Decay of flux vacua to nothing

We construct instanton solutions describing the decay of flux compactifications of a $6d$ gauge theory by generalizing the Kaluza-Klein bubble of nothing. The surface of the bubble is described by a smooth magnetically charged solitonic brane whose asymptotic flux is precisely that responsible for stabilizing the 4d compactification. We describe several instances of bubble geometries for the various vacua occurring in a $6d$ Einstein-Maxwell theory namely, AdS_4 x S^2, R^{1,3} x S^2, and dS_4 x S^2. Unlike conventional solutions, the bubbles of nothing introduced here occur where a {\em two}-sphere compactification manifold homogeneously degenerates.Comment: 31 pages, 15 figure

Notas sobre el género Entoloma en el noroeste de la Península Ibérica (IV): Entoloma legionense, una nueva especie del subgénero Leptonia

Notes about the genus Entoloma in the Northwest of the Iberian Peninsula (IV): Entoloma legionense, a new species of subgenus Leptonia. A new species of the genus Entoloma, found in León (Northwest of the Iberian Peninsula) is described. Entoloma legionense, sp. nov. differs from the most affine taxa of the subgenus Leptonia by the following combination of characters: stipe partially green-blackish, cheilocystidia frequently thick-walled, a more diverse in forms that in the neighbouring taxa, presence of encrusting pigment in numerous hyphae, presence of caulobasidia and caulocystidia and fructification on rotten wood of beech.Notas sobre el género Entoloma en el Noroeste de la Península Ibérica (IV): Entoloma legionense, una nueva especie del subgénero Leptonia. Se describe una especie nueva del género Entoloma, encontrada en León (Noroeste de la Península Ibérica). Entoloma legionense, sp. nov. se diferencia de los taxones más próximos del subgénero Leptonia en el que se encuadra, por presentar la siguiente combinación de caracteres: estipe parcialmente verdenegruzco, queilocistidios frecuentemente de pared gruesa, con una mayor diversidad de formas respecto a los taxones más cercanos, presencia de pigmento incrustante en numerosas hifas, presencia de caulobasidios y caulocistidios y fructificación sobre madera de haya, en descomposición

Cheimonophyllum pontevedrense, a new species found in the northwest of the Iberian Peninsula

A full description is given of Cheimonophyllum pontevedrense, a new species found in Galicia (NW of the Iberian Peninsula). After a review of the species currently included in this genus, we concluded that this taxon does not correspond to any of the species known so far and, consequently, we describe it as a new species. Morphological description and drawings of macro- and microscopic characters of the basidiomata are presented. A key, an amendment of original diagnose of Cheimonophyllum and a discussion about the taxa of this genus are provided.Se describe Cheimonophyllum pontevedrense, una nueva especie encontrada en Galicia (NW de la Península Ibérica). Tras una revisión de las otras especies de este género, hemos concluido que este taxón no se corresponde con ninguna de las especies conocidas, por lo que se describe aquí como una nueva especie. Se presenta una descripción morfológica e iconográfica de este taxón. Se adjunta una clave, una modificación de la diagnosis del género Cheimonophyllum y una discusión sobre los taxones encuadrados en este género

Controlled release nanoparticulate matter delivery system

A controlled release nanoparticulate matter delivery system includes a plurality of thermoresponsive modules containing a respective nanoparticulate matter. Each thermoresponsive module is selectively operable in at least one of a heating mode that releases the nanoparticulate matter and a cooling mode that inhibits release of the nanoparticulate matter. A control module is in electrical communication with the plurality of thermoresponsive modules. The control module is configured to determine a temperature of each thermoresponsive module and to select the at least one heating mode and cooling mode based on the temperature. The heating and cooling mode may be selected in response to a desired dosing profile and/or a biometric condition.Board of Regents, University of Texas Syste

Project management : learning by breaking the rules

The paper explores project management in action in a large public research organisation – NLAT which decided to change its internal organisation from team-based to project-based organisation a few years ago. A systematic and comparative analysis of 8 projects reveals that adherence to the ISO 9000’s standardized rules of project management - specific staffing and project leaders, definition of milestones ex ante, procedure manuals, and formalized learning accumulation mechanisms - had little to do with the organisations success over recent years: Looking for explanations for this success, the paper focuses on the process of transferring from one project to another, enhancing organisational learning through rules breaking. We identify three elements which encourage the accumulation of knowledge and competencies, as organisational learning: low project core staffing levels which stimulates the circulation of engineers and researchers between projects and blurs project boundaries, implementing and managing thematic projects which build on specific competencies developed in dedicated projects and encouraging ‘bricolage’ to hybridise project management with traditional hierarchical management practices.PROJECT MANAGEMENT;R&D;HIGH TECH;MANAGEMENT PRACTICES

