Controlled photon transfer between two individual nanoemitters via shared high-Q modes of a microsphere resonator

We realize controlled cavity-mediated photon transfer between two single nanoparticles over a distance of several tens of micrometers. First, we show how a single nanoscopic emitter attached to a near-field probe can be coupled to high-Q whispering-gallery modes of a silica microsphere at will. Then we demonstrate transfer of energy between this and a second nanoparticle deposited on the sphere surface. We estimate the photon transfer efficiency to be about six orders of magnitude higher than that via free space propagation at comparable separations.Comment: accepted for publication in Nano Letter

Quality Management, Job-related Contentment and Performance: an empirical analysis of British workplaces

Purpose - This article investigates whether a quality management philosophy underlies the joint use of operations and human resource management practices, and the relationships with job-related contentment and performance. Design/ methodology/approach - Data from an economy-wide survey is used to test hypotheses via latent variable analyses (latent trait and latent class models) and structural equation models. The sensitivity of each path is then assessed using regression models. Findings – Different elements rather than a unified philosophy are identified. A managerial approach that integrates total quality management and just-in-time procedures is rare, but is associated with the quality of the product or service delivered. Labor productivity and quality are independent of the level of job-related contentment in the workplace. Although the average workforce is content, high involvement management and motivational support practices are associated with job anxiety. On the positive side, job enrichment is linked to labor productivity, thus suggesting potential gains through job design. Originality/value - The study adds evidence from a national sample about a comprehensive range of management practices, and suggests distinct outcomes from different elements of quality management. Additionally, it shows that performance expectations based on previous studies may not hold in large nationwide heterogeneous samples

Fluctuations in network dynamics

Most complex networks serve as conduits for various dynamical processes, ranging from mass transfer by chemical reactions in the cell to packet transfer on the Internet. We collected data on the time dependent activity of five natural and technological networks, finding that for each the coupling of the flux fluctuations with the total flux on individual nodes obeys a unique scaling law. We show that the observed scaling can explain the competition between the system's internal collective dynamics and changes in the external environment, allowing us to predict the relevant scaling exponents.Comment: 4 pages, 4 figures. Published versio

Optical limiting behavior of bismuth oxide-based glass in the visible range

The authors report experimental results on the optical limiting behavior of a bismuth oxide-based glass by exciting the samples with nanosecond laser pulses at 532 and 598 nm. The results show that two-photon and free-carrier absorption processes contribute for the nonlinear absorption. Values for β, the two-photon absorption coefficient, and σe, the absorption cross section due to free carriers, were determined. The values for β and σe are dependent on the amount of bismuth oxide in the glass composition

Implantação de sistemas agroflorestais com açaizeiros para recuperação de áreas degradadas com a utilização das técnicas do sistema bragantino no Estado do Pará.

Áreas utilizadas com cultivos agrícolas ou pastagens, que se encontram com sinais de degradação, podem ser recuperadas com o cultivo de açaizeiros (Euterpe oleracea Mart.) em sistemas agroflorestais. Com o objetivo de elaborar, validar e recomendar sistemas diversificados de produção capazes de recuperar áreas degradadas e serem eficazes quanto à produtividade, custo de produção e sustentabilidade ambiental, conduziram-se estudos em uma área com indícios de degradação ambiental no município de Inhangapi, Pará. A implantação do sistema agroflorestal consistiu inicialmente do plantio de mudas de açaizeiros e de culturas anuais e perenes, cujo solo foi corrigido e adubado. As culturas anuais foram implantadas utilizando-se as técnicas do sistema bragantino, que consistiu no plantio consorciado de mandioca e feijão-caupi, cuja função é produzir alimentos, recuperar a fertilidade do solo e amortizar os custos iniciais das culturas perenes. O sistema contemplou, também, no segundo ano, o plantio de mudas de cacaueiros e de essências florestais. Ao final do processo de implantação das culturas perenes é possível se verificar a formação de um sistema agroflorestal, caracterizado por um açaizal enriquecido com espécies frutíferas e florestais, que fornecerá renda e produção diversificada, melhorando a cobertura vegetal da área e a proteção ao sol

The pasta phase within density dependent hadronic models

In the present paper we investigate the onset of the pasta phase with different parametrisations of the density dependent hadronic model and compare the results with one of the usual parametrisation of the non-linear Walecka model. The influence of the scalar-isovector virtual delta meson is shown. At zero temperature two different methods are used, one based on coexistent phases and the other on the Thomas-Fermi approximation. At finite temperature only the coexistence phases method is used. npe matter with fixed proton fractions and in beta-equilibrium are studied. We compare our results with restrictions imposed on the the values of the density and pressure at the inner edge of the crust, obtained from observations of the Vela pulsar and recent isospin diffusion data from heavy-ion reactions, and with predictions from spinodal calculations.Comment: 15 pages, 11 figures and 7 table

Degradabilidade ruminal do feno de mamona, pinhão manso e maniçoba.

Este trabalho objetivou determinar a degradabilidade ruminal da matéria seca (MS), proteína bruta (PB) e fibra detergente neutro (FDN) do feno das folhas da mamona cv. Sertaneja, mamona cv. Paraguaçu, pinhão manso e feno de maniçoba. Foram utilizados três ovinos SRD com peso vivo médio de 40 kg, fistulados no rúmen. Os tempos de incubação foram 0, 6, 12, 24, 48 e 96 horas. O feno de pinhão manso apresentou teor de proteína bruta de 10,3 %, valor inferior ao das outras euforbiáceas testadas. As duas mamonas apresentaram menores valores percentuais de componentes fibrosos (27,4 e 27,6 %). Não houve diferença entre os valores das frações da MS solúveis em água ?a? das euforbiáceas estudadas. O feno de maniçoba apresentou para a fração ?b? o valor de 55,3%, menor quando comparado às outras plantas. O feno de pinhão manso apresentou menor coeficiente ?c? da MS dentre os fenos testados (1,4 %/h) e a mamona sertaneja o maior valor (2,2 %/h). O feno do pinhão manso e o de maniçoba apresentaram coeficientes ?c? da PB e da FDN de 3,7 e 2,2 %/h respectivamente sendo os maiores comparados às outras euforbiáceas. O feno de maniçoba apresentou DP e DE da MS inferiores aos outros alimentos. As mamonas obtiveram DP e DE da PB semelhantes e superiores aos outros fenos. Já o pinhão manso apresentou DP e DE da FDN superiores aos outros alimentos. As composições bromatológicas bem como as características de cinética de degradação dos fenos das mamonas e pinhão manso as qualificam como opção forrageira a serem melhores estudadas