• Title, Summary, Keyword: Address translation

Search Result 113, Processing Time 0.045 seconds

Automatic English-Korean Address Translation System for Extremely Unpredictable Error Generating Language Environments (극한 언어 환경에 대응 가능한 영한 자동 주소번역 시스템)

  • Jin, Jingzhi;Hwang, Myeongjin;Lee, Seungphil
    • 한국어정보학회:학술대회논문집
    • /
    • /
    • pp.239-242
    • /
    • 2016
  • 데이터베이스 기반 자동 주소번역은 입력 오류에 취약하며 범용 기계번역을 이용한 주소번역은 입력 및 번역 주소에 대한 품질 평가가 어렵다. 본 논문에서는 예측할 수 없는 입력 오류에도 대응할 수 있는 자동 주소번역 시스템을 제안한다. 제안 시스템은 n-gram 기반 검색, 미검색/오검색 분류, 번역, 신뢰도 자동평가로 구성된다. 신뢰할 수 있는 입력으로 자동 분류한 영문 국내주소를 국문으로 번역한 결과 95%이상의 정확도를 보였다.

  • PDF

Utilizing Local Bilingual Embeddings on Korean-English Law Data (한국어-영어 법률 말뭉치의 로컬 이중 언어 임베딩)

  • Choi, Soon-Young;Matteson, Andrew Stuart;Lim, Heui-Seok
    • Journal of the Korea Convergence Society
    • /
    • v.9 no.10
    • /
    • pp.45-53
    • /
    • 2018
  • Recently, studies about bilingual word embedding have been gaining much attention. However, bilingual word embedding with Korean is not actively pursued due to the difficulty in obtaining a sizable, high quality corpus. Local embeddings that can be applied to specific domains are relatively rare. Additionally, multi-word vocabulary is problematic due to the lack of one-to-one word-level correspondence in translation pairs. In this paper, we crawl 868,163 paragraphs from a Korean-English law corpus and propose three mapping strategies for word embedding. These strategies address the aforementioned issues including multi-word translation and improve translation pair quality on paragraph-aligned data. We demonstrate a twofold increase in translation pair quality compared to the global bilingual word embedding baseline.

Development of Remote Management and Control System for VoIP Terminal (인터넷전화 단말기 원격관리 및 제어시스템 개발)

  • Song, Han-Chun;Ban, Ku-Ik
    • The Journal of The Institute of Internet, Broadcasting and Communication
    • /
    • v.11 no.6
    • /
    • pp.73-80
    • /
    • 2011
  • In this paper, we design and implementation of effective remote management system for VoIP(Voice over IP) terminal. Ordinary VoIP terminal is connected inside of NAT(Network Address Translation) assigned private IP address. NAT provides address mapping between outside public IP address and inside private IP address, for outside system telephone call is connected to inside VoIP terminal. In this paper, we also design and implementation of UDP hole punching function that the outside calls pass through the NAT, for outside management system call is connected to internal VoIP terminal, and gathered to management information of the VoIP terminal. Also, we evaluated and analysed of developed system in the test environment. As a result of test, It showed that it was well performed without any data error and data loss in the connectivity, and It showed that it was well gathered management information of the VoIP terminal.

Workload-Driven Adaptive Log Block Allocation for Efficient Flash Memory Management (효율적 플래시 메모리 관리를 위한 워크로드 기반의 적응적 로그 블록 할당 기법)

  • Koo, Duck-Hoi;Shin, Dong-Kun
    • Journal of KIISE:Computer Systems and Theory
    • /
    • v.37 no.2
    • /
    • pp.90-102
    • /
    • 2010
  • Flash memory has been widely used as an important storage device for consumer electronics. For the flash memory-based storage systems, FTL (Flash Translation Layer) is used to handle the mapping between a logical page address and a physical page address. Especially, log buffer-based FTLs provide a good performance with small-sized mapping information. In designing the log buffer-based FTL, one important factor is to determine the mapping structure between data blocks and log blocks, called associativity. While previous works use static associativity fixed at the design time, we propose a new log block mapping scheme which adjusts associativity based on the run-time workload. Our proposed scheme improves the I/O performance about 5~16% compared to the static scheme by adjusting the associativity to provide the best performance.

