HVDC 슬립 온형 기중 종단접속함에 대한 열 영향 반영 DC 전계 특성 평가

권익수,황재상,구재홍,사카모토 쿠니아키,이방욱,Kwon, Ik-Soo,Hwang, Jae-Sang,Koo, Jae-Hong,Sakamoto, Kuniaki,Lee, Bang-Wook 한국전력공사 2015 KEPCO Journal on electric power and energy Vol.1 No.1

기중종단 접속함은 지중케이블과 가공송전선을 연결하기 위한 접속함으로써 옥외 변전소 등의 대기 중에 설치된다. 이는 21세기 핵심기술로 여겨지고 있는 대륙 간, 국가 간, 육지-섬을 잇는 HVDC 송전선로의 DC 그리드 송전망 형성을 위해 반드시 개발되어야 하는 전력기기이다. 그러나 AC용 접속함의 개발 사례는 다수 존재하는 반면, DC용 접속함의 개발 사례 및 기술은 일본과 중국 등에 일부 존재할 뿐 국내 기술은 부족한 실정이다. 따라서 본 논문에서는 기존 AC용 슬립 온형 기중 종단접속함을 초기모델로 선정하여 HVDC 전력기기로의 적용 가능성을 평가하였다. 먼저 실제 운전 시 기중종단 접속함 내 도체에서 발생하는 열에 의한 내 외부의 온도편차를 고려한 DC 전계해석을 수행하였으며, AC 전계분포 및 열 해석이 반영되지 않은 DC 전계분포와 비교하였다. 또한 DC 전계는 정상상태 뿐만 아니라 과도 구간도 포함하기 때문에 이를 고려한 전계해석을 수행할 필요가 있기 때문에 정상상태와 더불어 극성반전 후 전계분포 역시 비교, 분석하였다. 마지막으로, 기존 AC용 슬립 온형 기중 종단접속함 초기모델을 DC에 적용하기 위해 다양한 형상 변환을 통한 요소 설계를 수행하였다. 기중종단 접속함 구조 내 전계가 가장 집중될 것으로 사료되는 부분을 선정하여 그 지점들의 최대 전계강도 $E_{n.max}$와 $E_{t.max}$를 측정하였다. 해석 결과, 정상상태시 개선모델의 삼중점 최대 전계강도는 기준모델 대비 2.01% 개선되었으며, 연면 최대 전계강도는 기준모델 대비 36.68% 개선되었다. AC 전계해석 결과인 연면 전계강도 1.11 kV/mm보다는 33.3% 감소하였지만 삼중점 최대 전계강도 8.23 kV/mm보다는 아직 43.6% 크다는 점에서 부분적인 형상 변환이 아닌 DC 환경에 적합한 전혀 다른 근본적인 설계 개념의 변화가 반드시 필요할 것으로 사료된다. A outdoor termination installed at the outdoor substation is required to connect undergroud cables and overhead transmission lines. The joint box for AC transmission system is already developed and widely used to interconnect overhead and undergroud systems. But the development of the joint box for DC transmission system was only introduced from China and Japan, but theire developemnt staus and core technologies were not fully reported. In order to implement HVDC systems connecting ovehead transmission lines and undergroud cables, a outdoor termination should be developed, but the detailed specifications and information of this device were not reported. It is estimated that the development of the joint box for DC environment has some technical obstacles including insulating materials, electric field mitigation, thermal temperature rise, and space charge accumuations. Among this, the most important one is the DC elctrical insualtion design. Therefore, in order to investigate the DC elctrical insualton design of outdoor termination, the design of AC slip-on type outdoor termination is reffered, and DC electric field analysis performed to verify the possiblity of application of AC joint box into DC joint box. Especially for DC electric field analysis, temperature rise of insualting materials of a joint box was considered, because the conductivity of materials could be changed due to temperature rise. Furthermore, DC electric field analysis considering transinet state, and polarity reversal state were also investigated to verify which state is the most severe condition for the DC joint box. From the simualtion resulsts, it was shown that the value and the position of maximum electric field was obtained comparing AC state, DC state without temperaure rise, and DC state with temperaure rise. And it was confimred that severe DC electric field was observed considing temperaure rise. Finally, in order to reduce DC eletric field intensifation, different configuration of the joint box was applied and it was not possible to obtain satisfactory results. It means that the slight change of configuration of AC joint box was not the suitable soluton for DC joint box. It is essential to establish novel DC insulaton design skills and method for DC joint box to commercialze this product in the near future.

