Abstract: A hybrid integrated structure of an optical active device and a Planar Lightwave Circuit (PLC) device using an optical fiber array is provided, in which one or more photodiodes are integrated on an upper cladding layer above one or more planar optical waveguides. A section located on a boundary surface between output optical waveguides, that is, an end of the PLC device in the direction of propagation of light, and the input end of an output optical fiber array is ground to be inclined at a predetermined angle with respect to an optical axis. Further, one or more optical fibers and one or more reflection mirrors are alternately arranged, inserted, and disposed in a plurality of V-shaped trenches formed in the output optical fiber array.

Abstract: An optical fiber unit for air blown installation includes at least one optical fiber having a core layer and a clad layer, a protective layer coated on the surface of the optical fiber; and protrusions made of polymer resin and formed on the outer circumference of the protective layer in a banded shape. The protrusions may be formed either by supplying polymer resin to the outer circumference of the optical fiber with passing the optical fiber through an extrusion dice in which grooves of a predetermined shape are formed on a hollow inner circumference thereof, or by supplying polymer resin to the outer circumference of the optical fiber through nozzles with moving the optical fiber in a longitudinal direction.

Abstract: An Outside Vapor Deposition (OVD) apparatus for making an optical fiber preform with uniform deposition of silica particles through uniform heating to the overall length of the preform includes a mandrel having a predetermined length and driven to rotate and a burner for emitting a combustion gas together with a combustion gas toward the mandrel and burning the combustion gas to make silica particles to that the silica particles are deposited on a surface of the mandrel, wherein the burner has a length corresponding to the length of the mandrel and provides uniform temperature throughout the overall length of the mandrel at the same time.

Abstract: Disclosed is an optical fiber unit for air blown installation, which includes at least one optical fiber; a buffer layer surrounding the optical fiber and made of radiation curing acrylate; an outer layer surrounding the buffer layer and made of radiation curing acrylate; and a group of solid particles attached to a surface of the outer layer and having an average diameter of 80 to 140 mm and a specific weight of 2 to 3 g/cc. Thus, there is provided a structurally stable optical fiber unit, which allows easy control of particles while the optical fiber unit is produced, and also has improved installation properties.

Abstract: A communication cable includes at least one twisted wire pair formed by twisting a plurality of insulation-coated wires; a sheath surrounding the twisted wire pair; and a protrusion formed on an outer surface of the sheath. This communication cable may prevent alien crosstalk particularly at high-speed transmission so that transmission characteristics of the communication cable may be stably kept.

Abstract: Provided is an apparatus and method for comparing a protein structure, which can search a protein similar to an inquiry protein in a 3D protein database in real time by describing a feature of a protein structure by using a three-dimensional (3D) relative directional angle (RDA) and a Fourier descriptor. The apparatus includes: a 3D RDA coder configured to code a 3D RDA of a target protein data or an inquiry protein data inputted from the outside; a Fourier transformer configured to obtain Fourier coefficients by Fourier transforming 3D RDA coding values coded by the 3D RDA coder; a comparator configured to compare the obtained Fourier coefficient of the target protein data with the obtained Fourier coefficient of the inquiry protein data; and a data generator configured to output protein data in order from high similarity to low similarity according to the comparison result of the comparator.

Abstract: Provided is an apparatus and method for comparing structures of proteins by extracting main axes of the proteins using principal components analysis (PCA), dividing regions using grids into voxels for precise structure alignment, and placing the proteins respectively in the regions to calculate a similarity between the proteins by autocorrelation. The apparatus for comparing protein structures using principal components analysis (PCA) and autocorrelation includes: a PCA calculator for receiving a query protein for extracting a main axis of the query protein; a voxel generator for receiving information about the main axis from the PCA calculator and dividing a predetermined region using a grid to determine whether the divided region is occupied by the query protein for generating voxels of the query protein; and a comparison processor for performing an autocorrelation calculation between voxels of one protein and voxels of the other protein that are generated by the voxel generator.

Abstract: Provided is an apparatus and method for detecting a ligand through automatic specific site extraction and allow a convenient and speedy protein structure-based drug design by detecting sequences and structures of protein binding sites or detecting structures of protein binding sites, and then automatically extracting a specific site to detect a ligand. The ligand detecting apparatus includes: an input data processing unit for processing input data; a binding site extraction unit for extracting a binding site from the data; a user input unit for allowing a user to select a comparison type; a manual like-binding-site comparison unit for manually comparing a binding site of a target protein with a like binding site of a protein of a database to extract a specific site; an automatic like-binding-site comparison unit; and a ligand detection unit for performing virtual screening on the specific site.

