We study a call center model with a postponed callback option. A customer at the head of the queuewhose elapsedwaiting time achieves a given threshold receives a voice message mentioning the option to be called back later. This callback option differs from the traditional ones found in the literature where the callback offer is given at customer’s arrival.We approximate this system by a two-dim...

STOCK DEFINITION AND GEOGRAPHIC RANGE The coastal morphotype of bottlenose dolphin is continuously distributed along the Atlantic coast south of Long Island, New York, to the Florida peninsula, including inshore waters of the bays, sounds and estuaries. Except for animals residing within the Southern North Carolina and Northern North Carolina Estuarine Systems (e.g., Waring et al. 2007), estuar...

background: many members of the genus satureja l. (lamiaceae) have interesting pharmacological and biological properties. objective: in this research, major essential oil (eo) compositions, rosmarinic acid (ra) content, and antioxidant and antibacterial properties of the leaf extracts of nine satureja species (s. bachtiarica, s. mutica, s. sahandica, s. macrantha, s. atropatana, s. edmondi, s. ...

Trypanosoma cruzi, a hemoflagellate protozoan (family Trypanosomatidae), is the ethiological agent of Chagas disease, which is affecting 16-18 million people, with more than 100 million exposed to the risk of infection. Higher plants are a potential source of new drugs to improve the treatment of Chagase disease. Until recently, Rutacea, Meliaceae, Simaroubaceae and Burceraceae families have be...

Trypanosoma cruzi, a hemoflagellate protozoan (family Trypanosomatidae), is the ethiological agent of Chagas disease, which is affecting 16-18 million people, with more than 100 million exposed to the risk of infection. Higher plants are a potential source of new drugs to improve the treatment of Chagase disease. Until recently, Rutacea, Meliaceae, Simaroubaceae and Burceraceae families have be...

The rangeland in the Khangai mountain region in Mongolia has degraded for the last decades mainly because of overgrazing and climate change. Livestock production is important part of the economy and is based on natural rangeland. In this research we seek to elucidate the influence of five years (2004-2009) of protection from grazing on vegetation cover of different degradation levels of Fes...