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Publications

Publications by SYSTEM

2016

Passenger Journey Destination Estimation From Automated Fare Collection System Data Using Spatial Validation

Authors
Nunes, AA; Dias, TG; Falcao e Cunha, JFE;

Publication
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS

Abstract
A methodology for estimating the destination of passenger journeys from automated fare collection (AFC) system data is described. It proposes new spatial validation features to increase the accuracy of destination inference results and to verify key assumptions present in previous origin-destination estimation literature. The methodology applies to entry-only system configurations combined with distance-based fare structures, and it aims to enhance raw AFC system data with the destination of individual journeys. This paper describes an algorithm developed to implement the methodology and the results from its application to bus service data from Porto. The data relate to an AFC system integrated with an automatic vehicle location system that records a transaction for each passenger boarding a bus, containing attributes regarding the route, the vehicle, and the travel card used, along with the time and the location where the journey began. Some of these are recorded for the purpose of allowing onboard ticket inspection but additionally enable innovative spatial validation features introduced by the methodology. The results led to the conclusion that the methodology is effective for estimating journey destinations at the disaggregate level and identifies false positives reliably.

2016

Residential building resource consumption: A comparison of Portuguese municipalities' performance

Authors
Horta, IM; Camanho, AS; Dias, TG;

Publication
CITIES

Abstract
The purpose of this paper is to develop a robust methodology to assess municipalities' performance concerning the consumption of resources in residential buildings. The assessment is carried out at a municipal level to inform decision makers about the relative position of their municipalities compared to others. In addition, the factors associated to better levels of municipal performance are identified, and the extent of their effects is quantified. The study uses an enhanced stochastic frontier panel model based on data of energy, water and materials consumption in Lisbon municipalities during the period 2003-2009. The study reveals that the municipalities' performance has remained stable over the years, although there are considerable differences in performance among municipalities. In addition, it is concluded that municipal performance tends to improve with the environmental policy expenditure and scale size, and decline with buildings' age, population density and the proportion of buildings with private ownership.

2016

Temporary user-centred networks for transport systems

Authors
Nunes, AA; Dias, TG; Zegras, C; Falcao e Cunha, JFE;

Publication
TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES

Abstract
The concept of Temporary User-Centred Networks (TUNs) for transport systems is introduced. Affinity in these networks is defined as the time-specific degree of equivalence between travel patterns of users in the system. TUNs reveal latent social structures typically invisible to their users, enabling circumstantial collaboration opportunities amongst them. To make TUNs explicit we quantify affinity as a combination of two measures: journey similarity and journey substitutability. In the urban public transport domain, TUNs enable the diffusion of knowledge across the system in real-time. This can assist passengers adjusting travel decisions to their preferences and objectives according to service status. An enriched Automated Fare Collection (AFC) system dataset is used to demonstrate the market potential of TUNs in the urban public transport domain.

2016

Specifying Modernization into Service-Oriented SaaS System in a Case of Public Transport Document Generator

Authors
Mahfudhi, MG; Dias, TG;

Publication
EXPLORING SERVICES SCIENCE (IESS 2016)

Abstract
The alignment of the information technology implementation with the ever-changing business strategies in an enterprise drives modernization of the legacy system. However, the existing modernization contexts have not adequately addressed the focus of customer experience and service-orientation within the SaaS system development. This paper investigates the modernization process of legacy system into SaaS system using services concept through multidisciplinary approach. Several best practices are discussed to propose the Service-Oriented Modernization Framework (SOMF) which involves the maturity model for evolution roadmap identification, the service-oriented SaaS reference architecture, and the User-Centered Service-Oriented Software Reengineering (UCSOSR) methodology. An industrial case study is demonstrated by applying the framework to develop the public transport document generator as a service. The modernization process described in the framework provides a comprehensive and systematic guideline in developing a scalable system. In conclusion, this research, by integrating service analysis and design with SOA towards the SaaS modernization, enables the creation of an agile business model to achieve competitive advantages.

2016

Using User-Generated Content to Explore Hotel Service Quality Dimensions

Authors
Migueis, VL; Novoa, H;

Publication
EXPLORING SERVICES SCIENCE (IESS 2016)

Abstract
A better evaluation and understanding of the client's perception of the service provided by hotels is critical for hotel managers, especially in the "Travel 2.0" era, where tourists not only access but also actively review the service provided. This paper analyses data automatically collected from TripAdvisor reviews regarding 2 star and 5 star hotels in Porto. TripAdvisor user generated content is explored through text mining techniques with the purpose of creating word clouds, synthesizing and prioritizing the aspects of the service raised by customers. Furthermore, this content is analyzed using the SERVQUAL model to identify the service quality dimensions most valued by guests of the two types of hotels. The results of the preliminary study demonstrate that the methodology proposed allows us to identify service perceptions with reasonable effectiveness, highlighting the potential of the procedure to become a complementary tool for hotel management.

2016

Experience from a Modelling and Simulation Perspective in Smart Transport Information Service Design

Authors
Dragoicea, M; Constantinescu, D; Falcao e Cunha, JFE;

Publication
EXPLORING SERVICES SCIENCE (IESS 2016)

Abstract
This paper presents experience obtained in modelling and simulation of stakeholder-driven interactions for improved transport service design. The presented results describe value-aware, service model driven design artefacts supporting smart transport service development. The Socio-Technical System Engineering process is used in order to generate modelling and simulation artefacts, based on an executable representation of requirements. As a case study, the paper presents an improved design approach for a city transport information service to support travellers with valuable information regarding planning a trip in a city. This attempt to integrate agent-based modelling and simulation experience into the development of smart transport services emphasises the role of the development platform that provides tools for model analysis, validation, simulation, and real-time animation. The development platform's role in transposing the above mentioned aspects in practice is emphasized and integration guidelines of the STSE process steps with the IBM Rational Rhapsody (R) development platform are described.

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