Bayer colour filter arrays (CFA) are commonly used to obtain digital colour imagery from a single-chip CCD or CMOS camera. Colour information is captured via a regular array of colour filters placed over the image sensor, and the full colour image is reconstructed in a demosaicing process. Colour imagery derived in such a way is prone to visual artefacts including false colours, poor edge defin...

Résumé : Dans cet article, nous jetons les bases d’une ontologie formelle permettant de rendre compte de la nature générale des artefacts. L’objectif visé par une telle ontologie est d’aider à structurer des ontologies d’application dans des domaines où des artefacts spécifiques sont présents, autrement dit pratiquement tout domaine d’activité ! La conceptualisation s’appuie sur une littérature...

Our approach towards context awareness is to retrieve contextual information by augmenting our daily life objects (like a chair, a mirror etc.) with sensing capabilities. We call such artefacts sentient artefacts. To avoid developing dedicated context-aware application integrating these artefacts, there is a need for a generic computing platform that can assist application programmers to develo...

Non-reproducible sequence artefacts are frequently detected in DNA from formalinfixed and paraffin-embedded (FFPE) tissues. However, no rational strategy has been developed for reduction of sequence artefacts from FFPE DNA as the underlying causes of the artefacts are poorly understood. As cytosine deamination to uracil is a common form of DNA damage in ancient DNA, we set out to examine whethe...

This paper presents a method of objective evaluation of the edge blur and ringing artefacts produced by image codecs. It is difficult to detect and measure individual artefacts in coded images. A synthetic test image is developed to separate and measure edge blur and ringing artefacts due to image compression. The influence of pixel intensity gradient on the quality metrics is investigated, the...

The importance of assessing the metal-induced artefacts in magnetic resonance imaging (MRI)-guided brachytherapy is growing along with the increasing interest of integrating MRI into the treatment procedure of cervical cancer. Examples of metal objects in use include intracavitary cervical applicators and interstitial needles. The induced artefacts increase the uncertainties in the clinical wor...

We explore how physical artefacts can be connected to digital records of where they have been, who they have encountered and what has happened to them, and how this can enhance their meaning and utility. We describe how a travelling technology probe in the form of an augmented acoustic guitar engaged users in a design conversation as it visited homes, studios, gigs, workshops and lessons, and h...

Adaptation of the Design Science Research methodology has never been easy. There have always been concerns regarding the validity of design science and the evaluation of the artefacts generated therewith and the subsequent claims of the researchers. To address these problems we propose an artefact-centric creation and evaluation methodology for design science research. This methodology begins w...

Based on Fligstein’s (1990) work on ‘conceptions of control’ (broad managerial paradigms), this paper provides an analysis of the ways in which information technology (IT) artefacts shape and are shaped by institutional contexts. Specifically, we report on primary and secondary empirical data that spans a 44-year period pertaining to the uses made of the Amazon rainforest monitoring system (a s...

In this paper we discuss research work that enables the development of mixed societies of communicating plants and artefacts. PLANTS is an EUfunded Research and Development project, which aims to investigate methods of creating “interfaces” between artefacts and plants in order to enable people to form mixed, interacting (potentially co-operating) communities. Amongst others the project aims to...