Electronics and Telecommunications Research Institute

Silicon Works Co., Ltd.

Lg Household & Health Care Ltd.

Sang-Min Lee

Hong-Yeon Kim

Young-Kyun Kim

Myung-Hoon Cha

Myung-Joon Kim

Baik-Song An

Jung-Tae Kim

Jong-Hyun Kim

Ji-Hyeon Song

Seung-Woo Lee

Ik-Kyun Kim

Bhum-Cheol Lee

Soo-Young Kim

Chei-Yol Kim

Jung-Hee Lee

Jong-Hoon Lee

Dae-Sung Moon

Young-Chang Kim

Young-Ho Park

Jeong-Sook Park

Youngsoo Kim

Jong-Hoon Kim

In-Ho Lee

Jae-Hyun Ahn

June Hwan Kim

Young Kyun Kim

Ji-Young Kim

Seong-Woon Kim

Kwang-Won Koh

Kang-Ho Kim

Jung Tae Kim

Hong Yeon Kim

Joon-Ho Na

Hyun Joo Kim

Young-Su Kim

Ki-Jong Koo

Han Namgoong

Myung Hoon Cha

Jong Geun Park

Kang-Il Choi

Ji-Hun Kim

Yeong-Joon Son

Jonghyun Kim

Hae-Won Lee

Sunoh Choi

Kang-II Choi

Ki-Sung Jin

Jong-Geun Park

Disclosed herein are an apparatus and method for updating an Internet-based malware detection engine using virtual machine scaling. The method may include creating a scaling group and an update group set based on a first virtual machine image, creating a second virtual machine image for a running virtual machine in response to occurrence of a snapshot event in the virtual update group run based on the first virtual machine image, modifying the scale-out image of the scaling group to the second virtual machine image, updating the scaling group by triggering a scale-out event and a scale-in event in the scaling group in response to occurrence of an update event, and modifying the scale-in image of the scaling group to the second virtual machine image.

Apparatus and method for updating internet-based malware detection engine using scaling control of virtual machine

Disclosed herein are an apparatus and method for page allocation in a many-to-one virtualization environment. The method may include determining whether a page fault interrupt is caused by page initialization for page allocation, sending an ownership change message to a node having ownership of the corresponding page when the page fault interrupt is determined to be caused by page initialization, and initializing the corresponding page upon receiving an ownership-change-processing-complete message.

Apparatus and method for page allocation in many-to-one virtualization environment

Disclosed herein are an apparatus and method for processing fast persistent writing to nonvolatile memory. A method for processing fast persistent writing to a nonvolatile memory includes writing log data from a last storage position in a data block created in a certain size, reflecting the entire data block in a storage medium, increasing the last storage position by a size of the written log data, and reflecting the entire data block in a storage medium, wherein the data block is linearly linked to an additional data block in a creation order, and wherein the data block includes a log data storage region, information about a last storage position where the log data is stored in the log data storage region, and information about a linked next data block.

Apparatus and method for fast persistent writing to nonvolatile memory

Disclosed herein are an apparatus for detecting unknown malware using a variable-length operation code (opcode) and a method using the apparatus. The method includes collecting opcode information from a detection target, generating a multi-pixel image having a variable length by performing feature engineering on the opcode information; and detecting unknown malware by inputting the multi-pixel image to a deep-learning model based on AI.

Apparatus for detecting unknown malware using variable opcode sequence and method using the same

Disclosed herein are an apparatus and method for detecting a malicious script. The apparatus includes one or more processors and executable memory for storing at least one program executed by the one or more processors. The at least one program is configured to extract token-type features, each of which corresponds to a lexical unit, and tree-node-type features of an abstract syntax tree from an input script, to train two learning models to respectively learn two pieces of learning data that are generated in consideration of features extracted respectively from the token-type features and the node-type features as having the highest frequency, and to detect whether the script is a malicious script based on the result of ensemble-based malicious script detection performed for the script, which is acquired using an ensemble detection model generated from the two learning models.

Apparatus and method for detecting malicious script

Disclosed herein are a hybrid memory management apparatus and method for an many-to-one virtualization environment. The hybrid memory management apparatus is implemented in an inverse-virtualization-based multi-node computing system including multiple physical nodes, each containing hybrid memory in which DRAM and NVRAM coexist, a virtual machine, and hypervisors, and includes memory for storing at least one program, and a processor for executing the program, wherein the program includes a remote request service module for processing a page-related request with reference to the hybrid memory and responding to the page-related request by transmitting a result of processing, an internal request service module for processing an internal page fault request with reference to a hybrid memory and responding to the internal page fault request, and a data arrangement module for responding to an inquiry request for a location at which a newly added page is to be arranged in the hybrid memory.

