VI 공간벡터와 관련한 유도전동기의 Direct Control 분석

이완수(Wansoo Lee),오성업(Sungup Oh),박상은(Sangun Bark),백동기(Dongki Back),성세진(Sejin Sung) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11

In this paper a theoretical formulation of the direct control relating the action exerted by the inverter space vectors on the stator flux and the torque of Induction motor is analyzed. From the equation the scheme of the inverter switching is proposed and influence of the stator flux and the electromagnetic torque in each switching pattern is also analyzed.

지역일간지 경제뉴스 평가와 모델 탐구 : 부산 지역일간지 경제뉴스 내용과 형식에 대한 전문가 의견을 중심으로

이완수 ( Wansoo Lee ) 서강대학교 미디어융합연구소 2020 미디어융합연구 Vol.28 No.0

This study suggested a desirable economic news model through quality assessment of the form and contents of daily newspaper economic news in Busan. In-depth interviews were conducted with local journalists who subscribed to the Busan Daily newspaper to diagnose problems in the quality of local daily newspaper economic news, and suggested an economic news model to appeal to readers. As a result of in-depth interviews, this paper found data-based news, policy-driven agenda, lack of readability of articles, weakness of attention to photographs, lack of department store information, lack of company-related articles, lack of consumer-oriented articles, and lack of field articles, etc in the regional daily economic news report. Based on these findings, this study aims to provide an economic news model that can approach readers in terms of contents, such as company-oriented model, microeconomic model, life-oriented model, issue-based model, human story model, knowledge-based model, and field-based model and an open-space model. In terms of form, the magazine-based editorial model, soft-model article model, and visual editorial model were suggested as alternatives. The role of the economic public sphere in the community was discussed based on the regional daily economic news model.

'무엇'에서 '언제'로 : 벡터자기회귀모형을 통한 경제현실, 경제보도, 경제인식 간상호영향의 시간차 탐구

이완수(Wansoo Lee),노성종(Sungjong Roh) 한국언론학회 2008 한국언론학보 Vol.52 No.5

When do the inter-influences among the real-world economy, economic news, and mass economic judgments occur and disappear? In order to solve the conundrum, the present study has employed two respective measures representing economic reality, news reporting, and rating of public. Also the study has compared the two different period of regimes of South Korea, the kim Dae-Jung and the Roh Moo-Hyun governments, which are presumed to have distinct economic structure, press-government relationship, and public opinion climate. Utilizing Vector Autoregressive time series analysis, the study found that ① media malady, the effect of economic news coverage on the state of economy, took 2 months to appear and lasted a month, ② framing effect, the influence of economic news on the economic judgment of general public, also emerged in 2 months and had a month of duration, ③ it took a month for economic reality to be reflected on the economic news coverage and maintained a month as well for both the Kim and Roh administration, and ④ clear differences were not found between two period of regimes in terms of temporal gap of tripartite relationships. Based on these findings, the study suggests that the research with respect to when the effect of communication occur and disappear are required to be scrutinized in future studies in media effects beyond traditional concerns of the field that merely have been asking what the effect of communication is.

‘메멘토 모리(Memento Mori)’의 정치학

이완수(Wansoo Lee),박재영(Jaeyung Park),노성종(Sungjong Roh),이수미(Sumi Lee),강충구(Chungku Kang) 한국언론학회 2009 한국언론학보 Vol.53 No.5

Obituaries are not only mere a reporting system informing anyone’s death, but also the symbolic system that is both reflecting and constructing the power relationships in society. Based on the argumentation, we conducted content analysis of obituaries of a Korean newspaper, Joongang Ilbo, called 〈Life and Memory〉. In particular, we have observed distributions of the departed’s gender, social value, and social status appeared in obituaries. The results show that obituaries are inclined to report the death of male and power elite who had particular jobs, birthplaces, and top-notch colleges more frequently. Also obituaries are found to lean toward to more focus on the individual achievement than contribution to society of the deceased. The findings indicate that obituary is a product manufactured by power relationships in a given society rather be limited to the pure reporting of anyone’s death to general public. The implications are discussed and directions for future research are suggested.

