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.

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: Disclosed is a method and apparatus for manufacturing an optical fiber preform, using an outside vapor deposition (OVD) process, in which deposition and sintering processes can be continuously carried out in an OVD apparatus. The manufacturing apparatus includes a vertically-extending carriage, and a sintering unit installed at the upper end of the carriage, and adapted to sinter a clad deposited on a circular target rod. The sintering unit is a hydrogen/oxygen flame burner or a furnace using a heating source that doesn't generate H20 or hydroxyl groups (OH) during a heating operation thereof The manufacturing method includes a deposition step of depositing a clad on the circular target rod while reciprocating a deposition burner, and a sintering step of sintering the clad while reciprocating the sintering unit in a state in which the circular target rod deposited with the clad extends through the sintering unit.

Abstract: Disclosed is a photodiode and a method for fabricating the same for reducing excessive electric field applied to a mesa-etched region, thereby providing a stable operation and a longer durability. The photodiode includes a substrate, a first conduction type buffer layer formed on the substrate, an amplifying layer having a superlattice structure formed on the first conduction type buffer layer to form a mesa structure, a second conduction type field controlling layer formed on the amplifying layer, a second conduction type ion injection layer formed within the field controlling layer, a second conduction type light-absorbing layer formed on the field controlling layer, a second conduction type buffer layer formed on the light-absorbing layer, and a first electrode and a second electrode formed to electrically contact the first conduction type buffer layer and the second conduction type buffer layer, respectively.

Abstract: Disclosed are method and apparatus for fabricating an optical fiber preform in OVD (Outside Vapor Deposition) by depositing soot particles, generated by reaction of gas emitted from a burner, on a surface of a rotating mandrel. In the method and apparatus, it is controlled so that deposition concentration of the soot particles deposited on the preform is kept constant regardless of a radius of the preform or gradually increasing outward by keeping constant or gradually decreasing a trajectory velocity of a certain time on the surface of the rotating preform while depositing the soot particles.

Abstract: An Outside Vapor Deposition (OVD) apparatus for making an optical fiber perform 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 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 avalanche photodiode for use in super-high speed optical communication, more particularly, to a structure of an avalanche photodiode device capable of suppressing edge breakdown to increase avalanche gain factor of a light signal and to reduce a noise. The avalanche photodiode includes a wafer characterized in that the guard ring has a depth equal to that of a center part of the active region (diffused region), an edge of the active region is shallower than the center part, and the guard ring is electrically isolated from the active region. Therefore, a gain-bandwidth characteristic may be increased, and also the higher receiver sensitivity may be achieved.

Abstract: The present invention relates to an optical filter whose a sidelobe disturbing a characteristic of an optical filter by weighting an optical coupling efficiency between waveguides is controlled upon applying a selective area growth method in a wavelength selective variable semiconductor optical filter and method of fabricating the same. The present invention can control the thickness of growth layer selectively by controlling the width of the dielectric thin film mask whose the growth is not achieved in the selective area growth method, can control the distance between two waveguides of the wavelength selective variable semiconductor optical filter by applying the result on the distance control between two waveguides. Accordingly, there can be changed an optical coupling efficiency between two waveguides spatially.