원어민 대화 코퍼스와 고등학교 영어 교과서, 영어회화 교재에 나타난 담화표지어 ‘but’에 관한 비교 연구

최인지(Choi, In Ji) 언어과학회 2016 언어과학연구 Vol.0 No.77

Discourse markers (DMs), which guide the hearer toward the meaning intended by the speaker, consist of a functionally related group of expressions marking relations between units of discourse. Despite a growing interest in DMs, little research has concentrated on the analysis of their use in pedagogical settings. The present study compares the use of the DM but in an American conversation corpus, Korean high school English textbooks, and global ELT textbooks. The results from the analysis indicate that but is less frequently used in Korean textbooks than the corpus and ELT textbooks, and of all the thirteen functions of but about 66% of the uses represented in Korean textbooks consist of denial of expectation. Given that the appropriate use of DMs is essential to develop communicative competence, textbooks require more detailed and accurate presentations of how the DM but is used in real-life situations.

근칭 지시사의 개념적,절차적 의미 연구

최인지 ( In Ji Choi ) 대한언어학회 2013 언어학 Vol.21 No.1

The Linguistic Association of Korea Journal, 21(1). 155-184. Deixis is a phenomenon that has been studied from many different perspectives, and there are several issues in the debate on the meaning of it. Adopting the cognitive perspective of relevance theory, this paper applies the fundamental distinction between ‘conceptual’ and ‘procedural’ linguistic meanings to the question of how a variety of uses of proximal demonstrative in explained. It is proposed that proximal demonstratives ‘this’ in English and ‘I’ in Korean encode both pro-conceptual and prodcedural information which has a fundmantally pragmatic effect on interpretation as part of relevance-theoretic comprehension procedure. The procedural meaning encoded by proximal demonstratives intreucts the hearer to pay attention to the intended referent which is mist salient in the given context, while the pro-conceptual meaning of distance encoded by these demonstratives has to be contextually specified and directs the hearer‘s attention to the intended referent which is located as proximal on the distance scale. When the information encoded in the proximal demonstratives is superfluous during the phase of referent assignment, the extra effort required to process this information is justified by yielding an adequate ranges of additional inferential effects. An important implication of this study is that it offers a unified account of the spatio-temporal, discourse-deictic, anaphoric, and emotional uses of proximal demonstratives in terms of the relevance-theoretic notion of pro-conceptual and procedural meanings.

영국 영어 대화 코퍼스에 나타난 담화표지어 like 연구

최인지(Choi, In Ji) 새한영어영문학회 2022 새한영어영문학 Vol.64 No.4

스마트 그리드를 위한 원격검침 표준 프로토콜 인증 시스템 구축과 표준화에 관한 연구

최인지(In-Ji Choi),박병석(Byung-Seok Park),최효열(Hyo-Yeol Choi),명노길(No-Gil Myung),이상염(Sang-Youm Lee) 한국통신학회 2012 韓國通信學會論文誌 Vol.37 No.1B

본 논문에서는 스마트 그리드의 대표적 서비스인 원격검침을 위한 국제 표준 프로토콜 DLMS(Device Language Message Specifications)의 도입에서부터 정착까지 한국전력공사의 원격검침 인증 시스템 구축내용과 연구개발의 현황을 살펴보고자 한다. 현재 운용 중인 55만 저압고객에 대한 고속 PLC를 활용한 원격검침 시스템은 전력회사의 자체 통신 인프라를 활용하여 고속 데이터 전송이 가능한 시스템으로써, 전 세계적으로도 사업화에 빠르게 적용한 케이스이다. 여기에는 국제 표준 기반 원격검침 프로토콜을 탑재한 전자식 전력량계와 원격검침 핵심 기기 간 프로토콜의 적합성을 평가하기 위한 인증 시스템의 적기 구축이 큰 성공요인으로 볼 수 있다. 이처럼 한국전력공사에서는 DLMS 표준 기반 인증 시스템의 구축을 통하여 국내의 원격검침 서비스와 관련된 장비의 품질을 높이고, 시장의 확장을 선도하였으며, 스마트 그리드의 초창기 사업화 안착에도 많은 기여를 하였다. 또한, 전력선통신 분야 원천기술 개발의 지속 추진을 통한 각종 IPR의 확보 및 표준화 활동을 통하여 스마트 그리드 기술을 고도화하기 위해 많은 노력을 기울이고 있다. In this paper, we introduce the case study on the certificate system for Auto Meter Reading protocol, Device Language Message Specification which is a common language between metering devices and protocol with compatibility and conformance to the IEC 62056 standards. KEPCO has contributed to improve interoperability between different devices of multi vendors through the DLMS standard tests and led the smart metering industry in Korea. KEPCO has AMR system and successful business model for 550 thousands of households based on 24Mbps broadband powerline communications using its infrastructure. We have plan to continue on standardization activities stratagemically by participating in IEC working groups for the purpose of occupying the core technology of Smart Gird.

