Despite the publication of three independent papers that reported sightings of the Ivory-billed Woodpecker (Campephilus principalis), its preservation became a controversial topic because nobody has been able to obtain a distinct photo, which is considered the standard form of evidence for documenting birds. An analysis based on a combination of factors related to habitat and behavior suggests ...

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 ...

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 ...

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...

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...

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...

The paper investigates the role of knowledge management in enabling project success, innovation, completion times, operational efficiency and the generation of new knowledge in development projects. Four projects in Uganda, Nigeria, and Cote d‘Ivoire were used as case studies. The objective was to explore the nature of knowledge management practices in these projects in order to see how they co...

Abstract This paper examines the relationship between democracy and economic growth in 30 Sub-Saharan African countries. As our proxy for democracy we first use the democracy index constructed by Freedom House and then check the sensitivity of our findings using, as an alternative proxy for democracy, the Legislative Index of Electoral Competitiveness (LIEC). We find support for the Lipset hypo...