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The retractable hardtop system is an ultimate roof system that offers both convertible and coupe-style modes. Passengers can enjoy open-air driving with the convertible mode, and a comfortable and quiet cabin space with the coupe-style mode. Aisin Seiki developed the retractable hardtop system for the LEXUS SC430 in 2001. We developed the three-piece retractable hardtop system[1], which was further improved with the LEXUS IS250C for the global market. This paper introduces the structure of the roof system.

The metal top is used for convertible cars since the exterior design when the rooftop is closed is also important. A retractable metal top system which can automatically retract and extract the metal top has been popular to increase commercial values for the luxury convertible cars. We have developed the metal top open-close system comprising metal top,package tray and luggage panel operation link-mechanism units driven by electric motors. The metal top can be retracted or extracted in approximately 25 seconds by controlling the metal top system and the side and quarter window motors. The roof panel is pre-load so that the cabin air-tightness for high speed driving is maintained. The metal top is compactly retracted since the slide and side package trays are synchronized. Enough luggage space is secured using the multi-link mechanism to open and close the luggage panel. This retractable metal top system is equipped with the LEXUS SC430. (Fig.1) [1]

This waste management process must be capable of treating the various wastes generated within Controlled Ecology Experiment Facilities (CEEF) and operate effectively in and environment in which carbon, oxygen, nitrogen, salts, and other important minerals, exit. The catalytic Wet Oxidation Process (W/O Process) is regarded to be the most feasible candidate process for such waste management. This paper clarifies the performance data and the design data of the actual device. By applying these comparison data, for example, water balance, insoluble part balance, organic part balance, and inorganic balance for CEEF, we were also able to confirm the usefulness and applicability of the actual Wet Oxidation Device.

Compared with other applicable processes such as incineration, the catalytic wet oxidation process is considered to be the most practically applicable waste treatment process for the CELSS. In this report, the quantity of carbon monoxide generated in the wet oxidation process is identified and a measure for carbon monoxide minimization is discussed. As a result of a bench test, it became apparent that a non-negligible quantity of carbon monoxide could be generated in the catalytic wet oxidation process. However, it can be expected that this CO content will be reduced to a safe level by applying the wet oxidation process catalyst reactor to CO oxidation.

The catalytic Wet-Oxidation process is the most feasible candidate for the waste management process of CELSS in comparison with other applicable technologies such as dry incineration, vapor compression distillation, etc. In this report we try and discuss the design of a Wet-Oxidation Waste Management Process which supports 1 person's life in a closed system. The proposed Wet-Oxidation Waste Management process treats the waste by a two-step reaction. Planned capacity is approximately 2.5kg- dry/day. A design concept, schematic flow and basic configuration of Wet-Oxidation apparatus are considered and discussed in this paper.