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.
ROOM- AND HIGH-TEMPERATURE MAGNETIC PROPERTIES OF Sm(CobalFexCu0.088Zr0.025)7.5 (x=0.30) SINTERED MAGNETS
The effect of Fe content on room- and high-temperature magnetic properties of Sm(CobalFexCu0.088Zr0.025)7.5 (x=0-0.30) sintered magnets, prepared by the conventional powder metallurgy method, has been systematically studied. With increasing Fe content, the remanences BT and maximum energy products (BH)max at room temperature gradually increase and reach optimal values of 1.055 T with x=0.27 for BT, and 205 kJ/m3 with x=0.21 for (BH)max, respectively, and then drop sharply with further Fe increase. An excessive addition of Fe (x≥0.24) results in rapid deterioration of permanent magnetic properties due to the formation of a considerable amount of FeCo soft magnetic phase. It was found that the effect of Fe content on high temperature stability is huge. The lower the Fe content, the smaller the temperature coefficient of coercivity. When x=0.07, a temperature coefficient of coercivity of -0.14%/K (293-723 K) can be achieved, as compared with -0.23%/K for x=0.21. BT of 0.725 T, bHc of 517 kA/m, iHc of 764 kA/m, and (BH)max of 95 kJ/m3 at 723 K were obtained, and the B-H demagnetization curve remains a straight line.