Communal roosting has been studied most extensively in birds and bats, but the behavior is taxonomically widespread (e.g., Reynierse et al. 1969; Cook et al. 1976; Pearson & Anderson 1985; Mallet 1986; Cockerill 1988; Miller 1989; Alcock 1998; Pimenta & Martins 1999; Gomes-Filho 2000; Grether & Switzer 2000). The location of communal roosts often appears to be traditional in that the same sites...

The presence of wall strengtheners in double-stage electrostatic precipitators affects gas velocity, electrical field and particle movement over the ESP. In this work we have used our previous mathematical model for double-stage ESP {Talaie et. al (2001) [10]] to study the effect of wall strengtheners on the performance of double-stage ESP. One of the important findings was that, due to the fac...

Graz University of Technology, Institute of Environmental Biotechnology, Petersgasse 12, A6 8010 Graz, Austria; Julius Kühn-Institut (JKI), Messeweg 11, D-38104 Braunschweig, 7 Germany, Kawanda Agricultural Research Institute, National Banana Research Program, 8 Uganda; Makerere University, Department of Agricultural Production, College of 9 Agricultural and Environmental Sciences, Uganda and B...

It has been widely recognized that spatial data analysis capabilities have not kept up with the need for analyzing the increasingly large volumes of geographic data of various themes that are currently being collected and archived (Openshaw 1991; Miller and Han 2001; Shekhar, Vatsaval et al. 2002; Guo 2003; Guo, Peuquet et al. 2003; Muntz, Barclay et al. 2003). On one hand, such a wealth of dat...

phase inversion in liquid-liquid dispersions corresponds to the transitional boundary between oil-in-aqueous dispersion and aqueous-in-oil dispersion. a theoretical model based on simple assumptions was proposed to predict phase inversion point, ambivalence region and the hysteresis effect of inversion. experimental data from the literature were used to validate the model and results were compa...