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Recommender systems can be used to assist groups of users to select services in Internet of Things (IoT)-enriched environments. However, aggregating the preferences of the individual users of a group, which is generally used in group recommendation, is not appropriate for IoT environments, where the user groups' preferences for IoT-based services differ… (More)
Multi-walled carbon nanotubes (MWNTs) have been amine-functionalized by eco-friendly supercritical water oxidation. The facilely functionalized MWNTs have high solubility (~84 mg L(-1)) in water and 78% transmittance at 30-fold dilution. The Tyndall effect is also shown for several liquids.