Abstract: A semiconductor laminate film includes a silicon substrate and a semiconductor layer formed on the silicon substrate and containing silicon and germanium. The semiconductor layer having a surface roughness Rms of 1 nm or less. Further, the semiconductor layer satisfies the following relationship t?0.881×x?4.79 where t represents a thickness (nm) of the semiconductor layer, and x represents a ratio of the number of germanium atoms to a sum of the number of silicon atoms and the number of germanium atoms in the semiconductor layer. Also, the semiconductor layer being a mixed crystal semiconductor layer containing silicon and germanium.

Abstract: An object is to prevent eavesdropping in quantum key distribution. A decoding unit decodes a quantum signal incident thereinto. A plurality of detect photons of the decoded quantum signal output from the decoding unit. A signal processing unit detects bits of the decoded quantum signal based on photon detection results of the plurality of detectors. A control unit perform switching processing by switching destinations to which two decoded quantum signals corresponding to one encoding basis are output between the plurality of detectors, and switching the bits detected by the signal processing unit based on the respective photon detection results of the plurality of detectors.

Abstract: A quantum key distribution device is provided with an encoding unit which encodes an optical pulse train; an intensity modulating unit which subjects the encoded optical pulse train to N (where N is an integer at least equal to 3) types of intensity modulation having mutually different intensities, with different timings; and a first key distillation processing unit which generates an encryption key on the basis of a data sequence obtained by removing data obtained from an optical pulse having a specific modulation pattern from a data sequence used by the encoding unit and the intensity modulating unit.

Abstract: A multimedia middleware apparatus using metadata, a control method and a storage medium are provided which can receive metadata in multimedia middleware provided in a terminal, easily add/delete/change a service, and effectively maintain and manage middleware components. When an open multimedia terminal processes multimedia contents, a multimedia middleware service structure for expressing information of a name, configuration, version and application programming interface (API) update is configured in the form of metadata. Lists of standard and non-standard services of multimedia middleware are then generated and managed.

Abstract: A method for providing a healthcare program service over a wireless communication network includes receiving vital signals for a condition from measurement devices transmitted from multiple users and grouping the received vital signals, registering by a plurality of service providers corresponding healthcare programs classified by particular diseases, providing a healthcare program service to the multiple users, receiving feedback of use satisfaction for the healthcare programs from each user, counting the number of uses and gathering utilization information for each of the healthcare programs. The method further includes searching for a corresponding group of users using each healthcare program, adding up the user satisfactions and utilizations, databasing the results and upon receipt of vital signals for a condition from a particular user, comparing against similar signals and recommending a preferred healthcare program for a corresponding user group having vital signals for the condition.

Abstract: Disclosed is a method and system for analyzing stress and managing stress by using a mobile electronic apparatus and a data management server. The method includes: generating bio-signal pattern information upon periodically receiving a bio-signal from a bio-signal measuring device connected to each of a plurality of unspecified individuals, and forming reference information for stress analysis based on received answers to each of a plurality of questions for checking a stress level; receiving bio-signal pattern information from a bio-signal measuring device connected to a specified user; and determining a stress level corresponding to the bio-signal pattern information of the specified user based on the reference information.

Abstract: A method, medium, and system generating a depth map of a video image are provided. The depth map generating method extracts the ground of a video image other than an object from the video image, classifies the video image as a long shot image or a non-long shot image based on a distribution value of the extracted ground, calculates a depth value gradually varied along a predetermined direction of the extracted ground when the video image corresponds to the long shot image and calculates a depth value based on the object when the video image corresponds to the non-long shot image. Accordingly, a sense of space and perspective can be effectively given to even a long shot image in which the ground occupies a large part of the image and a stereoscopic image recognizable by a viewer can be generated even if rapid object change is made between scenes in a video image.

Abstract: Provided is a location measurement method of a mobile node using a predictive filter is provided for improving the location measurement accuracy of the mobile node. The location measurement method of a mobile node detects change of movement pattern of the mobile node, corrects weights of a location measurement period and a predictive filter depending on the change of movement pattern, and compensates a location of the mobile node using the corrected weights of the location measurement period and predictive filter.

Abstract: An authentication method is provided in which a first portable device generates and transmits a first random number and a first timestamp to a first USIM in the first portable device; the first USIM calculates a first sign for the first portable device; the first portable device requests authentication for authenticated communication from a second portable device through transmission of the first random number, the first timestamp, and the first sign to the second portable device; the second portable device generates a second random number and a second timestamp and transmits the information to a second USIM in the second portable device; the second USIM generates a second sign for the second portable device and a second personal key which the second portable device transmits to the first portable device; the first portable device then transmits the information to the first USIM which generates a first personal key for authenticated communication.

Abstract: A method for constructing a database to deduce a disease and constructing a Bayesian network for U-Health application, the method including the steps of analyzing U-Health information, which includes a disease, a symptom, and a treatment, and constructing a plurality of U-Health ontologies required for service provision, setting a meta-model defining cause-and-effect relationships between the constructed U-Health ontologies and selecting at least two specific U-Health ontologies from among the plurality of U-Health ontologies, setting the selected U-Health ontologies as nodes, and generating a Bayesian network by applying the meta-model to the set nodes.