Field theory simulation of Abelian-Higgs cosmic string cusps

We have performed a lattice field theory simulation of cusps in Abelian-Higgs cosmic strings. The results are in accord with the theory that the portion of the strings which overlaps near the cusp is released as radiation. The radius of the string cores which must touch to produce the evaporation is approximately $r = 1$ in natural units. In general, the modifications to the string shape due to the cusp may produce many cusps later in the evolution of a string loop, but these later cusps will be much smaller in magnitude and more closely resemble kinks.Comment: 9 pages, RevTeX, 13 figures with eps

Cosmic String Cusps with Small-Scale Structure: Their Forms and Gravitational Waveforms

We present a method for the introduction of small-scale structure into strings constructed from products of rotation matrices. We use this method to illustrate a range of possibilities for the shape of cusps that depends on the properties of the small-scale structure. We further argue that the presence of structure at cusps under most circumstances leads to the formation of loops at the size of the smallest scales. On the other hand we show that the gravitational waveform of a cusp remains generally unchanged; the primary effect of small-scale structure is to smooth out the sharp waveform emitted in the direction of cusp motion.Comment: RevTeX, 8 pages. Replaced with version accepted for publication by PR

Cheimonophyllum pontevedrense, a new species found in the northwest of the Iberian Peninsula

A full description is given of Cheimonophyllum pontevedrense, a new species found in Galicia (NW of the Iberian Peninsula). After a review of the species currently included in this genus, we concluded that this taxon does not correspond to any of the species known so far and, consequently, we describe it as a new species. Morphological description and drawings of macro- and microscopic characters of the basidiomata are presented. A key, an amendment of original diagnose of Cheimonophyllum and a discussion about the taxa of this genus are provided.Se describe Cheimonophyllum pontevedrense, una nueva especie encontrada en Galicia (NW de la Península Ibérica). Tras una revisión de las otras especies de este género, hemos concluido que este taxón no se corresponde con ninguna de las especies conocidas, por lo que se describe aquí como una nueva especie. Se presenta una descripción morfológica e iconográfica de este taxón. Se adjunta una clave, una modificación de la diagnosis del género Cheimonophyllum y una discusión sobre los taxones encuadrados en este género

Notas sobre el género Entoloma en el noroeste de la Península Ibérica (IV): Entoloma legionense, una nueva especie del subgénero Leptonia

Notes about the genus Entoloma in the Northwest of the Iberian Peninsula (IV): Entoloma legionense, a new species of subgenus Leptonia. A new species of the genus Entoloma, found in León (Northwest of the Iberian Peninsula) is described. Entoloma legionense, sp. nov. differs from the most affine taxa of the subgenus Leptonia by the following combination of characters: stipe partially green-blackish, cheilocystidia frequently thick-walled, a more diverse in forms that in the neighbouring taxa, presence of encrusting pigment in numerous hyphae, presence of caulobasidia and caulocystidia and fructification on rotten wood of beech.Notas sobre el género Entoloma en el Noroeste de la Península Ibérica (IV): Entoloma legionense, una nueva especie del subgénero Leptonia. Se describe una especie nueva del género Entoloma, encontrada en León (Noroeste de la Península Ibérica). Entoloma legionense, sp. nov. se diferencia de los taxones más próximos del subgénero Leptonia en el que se encuadra, por presentar la siguiente combinación de caracteres: estipe parcialmente verdenegruzco, queilocistidios frecuentemente de pared gruesa, con una mayor diversidad de formas respecto a los taxones más cercanos, presencia de pigmento incrustante en numerosas hifas, presencia de caulobasidios y caulocistidios y fructificación sobre madera de haya, en descomposición

Pronounced genetic structure and low genetic diversity in European red-billed chough (Pyrrhocorax pyrrhocorax) populations

Conservation Genetics August 2015, Volume 16, Issue 4, pp 1011–1012 Erratum to: Pronounced genetic structure and low genetic diversity in European red-billed chough (Pyrrhocorax pyrrhocorax) populations Erratum to: Conserv Genet (2012) 13:1213–1230 DOI 10.1007/s10592-012-0366-6 In the original publication, Tables 3 and 6 were published with incorrect estimates of population heterozygosities. All other diversity statistics were correct as originally presented. Updated versions of Tables 3 and 6 with corrected heterozygosity estimates confirmed using Arlequin 3.5 (Excoffier and Lischer 2010) as in Dávila et al. (2014) are provided in this erratum. Discrepancies were minor for populations on the British Isles. The correct estimates for Spain are slightly larger than those reported for La Palma by Dávila et al. (2014), but this does not necessarily affect their interpretation that choughs on La Palma may have originated from multiple migration events. The original conclusion that chough populations on the British Isles have low genetic diversity compared to continental European populations remains and is now, in fact, strengthened.Peer reviewedPostprin