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Modeling business relationships

Enterprise modeling requires, of course, to pay attention to different kinds of business relationships. In many cases, we really need to talk of such relationships, for instance where the contractual conditions that regulate them evolve in time, or when such conditions are violated. In terms of conceptual modeling, this means that relationships need to be reified, that is, they need to be put in the domain of discourse. In this talk, I will first introduce the ontological basis of relationships reification, according to which relationships are seen as truthmakers of relations. I will then discuss two actual case studies, concerning respectively the core relations used to model economic transactions in the REA ontology, and the relations within a complex service system.

access_time May 22, 2019 at 01:30PM
place Alameda - Auditório FA3 - Pavilhão Informática III e TagusPark - Sala 2N1.5 (videoconferência)
local_offer DEI on Wednesday
face Nicola Guarino

What Rhymes With Critical Design?

Critical practices and design practices are both (at least) centuries-old. Further, as any design history makes clear, designing and criticality have often worked side-by-side. Dunne and Raby recently developed a distinctive practice that they called Critical Design, which has clearly resonated with many throughout the design world. Many researchers, myself included, have remarked that Dunne & Raby's Critical Design narrows both criticality and design in order to achieve a coherent practice. The risk--and I believe it is happening--is that the design community treats their specific practice as paradigmatic of the whole idea of designing with criticality, narrowing and even foreclosing the extraordinary potentials of criticality in design. In this presentation, I explore points where design epistemologies and critical epistemologies appear to "rhyme," that is, where design practices and critical practices appear to be in alignment, though often with different vocabularies. Specifically, I offer a side-by-side analysis of design cognition and critical interpretation to reveal deep and surprising similarities. From this, I argue that we should not treat the intersection of criticality and design as if it were a specialized design subdomain, but instead that we should view criticality as a part of design and design as part of criticality. A role for design research, on such a view, is to develop theories and methods that open up ways of integrating criticality and design.

access_time May 15, 2019 at 01:30PM
place Alameda - Sala 0.19 - Pavilhão Informática II e TagusPark - Sala 2N1.5 (por videoconferência)
local_offer DEI on Wednesday
face Jeffrey Bardzell

Non-Traditional Uses of Video Games in Education

DEI às 4ªs com John E. Williamson. O convidado do próximo DEI às 4ªs será John Williamson, através do protocolo American Corners.

access_time April 24, 2019 at 01:30PM
place TagusPark - Sala 2N1.5 e Alameda - Sala 0.19 - Pavilhão Informática II (por videoconferência)
local_offer DEI on Wednesday
face John E. Williamson

Fidelity of Travel in Virtual Environments

Locomotion in Virtual Environments is currently a difficult and unnatural task to perform. Normally, researchers tend to devise ground-floor based metaphors, to constrain degrees of freedom (DoFs) during motion. These restrictions enable interactions closer to the way people walk in real life to provide high interaction fidelity. However, flying allows people to reach specific points in a virtual scene more expeditiously. Our experience suggests that high-fidelity techniques may also improve the flying experience, even though flying is not innate to humans, which requires the simultaneous control of multiple DoFs. We contribute the Magic Carpet, a family of methods that combines a floorproxy with a full-body representation, to avoid balance and cybersickness issues. This design allows separating degrees of freedom by addressing the indication direction and speed control travel phases travel separately. thereby promoting techniques with higher interaction fidelity. To choose the best representation suited for our design space, we implemented novel navigation metaphors while exploring different avatars with varying levels of either graphical or perspective fidelity. To validate our design space, we proposed two complementary studies, one for each travel phase. In our experimental evaluation, we present the results of both studies and identify the best suited techniques to be used in combination in the Magic Carpet approach. We applied both objective nd subjective measurements to evaluate efficiency, level of presence, and side-effects of the tested techniques inside our design space, such as physical fatigue and cybersickness. Our results show that the Magic Carpet family of methods supports novel techniques with a high degree of interaction fidelity for flying. While high interaction fidelity techniques are seemingly not the most efficient, the methods we explored allow a more precise speed control wrt other flying techniques. To prove the flexibility of our design space we conducted an additional evaluation with three Target-based techniques to assess both speed and transitions afforded by these techniques. Experimental Results show that methods that provide immediate user translation perform best and that phase transitions do not improve travel quality factors.

access_time April 17, 2019 at 09:30AM
place Sala Polivalente (0.17), Pavilhão de Informática II, IST, Alameda
local_offer Doctoral exam
person Candidate: Daniel Pires de Sá Medeiros
supervisor_account Advisor: Prof. Joaquim Armando Pires Jorge / Prof. Alberto Barbosa Raposo

Provas de Agregação em Engenharia Informática e de Computadores

Relatório da Unidade Curricular: Software Engineering Seminário: Measuring and Improving Software Fault Diagnosis

access_time April 15, 2019 at 02:30PM
place Anfiteatro PA-3 (Piso -1, Pavilhão de Matemática) IST, Alameda
local_offer Habilitation exam
person Candidate: Prof. Doutor Rui Filipe Lima Maranhão de Abreu

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