• Journal of Multimedia Information System
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• 제8권2호
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• pp.111-120
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• 2021

As recent virtual reality technologies provide a more natural three-dimensional interactive environment, users naturally learn to explore space and interact with synthetic objects. The virtual reality researcher develops a technique that realizes realistic sensory feedback to get appropriate feedback to sense input behavior. Although much recent virtual reality research works extensively consider the human factor, it is not easy to adapt to all new virtual environment contents. Among many human factors, distance perception has been treated as very important in virtual environment interaction accuracy. We study the experiential virtual environment with the feature of the virtual object connected with the real object. We divide the three-dimensional interaction, in which distance perception and behavior have a significant influence, into two types (whole-body movement and direct manipulation) and analyze the real and virtual visual distance perception heterogeneity phenomenon. Also, we propose a statistical correction method that can reduce a near-body movement and manipulation error when changing the interaction location and report the experiment results proving its effectiveness.

• 영어영문학
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• 제55권6호
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• pp.1193-1220
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• 2009

This study examined the impact of sonority profiles, positional differences and L2 proficiency on Korean EFL learners' perception of English biconsonantal clusters, using nonce words. The overall results showed that major predictions of the sonority-based typological markedness on consonant clusters were supported, as obstruent plus sonorant and sonorant plus obstruent sequences were better perceived than obstruent only or sonorant only sequences. Yet, some consonant clusters did not show a preference for sonority profiles. Positional effects were also confirmed, as word-initial biconsonantal clusters were better perceived than wordfinal ones across all the participant groups. Participants' English proficiency turned out to be also important in the perception of consonant clusters, since university students' mean rate of accuracy was highest, followed by that of high school students, which in turn followed by that of middle school students. Further, the effects of other factors like frequency and stimuli on speech perception were also addressed, along with some implications for future research.

• 인지과학
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• 제19권3호
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• pp.311-330
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• 2008

주의가 주어진 위치에 발현되는 공간적 주의는 주의 착점으로부터 거리가 멀어질수록 점진적으로 감소한다. 이에 근거하여 지각과 단기 기억 수준에 작용하는 시각적 주의의 공간적 패턴을 조사하였다. 실험 1에서는 시야의 한 지점에 사전 단서(pre-cue)를 제시한 후 시각적 차폐를 동반한 표적 자극을 변별하는 지각적 처리 과제(perception-intensive task)와 차폐 자극이 없이 단서 위치의 항목을 기억해야 하는 기억 처리 과제(memory-intensiv, task)가 사용되었다. 지각 과제에서 표적 변별 정확도는 주의 착점에서 가장 높았고 인접한 위치에 제시된 표적일 경우 단서 위치로부터 거리가 멀어질수록 점진적으로 저하되었다. 반면에 기억 과제에서는 단서 위치에 제시된 기억 항목만이 정확히 재인되었으며 인접한 항목들에 대한 기억 재인은 우연 수준에 머물렀다. 실험 2는 지각 처리 과제에서도 객체(object) 수준의 공간적 주의가 작용함을 보여주어 기억 과제에서 관찰된 객체 중심적 주의 효과가 경우에 따라서는 지각적 처리 과정에서도 발현될 수 있음을 보여주었다. 이 결과는 선별적 주의 효과는 위치 중심적 모형의 예견에만 국한되지 않고 요구되는 정보 처리 수준의 공간적 특성에 따라 위치 중심적 또는 객체 중심적으로 융통성 있게 작용함을 시사한다.

