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About

About

I was born in Portugal in 1964. I graduated in mathematics from the Faculty of Sciences of the University of Porto and earned a Ph.D. in Computer Science from the same institution.
My current position is auxiliary professor at the Computer Science department of the Faculty of Sciences of the University of Porto. I am also affiliated with the Center for Research in Advanced Computing Systems (CRACS), an R&D unit of INESCTEC Research Laboratory, where I am an effective member.
My main research interests are technology enhanced learning, web adaptability, and semantic web.

Interest
Topics
Details

Details

  • Name

    José Paulo Leal
  • Cluster

    Computer Science
  • Role

    Senior Researcher
  • Since

    01st January 2009
Publications

2016

Enki: A Pedagogical Services Aggregator for Learning Programming Languages

Authors
Paiva, JoseCarlos; Leal, JosePaulo; Queirós, RicardoAlexandrePeixoto;

Publication
Proceedings of the 2016 ACM Conference on Innovation and Technology in Computer Science Education, ITiCSE 2016, Arequipa, Peru, July 9-13, 2016

Abstract
This paper presents Enki, a web-based IDE that integrates several pedagogical tools designed to engage students in learning programming languages. Enki achieves this goal (1) by sequencing educational resources, either expository or evaluative, (2) by using gamification services to entice students to solve activities, (3) by promoting social interaction and (4) by helping students with activities, providing feedback on submitted solutions. The paper describes Enki, its concept and architecture, details its design and implementation, and covers also its validation.

2016

Semantic Measures: How Similar? How Related?

Authors
Costa, T; Leal, JP;

Publication
WEB ENGINEERING (ICWE 2016)

Abstract
There are two main types of semantic measures (SM): similarity and relatedness. There are also two main types of datasets, those intended for similarity evaluations and those intended for relatedness. Although they are clearly distinct, they are similar enough to generate some misconceptions. Is there a confusion between similarity and relatedness among the semantic measure community, both the designers of SMs and the creators of benchmarks? This is the question that the research presented in this paper tries to answer. Authors performed a survey of both the SMs and datasets and executed a cross evaluation of those measures and datasets. The results show different consistency of measures with datasets of the same type. This research enabled us to conclude not only that there is indeed some confusion but also to pinpoint the SMs and benchmarks less consistent with their intended type.

2015

Long term goal oriented recommender systems

Authors
Nabizadeh, AH; Jorge, AM; Leal, JP;

Publication
WEBIST 2015 - 11th International Conference on Web Information Systems and Technologies, Proceedings

Abstract
The main goal of recommender systems is to assist users in finding items of their interest in very large collections. The use of good automatic recommendation promotes customer loyalty and user satisfaction because it helps users to attain their goals. Current methods focus on the immediate value of recommendations and are evaluated as such. This is insufficient for long term goals, either defined by users or by platform managers. This is of interest in recommending learning resources to learn a target concept, and also when a company is organizing a campaign to lead users to buy certain products or moving to a different customer segment. Therefore, we believe that it would be useful to develop recommendation algorithms that promote the goals of users and platform managers (e.g. e-shop manager, e-learning tutor, ministry of culture promotor). Accordingly, we must define appropriate evaluation methodologies and demonstrate the concept on practical cases.

2014

Ensemble: An innovative approach to practice computer programming

Authors
Queirós, R; Leal, JP;

Publication
Innovative Teaching Strategies and New Learning Paradigms in Computer Programming

Abstract
Currently, the teaching-learning process in domains, such as computer programming, is characterized by an extensive curricula and a high enrolment of students. This poses a great workload for faculty and teaching assistants responsible for the creation, delivery, and assessment of student exercises. The main goal of this chapter is to foster practice-based learning in complex domains. This objective is attained with an e-learning framework-called Ensemble-as a conceptual tool to organize and facilitate technical interoperability among services. The Ensemble framework is used on a specific domain: computer programming. Content issues are tacked with a standard format to describe programming exercises as learning objects. Communication is achieved with the extension of existing specifications for the interoperation with several systems typically found in an e-learning environment. In order to evaluate the acceptability of the proposed solution, an Ensemble instance was validated on a classroom experiment with encouraging results. © 2015, IGI Global.

