and Overview. In this paper we describe the motivation, design and implementation of a system to visually guide a locomoting robot towards a target and around obstacles. The work was inspired by a recent suggestion that walking humans rely on perceived egocentric direction rather than optic flow to guide locomotion to a target. We briefly summarise the human experimental work and then illustrat...

The impetus for our study was the contention of both Lynn [Lynn, R. (1991) Race differences in intelligence: A global perspective. Mankind Quarterly, 31, 255–296] and Rushton (Rushton [Rushton, J. P. (1995). Race, evolution and behavior: A life history perspective. New Brunswick, NJ: Transaction; Rushton, J. P. (1997). Race, intelligence, and the brain: The errors and omissions of the revised e...

Erratum to ‘‘The use of direction and distance information in the perception of trajectory” [Vision Res. 47 (7) (2007) 899–912] Simon K. Rushton *, Philip A. Duke a,c Centre for Vision Research and Department of Psychology, York University, 4700 Keele Street, North York, ON, Canada M3J 1P3 b School of Psychology, Cardiff University, Tower Building, Park Place, P.O. Box 901, Cardiff CF10 3YG, UK...

Computational fluid dynamics (CFD) is a powerful numerical tool that is becoming widely used to simulate many processes in the industry. In this work study of the stirred tank with 7 types of concave blade with CFD was presented. In the modeling of the impeller rotation, sliding mesh (SM) technique was used and RNG-k-ε model was selected for turbulence. Power consumption in various speeds in th...

Ruth Aylett, Centre for Virtual Environments, University of Salford, Salford, Greater Manchester, M5 4WT, UK. [email protected]. Gary Petley, Centre for Virtual Environments, University of Salford, Salford, Greater Manchester, M5 4WT, UK. [email protected]. Paul Chung, Chemical Engineering Department, Loughborough University, Loughborough, Leicestershire, LE11 3TU, ...

S u m a r y .-Rushton's (1 988) reinterpretatjon of recent research on brain weight one-sidedly emphasizes the findings of heavier brain weight in whites than in blacks and neglects to comment on a larger difference found between men and women. Rushton explicitly used brain size as indicator of intelligence. His implicit conclusion chat women are less intelligent than men is not supported by em...

The hydrodynamics of stirred tanks and bubble breakup are crucial in gas-liquid flows, yet this system has not been well characterized for different operating conditions. In work, the numerical method was used to investigate six- flat blades impeller (Rushton turbine) results were employed understand behavior tank. Simulation predicted flow pattern, power number, distribution turbulence energy ...

A fundamental question about locomotion in the presence of moving objects is whether movements are guided based upon perceived object motion in an observer-centered or world-centered reference frame. The former captures object motion relative to the moving observer and depends on both observer and object motion. The latter captures object motion relative to the stationary environment and is ind...

and male alopecia [1–4] . The prerequisite for delivering appropriate patient care is an understanding of the pathologic dynamics of hair loss and a potential multitude of causal relationships. Once the diagnosis is certain, treatment appropriate for that diagnosis is likely to control the problem. Ultimately, the best way to alleviate the emotional distress related to hair loss is to effective...

In a gas-liquid stirred reactor, gas tends to accumulate in low-pressure regions behind the impeller blades. Such gas accumulation forming so-called gas cavities, significantly alters impeller performance characteristics. We have computationally investigated gas-liquid flow generated by a Rushton turbine. Rotating Rushton turbine generates trailing vortices behind the blades, which enhance the ...