• 근관절건강학회지
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• 제23권2호
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• pp.84-94
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• 2016

Purpose: This research aimed to identify levels of nurses' perception and practice of fluid intake and output (I & O) measurement and to explore the relationship between perception and practice of it. Methods: Using a cross-sectional survey design, 195 nurses who practiced fluid I & O measurement were recruited from a general hospital. Nurses who agreed to participate in this study completed a structured study questionnaire to assess their levels of perception and practice of fluid I & O measurement. Results: A level of perception of I & O measurement was high (3.46 points out of 5), and scores for 3 subdomains of I & O (importance, accuracy, and efficacy) were evenly high. The level of practice of I & O was fairly high (3.76 points out of 5). Perception and practice of I & O were highly correlated (r=.73, p<.001). Conclusion: Nurses seem to have higher levels of perception and do practice fluid I & O measurement correctly. In order to have reliable and valid I & O measures, nurses need to have continuous education on I & O measurement based on clinical guideline to utilize it as an invaluable clinical instrument.

• 임상간호연구
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• 제24권1호
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• pp.23-33
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• 2018

Purpose: The purpose of this study was to investigate the effect of SBAR communication program on nurse's perception about communication and attitudes toward patient safety. Methods: A single-group pre-post experimental study was conducted. A SBAR education program was provided to 167 nurses working in 9 general wards of a hospital in Seoul. A total of 153 questionnaires were included for the final analysis. Statistical analysis included analysis of variance, paired sample t-test, and Cochran-Mantel-Haenzel test. Results: After applying SBAR communication education, nurses perceived significant improvement in three of the five categories of communication between nurses and doctors; satisfaction (p=.001), accuracy (p=.001), and understanding (p=.002). The indicators of communication between nurses were also improved significantly in the order of accuracy (p=.001), satisfaction (p=.001), shift communication (p=.001), and openness (p=.016). The scores of nurse's attitudes toward patient safety demonstrated a significant increase in the five categories out of the six; perception of management (p=.001), working condition (p=.001), safety climate (p=.001), teamwork climate (p=.001), job satisfaction (p=.012). Conclusion: It is recommended that nurses and doctors use SBAR communication in their practice. Developing education programs and utilization methods is required for the effective establishment of SBAR communication.

• 한국치위생학회지
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• 제18권5호
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• pp.717-727
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• 2018

Objectives: This study aimed to provide basic data on ways to facilitate effective communication between patients and dental hygienists, to improve the job satisfaction of dental hygienists, and to reduce the turnover rate among dental hygienists. Therefore, a comparative analysis of the perception of dental hygienists' emotional labor was conducted targeting patients and dental hygienists. Methods: Data were collected from August 1 to September 20, 2018, from 367 participants, including 216 dental hygienists and 151 patients residing in Gwangju, Jeonnam. Using the co-orientation model, their perception of dental hygienists' emotional labor was analyzed through the independent t-test and paired t-test. Results: With reference to objective consistency, patients showed a higher perception of dental hygienists' emotional labor than dental hygienists did, indicating that the former perceived the emotional labor more negatively. Regarding accuracy, there were significant differences in dental hygienists' response to six questions, while the same was observed for 11 questions for patients. Thus, the accuracy of dental hygienists was relatively higher than that of patients. Conclusions: To help dental hygienists perform dental health prevention activities more actively, consistently, and happily, and to establish commitment and professionalism in dental hygienists to enhance national dental health. Additionally, it would be necessary to sustain continuous research interest on measures for understanding the co-oriented relationship between patients and dental hygienists, and to solve the negative elements of dental hygienists' emotional labor.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권10호
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• pp.5095-5111
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• 2019

A multi-rotor Unmanned Aerial Vehicle (UAV) system is developed to solve the manhole cover detection problem for the infrastructure maintenance in the suburbs of big city. The visible light sensor is employed to collect the ground image data and a series of image processing and machine learning methods are used to detect the manhole cover. First, the image enhancement technique is employed to improve the imaging effect of visible light camera. An imaging environment perception method is used to increase the computation robustness: the blind Image Quality Evaluation Metrics (IQEMs) are used to percept the imaging environment and select the images which have a high imaging definition for the following computation. Because of its excellent processing effect the adaptive Multiple Scale Retinex (MSR) is used to enhance the imaging quality. Second, the Single Shot multi-box Detector (SSD) method is utilized to identify the manhole cover for its stable processing effect. Third, the spatial coordinate of manhole cover is also estimated from the ground image. The practical applications have verified the outdoor environment adaptability of proposed algorithm and the target detection correctness of proposed system. The detection accuracy can reach 99% and the positioning accuracy is about 0.7 meters.