경제 정보에 대한 비대칭적 반응

이완수(Wansoo Lee),박양수(Yangsu Park) 한국언론학회 2016 한국언론학보 Vol.60 No.1

범죄기사는 어떻게 의미구성되는가? : 포털 사이트 〈네이버〉에 실린 범죄뉴스 텍스트 구조분석을 통해

이완수(Wansoo Lee),송상근(Sang-geun Song) 한국방송학회 2020 방송과 커뮤니케이션 Vol.21 No.4

The portal site is the main repository and space for distributing crime news. The crime news on the portal site greatly affects peoples perception of crime reality. This study examined the semantic composition and characteristics of each crime type by analyzing the texts of crime news dealt with in the news portal 〈Naver〉. To this end, we conducted a qualitative method by extracting 791 articles related to four cases, including the abuse of Wonyoung (children’s name), the murder of Paldalsan, the sexual assault of a female teacher in the island village, and the (chaebol) Gapjil incident of Korean Airline, among the crime news published on the news portal site. The analysis was conducted focusing on the topic, headline and lead, and body text of the news. The analysis results are as follows. Child abuse cases reported in the media include demonization of stepmothers, inducement of national anger, citation of subjective / emotional expressions, and, in the case of murders represent image distortion, cruelty/violence, sensibility, and sexual assault case reported image distortion of the perpetrators (e.g. Chinese Koreans) with excessive sexual expression, emphasis on shock and curiosity, and the (chaebol) Gapjil incident reported with ignorance, bad princess image emphasis, and the chaebol IIs blatant attitude. We viewed portal crime news as a factor that directly affects the perception of crime reality, and suggested that a serious review of crime reporting norms in a digital environment is necessary.

수리이해능력은 코로나19 백신접종의향에 영향을 미치는가?: 백신 접종의 위험지각과 부정적 감정의 매개효과와 코로나 두려움과 정치성향의 조절효과를 중심으로

이완수(Wansoo Lee),최명일(Myungil Choi),안호림(Horim Ahn) 한국헬스커뮤니케이션학회 2024 헬스커뮤니케이션연구 Vol.23 No.2

This study investigated the influence of numeracy literacy on Intention to vaccinate against COVID-19 through a path analysis. Specifically, we focused on three research contents. First, we examined the direct effect of numeracy literacy on perception of vaccination risk. Second, we explored whether the indirect effect of numeracy literacy on intention to vaccinate against COVID-19 was mediated by perception of vaccination risk and negative feelings about vaccination. Finally, we analyzed whether the degree of fear of COVID-19 and differences in political ideology moderated the relationship between numeracy literacy, perception of vaccination risk, negative feelings about vaccination, and intention to vaccinate against COVID-19. Our findings revealed that higher numeracy literacy was associated with lower vaccine risk perception. Additionally, both “perception of vaccination risk” and “negative feelings about vaccination” significantly mediated the indirect effect, indicating that numeracy literacy influenced intention to vaccinate against COVID-19. Notably, the path between numeracy literacy, perception of vaccination risk, negative feelings about vaccination, and intention to vaccinate against COVID-19 was not significantly influenced by the degree of fear of COVID-19 or differences in political ideology. Further research is needed to fully understand the role of numeracy literacy in the vaccination decision-making process.

방송뉴스 언어 변경 제안을 둘러싼 게이트키핑 과정 : ‘방송말연구회’의 방송뉴스 언어제안에 대한 MBC 구성원들의 감정과 인식, 그리고 수용

이완수(Wansoo Lee),홍경수(Kyung Soo Hong),곽선혜(Sun Hye Kwak) 한국방송학회 2022 한국방송학보 Vol.36 No.6

