• The Journal of Korean Institute of Communications and Information Sciences
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• v.27 no.4C
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• pp.365-370
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• 2002

In this paper external image multi-processing digital signal the transmit is the possibility of doing system with the PCI the design. The bottle-neck which it follows in transmission ratio limit of the CPU and the circumference machineries and tools against the image data which with the improve one thing becomes the processing with the real-time efficiently the transmit and the control is the possibility of doing structure the proposed. The also with the resource amount used 13% reduced which PCI fast data transfer and DMA function. The designed is operation verification against the function and the timing which use Max+plus II.

• Journal of Information Processing Systems
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• v.13 no.1
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• pp.104-113
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• 2017

In this paper, we present an approach to transmit data from the source to the destination through a minimal path (least-cost path) in a computer network of n nodes. The motivation behind our approach is to address the problem of finding a minimal path between the source and destination. From the work we have studied, we found that a Steiner tree with bounded Steiner vertices offers a good solution. A novel algorithm to construct a Steiner tree with vertices and bounded Steiner vertices is proposed in this paper. The algorithm finds a path from each source to each destination at a minimum cost and minimum number of Steiner vertices. We propose both the sequential and parallel versions. We also conducted a comparative study of sequential and parallel versions based on time complexity, which proved that parallel implementation is more efficient than sequential.

• Journal of Information Processing Systems
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• v.13 no.1
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• pp.68-82
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• 2017

Nowadays, geographic information system (GIS) is developed and implemented in many areas. A huge volume of vector map data has been accessed unlawfully by hackers, pirates, or unauthorized users. For this reason, we need the methods that help to protect GIS data for storage, multimedia applications, and transmission. In our paper, a selective encryption method is presented based on vertex randomization and hybrid transform in the GIS vector map. In the proposed algorithm, polylines and polygons are focused as the targets for encryption. Objects are classified in each layer, and all coordinates of the significant objects are encrypted by the key sets generated by using chaotic map before changing them in DWT, DFT domain. Experimental results verify the high efficiency visualization by low complexity, high security performance by random processes.

• Proceedings of the Korea Information Processing Society Conference
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• 2010.11a
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• pp.436-438
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• 2010

중요한 정보를 보유하고 있는 인트라넷 서버의 보안을 강화하기 위해 공공기간에서는 최근에 인터넷과 인트라넷을 물리적으로 분리하여 운영하고 있다. 그러나 물리적으로 분리된 네트워크로 인해 서버간의 데이터 전송에 어려움이 발생하였다. 사용자들이 인터넷 자료를 인트라넷에서 사용하고 싶을 때 또는 그 반대의 경우에 자료교환이 불편하고 처리시간도 많이 소요되었다. 이 문제를 해결하기 위해 분리된 인터넷과 인트라넷간에 사용자들이 손쉽게 자료를 교환할 수 있는 시스템 개발이 필요하였다. 본 논문에서는 분리된 네트워크간에 대용량 파일의 효과적인 송수신 및 e-mail 을 발송할 수 있는 자료교환 아키텍처를 제안하고, 구현한 내용을 다루었다. 자료교환시스템을 구현함으로써 사용자에게 사용 편의를 제공하였고, 자료교환을 위한 행정처리 시간도 감소되었다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.517-519
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• 2011

WSN 환경은 센서 노드에서 싱크 노드로 센싱 정보의 전송시 특정 센서 노드나 심지어는 하나의 센서노드의 과부하로 인해 전체 센서 네트워크에 문제를 야기시키며, 과다한 센싱 정보 트래픽 발생 및 동적 토폴로지 변화에 따라 빈번한 데이터 손실이 발생하게 된다. 본 논문에서 제안하는 VSDR(Visualization Sensing Data Routing)은 GML 기반 지도에 센서 노드 간 패킷 이동 경로와 전송되는 패킷 트래픽 전송량을 가시화한다. 또한, VSDR은 센서 네트워크에서 발생하는 센싱 정보들의 오버헤드와 센서 노드의 고장 발생 시 동적으로 데이터 경로들을 재설정 메커니즘을 제안한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2021.11a
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• pp.506-507
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• 2021

