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Collaborative tagging systems are an example of socially-aware, self-organising, complex systems. The multi-agent systems paradigm coordinated by self-organisation mechanisms has been used as an effective way for the design and modeling of such systems. Existing tagging systems do not take full advantage of their complex systems characteristics, especially in adapting to their environment and allowing...
The Web continues to grow at a phenomenal rate and the amount of information on the Web is overwhelming. Finding the relevant information remains a big challenge. Due to its wide distribution, its openness and high dynamics, the WWW is a complex system, for which we have to imagine mechanisms of content maintaining, filtering and organizing that are able to deal with its evolving, dynamics and distribution...
The crystal structure of Na[Co(NC 6 H 6 O 6 )]·H 2 O is reported. The structure is compared to similar transition-metal nitrilotriacetate complexes containing different alkali cations and transition metals (Cu 2+ and Zn 2+ ). Inner-sphere coordination of the metals is similar, but the arrangement of counter-ions and water molecules in the unit cells...
. The two stigma lobes of bush monkeyflower (Mimulusaurantiacus) close together rapidly in response to touch by a hummingbird pollinator and usually remain closed for the life of the flower, preventing further pollen receipt. Previous work showed that hummingbirds visiting bush monkeyflowers with closed stigmas export more than twice as much pollen to recipient flowers as birds visiting flowers with...
A great deal of laboratory research has demonstrated that women underestimate their intellect and abilities, and we studied whether this tendency manifested itself outside the laboratory by examining the performance of men and women on the television game show “Jeopardy”. Information about the masculinity and femininity of the topic categories for 65 games was collected, and selections, answers,wagering...
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