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Publications

2015

Eery Space: Facilitating Virtual Meetings Through Remote Proxemics

Authors
Sousa, M; Mendes, D; Ferreira, A; Pereira, JM; Jorge, J;

Publication
HUMAN-COMPUTER INTERACTION - INTERACT 2015, PT III

Abstract
Virtual meetings have become increasingly common with modern video-conference and collaborative software. While they allow obvious savings in time and resources, current technologies add unproductive layers of protocol to the flow of communication between participants, rendering the interactions far from seamless. In this work we introduce Remote Proxemics, an extension of proxemics aimed at bringing the syntax of co-located proximal interactions to virtual meetings. We propose Eery Space, a shared virtual locus that results from merging multiple remote areas, where meeting participants' are located side-by-side as if they shared the same physical location. Eery Space promotes collaborative content creation and seamless mediation of communication channels based on virtual proximity. Results from user evaluation suggest that our approach is sufficient to initiate proximal exchanges regardless of their geolocation, while promoting smooth interactions between local and remote people alike.

2015

Investigation on AUTOSAR-Compliant Solutions for Many-Core Architectures

Authors
Becker, M; Dasari, D; Nelis, V; Behnam, M; Pinho, LM; Nolte, T;

Publication
2015 EUROMICRO CONFERENCE ON DIGITAL SYSTEM DESIGN (DSD)

Abstract
As of today, AUTOSAR is the de facto standard in the automotive industry, providing a common software architecture and development process for automotive applications. While this standard is originally written for singlecore operated Electronic Control Units (ECU), new guidelines and recommendations have been added recently to provide support for multicore architectures. This update came as a response to the steady increase of the number and complexity of the software functions embedded in modern vehicles, which call for the computing power of multicore execution environments. In this paper, we enumerate and analyze the design options and the challenges of porting AUTOSAR-based automotive applications onto multicore platforms. In particular, we investigate those options when considering the emerging many-core architectures that provide a more scalable environment than the traditional multicore systems. Such platforms are suitable to enable massive parallel execution, and their design is more suitable for partitioning and isolating the software components.

2015

Dynamic self-organization in holonic multi-agent manufacturing systems: The ADACOR evolution

Authors
Barbosa, J; Leitao, P; Adam, E; Trentesaux, D;

Publication
COMPUTERS IN INDUSTRY

Abstract
Nowadays, systems are becoming increasingly complex, mainly due to an exponential increase in the number of entities and their interconnections. Examples of these complex systems can be found in manufacturing, smart-grids, traffic control, logistics, economics and biology, among others. Due to this complexity, particularly in manufacturing, a lack of responsiveness in coping with demand for higher quality products, the drastic reduction in product lifecycles and the increasing need for product customization are being observed. Traditional solutions, based on central monolithic control structures, are becoming obsolete as they are not suitable for reacting and adapting to these perturbations. The decentralization of the complexity problem through simple, intelligent and autonomous entities, such as those found in multi-agent systems, is seen as a suitable methodology for tackling this challenge in industrial scenarios. Additionally, the use of biologically inspired self-organization concepts has proved to be suitable for being embedded in these approaches enabling better performances to be achieved. According to these principals, several approaches have been proposed but none can be truly embedded and extract all the potential of self-organization mechanisms. This paper proposes an evolution to the ADACOR holonic control architecture inspired by biological and evolutionary theories. In particular, a two-dimensional self-organization mechanism was designed taking the behavioural and structural vectors into consideration, thus allowing truly evolutionary and reconfigurable systems to be achieved that can cope with emergent requirements. The approach proposed is validated with two simulation use cases.

2015

Architecture to Support Quality of Service in Arrowhead Systems

Authors
Albano, Michele; Garibay-Martínez, Ricardo; Lino Ferreira, Luis;

Publication
INForum - Simpósio de Informática (INFORUM 2015).

Abstract
The Arrowhead project [1] considers to normalize all interactions involving embedded systems by mediating them through services. The Service Oriented Architecture (SOA) paradigm is applied to both the interactions that provide the service requested by the user, and other support actions such as the authentication and registration of the devices, and the services they provide, the look-up of devices and service provided, and orchestration of services for creation of more complex services. To this purpose, services are divided into Core Services, which are present in every environment supporting Arrowhead applications, and user services that implement the applications. The Core Services set comprises, at least, Authentication Service, Registration Service and Orchestration Service.

2015

Proceedings of the 6th International Conference on Software Development for Enhancing Accessibility and Fighting Info-exclusion, DSAI 2015, Sankt Augustin, Germany, June 10-12, 2015

Authors
Velasco, CA; Weber, G; Barroso, J; Mohamad, Y; Paredes, H;

Publication
DSAI

Abstract

2015

Comparison of Battery Models for Energy Storage Applications on Insular Grids

Authors
Rodrigues, EMG; Godina, R; Osorio, GJ; Lujano Rojas, JM; Matias, JCO; Catalao, JPS;

Publication
2015 AUSTRALASIAN UNIVERSITIES POWER ENGINEERING CONFERENCE (AUPEC)

Abstract
This paper explores different modelling techniques for representing electrochemical energy storage devices in insular power grid applications. Particular attention is given to Thevenin based and not Thevenin based models. A case study involving two insular power systems with renewable generation are used to stand out the performance of the selected battery technologies: Lithium-ion (Li-ion), Nickel-Cadmium (NiCd), Nickel-Metal Hydride (NiMH) and Lead Acid.

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