Marrakesh: a centre for tortoise trade

Progressive Collapse of the World Trade Centre: a Simple Analysis

The collapse behaviour of the World Trade Centre (WTC) towers is considered formally as a propagating instability phenomenon. The application of associated concepts enables the residual capacities of both towers after the onset of collapse to be formally estimated. This information is combined into a simplified variable-mass collapse model of the overall dynamical behaviour. The resulting, non-...

A Two-headed Tortoise.

Is Gopherus agassizii a Desert-Adapted Tortoise, or an Exaptive Opportunist? Implications for Tortoise Conservation

– The desert tortoise (Gopherus agassizii) has traditionally been viewed as an archetypal desert-adapted vertebrate. However, evidence from historical ecology, phylogenetics, anatomy, physiology, and biogeography qualifies this view significantly. Ancestors of G. agassizii stabilized as an essentially modern morph some 17-19 million yrs ago ago, perhaps 12 million yrs before the formation of ma...

Trade and National Security: A Test for Best-Known Hypothesis

National security depends on soft power, the ability of a country to generate and use its economic power and to project its national values. It also depends on long-term factors that contribute to economic growth and increase the total resources base available not only for defense but to provide economic security in the form of income and business opportunities for individuals. The economic iss...

The Economics of a Lost Deal : Kyoto - The Hague - Marrakesh

This paper examines prospects for compromise between competing perspectives on four key climate change issues: costs, level of domestic action, environmental integrity, and developing world involvement. It focuses on the policy issues stemming from the uncertainty about abatement costs. Based on extensive simulations of a model integration tool, SAP12 (Stochastic Assessment of Climate Policies,...