Among technological options to mitigate greenhouse gas (GHG) emissions, Carbon Capture and Storage technology (CCS) seems particularly promising. This technology allows to keep on extracting polluting fossil fuels without drastically increasing CO2 atmospheric concentration. We examine here a two-sector model with two primary energy resources, a polluting exhaustible resource and an expensive c...

Lengthening is the ideal hesitation strategy for synthetic speech and dialogue systems: it is unobtrusive and hard to notice, because it occurs frequently in everyday speech before phrase boundaries, in accentuation, and in hesitation. Despite its elusiveness, it allows valuable extra time for computing or information highlighting in incremental spoken dialogue systems. The elusiveness of the m...

Patterns of crosslinguistic variation in the expression of word meaning are informative about semantic organization, but most methods to study this are labor intensive and obscure the gradient nature of concepts. We propose an automatic method for extracting crosslinguistic co-categorization patterns from parallel texts, and explore the properties of the data as a potential source for automatic...

Surveillance cameras have become a customary security equipment in buildings and streets worldwide. It is up to thefieldof Computational Forensics toprovide automatedmethods for extracting andanalyzing relevant image data captured by such equipment. In this article, we describe an effective and semi-automatedmethod for detecting vanishing points, with their subsequent application to the problem...

We propose a method for computer analysis of 3D-scanned lithic artifacts. It provides a detailed description of the scars and ridges that were left on the surface of the stone tool while it was produced by knapping. Traditional documentation and research methods are based on hand drawn images of stone tools and manual measurements. Our algorithm enables automatic, objective and precise document...

Polynomial filtering can provide a highly effective means of computing all eigenvalues of a real symmetric (or complex Hermitian) matrix that are located in a given interval, anywhere in the spectrum. This paper describes a technique for tackling this problem by combining a ThickRestart version of the Lanczos algorithm with deflation (‘locking’) and a new type of polynomial filters obtained fro...

Extraction of bone contours from x-ray images is an important first step in computer analysis of medical images. It is more complex than the segmentation of CT and MR images because the regions delineated by bone contours are highly nonuniform in intensity and texture. Classical segmentation algorithms based on homogeneity criteria are not applicable. This thesis presents a model-based approach...

We examine the impact of political and criminal accountability on economic growth. Governments seek to maximize their own consumption by extracting rents that are costly to growth. When citizens are able to depose politicians through elections, governments are tightly controlled. The rents politicians are able to extract increase in the length of their term. The effect of the threshold of crimi...

This paper looks at the problem of detecting aws or anomalies in greyscale images. A generic approach is adopted which uses little prior knowledge of the type of image. We assume only that most of the image will consist of`background', and that any anomaly will be relatively small in area. The methods explored involve extracting localised, but scale invariant features from an image and expressi...