Correlated versus Uncorrelated Stripe Pinning: the Roles of Nd and Zn Co-Doping

We investigate the stripe pinning produced by Nd and Zn co-dopants in cuprates via a renormalization group approach. The two dopants play fundamentally different roles in the pinning process. While Nd induces a correlated pinning potential that traps the stripes in a flat phase and suppresses fluctuations, Zn pins the stripes in a disordered manner and promotes line meandering. We obtain the zero temperature phase diagram and compare our results with neutron scattering data. A good agreement is found between theory and experiment.Comment: To appear at the proceedings of the LLD2K Conference Tsukuba, July 2000, Japan. 4 pages, 2 figure

As novas tecnologias e o turismo criativo : estudo de caso da cidade do Porto

This research work attempts to extend the existing literature on development strategies for creative tourism supply and on the use of new technology in tourism, specifically creative tourism, which cannot be found in most of the existing literature. Hence, this work proposes a strategy to develop creative tourism in the city of Porto, paying special attention to the role played by new technology. This study comprises an analysis of the current state of creative tourism in Porto and the use of technology in the current tourism strategy. A case study method for the city of Porto is undertaken and qualitative approach is conducted interpretatively. A seven-steps model is proposed for developing creative tourism in the city of Porto, in which new technology plays an important role. Networking is also considered as a continued input of this model. In this work, the supply ecosystem was analysed and potential service providers were taken into account. Future research could focus on tourist motivations to participate in creative activities. This study encourages key creative and/or cultural agents to take the opportunity to acknowledge their potential to develop a creative tourism offer and to be aware that this kind of tourism could be an opportunity to improve the sustainability of their businesses. It also draws attention of city leaders to this topic as a new way of enhancing the tourism experience and improving economic growth. It may also encourage these agents to develop new offers within the range of their activities, maximizing the potential of technology that they may already use. Furthermore, it provides knowledge about new ways in which to develop creative tourism innovation and to take advantage of the benefits that new technology may bring. The originality of this work is based on developing a new model for creative tourism in Porto, paying special attention to the implementation and integration of new technology. The model intends to be a guide to promoting a creative tourism policy for Porto, but it could also be used as a basis for other cities to foster this kind of tourism

Stripe dynamics in presence of disorder and lattice potentials

We study the influence of disorder and lattice pinning on the dynamics of a charged stripe. Starting from a phenomenological model of a discrete quantum string, we determine the phase diagram for this system. Three regimes are identified, the free phase, the flat phase pinned by the lattice, and the disorder pinned phase. In the absence of impurities, the system can be mapped onto a 1D array of Josephson junctions. The results are compared with measurements on nickelates and cuprates and a good qualitative agreement is found between our results and the experimental data.Comment: 4 pages, 2 figure

Success factors for corporate innovation: employees´ intrinsic motivation to innovate in the workplace

Employee motivation is seen as a success factor for corporate innovation. This study focused in understanding how some Portuguese companies are motivating their employees to innovate in the workplace, with a special focus on intrinsic motivation. This form of motivation reflects one’s inherent pleasure in performing a certain activity, without any external reward. The results of the study show that employees in Portugal are mostly motivated by task enjoyment and personal development, both reflecting a form of intrinsic motivation. When motivated by task enjoyment, individuals tend to invest more effort in their activities, and thus develop more innovative work behaviors

O lúpulo: da cultura ao extrato. Técnica cultural tradicional

Este trabalho consiste numa breve revisão sobre a cultura do lúpulo em Portugal, com incidência na técnica cultural tradicional. Faz-se um breve apontamento histórico sobre a cultura do lúpulo, em particular do desenvolvimento inicial da cultura em Portugal. Segue-se uma descrição sumária dos principais aspetos botânicos da planta e da sua adaptação ecológica. Na descrição da técnica cultural tentam destacar-se aspetos importantes como instalação da cultura, fertilização, poda, rega, proteção sanitária e colheita.info:eu-repo/semantics/publishedVersio

Impacto das políticas de reagrupamento familiar em Portugal

Publicação com o apoio do QREN/POP