Abstract: The embodiments relate to an electrochromic device having excellent elongation and tensile strength while achieving an excellent light transmission variable function based on the electrochromic principle. The electrochromic device comprises a light transmission variable structure interposed between a first base layer and a second base layer, wherein the light transmission variable structure comprises a first chromic layer and a second chromic layer, an electrolyte layer is interposed between the first chromic layer and the second chromic layer, and the elongation is 60% to 170%.

Abstract: An apparatus and method for controlling data flow in a communication system are provided. In such an apparatus and method, a switch identifies a source address of a data frame received through each of a plurality of input ports, determines the size of the data frame received from the source address, creates a first pause frame to be transmitted to at least one source address selected based on consideration of the size of data frames received from respective source addresses for a period of time when the size of data frames stored in an output buffer of an output port exceeds a first threshold, and transmits the created first pause frame to the selected source address. The first pause frame is adapted to interrupt transmission of data frames of low importance.

Abstract: A rack for a communication system as, including a backboard having a first side, a second side, a connector capable of being connected to an electrical communication cable, and a plurality of through apertures. A first side panel has an open slot and a closed slot. The first side panel is connected to the first side of the backboard while a second side panel having a grooved slot is connected to the second side of the backboard. A rear panel has a first flange for detaining the first side panel, a second flange for detaining the second side panel, and first and second longitudinal detaining units for positioning strips perforated by columns of holes aligned with through apertures. The first and second longitudinal detaining units are located at sides of the rear panel. The strips are insertable into one of said strip detaining units. A plurality of guide plates have guide pins and a rear side.