figur
Notes sur les habitudes alimentaires de Rioraja agassizi (Chondrichthyes, Rajidae) dans le sud du Brésil.
Copyright © 2011 SociĂ©tĂ© Française dâIchtyologie.Feeding habits of the skate Rioraja agassizi were analyzed in southeastern Brazil from samples obtained along SĂŁo Paulo coast. A total of 258 specimens were examined, ranging between 96 and 532 mm total length. About 57.85% were females and 42.15% were males, resulting in a 1:1.37 sex-ratio to females. From 223 stomachs collected (94 males and 129 females) empty stomachs represented only 1.4%. Nine prey categories were identified: Polychaeta, Copepoda, Cumacea, Isopoda, Gammaridea, Dendrobranchiata, Brachyura, Teleostei, and one non-animal category (nonidentifiable items). Crustaceans were the most important item, indicating that the species has a carcinophagic preference. The presence of fish was just verified in juveniles and some adult individuals, with predominance in summer. Sex, maturity stage and seasonality did not influence the feeding habits of the species.RĂSUMĂ: Les habitudes alimentaires de Rioraja agassizi on Ă©tĂ© analysĂ©es dans le sud-ouest du BrĂ©sil, tout au long de la cĂŽte de lâĂtat de SĂŁo Paulo. Au total, 258 exemplaires ont Ă©tĂ© examinĂ©s, leurs tailles variant entre 96 et 532 mm de longueur totale. Les femelles ont reprĂ©sentĂ© 57,85% de lâĂ©chantillon, conduisant Ă un sex-ratio secondaire de 1 : 1,37 en leur faveur. Sur 223 estomacs recueillis (94 mĂąles et 129 femelles) ceux qui Ă©taient vides reprĂ©sentaient seulement 1,4%. Neuf catĂ©gories de proies ont Ă©tĂ© identifiĂ©es: Polychaeta, Copepoda, Cumacea, Isopoda, Gammaridea, Dendrobranchiata, Brachyura, Teleostei, et des restes inorganiques (items non identifiables). Les crustacĂ©s sont la proie la plus importante, indiquant une prĂ©fĂ©rence carcinophage pour cette espĂšce. La prĂ©sence de poissons a Ă©tĂ© vĂ©rifiĂ©e seulement dans les estomacs de juvĂ©niles avec une prĂ©dominance durant les mois dâĂ©tĂ©. Aucune influence des variables âsexeâ, âmaturitĂ©â et âsaisonâ sur les habitudes alimentaires nâa Ă©tĂ© dĂ©tectĂ©e
The monoid of queue actions
We investigate the monoid of transformations that are induced by sequences of
writing to and reading from a queue storage. We describe this monoid by means
of a confluent and terminating semi-Thue system and study some of its basic
algebraic properties, e.g., conjugacy. Moreover, we show that while several
properties concerning its rational subsets are undecidable, their uniform
membership problem is NL-complete. Furthermore, we present an algebraic
characterization of this monoid's recognizable subsets. Finally, we prove that
it is not Thurston-automatic
Diffeomorphic random sampling using optimal information transport
In this article we explore an algorithm for diffeomorphic random sampling of
nonuniform probability distributions on Riemannian manifolds. The algorithm is
based on optimal information transport (OIT)---an analogue of optimal mass
transport (OMT). Our framework uses the deep geometric connections between the
Fisher-Rao metric on the space of probability densities and the right-invariant
information metric on the group of diffeomorphisms. The resulting sampling
algorithm is a promising alternative to OMT, in particular as our formulation
is semi-explicit, free of the nonlinear Monge--Ampere equation. Compared to
Markov Chain Monte Carlo methods, we expect our algorithm to stand up well when
a large number of samples from a low dimensional nonuniform distribution is
needed.Comment: 8 pages, 3 figure
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