Abstract: The affective state called flow is described as a state of optimal experience, total immersion, and high productivity. As an important metric for various scenarios ranging from (professional) sports to work environments and user experience evaluation, it is widely studied using traditional questionnaires. To make flow measurement accessible for online real-time environments, to automatically determine a user's flow state based on physiological signals measured with a wearable device, a system and method is presented to play the game Tetris® at different difficulty levels, resulting in boredom, stress, and flow. A CNN is used to achieve 70% accuracy in detecting flow-inducing values.

Abstract: Methods for precise and predictable modification of previously synthesized nanocrystals. The methods rely on the solubility behavior of crystalline materials to provide for controlled reversal of the nanocrystal growth process (i.e., dissolution). A method for post-synthesis modification of colloidal nanocrystals includes (1) providing a first nanocrystal having a first size and a first shape, (2) forming a reaction mixture that includes the nanocrystal, at least one ligand capable of binding to at least one component of the nanocrystal, at least one solvent, and an inert gas atmosphere, and (3) modifying the size and/or shape of the nanocrystal in the reaction mixture for a period of time at a temperature in a range from about 100° C. to about 240° C. so as to produce at least a second nanocrystal having a second size and/or a second shape.

Abstract: Methods for precise and predictable modification of previously synthesized nanocrystals. The methods rely on the solubility behavior of crystalline materials to provide for controlled reversal of the nanocrystal growth process (i.e., dissolution). A method for post-synthesis modification of colloidal nanocrystals includes (1) providing a first nanocrystal having a first size and a first shape, (2) forming a reaction mixture that includes the nanocrystal, at least one ligand capable of binding to at least one component of the nanocrystal, at least one solvent, and an inert gas atmosphere, and (3) modifying the size and/or shape of the nanocrystal in the reaction mixture for a period of time at a temperature in a range from about 100 0C to about 240 0C so as to produce at least a second nanocrystal having a second size and/or a second shape.