2013

An Example-Based Generator of XSLT Programs

Authors
Leal, JP; Queiros, R;

Publication
INNOVATIONS IN XML APPLICATIONS AND METADATA MANAGEMENT: ADVANCING TECHNOLOGIES

Abstract
XSLT is a powerful and widely used language for transforming XML documents. However, its power and complexity can be overwhelming for novice or infrequent users, many of whom simply give up on using this language. On the other hand, many XSLT programs of practical use are simple enough to be automatically inferred from examples of source and target documents. An inferred XSLT program is seldom adequate for production usage but can be used as a skeleton of the final program, or at least as scaffolding in the process of coding it. It should be noted that the authors do not claim that XSLT programs, in general, can be inferred from examples. The aim of Vishnu-the XSLT generator engine described in this chapter-is to produce XSLT programs for processing documents similar to the given examples and with enough readability to be easily understood by a programmer not familiar with the language. The architecture of Vishnu is composed by a graphical editor and a programming engine. In this chapter, the authors focus on the editor as a GWT Web application where the programmer loads and edits document examples and pairs their content using graphical primitives. The programming engine receives the data collected by the editor and produces an XSLT program. Copyright (C) 2013, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited.

2013

Ensemble - an E-Learning Framework

Authors
Queiros, R; Leal, JP;

Publication
JOURNAL OF UNIVERSAL COMPUTER SCIENCE

Abstract
E-Learning frameworks are conceptual tools to organize networks of e-learning services. Most frameworks cover areas that go beyond the scope of e-learning, from course to financial management, and neglects the typical activities in everyday life of teachers and students at schools such as the creation, delivery, resolution and evaluation of assignments. This paper presents the Ensemble framework - an e-learning framework exclusively focused on the teaching-learning process through the coordination of pedagogical services. The framework presents an abstract data, integration and evaluation model based on content and communications specifications. These specifications must base the implementation of networks in specialized domains with complex evaluations. In this paper we specialize the framework for two domains with complex evaluation: computer programming and computer-aided design (CAD). For each domain we highlight two Ensemble hotspots: data and evaluations procedures. In the former we formally describe the exercise and present possible extensions. In the latter, we describe the automatic evaluation procedures.

2013

A Survey on eLearning Content Standardization

Authors
Queiros, R; Leal, JP;

Publication
Communications in Computer and Information Science

Abstract
eLearning has been evolved in a gradual and consistent way. Along with this evolution several specialized and disparate systems appeared to fulfill the needs of teachers and students such as repositories of learning objects, intelligent tutors, or automatic evaluators. This heterogeneity poses issues that are necessary to address in order to promote interoperability among systems. Based on this fact, the standardization of content takes a leading role in the eLearning realm. This article presents a survey on current eLearning content standards. It gathers information on the most emergent standards and categorizes them according three distinct facets: metadata, content packaging and educational design. © Springer-Verlag Berlin Heidelberg 2013.

2013

Using proximity to compute semantic relatedness in RDF graphs

Authors
Leal, JP;

Publication
COMPUTER SCIENCE AND INFORMATION SYSTEMS

Abstract
Extracting the semantic relatedness of terms is an important topic in several areas, including data mining, information retrieval and web recommendation. This paper presents an approach for computing the semantic relatedness of terns in RDF graphs based on the notion of proximity. It proposes a formal definition of proximity in terms of the set paths connecting two concept nodes, and an algorithm for finding this set and computing proximity with a given error margin. This algorithm was implemented on a tool called Shakti that extracts relevant ontological data for a given domain from DBpedia - a community effort to extract structured data from the Wikipedia. To validate the proposed approach Shakti was used to recommend web pages on a Portuguese social site related to alternative music and the results of that experiment are also reported.