EAST: An Efficient and Advanced Space-management Technique for Flash Memory using Reallocation Blocks (재할당 블록을 이용한 플래시 메모리를 위한 효율적인 공간 관리 기법)

  • Kwon, Se-Jin;Chung, Tae-Sun
    • Journal of KIISE:Computing Practices and Letters
    • /
    • v.13 no.7
    • /
    • pp.476-487
    • /
    • 2007
  • Flash memory offers attractive features, such as non-volatile, shock resistance, fast access, and low power consumption for data storage. However, it has one main drawback of requiring an erase before updating the contents. Furthermore, flash memory can only be erased limited number of times. To overcome limitations, flash memory needs a software layer called flash translation layer (FTL). The basic function of FTL is to translate the logical address from the file system like file allocation table (FAT) to the physical address in flash memory. In this paper, a new FTL algorithm called an efficient and advanced space-management technique (EAST) is proposed. EAST improves the performance by optimizing the number of log blocks, by applying the state transition, and by using reallocation blocks. The results of experiments show that EAST outperforms FAST, which is an enhanced log block scheme, particularly when the usage of flash memory is not full.

Model Validation of a Fast Ethernet Controller for Performance Evaluation of Network Processors (네트워크 프로세서의 성능 예측을 위한 고속 이더넷 제어기의 상위 레벨 모델 검증)

  • Lee Myeong-jin
    • Journal of KIISE:Computing Practices and Letters
    • /
    • v.11 no.1
    • /
    • pp.92-99
    • /
    • 2005
  • In this paper, we present a high-level design methodology applied on a network system-on-a-chip(SOC) using SystemC. The main target of our approach is to get optimum performance parameters for high network address translation(NAT) throughput. The Fast Ethernet media access controller(MAC) and its direct memory access(DMA) controller are modeled with SystemC in transaction level. They are calibrated through the cycle-based measurement of the operation of the real Verilog register transfer language(RTL). The NAT throughput of the model is within $\pm$10% error compared to the output of the real evaluation board. Simulation speed of the model is more than 100 times laster than the RTL. The validated models are used for intensive architecture exploration to find the performance bottleneck in the NAT router.

Scheduler-based Defense Method against Address Translation Redirection Attack (ATRA) (메모리 주소 변환 공격에 대한 스케줄러 기반의 방어 방법)

  • Jang, Daehee;Jang, Jinsoo;Kim, Donguk;Choi, Changho;Kang, Brent ByungHoon
    • Journal of the Korea Institute of Information Security & Cryptology
    • /
    • v.25 no.4
    • /
    • pp.873-880
    • /
    • 2015
  • Since hardware-based kernel-integrity monitoring systems run in the environments that are isolated from the monitored OS, attackers in the monitored OS cannot undermine the security of monitoring systems. However, because the monitoring is performed by using physical addresses, the hardware-based monitoring systems are vulnerable to Address Translation Redirection Attack (ATRA) that manipulates virtual-to-physical memory translations. To ameliorate this problem, we propose a scheduler-based ATRA detection method. The method detects ATRA during the process scheduling by leveraging the fact that kernel scheduler engages every context switch of processes. We implemented a prototype on Android emulator and TizenTV, and verified that it successfully detected ATRA without incurring any significant performance loss.

