Earticle

The Article explores what factors will critical facilitate customer participation in the system of blockchain. Based on previous studies, this paper develops variables based on the characteristics of blockchain applications, by analysis the most popular blockchain application in China which called “star” we summaries six independent variables such as (1) confidentiality, (2) availability, (3) economic, (4) profit, (5) reputation, (6) blockchain interest, and 2 mediators (1) Trust and (2) Performance expectation. By design questionnaire to collect data and empirical analysis, we find that blockchain have a strongest influence on blockchain participation intention, and all hypotheses are significant the result of this paper can give a useful contribution to blockchain participation not only use intention of blockchain.

The commercialization of Internet of Things (IoT) technology has enabled data-driven connectivity and automation across a variety of industries. In particular, the manufacturing field has developed into a smart factory that automates parts of the production process and optimizes manufacturing activities through data collection and analysis. In this smart factory environment, as security and scalability issues regarding large amounts of data generated within the network arise, the need for distributed ledger-based solutions is emerging. In this paper, we design a Directed Acyclic Graph (DAG) based distributed data management system that enables distributed data processing in a smart factory IoT network composed of multiple devices. The proposed system uses a DAGbased data storage structure and state channel technology to improve network efficiency, security, and scalability. The proposed system can comprehensively support heterogeneous IoT devices and ensure the integrity of data transmitted and received in this process.

the power of influence of the Internet grows steadily, attacks against the Internet can cause enormous monetary damages nowadays. A worm can not only replicate itself like a virus but also propagate itself across the Internet. So it infects vulnerable hosts in the Internet and then downgrades the overall performance of the Internet or makes the Internet not to work. To response this, worm detection and prevention technologies are developed. The worm detection technologies are classified into two categories, host based detection and network based detection. Host based detection methods are a method which checks the files that worms make, a method which checks the integrity of the file systems and so on. Network based detection methods are a misuse detection method which compares traffic payloads with worm signatures and anomaly detection methods which check inbound/outbound scan rates, ICMP host/port unreachable message rates, and TCP RST packet rates. However, single detection methods like the aforementioned can't response worms' attacks effectively because worms attack the Internet in the distributed fashion. In this paper, we propose a design of distributed worm detection system to overcome the inefficiency. Existing distributed network intrusion detection systems cooperate with each other only with their own information. Unlike this, in our proposed system, a worm detection system on a network in which worms select targets and a worm detection system on a network in which worms propagate themselves cooperate with each other with the direction-aware information in terms of worm's lifecycle. The direction-aware information includes the moving direction of worms and the service port attacked by worms. In this way, we can not only reduce false positive rate of the system but also prevent worms from propagating themselves across the Internet through dispersing the confirmed worm signature.

전관 방송 시스템에서 장비 노후화나 건물 공사 시 작업자의 실수 등의 원인으로 고장이 발생한 경우 방송이 불가능 하게 된다. 본 연구에서는 이러한 상황에서도 방송 할 수 있는 시스템을 설계하였다. 방송 서비스는 메인 방송 장치를 사용하여 작동하며, 로컬 방송 장치는 로컬 지역에서만 별도로 작동한다. 메인 방송 장치가 작동 불가능하게 되면, 메인 컨트롤러에 의해 백업 된 데이터에 기초하여 로컬 방송 장치 중에서 가장 우선순위가 높은 장치를 활성화시 킨다. 본 논문은 기존의 비상 방송 장치 이중화 방법보다 개선 된 방법을 제안한다. 기존 방식은 정상 상태에서 대기 장비를 사용할 수 없었으나 제안 된 방법에서는 대기 장비를 정상 상태에서 로컬 방송 장비로 사용할 수 있다. 이 방식 은 값 비싼 장치의 중복 구성으로 인한 자원 낭비를 최소화하면서 안정적인 시스템의 운영이 가능하다.

