Large Deviations in the Superstable Weakly Imperfect Bose Gas

The superstable Weakly Imperfect Bose Gas {(WIBG)} was originally derived to solve the inconsistency of the Bogoliubov theory of superfluidity. Its grand-canonical thermodynamics was recently solved but not at {point of} the {(first order)} phase transition. This paper proposes to close this gap by using the large deviations formalism and in particular the analysis of the Kac distribution function. It turns out that, as a function of the chemical potential, the discontinuity of the Bose condensate density at the phase transition {point} disappears as a function of the particle density. Indeed, the Bose condensate continuously starts at the first critical particle density and progressively grows but the free-energy per particle stays constant until the second critical density is reached. At higher particle densities, the Bose condensate density as well as the free-energy per particle both increase {monotonously}

Photoluminescence properties of GaN grown on compliant silicon-on-insulator substrates

A compliant substrate approach has been employed to release lattice-mismatch caused strain in GaN epilayers through stress absorption in the substrate. GaN layers have been grown on silicon-on-insulator (SOI) substrates by low-pressure metalorganic chemical vapor deposition. Photoluminescence measurements at 4 K show the spectrum of grown GaN being dominated by UV emission around 3.47 eV related to neutral-donor bound excitons. The much weaker yellow luminescence shows a broad spectrum around 2.16 eV. Peak position of the UV emission changes both with measurement temperature and strain. At room temperature, the UV peak is red shifted by 64 meV corresponding well to the band-gap temperature dependence. Strain-induced blue shift of the peak, compared to unstrained GaN, is much less than for growth on sapphire, indicating strain relief in the GaN by growth on SOI. Further reduction of the blue shift is consistent with increased electron mobility. © 1997 American Institute of Physics.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/70808/2/APPLAB-71-26-3880-1.pd

Leintz gatzaga landslide: geotechnical analysis and monitorization with terrestial and radar techniques (eoslide project

[ES] La inestabilidad de ladera que afecta a la villa de Leintz Gatzaga (Gipuzkoa) y su entorno ha producido desde hace siglos daños estructurales en viviendas, muros y viales, que van desde moderados a intensos. Esto ha obligado a ejecutar diferentes actuaciones de reparación y consolidación. Se realiza en este trabajo una discusión geológico/geotécnica de los datos disponibles sobre el deslizamiento que afecta a la ladera, así como de los resultados obtenidos a partir de su monitorización con inclinómetros, piezómetros y fisurómetros en los últimos años. Complementariamente, este deslizamiento ha sido elegido como zona test del proyecto EOSLIDE, en el que se han desarrollado e implementado metodologías de vigilancia que combinan técnicas terrestres clásicas con Técnicas Avanzadas de Interferometría Diferencial Radar de Satélite (A-DInSAR), además de utilizar técnicas gravimétricas para la el estudio de estructuras bajo superficie. Se describen las actuaciones realizadas en el marco de este proyecto y los resultados obtenidos.[EN] Leintz Gatzaga village settles on a slope which whose instability has caused the former moderate to severe structural damages for centuries. Different remedial and consolidation solutions have been adopted in order to mitigate the landslide effects. In this work, we analyse and discuss the geological and geotechnical characteristics of the landslide, and the monotorization monitorization results obtained by inclinometers, piezometers and fisurometers in recent years. This landslide has been chosen as a test case to for the EOSLIDE project, which aims is to develop and implement surveillance methodologies combining classic terrestial techniques with Advanced Differential Radar Interferometry (A-DInSAR). Furthermore, gravimetric techniques have been applied in order to study subsoil structures. We describe the procedures and results obtained in within the framework of this project.Este trabajo se ha desarrollado en el marco del proyecto EOSLIDE del MINECO (IPT-2011-1234-310000) de la convocatoria INNPACTO 2011. La investigación de AGC, JFP y JF ha sido también parcialmente sufragada por los proyectos GEOSIR (AYA2010-17448) y AQUARISK (ESP2013-47780-C2-I-R) del MINECO.Peer reviewe

Mott transition in lattice boson models

We use mathematically rigorous perturbation theory to study the transition between the Mott insulator and the conjectured Bose-Einstein condensate in a hard-core Bose-Hubbard model. The critical line is established to lowest order in the tunneling amplitude.Comment: 20 page

The TF Limit for Rapidly Rotating Bose Gases in Anharmonic Traps

Starting from the full many body Hamiltonian we derive the leading order energy and density asymptotics for the ground state of a dilute, rotating Bose gas in an anharmonic trap in the ` Thomas Fermi' (TF) limit when the Gross-Pitaevskii coupling parameter and/or the rotation velocity tend to infinity. Although the many-body wave function is expected to have a complicated phase, the leading order contribution to the energy can be computed by minimizing a simple functional of the density alone

Deslizamiento de leintz gatzaga: instrumentación geotécnica y monitorización del movimiento con técnicas terrestres y espaciales.

