ENIDH – GP/GTL - Gestão Portuária/Gestão de Transportes e Logística
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- O mercado do transporte marítimo de carga contentorizadaPublication . Gonçalves, F. Cruz
- Marine pollution in the nautical seaports in Croatia by the effluent of touristsPublication . Andres, M. A.; E., Madariaga; Delgado, O.; Martinez, J. E.The objective of this paper is to define the strategy to be followed to improve and develop nautical tourism in Croatia, taking into account all the factors involved in this activity, with the main importance of protecting the environment and establishing the lines to be followed to respond to the entire demand and for economic development.Nautical tourism seaports make an open, dynamic and complex system which has been rapidly evolving, this is the reason for the development of this system requires continual monitoring and research to preserve their environment and ecosystems to have a future tourism sector. In order to have environmentally sustainable nautical tourism, investments must be made in infrastructures and in controls. The growth must respond to the demands, respecting in any case, the measures of management and prevention of fight against the pollution.
- Government policies and portuguese port governance in the period from 2005 to 2015Publication . Caldeirinha, Victor; Felício, J. A.; Cunha, S.This research focuses on the effect of Portuguese government policies in port management, port strategy and port performance in the period from 2005 to 2015. With the structural equation modeling, we analyzed a sample of 172 observations. Government policies influence the port sector differently. The policies adopted during the period under study produced different effects, especially the national planning policies for investments as well as the central control policy, implemented to make operations and port labor more productive. The main contribution of this paper resides in understanding that it is essential to ensure sustainability conditions for the national port system in an increasingly globalized market where the trend is to be less dependent on the government policies.
- Cruises tourism in Lisbon: the impact on the portuguese economy.Publication . Mendes, Zorro; Mendes, Dulce; Delgado, Olga; Fabrizio Serra editoreThis paper aims to demonstrate the broad impact of demand for goods and services on the Portuguese economy, made by cruise tourists who stop over in the Port of Lisbon. The paper applies the input-output matrix methodology in order to measure both direct and indirect effects on the Portuguese economy. Based on the most updated data available (2016), it is shown that direct demand exerted by cruise tourists in Lisbon, in the total amount of EUR 17,799,011, limited to certain activity sectors, spreads across all sectors of the national economy, by inducing to a dynamic in total national production, reaching EUR 29,329,662 (which can be quantified for each of the 62 activity sectors considered in the input-output matrix).
- The nexus between port governance and performancePublication . Caldeirinha, Victor; Felício, J. A.; Cunha, S.; Luz, L. M.The diversity of port governance models in the world, sometimes even within the same country, has aroused the interest of researchers. This study is based on contingency theory to support the port governance model. The purpose is to understand the port governance model and the relation with port performance. There are three objectives: to analyze the port governance mechanisms; to analyze the port performance factors; and to understand the influence of the governance model mechanisms on port performance. A factorial analysis was used to determine the main components, and the methodology of the structural equation model was used to analyze a survey sample of 105 valid responses from specialists and managers of port user’s companies that operate in the main Portuguese ports. This study demonstrates that port governancemodel influences directly the port performance. The main contribution of this paper to the literature is providing a set of factors that public managers may decide when changing the characteristics of the port governance models to ensure their performance. It was also observed the approximation of the port expert vision of port governance with models described in literature.
- Ambidextrous capacity in small and medium-sized enterprises.Publication . Felício, J. Augusto; Caldeirinha, Vítor; Dutra, AdemarThis study examines the ambidextrous capacity—the ability to respond simultaneously to both disruptive and incremental innovation processes—of small and medium-sized enterprises (SMEs) in Portugal. The purpose is to understand the organizational ambidexterity of SMEs and its relationship to organizational performance and innovation capacity. The objectives are to evaluate the characteristics that identify ambidextrous organizations and analyze the effect of organizational ambidexterity on performance, supported by the contingency-based approach, organizational theory, behavioral theory of the firm, and organizational learning theory. After factor analysis is performed, a structural equations model is used to analyze a sample of 202 valid responses. The analysis shows that, for SMEs, disruptive innovation factors relate mainly to innovation capacity and incremental innovation factors relate to organizational performance. The confirmation of organizational ambidexterity in SMEs and the increased recognition of the importance of disruptive innovation are relevant contributions to the literature.
