Designing interactive consumer products: utility of paper prototypes and effectiveness of enhanced control labelling.

The studies reported here examined differences in user behaviour when presented with a low-fidelity paper prototype compared to fully operational product, and evaluated the effectiveness of different types of enhanced labelling of controls. In the first study with a paper prototype, 30 users of high-pressure washers were asked to choose the settings of the temperature control for different cleaning objects, comparing standard with information-enriched control labelling. In the second study, 34 users operated a real high-pressure washer with different forms of control labelling.

Cognitive diversity and team performance in a complex multiple task environment.

This article examines the multiple effects of cognitive diversity in teams operating complex human-machine-systems. The study employed a PC-based multiple-task environment, called the Cabin Air Management System, which models a process control task in the operational context of a spacecraft's life support system. Two types of cognitive diversity were examined: system understanding and team specialization.

Syntheses, crystal structures, and density functional theory calculations of the closo-[1-M(CO)(3)(eta(4)-E(9))](4-) (E = Sn, Pb; M = Mo, W) cluster anions and solution NMR spectroscopic characterization of [1-M(CO)(3)(eta(4)-Sn(9))](4-) (M = Cr, Mo, W).

The closo-[1-M(CO)(3)(eta(4)-E(9))](4-) (E = Sn, Pb; M = Mo, W) anions have been obtained by extracting the binary alloys KSn(2.05) and KPb(2.26) in ethylenediamine (en) in the presence of 2,2,2-crypt or in liquid NH(3) followed by reaction with M(CO)(3).