Relation between organizational commitment and professional commitment: an exploratory study conducted with teachers

The existence of several kinds of commitments in the workplace is well known. However, there are few studies that relate these different commitments or those established by deterministic models. This study explored the relationship between organizational and professional commitment in public higher education professors according to the multidimensional perspective of Meyer and Allen (1991), based on a convenience sample of 219 teachers. The proposed models were estimated through structural equation modeling methodology. Model 1 specified a relationship of direct influence of Professional Commitment on Organizational Commitment and Model 2 established the opposite relationship of direct influence of organizational commitment on professional commitment. Both models presented a good fit to the data without statistically significant differences between them. Nevertheless, the explanatory power of Model 1 was superior to Model 2, due to the fact that it includes a larger number of determinant relationships that are statistically significant. Theoretical and practical implications were discussed and new directions for future research were identified.info:eu-repo/semantics/publishedVersio

High efficiency coupling of photon pairs in practice

Multi-photon and quantum communication experiments such as loophole-free Bell tests and device independent quantum key distribution require entangled photon sources which display high coupling efficiency. In this paper we put forward a simple quantum theoretical model which allows the experimenter to design a source with high pair coupling efficiency. In particular we apply this approach to a situation where high coupling has not been previously obtained: we demonstrate a symmetric coupling efficiency of more than 80% in a highly frequency non-degenerate configuration. Furthermore, we demonstrate this technique in a broad range of configurations, i.e. in continuous wave and pulsed pump regimes, and for different nonlinear crystals

Tuned liquid dampers simulation for earthquake response control of buildings

This paper is focused on the study of an earthquake protection system, the Tuned Liquid Damper (TLD), which can, if adequately designed, reduce earthquake demands on buildings. This positive effect is accomplished taking into account the oscillation of the free surface of a fluid inside a tank (sloshing). The behaviour of an isolated Tuned Liquid Damper, subjected to a sinusoidal excitation at its base, with different displacement amplitudes, was studied by finite element analysis. The efficiency of the TLD in improving the seismic response of an existing building, representative of modern architecture buildings in southern European countries was also evaluated based on linear dynamic analyses

Análise de associação genômica ampla baseada em conjunto de genes: implementação em R.

O objetivo deste trabalho é a criação de um pacote R (R CORE TEAM, 2014) que implemente quatro diferentes métodos de GSEA no contexto de GWAS, considerando adaptações para aplicação em espécies animais de interesse para a agricultura

Arte Nova em Aveiro e sua relação com o Adobe

O movimento Art Nouveau surgiu no final do século XIX com o desenvolvimento da era industrial e traduz-se pela representação do movimento com recurso a elementos naturais para ornamentação. Foi um fenómeno súbito e de curta duração que se iniciou em Bruxelas e se propagou para outros países onde adquiriu um carácter distinto e particular adaptando-se às condições estéticas de cada país. Em Portugal, este estilo surgiu relativamente tarde, entre 1907 e 1909, numa altura em que praticamente tinha terminado nos restantes países da Europa, pela mão do Arquitecto Silva Rocha, natural de Aveiro. Hoje em dia, Aveiro é considerada a capital da Arte Nova em Portugal, com vários exemplares arquitectónicos magníficos deste estilo. A maior parte destas edificações apresenta um elevado estado de degradação, tendo até por vezes sérios problemas estruturais. No entanto, recentemente tem havido um esforço de preservação e reabilitação deste património com intervenções importantes já realizadas. Devido às técnicas de construção tradicionalmente utilizadas na zona e no período em que a Arte Nova surgiu, a maioria dos edifícios deste estilo da região de Aveiro foram construídos em alvenaria de blocos de adobe. Este tipo de construção exige cuidados particulares a ter em conta na sua manutenção e preservação. A reabilitação de edifícios deste tipo necessita de uma atenção especial relativamente aos aspectos relacionados com os materiais e soluções tradicionais. Este artigo debruça-se sobre a arquitectura de estilo Arte Nova que constitui um vasto património histórico na região de Aveiro, apresentando alguns dos exemplos existentes e com uma descrição sumária das suas características. As patologias e problemas estruturais comuns destas edificações serão enumerados, exemplificando com o caso de reabilitação já efectuada de um dos exemplares mais emblemáticos de Aveiro: a Casa Major Pessoa. Pretende-se assim contribuir para a preservação do legado arquitectónico histórico existente na região de Aveiro, bem como divulgar possíveis técnicas e soluções de reabilitação e manutenção de estruturas de adobe

Ulcerative colitis: let's talk about extent

Ulcerative colitis (UC) is a chronic inflammatory disease in which clinical course varies substantially between patients. The extent of the disease is usually pointed out as one of the factors responsible for this variation. With this study, we pretended to evaluate the differences in natural history and pharmacological therapy prescription between left-sided and extended UC