Abstract: A micro coaxial cable includes an inner conductor; an insulation layer having foaming cells and formed to surround the inner conductor; an over-foaming preventing layer formed to surround the insulation layer for the purpose of uniform forming of the foaming cells; a metal shield layer formed to surround the over-foaming preventing layer; and a protective coating layer formed to surround the metal shield layer. The over-foaming preventing layer restrains abnormal growth of foaming cells formed in the insulation layer such that the foaming cells are successively adjacently formed with uniform size. Due to the uniformity of foaming, the dielectric constant of the insulation layer is not locally different but uniform as a whole, thereby capable of improving transmission characteristics. In addition, the micro coaxial cable enables to transmit signals even at a high frequency transmission of GHz range, which was impossible in the prior art.

Abstract: Disclosed is a tube for air blown installation and a tube cable using the same. The tube includes an outer layer made of polyethylene; and an inner layer co-extruded on an inner side of the outer layer and made of a mixture of polyethylene and siloxane, wherein the inner layer has a static coefficient of friction of 0.05 to 0.20, wherein the inner and outer layers respectively have a thickness equal to or less than 0.8 mm, and wherein no damage is caused in the tube having a length of 500 m when a pressure of 10 bars is applied thereto for 24 hours. The tube cable includes a sheath and a plurality of tube bundles. Each tube bundle is substantially identical to the above tube.

Abstract: A separator for a communication cable includes a plurality of barriers formed in a radial direction so that at least two pair units, in each of which at least two insulation-coated wires are spirally twisted, are received in spaces formed by the barriers one by one so as to separate the pair units from each other. At least one of the barriers has a relatively greater thickness than the other barriers. Thus, a communication cable having the separator may prevent PSNEXT (Power Sum Near and Crosstalk) caused by interference between adjacent wires when a high frequency signal is transmitted through the wires.

Abstract: A communication cable includes at least two pair units in each of which at least two insulation-coated wires are spirally twisted; a separator having a barrier for separating the pair units from each other; an outside jacket surrounding the separator and the pair units separated by the separator; and a plurality of jacket spacers provided to an inner surface of the outside jacket to separate the pair units from outside by a predetermined distance. Thus, the communication cable may prevent crosstalk generated when a high frequency signal is transmitted.

Abstract: The present invention relates to a method for searching a menu in a mobile communication terminal, wherein a plurality of main menus and sub menus of each main menu are simultaneously searched on a single menu screen using various navigational keys.

Abstract: Disclosed is a tube for installing an optical fiber unit having lubricous surface, which is installed in a communication pipe. The tube for installation includes an inner layer having lubricant components to decrease friction against an optical fiber unit, and an outer layer provided around the inner layer and composed of polymer having a lower friction coefficient than polyethylene so as to decrease friction when the tube is installed in the communication pipe. The tube is easier to install than the conventional one due to decreased friction against the communication pipe.

Abstract: A communication cable includes at least one twisted wire pair formed by twisting a plurality of insulation-coated wires; a sheath surrounding the twisted wire pair; and a protrusion formed on an outer surface of the sheath. This communication cable may prevent alien crosstalk particularly at high-speed transmission so that transmission characteristics of the communication cable may be stably kept.

Abstract: A communication cable includes a separator prepared in the cable for preventing alien crosstalk, and at least one spacer integrally formed with the separator at a side of the separator contacting with an outside jacket. The spacer forms a protrusion protruded out on the cable, and this protrusion makes the transmission wires in the cable be spaced apart from adjacent cables. Thus, alien crosstalk generated due to proximity of other cables during high frequency signal transmission may be prevented.

Abstract: A separator for a communication cable includes a plurality of barriers formed in a radial direction so that at least two pair units, in each of which at least two insulation-coated wires are spirally twisted, are received in spaces formed by the barriers one by one so as to separate the pair units from each other. At least one of the barriers has a relatively greater thickness than the other barriers. Thus, a communication cable having the separator may prevent PSNEXT (Power Sum Near and Crosstalk) caused by interference between adjacent wires when a high frequency signal is transmitted through the wires.

Abstract: A UTP (Unshielded Twisted Pair) cable having an electromagnetic wave shielding function is configured to allow transmission of over 10 Gbps level without align cross talk with an adjacent cable when using 500 to 700 MHz band. This UTP cable includes at least one wire pair in which two insulation-coated wires are spirally twisted, an electromagnetic wave shielding sheath surrounding the wire pair and made of polymer resin and conductive material, and an insulating sheath surrounding the electromagnetic wave shielding sheath and made of insulating material.

Abstract: A protein structure searching system including a protein database storing structural characteristics proteins wherein the characteristics include structural characteristics of an entire area and a sub-area of each protein; a data processing unit receiving structural characteristics of an entire area and a sub-area of a target protein from the protein database by using information on the target protein; an entire-area searching unit selecting a predetermined number of proteins having structural characteristics which are similar to those of the entire area of the target protein from the protein database; and a sub-area searching unit selecting a predetermined number of proteins having structural characteristics which are similar to the structural characteristics of the sub-area of the target protein from the protein database.