Centro Universitario FEI: Recent submissions
Now showing items 1441-1460 of 2258
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A qualitative spatial representation of string loops as holes
(2016)© 2016 Published by Elsevier B.V.This research note contains an extension of a previous work by Cabalar and Santos (2011) that formalised several spatial puzzles formed by strings and holes. That approach explicitly ignored ... -
Reasoning about shadows in a mobile robot environment
(2013)This paper describes a logic-based formalism for qualitative spatial reasoning with cast shadows (Perceptual Qualitative Relations on Shadows, or PQRS) and presents results of a mobile robot qualitative self-localisation ... -
Reasoning about depth and motion from an observer's viewpoint
(2007)The goal of this paper is to present a logic-based formalism for representing knowledge about objects in space and their movements, and show how this knowledge could be built up from the viewpoint of an observer immersed ... -
Inductive learning spatial attention
(2008)This paper investigates the automatic induction of spatial attention from the visual observation of objects manipulated on a table top. In this work, space is represented in terms of a novel observer-object relative reference ... -
Formalising the fisherman's folly puzzle
(2011)This paper investigates the challenging problem of encoding the common sense knowledge involved in the manipulation of spatial objects from a reasoning about actions and change perspective. In particular, we propose a ... -
Protocols from perceptual observations
(2005)This paper presents a cognitive vision system capable of autonomously learning protocols from perceptual observations of dynamic scenes. The work is motivated by the aim of creating a synthetic agent that can observe a ... -
The space within fisherman's folly: Playing with a puzzle in mereotopology
(2008)In this paper we propose a spatial ontology for reasoning about holes, rigid objects and a string, taking a classical puzzle as a motivating example. In this ontology the domain is composed of spatial regions whereby a ... -
The perception and content of cast shadows: An interdisciplinary review
(2011)Recently, psychologists have turned their attention to the study of cast shadows and demonstrated that the human perceptual system values information from shadows very highly in the perception of spatial qualities, sometimes ... -
Logic-based interpretation of geometrically observable changes occurring in dynamic scenes
(2009)The work presented here is about employing a theory of updates to study geometrically observable changes that occur in spatial information about image sequences of a dynamic scene. The logical framework consists of a ... -
Influence of geometrical parameters on the DC analog behavior of the asymmetric self-cascode FD SOI nMOSFETs
(2018)© 2018, Brazilian Microelectronics Society. All rights reserved.This paper assesses the DC analog performance of a composite transistor named Asymmetric Self-Cascode structure, which is formed by two Fully Depleted SOI ... -
Non-linear model for pseudo CMOS resistors addressing the recovery time in bio-amplifiers
(2019)© 2019 IOP Publishing Ltd.This work presents a new fast model, based on piecewise linear (PWL) methodology, for pseudo-resistors SPICE simulation, including the non-linear working range, fully supported by experimental ... -
Selection of suitable hand gestures for reliable myoelectric human computer interface
(2015)© Castro et al.Background: Myoelectric controlled prosthetic hand requires machine based identification of hand gestures using surface electromyogram (sEMG) recorded from the forearm muscles. This study has observed that ...