• 감성과학
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• 제25권4호
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• pp.107-118
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• 2022

Human can rapidly detect and deal with dangerous elements in their environment, and they generally manifest as attentional bias toward threat. Past studies have reported that this attentional bias is affected by anxiety level. Other studies, however, have argued that children and adolescents show attentional bias to threatening stimuli, regardless of their anxiety levels. Few studies directly have compared the two age groups in terms of attentional bias to threat, and furthermore, most previous studies have focused on attentional capture and the early stages of attention, without investigating further attentional holding by the stimuli. In this study, we investigated both attentional bias patterns (attentional capture and holding) with respect to negative emotional stimulus in neurotypical adults and adolescents. The effects of anxiety level on attentional bias were also examined. The results obtained for adult participants showed that abrupt onset of a distractor delayed attentional capture to the target, regardless of distractor type (angry or neutral faces), while it had no effect on attention holding. In adolescents, on the other hand, only the angry face distractor resulted in longer reaction time for detecting a target. Regarding anxiety, state anxiety revealed a significant positive correlation with attentional capture to a face distractor in adult participants but not in adolescents. Overall, this is the first study to investigate developmental tendencies of attentional bias to negative facial emotion in both adults and adolescents, providing novel evidence on attentional bias to threats at different ages. Our results can be applied to understanding the attentional mechanisms in people with emotion-related developmental disorders, as well as typical development.

• Journal of Positioning, Navigation, and Timing
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• 제1권1호
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• pp.51-57
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• 2012

In this paper, design of an error model is presented in which the bias characteristic of the MEMS IMU is taken into consideration for performance enhancement of the MEMS IMU-based GPS/INS integrated navigation system. The drift bias of the MEMS IMU is modeled as a 1st-order Gauss-Markov (GM) process, and the autocorrelation function is obtained from the collected IMU data, and the correlation time is estimated from this. Prior to obtaining the autocorrelation function, the noise of IMU data is eliminated based on wavelet. As a result of simulation, it is represented that the parameters of error model can be estimated correctly only when a proper denoising is performed according to dynamic behavior of drift bias, and that the integrated navigation system based on error model, in which the drift bias is considered, provides more correct navigation performance compared to the integrated navigation system based on error model in which the drift bias is not considered.

• 한국직업건강간호학회지
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• 제25권3호
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• pp.199-207
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• 2016

Purpose: The purpose of this study was to identify the obesity stress, weight bias and health care on Body Mass Index (BMI) in soldiers of non-combat area and to provide data for improving the quality of their life. Methods: This research involved 165 soldiers working in non-combat area. Data collection was conducted from November 1 to 20, 2015. Statistical analysis of the collected data were t-test and ANOVA, $Scheff{\acute{e}}$ method post hoc analysis, Pearson's correlation coefficients, and multiple liner regression using IBM SPSS 22.0. Results: The mean score of obesity stress was moderate ($19.05{\pm}5.28$). The mean score of weight bias was 69.03 and health care was 2.41 points. There are a positive correlation between obesity stress and BMI (r=.19, p<.05). Weight bias (r=-.19, p<.01) and health care (r=-.26, p<.01) among the subjects had negative correlations with BMI. In a multiple liner regression, obesity stress (${\beta}=.18$, p<.05), health care (${\beta}=-.18$, p<.05) were associated with BMI. Conclusion: Based on the findings that obesity stress and health care influence BMI, there is a need to control stress and to properly set proper guidelines on health care for soldiers.

• 디지털융복합연구
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• 제16권1호
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• pp.251-262
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• 2018