경제루머의 보도기제: 미네르바 루머 메시지에 대한 언론의 재구성과 재해석

이완수 ( Wansoo Lee ),배재영 ( Jaeyoung Bae ) 성균관대학교 국정전문대학원 2015 국정관리연구 Vol.10 No.1

This study explored on how ``Minerva Rumor`` message constructed, spread, and regulated through medium such as independent internet media, general daily newspapers, business newspapers, magazines, and broadcastings Findings and implications suggests as follow. First, communication agent of rumors displayed differently according to creation, facilitation, diffusion and regulation. In the case of ``Minerva Rumor``, liberal daily newspapers played a leading role in the early stages, neutral and conservative daily newspapers appeared as rumor organizer after a certain point, and business daily newspapers participate as rumor organize. Second, local media performed as messenger for delivering rumors rather than as interpreter, evaluate or interpret the meaning of the rumors, and as protagonist, cease opinions about the problems. Third, local media leveled, added and modified ``Minerva Rumors`` through gate keeping as well as reconstructed and assimilated rumor messages to conform social cognition. Forth, local media played differently as auditor at early stage, as interpreter at the late stage in the process of spreading rumors. Fifth, local media did not work properly as watchdog to reduce uncertainty and ambiguity on the socio-economic issues. This study discussed on the implication of economy rumors in communication terms.

의제설정이론에서 그랜저 인과관계 모형의 방법론적 타당성 연구

이완수(Wansoo Lee) 한국언론학회 2009 커뮤니케이션 이론 Vol.5 No.2

이 글은 의제설정이론의 기존 연구방법을 검토하고, 동태적 분석을 통한 새로운 방법론적 대안을 제시한다. 의제설정 효과 연구에선 미디어, 수용자, 정부라는 세의제 간에 서로 영향을 주고받는다는 상호관계가 존재한다고 가정한다. 하지만 이러한 상호 인과관계의 영향력이 효과적으로 통제되지 않았다. 이러한 한계는 그동안 대다수 의제설정연구가 횡단면적 분석으로 이루어졌으며, 전후관계를 충분하게 고려하지 못했기 때문에 발생했다. 의제설정 과정은 본질적으로 정태적이기 보다는 시간에 따라 변화하는 동태적인 구조를 지닌다. 따라서 이 글은 의제설정 가설 검정에서 시계열 분석의 벡터자기회귀(VAR) 모형을 적용해 그랜저 인과관계가 존재하는지를 파악할 것을 제안한다. 벡터자기모형은 ① 변수 간의 관계를 일방향이 아닌 쌍방향적으로 규명할 수 있으며, ② 시간의 순서에 따라 의제설정효과의 전후관계를 밝혀낼 수 있으며, ③ 기본적 시계열분석에서 할 수 없는 세변수 이상을 동시에 측정할 수 있으며, ④ 의제의 속성별 특성을 구분해 측정할 수 있으며, ⑤ 개별적인 미시적 분석이 아니라 거시적이고 집합적인 차원에서 의제 간 상관관계를 밝혀낼 수 있다는 장점을 제공한다. 의제설정 연구에서 시간의 개념과 자기상관성을 고려해야 하며, 비선형성과 역동성 그리고 항상성의 관점에서 의제설정 가설을 보다 정확하게 검정해야 한다는 점을 중심으로 토론했다. Briefly reviewing the existing literature on agenda-setting theory, we suggest a multivariate time series approach for the dynamic analysis of agenda-setting hypothesis. It has been assumed in agenda-setting effects research that the media agenda has influence on both the audience and government agendas sequentially, and these two agendas also affect the media agenda reciprocally. Nevertheless, these non-recursive relationships have not been fully calculated due to methodological limitations. Most agenda setting research has been conducted based on cross-sectional data. Researchers have yet to determine conclusively the “before-after” relationships of how the media agenda influences the audience and government agendas respectively. The principle process of agenda-setting is not static but dynamic as researchers include time-lag lengths into their model. Thus, we suggest that communication researchers use the vector autoregression (VAR) model for their agenda-setting research since it has proven to be especially useful for describing the dynamic behavior of time-series agenda variables. Moreover, we contend that communication researchers should conduct Granger causality tests when they examine the agenda-setting hypothesis. The VAR model offers more accurate identification of the non-recursive influence of independent variables on the dependent ones. In addition, it can show the “before-after” relationship by incorporating time-lag lengths in the model. The VAR model can also include more than three variables in the time-series analysis, and it measures the influence of media agenda attributes. Overall, the VAR model holds advantages by using aggregate data at the macro-level to figure out the media coverage’s effect on both audience and government agendas after controlling the exogenous variables. From the multivariate time-series perspective, we discuss the possible contribution of the VAR model to the dynamic analysis of agenda-setting research.