64,394 research outputs found
L^2 Convergence of Certain Random Walks on Z^d and related Diffusions
No full textOne technique for studying the approach to equilibrium of a continuous time Markov process is to consider the restriction to the L^2 space of an invariant distribution. When the process is reversible with respect to this distribution, the generator is a selfadjoint operator. We study the L^2 spectrum of the generator for certain random walks on Z^d, where the reversible invariant distribution is concentrated near the origin and decays rapidly with distance to the origin. For the related diffusions on R^d we find that the generators are unitarily equivalent to Schrödinger operators
Rhipicephalus scalpturatus Santos Dias 1959
No full text68. Rhipicephalus scalpturatus Santos Dias, 1959. An Oriental species whose hosts are unknown. M: Santos Dias (1959) F: Santos Dias (1959) N: unknown L: unknown Redescriptions M: Walker et al. (2000) F: Walker et al. (2000)Published as part of Guglielmone, Alberto A., Petney, Trevor N. & Robbins, Richard G., 2020, Ixodidae (Acari: Ixodoidea): descriptions and redescriptions of all known species from 1758 to December 31, 2019, pp. 1-322 in Zootaxa 4871 (1) on page 236, DOI: 10.11646/zootaxa.4871.1.1, http://zenodo.org/record/442334
Optimal Lojasiewicz-Simon Inequalities and Morse-Bott Yang-Mills Energy Functions
No full textFor any compact Lie group G, we prove that the Yang–Mills energy function obeys an optimal gradient inequality of Łojasiewicz–Simon type (exponent 1/2) near the critical set of flat connections on a principal G-bundle over a closed Riemannian manifold of dimension d ≥ 2 and so its gradient flow converges at an exponential rate to that critical set. We establish this optimal Łojasiewicz–Simon gradient inequality by three different methods. Our first proof gives the most general result by direct analysis and relies on our extension of a theorem due to Uhlenbeck [86] that gives existence of a flat connection on a principal G-bundle supporting a connection with L^d/2 -small curvature, existence of a Coulomb gauge transformation, and W^1,p Sobolev distance estimates for p > 1. Our second proof proceeds by first establishing an optimal Łojasiewicz–Simon gradient inequality for abstract Morse–Bott functions on Banach manifolds, generalizing an earlier result due to the author and Maridakis [31, Theorem 4]. Our third proof establishes the optimal Łojasiewicz–Simon gradient inequality by direct analysis near a given flat connection that is a regular point of the curvature map. We prove similar results for the self-dual Yang–Mills energy function near regular anti-self-dual connections over closed Riemannian four-manifolds and for the full Yang–Mills energy function over closed Riemannian manifolds of dimension d ≥ 2, when known to be Morse–Bott at a given Yang–Mills connection
Rhipicephalus zumpti Santos Dias 1950
No full text85. Rhipicephalus zumpti Santos Dias, 1950b. An Afrotropical species whose adults have been found on Mammalia (several orders). Rhipicephalus zumpti is a very rare parasite of humans. M: Santos Dias (1950b) F: Walker et al. (2000) N: Walker et al. (2000) L: Walker et al. (2000) Redescriptions M: Walker et al. (2000), Horak et al. (2018) F: Horak et al. (2018) N: none L: none Note: this species is not accepted by Camicas et al. (1998), who treat this name as a synonym of Rhipicephalus planus.Published as part of Guglielmone, Alberto A., Petney, Trevor N. & Robbins, Richard G., 2020, Ixodidae (Acari: Ixodoidea): descriptions and redescriptions of all known species from 1758 to December 31, 2019, pp. 1-322 in Zootaxa 4871 (1) on page 242, DOI: 10.11646/zootaxa.4871.1.1, http://zenodo.org/record/442334
Erratum to: Effect of moderate red wine intake on cardiac prognosis after recent acute myocardial infarction of subjects with Type 2 diabetes mellitus (Diabetic Medicine, (2006), 23, 9, (974-981), 10.1111/j.1464-5491.2006.01886.x)
No full textIn an article by Marfella et al, the author name C. Saron is incorrect and should be listed as C. Sardu. Therefore the correct author list is: R. Marfella, F. Cacciapuoti, M. Siniscalchi, F. C. Sasso, F. Marchese, F. Cinone, E. Musacchio, M. A. Marfella, L. Ruggiero, G. Chiorazzo, D. Liberti, G. Chiorazzo, G. F. Nicoletti, C. Sardu, F. D'Andrea, C. Ammendola, M. Verza and L. Coppola.In an article by Marfella et al, the author name C. Saron is incorrect and should be listed as C. Sardu. Therefore the correct author list is: R. Marfella, F. Cacciapuoti, M. Siniscalchi, F. C. Sasso, F. Marchese, F. Cinone, E. Musacchio, M. A. Marfella, L. Ruggiero, G. Chiorazzo, D. Liberti, G. Chiorazzo, G. F. Nicoletti, C. Sardu, F. D'Andrea, C. Ammendola, M. Verza and L. Coppola
Amblyomma beaurepairei Vogelsang and Santos Dias 1953
