We are currently facing a “labor crisis,” particularly in the field of logistics, because of reductions in the labor force. Therefore, industries must make their logistics more efficient by utilizing autonomous mobile robotics technologies. This paper proposes a hierarchized map concept that makes unmanned delivery tasks which use multiple autonomous robots more efficiently. Using our proposed concept, an autonomous mobile robot can move automatically on a more efficient path than using current methods. In addition, the management platform for autonomous robots can be used to prevent accidents such as collisions or deadlocks between autonomous robots.

NiCuZn ferrite(Ba 0.7 Sr 0.3 )TiO 3 (BST) composite ceramics with the BST content of up to 50 vol % were fabricated by sintering compacted powder mixtures at 900°C. The granulation of the BST powder and addition of a Bi 2 O 3 -based oxide additive effectively assisted the densification of the composite samples. The samples thus fabricated showed required ¾ r values whereas their ® r values were considerably reduced, especially for those with lower BST contents. From the detailed examinations on the effect of the Bi 2 O 3 -based oxide additives and on the process modification to improve the reduced ® r values, the addition of a Bi 2 O 3 ZnO additive with the eutectic composition of as low as 1 wt % was enough to produce a densified 10 vol % BST composite sample with a highest ® r value. It was also found that the incorporation of ferrite granules calcined at 600°C caused further improvement of ® r . Thus, a densified 10BST composite sample with ® r = 125 was fabricated by low-temperature sintering at 900°C.

A dewetting process of an evaporating solution is used to form micrometer-sized amorphous droplets, or domes, of the solute on substrates such as silicon, mica, glass, and indium-tin-oxide. The dome size can becontrolled by the casting conditions. Higher concentration and slower evaporation of the solvent leads to larger domes. Upon annealing, the dyes may crystallize and form polycrystalline or single crystalline domes or crystalline fibers. Photophysical properties of the domes were investigated and it was found that the absorption and fluorescence spectra depend on the aggregate kind (polycrystalline or single crystalline) and the dome size.

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