Mechanical site preparation is frequently proposed to alleviate problematic soil conditions when afforesting retired agricultural fields. Without management of soil problems, any seedlings planted in these areas may exhibit poor growth and survival. While mechanical site preparation methods currently employed in hardwood afforestation are proven, there is a substantial void in research comparin...

WASHINGTON, D.C.-Highlighting the third annual conference of the National Organization of the Reform of M arijuana Laws (NORML held here last weekend), NORML Director Keith Stroup said that existing m arijuana laws are detrim ental to both society and the individual. “ Last year in this country m ore than 420,000 persons were arrested for m arijuana offenses,” Stroup said. “The law enforcement ...

Many birds do not breed until they are 2 or more years old. Such delayed breeding is generally found among large, long-lived, non-passerine species. Lack (1954) suggested that delayed breeding has probably evolved in species in which reproduction at an earlier age would not be likely to succeed or might be harmful to the parents. Ashmole (1963) and Amadon (1964) suggested that young birds might...

We study the numerical performance of a limited memory quasi-Newton method for large scale optimization, which we call the L-BFGS method. We compare its performance with that of the method developed by Buckley and LeNir (1985), which combines cyles of BFGS steps and conjugate direction steps. Our numerical tests indicate that the L-BFGS method is faster than the method of Buckley and LeNir, and...

Professor Frank Harary has had a singular influence on graph theory through his own extensive original research, through the training of several researchers who themselves have made many important contributions, and through popularizing work, most significantly his text Graph Theory [1]. Frank Harary has contributed to a number of more advanced specialized texts, like that of Buckley and Harary...

Climate change is affecting the tourism industry through many different mechanisms (Weaver 2011;Gössling, 2002, 2007; Berrittella et al. 2005; Hall and Higham 2005; Peeters 2005; Dubois and Ceron 2006; Becken and Hay 2007; Buckley 2008; UNWTO-UNEP-WMO 2008;Gössling et al. 2009). These include: environmental changes and human responses at tourist destinations and countries of origin (Koenig and ...

Conomyrma Forcl and all its species were considered to belong in Dorjrm?mex Santschi, until Kusnezov (1952) separated the two genera, Dorymyrmex and Conotnyrtna. He further divided Conomyrrna into two subgenera, Biconomyrma Kusnezov and Conotnyrnta. Although these subgenera subsequently were elevated to generic status by Kusnezov (1 959), Biconot?lyrtna was later synonymized with Conotnyrrna by...