Abstract: The present invention relates to an upright vacuum cleaner. The upright vacuum cleaner according to the present invention comprises a main body for housing a suction power generating means for sucking air and a filtering means for filtering out foreign substances contained in the sucked air; a suction nozzle pivotably connected to a lower portion of the main body for sucking the air containing the foreign substances and then guiding the sucked air into the main body; a handle installed at the top of the main body and gripped by a user in use; and a potential meter installed at one side surface of the handle and capable of controlling a suction power level and on/off operations of the vacuum cleaner by means of a sliding manipulation. Further, the potential meter is preferably installed at a front surface of the handle.

Abstract: The present invention relates to a ROM division method for reducing the size of a ROM in a direct digital frequency synthesizer (DDFS), which is used to synthesize a frequency in a communication system requiring fast frequency conversion. A ROM consuming most energy in the system, a modified Nicholas architecture is brought forth to reduce the size of ROM. In this modified Nicholas architecture, a ROM is divided into coarse ROM and fine ROM to convert phase to sine value. The present invention divides the coarse ROM and the fine ROM into quantized ROM and error ROM respectively. Then, value stored in each ROM is segmented in certain intervals and the minimum quantized value in each of the section is stored in the quantized ROM, while the difference between the original ROM value and the quantized ROM value is stored in the error ROM. This way, the size of a ROM can be reduced. Phase value inputted in a DDFS, a sine value is calculated by adding the four ROM values, i.e.

Abstract: A computer system has a display device for displaying system state information, so that advanced configuration and power interface specification (ACPI) state information and power state information are displayed. Thus, a user can easily confirm the current state of a computer system and a usable duration of a portable computer.

Abstract: The present invention relates to a ROM division method for reducing the size of a ROM in a direct digital frequency synthesizer (DDFS), which is used to synthesize a frequency in a communication system requiring fast frequency conversion. A ROM consuming most energy in the system, a modified Nicholas architecture is brought forth to reduce the size of ROM. In this modified Nicholas architecture, a ROM is divided into coarse ROM and fine ROM to convert phase to sine value. The present invention divides the coarse ROM and the fine ROM into quantized ROM and error ROM respectively. Then, value stored in each ROM is segmented in certain intervals and the minimum quantized value in each of the section is stored in the quantized ROM, while the difference between the original ROM value and the quantized ROM value is stored in the error ROM. This way, the size of a ROM can be reduced. Phase value inputted in a DDFS, a sine value is calculated by adding the four ROM values, i.e.

Abstract: A video conference system used in home automation for performing audio and video conferencing between a personal computer and a video phone as well as remote conference system. The personal computer stores audio/video information of the visitor supplied from the video phone and automatically connects with the remote conference system in response to a bell signal input of the visitor. A subsystem is installed in the video phone for supplying audio/video data of the visitor to a main control system for receiving audio/video information transmitted from the remote conference system over a communication network.

Abstract: A method for controlling an operation and management subsystem in a signalling message exchange No.1 system, the operation and management subsystem including a user interface subsystem, a target interface subsystem, an operation control subsystem, a signalling network operation system interworking subsystem, an operation and management subsystem management subsystem and a data management subsystem.

Abstract: A writing instrument with a slide cap is provided in which the slide cap with a moveable cover is slideable along casing of the instrument from a position wherein it protects the writing tip of the instrument, to a position wherein the writing tip is exposed.

Abstract: A luggage carrier is provided which allows the wheel assemblies to automatically retract to a coplanar inoperative position when the base support member is lifted up, thus reducing the luggage carrier into a narrower area when placed in storage.

Abstract: An apparatus for removing animal feces is provided that will conveniently collect and enclose feces into a receptacle wherein an improved scraping device is provided which opens outward of the receptacle in response to squeezing a trigger handle and which automatically in a scraping motion moves and encloses feces in the receptacle. In a modified form cleaning fluid is provided for flushing the apparatus.

Abstract: A shoe case for storing a pair of shoes is provided and includes a built-in unit for dehumidifying the pair of shoes. The unit can also deodorize the pair of shoes.