in April 2000. His research interests include the management of social interaction in CMC systems, the links between CMC research and design, and the processes of interpersonal networking. Reader in the Department of English at The University of Queensland. She is the author of The Language of Negotiation and the Handbook of Persuasive Tactics. Her research interests include textual practices i...

This paper provides new insights into the problem of selecting filter center frequencies for the auditory filterbanks. We propose to use a constant frequency distance and a consistent frequency coverage as the two metrics that motivate the logarithmic frequency scaling and a regularized selection of center frequencies. The frequency scaling and the consistent frequency coverage have been derive...

All individuals of Cedrela lilloi (a valuable timber species of Meliaceae) > 4 cm DBH were sampled in three rectangular plots (c. 15 000 m each) in northwestern Argentina subtropical montane forests between 850 and 1350 m. Regeneration dynamics of C. lilloi was characterized by testing two hypotheses: (i) C. lilloi has a gap-phase regeneration mode, which implies a negative exponential size/age...

A positive surge is a unsteady open channel flow resulting from the rapid rise of the free-surface. The phenomenon may be observed in water supply canals and channels as well as in some estuaries during spring tidal conditions. The formation and development of positive surges can be predicted using the method of characteristics and shallow water equations. The paper is the second part of a stud...

A butterfly web girder is a box that has discretely distributed side-surface openings. Due to these openings, girders show better aerodynamic performance than conventional girders. This study aims investigate the effects of openings on instability when it placed in tandem with another girder. In addition, this whether one affected by an adjacent series wind tunnel tests will be carried out and ...

A computationally ecient algorithm for computing erosions and dilations by onedimensional grayscale structuring elements with constant slope is proposed. The computational complexity of this algorithm is independent of the size of the support of the structuring function. This is a generalization of the method proposed by Van Herk for the case of erosion and dilation by ̄at one-dimensional struc...

The article presents a calculation of the aeration multi-span greenhouse in cold period year with openings areas taken warm year. To achieve normalized flow rates supply and exhaust air, values which are different sources, calculations were performed at opening angles openings.

Besides safe motion control the gain of environmental knowledge is a key for a reliable home or office service robot. When being set into a completely unknown environment the robot has to be able to derive a certain abstract internal representation of this world without any user interaction. This knowledge enables the robot to know how to get from its actual place in one room to a target positi...

Free-convection flow through a two-dimensional rectangular box having openings at opposite corners on the vertical walls is investigated numerically, using a commercial Computational Fluid Dynamics (CFD) software package. Convection is induced when the box's ceiling or its floor is imposed with a temperature that is different to that of the ambient fluid, while all other walls are insulated. Th...