Abstract: Disclosed herein are a voltage regulator for impedance matching and pre-emphasis, a method of regulating voltage for impedance matching and pre-emphasis, and a voltage mode driver using the voltage regulator and the method. The voltage regulator includes a first loop circuit configured to regulate a supply voltage for a pre-driver of a main tap, a second loop circuit configured to regulate a supply voltage for a pre-driver of a pre-emphasis tap, and a driver voltage determination unit configured to include a reference resistor and to determine supply voltage for the voltage mode driver. The first loop circuit includes a variable resistor, a first main tap replica, and a first OP amp, and the second loop circuit includes a resistor having a resistance value identical to that of the reference resistor of the voltage regulator, a second main tap replica, a pre-emphasis tap replica, and a second OP amp.

Abstract: A method of mobile authentication with enhanced mutual authentication and handover security is disclosed. The method of mutual authentication in a mobile network in accordance with an embodiment of the present invention includes: generating at least one service ticket and session key corresponding to a mobile station in accordance with an authentication data request for the mobile station; encrypting the service ticket and the session key by using a user security key pre-assigned in accordance with the mobile station; sending the encrypted service ticket and session key to the mobile station by using a control message; and authenticating the mobile station by analyzing user mutual authentication information received from the mobile station. The present invention, therefore, can provide a more powerful and effective mutual authentication method in a mobile network.

Abstract: Provided are nanocrystal silicon layer structures formed using a plasma deposition technique, methods of forming the same, nonvolatile memory devices including the nanocrystal silicon layer structures, and methods of fabricating the nonvolatile memory devices. A method of forming a nanocrystal silicon layer structure includes forming a buffer layer on a substrate and forming a nanocrystal silicon layer on the buffer layer by a plasma deposition technique using silicon (Si)-containing gas and hydrogen (H2)-containing gas. In this method, the nanocrystal silicon layer can be directly deposited on a glass substrate using plasma vapor deposition without performing a post-processing process so that the fabrication of a nonvolatile memory device can be simplified, thereby reducing fabrication cost.

Abstract: Disclosed is a method of detecting even a very small amount of a target substance by mixing a linker and a spacer at a suitable ratio and immobilizing the mixture on the surface of carbon nanotubes in a carbon nanotube-based biosensor. This method detects a specific substance at the level of femtomoles and lowers the detection limit of conventional carbon nanotube transistor sensors. Accordingly, the method detects even a very small amount of a target substance, and thus the carbon nanotube-based biosensor is a highly useful sensor which can be used either as a medical sensor for diagnosing diseases or as an environmental sensor.

Abstract: Example embodiments are directed to a memory chip array including a plurality of cell arrays and at least one predecoder commonly connected to the plurality of cell arrays, wherein the memory chip array promotes an efficient arrangement structure of the memory chip array and is minimized in area.

Abstract: Disclosed herein is a DNA vaccine for treating cervical cancer including an E5 gene of human papillomavirus (HPV). Also, disclosed is a combination DNA vaccine for preventing and treating cervical cancer including a gene encoding HPV L1 and/or L2 along with the HPV E5 gene.

Abstract: A method of recommendation to a user is disclosed. In the method in accordance with an embodiment of the present invention, a recommendation system recommends a product to a user of an e-commerce site, which sells the product through the Internet. The method can include: collecting user behavior information of the user; analyzing the collected user behavior information; creating a recommendation tree for predicting a user preference for a certain product based on the analyzing; and recommending the product to the user based on the recommendation tree. The user behavior information is a command signal inputted by the user in the e-commerce site while the user is accessed to the e-commerce site, and the product can be classified into a plurality of items, which represent the product. The method in accordance with the present invention can analyze the user's preferences more quickly and accurately without inconveniencing the user.

Abstract: Disclosed is a method of recognizing an available channel in order to prevent channel occupation requirements from colliding with each other when one wireless channel is shared by plural terminals in a CSMA/CA mechanism using an IEEE 802.15.4 protocol slot, the method including: a first step of initializing a counter, CW, as 2, the CW being used for CCA which an attempt to perform is made before frame transmission; a second step of determining if a required channel is occupied; a third step of decreasing the CW by 1 when the channel is idle in the second step; a fourth step of re-determining if the channel is occupied; and a fifth step of, based on a determination result in the fourth step, determining if the CW is 1 when the channel is occupied.

Abstract: According to an aspect of the present invention, a data recording method in a holography optical memory system, for recording a two-dimensional pixel data page in a recording medium can be provided. In accordance with an embodiment of the present invention, the data recording method in a holography optical memory system can include recording sequentially the signal beams carrying one-dimensional pixel data lines, included in the original two dimensional pixel data page, in the recording medium by using the same reference beam. Here, the pixel data page can be recorded such that any two adjacent pixel data lines are partially overlapped with each other in an area of the recording medium.

Abstract: Provided is a resynchronization method of a mobile communication terminal. The resynchronization method for a mobile communication terminal connected to a home location register and a mobile communication network, includes: extracting a communication network serial number corresponding to a terminal authentication request instruction received from a mobile communication network; comparing the communication network serial number with a terminal serial number stored in a predetermined memory; generating nth terminal synchronization failure information if the communication network serial number is smaller than the terminal serial number, where n is a nature number; and transmitting the generated nth terminal synchronization failure information to the home location register. The home location register ends a resynchronization procedure if the nth terminal synchronization failure information is smaller than previously stored (n?1)th communication network synchronization failure information.