In the case of a failure due to equipment deterioration in the public address system or a worker's mistake during construction, broadcasting becomes impossible. In this situation, we have designed a more advanced management broadcast system that can broadcast. The broadcasting service is operated using main broadcasting device, and local broadcasting device operates separately only in the local area. If the main broadcasting device becomes inoperable, the procedure for transferring the control activates the device with the local broadcasting devices based on data backed up by the main controller. This paper proposes an improved method of the conventional emergency broadcasting device duplication method. The existing method could not use the standby equipment in the normal state, but in the proposed method, the standby equipment can be used as local broadcasting equipment in usually. This method enables stable system operation while minimizing resource waste due to redundant configuration of expensive devices.

Recently, cloud computing technology has been rapidly growing faster, offering cloud-based human activity recognition applications with lower latency. In this paper, we design and implement a new distributed driver activity recognition system (DHAR). The proposed distributed system absorbs a more significant number of input sensor data from humans with a lightweight model that provides high accuracy for driver activity recognition. In addition, our model has employed the entire convolution network – Long Short-term Memory (FCN-LSTM) to predict human activities of a total of 6 classes such as walking, walking upstairs, walking-downstairs, sitting, standing, and laying. We evaluate the proposed system using a well-known UCI-HAR opensource dataset containing a collection of smart-phones data for 30-subjects while performing various activities using a smartphone. We used various Amazon cloud computing services for the deployment of the proposed architecture. The experimental results show that the proposed architecture improves end-to-end latency by 2.7 times compared to the traditional architecture.

최근 심부 광물자원 및 지진, 화산과 같은 심부 지각 활동에 대한 정보를 얻기 위한 심부 전기탐사의 적용성이검토되고 있다. 이에 이 연구에서는 고효율 심부 전기탐사를 실현하기 위한 분산계측 시스템을 개발하고 검증하였다. 최신 전기전자 기술을 도입하여 개발된 이 시스템은 다음과 같은 특징을 갖는다: 1) 대전력 송신과 수신기에서의 고정밀 계측이 가능하다; 2) 펌웨어 프로그래밍을 통한 시스템 동작의 허용범위가 높아 기능 개선 및 추가가 용이하여 전기탐사 이외의 다양한 정밀 계측 응용에 적용이 가능하다; 3) 작고 가벼운 외형 및 저전력, 모듈화 설계로 현장 운용 시우수한 효율성과 유지보수성을 확보하였다. 개발 시스템의 검증을 위해 우선 전라북도 부안군 일대에서 480 m 측선을 설치 후 일선현장에서 보편화되어 운용되고 있는 상용 중앙집중형 전기탐사 시스템과 동일 조건에서의 비교실험을 하였고, 이 후 심부 전기탐사의 적용가능성을 확인하기 위해 험준한 태백산 지역의 4 km 측선에서 탐사를 하여 효율적인 탐사가 가능함을 확인하였다.

Recently, the necessity of a DC resistivity survey for deeper parts has increased for the purpose of locating mineral resources and investigating earthquakes and volcanic activities. Accordingly, we developed and verified a distributed acquisition system to implement efficient deep DC resistivity surveys. The main features of our system adopting state of the art of electric and electronic technologies are described as follows: 1) high-power transmission and high-precision measurement is possible; 2) broad functional implementation by firmware programming guarantees the scalability and applicability for various geophysical high-precision measurements; and 3) it has high efficiency and maintainability in field operations due to its small size, light weight, modular design, and low power consumption. The system was verified through comparison with a commercial system under the same conditions along the 480-m survey line. After the verification, a large-scale survey was successfully carried out along the 4-km survey line at Mt. Taebaek.