La inestabilidad de ladera que afecta a la villa de Leintz Gatzaga (Gipuzkoa) y su entorno ha producido desde hace siglos daños estructurales en viviendas, muros y viales, que van desde moderados a intensos. Esto ha obligado a ejecutar diferentes actuaciones de reparación y consolidación. Se realiza en este trabajo una discusión geológico/geotécnica de los datos disponibles sobre el deslizamiento que afecta a la ladera, así como de los resultados obtenidos a partir de su monitorización con inclinómetros, piezómetros y ?surómetros en lo

Is there a rationale for the continuous infusion of cefepime? A multidisciplinary approach

This review is the fruit of multidisciplinary discussions concerning the continuous administration of β-lactams, with a special focus on cefepime. Pooling of the analyses and viewpoints of all members of the group, based on a review of the literature on this subject, has made it possible to test the hypothesis concerning the applicability of this method of administering cefepime. Cefepime is a cephalosporin for injection which exhibits a broader spectrum of activity than that of older, third-generation cephalosporins for injection (cefotaxime, ceftriaxone, ceftazidime). The specific activity of cefepime is based on its more rapid penetration (probably due to its zwitterionic structure, this molecule being both positively and negatively charged) through the outer membrane of Gram-negative bacteria, its greater affinity for penicillin-binding proteins, its weak affinity for β-lactamases, and its stability versus certain β-lactamases, particularly derepressed cephalosporinases. The stability of cefepime in various solutions intended for parenteral administration has been studied, and the results obtained demonstrated the good compatibility of cefepime with these different solutions. These results thus permit the administration of cefepime in a continuous infusion over a 24-h period, using two consecutive syringes

Symmetry of matrix-valued stochastic processes and noncolliding diffusion particle systems

As an extension of the theory of Dyson's Brownian motion models for the standard Gaussian random-matrix ensembles, we report a systematic study of hermitian matrix-valued processes and their eigenvalue processes associated with the chiral and nonstandard random-matrix ensembles. In addition to the noncolliding Brownian motions, we introduce a one-parameter family of temporally homogeneous noncolliding systems of the Bessel processes and a two-parameter family of temporally inhomogeneous noncolliding systems of Yor's generalized meanders and show that all of the ten classes of eigenvalue statistics in the Altland-Zirnbauer classification are realized as particle distributions in the special cases of these diffusion particle systems. As a corollary of each equivalence in distribution of a temporally inhomogeneous eigenvalue process and a noncolliding diffusion process, a stochastic-calculus proof of a version of the Harish-Chandra (Itzykson-Zuber) formula of integral over unitary group is established.Comment: LaTeX, 27 pages, 4 figures, v3: Minor corrections made for publication in J. Math. Phy

Crecimiento y mortalidad de la liseta ( Leporinus muyscorum , Steindachner, 1902) en el Río Sinú, Colombia.

Para estimar los parámetros de crecimiento y mortalidad de la Liseta (Leporinus muyscorum Steindacher, 1902) se aplicó el análisis de frecuencia de tallas (ELEFANT) a la información colectada en el período comprendido entre enero a diciembre de 2000 (n = 1698). Se midió la longitud total (LT), longitud horquilla (LH) y longitud estándar (LS) al milímetro más cercano; con talla mínima de 12.7 en octubre y máxima de 43.2 cm de LT en marzo, respectivamente. El intervalo de clase fue de 1 cm. Los valores estimados para L¥ K y to. Fueron 45.7 (± 0.14) cm, 0.29 (± 0.02) año –1 y 0.51 años, respectivamente, con temperatura media anual de 28ºC y límites de confianza del 95%. El índice de desempeño (ø’) arrojó un valor promedio de 2.78. Las ecuaciones de regresión obtenidas con límites de confianza al 95% fueron: LT = 1.06 (± 0.18) + 1.20 (± 0.01) LS; LT = 0.17 (± 0.14) + 0.01 LH y LH = 0.90 (± 0.13) + 1.04 (± 0.01)LS. La mortalidad total (Z) fue estimada en 1.82 (± 0.17) año -1 , la mortalidad natural (M) en0.71 año-1 y la mortalidad por captura (F) se calculó en 1.11 año –1 con 95% de confianza para los tres valores. La tasa de explotación (E = F/Z) estimada fue 0.61. La talla con que la liseta es reclutada a la pesquería (Lc) es de 22.4 cm LT, mientras que la talla media de captura (TMC) es de 2.5.8 cm LT. Los valores estimados para L¥ y K permiten afirmar que es un pez de longevidad y tasa de crecimiento medios. El índice de desempeño del crecimiento (ø’ = 2-78) es similar al valor de 2.62 reportado para Leporinus friderici en la Guyana Francesa. En el estudio se observan 1545 individuos (91%) capturados por debajo de la talla mínima de captura (25.0 cm LS = 31.1 cm (LT) establecida por el INPA, al igual que la TMC estimada en este trabajo. El valor de F (1.11), se traduce en un incremento en mortalidad total (Z = 1.82 a-1 ) y en la tasa de explotación (E = 0.61 a-1 ), valor que confirma la sobrepesca de la especie y concuerda con Valderrama & Vejarano (2001), quienes plantean que es una de las especies de la cuenca del Sinú que presenta niveles de riesgo

PMS20 Baseline Characteristics of Rheumatoid Arthritis Patients Starting Certolizumab Pegol Therapy And Glucocorticoid Prescription In The Eclair Study In 2012–2013

International audienc