Energy governance in Portugal

Portugal is in the middle of a major transformation of its energy supply, which has been shaped by internal resource constraints, growing environmental concerns, and the dynamics of European integration. Portugal’s past choices – the investment in hydropower and the refusal of nuclear energy – and the lack of an endowment of resources have constrained the Portuguese energy policy. With the accession to the European Union in 1986, environmental concerns moved up the Portuguese policy agenda. The EU’s push for a common electricity market influenced a set of policies oriented toward the liberalization of the energy market, which was centralized, monopolistic, and public owned. The investment in renewable energy gained momentum in the 2000s, led by the Portuguese government and EDP, the (then) publicly owned energy company, supported by a public discourse on climate change and energy policy imbued with economic rationality. The financial crisis that hit Portugal in 2010 led to a temporary stall in the promotion of the use of energy from renewable energy sources (RES), but new market-based support schemes, such as photovoltaic solar auctions, have fostered the recent new investment in renewables.info:eu-repo/semantics/acceptedVersio

Coccolithophore fluxes in the open tropical North Atlantic: influence of thermocline depth, Amazon water, and Saharan dust

Coccolithophores are calcifying phytoplankton and major contributors to both the organic and inorganic oceanic carbon pumps. Their export fluxes, species composition, and seasonal patterns were determined in two sediment trap moorings (M4 at 12 degrees N, 49 degrees W and M2 at 14 degrees N, 37 degrees W) collecting settling particles synchronously from October 2012 to November 2013 at 1200 m of water depth in the open equatorial North Atlantic. The two trap locations showed a similar seasonal pattern in total coccolith export fluxes and a predominantly tropical coccolithophore settling assemblage. Species fluxes were dominated throughout the year by lower photic zone (LPZ) taxa (Florisphaera profunda, Gladiolithus flabellatus) but also included upper photic zone (UPZ) taxa (Umbellosphaera spp., Rhabdosphaera spp., Umbilicosphaera spp., Helicosphaera spp.). The LPZ flora was most abundant during fall 2012, whereas the UPZ flora was more important during summer. In spite of these similarities, the western part of the study area produced persistently higher fluxes, averaging 241 x 10(7) +/- 76 x 10(7) coccoliths m(-2) d(-1) at station M4 compared to only 66 x 10(7) +/- 31 x 10(7) coccoliths m(-2) d(-1) at station M2. Higher fluxes at M4 were mainly produced by the LPZ species, favoured by the westward deepening of the thermocline and nutricline. Still, most UPZ species also contributed to higher fluxes, reflecting enhanced productivity in the western equatorial North Atlantic. Such was the case of two marked flux peaks of the more opportunistic species Gephyrocapsa muellerae and Emiliania huxleyi in January and April 2013 at M4, indicating a fast response to the nutrient enrichment of the UPZ, probably by wind-forced mixing. Later, increased fluxes of G. oceanica and E. huxleyi in October-November 2013 coincided with the occurrence of Amazon-River-affected surface waters. Since the spring and fall events of 2013 were also accompanied by two dust flux peaks, we propose a scenario in which atmospheric dust also provided fertilizing nutrients to this area. Enhanced surface buoyancy associated with the river plume indicates that the Amazon acted not only as a nutrient source, but also as a surface density retainer for nutrients supplied from the atmosphere. Nevertheless, lower total coccolith fluxes during these events compared to the maxima recorded in November 2012 and July 2013 indicate that transient productivity by opportunistic species was less important than "background" tropical productivity in the equatorial North Atlantic. This study illustrates how two apparently similar sites in the tropical open ocean actually differ greatly in ecological and oceanographic terms. The results presented here provide valuable insights into the processes governing the ecological dynamics and the downward export of coccolithophores in the tropical North Atlantic.Netherlands Organization for Scientific Research (NWO) [822.01.008]; European Research Council (ERC) [311152]; University of Bremen; European Union [600411]info:eu-repo/semantics/publishedVersio

Past, present, and future of pro-environmental behavior in tourism and hospitality: a text-mining approach

Scholars have been interested in examining what drives pro-environmental behavior. However, only a few scientific studies have been devoted to analyzing and understanding the pro-environmental behavior of those that are on vacation. Therefore, the current paper contributes to the existing literature by employing a text-mining approach to conduct a full-text analysis of 210 articles and (1) describes pro-environmental conceptualization, (2) presents the important topics and studies that have emerged from the literature, and (3) suggests directions for future research. The eight core topics that were uncovered contributed to discussion of the content of publications, related theories, core constructs, methodologies, main authors, and journals. The paper shows that the literature on pro-environmental behavior uses more quantitative than qualitative approaches and uses structural equations or regression analysis to explore the data. The findings also show that researchers tend to employ well-known theories arising from psychology, sociology, and biology.info:eu-repo/semantics/acceptedVersio