Ontology alignment through argumentation

Currently, the majority of matchers are able to establish simple correspondences between entities, but are not able to provide complex alignments. Furthermore, the resulting alignments do not contain additional information on how they were extracted and formed. Not only it becomes hard to debug the alignment results, but it is also difficult to justify correspondences. We propose a method to generate complex ontology alignments that captures the semantics of matching algorithms and human-oriented ontology alignment definition processes. Through these semantics, arguments that provide an abstraction over the specificities of the alignment process are generated and used by agents to share, negotiate and combine correspondences. After the negotiation process, the resulting arguments and their relations can be visualized by humans in order to debug and understand the given correspondences.(undefined

A first approach towards pervasive computing using current tools: a real example

The paper presents the real implementation of a system that empowers the traveling professional through the use of current tools and mobile platforms. A book selling system was developed and deployed in a server together with Pocket PC 2003 enabled PDA systems. The global vision of such systems is given and the current implementation is also presented

Tourism mobile and recommendation systems - a state of the art

Recommendation systems have been growing in number for the last fifteen years. To evolve and adapt to the demands of the actual society, many paradigms emerged giving birth to even more paradigms and hybrid approaches. Mobile devices have also been under an incredible growth rate in every business area, and there are already lots of mobile based systems to assist tourists. This explosive growth gave birth to different mobile applications, each having their own advantages and disadvantages. Since recommendation and mobile systems might as well be integrated, this work intends to present the current state of the art in tourism mobile and recommendation systems, as well as to state their advantages and disadvantages

PSiS Mobile

In this paper, we present a state of the art on applications of mobile devices to support decision of a tourist running on a trip. We focus on two types of applications, tourism recommendation and tourism guide, making a brief description of the main characteristics of each one of them. We also refer the main problems encountered on the development of applications for mobile devices, and present PSiS (Personalized Sightseeing Tours Recommendation System) Mobile, our proposal to a mobile recommendation and planning support system, which is designed to provide an effective support during the tourist visit, providing contextaware information and recommendations about places of interest (POI) to visit, based on tourist preferences and his current context

Personalized sightseeing tours support using mobile devices

In this paper, we present PSiS (Personalized Sightseeing Tours Recommendation System) Mobile. PSiS Mobile is our proposal to a mobile recommendation and planning support system, which is designed to provide effective support during the tourist visit with context-aware information and recommendations about places of interest (POI), exploiting tourist preferences and context

Ontology-based representation and generation of workflows for micro-task human-machine computation

Doctoral Program in Computer ScienceA crescente popularidade das plataformas de crowdsourcing de micro-tarefas levou ao aparecimento de novas abordagens baseadas em fluxos e workflows de micro-tarefas. Juntamente com estas novas abordagens, surgem novos desafios. A falta de estruturação dos dados das micro-tarefas torna difícil, por parte de quem solicita as tarefas, a inclusão de participantes máquina no processo de execução dos workflows. Outro desafio deve-se á falta de componentes que permitam o controlo do fluxo em workflows de micro-tarefas, embora estes componentes sejam comuns em abordagens de workflow tradicionais e em processos de negócio. Nesta tese, é proposto um método para a representação, construção, instanciação e execução de workflows de tarefas em ambientes de computação pessoa-máquina, baseado em ontologias. A representação é capaz de capturar a estrutura e a semântica das operações e dos seus dados, ao mesmo tempo que se mantém próxima do nível conceptual humano. Os workflows são construidos em duas dimensões: a dimensão de domínio estático e a dimensão (da tarefa) dinâmica. Isto permite que os dados de entrada e de saída dos workflows possam ser descritos exclusivamente de acordo com uma ontologia de domínio, de forma completamente independente da representação do workflow. Para que possa ser efetuada a instanciação e a execução da representação do workflow, foi implementado um motor de workflows baseado no método proposto. Para facilitar o papel do solicitador (ou requester) na criação de novas representações de workflows (ou workflow-definitions), um processo de construção semi-automático baseado em ontologias de domínio é também proposto. O processo foi implementado numa ferramenta de construção que permite a construção assistida, iterativa e visual de representações de workflows. O método de representação e o processo de construção propostos são avaliados através de múltiplos cenários de aplicação em diferentes domínios.The growing popularity of micro-task crowdsourcing platforms has led to new approaches based on workflows of micro-tasks. Along with these new approaches, new challenges have emerged. The unstructured nature of micro-tasks in terms of domain representation makes it difficult for task requesters to include machine workers in the workflow execution process. Also, the representation of these human-machine computation workflows lack the flow control components often found in traditional workflow and business process approaches. In this thesis, a method for the representation, construction, instantiation and execution of human-machine computation task workflows through ontologies is proposed. The representation captures the structure and semantics of the tasks and their domain, while remaining close to the human conceptual level. Workflows are built according to two dimensions: the static domain dimension and the dynamic (task) dimension. This allows the input and the output of workflows to be described according to a domain ontology, completely independent from the workflow representation. The instantiation and execution of the represented workflow can be performed through the implemented workflow engine. To aid the requester in the creation of new workflow representations (or workflowdefinitions), a semi-automatic construction process based on domain ontologies is also proposed. The process has been implemented into a construction framework that allows the aided, iterative and visual construction of workflow-definitions. The proposed method and construction process is evaluated through several application scenarios in different domains.Portuguese Foundation for Science and Technology within the doctoral grant SFRH/BD/ 70302/2010