한국어 종결어미 ‘-네’에 대한 여전히 다른 생각

권익수(Kwon, Iksoo) 한국언어학회 2015 언어 Vol.40 No.3

This squib aims to show that Chung’s (2014) efforts to undermine Kwon’s (2013) counterargument against her original claim (Chung 2012) with regard to the identity of the sentence final suffix -ney are not successful. Her argument that -ney is not an epistemic modal marker loses its ground in that it DOES interact with epistemic modal adverbials, in that -ta does not belong to the same grammatical paradigm as ?ney (rather, -e/-a does), and in that -ney still accompanies with conceptual distancing. Furthermore, another main claim of Chung (2014), which is that -ney should be given an assertive mood marker indicating that the proposition in question is informative to the speaker, would not be convincing until Chung provides clearer explanation of relationship between the categories of assertive mood and of her own ‘spatial deictic tense,’ the latter of which she originally claims -ney belongs to. Based on the discussion, this squib suggests that -ney can still be claimed to be an epistemic modal marker with mirativity and further shows that its conceptual distancing actually accounts for some seemingly non-canonical examples in Chung’s accounts.

한의사의 의료영상장비 사용에 대한 방사선사의 인식도

최재호(JaeHo Choi),강기봉(GiBong Kang),김상현(SangHyun Kim),김태희(TaeHee Kim),김규형(GyooHyung Kim),이미화(MiHwa Lee),안중성(JungSeong Ahn),홍성완(SeongWan Hong),이재석(JaeSeok Lee),권익수(IckSu Kwon10),박재윤(JaeYoon Park) 대한방사선과학회 2017 방사선기술과학 Vol.40 No.1

한의사 의료영상장비 사용에 대하여 방사선사의 인식도를 알아보고자 대한방사선사협회 영상의학기술학회의 회 원을 대상으로 자체적으로 개발한 설문지를 통하여 설문조사를 하였으며 총 응답 515명, 부적격 응답 34명을 제외 한 481명의 설문을 바탕으로 연구하였으며 분석한 결과는 다음과 같다. 거주지, 근무기관, 학력에 따른 인식도 차이에서 통계적 유의성을 보이지 않았으나 고학력일수록 포괄적인 의료 영상장비의 사용에는 동의하는 경향이 있었다. 그러나 특수의료영상장비의 사용에는 반대하는 경향이 보였다. 성 별에 따른 인식도 차이에서는 남성보다 여성에서 한의사 의료영상장비 사용에 대하여 부정적 인식이 큰 것으로 나타났다. 특히 MRI나 CT, 초음파와 같은 특수의료영상장비를 이용하는 것에 대하여 남성보다 부정적인 경향이 나타났으며 이는 통계적으로 유의하였다. 연령에 따른 인식도 차이에서는 한의사의 의료영상장비 사용에 대하여 20 ∼30대는 부정적, 40∼50대는 중립적, 60대에서 긍정적으로 나타났으며 모든 문항에서 통계적으로 유의하였다. 근무경력에 따른 인식도 차이에서는 한의사의 의료기기 사용에 근무경력이 오래될수록 긍정적으로 나타났다. 특히 30년 이상의 근무경력에서 가장 긍정적 경향이 나타났으며 이는 통계적으로 유의하였다. 이번 연구를 통해 방사선사의 한의사 의료영상장비 사용의 인식을 알 수 있었으며, 이러한 연구 결과들은 앞으로의 국민 건강증진을 위한 방향성 제시에 기여할 것으로 생각된다. In order to examine how Radiological Technologists perceive the oriental doctor s use of Medical Imaging Equipment, surveys were conducted for the members of the Korean Radiological Technologists Association. The total number of respondents were 515 and 481, with 34 insincere responses removed caused of nonvalidated answer. The results of the analysis are as follows. Although there were no statistical significance in the difference in perception by location of residence, work place, and educational background, respondents with higher education showed a tendency to agree on the use of comprehensive medical imaging equipment, but tended to oppose the use of special medical imaging equipment. Differences in perception by gender showed a greater negative perception toward the oriental doctor s use of medical imaging equipment by women than men. In particular, women showed more negative tendency for oriental doctor s use of special medical imaging equipment such as MRI, CT, and ultrasound equipment compared to men, and this was statistically significant. The difference in perception by age showed that the oriental doctor s use of medical imaging equipment was negative in the 20∼30s, neutral in the 40∼50s, and positive in the 60s, which were statistically significant. The difference in perception by work experience showed that the longer the work experience was, the more positive it was toward oriental doctor s use of medical imaging equipment. Specifically, the most favorable tendency was found with work experience of more than 30 years, which was statistically significant. The results of this study revealed the Radiological Technologists perceptions on the oriental doctor s use of Medical Imaging Equipment and this can contribute to the direction of public health promotion in the future.