Abstract: A method and apparatus for detecting a signal in a communication system using at least two transmit antennas are provided. The signal detection method and apparatus includes selecting a symbol corresponding to a lowest branch metric from among symbols, the number of which corresponds to a modulation scheme, determining a candidate symbol by extending a process of selecting a symbol corresponding to a lowest branch metric from among the selected symbols, to a number which is less by one than the number of the transmit antennas, setting an accumulated branch metric of the candidate symbol as a threshold, removing a symbol having an accumulated branch metric higher than the threshold, and selecting, as a last received symbol, a symbol corresponding to a path having the lowest accumulated branch metric among paths selected without being removed until a last stage.

Abstract: A security management method in multimedia middleware of a terminal that can download a multimedia service provided from an external entity. The security management method includes if there is an access request for a particular multimedia service, determining whether there is a corresponding multimedia service; if the access-requested multimedia service does not exist in middleware of the terminal, performing negotiation for secure session setup with the external entity; setting up a secure session to the external entity using a security parameter selected as a result of the negotiation; and receiving information for the download from the external entity through the secure session, and determining whether to execute the download.

Abstract: An apparatus and method for detecting a signal in a receiver by maximum likelihood (ML) are provided, in which symbols are detected according to the number of transmit antennas of a transmitter and a modulation scheme, channels are estimated, an equivalent channel matrix corresponding to the estimated channels is determined, a permuted equivalent channel matrix is determined by multiplying the equivalent channel matrix by a predetermined permutation matrix, the permuted equivalent channel matrix is QR decomposed, a hard decision is performed on predetermined symbols among the detected symbols using a received signal resulting from the QR decomposition, and the log likelihood ratios (LLRs) of the hard-decided symbols are determined.

Abstract: A method of generating multi-channel local oscillation frequencies in an ultra wide band communication system includes generating: at least one reference frequency, a plurality of auxiliary frequencies by dividing and multiplying the at least one reference frequency, and a plurality of first local oscillation frequencies by mixing the reference frequency and at least some of the plurality of auxiliary frequencies with other auxiliary frequencies.

Abstract: Disclosed is a method for extracting a region-of-interest of a user in a multimedia mobile terminal. The method includes: setting a search region in an input picture input to the multimedia mobile terminal on a screen picture-to-screen picture basis, and extracting a group of boundary of a region-of-interest based on a brightness difference between the set search region and an environment around the set search region; determining boundary coordinates of the region-of-interest through learning during a predetermined frame among the extracted group of boundary coordinate candidates; and enlarging the region-of-interest having the determined boundary coordinates, and displaying the enlarged region-of-interest. As a result, a region the user is most interested in or pays more attention to than other regions on a screen is automatically extracted.

Abstract: An algorithm or an authentication system for a low-cost authenticating device such as a radio frequency identification (RFID) tag, or a sensor node are provided, by which authentication is processed efficiently without requiring a random number. A claimant entity attempting to be authenticated and a verifying entity to authenticate the claimant entity, share a plurality of secret keys so that authentication is processed as the claimant entity responds to a challenge by the verifying entity. The verifying entity and the claimant entity perform authentication using Learning Parity with Noise (LPN) problem. The claimant entity may generate an encrypted value for use in the authentication, using a basic Boolean Exclusive OR and a logical AND operations.

Abstract: An algorithm or an authentication system for a low-cost authenticating device such as a radio frequency identification (RFID) tag, or a sensor node are provided, by which authentication is processed efficiently without requiring complicated hardware. A claimant entity attempting to be authenticated and a verifying entity to authenticate the claimant entity, share a plurality of secret keys so that authentication is processed as the claimant entity responds to a challenge by the verifying entity. The verifying entity and the claimant entity perform authentication using Learning Parity with Noise (LPN) problem. The verifying entity and the claimant entity generate keys independently from one another, and exchange the generated keys. The claimant entity may generate an encrypted value for use in the authentication, using a basic Boolean Exclusive OR and a logical AND operations.

Abstract: An iterative tree search-based preceding method for a multi-user Multi-Input Multi-Output (MIMO) communication system includes determining a reference value of a cumulative branch metric of a candidate symbol, eliminating candidates having values that exceed the determined reference value of the cumulative branch metric of the candidate symbol, and registering values, which do not exceed the determined reference value of the cumulative branch metric of the candidate symbol, as entries, and selecting the least value from the values registered as the entries. Thereby, the method has low complexity and similar performance compared to an existing Sphere Encoding (SE) technique.

Abstract: Disclosed herein is an optical interconnecting system for transmitting a large amount of data. The system includes a bidirectional transmitting/receiving circuit that is installed at each of both ends of a data line between chips or boards, selectively receives an electric signal or an optical signal, amplifies and converts the received signal and selectively outputs the signal. The optical interconnecting system integrates a transmitter and a receiver into one bidirectional transmitting/receiving circuit to reduce circuit design and manufacturing costs and decrease power consumption. The system can integrate the bidirectional transmitting/receiving circuit in a highly integrated semiconductor chip and extend it to a multi-dimension multi-channel form to produce a compact package.

Abstract: Provided is a location measurement method of a mobile node using a predictive filter is provided for improving the location measurement accuracy of the mobile node. The location measurement method of a mobile node detects change of movement pattern of the mobile node, corrects weights of a location measurement period and a predictive filter depending on the change of movement pattern, and compensates a location of the mobile node using the corrected weights of the location measurement period and predictive filter.