This study was performed to develop alternating dentine adhesion models that could help in the evaluation of a self-bonding dental composite. For this purpose dentine from human and ivory was characterized chemically and microscopically before and after acid etching using Raman and SEM. Mechanical properties of dentine were determined using 3 point bend test. Composite bonding to dentine, with ...

It is widely accepted that both browsing and querying techniques are needed for eecient retrieval of multimedia objects. In this paper, we present the design and implementation of an integrated object browsing and visual querying system called IVORY(Integrated Visual brOwsing and queRYing system) for object databases. In IVORY, users can rst browse multimedia objects, which are visualized using...

trade may be preferable to free trade, and the optimal level of regulation " stringency " (a trade ban, sale of ivory stockpiles, or regulated sale of ivory harvested from wild populations) depends on factors that are as yet poorly researched or understood. Furthermore, net revenues from ivory sales often are only part of the income generated from elephants. Such income may also include photo t...

Illegal wildlife trade has reached alarming levels globally, extirpating populations of commercially valuable species. As a driver of biodiversity loss, quantifying illegal harvest is essential for conservation and sociopolitical affairs but notoriously difficult. Here we combine field-based carcass monitoring with fine-scale demographic data from an intensively studied wild African elephant po...

This paper examines the impact of foreign aid on public sector fiscal behaviour in Côte d’Ivoire. A special interest is the relationship between aid, debt servicing and debt, given that Côte d’Ivoire is a highly indebted country. The theoretical model employed differs from those of previous studies by highlighting the interaction between debt servicing and the other fiscal variables. This model...

Putative audio recordings of the Ivory-billed Woodpecker (Campephilus principalis) are presented along with discussions of the videos from which they were extracted and the observations that were made when these data were obtained. On two occasions, high-pitched calls were heard coming from the direction of a bird that was identified in the field as an Ivory-billed Woodpecker. These calls seem ...