The origins of materials and practices – A review

UID/QUI/50006/2013. POCI-01-0145-FEDER-007265This paper is the fifth of a series and focuses on tracing the history of the use of gypsum based products as well as of the use of ground layers, centred on a review of published analytical evidence. The purpose is to contribute for the understanding of these long traditions which led to the choice of specific materials and practices used for producing gilding grounds in southern Europe. In fact, several practices and the raw material gypsum used in gilded surfaces do have an extremely long tradition, which can be traced back to the Pre-Pottery Neolithic B. The systematic use of these materials, especially the use of ground layers for decoration and other purposes, suggests not only an intention but also, somehow, the notion of a complex concept, the concept of a composite material, even at these very early periods, from which gilding origins. In addition, the particular case of Portugal shows that aspects such as religious, political, and sociocultural influences played a central role in the choice of gypsum as the raw material, which was curiously used exclusively for gilding.publishersversionpublishe

And we shall spend the first million together : narrative as basis for a case study research process

This work depicts the methodological rationale of a research about open innovation in SMEs. The general objective of the study is to understand how identity strategies determine the adoption and success of interactions among innovation practitioners, enabling open innovation to succeed among small firms and becoming an essential part of their business and informational strategy. The article aims at describing the choice of a specific qualitative approach, case study, linked to actor-network-theory epistemological background, as the study involves a series of innovation actors, and how narrative inquiry is chosen to be the most adequate approach to retrieve the information a case study needs to set its methodological pillars.FEDER Programa Operacional Fatores de Competitividade – COMPETEFCT – Fundação para a Ciência e Tecnologia: FCOMP-01-0124-FEDER-02267

Rvolta, a case for open innovation : how can a SME be innovative in a competitive industrial environment

Rvolta has been working in waste management industry for 16 years now. This SME (Small and Medium Enterprise) from Portugal is taken as a focus point for the case study addressing a network of partners working in various activities which became related, so as to disclose the underlying innovative spirit, strategy and partnership structure. Objectives of the present chapter are to portray and analyze a SME success case in open innovation (through various innovation practices), and clarify how knowledge creation and collaboration amongst different players in a network takes place. An exemplary collaboration episode is told. Framing issues are addressed so as to understand how they affect open innovation in SMEs. The study finds interactions, networking, and partnership connections, are important issues and indeed make a difference, thus enabling SMEs to innovate. This case evolved from an exploratory phase of an Information Systems PhD qualitative research, addressing open and crowdsourcing innovation.(undefined

O legado de Ferreira Marques na voz dos psicólogos

Partindo de uma breve reflexão sobre o contributo de Ferreira Marques para o desenvolvimento da psicologia vocacional em Portugal, é objetivo do presente artigo lembrar o legado do Professor Ferreira Marques através da memória de antigos alunos, atualmente a exercer atividades de intervenção psicológica em diversos contextos profissionais. Participaram neste ensaio onze antigos alunos que responderam a um questionário sobre os contributos de Ferreira Marques para a psicologia em Portugal e para o seu desenvolvimento profissional. Das respostas dos participantes foi possível identificar dois grandes temas da dimensão profissional da carreira de Ferreira Marques: a afirmação do modelo ciclo de vida/espaço de vida na realidade portuguesa e a afirmação da psicologia, em geral, e da psicologia vocacional, em particular. Das características pessoais de Ferreira Marques referidas pelos participantes destacam-se o rigor, o método, a atenção ao detalhe e a persistência. Características estas que estão na base de uma carreira profissional que contribuiu de forma marcante para a afirmação da psicologia em Portugal

O princípio nemo tenetur se ipsum accusare : a recusa do arguido em prestar autógrafos

Dissertação apresentada à Faculdade de Direito da Universidade de Coimbra no âmbito do 2º Ciclo de Estudos em Direito conducente ao grau de Mestre, na área de especialização em Ciências Jurídico-Forense

S&P 500 Options Returns: Bull and Bear Markets

Tese de mestrado, Matemática Financeira, 2021, Universidade de Lisboa, Faculdade de CiênciasAn option consists in a financial contract between two parties, the buyer and the seller. These types of contracts provide its holder the right (but not the obligation) to buy or to sell a certain pre-established quantity of the underlying, under a pre-established price condition within a determined period, as described in Black and Scholes [2]. As for the seller of the option, if the buyer decides to exercise the contract, he must deliver or acquire the underlying asset at the pre-established conditions of the contract. Back in 2001, Coval and Shumway [5] provided the first ever published paper focused on the returns of option contracts. But does their methodology/propositions still hold with a more up-to-date database? Do option returns react differently if the market is growing or crashing? In this thesis we implement the method of calculation for options returns from Coval and Shumway [5] on the S&P500 index options over a 15-year period, from January 2004 to April 2019. During this period we identify three Bull cycles and three Bear cycles on the financial markets by analysing the evolution of the S&P500 prices. We find similar results as the ones found in Coval and Shumway [5] and analyse the daily option returns under the index. We also make a more detailed analysis in what are the main discrepancies between the returns of Call and Put options in Bull vs Bear cycles

Quality criteria for interpretive research in information systems: a reflection on Klein and Myers' set of principles

In the last two decades, interpretive research has become more established and more popular in information systems (IS) field (Walsham 2006), (Walsham 1995a). Publications with detailed information and practical guidelines for conducting this type of studies have contributed to grow confidence in interpretive methods, as for example (Walsham 1995b), (Walsham 2006), (Myers 1997), and (Klein & Myers 1999). The work of Klein and Myers (1999) consists of a set of principles for conducting and evaluating interpretive research, which provide fair and appropriate criteria for judging the validity and reliability of such studies. In this article we focus on understanding how this set of principles has informed research articles published in the highest-ranked IS journals (according to Association of Information Systems): Management Information Systems Quarterly and Information Systems Research. We question if these principles have been translated into common practices when conducting interpretive research in the field of information systems and whether authors incorporate them explicitly when they communicate the results of their research. Articles published in these two journals are recognized as finest exemplars of rigorously conducted research and thus represent a relevant sample for this exploratory study. This work can be extended in the future to include more journals. This research is empirical and the analysis is done at the level of articles published in those two journals. We browsed the entire collection of articles published in these journals between 1999 and 2009 and selected research papers reporting field studies of interpretive nature. Selected articles were read, with particular focus in the methodology section, and explicit or implicit evidence of quality criteria that informed the research was collected. Direct or indirect reference to Klein and Myers' set of principles was highlighted. We summarize and compare our findings in a comprehensive table, and note that, apparently, the principle of hermeneu