Laurence Dooley

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Next generation heterogeneous wireless networks offer the end users with assurance of QoS inside each access network as well as during vertical handoff between them. For guaranteed QoS, the vertical handoff algorithm must be QoS aware, which cannot be achieved with the use of traditional RSS as the vertical handoff criteria. In this paper, we propose a(More)
MOTIVATION Microarray data are used in a range of application areas in biology, although often it contains considerable numbers of missing values. These missing values can significantly affect subsequent statistical analysis and machine learning algorithms so there is a strong motivation to estimate these values as accurately as possible before using these(More)
The success of a pervasive sensor network (PSN) of ubiquitous loco-dynamic devices mainly depends on its ability to configure itself according to the environment and the available resources to achieve optimum performance. This self configuring property is indispensable as ad hoc devices are usually exposed to natural or man-made disasters due to the hostile(More)
Although often presented as a single basis for educational visual screen design, Gestalt theory is not a single small set of visual principles uniformly applied by all designers. In fact, it appears that instructional visual design literature often deals with only a small set of Gestalt laws. In this project Gestalt literature was consulted to distil the(More)
Existing vertex-based operational rate-distortion (ORD) optimal shape coding algorithms use a vertex band around the shape boundary as the source of candidate control points (CP) usually in combination with a tolerance band (TB) and sliding window (SW) arrangement, as their distortion measuring technique. These algorithms however, employ a fixed vertex-band(More)
Base station (BS) sleeping in cellular networks has emerged as a promising solution for more energy efficient communications, concomitant with lowering the network carbon footprint. Switching off specific BS entirely however, can lead to coverage holes and severe performance degradation. To avoid coverage holes, the transmit power of neighbouring BS must be(More)
Distributed video coding (DVC) reverses the traditional coding paradigm of complex encoders allied with basic decoding, to one where the computational cost is largely incurred by the decoder. This enables low-cost, resource-poor sensors to be used at the transmitter in various applications including multi-sensor surveillance. A key constraint governing DVC(More)
This work addresses the twin issues of overlapping and blocking artifacts in Distributed Video Coding side information (SI). These both emanate from the block matching algorithm (BMA) used for motion vector (MV) generation rather than pixel-wise processing. In temporal correlation exploitation and particularly in the formulation of higher-order piecewise(More)
The generic fuzzy rule-based image segmentation technique (GFRIS) does not produce good results for non-homogeneous reg’ons that possess abrupt changes in pixel intensity, because if fails to consider two important properties of perceptual grouping, namely surroundedness and connectedness. In this paper a new technique called exfended fuzzy rules for image(More)