본 연구는 남자 대학생들의 에이즈 지식, 자아존중감, 자기통제감, 낙관적 편견이 콘돔 사용에 미치는 영향을 조사하고자 시행되었다. B시 일 종합대학교의 남학생 323명을 편의표집 하여 빈도분석과 기술통계량, ANOVA, Pearson 상관관계, 다중회귀분석으로 분석하였다. 대상자들은 에이즈 감염에 대한 낙관적 편견이 있으며, 에이즈 지식, 자아존중감, 자기통제감 점수도 각각 높게 나타났다. 자아존중감과 자기통제감, 자기통제감과 낙관적 편견, 자기통제감과 고정적인 성 파트너와 성관계 시 콘돔 사용, 비고정적인 성 파트너와 성관계 시 콘돔 사용과 고정적 성 파트너와 성관계 시 콘돔 사용이 정적 상관관계를 보였다. 고정적인 성 파트너와 성관계 시 콘돔 사용에 대한 예측변수로 자아존중감, 자기통제감이 유의하게 기여하는 것으로 나타났다. 향후 에이즈 감염 예방을 위한 콘돔 사용 관련 변수에 대한 반복 연구와 다양한 집단의 후속 연구를 제언한다.

• 부모자녀건강학회지
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• 제22권1호
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• pp.22-29
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• 2019

Purpose: This study was conducted to identify the intention of visiting obstetrics and gynecology of female college students by considering their perception and optimistic bias. Methods: The study included a total of 135 female college students under the age of 25. The data collection period is a descriptive research study conducted online from April 8, 2019 to April 16, 2019. The collected data were analyzed using the correlation of t-test, ANOVA, Pearson's correlation and multiple regression using SPSS 20.0. Results: The degree of intention of behavior for visits to obstetrics and gynecology was $3.10{\pm}1.06points$ on average. Intention of behavior for visits to obstetrics and gynecology had significant variance depending on sexual experience (t=3.09, p<.001). The intention of behavior for visits to obstetrics and gynecology had positive correlations with the cognition of visits to obstetrics and gynecology (r=.422, p<.001), the optimism bias (r=.419, p<.001). Influence factors emerged the optimism bias, cognition and sexual experience with explanatory power of 30.4%. Conclusion: The results of this paper can be used to prepare the basic data for the development of educational programs to promote preventive gynecological visits of female college students. Through this, the preventive screening rate, the quality of reproductive health in women's lives.

• 한국산업융합학회 논문집
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• 제26권2_2호
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• pp.293-306
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• 2023

The purpose of this study is a descriptive research study to analyze the factors that affect Christians' COVID-19 preventive behavior. The subjects of the study were 262 adult Christians, and the data collected were using SPSS 25.0 and AMOS 21.0 programs. As a result of the study, the subject's religious maturity level was 4.21 ± .55 points out of 5 points, COVID-19 stress was 2.86 ± .73 points out of 5 points, optimism bias was 2.94 ± 1.26 points out of 7 points, and COVID-19 preventive health behavior was 4 points. The total score was 3. 54 ± . 44 points. As a result of the correlation analysis of the subject's religious maturity, COVID-19 stress, optimistic bias, and COVID-19 preventive health behaviors, COVID-19 preventive health behaviors were faith maturity (r=.156, p=.012), COVID-19 stress (r=.216, There was a positive correlation with optimism bias (r=174, p=.005). In conclusion, it can be said that the higher the religious maturity, the higher the COVID-19 stress, and the higher the optimistic bias, the better the preventive health behavior of COVID-19, and the explanatory power of the overall model was 9.4%. In the post-COVID-19 era, it is necessary to develop educational programs that can prevent infectious diseases and promote health in the community.

• 한국통신학회논문지
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• 제33권6C호
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• pp.505-511
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• 2008

