This paper describes the development of airconditioned seats for outdoor stadiums and reports their performance results. After considering the best location for the installation of the air supply port, the air outlet was mounted on the cup holder. Because of its concentric circular form, the outlet located in the cup holder is able to blow air upward to the occupied zone. An experimental cooling performance evaluation was conducted, which compared the proposed cup holder nozzle with standard, riser-mounted, stadium air conditioning systems.

We have discovered new rare-earth intermetallic compounds Dy 4 Pd 9 Ga 24 and Er 4 Pd 9 Ga 24. These materials crystallize in a monoclinic Yb 4 Ga 24 Pt 9-type crystal structure (space group: C2/m). This crystal structure is a laminated structure, and rare earth ions form a honeycomb structure on the ab-plane. We have measured the specific heat and magnetization of these compounds. Dy 4 Pd 9 Ga 24 exhibits antiferromagnetic ordering at 12 K, and multiple plateaus are observed in the magnetization curve for a magnetic field in the ab-plane. Er 4 Pd 9 Ga 24 antiferromagnetically orders at 5.4 K, and a metamagnetic transition occurs when a magnetic field is applied along the magnetization easy c axis.