The electrical fire is one of the high rates among fire occurences. The electrical fire is reported as the highest rate with 23% of total fire occurence rate, and the industrial facility fire is known as the second highest rate with 17.3% of total fire rate. This study is focused on the development of more effective self triggered fire extinguishing system to protect the fire of high value facility and equipment such as electrical distributed system. The fire extinguishing raw material is the condensed aerosol which does not yield the corrosion and fault of fire equipments and facilities. The fire at the supply system of electricity such as electrical distributed system produce the large loss of not only the whole system but also the other fields relating to the distributed system. The electrical system therefore should be guaranteed for both safety and supply capacity together with the fire occurrence and earthquakes. It is accordingly to be triggered for fastest fire suppression and prepared for the minimum loss at the emergent situation. Based on these circumstances the fire extinguishing system of condensed aerosol has been known for the very effective measure particularly at the small size of enclosure. The self triggered system of condensed aerosol must however have the requirement of fast response capability. The heat type fire extinguishing system has not been enough to sense the total thermal value inside the enclosure. This paper is therefore to describe the advancement of self triggered smoke type extinguishing system of aerosol including more accurate and fast capability. The developed smoke type system provide the fast automatic suppression method with accurate test results for the electrical distributed system.

데이터베이스는 정보 시스템의 핵심 기술로서 많은 양의 데이터를 효율적으로 구성하고 저장하는 역할을 한다. 본고에서는 먼저 데이터베이스 기술을 위한 분산 시스템의 데이터 일관성 및 보안 요구 사항을 분 석하고자 한다. 데이터 공유 및 리소스 공유에 있어 NewSQL 데이터베이스의 장점을 소개하고 분산 시 스템 설계를 기반으로 하는 NewSQL 데이터베이스의 핵심 기술을 분석한다. 분산 스토리지 엔진, 실시간 분석 및 조회 엔진, HTAP 하이브리드 워크로드 아키텍처, 분산 트랜잭션 등은 예로 들 수가 있다.

Due to changes in the distribution system and increased demand for renewable energy, interest in technology to increase the limit capacity of distributed energy grid connection using grid flexible resources is also increasing. Recently, the distribution system system is changing due to the increase in distributed power from renewable energy, and as a result, problems with the limited capacity of the distribution system, such as waiting for renewable energy to connect and increased overload, are occurring. According to the power generation facility status report provided by the Korea Power Exchange, of the total power generation capacity of 134,020 MW as of 2021, power generation capacity through new and renewable energy facilities is 24,855 MW, accounting for approximately 19%, and among them, power generation through solar power accounts for a total portion of the total. It was analyzed that the proportion of solar power generation facilities was high, accounting for 75%. In the future, the proportion of new and renewable energy power generation facilities is expected to increase, and accordingly, an efficient operation plan for the distribution system is needed. Advanced country-type NWAs that can integrate the operation and management of load characteristics for each line of the distribution system, power distribution, regional characteristics, and economic feasibility of distributed power in order to improve distribution network use efficiency without expanding distribution facilities due to the expansion of renewable energy. An integrated operating system is needed. In this study, in order to improve the efficiency of distribution network use without expanding distribution facilities due to the expansion of renewable energy, we developed a method that can integrate the operation and management of load characteristics for each line of the distribution system, power distribution, regional characteristics, and economic feasibility of distributed power. We want to develop an integrated operation system for NWAs similar to that of advanced countries.

본 논문에서는 분산무기체계와 작전통제소를 연동하여 탄도탄 요격시험을 수행하기 전 체계통합점검을 하는 방법에 대해 제안한다. 요격시험에 필요한 체계통합점검의 점검항목 을 확인하고 작전통제소와 연동하여 체계통합점검을 수행하는 방법과 작전통제소를 대신하 여 큐잉정보를 모의하는 큐잉정보 시스템을 이용하여 체계통합점검을 수행하는 방법을 제 안한다. 이 논문에서 제안한 요격시험을 위한 체계통합점검 방법을 통해 유사무기체계의 요격시험에 필요한 체계통합점검 수행 시 유용하게 활용될 수 있을 것이다.

In this paper, it is proposed to carry out a system integration inspection before conducting the ballistic intercept test in conjunction with the distributed weapon system and the operational control center. It is required to identify the system integration inspection items required for the ballistic intercept test, to carry out the system integration inspection in conjunction with the operational control center, and with cueing information system that simulates cueing information on behalf of the operational control center. The system integration inspection method proposed in this paper may be useful for carrying out inspection of the ballistic intercept test of similar weapon systems.