위성 항법 시스템은 (global navigation satellite system, GNSS) 통신 물리계층으로 직접 수열 확산 대역 (direct sequence/spread spectrum, DS/SS) 시스템을 사용하고 있다. DS/SS 시스템은 확산된 정보를 복원하기 위해 한 칩 (chip) 또는 그 이하로 동기를 맞추는 획득 단계와 정확한 동기를 결정하고 유지하는 추적 단계를 수행한다. 가장 널리 알려진 추적 기법은 상관 값의 대칭성을 이용해 부호를 추적하는 $\Delta$-DLL이다 (single delta delay lock loop). 여기서, $\Delta$는 이른-늦은 상관 값의 상관 시간 옵셋 간격을 뜻한다. $\Delta$-DLL은 이상적인 환경에서 최적 부호 추적 기법이다. 그러나 이 기법은 다중경로 환경에서 상관 함수의 대칭성이 깨짐으로 인해 판별기 출력이 비대칭으로 나타나기 때문에 큰 추적 편이를 갖는다. 추적 편이는 정착한 동기 시점과 추적이 완료되어 결정한 동기 시점의 차이를 의미한다. 이러한 추적 편이를 감소시키기 위한 기법으로 작은 $\Delta$를 사용한 $\Delta$-DLL과 두 개의 $\Delta$-DLL을 조합한 ${\Delta}^{(2)}$-DLL이 (double delta DLL) 제안되었다. 그러나 두 기법 모두 여전히 추적 편이가 존재하며, 작은 $\Delta$를 사용하기 때문에 추적 단계의 동적 영역이 줄어들어 정확한 획득 단계가 요구되는 단점을 갖고 있다. 본 논문에서는 추적 편이를 효과적으로 줄이면서도 정확한 획득 단계가 요구되지 않는 상관 값의 최대 기울기 변화에 기반한 추적 편이 감소 기법을 제안한다.

• Journal of Acupuncture Research
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• 제34권4호
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• pp.159-168
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• 2017

Background: The aim of this study was to identify well-supported evidence to aid medical treatment of temporomandibular disorder or dysfunction (TMD) in Korea by analyzing the correlation between TMD and body posture in recent international research. Methods: We looked for recent clinical studies on TMD and body posture in Korean and English databases. Bias risk was estimated using the Risk of Bias Assessment Tool for Non-Randomized Studies and the Cochrane Risk of Bias Tool for assessing randomized controlled studies. Results: Nine clinical studies, published between 2005 and 2017, were analyzed. In each, TMD was assessed using the American Academy of Orofacial Pain diagnostic criteria and the Research Diagnostic Criteria for Temporomandibular Disorder. Six studies evaluated body posture using photographs, four studies used stabilometry, and one used both photographs and stabilometry. Conclusion: Six of the nine studies found a correlation between TMD and body posture. Well-designed randomized controlled trials are needed to provide more data to assess the validity of this correlation.

• 한국수자원학회논문집
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• 제46권3호
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• pp.229-243
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• 2013

평창유역의 적설량을 모의하기 위하여 HSPF 모형을 적용하였다. 미래 적설량을 평가하기 위해 CIMIP3에서 제공하는 A1, A1B, B1의 온실가스 배출시나리오에 기반한 GCMs를 이용하였으며, HSPF 모형과 GCMs의 통계학적 오류를 최소화 하기 위해 편의보정(Bias-correction)과 시간적 분해모형(Temporal disaggregation)을 적용하였다. 모형의 검 보정 결과 모의된 유출량과 적설량의 경우 모형 효율이 높게 나타났으며, 특히 모형의 검정 후 상관계수를 분석한 결과 월별 유출량의 상관계수는 0.94로 나타났다. 월별 적설량, 또한, 상관계수가 0.91로 나타나 보정된 HSPF 모형이 평창지역에 대한 유출량과 적설량을 잘 모의하고 있는 것으로 판단된다. GCMs를 이용한 2018년 평창올림픽 경기장의 적설량을 분석한 결과 1월에는 17.62%, 2월에는 9.38%, 3월에는 7.25%의 적설량이 감소되는 것으로 나타났다.

• 한국음향학회지
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• 제15권2호
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• pp.49-54
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• 1996

본 연구에서 광-음향 상관기에 시간적분을 하는 소자로써 광굴절 크리스탈을 사용했다. CCD를 이용한 시간적분 상관기의 구조에서 출력 상관신호에는 바이아스가 내포되어 있어서 이 바이아스가 상관기의 실효 동적범위를 제한시킨다. 광굴절 크리스탈에서 공간변화를 받지 않는 광은 누적 바이아스를 출력하지 않으므로 광굴절 크리스탈을 시간적분 검출기로 이용하면 바이아스없이 상관신호를 기록 및 검출할 수 있었다. 또한 선형성, 동적범위 및 적분시간과 같은 중요한 특성을 제시하였다.