Energy bands and Landau levels of ultracold fermions in the bilayer honeycomb optical lattice

We investigate the spectrum and eigenstates of ultracold fermionic atoms in the bilayer honeycomb optical lattice. In the low energy approximation, the dispersion relation has parabolic form and the quasiparticles are chiral. In the presence of the effective magnetic field, which is created for the system with optical means, the energy spectrum shows an unconventional Landau level structure. Furthermore, the experimental detection of the spectrum is proposed with the Bragg scattering techniques.Comment: To appear in Journal of Modern Optic

The localization of multiple cathepsin mRNAs in the seminiferous epithelium by in situ hybridization is consistent with their role in germ cell (GC) migration

Abstract no. 707published_or_final_versio

Actomyosin polarisation through PLC-PKC triggers symmetry breaking of the mouse embryo

Establishment of cell polarity in the mammalian embryo is fundamental for the first cell fate decision that sets aside progenitor cells for both the new organism and the placenta. Yet the sequence of events and molecular mechanism that trigger this process remain unknown. Here, we show that de novo polarisation of the mouse embryo occurs in two distinct phases at the 8-cell stage. In the first phase, an apical actomyosin network is formed. This is a pre-requisite for the second phase, in which the Par complex localises to the apical domain, excluding actomyosin and forming a mature apical cap. Using a variety of approaches, we also show that phospholipase C-mediated PIP2 hydrolysis is necessary and sufficient to trigger the polarisation of actomyosin through the Rho-mediated recruitment of myosin II to the apical cortex. Together, these results reveal the molecular framework that triggers de novo polarisation of the mouse embryo.This work was supported by the Wellcome Trust. M.Z.G. is a Wellcome Trust Senior Research Fellow, M.Z. is supported by the Cambridge Trust, and M.N.S. is an EMBO Postdoctoral Fellow

Deep level defects in a nitrogen-implanted ZnO homogeneous p-n junction

Nitrogen ions were implanted into undoped melt grown ZnO single crystals. A light-emitting p-n junction was subsequently formed by postimplantation annealing in air. Deep level transient spectroscopy was used to investigate deep level defects induced by N+ implantation and the effect of air annealing. The N+ implantation enhanced the electron trap at E C -(0.31±0.01) eV (E3) and introduced another one at E C -(0.95±0.02) eV (D1), which were removed after annealing at 900 and 750 °C, respectively. Another trap D2 (Ea =0.17±0.01 eV) was formed after the 750 °C annealing and persisted at 1200 °C. © 2008 American Institute of Physics.published_or_final_versio

Energy-aware integrated process planning and scheduling for job shops

Process planning that is based on environmental consciousness and energy-efficient scheduling currently plays a critical role in sustainable manufacturing processes. Despite their interrelationship, these two topics have often been considered to be independent of each other. It therefore would be beneficial to integrate process planning and scheduling for an integrated energy-efficient optimisation of product design and manufacturing in a sustainable manufacturing system. This article proposes an energy-aware mathematical model for job shops that integrates process planning and scheduling. First, a mixed integrated programming model with performance indicators such as energy consumption and scheduling makespan is established to describe a multi-objective optimisation problem. Because the problem is strongly non-deterministic polynomial-time hard (NP-hard), a modified genetic algorithm is adopted to explore the optimal solution (Pareto solution) between energy consumption and makespan. Finally, case studies of energy-aware integrated process planning and scheduling are performed, and the proposed algorithm is compared with other methods. The approach is shown to generate interesting results and can be used to improve the energy efficiency of sustainable manufacturing processes at the process planning and scheduling levels

Temperature and safety profiles of needle-warming techniques in acupuncture and moxibustion

Author name used in this publication: K. W. E. Cheng2011-2012 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe

EFEITOS DA INTOXICAÇÃO AGUDA COM ETANOL SOBRE A EXSUDAÇÃO DE NEUTRÓFILOS PARA A CAVIDADE PERITOENAL DE EM CAMUNDONGOS INOCULADOS COM Staphilococcus aureus.