NAT-PT Operation for IPv4 and IPv6 Nodes to Coexist (IPv4와 IPv6의 연동과 호환을 위한 NAT-PT에 관한 연구)

  • 이승민;민상원;김용진;박수홍
    • Proceedings of the Korean Information Science Society Conference
    • /
    • /
    • pp.532-534
    • /
    • 2000
  • IPv4(Internet Protocol version 4)의 차세대 버전인 IPv6는 기존 IPv4의 문제점인 주소부족 및 새로운 부가기능 등의 필요성 때문에 IETF(Internet Engineering Task Force)에서 IPv4를 대체하기 위해 개발한 프로토콜이다. 하지만 IPv4를 어느 한순간에 IPv6로 대체하는 것은 불가능하기 때문에 기존 IPv4와의 호환 및 연동을 위한 터널링 및 기타 여러 가지 transition mechanism들이 고려되고 있다. 이러한 mechanism들 중에서 최근 표준으로 발표된 NAT-PT(Network Address Translation $\square$ Protocol Translation)는 DNS-ALG (Domain Name System $\square$ Application Level Gateway)라는 개념을 도입하여 IPv4와 IPv6간의 양방향 주소변환 및 프로토콜 변환기능을 수행한다. 각각의 기능에서 주소 변환은 주소크기와 형식이 다른 IPv4와 Pv6간의 서로 상대 노드를 엑세스할 수 있도록 하고 프로토콜 변환은 다른 버전의 프로토콜을 사용하는 노드들이 상대노드가 보낸 패킷의 헤더정보를 이해할 수 있도록 한다. 그리고 이러한 기본적인 변환 외에 헤더정보의 정확한 전달을 위해서는 기존의 path MTU(Maximum Transgfer Unit) discovery 그리고 pseudo header checksum 등도 고려되어야 한다.

  • PDF

Support of IPv4 Service using the DSTM in IPv6 Netwroks (IPv6망에서 DSTM을 이용한 IPv4 서비스 제공방안)

  • 이승민;민상원;이숙영;신명기;김용진
    • Proceedings of the Korean Information Science Society Conference
    • /
    • /
    • pp.535-537
    • /
    • 2001
  • IPv6 초기 도입단계에서는 IPv4와 IPv6 (Internet protocol version 6)의 혼용이 예상됨에 따라 초기 IPv6 네트워크는 기존 IPv4와의 연동 및 호환을 위해 트랜지션 (transition) 메커니즘과 상호공존 (coexistence mechanism) 메커니즘을 필요로 한다. 이를 위해 다양한 트랜지션 메커니즘들이 제안되고 있는데 크게 터널링 (tunneling)과 변환 (translation) 방식으로 구분할 수 있다. 본 논문은 이러한 메커니즘 중에서 터널링을 이용한 DSTM (dual stack transition mechanism)을 분석한 후 제안된 DSTM의 각 연결별 임시 IPv4 주소할당에 대한 비합리적인 문제점을 개선한 모델을 제시하였다. 본 논문예서 제안한 모델은 기존의 NAT (network address translation) 방식과 유사하게 단일 IPv4 주소와 포트 넘버를 이용하여 각 연결을 식별할 수 있도록 한다. 그리고 DSTM 시스템 구현을 위한 효율적인 알고리즘 설계를 통해 IPv4 패킷을 IPv6 패킷으로 캡슐화 (encapsulation)하여 전송할 수 있는 인터페이스를 구현하여 결과를 분석하였다.

  • PDF

Quality of Service Supporting MPLS Network using CR-LDP and qGSMP Protocols (CR-LDP와 qGSMP을 이용한 MPLS 망의 QoS 지원)

  • 김인재;이병수
    • Journal of the Korea Computer Industry Society
    • /
    • v.2 no.4
    • /
    • pp.417-424
    • /
    • 2001
  • Internet networks consisting of existing routers show the limits in efficiency of traffic managements. In order to overcome the limits, MPLS System is high speed switching technology and is not based on IP address but based on label was designed. However MPLS system being based on ATM has the difficulties of supporting Qos(Quality of Service). This paper suggested the way to consist a service-assured-network using CR-LDP protocol which was designed for guaranteeing QoS in MPLS system being based on ATM switch and using qGSMP protocol, and the way to implicitly establish LSP by implementing QoS Translation and QoS Mapping in LER System.

  • PDF