- Port Governance: An integrated stakeholder perspective on sustainable port-city development.Publication . Felício, J. Augusto; Caldeirinha, VítorEste estudo analisa o contributo dos stakeholder para o desenvolvimento sustentável do porto e do porto-cidade, baseado nos modelos de governação portuária. Suportou-se na stakeholder theory. Para o tratamento da amostra constituída por 141 respondentes ibéricos válidos recorreu-se à metodologia SEM. Verificou-se que há múltiplos grupos de stakeholders que constituem o modelo de governação portuária com influência no desenvolvimento sustentável do porto e no desenvolvimento sustentável da cidade portuária e que esses grupos se diferenciam. O principal contributo reside em compreender melhor a existência de diferentes grupos de stakeholders associados ao desenvolvimento sustentável do porto e do porto-cidade.
- Sustainable tourism financial feasibility: a case study in Timor-Leste.Publication . Ferreira de Matos, AldaRecent research points out the importance of diaspora in the tourism sector and the shift happening in the tourism business model in insular countries. Lately, the demand for the niche of ecocultural tourism has been increasing, while the appearance of new construction techniques has powered the appearance of tourism facilities dierent from traditional hotels. An example of this phenomenon is Timor-Leste, where local authorities encourage tourism development to be on small sustainable facilities, the so-called boutique hotels. Nevertheless, the relevant literature does not address the nancial feasibility of this type of tourism facility. Following the expectations of national Timorese authorities regarding the type of facilities to be installed in their territory, a case study on a boutique facility project is presented in this paper. Using a discounted cash ow valuation model this case study's Net Income would be positive at the end of the 5th year of activity, when the break-even occurs, even considering small scale and ensuring environment protection exigencies.
- Ordinary differential equations with point interactions: An inverse problemaPublication . Dias, N.C.; C., Jorge; Prata, J.N.We study a class of linear ordinary differential equations (ODEs) with distributional coefficients. These equations are defined using an intrinsic multiplicative product of Schwartz distributions which is an extension of the Hörmander product of distributions with nonintersecting singular supports (Hörmander in The analysis of linear partial differential operators I, Springer, Berlin, 1983). We provide a regularization procedure for these ODEs and prove an existence and uniqueness theorem for their solutions. We also determine the conditions for which the solutions are regular and distributional. These results are used to study the Euler–Bernoulli beam equation with discontinuous and singular coefficients. This problem was addressed in the past using intrinsic products (under some restrictive conditions) and the Colombeau formalism (in the general case). Here we present a new intrinsic formulation that is simpler and more general. As an application, the case of a non-uniform static beam displaying structural cracks is discussed in some detail.
- What is the Wigner function closest to a given square integrable function?Publication . Ben-Benjamin, J.S.; Cohen, J.; Dias, Nuno C.; Loughlin, P.; Prata, João N.We consider an arbitrary square integrable function F on the phase-space and look for the Wigner function closest to it with respect to the L2 norm. It is well known that the minimizing solution is the Wigner function of any eigenvector associated with the largest eigenvalue of the Hilbert--Schmidt operator withWeyl symbol F. We solve the particular case of radial functions on the two-dimensional phase space exactly. For more general cases, one has to solve an infinite dimensional eigenvalue problem. To avoid this difficulty, we consider a finite dimensional approximation and estimate the errors for the eigenvalues and eigenvectors. As an application, we address the so-called Wigner approximation suggested by some of us for the propagation of a pulse in a general dispersive medium. We prove that this approximation never leads to a bona fide Wigner function. This is our prime motivation for our optimization problem. As a by-product of our results, we are able to estimate the eigenvalues and Schatten norms of certain Schatten-class operators. The techniques presented here may be potentially interesting for estimating eigenvalues of localization operators in time-frequency analysis and quantum mechanics.