Search results for " Opera"
showing 10 items of 3606 documents
Fuzzy Multi-Criteria Decision Making: An entropy-based approach to assess tourism sustainability
2019
In this article, we propose a method for ranking tourist destinations and evaluating their performances under a sustainability perspective: a fuzzy multiple criteria decision-making method is applied for determining sustainability performance values and ranking destinations accordingly. We select a set of sustainability evaluation criteria and use a fuzzy analytic hierarchy process to weight the selected criteria. We also optimize each evaluator’s membership function support by means of a fuzzy entropy maximization criteria. A case study is illustrated and results are compared with two data envelopment analysis–based models. The simplicity of the proposed approach along with the easy reada…
A fuzzy evaluation of tourism sustainability
2019
For many years the sustainability assessment of tourist destinations has been based on the carrying capacity, which is a measure that takes into account the preservation of a geographical area (by measuring the number of tourists, the visitor flow and the environmental thresholds) along with its tourist fruition (by assessing the quality of the experience perceived by visitors). Unfortunately, its definition lacks clarity, and its dependence upon qualitative variables makes it unable to provide a unique criterion for its assessment. In this paper we propose a fuzzy approach that takes into account the inherent uncertainty and vagueness of the involved variables to assess a destination’s sus…
Local maximal operators on fractional Sobolev spaces
2016
In this note we establish the boundedness properties of local maximal operators MG on the fractional Sobolev spaces Ws;p(G) whenever G is an open set in Rn, 0 < s < 1 and 1 < p < 1. As an application, we characterize the fractional (s;p)-Hardy inequality on a bounded open set by a Maz'ya-type testing condition localized to Whitney cubes. pq(G) whenever G is an open set in R n , 0 < s < 1 and 1 < p;q <1. Our main focus lies in the mapping properties of MG on a fractional Sobolev space W s;p (G) with 0 < s < 1 and 1 < p < 1, see Section 2 for the denition or (3) for a survey of this space. The intrinsically dened function space W s;p (G) on a given domain G coincides with the trace space F s …
French firms’ strategies for protecting their intellectual property
2012
In attempting to protect their innovations, firms can choose from a range of mechanisms, which may be either non-statutory (trade secrets, design complexity, and lead-time advantage over competitors) or statutory (patent, design registration, trademark, copyright). Yet, little is known about how firms do actually make their choices from among these different appropriability mechanisms. The aim of this paper is to determine how French firms’ use of intellectual property protection mechanisms relates to the type of innovation, the characteristics of the market sector in which they operate, the firms’ characteristics, and their human resources strategies. Our empirical model draws on four Fren…
Multilayer neural networks: an experimental evaluation of on-line training methods
2004
Artificial neural networks (ANN) are inspired by the structure of biological neural networks and their ability to integrate knowledge and learning. In ANN training, the objective is to minimize the error over the training set. The most popular method for training these networks is back propagation, a gradient descent technique. Other non-linear optimization methods such as conjugate directions set or conjugate gradient have also been used for this purpose. Recently, metaheuristics such as simulated annealing, genetic algorithms or tabu search have been also adapted to this context.There are situations in which the necessary training data are being generated in real time and, an extensive tr…
Governance forms drivers in bio-pharmaceutial inter-firm relationships
2012
Networking benefits are acknowledged by many studies in the industrial organization and strategic management fields; transaction cost theory agency and property right theory provide the economic foundations to the market-hierarchy dilemma; while Resource based-view (RBV), relational and evolutionary theories provide the strategic foundation of the inter-firm relationships. All this theoretical strands investigate reasons that push firms to formalize their relationship in different governance structures. The bio-pharmaceutical industry has the characteristics to offer to the potential partners both exploitation or exploration alliances benefits. In particular some elements play a “pivot” rol…
Drivers influencing the governance of inter-firm relationships in the biopharmaceutical industry: an empirical survey in the Italian context
2013
This paper focuses on factors influencing the choice of the governance form in inter-firm relationships (IFRs) between pharmaceutical and biotechnology companies. By reviewing the relevant literature on transaction cost economics, property right theory, real option and resources-based view, we located some drivers that might influence such relationships and we formulated a set of hypotheses linking them to governance forms. Such a theoretical framework has been empirically tested through a survey conducted among the Italian companies associated to Farmindustria. Empirical results provide some interesting insights on how shaping bio-pharmaceutical deals; we found that the developmental stage…
How the purpose of the inter-firm relationships influences the choice of the governance form: evidence from the machine tool and the pharmaceutical i…
2013
In today's competitive landscape, the choice of the appropriate mode to govern an inter-firm relationship is a critical factor for companies. In the literature several theoretical strands have examined the impact of the purpose of inter-firm relationships on the forms of governance. Building on a robust literature review on the topic, this study focuses on a specific issue influencing the choice of the form of governance in inter-firm relationships, i.e. the purpose of inter-firm relationships with relation to partner's resources. We gather in a unique framework three typologies of partner's resources, i.e. production, R&D and marketing, and through two empirical analyses in two different I…
Pre-requisites of successful strategic electronic coordination : the moderation effect of the ownership mechanism of inter-organisational information…
2017
In this paper, we attempt to explain how the ownership mechanism of an interorganisational information system (IOS) may impact strategic information exchange (electronic coordination) induced by specific investments in the IOS. Recent research and practice show that heavy investments in IOSs demonstrate mixed results with respect to their impact on the electronic coordination. Consequently, the search of additional factors is needed to help and explain under what circumstances the IOS investments for strategic purposes become beneficial for the companies in a buyersupplier dyad. Transaction cost economics (TCE) and the hostage model are used as a framework for the research. 198 observations…