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Browsing ESEIG - INF - Livros, partes de livro ou capítulos de livro by Author "Leal, José Paulo"
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- An example-based generator of XSLT programsPublication . Leal, José Paulo; Queirós, RicardoXSLT 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.
- A comparative study on LMS interoperabilityPublication . Leal, José Paulo; Queirós, RicardoA Learning Management System (LMS) plays an important role in any eLearning environment. Still, the LMS cannot afford to be isolated from other systems in an educational institution. Thus, the potential for interoperability is an important, although frequently overlooked, aspect of an LMS system. In this chapter we make a comparative study of the interoperability features of the most relevant LMS in use nowadays. We start by defining a comparison framework, with systems that are representative of the LMS universe, and interoperability facets that are representative of the type integration with other broad classes of eLearning systems. For each interoperability facet we categorize and identify the most representative remote systems, we present a comprehensive survey of existing standards and we illustrate with concrete integration scenarios. Finally, we draw some conclusions on the status of interoperability in LMS based on our study.
- Design and implementation of an IDE for learning programming languages using a gamification servicePublication . Paiva, José Carlos; Leal, José Paulo; Queirós, RicardoThis chapter presents the architecture and design of Enki, an Integrated Development Environment (IDE) for learning programming languages on Massive Open Online Courses (MOOCs). This environment can be used as a tool by a Learning Management System (LMS) and a typical LMS such as Moodle can launch it using the Learning Tool Interoperability (LTI) API. Student authentication tokens are passed via LTI, thus integrating Enki in the single sign-on domain of the academic institution. The proposed tool has a web user interface similar to those of reference IDEs, where the learner has access to different integrated tools, from viewing tutorial videos, to solving programming exercises that are automatically evaluated. Enki uses several gamification strategies to engage learners, including generic gamifications services provided by Odin and the sequencing of educational resources. The course content (videos, PDFs, programming exercises) is progressively disclosed to the learner as he successfully completes exercises. This is similar to what happens in a game, where new levels are unlocked as the previous are completed, thus contributing to the sense of achievement.
- Ensemble: an innovative approach to practice computer programmingPublication . Queirós, Ricardo; Leal, José PauloCurrently, 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.
- Feeding the beast: managing your collections of problemsPublication . Leal, José Paulo; Queirós, RicardoFeeding the beast: managing your collections of problems
- From e-learning systems to specialised e-learning servicesPublication . Leal, José Paulo; Queirós, RicardoLearning systems are evolving from component based and centralized architectures towards service oriented and decentralized architectures. The standardization of e-learning content and interoperability is a powerful force in this evolution. In this chapter we put in perspective the evolution of e-learning systems and standards, and argue that specialized services will play an important role in future learning systems, especially in those targeted for competitive learning.
- Making programming exercises interoperable with PExILPublication . Queirós, Ricardo; Leal, José PauloSeveral standards have appeared in recent years to formalize the metadata of learning objects, but they are still insufficient to fully describe a specialized domain. In particular, the programming exercise domain requires interdependent resources (e.g. test cases, solution programs, exercise description) usually processed by different services in the programming exercise lifecycle. Moreover, the manual creation of these resources is time-consuming and error-prone, leading to an obstacle to the fast development of programming exercises of good quality. This chapter focuses on the definition of an XML dialect called PExIL (Programming Exercises Interoperability Language). The aim of PExIL is to consolidate all the data required in the programming exercise lifecycle from when it is created to when it is graded, covering also the resolution, the evaluation, and the feedback. The authors introduce the XML Schema used to formalize the relevant data of the programming exercise lifecycle. The validation of this approach is made through the evaluation of the usefulness and expressiveness of the PExIL definition. In the former, the authors present the tools that consume the PExIL definition to automatically generate the specialized resources. In the latter, they use the PExIL definition to capture all the constraints of a set of programming exercises stored in a learning objects repository.
- Your personal archival: repository serverPublication . Leal, José Paulo; Queirós, RicardoYour personal archival: repository server