대용량 실험데이터를 생성하는 가속기, 전자현미경, 전파망원경 등과 같은 첨단 실험장비들의 기술적 발전으로, 생성되는 실험데이터의 규모가 폭발적으로 증가하고 있다. 이에 따라, 데이터 분석연구에 대용량 데이터의 저장이 가능하고, 데이터 분석에 필요한 고성능 계산 서버를 갖춘 전문 데이터센터의 활용이 증가하고 있다. 본 논문에서는 이러한 전문 데이터센터를 연계한 데이터 분석 연구환경구축에서 가장 기본이 되는 데이터수집을 위한 고성능 데이터 전송 시스템을 구현하고, 이를 적용한 사례를 통해 제안하는 시스템의 효율성을 검증한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.248-249
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• 2023

블록체인의 데이터 중복 저장 문제를 해결하기 위해 소거 코드 기반의 분산 저장 방법이 제안되었고, 이에 따라 청크 데이터의 효율적인 전파가 중요해졌다. 본 연구는 이를 위해 QUIC 프로토콜을 도입하여 청크 데이터의 신속한 전파 기능을 구현하였다. 더불어 Reed-Solomon 코드 기반 시스템에서 QUIC 프로토콜의 효용성을 검증한 결과, QUIC 프로토콜은 분산 저장 시스템에서 청크 데이터 전파와 재인코딩 성능에 결정적 역할을 수행함을 확인하였다. 이는 QUIC 프로토콜이 블록체인과 같은 네트워크 환경에서 효과적으로 사용될 수 있음을 나타낸다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.12 no.4
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• pp.1655-1673
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• 2018

Mobile computing environment is subject to the constraints of bounded network bandwidth, frequently encountered disconnections, insufficient battery power, and system asymmetry. To meet these constraints and to gain high scalability, data broadcasting has been proposed on data transmission techniques. However, updates made to the database in any broadcast cycle are deferred to the next cycle in order to appear to mobile clients with lower data currency. The main goal of this paper is to enhance the transaction performance processing and database currency. The main approach involves decomposing the main broadcast cycle into a number of sub-cycles, where data items are broadcasted as they were originally sequenced in the main cycle while appearing in the most current versions. A concurrency control method AOCCRBSC is proposed to cope well with the cycle decomposition. The proposed method exploits predeclaration and adapts the AOCCRB method by customizing prefetching, back-off, and partial backward and forward validation techniques. As a result, more than one of the conflicting transactions is allowed to commit at the server in the same broadcast cycle which empowers the processing of both update and read-only transactions and improves data currency.

• Journal of Korea Spatial Information System Society
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• v.11 no.2
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• pp.111-118
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• 2009

Recently many global enterprises build RTLS system for their environments. RTLS is used to detect object at real tim e. Unlike RFID, RTLS tags are read automatically and continuously, independent of the process that moves the tags. The proposed functionality of standard API has two problems. When middleware provides data to application, it sends a huge amount of data that may be useless. When only an application requests for data, the middleware replies result data in synchronous mode. This paper proposes a method to reduce an amount of data transferring from middleware to application and an addition communication mode to support real-time event processing in the middleware. Also, we designed and implemented an RTLS middleware applying the proposed methods.

• Smart Structures and Systems
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• v.7 no.3
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• pp.229-240
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• 2011

Recent developments in Smart Structures with very large scale embedded sensors and actuators have introduced new challenges in terms of data processing and sensor fusion. These smart structures are dynamically classified as a large-scale system with thousands of sensors and actuators that form the musculoskeletal of the structure, analogous to human body. In order to develop structural health monitoring and diagnostics with data provided by thousands of sensors, new sensor informatics has to be developed. The focus of our on-going research is to develop techniques and algorithms that would utilize this musculoskeletal system effectively; thus creating the intelligence for such a large-scale autonomous structure. To achieve this level of intelligence, three major research tasks are being conducted: development of a Bio-Inspired data analysis and information extraction from thousands of sensors; development of an analytical technique for Optimal Sensory System using Structural Observability; and creation of a bio-inspired decision-making and control system. This paper is focused on the results of our effort on the first task, namely development of a Neuro-Morphic Engineering approach, using a neuro-symbolic data manipulation, inspired by the understanding of human information processing architecture, for sensor fusion and structural diagnostics.