No full text13. Amblyomma beaurepairei Vogelsang and Santos Dias, 1953a. A Neotropical species known only to parasitize Cingulata: Dasypodidae. M: Vogelsang and Santos Dias (1953a) F: Vogelsang and Santos Dias (1953a) N: unknown L: unknown Redescriptions: none Note: Kolonin (2009) treats Amblyomma beaurepairei as a synonym of Amblyomma auricularium, and Camicas et al. (1998) list Amblyomma beaurepairei as an alleged synonym of Amblyomma curruca, a tick also considered to be a synonym of Amblyomma auricularium here, although the status of Amblyomma curruca merits reevaluation in the opinion of Guglielmone et al. (2017).Published as part of Guglielmone, Alberto A., Petney, Trevor N. & Robbins, Richard G., 2020, Ixodidae (Acari: Ixodoidea): descriptions and redescriptions of all known species from 1758 to December 31, 2019, pp. 1-322 in Zootaxa 4871 (1) on page 84, DOI: 10.11646/zootaxa.4871.1.1, http://zenodo.org/record/442334
FIGURE 5. Leucospis rileyi A. Hind femur and tibia. L. santarema B. Hind femur and tibia. L. metatibialis C. Hind leg. L. poeyi D. Hind femur and tibia. L. affinis affinis E. Hind femur and tibia. L. pictipyga F. Hind leg. L. latifrons G. Hind leg. L. hopei H in The New World species of Leucospis Fabricius, 1775 (Hymenoptera, Chalcidoidea, Leucospidae): an update of Bouček's revision with description of two new species from Brazil
No full textFIGURE 5. Leucospis rileyi A. Hind femur and tibia. L. santarema B. Hind femur and tibia. L. metatibialis C. Hind leg. L. poeyi D. Hind femur and tibia. L. affinis affinis E. Hind femur and tibia. L. pictipyga F. Hind leg. L. latifrons G. Hind leg. L. hopei H. Hind leg with white, black and red (dotted) colour indicated. L. pinna I. Propodeum, lateral view. L. manaica J. Hind leg. Figure I modified from Grissell and Cameron (2002, fig. 5); figures A–H, J modified from Bouček (1974a, figs 41, 43, 113, 60, 61, 54, 58, 45, 69).Published as part of Lima, Alessandro Rodrigues & Dias, Priscila Guimarães, 2018, The New World species of Leucospis Fabricius, 1775 (Hymenoptera, Chalcidoidea, Leucospidae): an update of Bouček's revision with description of two new species from Brazil, pp. 1-45 in Zootaxa 4441 (1) on page 12, DOI: 10.11646/zootaxa.4441.1.1, http://zenodo.org/record/129796
Uma metáfora do Brasil: o Bem Amado e a teledramaturgia de Dias Gomes
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas. Programa de Pós-Graduação em Sociologia Política.O Objetivo deste trabalho consiste em procurar analisar a rede de signos e símbolos, presente no pensamento social de Dias Gomes, acerca do tema da identidade nacional, detendo-se, principalmente, na análise de sua telenovela O Bem-Amado. Na história da teledramaturgia brasileira, o folhetim é paradigmático, por representar o momento de incorporação de temas relacionados à cultura brasileira. Concomitante a esse retrato do Brasil que as telenovelas passam a veicular, a partir do final da década de 60 e início da década de 70, observamos o progressivo crescimento da Rede Globo e sua consolidação enquanto rede de abrangência nacional e importante veículo de integração nacional
FIGURE 6. Leucospis egaia A. Hind leg. L. speifera B. Hind leg. L. mexicana C. Hind leg. L. bulbiventris D. Hind leg. L. leptomera E. Hind leg. L. desantisi F. Hind femur and tibia. G in The New World species of Leucospis Fabricius, 1775 (Hymenoptera, Chalcidoidea, Leucospidae): an update of Bouček's revision with description of two new species from Brazil
No full textFIGURE 6. Leucospis egaia A. Hind leg. L. speifera B. Hind leg. L. mexicana C. Hind leg. L. bulbiventris D. Hind leg. L. leptomera E. Hind leg. L. desantisi F. Hind femur and tibia. G. Apex of hind tibia. L. auripyga H. Apex of hind tibia. L. opalescens I. Apex of hind tibia. J. Hind leg. Figure E modified from Bouček (1974b, fig. 1), Figs A–D, F–J modified from Bouček (1974a, figs 74, 94, 106, 67, 90, 89, 87, 84, 83).Published as part of Lima, Alessandro Rodrigues & Dias, Priscila Guimarães, 2018, The New World species of Leucospis Fabricius, 1775 (Hymenoptera, Chalcidoidea, Leucospidae): an update of Bouček's revision with description of two new species from Brazil, pp. 1-45 in Zootaxa 4441 (1) on page 13, DOI: 10.11646/zootaxa.4441.1.1, http://zenodo.org/record/129796
On the Construction of Higgs Sectors
No full textThe problem of constructing Higgs sectors, that is. finding Higgs representations and potentials that will produce a given spontaneous breakdown G → H (or hierarchy G → H → K...) is considered from a general point of view. The concepts of ordering of little groups, of little spaces and of symmetric algebras are shown to be of use, and it is also shown that in many cases a sum-of-squares potential can be very effective. A number of applications are presented and the pseudo-Goldstone problem is discussed
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