표어에 대한 개념적 혼성 분석 : “5분 먼저 가려다 50년 먼저 간다”

권익수(Kwon, Iksoo) 담화·인지언어학회 2013 담화와 인지 Vol.20 No.2

This paper explores the meaning of the Korean slogan Opwun mence kalyeta osipnyen mence kanta ‘one would leave the world 50 years earlier if he tries to go 5 minutes earlier,’ which urges drivers and pedestrians to observe traffic laws. This paper ponders on semantic contributions that individual constructs of the slogan make such as mence ka-‘go earlier’ and the adversative desiderative construction X?lyeta Y-hata ‘tries to X, but does Y.’ The construal of the slogan involves emergent semantics such as the reversed intentional structure; this cannot be accounted for only in terms of the meanings of individual elements of the slogan. To account for the emergent structure, this paper models the slogan’s conceptual structure, whose construal involves metaphoric blends, within conceptual blending theory.

Charlie Hebdo 만평에 나타난 인지 기제 분석

권익수(Kwon, Iksoo) 담화·인지언어학회 2015 담화와 인지 Vol.22 No.1

This paper explores political cartoons that appeared in the satirical French newspaper Charlie Hebdo before and after Islamic extremists’ attack on the cartoonists. I argue that cognitive mechanisms such as conceptual metaphor, metonymy, and blending play a crucial role in delivering intended meanings effectively. After briefly introducing the tragic incident that took place in Paris on January 5, 2015, this research shows that the embodiment of the conceptual metaphor ARGUMENT IS WAR underlies the outbreak of the incident. Then, this paper selects some political cartoons from Charlie Hebdo and analyzes them within a cognitive semantics framework. The analyses also include conceptual metonymies via which journalists are represented by means of a pencil, and conceptual blending that helps evoke implicatures more effectively than verbal modality. I discuss in further details how the cognitive mechanisms seamlessly work for the effective semantic construal. This paper also accounts for semantic elements that participate relevant frames that are evoked by the cartoons and the mapping structures. This case study backs up cognitive linguistics’ fundamental assumption that cognitive mechanisms substantially affect experiencers’ view of the world.

책임, 공감, 진심, 그리고 새로운 미래: 안철수의 대선출마연설문에 나타난 정치 프레임 분석

권익수 ( Ik Soo Kwon ) 한국외국어대학교 언어연구소 2012 언어와 언어학 Vol.0 No.57

The aim of this paper is to provide cognitive semantic accounts of values and frames that structure the values in Cheol-Soo Ahn``s declaration of the candidacy for president. This paper addresses what kinds of values he uses, how he frames and structures moral values and his political philosophy - responsibility, empathy, sincerity, and new future - and how all these frames conspire to successfully build the candidate``s self-image in the speech. I explain how the candidate optimizes framing of the speech by providing in-depth cognitive semantic analyses using conceptual metaphor theory, frame semantics and conceptual blending theory. The explanation includes discussions of how the frames of his speech best-fits Ahn``s sincere, innovative, non-authoritative self-image.

HVDC MI-PPLP 케이블 접속함 절연설계를 위한 외부인가전계 및 온도 조건을 고려한 MI-PPLP 및 MI-Kraft 도전율 측정 연구

권익수(Ik-Soo Kwon),이호영(Ho-Young Lee),최인석(In-Seok Choi),이방욱(Bang-Wook Lee) 대한전기학회 2017 대한전기학회 학술대회 논문집 Vol.2017 No.7

XLPE 케이블 접속함 모델에 대한 DC 및 SI 중첩 전계 특성 연구

권익수(Ik-Soo Kwon),사카모토 쿠니아키(Kuniaki Sakamoto),홍동석(Dong-Suk Hong),김성중(Seong-Jung Kim),장태인(Tae-In Jang),이방욱(Bang-Wook Lee) 대한전기학회 2016 대한전기학회 학술대회 논문집 Vol.2016 No.7

햇볕 정책, 그리고 개념적 은유

권익수(Kwon, Iksoo) 담화·인지언어학회 2015 담화와 인지 Vol.22 No.3

This paper explores conceptual metaphors and their rich inferences embedded in Sunshine Policy, which had been conducted by the South Korean government toward North Korea. The policy is intriguing in that its motive comes from Aesop’s fable ‘The Sun and the Wind.’ This paper decomposes conceptual metaphors of the fable that are conspired to effectively support the policy maker’s intention in detail by explicating salient conceptual metaphor systems including their ontologies and inferential patterns. To support the claim that conceptual metaphors are not restricted to linguistic realizations, but pervade human beings’ everyday cognitive activities, this paper brought significant evidence of policy makers’ quotes which naturally reflect their ways of conceptualization of the South Korea’s political situation with relation to the other Korea. I also model the symmetric structures of the involved conceptual metaphors within cognitive semantics accounts such as conceptual metaphors and metonymies.

Commitment and prediction: A cognitivist approach to I promise and I guarantee constructions

Iksoo Kwon(권익수),Hanbeom Jung(정한범),A Young Kwon(권아영),Ji-in Kang(강지인),김일규(토론자) 담화·인지언어학회 2022 담화·인지언어학회 학술대회 발표논문집 Vol.2022 No.4