차세대 검침 기반구조를 위한 스마트 미터 집중기 제어 프로토콜의 구현과 성능분석

장순건(Soon-Gun Jang),최인지(In-Ji Choi),박병석(Byoung-Seok Park),김영현(Young-Hyun Kim),윤종호(Chong-Ho Yoon) 大韓電子工學會 2011 電子工學會論文誌-TC (Telecommunications) Vol.48 No.3

본 논문에서는 스마트 전력량계 집중장치와 검침서버간에 사용할 수 있는 개방형 프로토콜을 제안하고 성능을 분석하였다. 기존의 집중장치는 DLMS/COSEM 표준프로토콜 기반에서 스마트 전력량계에 대한 연결설정 및 데이터 수집절차를 수행한다. 하지만 수집된 자료를 전달할 때 필요한 집중장치와 검침서버간에는 표준화된 프로토콜이 없어 제품마다 다양한 방식으로 구현되고 있다. 본 논문에서는 집중장치와 검침서버간의 프로토콜로 기존의 DLMS/COSEM 표준프로토콜을 확장한 개방형 프로토콜인 Smart Meter Concentrator Control Protocol(SMCCP)를 제안하였다. 이것은 집중장치로 하여금 검침서버를 대신하여 검침자료를 수집할 수 있는 프록시모드 뿐만 아니라 검침서버와 전력량계간의 직접 통신이 가능한 릴레이모드도 설정하고 자료를 수집할 수 있는 기능을 제공하도록 설계된 것이다. 본 논문에서는 이의 동작을 실증할 수 있는 에뮬레이터 및 프로토콜 분석도구를 구현하였다. 또한 각 모드에 대한 동작과 성능을 평가하기 위하여 OMNET++기반의 시뮬레이터를 구현하여 모드별 평균세션유지시간 및 통신링크 점유율을 측정하고 비교하였다. In this paper, we propose an open protocol to be employed between a smart meter concentrator and a metering data collection server, and also evaluate its performance. Legacy concentrators performs the connection establishment and data gathering operations with DLMS/COSEM protocol standards. However, we note that there are no standardized protocols between the concentrator and the collection server, which inevitably conduces each commercial smart metering system to have its own proprietary protocol. In order to solve this problem, we propose an open protocol - Smart Meter Concentrator Control Protocol(SMCCP) by extending the existing standard protocol(DLMS/COSEM). The SMCCP can provide the proxy mode to enable efficient transmission between the concentrator and the data collection server. It also can support the relay mode to enable a direct communication between the data collection server and each far end smart meter. We also implement an emulator system and a protocol analyzer to provide its operation. In addition, we evaluate the session holding time and the link usage ratio in both relay and proxy modes with OMNET++ simulator.

22.9㎸ 지중 배전케이블에서의 통신신호 전송특성 연구

현덕화(Duck-Hwa Hyun),최인지(In-Ji Choi),강철신(Chul-Sin Kang),이영훈(Young-Hoon Lee) 한국정보기술학회 2006 한국정보기술학회논문지 Vol.4 No.4

The power Line are not designed for communications, hence their characteristics are quite different from those of communication media. One of the most peculiar aspects is the fact that noise is non-stationary, non white, and non-Gaussian. this paper, we tested the signal propagation characteristics of the 22.9 ㎸ underground distribution cable that have run high voltage and current. We injected the communication signal into the cable via a non-contacted coupler in the side of transmitter and measured the spectra of the signal in the side of receiver which was movable. The insertion loss of the non-contacted coupler into the cable is about 7 ~ 8 ㏈ less than that of laboratory test measurement. In the meantime the signal propagation characteristics is affected considerably by the joint of the power cables as well as by a distance. The result is significant that the test was conducted on the 22.9 ㎸ high voltage underground distribution line that have accommodated partially loads of Seoul city.

