이지영 교수

Abstract The increased reliance on colistin for treating multidrug-resistant Gram-negative bacterial infections has resulted in the emergence of colistin-resistant Pseudomonas aeruginosa . We attempted to identify genetic contributors to colistin resistance in vitro evolved isogenic colistin-resistant and -susceptible strains of two P. aeruginosa lineages (P5 and P155). Their evolutionary paths to acquisition and loss of colistin resistance were also tracked. Comparative genomic analysis reveale

While deepfake has emerged as a severe issue in the multimedia environment, most studies examined text-based false claims, leaving the question of what unique features of video-based deepfake news deceives recipients and how it can be corrected. By conducting two online experiments, we study perceived source vividness as a psychological mechanism of the effect of AI-enabled deepfake news on news credibility and engagement intentions. Furthermore, we test how an inserted false-tag onto the fake n

Colistin-resistant mutants were obtained from 17 colistin-susceptible strains of Acinetobacter baumannii, Pseudomonas aeruginosa, Klebsiella pneumoniae, and Escherichia coli. The stability of colistin resistance in these mutants was investigated. Three of four colistin-resistant P. aeruginosa mutants recovered colistin susceptibility in colistin-free medium; however, colistin-susceptible revertants were obtained from only one strain each of A. baumannii and E. coli. No susceptible revertants wer

Our data suggest that individual two-component systems may not be essential for the acquisition of colistin resistance in P. aeruginosa. The PhoPQ two-component system may play a major role in the development of colistin resistance in our strains, but alternative or compensatory pathways may exist.

This study addresses how social media interaction affects misperceptions about COVID-19 via risk perceptions thereof and whether political orientation moderates the relationship. Using original two-wave panel survey data (<i>N</i> = 679), this study reveals that social media interaction increases misperception directly, as well as indirectly by reducing the extent of risk perception. The extent of risk perception is found to be a negative predictor of misperception. The deleterious role of socia

본 연구의 목적은 은퇴자들이 은퇴 후 삶을 영위하기 위해 필요한 은퇴자금의 충분성을 분석하고 그에 영향을 주는 요인을 확인하는 것이다. 은퇴자금 충분성을 평가하기 위해 은퇴소요자금의 산정을 통한 객관적 측면과 은퇴자 스스로 인식한 주관적 인지 측면으로 구분하였다. 또한 두 가지 측면으로 분석된 은퇴자금 충분성의 결정에 영향을 미치는 요인을 각각 규명하였다. 본 연구는 한국투자자교육재단에서 50세 이상 은퇴자들을 대상으로 2007년 실시한 은퇴자조사의 자료를 토대로 분석을 실시하였다. 그 결과 우리나라의 은퇴자들은 재정적으로 충분히 준비되지 못한 상태에 있다는 점이 확인되었다. 객관적 충분성 분석 결과에 따르면, 거주주택을 제외한 모든 자산을 은퇴자산으로 사용할 경우 23.2%의 은퇴자만이 현재의 지출을 지속적으로 감당할 수 있을 것으로 나타났다. 또한 조사대상자의 25.7%가 본인의 은퇴자금이 은퇴 후 생활을 영위하는데 있어서 충분할 것이라고 인지하고 있었다. 은퇴자금의 객관적 충분

The in vitro activity of colistin was evaluated against 215 nonduplicated Pseudomonas aeruginosa isolates, including 53 multidrug-resistant isolates, which were collected between 2006 and 2007 from nine tertiary care hospitals in Korea. Colistin-nonsusceptible P. aeruginosa (CNPA) isolates were genotyped using multilocus sequence typing. Sixteen (7.4%) CNPA isolates (minimum inhibitory concentration [MIC], >2 mg/l) were identified, including three resistant isolates. All but one of the MDR P. ae

Promoting physical activities is important for medical and functional recovery after stroke. Therefore, an accurate and convenient measurement of physical activities is necessary to provide feedback on functional status and effects of rehabilitative interventions. We assessed the feasibility, reliability, and validity of wearing accelerometers to monitor physical activities of stroke patients by estimating energy expenditure. This was a prospective observational quantitative study conducted in a

As smoking has emerged as a health-risk behavior, communication scholars and practitioners have put many efforts into finding out ways to achieve smoking cessation. In this research, participants (N = 57) were randomly assigned to a spatial augmented reality (SAR) condition (3D projection mapping) and 2D flat screen to be exposed to an anti-smoking message. This research provides insightful evidence that the effects of SAR on people’s behavioral intention to spread anti-smoking messages online c

긍정 심리학과 더불어 최근 관심이 증대되고 있는 긍정 조직학은 이전의 조직연구가 문제 규명 및 해결이라는 결함 중심적 관점에 치우쳐 있었음을 지적하면서 조직 현상을 폭넓게 바라보기 위한 새로운 렌즈로 긍정적 관점의 필요성을 강조하고 있다. 본 개관 논문에서는 긍정 조직학 관련 연구들의 현주소와 지향점을 세 부분으로 구성하여 살펴보았다. 첫째, 긍정 조직학 연구들을 ‘긍정’, ‘조직’, ‘학’으로 구분하여 각각이 의미하는 바와 관련 연구들을 개관하였다. ‘긍정’에서는 조직 장면에서의 개인과 조직의 긍정적 특성, 긍정적 상호작용, 긍정적 결과, 긍정성의 재정의 연구들을 다루었으며, ‘조직’에서는 긍정적 조직맥락의 영향 및 강점 중심적 조직변화에 대한 연구들을 소개하였다. ‘학’에서는 심리학과 조직행동학 관련 주요 학술지의 검색 결과를 통해 긍정 조직연구의 최근 경향을 살펴보았다. 둘째, 긍정 조직학이 조직을 바라보는 새로운 렌즈인가, 절대적 가치의 긍정성이 존재하는가, 누구를 위한 긍정

Recent studies have shown mixed findings regarding the relationship between network heterogeneity on social media and opinion polarization. Focusing on individual-level variables (i.e., individuals' political orientation, fear of a risky situation, and fear of an out-group), the objective of this study was to investigate opinion polarization over North Korean issues that have brought out threats to South Koreans and tangled with political orientations in the nation. Our analysis indicated that n