Abstract: A power control system of a rack heat-dissipation system, which receives output voltages of a rack power supply and a module power supply, includes a first control module and a second control module operating in parallel. The first control module includes a first switching unit, a first voltage converting unit and a first monitoring unit. The second control module includes a second switching unit, a second voltage converting unit and a second monitoring unit. The first monitoring unit is connected to the rack power supply, the module power supply, the first switching unit and the first voltage converting unit, and the second monitoring unit is connected to the rack power supply, the module power supply, the second switching unit and the second voltage converting unit. The heat dissipation system can be kept in the normal operation even if one of the control modules is failed.

Abstract: An electronic device includes a base, a multi-stage sensor, a top cover, and a side cover. The multi-stage sensor is configured to sense a sensed area. The top cover includes a top-sensed element, and the top cover is detachably connected to a top side of the base, so that the top-sensed element can be selectively in or not in the sensed area. The side cover includes a side-sensed element, and the side cover is detachably adjacent to a front side of the base, so that the side-sensed element can be selectively in or not in the sensed area. In response to that only the top-sensed element is in the sensed area, the multi-stage sensor outputs a first signal. In response to that neither the top-sensed element nor the side-sensed element is in the sensed area, the multi-stage sensor outputs a second signal.

Abstract: An exercise chair has a base, a top member and an at least one middle pad disposed between the base and the top member. The base has an assembling face and a curved face. The assembling face has a plurality of the assembly rods. The top member has an engaging face and a seating face, and the engaging face has a plurality of the engaging apertures. The at least one middle pad has a plurality of the engaging indentations on the lower surface, and the upper surface is formed with a plurality of the engaging protrusions. Therefore, by combining the exercise chair together, the number of stacks of the middle pad can be adjusted according to the movement form or the height of the user, so that the users can assemble structure by themselves.

Abstract: The present invention relates to a smart brake warning system, wherein the system is installed on a vehicle body either directly or using a base. The system comprises at least a warning light device, which is used to emit different modes or degrees of light to serve as a warning for vehicles approaching from the rear, and at least one inertia detection device, which is used to detect the inertia of the vehicle at that instance, and control the warning light device to emit different degrees of light mode according to the size of the inertia force. Even if the vehicle driver does not step on the vehicle brake, the present invention is still able to produce a warning signal to vehicle drivers approaching from the rear, achieving a forced warning effect that prevents accidental rear-end collisions.

Abstract: The present invention relates to a smart brake warning system, wherein the system is installed on a vehicle body either directly or using a base. The system comprises at least a warning light device, which is used to emit different modes or degrees of light to serve as a warning for vehicles approaching from the rear, and at least one inertia detection device, which is used to detect the inertia of the vehicle at that instance, and control the warning light device to emit different degrees of light mode according to the size of the inertia force. Even if the vehicle driver does not step on the vehicle brake, the present invention is still able to produce a warning signal to vehicle drivers approaching from the rear, achieving a forced warning effect that prevents accidental rear-end collisions.

Abstract: The present invention discloses a multimedia bookmark method and a system thereof. The method of the present invention comprises steps: providing a plurality of digital annotations for an information object; creating a bookmark containing an ordered set organized according to a time relativity, a file relativity or a user-defined attribute of the digital annotations; and presenting the bookmark and the information object corresponding to the bookmark. Thereby, the present invention provides complete, meaningful and multi-aspect bookmarks, enabling users to easily understand and conveniently use the annotations.