This paper explores the work of Nicolas Rashevsky, a Russian émigré theoretical physicist who developed a program in ‘‘mathematical biophysics’’ at the University of Chicago during the 1930s. Stressing the complexity of many biological phenomena, Rashevsky argued that the methods of theoretical physics – namely mathematics – were needed to ‘‘simplify’’ complex biological processes such as cell ...

We examine market making behavior of dealers for a sample of 55,988 corporate bonds, many of which trade infrequently. Dealers have a substantially higher propensity to offset trades within the same day rather than committing capital for longer periods, particularly for riskier and less actively traded bonds. Dealers’ holding periods do not decline with liquidity, and in fact are lowest for som...

Thirteen hermit crab species of the families Diogenidae, Paguridae and Parapaguridae were captured in deep waters off Mauritania during Maurit surveys. A new species of the genus Paguristes, Paguristes candelae n. sp., is described.        Areopaguristes mauritanicus n. comb. is proposed for Paguristes mauritanicus Bouvier, 1906 and Pseudopaguristes     marocanus n. comb. for Paguristes marocan...

Cloud-based applications are everywhere around us. They range from performance sensitive services such as web search, e-commerce, and social networking to mission-critical applications such as air-traffic control and the power grid. These applications tend to be complex, involve a large number of computers, and must face all sorts of failures ranging from power outages and software bugs to mali...

Gamelia bennetti sp. nov. is described from Trinidad, Trinidad and Tobago, West Indies, compared with members of the abas species group: G. (Cramer, [1775]), berliozi Lemaire, 1967, lichyi 1973, rubriluna (Walker, 1862) septentrionalis (Bouvier, 1936). A photographic record suggests may also occur in Tobago.