Abstract: The present disclosure relates to a flexible nonvolatile ferroelectric memory device, a 1T-1R (1Transistor-1Resistor) flexible ferroelectric memory device, and a manufacturing method for the same.

Abstract: The present application discloses a system and a method for tag estimation and anti-collision in an RFID system, which can estimate an exact number of tags within an RF area and can rapidly identify tags by using the estimated number of tags in an RFID system. The system includes an RFID reader and RFID tags. The RFID reader includes an identification means, a collision management means, a tag number estimation means, and a reader control means. The RFID tag includes a tag communication means, a message reading means, a counter management means, an information storage means, and a tag control means. The disclosed system and method can prevent occurrence of too many idle times slots in the DFSA and too many initial collisions in the binary tree scheme, and thus can identify a large number of tags at a high speed with a small number of time slots.

Abstract: There is provided an apparatus for the anti-islanding of a power conditioning system. The apparatus for the anti-islanding of a power conditioning system according to the present invention is applied to a power conditioning system including a DC/DC converter and a DC/AC inverter in order to transfer power from a solar cell array to a grid. The apparatus for the anti-islanding of a power conditioning system may include an injection signal generator generating an injection signal, an adder generating a final fundamental wave command value, a main controller performing the power control according to the final fundamental wave command value and stopping the operation of the power conditioning system when the level of the detected injection signal has reached the predetermined reference level or more, and an injection signal detector detecting the injection signal included in voltage and providing them to the main controller.

Abstract: A method for coating bioactive material and a structured coated with a bioactive material are disclosed. The bioactive material coating method includes: flowing a coating solution, produced as a bioactive material is dissolved in a mixed solvent, inside a structure having a lumen; and coating the bioactive material on at least one of inner and outer surfaces of the structure, with different concentrations. The mixed solvent is mixed with two or more solvents having different features. The occurrence of the strangulation of blood vessels and inflammation can be reduced. An increase in the size of the myofibroblast is not suppressed. The coating solution is produced as a medication is dissolved in a mixed solvent, where the mixed solvent is produced as a polar solvent and a nonpolar solvent are mixed with each other at a certain ratio.

Abstract: An apparatus and method for removing a transmission leakage signal from a radio frequency identification (RFID) reader are provided. The apparatus includes a removing unit having a device of a large impedance and a phase shifter capable of a wide range phase change with respect to a leakage signal, thereby optimally removing the transmission leakage signal irrespective of a change in the frequency characteristics and a change in the length of a cable.

Abstract: There is provided a surface plasmon resonance sensor including a metallic graphene layer formed in a core of a predetermined area of an optical fiber from which a jacket and a cladding are removed. Further, a preparing method of the surface plasmon resonance sensor and a surface plasmon resonance sensor system is also provided.

Abstract: Provided is an apparatus for estimating a frequency offset by one training symbol including two symbols having the same structure and value in an OFDM system. The apparatus includes a first likelihood function calculator for modeling non-Gaussian impulsive noise included in the training symbol to a Cauchy probability density function in which a characteristic exponent of a BIS?S probability density function is 1, and calculating a likelihood function of a Cauchy distribution using the Cauchy probability density function, and a first frequency offset estimator for estimating an effective frequency offset value in which the likelihood function of the Cauchy distribution of the first likelihood function calculator becomes highest as a frequency offset estimation value. Thereby, it is possible to improve the performance of frequency offset estimation in non-Gaussian impulsive noise environments.

Abstract: A transceiver is provided. The transceiver includes a transmission portion which generates a transmission signal; an antenna which transmits the transmission signal and receives a reception signal; a signal division element which receives the transmission signal from the transmission portion and inputs the received transmission signal to the antenna for transmission, and receives the reception signal received by the antenna; an extraction signal adjusting portion which extracts the transmission signal from the signal division element, and adjusts a phase of the extracted signal to generate an output signal; and a receiving portion which receives the reception signal from the signal division element, and applies the output signal from the extraction signal adjusting portion to the reception signal.

Abstract: A dynamic bias supply device for multiple parallel power amplifiers, in which a plurality of parallel power amplifiers including a Doherty amplifier are connected in parallel, is provided. The dynamic bias supply device includes a plurality of switches respectively corresponding to each of the parallel power amplifiers. The dynamic bias supply device is used in a distributed manner as multiple distributed dynamic bias switching circuits for the multiple parallel power amplifiers. Accordingly, performance deterioration is not caused by an additional connection structure, and it is possible to achieve high efficiency and high linearity of the power amplifiers.

Abstract: Disclosed is a method for manufacturing a flip chip, in which a gold typically used in a flip chip manufacturing is adhered by conductive adhesives, wherein the method comprises steps of depositing a metal seed layer on a substrate; applying and patterning a photoresist or a dry film; forming a gold bump by electroplating; patterning the seed layer; forming an insulating layer on the seed layer and upper end of the gold bump; and patterning an insulating layer. Accordingly, it is possible to manufacture a flip chip, in which electrical function between bumps can be evaluated, with less cost.