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We test the hypothesis that the spread in the age-metallicity plot of the solar neighborhood is due to a mixture of stars belonging to kinematically different sub-populations of the Galactic disk, i.e., the thin and the thick disk. We use a kinematic subsample of similar to 600 stars from a sample of similar to 6000 dwarf and subgiant stars from the Hipparcos catalog. All of these stars have a ful
Following a brief discussion on aspects of visual appearance and roles respectively, two user studies are presented and discussed. Both focus on learner experiences and explore the reciprocal relation between visual appearance of virtual agents and their pedagogical roles. The paper concludes with some preliminary guidelines for the early stages of the design process of virtual pedagogical agents.
This paper illustrates a novel method to analyze artificial neural networks so as to gain insight into their internal functionality. To this purpose, the elements of a feedforward-backpropagation neural network, that has been trained to detect edges in images, are described in terms of differential operators of various orders and with various angles of operation.
This paper describes the modification of a wavelet based event detector for cardiac pacemakers with improved power efficiency. A previously published R-wave detector has been supplemented with a noise detector that operates in supervision mode, and automatically activates and deactivates parts of the detector. Simulation results show that the power consumption in an ASIC core can be reduced by mor
Indium arsenide nanowires are grown directly on silicon substrates (see figure and cover) using a method employing self-assembled organic coatings to create oxide-based growth templates. High-performance materials, such as InAs, could have great impact on future nanoelectronics if integrated with Si, but integration has so far been hard to realize with other methods.
The production of methane via anaerobic digestion of agricultural residues and industrial wastewater would benefit society by providing a clean fuel from renewable feedstocks. This would reduce the use of fossil-fuel-derived energy and reduce environmental impact, including global warming and pollution. Limitation of carbon dioxide and other emissions through emission regulations, carbon taxes, an
After the storm. A sociological analysis of families owning forest properties. A Book By Sellerberg publiched by Bokbox, March 2011 "Has it been windy?", someone asks a forest owner in March 2005. In January practically all of his forest was annihilated. A storm rolled by with winds as strong as 46 metres per second. The forest owners in Kronoberg county were particularly badly hit by the disaste
To be successful in Information Systems (IS) outsourcing the necessity of better management practices has been pointed out.This research contributes to the knowledge base on management of IS outsourcing by addressing management of ISoutsourcing relationships. The research describes two cases of IS outsourcing relationships that differ in type of activityoutsourced, IS development versus IS mainten
