Testing strong gravity with gravitational waves and Love numbers

The LIGO observation of GW150914 has inaugurated the gravitational-wave astronomy era and the possibility of testing gravity in extreme regimes. While distorted black holes are the most convincing sources of gravitational waves, similar signals might be produced also by other compact objects. In particular, we discuss what the gravitational-wave ringdown could tell us about the nature of the emitting object, and how measurements of the tidal Love numbers could help us in understanding the internal structure of compact dark objects

A Ilha das Flores : a génese e evolução da costa ocidental da ilha das Flores.

IV Expedição Científica do Departamento de Biologia – Flores 19890 presente trabalho insere-se na expedição cientifica organizada pelo Departamento de Biologia da Universidade dos Açores, à Ilha das Flores e que decorreu de 4 a 11 de Julho de 1989. Durante o curto espaço de tempo que permanecemos, podemos observar, e debruçarmo-nos sobre a geografia física da Ilha e evolução da costa Ocidental, após os desabamentos ocorridos na Ponta da Fajã, a 18/12/87, tendo ficado soterrada uma Ermida e destruído algumas casas. Percorremos caminhos pedonais, desde a Ponta da Fajã até Ponta Delgada, a uma altitude média dos 450m, observando uma vegetação intensa e luxuriante. Apesar de nos encontrarmos em pleno verão foram inúmeras as linhas de água (perenes) que atravessamos, e quase sempre o caminho apresentava-se enlameado, tal a abundância de água nesta vertente

Public art and social media: Street art tourism, sociocultural agency and cultural production in contemporary Lisbon

This essay engages with Guias do Mocho [Mocho’s Tourist Guides], a bottom-up cultural tourism initiative emerging in Quinta do Mocho, a ‘peripheral’ neighbourhood of Lisbon, as a way of problematizing the relationship between public and street art and social media aesthetics. Scholarship on digital creative industries and street art tourism tends to emphasize the complicities of this kind of cultural experience with neoliberal understandings of the urban space. By examining an example of bottom-up, localized guided tours that operates through social media in the context of peripheral areas of Lisbon, we argue that public art and social media should be seen as part of a more complicated correlation, one in which the affects and effects of creative, site-specific projects are actively developed and expanded in unforeseen ways. Our research demonstrates that public art and social media are mutually developing a renewed economy of attention and system of valorization. The critical examination of both elements is compulsory when measuring the impact of art-driven processes of community development.info:eu-repo/semantics/publishedVersio

A combination of friedel-crafts and lawesson reactions to 5-substituted-2,2´-bithiophenes

Gama-Keto esters (2) derivatives of thiophene were obtained from hemi-succinic esters and transformed to the corresponding amides (4). Lawesson´s treatment of 2 and 4 gave the corresponding bithiophenes (5) with alkoxy or amino substituents.Fundação para a Ci~Encia e Tecnologia. ICCTI/French Embassy - Technical and Scientific~Cooperation Programme

Formylation, dicyanovinylation and tricyanovinylation on 5-alkoxy- and 5-amino-substituted-2,2´-bithiophenes

Several donor-acceptor-substituted bithiophenes were synthesized by functionalization of the corresponding 5-alkoxy- or 5-aminobithiophenes 1 by different methods: Vilsmeier formylation, metalation followed by reaction with DMF, direct tricyanovinylation reaction using TCNE or Knoevenagel condensation starting from the corresponding 5-formyl- derivatives of 1.ICCTI/French Embassy (Technical and Scientific Cooperation Programme). Fundação para a Ciência e Tecnologia - POCTI/QUI/37816/2001, FMRH / BSAB / 134/99

Universities’ Entrepreneurship Education and Regional Development: a Stakeholders’ Approach

It is assumed that entrepreneurship education encourage the growth of new businesses, exploiting the entrepreneurial spirit within higher education sector. Additionally, entrepreneurship higher education is supposed to play a relevant role in the development of enterprising citizens and in the development regions through an ongoing process of knowledge creation and delivery. In this research we will explore what roles are attributed to entrepreneurship education in the literature with regard to regional development as well as the influence and relationship of the main intervening stakeholders. The aim is to present a conceptual model which integrate the contributions of both strands of literature and, at the same time, highlight the interplay between the several stakeholders involved in HEI’s entrepreneurship education and regional development.Entrepreneurship education, university, regional development, stakeholders

On a theorem due to Murray

In this paper, we introduce the notions of $\alpha$-quasicomplemented and totally $\alpha$-quasicomplemented subspaces and we established some results under these contexts. We show, for example, that if $X$ is a separable or reflexive Banach space and $Y$ is a closed infinite codimensional subspace of $X$, then $Y$ is totally$\mathit{\ }\alpha$-quasicomplemented if, and only if, $\alpha<\aleph_{0}$ $\left( \text{this is an analogue of the theorem of Murray-Mackey and Lindenstrauss}\right)$. We also show that if $H$ is a Hilbert space and $Y,W\subset H$ are closed subspaces of $H$ such that $W$ is orthogonal to $Y$ and $\operatorname{codim}\left( Y+W\right) =\infty$, then $Y$ has a quasicomplement $Z$ containing $W$ with $\dim Z/W=\infty$. Other results in the different contexts are also included. Such results establish a connection between the theory of quasicomplemented subspaces and $\left( \alpha,\beta\right)$-spaceability

The Black's place in the city image: Afroeuropeans and urban representations in Europe

In this session, we will investigate the visibility/invisibility and the inclusion/exclusion of African populations and people of African descent, within the physical and imaginary borders of Europeans cities with a colonial history. Focusing on both the material and immaterial aspects of the image construction, we will engage in debates concerned with the involvement of African populations and their descendants in current urban representations.info:eu-repo/semantics/publishedVersio

Donor-acceptor substituted oligothiophenes: synthesis, spectroscopic and electrochemical properties

Seven new donor/acceptor oligothiophenes 1-2 were synthesized by Stille coupling in moderate to good yields. Compounds 1-2 were completely characterized by the usual spectroscopic methods. In agreement with the electrochemical and the spectroscopic studies for this compounds the new derivatives prepared, can find application for manufacturing new materials with strong non-linear optical (NLO) properties.Fundação para a Ciência e a Tecnologia (FCT