How does creativity at work influence employee's positive affect at work?

Although determinants of creativity underlying innovative behaviour at work have been extensively studied, scant research has addressed creativity as a predictor variable. This paper proposes that creativity has a positive impact on employees’ positive affect at work. Two studies were conducted. Study 1 used multi-source data (170 employee-supervisor dyads) to analyse the association between creativity at work, rated by the immediate supervisor, and employees’ reported affect at work. Results showed that creativity at work is positively related to positive affect at work over and above employees’ optimism (dispositional trait). Study 2 replicated and extended these findings using two-wave data from 108 high-school teachers. Results evidenced that employees who were more creative at work (T1) were more likely to report having more frequent positive affect at work 3 months later (T2). The level of meaningfulness of work (T1) mediated the effects of creativity on employees’ positive affect at work. These findings provide evidence for framing creativity in the workplace as a meaningfulness-making activity that affects employees’ positive affect at work. The implications of these findings and areas for future research are discussed.info:eu-repo/semantics/acceptedVersio

Tunneling effects on impurity spectral function in coupled asymmetric quantum wires

The impurity spectral function is studied in coupled double quantum wires at finite temperatures. Simple anisotropy in the confinement direction of the wires leads to finite non-diagonal elements of the impurity spectral function matrix. These non-diagonal elements are responsible for tunneling effects and result in pronounced extra peak in the impurity spectral function up to temperatures as high as 20 K.Comment: Accepted in Phys. Rev.

Impacts of in vivo and in vitro exposures to tamoxifen: comparative effects on human cells and marine organisms

Tamoxifen (TAM) is a first generation-SERM administered for hormone receptor-positive (HER+) breast cancer in both pre- and post-menopausal patients and may undergo metabolic activation in organisms that share similar receptors and thus face comparable mechanisms of response. The present study aimed to assess whether environmental trace concentrations of TAM are bioavailable to the filter feeder M. galloprovincialis (100 ng L-1) and to the deposit feeder N. diversicolor (0.5, 10, 25 and 100 ng L-1) after 14 days of exposure. Behavioural impairment (burrowing kinetic), neurotoxicity (AChE activity), endocrine disruption by alkali-labile phosphate (ALP) content, oxidative stress (SOD, CAT, GPXs activities), biotransformation (GST activity), oxidative damage (LPO) and genotoxicity (DNA damage) were assessed. Moreover, this study also pertained to compare TAM cytotoxicity effects to mussels and targeted human (i.e. immortalized retinal pigment epithelium - RPE; and human transformed endothelial cells - HeLa) cell lines, in a range of concentrations from 0.5 ng L-1 to 50 μg L-1. In polychaetes N. diversicolor, TAM exerted remarkable oxidative stress and damage at the lowest concentration (0.5 ng L-1), whereas significant genotoxicity was reported at the highest exposure level (100 ng L-1). In mussels M. galloprovincialis, 100 ng L-1 TAM caused endocrine disruption in males, neurotoxicity, and an induction in GST activity and LPO byproducts in gills, corroborating in genotoxicity over the exposure days. Although cytotoxicity assays conducted with mussel haemocytes following in vivo exposure was not effective, in vitro exposure showed to be a feasible alternative, with comparable sensitivity to human cell line (HeLa).info:eu-repo/semantics/publishedVersio

Topological defects in lattice models and affine Temperley-Lieb algebra

This paper is the first in a series where we attempt to define defects in critical lattice models that give rise to conformal field theory topological defects in the continuum limit. We focus mostly on models based on the Temperley-Lieb algebra, with future applications to restricted solid-on-solid (also called anyonic chains) models, as well as non-unitary models like percolation or self-avoiding walks. Our approach is essentially algebraic and focusses on the defects from two points of view: the "crossed channel" where the defect is seen as an operator acting on the Hilbert space of the models, and the "direct channel" where it corresponds to a modification of the basic Hamiltonian with some sort of impurity. Algebraic characterizations and constructions are proposed in both points of view. In the crossed channel, this leads us to new results about the center of the affine Temperley-Lieb algebra; in particular we find there a special subalgebra with non-negative integer structure constants that are interpreted as fusion rules of defects. In the direct channel, meanwhile, this leads to the introduction of fusion products and fusion quotients, with interesting mathematical properties that allow to describe representations content of the lattice model with a defect, and to describe its spectrum.Comment: 41

A review of the blood coagulation system of fish.

Uma revisão do sistema de coagulação sanguínea de peixes. Hemostasia é uma função de grande importância para responder a danos e desordens da coagulação sanguínea. Assim, é fundamental para prevenir hemorragia e perda de sangue após um dano vascular, pois o corpo necessita de um mecanismo de coagulação eficiente. Em peixes, apesar de existirem diversos estudos sobre fatores intrínsecos e extrínsecos, algumas questões significantes sobre a regulação do sistema de coagulação permanecem em aberto, uma vez que estes dados estão dispersos na literatura. Esta revisão compara e discute os diversos aspectos dos mecanismos de coagulação em peixes teleósteos, incluindo algumas substâncias relacionadas a este processo, fatores envolvidos na hemostasia, as implicações dos trombócitos no sistema intrínseco da coagulação e diferenças no tempo de coagulação sanguínea