• 한국IT서비스학회지
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• 제20권3호
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• pp.27-40
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• 2021

There have been a series of mixed reviews on the 'untact work' which was implemented for the safety of the organizational members from Covid-19. This study reports a follow-up study with a quantitative approach to issues identified by in-depth interviews with workers and managers who have experiences in work from home. To compare the views of workers and managers on untact work, 264 workers and 141 managers were surveyed. An analysis of agreement, congruency, and accuracy on the basis of the co-orientation model shows that workers are more positive about the untact work than managers and that managers are found to have a negative perception on untact work. This seems to be a burden on workers. More specifically, managers and workers show significant perception gaps on the issues of unfair evaluation and work-life balance. The results imply that organizations need to make efforts to minimize the perception gaps between workers and managers. This would bring about benefits from untact work.

• 정보과학회 컴퓨팅의 실제 논문지
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• 제22권3호
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• pp.157-162
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• 2016

본 논문에서는 시각적 피드백을 중심으로 하는 상호작용 시스템에서 화면 갱신속도와 상호작용 정확도의 상관관계를 다룬다. 일반적으로 인간의 시각인지 한계점은 초당 60프레임으로 생각되고 있으나, 본 연구에서는 이보다 높은 갱신속도가 사용자의 상호작용 정확도에 미치는 영향에 대해 알아보고자 한다. 실험을 통해 초당 60프레임 이상의 갱신속도에서도 상호작용 정확도는 증가함을 알 수 있었다. 이러한 결과에 영향을 준 원인을 이미지 렌더링 갱신속도와 사용자 입력 갱신속도 두 가지로 추정하여 이를 확인하기 위한 추가실험을 진행하였다. 비록 모니터의 화면 재생률이 초당 60프레임으로 되어있었지만 vertical sync를 사용하지 않음으로써 그 이상의 갱신속도와의 차이를 느낄 수 있었다. 실험결과를 통해 사용자 입력 갱신속도보다 이미지 렌더링 갱신속도가 상호작용 정확도에 더 큰 영향을 줌을 확인하였다. 본 연구는 상호작용 정확도를 높이기 위해 더욱 높은 갱신속도의 필요성을 제기하며, 인간의 시각인지 한계점은 초당 60프레임 이상이 될 수 있음을 보인다.

• 광고학연구
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• 제25권1호
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• pp.179-201
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• 2014

본 연구는 확장된 상호지향성 모델을 적용하여 광고 창의성 평가에 대한 광고주, 광고 제작자, 소비자 간의 상호인식을 살펴보고자 했다. 이를 위해 창의성이 있다고 평가된 광고물을 대상으로 광고 창의성 평가척도로 타당성이 확보된 독창성, 적합성, 명료성, 상관성에 대해 광고주, 광고 제작자, 소비자 간의 객관적 일치도와 주관적 일치도, 정확도 등을 살펴보았다. 분석결과를 살펴보면, 객관적 일치도의 경우 광고주와 제작자 사이에서 비교적 높게 나타나고, 제작자와 소비자 사이에서는 비교적 낮게 나타났다. 주관적 일치도는 광고주 차원에서는 비교적 높게 나타나고 있으나 제작자 차원에서는 비교적 낮게 나타났다. 정확도의 경우는 제작자 인식과 광고주가 생각하는 제작자 인식, 소비자 인식과 제작자가 생각하는 소비자 인식에서는 높게 나타났으나 광고주 인식과 제작자가 생각하는 광고주 인식에서는 낮게 나타났다. 이 연구결과를 바탕으로 광고주나 광고 제작자는 광고 창의성에 대한 소비자의 생각을 많이 고려할 필요가 있다.