Abstract: Provided are an optical alignment device applied to an assembly process of an optical transmitter and an optical receiver that include multi-channel optical elements and optical waveguide elements for optical communication, and an optical alignment method thereof. The optical alignment device includes an element fixing case with a mounting space formed thereinside and an element insertion hole communicating with the mounting space formed at an upper side thereof, and a light source mounted in the mounting space of the element fixing case and configured to emit light toward a lower side of an optical element or an optical waveguide element which is inserted into the element insertion hole to check a position of a core.

Abstract: A method and a device for controlling an access on the basis of a common resource in a communication system. An operating method of a terminal in a communication system includes: receiving configuration information of a common resource from a first base station among the plurality of base stations; receiving common information from the first base station through the common resource indicated by the configuration information; and performing a random access procedure with a second base station among the plurality of base stations by using the common information. Therefore, the performance of the communication system can be improved.

Abstract: Disclosed are an apparatus and a method for determining an identity of a WLAN system occupying a channel, using information within a signal field or time synchronization between target channels. For this, the present invention includes a preamble detecting unit configured to detect a preamble in each channel; a channel information obtaining unit configured to obtain reference time information when the preamble is detected in each channel, or to obtain signal field information in each channel using the detected preamble; and an identity determining unit configured to determine an identity of a WLAN system occupying each channel by comparing the reference time information obtained in each channel, or by comparing the signal field information obtained in each channel.

Abstract: Disclosed are a container information control system and a container information control method capable of simply and accurately collecting and controlling container information by using an optical or laser transceiver in which multiple paths or interference signals are not generated. A system for controlling information on containers according to an exemplary embodiment of the present invention includes: one or more transceivers connected to internal sensors of the containers, respectively, in which information on the respective containers is stored; and a wireless access point positioned at an uppermost container, and configured to receive the container information from the transceivers.

Abstract: Provided is an apparatus and method for recognizing a location by conversion of a frequency offset, the apparatus including a setting unit to receive, from a terminal, a plurality of signals comprising a first signal and a second signal, and to set a variable corresponding to each of the plurality of signals, a detector to detect a first residual phase of a carrier frequency of the first signal and a second residual phase of a carrier frequency of the second signal using the variables, and a recognizer to recognize a location of the terminal by calculating a difference between the first residual phase and the second residual phase.

Abstract: A server receives a first echo request message which complies with an Internet control message protocol, extracts filtering information from hear information of the received first echo request message, and when a second echo request message which complies with the Internet control message protocol is received, compares header information of the received second echo request message and the extracted filtering information so as to determine whether to block an attacking packet for the received second echo request message. According to the present invention, the server blocks the attacking packet using the Internet control message protocol, thereby blocking a denial-of-service attack.

Abstract: A method and an apparatus of interactive advertising service are provided. The method includes: receiving first advertising contents from a broadcasting advertisement platform; displaying broadcasting according to the first advertising contents on the overall screen together with at least one second advertisement contents interactive indicator indicating that the first advertising contents are linked with second advertising contents; receiving indicated information triggering at least one second advertising contents interactive indicator from an input device; receiving the second advertising contents indicated by the at least one second advertising contents interactive indicator from the broadcasting advertisement platform; and displaying broadcasting according to the second advertisement contents.

Abstract: Disclosed are an apparatus and a method for recognizing a location of an object using radio frequency Identification (RFID). The method for recognizing a location of an object includes: activating tags located around radio frequency identification (RFID) tags by transmitting power to the RFID tags in a magnetic resonance type; transmitting a call signal for identifying a mobile tag attached to an object; receiving a tag identifier of the mobile tag corresponding to the call signal; receiving location information from fixed tags around the mobile tag; and recognizing the location of the mobile tag using the location information.

Abstract: Disclosed is a coding apparatus and method using residual bits. Accordingly, performance (voice quality) is enhanced by quantizing a full-band gain of frequency coefficients existing in sub-bands to which bits are not assigned in an algebraic vector quantization (AVQ). Further, the performance (voice quality) is enhanced by sequentially quantizing a sub-band gain of sub-bands to which bits are not assigned until residual bits are removed. Furthermore, the performance (voice quality) is enhanced by demodulating AVQ coefficients, and correcting quantization noises starting with a coefficient having the greatest absolute coefficient among the AVQ coefficients, when residual bits additionally remain.

Abstract: Provided are a current switch driving circuit generating a signal for driving a current switch, and a digital-to-analog converter using the same. The current switch driving circuit includes a first PMOS transistor in which a source terminal is connected to a power supply terminal, a gate terminal receives an input signal, and a drain terminal outputs a driving signal, an NMOS transistor in which a drain terminal is connected to the drain terminal of the first PMOS transistor, and a gate terminal receives the input signal, a second PMOS transistor in which a source terminal is connected to a source terminal of the NMOS transistor, a gate terminal is connected to a bias voltage terminal, and a drain terminal is connected to a ground terminal, and a control current source allowing the second PMOS transistor to be maintained constantly in an ON state.

Abstract: A fast Fourier transform (FFT) apparatus and method. The FFT method may include finding a number of subcarriers carrying valid data in reception data, determining a Fourier transform order on the basis of the number of subcarriers, performing complex multiplication on the reception data, and then performing a Fourier transform of the determined Fourier transform order. Using the FFT method, it is possible to reduce the amount of computation and the complexity of an FFT in a frequency division multiplexing (FDM) system and simplify a hardware structure.

Abstract: Provided are a switching circuit and a small-size high-efficiency direct current-to-direct current (DC-DC) converter for portable devices including the same. Using dynamic threshold-complementary metal oxide semiconductor (DT-CMOS) transistors having dynamic threshold voltages as a switching device, the switching circuit maintains a low threshold voltage in a normal mode to improve current drivability while reducing conduction loss, and maintains a high threshold voltage in a standby mode to minimize power consumption. When the switching circuit is employed in a DC-DC converter, power conversion efficiency can be improved by reducing conduction loss in the normal mode, and power consumption can be minimized in the standby mode. Consequently, the DC-DC converter can maximize a use time of a battery of a portable device and can be useful in power supplies of portable devices that are gradually being miniaturized.

Abstract: Provided is an apparatus and a method for security managing of an information terminal. The provided classifies a plurality of information providing means into a plurality of domains including at least one information providing means and when a user process accesses any one domain and then attempts to access another domain, controls the access to said another domain by verifying whether or not the access of the user process to said another domain is allowed. According to the provided, security threats are monitored for each domain which an execution process accesses by simply constructing domain classification information of an entire system without specifically establishing a security policy of an information providing device, such that it is possible to protect a terminal from a multi-domain access process having high security risk. Accordingly, it is advantageous to increase security for the terminal from various security threats.

Abstract: A termination device for use in a WDM-SCM PON system can effectively support a multi-channel integration function of a WDM/SCM PON system.