Coulomb effects on the transport properties of quantum dots in strong magnetic field

We investigate the transport properties of quantum dots placed in strong magnetic field using a quantum-mechanical ' approach based on the 2D tight-binding Hamiltonian with direct Coulomb interaction and the Landauer-B\"{u}ttiker (LB) formalism. The electronic transmittance and the Hall resistance show Coulomb oscillations and also prove multiple addition processes. We identify this feature as the 'bunching' of electrons observed in recent experiments and give an elementary explanation in terms of spectral characteristics of the dot. The spatial distribution of the added electrons may distinguish between edge and bulk states and it has specific features for bunched electrons. The dependence of the charging energy on the number of electrons is discussed for strong and vanishing magnetic field. The crossover from the tunneling to quantum Hall regime is analyzed in terms of dot-lead coupling.Comment: 17 pages,8 figures,Revtex,submitted to Physical Review

Application of atmospheric pressure glow discharge (APGD) for deposition of thin silica like films on polymeric webs

Silica-like films were deposited on PEN and PET polymeric foils in atmospheric pressure glow discharge (APGD) in a roll-to-roll reactor open to ambient air. APGD was ignited in a mixture of inexpensive carrying gas argon and nitrogen with oxygen and hexamethyldisiloxane (HMDSO) precursor. The uniform diffuse glow in various gas mixtures was sustained by utilizing electronic stabilization network. APGD operation in air for a present setup was demonstrated. The contribution of different deposition mechanisms to the resulting silica-like film is discussed. The dependence of film structure and chemical composition on the conditions during deposition process was studied by means of SEM, ATR-FTIR and XPS analysis. The influence of oxidant concentration on the deposited film properties is analyzed and discussed

Application of atmospheric pressure glow discharge (APGD) for deposition of thin silica like films on polymeric webs

Silica-like films were deposited on PEN and PET polymeric foils in atmospheric pressure glow discharge (APGD) in a roll-to-roll reactor open to ambient air. APGD was ignited in a mixture of inexpensive carrying gas argon and nitrogen with oxygen and hexamethyldisiloxane (HMDSO) precursor. The uniform diffuse glow in various gas mixtures was sustained by utilizing electronic stabilization network. APGD operation in air for a present setup was demonstrated. The contribution of different deposition mechanisms to the resulting silica-like film is discussed. The dependence of film structure and chemical composition on the conditions during deposition process was studied by means of SEM, ATR-FTIR and XPS analysis. The influence of oxidant concentration on the deposited film properties is analyzed and discussed

Percepciones del consumidor sobre la carne de caprino en España

Se ha realizado una encuesta a consumidores (n=119) con el fin de conocer la percepción que tenían de la carne de caprino frente a la carne de ovino en función de diversos aspectos relacionados con la intención de compra y la percepción de su calidad. El cuestionario constó de 11 enunciados afirmativos, respondidos hedónicamente mediante una escala categórica de 7 puntos (1: “totalmente en desacuerdo”, 7: “totalmente de acuerdo”). El análisis de las respuestas se realizó mediante frecuencias. Los resultados obtenidos han demostrado, globalmente, una sensibilidad positiva hacia la carne de caprino tanto en parámetros decisivos a la hora de la intención de compra como en parámetros de calidad sensorial de la carne. Esto ha sucedido en contra de lo que podría pensarse dado, en nuestro país, el alto consumo y consideración de calidad que tiene la especie ovina.Comisión Interministerial de Ciencia y Tecnología AGL2005-05777- C02-01/GA

Influencia de la raza sobre la aceptabilidad en el hogar de la carne de cabrito y comparación con la especie ovina