Hybrid memory management apparatus and method for many-to-one virtualization environment

Disclosed herein are a distributed system and a method for operating the distributed system. The method for operating a distributed system including a server and multiple clients includes acquiring, by a first client of the multiple clients, a lock on a shared resource using a first table of the server and a second table of the client, and releasing, by the first client, a lock on the shared resource using the first table and the second table, wherein the first table is a lock (DSLock) table for storing information about a distributed shared resource, and the second table is a data structure (DSLock_node) table for a lock request.

Distributed system for distributed lock management and method for operating the same

The present invention provides a preparation for attaching to teeth or tooth peripheries, which comprises a malleable oral composition and an active ingredient for intra-oral delivery. Further, the present invention provides a preparation for attaching to teeth or tooth peripheries, which comprises an oral composition in a hardening ointment-phase and an active ingredient for intra-oral delivery. The preparation of the present invention may give high adhesive force to the desired site in spite of gaps between teeth or curves of teeth. The preparation of the present invention having high adhesive force increases the time of adhesion to a target site in the oral cavity, and thus may be advantageous in achieving an intended effect.

Preparation for attaching to teeth or surrounding part of teeth

Disclosed herein are a metadata server and a method for distributing metadata in units of directories using the metadata server. The method includes receiving a request for at least one of creation, deletion and retrieval from a user file system; acquiring an inode corresponding to an identifier of a parent inode, which is included in the request; searching the parent inode for a dentry corresponding to the request when the request is a request to create a directory; selecting a secondary metadata server in which a new directory is to be created in order to distribute metadata in units of directories; requesting the selected secondary metadata server to create an inode; receiving an identifier of the created inode from the secondary metadata server; and adding a new dentry to the parent inode using the identifier of the inode.

Metadata server and method for distributing metadata in directories using the same

A method, an apparatus, and a system for analyzing traffic through obtaining flow data of a flow from a switch or a router of a network, calculating an average byte per packet rate (BPR) and a TCP flag ratio (TCPFR) for all flows included in a session including the flow using the flow data, and comparing the average BPR and the TCPFR with an average BPR and a TCPFR of previously-known traffic and determining whether the traffic including the flow is normal traffic or abnormal traffic based on the comparison result are provided.

Method and apparatus for analyzing traffic based on flow in cloud system

A distributed storage server includes a plurality of data server devices and a plurality of metadata server devices. The metadata server devices store metadata associated with data which is distributively stored in the data server devices. A selected metadata server device checks whether a dangling directory occurs by performing a rename operation, based on information associated with a full path of a parent directory of a source and a full path of a parent directory of a target included in a request of the rename operation. When it is determined that the dangling directory does not occur, the selected metadata server device processes transactions directed to the metadata such that the rename operation is performed. The checking whether the dangling directory occurs is performed before a transaction period for processing the transactions.

Distributed storage server, server device included therein, and method of operating server device

Disclosed herein are a method and system for supporting user-level DMA I/O in a distributed file system environment. The system includes a DMA I/O library located in a user space and configured to process data-processing requests of an application using a control channel or a data channel, a distributed file system client process located in the user space and configured to process data while communicating with a remote distributed storage cluster, a VFS located in a kernel space, and a FUSE kernel module located in the kernel space, wherein the control channel is a path along which the DMA I/O library and the distributed file system client process are connected to each other through the VFS and the FUSE kernel module, and wherein the data channel is a path along which the DMA I/O library and the distributed file system client process are directly connected to each other.

System and method for supporting user-level direct memory access input/output in distributed file system environment

Disclosed herein is a distributed file system using a torus network. The distributed file system may include multiple servers. The multiple servers are connected with each other through an n-dimensional torus network, and each of the multiple servers may be arranged along n-dimensional axes. Among the servers in the distributed file system, a server group of an (n&#x2212;1)-dimensional torus network may be connected to a public network. Different loads of the distributed file system may be distributed based on the axes. Through the distribution, the processing performance of the distributed file system may be improved.

Distributed file system using torus network and method for configuring and operating distributed file system using torus network

Disclosed herein is a network selecting apparatus including: a determining unit checking an operation state of a cache server in which replicated data corresponding to a data request signal are stored and determining whether the cache server is normally operated, when the data request signal is received from a client; and a selecting unit selecting a first network so that the replicated data are transmitted to input and output devices when the cache server is normally operated and selecting a second network so that original data corresponding to the data request signal are transmitted from a storage server in which the original data are stored to the input and output devices when the cache server is not normally operated.

Network selecting apparatus and operating method thereof

Disclosed are a method and apparatus for reading data in a distributed file system in which a client and a server are separated. In the method and apparatus, a prefetching operation is performed to provide a continuous read function with high performance even in the distributed file system so that an optimum continuous read function of a local file system within the client may be effectively supported when an application program of the client requests continuous reading on a file (or chunk).

Method and apparatus for reading data in distributed file system

Growing community of inventors

Daejeon, South Korea

Sang-Min Lee