Abstract: An apparatus and method for measuring air currents on the surface of a substrate, which can accurately measure the magnitude and direction of air currents on the surface of a wafer with wafer-type air current measurement sensors, are provided. The apparatus includes: a first air current measurement module measuring a magnitude of air currents on a surface of a first substrate, which is processed in accordance with a semiconductor manufacturing process; a second air current measurement module measuring a movement direction of the air currents; and a power module supplying power to the first and second air current measurement modules, wherein the first air current measurement module, the second air current measurement module, and the power module are mounted on a second substrate, which has the same shape as the first substrate.

Abstract: A knee joint rehabilitation apparatus for a wheelchair includes a rehabilitation apparatus frame having a height corresponding to a length of each of legs of a patient sitting on the wheelchair; an upper leg support disposed at an upper end of the rehabilitation apparatus frame and supporting upper legs of the patient thereon while the patient is sitting on the wheelchair; a lower leg support pivotably connected to the upper leg support, wherein the lower legs of the patient are seated and supported on the lower leg support; and an exercise control unit disposed on the rehabilitation apparatus frame and configured to allow the lower leg support to pivot around a connection portion between the lower leg support and the upper leg support such that the patient performs rehabilitation exercise of the knee joint thereof while sitting on the wheelchair.

Abstract: Provided is a ceiling storage system capable of correcting a working position and constantly checking stability of a structure by detecting an amount of change in a facility. According to the ceiling storage system, a transport vehicle moves to an upper portion of a first storage area of a plurality of storage areas in a state of gripping an article, and the transport vehicle measures a first distance value between the transport vehicle and the first storage area using a distance sensor and measures a relative position value between the transport vehicle and the first storage area using a vision sensor, before unloading the article from the first storage area.

Abstract: The present invention discloses an access device for supporting a variable data layer including: a user access processing module unit for receiving and processing an input command of a user, providing externally-received voice data to the user, and processing access to a local area network; a central control processing module unit for processing the voice data processed in or inputted to the user access processing module unit, and controlling processing units of the respective modules; and a wide area network access processing module unit for receiving data from the central control processing module unit, and performing a matching operation for a physical layer access. As a result, the access device supports the variable data layer, minimizes hardware variations due to variations of a physical layer access medium, and utilizes system hardware according to environmental variations of the physical access unit.

Abstract: The present invention relates in general to an interface module of an asynchronous transfer mode(ATM) terminal using the ATM for transmitting information, particularly to an ATM interface module having an interfacing function required to ATM communication terminals which supports other services and capable of interfacing with the other upper layer service modules by changing an interface module software according to a respective service type.

Abstract: The WAN access system has: a user connection process module section for converting analog signals to digital signals so as to process information in a switching system and processing a corresponding request of a user; a WAN connection process module section for selecting TDM buses so as to enable a line switching of a packet switching and extracting data to be transferred to an AAL1-processing/UTOPIA-multiplexing section; and a central control process module section for controlling the WAN access system, the central control process module section being connected to the user connection process module section and the WAN connection process module section to perform switching between the TDM buses, so as to enable the line switching and the packet switching, the central control process module section performing an AAL5 SAR processing and an SAAL processing, and an AAL1 processing and a UTOPIA bus multiplexing.

Abstract: An Internet telephony gateway system includes a main controlling device that prepares a packet comprising compressed voice data and transmits the packet to the communication network, or extracts compressed voice data from the packet received from the communication network and transmits the extracted data to at least one specific function board in response to a signal form of the extracted data. The system also includes at least one specific function device connected to the main controlling device for processing one of analog signal protocol and digital signal protocol. The extracted data is provided to a digital specific function device to communicate with a communication device capable of processing digital data, and the extracted data is provided to an analog specific function device to communicate with a communication device capable of processing analog data.

Abstract: The present invention discloses an access device for supporting a variable data layer including: a user access processing module unit for receiving and processing an input command of a user, providing externally-received voice data to the user, and processing access to a local area network; a central control processing module unit for processing the voice data processed in or inputted to the user access processing module unit, and controlling processing units of the respective modules; and a wide area network access processing module unit for receiving data from the central control processing module unit, and performing a matching operation for a physical layer access. As a result, the access device supports the variable data layer, minimizes hardware variations due to variations of a physical layer access medium, and utilizes system hardware according to environmental variations of the physical access unit.