Las razas autóctonas caprinas españolas de aptitud cárnica, aunque cuentan con un censo relativamente escaso (22.000 cabezas en pureza), cumplen una importante misión como agentes valorizadores de zonas y recursos marginales y suponen una importante reserva de nuestro patrimonio genético. Desgraciadamente, en muchos casos, ni el potencial productivo ni la calidad de sus productos están medianamente estudiados. De todas las especies de rumiantes que existen en España, la única que no posee ninguna marca de calidad es la especie caprina. La consecución de alguna distinción de este tipo podría ayudar a mejorar las rentas de los productores, a la propia subsistencia de las distintas agrupaciones y a la revalorización de la carne de esta especie. Por otra parte, existe la creencia de que los resultados de investigación que se pueden obtener con otras especies (bovino y ovino fundamentalmente) pueden ser fácilmente aplicables a las cabras, lo cual es definitivamente incierto debido a las múltiples especificidades de la especie caprina, incluyendo su carne (Sierra y Sañudo, 1987; Morand- Fehr y Lebbie, 2004). Por todo ello, se plantea el siguiente objetivo: Estudio de la apreciación global, por parte del consumidor en condiciones reales de cocinado en el hogar, de la calidad de la carne del cabrito de diversas razas caprinas en comparación con ovinos lechales, que podrían ser considerados como un producto de calidad de referencia.Comisión Interministerial de Ciencia y Tecnología (CICYT) AGL2005-05777-C02-01/GA

Factors influencing completion of multi-dose vaccine schedules in adolescents: a systematic review.

BACKGROUND: Completion of multiple dose vaccine schedules is crucial to ensure a protective immune response, and maximise vaccine cost-effectiveness. While barriers and facilitators to vaccine uptake have recently been reviewed, there is no comprehensive review of factors influencing subsequent adherence or completion, which is key to achieving vaccine effectiveness. This study identifies and summarises the literature on factors affecting completion of multi-dose vaccine schedules by adolescents. METHODS: Ten online databases and four websites were searched (February 2014). Studies with analysis of factors predicting completion of multi-dose vaccines were included. Study participants within 9-19 years of age were included in the review. The defined outcome was completion of the vaccine series within 1 year among those who received the first dose. RESULTS: Overall, 6159 abstracts were screened, and 502 full texts were reviewed. Sixty one studies were eligible for this review. All except two were set in high-income countries. Included studies evaluated human papillomavirus vaccine, hepatitis A, hepatitis B, and varicella vaccines. Reported vaccine completion rates, among those who initiated vaccination, ranged from 27% to over 90%. Minority racial or ethnic groups and inadequate health insurance coverage were risk factors for low completion, irrespective of initiation rates. Parental healthcare seeking behaviour was positively associated with completion. Vaccine delivery in schools was associated with higher completion than delivery in the community or health facilities. Gender, prior healthcare use and socio-economic status rarely remained significant risks or protective factors in multivariate analysis. CONCLUSIONS: Almost all studies investigating factors affecting completion have been carried out in developed countries and investigate a limited range of variables. Increased understanding of barriers to completion in adolescents will be invaluable to future new vaccine introductions and the further development of an adolescent health platform. PROSPERO reg# CRD42014006765

Ergotropy and entanglement in critical spin chains

A subsystem of an entangled ground state is in a mixed state. Thus, if we isolate this subsystem from its surroundings we may be able to extract work applying unitary transformations, up to a maximal amount which is called ergotropy. Once this work has been extracted, the subsystem will still contain some bound energy above its local ground state, which can provide valuable information about the entanglement structure. We show that the bound energy for half a free fermionic chain decays as the square of the entanglement entropy divided by the chain length, thus approaching zero for large system sizes, and we conjecture that this relation holds for all 1D critical states

Spin magnetization of strongly correlated electron gas confined in a two-dimensional finite lattice

The influence of disorder and interaction on the ground state polarization of the two-dimensional (2D) correlated electron gas is studied by numerical investigations of unrestricted Hartree-Fock equations. The ferromagnetic ground state is found to be plausible when the electron number is lowered and the interaction and disorder parameters are suitably chosen. For a finite system at constant electronic density the disorder induced spin polarization is cut off when the electron orbitals become strongly localized to the individual network sites. The fluctuations of the interaction matrix elements are calculated and brought out as favoring the ferromagnetic instability in the extended and weak localization regime. The localization effect of the Hubbard interaction term is discussed.Comment: 7 pages, 9 figure