위치기반 서비스란 휴대폰과 같은 모바일 단말기 속에 위성 항법장치(GPS)와 연결되는 칩을 부착하여 위치추적 서비스, 공공안전 서비스, 위치기반 정보 서비스 등 위치와 관련된 각종 정보를 제공하는 서비스를 일컫는다. 그리고 클라우드 컴퓨팅이란 개인용 컴퓨터 또는 기업의 서버에 개별적으로 저장해 두었던 자료와 소프트웨어들을 클라우드 클러스터로 구축하여 필요할 때 PC나 휴대폰 같은 각종 단말기를 이용하여 원격 작업을 수행할 수 있는 환경을 의미한다. 본 논문에서는 구글의 연구로부터 시작된 클라우드 컴퓨팅 기술에 주목하고 클라우드 컴퓨팅 환경을 위한 대용량 이동 객체의 정보를 저장하고 질의하는 시스템에 대하여 연구하였다. 그리고 위치 기반 서비스를 위한 대용량 이동객체에 대하여 효율적인 질의를 수행할 수 있는 저장 구조를 제안하였다. 본 논문에서 제안한 방법을 적용한 시스템의 효율성을 증명하기 위해 저장 및 질의 성능을 다양한 측면에서 실험하고, 실험 결과를 다른 분산처리 시스템과의 비교하여 성능을 입증하였다.

The location-based service is referred to as the service for providing various types of information regarding such as the location-tracing service, the public-safety service and the location-based information service by attaching chips connected with the GPS to the mobile phone. In addition, cloud computing means the environment which makes it possible to carry out remote operations by establishing cloud clusters with the data and software which have been individually stored in personal computer or corporate servers and using devices such as personal computers and cellular phones whenever it is necessary. Throughout this paper, the cloud computing technology which originates from the research by Google the system has been focused on and the system for storing a large volume of information for moving object and making query for cloud computing environment has been studied. Besides, the storing structure for executing efficient query regarding the high-capacity mobile devices for the location-based service has been suggested. In order to prove the efficiency of the system with the application of the method suggested in this paper, the storage and qualitative functions have been experimented in various aspects and compared with other distributed processing system's performance.

초고해상도 콘텐츠는 파일 크기가 매우 크기 때문에 기존의 부호화 기술로는 네트워크를 통해 전송하는 것 이 불가능하다. 고효율의 부호화 기법인 HEVC를 이용하면 네트워크 전송이 가능하나 압축시간이 많이 필요하기 때 문에 분산 트랜스코딩 시스템이 필요하다. 분산 트랜스코딩 시스템은 데이터를 분산하여 저장한 뒤 다수의 노드를 이용하여 부호화한다. 그러나 분산 트랜스코딩 시스템은 분산된 정보가 노출되거나 내부관리자의 공격에 취약하다는 문제점이 있다. 본 논문에서는 초고해상도 콘텐츠를 트랜스코딩 할 때, 분산 트랜스코딩 시스템의 기밀성이 보장되지 않는다는 문제점 을 해결하고자 한다. 우리는 SNA를 이용하여 데이터 노드에서 HEVC로 부호화된 콘텐츠 데이터를 비밀분산기법을 통 해 암호화하여 저장했다. 결과적으로 안전한 분산 트랜스코딩이 가능하고, 내부관리자의 공격을 방지할 수 있다.

Ultra high-resolution content, the file size is very large, therefore existing encoding techniques, it is not possible to transmit via the network. Efficient use of the network encoder HEVC corporation can be transferred. Compression requires a lot of time because it requires a distributed transcoding system. Distributed transcoding system is a distributed data store, and then encoded using a large number of nodes. The disadvantage of distributed transcoding system for distributed information is exposed or vulnerable to attack by internal managers. In this paper, when the super high definition content transcoding, distributed transcoding system does not guarantee the confidentiality of the problem to solve. We are using SNA, HEVC encoded content data encrypted using the secret distributing scheme was. Consequently, secure shared transcoding is possible, the internal administrator could prevent the attack.