The extensive gypsum karst of Sivas, Turkey is one the most outstanding examples bare in world. It displays a number remarkable geomorphic features, including: (1) two stepped planation surfaces cut-across folded developed during an initial phase slow base level deepening punctuated by periods stability; (2) unusual deeply entrenched canyons related to subsequent rapid fluvial incision and wate...

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Wireless sensor networks (WSNs) consist of many small wireless sensor nodes which are capable of sensing data and sending it to base stations. WSNs face resource constraints including limitations on communication, power, memory capacity and computational power. Also, since they are frequently deployed in hostile environments and left unattended, they are vulnerable to several attacks such as si...

During a survey of the parasites of freshwater fishes from cenotes (sinkholes) of the Yucatan Peninsula the following species of monogeneans were found on cichlid, pimelodid, characid and poeciliid fishes: Sciadicleithrum mexicanum Kritsky, Vidal-Martinez et Rodriguez-Canul, 1994 from Cichlasoma urophthalmus (Günther) (type host), Cichlasoma friedrichsthali (Heckel), Cichlasoma octofasciatum (R...

Rosenfeld and Pindell (2002, 2003) hypothesized that the Gulf of Mexico evaporated to a level below the world ocean for a brief interval during the Paleocene-Eocene. Further study and the results of recent drilling support this idea and suggest that a major change in the interpretation of the Gulf’s history may be warranted. The idea originally arose to explain several major Paleocene-Eocene pa...