Recommendation & mobile systems - a state of the art for tourism

Recommendation systems have been growing in number over the last fifteen years. To evolve and adapt to the demands of the actual society, many paradigms emerged giving birth to even more paradigms and hybrid approaches. These approaches contain strengths and weaknesses that need to be evaluated according to the knowledge area in which the system is going to be implemented. Mobile devices have also been under an incredible growth rate in every business area, and there are already lots of mobile based systems to assist tourists. This explosive growth gave birth to different mobile applications, each having their own advantages and disadvantages. Since recommendation and mobile systems might as well be integrated, this work intends to present the current state of the art in tourism mobile and recommendation systems, as well as to state their advantages and disadvantages

An ontology for human-machine computation workflow specification

Lately, a focus has been given to the re-usability of workflow defini-tions and to flexible and re-usable workflow components, culminating with ap-proaches that harness the benefits of the enriched semantics provided by ontol-ogies. Following this trend and the needs of multiple application domains, such as micro-task crowdsourcing and ambient assisted living, of incorporating co-operation between the efforts of human and machine entities, this paper propos-es an ontology and process for the definition, instantiation and execution of se-mantically enriched workflows.This work is partially funded by FEDER Funds and by the ERDF (European Regional Development Fund) through the COMPETE Programme (operational programme for competitiveness) and by National Funds through the FCT (Portuguese Foundation for Science and Technology) under the projects AAL4ALL (QREN13852) and FCOMP-01-0124-FEDER-028980 (PTDC/EEI-SII/1386/2012)

Creating and optimizing client-server applications on mobile devices

Mobile devices are embedded systems with very limited capacities that need to be considered when developing a client-server application, mainly due to technical, ergonomic and economic implications to the mobile user. With the increasing popularity of mobile computing, many developers have faced problems due to low performance of devices. In this paper, we discuss how to optimize and create client-server applications for in wireless/mobile environments, presenting techniques to improve overall performance

Recommendation and planning through mobile devices in tourism context

In this paper we present a mobile recommendation and planning system, named PSiS Mobile. It is designed to provide effective support during a tourist visit through context-aware information and recommendations about points of interest, exploiting tourist preferences and context. Designing a tool like this brings several challenges that must be addressed. We discuss how these challenges have been overcame, present the overall system architecture, since this mobile application extends the PSiS project website, and the mobile application architecture.The authors would like to acknowledge FCT, FEDER, POCTI, POSI, POCI and POSC for their support to GECAD unit, and the project PSIS (PTDC/TRA/ 72152/2006)