2013

Managing experiments on cognitive processes in writing with HandSpy

Authors
Monteiro, C; Leal, JP;

Publication
COMPUTER SCIENCE AND INFORMATION SYSTEMS

Abstract
Experiments on cognitive processes require a detailed analysis of the contribution of many participants. In the case of cognitive processes in writing, these experiments require special software tools to collect gestures performed with a pen or a stylus, and recorded with special hardware. These tools produce different kinds of data files in binary and proprietary formats that need to be managed on a workstation file system for further processing with generic tools, such as spreadsheets and statistical analysis software. The lack of common formats and open repositories hinders the possibility of distributing the workload among researchers within the research group, of re-processing the collected data with software developed by other research groups, and of sharing results with the rest of the cognitive processes research community. This paper describes the development of Hand Spy, a collaborative environment for managing experiments in the cognitive processes in writing. This environment was designed to cover all the stages of the experiment, from the definition of tasks to be performed by participants, to the synthesis of results. Collaboration in Hand Spy is enabled by a rich web interface. To decouple the environment from existing hardware devices for collecting written production, namely digitizing tablets and smart pens, Hand Spy is based on the InkML standard, an XML data format for representing digital ink. This design choice shaped many of the features in Hand Spy, such as the use of an XML database for managing application data and the use of XML transformations. XML transformations convert between persistent data representations used for storage and transient data representations required by the widgets on the user interface. Despite being a system independent from a specific collecting device, for the system validation, a framework for data collection was created. This framework has also been highlighted in the paper due to the important role it took in a data collection process, of a scientific project to study the cognitive processes involved in writing.

2013

Automatic Generation and Delivery of Multiple-Choice Math Quizzes

Authors
Tomas, AP; Leal, JP;

Publication
PRINCIPLES AND PRACTICE OF CONSTRAINT PROGRAMMING, CP 2013

Abstract
We present an application of constraint logic programming to create multiple-choice questions for math quizzes. Constraints are used for the configuration of the generator, giving the user some flexibility to customize the forms of the expressions arising in the exercises. Constraints are also used to control the application of the buggy rules in the derivation of plausible wrong solutions to the quiz questions. We developed a prototype based on the core system of AGILMAT [18]. For delivering math quizzes to students, we used an automatic evaluation feature of Mooshak [8] that was improved to handle math expressions. The communication between the two systems - AgilmatQuiz and Mooshak - relies on a specially designed LATEX based quiz format. This tool is being used at our institution to create quizzes to support assessment in a PreCalculus course for first year undergraduate students.

2012

A distributed system for learning programming on-line

Authors
Elena Verdú; Luisa M. Regueras; María J. Verdú; José Paulo Leal; Juan P. de Castro; Ricardo Queirós

Publication
Comp & Edu - Computers & Education, vol.58, no.1, pp.1-10

Abstract

2012

Orchestration of E-Learning Services for Automatic Evaluation of Programming Exercises

Authors
Ricardo Queirós; José Paulo Leal

Publication
JUCS - Journal of Universal Computer Science, vol.18, no.11, pp.1454-1482

Abstract

Supervised
thesis

2017

Uma abordagem para evoluir sistemas web legado para web services

Author
Revailton de Souza Castro Junior

Institution
UP-FCUP

2017

Avaliação de diagramas no Mooshak 2.0

Author
Helder Patrick de Pina Correia

Institution
UP-FCUP

2017

EmoSpell, an Emotional Word Analyser

Author
Maria Inês Ferreira da Costa Maia

Institution
UP-FCUP

2016

Long term goal oriented recommender system

Author
Amir Hossein Nabizadeh Rafsanjani

Institution
UP-FCUP

2016

Integração e processamento de dados em experiências sobre processos cognitivos da escrita

Author
Patrícia Sofia Borges Santos

Institution
UP-FCUP