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Publications

Publications by CEGI

2014

PRACTICES AND PLATFORMS FOR ALIGNING HIGHER EDUCATION TO THE EUROPEAN TRENDS IN SERVICE INNOVATION

Authors
Borangiu, T; Ionita, AD; Dragoicea, M; Falcao e Cunha, JFE;

Publication
LET'S BUILD THE FUTURE THROUGH LEARNING INNOVATION!, VOL III

Abstract
Service innovation represents a challenge that has to be supported by specific actions of the higher education professionals. At European level, it was promoted by platforms developed under the Europe INNOVA and other initiatives, and it is now an important priority of the Europe 2020 strategy. Therefore, the academic environment should get aligned to this trend and prepare students for the complex character of the future service systems. This paper presents best practices and platforms to support an action programme for getting aligned to the European trends in service innovation, undertaken within the ESF / POSDRU project INSEED (Strategic Programme for promoting Innovation in Services by Open and Continuous Education). The programme has five main objectives, described here through their specific actions and their applied practices, like comprehending the strategies, programmes and organisms related to the European Commission, or analyzing the knowledge gaps. An important result of this programme is the Service Engineering Master (SEM) from the Automation and Computer Science Faculty, University Politehnica of Bucharest, which is related to other educational programmes on service science from Europe. As support for creating a global educational environment, the paper also presents the INSER@SPACE collaborative platform developed by INSEED, with its three components: (i) a learning management system dedicated to educational courses concerning services; (ii) a semantic wild on service science for creating an international community based on a clearly defined knowledge environment; (iii) educational resources provided as a service, with configurations dedicated to learning new technologies for service innovation.

2014

Competitive positioning and performance assessment in the construction industry

Authors
Horta, IM; Camanho, AS;

Publication
EXPERT SYSTEMS WITH APPLICATIONS

Abstract
The purpose of this paper is to characterize the competitive positioning of the construction industry companies and evaluate their financial performance. The methodology proposed involves three major stages., The first stage concerns the identification of the competitive positioning of companies within the construction sector. This is achieved using a hierarchical clustering algorithm suitable for large datasets and mixed type variables. The second stage is the analysis of performance of the different clusters. This is done using the Data Envelopment Analysis technique. To characterize in detail the main performance features of each cluster, a decision tree is used to extract the main rules concerning the performance spread within each cluster and the gap between the cluster best practices and the national benchmarks. The third stage concerns the analysis of the strengths, weaknesses and areas of potential improvement for contractors in each competitive positioning. This required the analysis of benchmark companies of each cluster. The methodology proposed was applied for the analysis of performance of all contractors that operate in the Portuguese construction industry.

2014

Enhancing the performance of quota managed fisheries using seasonality information: The case of the Portuguese artisanal dredge fleet

Authors
Oliveira, MM; Camanho, AS; Gaspar, MB;

Publication
MARINE POLICY

Abstract
Several fisheries across the world are managed by a quota regime. These quotas can be set yearly, monthly, weekly or daily. However, for some fish species demand seasonality may occur, which should be taken into consideration in the establishment of the quota (especially in those fisheries managed by daily or monthly quotas). This would allow fishermen to catch more fish at times of the year with higher demand in detriment of periods when demand is low. The present work investigates the existence of demand seasonality for bivalves from the artisanal dredge fleet. This fleet operates along the entire coast of the Portugal mainland. The analysis of fleets' revenue efficiency is assessed with Data Envelopment Analysis models, and the monthly seasonality effects on the revenue efficiency were tested using a Tobit regression. The results revealed that on the South coast there is a strong demand in the summer whereas on the western coast (northwest and southwest fishing areas) demand increases during Christmas and New Year festivities. Since this fishery is managed by weekly/daily quotas, it is proposed that these quotas should be redistributed in order to adjust them to periods of higher demand, thereby increasing the profitability of the vessels. The approach followed could be applied to similar fisheries worldwide.

2014

Benchmarking dos serviços dos hospitais portugueses: uma aplicação de data envelopment analysis

Authors
Castro, RAS; Portela, CS; Camanho, AS;

Publication
Investigação operacional em ação: casos de aplicação

Abstract

2014

An extended kernel density two-step floating catchment area method to analyze access to health care

Authors
Polzin, P; Borges, J; Coelho, A;

Publication
ENVIRONMENT AND PLANNING B-PLANNING & DESIGN

Abstract
In Portugal the distribution of physicians is considered an appropriate proxy for the distribution of the actual hospital resources and additional information on hospital supply is mostly unavailable, while health care utilization data are also usually absent. A suitable method that can be used to analyze patients' access to hospital health care in countries with such characteristics is the two-step floating catchment area (2SFCA) method, since it requires only the number of physicians to represent supply and the population size to estimate demand. An improved version of the 2SFCA method is the kernel density 2SFCA (KD2SFCA) method. However, this method was not developed to analyze access to health care and it computes scores that express only the spatial access dimensions of proximity and availability. In this paper we present a new method, based on the KD2SFCA method, which improves health care access analysis and better identifies populations that are less empowered to use health care. We adapt the KD2SFCA method for the context of health care access analysis and extend it to capture additional access dimensions. We applied the extended method to the Portuguese hospital health care sector in a case study, and compared its results with those obtained with the KD2SFCA method. Our method was able to improve the identification of the less empowered populations and discovered that they represent 8.1% of the total population, instead of 4.6%, and reside in sixteen of the eighteen Portuguese districts, instead of in thirteen, as identified by the original KD2SFCA method. By improving the KD2SFCA method for the identification of the less empowered populations, our method can be a first step in an endeavor to identify opportunities to increase the health care supply or to redistribute supply resources, with the objective of increasing the access of those deprived populations.

2014

Semantically Enriched Variable Length Markov Chain Model for Analysis of User Web Navigation Sessions

Authors
Shirgave, S; Kulkarni, P; Borges, J;

Publication
INTERNATIONAL JOURNAL OF INFORMATION TECHNOLOGY & DECISION MAKING

Abstract
The rapid growth of the World Wide Web has resulted in intricate Web sites, demanding enhanced user skills to find the required information and more sophisticated tools that are able to generate apt recommendations. Markov Chains have been widely used to generate next-page recommendations; however, accuracy of such models is limited. Herein, we propose the novel Semantic Variable Length Markov Chain Model (SVLMC) that combines the fields of Web Usage Mining and Semantic Web by enriching the Markov transition probability matrix with rich semantic information extracted from Web pages. We show that the method is able to enhance the prediction accuracy relatively to usage-based higher order Markov models and to semantic higher order Markov models based on ontology of concepts. In addition, the proposed model is able to handle the problem of ambiguous predictions. An extensive experimental evaluation was conducted on two real-world data sets and on one partially generated data set. The results show that the proposed model is able to achieve 15-20% better accuracy than the usage-based Markov model, 8-15% better than the semantic ontology Markov model and 7-12% better than semantic-pruned Selective Markov Model. In summary, the SVLMC is the first work proposing the integration of a rich set of detailed semantic information into higher order Web usage Markov models and experimental results reveal that the inclusion of detailed semantic data enhances the prediction ability of Markov models.

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