Introdução. Há demonstrações que uma intoxicação aguda pelo etanol tem efeitos antiinflamatórios, com redução da exsudação de neutrófilos e com aumento da susceptibilidade a bactérias, especialmente Streptococcus pneumoniae. No entanto não se conhece o tempo durante o qual persistem os efeitos inibidores da exsudação celular e da redução da atividade microbicida de leucócitos, após a intoxicação etílica aguda. Objetivos. Avaliar o tempo após uma intoxicação etílica aguda no qual persistem os efeitos inibidores da exsudação de neutrófilos e a redução da capacidade microbicida do exsudato inflamatório em um modelo de peritonite induzida por Staphylococcus aureus. Métodos. Camundongos C57BL/6 receberam, por gavagem, uma dose de 7mg de etanol/g peso corporal em solução a 40%. Uma, 12,24, 48 e 72 horas após, receberam uma inoculação intraperitoneal de Staphylococcus aureus (0,5 ml contendo 6 a 9x108 UFC/mL; cepa ATCC 25923). Seis horas depois, os animais eram eutanasiados e a cavidade peritoneal lavada com PBS/EDTA 0,01M; uma alíquota era utilizada para contagem do número de UFC e a outra para contagem global e específica das células do exsudato utilizando câmara de Neubauer e citocentrífuga para confecção de esfregaços, corados por corante hematológico rápido (Dipquick). A contagem de UFC foi feita pelo método de diluição seriada com semeadura em placas de ágar Müller-Hinton. Resultados. Todos os animais que receberam etanol apresentaram sinais de embriaguês, que chegou a um estado de letargia profunda do qual todos os animais se recuperavam em, no máximo, 45 minutos. A dose de etanol utilizada induziu involução do timo, evidente 24 horas após a alcoolização, mas com recuperação após 120 horas. Nos animais alcoolizados que receberam o inóculo do estafilococo houve redução significativa da exsudação celular, devido a redução da exsudação de neutrófilos, até 24 horas após a ingestão do etanol. A análise dos esfregaços mostrava maior quantidade de bactérias fora das células no grupo etanol e o número de UFC foi maior no período avaliado, mas a diferença não foi estatisticamente significativa. Conclusão. Confirma-se os efeitos antiinflamatórios da intoxicação etílica aguda, com redução significativa no exsudato de leucócitos, até 24 horas após a exposição ao etanol; essa redução decorre especialmente da redução da exsudação de neutrófilos, já que o número de mononucleares exsudados no período avaliado foi semelhante nos dois grupos experimentais. O poder microbicida da cavidade peritoneal frente aos estafilococos foi menor no grupo etanol embora sem significância estatística, possivelmente porque os macrófagos residentes foram menos afetados pelos efeitos do etanol. Palavras-chaves: Alcoolismo agudo, neutrófilos, inflamação

Influence of charge trapping on electroluminescence from Si-nanocrystal light emitting structure

We report a study on the influence of charge trapping on electroluminescence (EL) from Si nanocrystal (nc-Si) distributed throughout a 30 nm Si O2 thin film synthesized by Si+ implantation into an oxide film thermally grown on a p -type Si substrate. The electron and hole trapping in the nc-Si located near the indium tin oxide gate and the Si substrate, respectively, cause a reduction in the EL intensity. The reduced EL intensity can be recovered after the trapped charges are released. A partial recovery can be easily achieved by the application of a positive gate voltage or thermal annealing at hot temperatures (e.g., 120 °C) for a short duration. The present study highlights the impact of charging in the nc-Si on the light emission efficiency and its stability of nc-Si light-emitting devices. © 2007 American Institute of Physics.published_or_final_versio

Zika Virus Infection in Dexamethasone-immunosuppressed Mice Demonstrating Disseminated Infection with Multi-organ Involvement Including Orchitis Effectively Treated by Recombinant Type I Interferons

published_or_final_versio

Monitoring and analysis of internal displacements of a slope and relationship with rainfall infiltration

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