22.9㎸ 지중 배전케이블에서의 통신신호 전송특성 연구

현덕화(Duck-Hwa Hyun),최인지(In-Ji Choi),강철신(Chul-Sin Kang),이영훈(Young-Hoon Lee) 한국정보기술학회 2006 Proceedings of KIIT Conference Vol.2006 No.-

전력선은 통신을 위하여 설계된 것이 아니기 때문에 통신특성은 다른 매체와 상당한 차이를 가지고 있다. 그 특징 중 하나인 잡음특성을 보면 안정적이지 못하며 백색잡음도, 가우시안 잡음도 아닌 특성을 가지고 있다. 본 논문은 실제로 운영 중인 지하전력구 안에 포설된 22.9 ㎸ 지중 고압 배전케이블에 비접촉식 결합기를 결합하여 전송거리별 감쇠특성을 실험하였다. 송신단에서 신호발생기의 선호를 결합기를 통하여 전력선에 주입하고 수신단에서는 이를 스펙트럼분석기를 통해 측정함으로써, 배전용 지중케이블의 통신채널 특성을 분석하였다. 비접촉식 통신결합기를 실제 케이블에 연결 시 발생하는 삽입손실은 실험실 환경의 무 부하에서 시험한 값과 비교했을 때, 약 -8~-7㏈ 가량의 차이를 보였고, 또한 수신단을 움직여 실험한 결과 지중 배전선로의 채널 특성에는 송수신 단말간 거리 외에도 케이블 접속점(접지)으로부터 받는 영향도 무시할 수 없음을 확인할 수 있었다. 이는 국내외적으로 연구가 활발한 비접촉식 결합기를 국내에서는 최초로 실제의 지중 고압배전케이블에 적용하여 실험하였다는 데에 의의가 크다고 하겠다. The power Line are not designed for communications, hence their characteristics are quite different from those of communication media. One of the most peculiar aspects is the fact that noise is non-stationary, non white, and non-Gaussian. this paper, we tested the signal propagation characteristics of the 22.9 ㎸ underground distribution cable that have run high voltage and current. We injected the communication signal into the cable via a non-contacted coupler in the side of transmitter and measured the spectra of the signal in the side of receiver which was movable. The insertion loss of the non-contacted coupler into the cable is about 7 ~ 8 ㏈ less than that of laboratory test measurement. In the meantime the signal propagation characteristics is affected considerably by the joint of the power cables as well as by a distance. The result is significant that the test was conducted on the 22.9 ㎸ high voltage underground distribution line that have accommodated partially loads of Seoul City.

PLC 통신망 구축을 위한 선로 환경 측정 및 분석

강수경(Su-Kyung Kang),최인지(In-Ji Choi),박병석(Byung-Seok Park),박인수(In-Soo Park),이영훈(Young-Hun Lee),강철신(Cheoul-Shin Kang) 한국정보기술학회 2013 한국정보기술학회논문지 Vol.11 No.9

As the AMR business expanded, It is necessary to understand the PLC characteristics of the site to build the entire AMI system. This paper deals with channel and noise characteristics in details from 2MHz to 30MHz based on the field tests over low voltage power line in Korea grid. And we analyze frequency which is measured by distance and consumer characteristics and suggest the direction of demonstration system for the AMI system. Finally we suggest that the coverage of power line communication is under 50m, and if the distance is over 50m, then it is necessary to use the repeater which amplifies the signal. And we found that noise characteristic is more related to the customer type rather than distance.

디지털 통신 시스템의 효율적 성능 평가를 위한 Central-Moment Technique

이봉희(Bong-Hee Lee),장병관(Byung-kwan Jang),최인지(In-Ji Choi),황혜진(Hye-Jin Hwang),황인관(In-Kwan Hwang) 한국통신학회 2001 한국통신학회 학술대회논문집 Vol.2001 No.7

효율적 원격검침시스템 구축을 위한 집중장치간 연계통신 방법 설계 및 성능 테스트

임은혜(Eun-Hye Im),박병석(Byung-seok Park),김영현(Young-hyun Kim),최인지(In-Ji Choi),명노길(No-Gil Myoung) 대한전기학회 2010 전기학회논문지 Vol.59 No.12

AMR(Automatic Meter Reading)/AMI(Advanced Metering Infrastructure) is actively deployed all over the world. efficient, economical, stable and reliable system need to push forward the AMR/AMI business, so various researchs are in progress. In electric power system of domestic, a transformer is connected average twenty to thirty households and PLC is possible to communication within household connected same transformer. So if server and data concentrator unit(DCU) share circuit line through communication between transformers, communication network is able to efficient. Therefore we design new communication method between DCUs and test it and demonstrate the performance.