Determination of roughness coefficient in 3D digital representations of rocks.

The roughness property of rocks is significant in engineering studies due to their mechanical and hydraulic performance and the possibility of quantifying flow velocity and predicting the performance of wells and rock mass structures. However, the study of roughness in rocks is usually carried out through 2D linear measurements (through mechanical profilometer equipment), obtaining a coefficient that may not represent the entire rock surface. Thus, based on the hypothesis that it is possible to quantify the roughness coefficient in rock plugs reconstructed three-dimensionally by the computer vision technique, this research aims to an alternative method to determine the roughness coefficient in rock plugs.

First Report of Looss 1899 (Digenea: Pronocephalidae) in a Hawksbill Turtle - . Found in Brazilian Coast.

Looss 1899 (Digenea: Pronocephalidae) is a parasite exclusive to sea turtles, having been described in the green turtle () in Egypt, the USA, Panama, Costa Rica and Brazil as well as the olive ridley turtle () in Brazil. The present note describes the first occurrence of in a hawksbill turtle () found on the coast of Brazil.

The Genus Price, 1939 (Digenea: Rhytidodidae) in Brazil: New Geographic Occurrence and Report of Pathology in the Gallbladder.

The present note describes the occurrence of and (Digenea: Rhytidodidae) in the gallbladder of two juvenile green turtles ( - Testudines, Cheloniidae) found on the coast of Brazil. Both were detected in gallbladder and intestine of green turtles: (United States, Panama, Costa Rica and Brazil) and (United States, Panama and Costa Rica). This note is the first report of in Brazil and South-West Atlantic Ocean.

Chronic Cystitis Associated with Plesiochorus cymbiformis ( Rudolphi, 1819 ) Looss, 1901 (Digenea: Gorgoderidae) in a Loggerhead Turtle Caretta caretta (Linnaeus 1758) (Testudines, Cheloniidae) from Brazil: A Case Report.

This paper reports the first occurrence of Plesiochorus cymbiformis (Digenea: Gorgoderidae) in a loggerhead turtle ( Caretta caretta [Testudines, Cheloniidae]) in Brazil and describes the histological findings of related injuries to the urinary bladder.