Spin and roll: convex solids of revolution as playful interface
We present an interactive system that uses convex solids of revolution as playful interface manipulated on tabletop display. Interaction is based on the unique movements of the solids such as rolls and spins in addition to usual pointing and dragging. Touching of the solids on the display is detected by a sensor-sheet and used for applications. We developed some contents such as a draw tool and gaming applications that make full use of the solids.
Stick and roll: a physical interactive system using curved displays and rolling batons
We present a physical interactive system in which a player manipulates batons as interface on curved displays. Touching of batons on the displays are detected by sensor-sheets based on electro-magnetic induction. To show the feasibility and effectiveness of the system, we developed digital picture book contents in which a player uses batons in various ways such as rolling, pointing, and sweeping to interact with the sceneries.
Coated-wire electrodes containing polymer immobilized ionophores blended with poly(vinyl chloride).
Polymers containing covalently attached 18-crown-6 or 2.2.2 cryptand units were incorporated into plasticized PVC membranes and the composite membranes were examined as potassium ion sensor elements. Ionophores were linked to carboxy-PVC and to poly(acrylic acid) via amide linkages to an alkyl spacer unit. Coated-wire electrodes (CWEs) from the immobilized ionophores gave acceptable responses, but conventional ion-selective membrane electrodes (ISEs) prepared by solvent casting were inactive. Dip-cast membranes did give active ISEs. Potassium electrode performance was independent of the loading of the ionophore within the acrylate support polymer, but depended upon the spacer length. Ion selectivity varied with the ionophore loading within the support polymer. Selectivity is a composite of the ionophore selectivity and ion-exchange interactions with the acrylate backbone, giving selectivities akin to carboxylate substituted crown ethers, notably enhanced monovalent/divalent ion discrimination relative to the ionophore in solution. Polymer immobilization extended the lifetime of active electrodes.