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전방 스피커 어레이 재생 방식 기반 음향 재현 성능 평가
유재현,장대영,이태진 한국방송∙미디어공학회 2015 방송공학회논문지 Vol.20 No.5
고화질, 고품질 방송에 대한 관심이 크게 증가하면서 영상 신호 뿐만 아니라 음향 신호의 고품질화를 요구하는 목소리도 높아지고 있다. 음향 신호의 고품질화에 기여하는 요소 중 하나는 가령, 10.2채널, 22.2채널 등과 같은 재생 채널 수의 확장이지만 이는 많은 수의 스피커를 설치해야만 하는 문제점이 발생한다. 이와 같은 문제를 해결하기 위한 한 가지 방법으로 전방 스피커 어레이를 통한 입체 음향 재생 방식을 들 수 있는데 본 논문에서는 스피커 어레이 기반 음장 재생 방식인 음장합성 기술 (Wave Field Synthesis, WFS)에 대한 소개 및 이론적인 분석을 하고 이 기술로 구현한 전방 스피커 어레이 시스템의 입체 음향 재현 성능을 확인하기 위한 주관 청취 평가 결과를 제시한다. 결론적으로, WFS에 기반한 전방 스피커 어레이 재생 방식이 디스크리트 5.1채널 재생 방식과 비교하여 만족스러운 음장감을 제공한다는 것을 알 수 있었다.
유재현,손애리 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.6
The interest is closely related to the lives of modern people in the .21st Century. Exchanging information with others over the interest in any place through is possible nowadays and such exchanging information has been developed at rapid speed also in the areas of health and medical care. With increasing interest in their health, the tendency is that the number of the Internet users is on the increase. Such being the case, it has become urgently necessary to assess whether all information regarding health, medical care, products and services offered over the internet benefit the Internet users and the right information can be searched for and accessible. Under such circumstances, they have already developed barometers for such evaluation both at home end abroad, and have been evaluating the sites but the evaluation findings have been negative. This study was to evaluate sites ffering obesity health drawing increasingly keen interest of modern people and attempted to find out about the present conditions on such sites through their cross comparisons. We selected 210 local sites (14 public organizations and association, 34 general hospitals and clinics and 162 commercial organizations) by searching for such key words as obesity and diet at Rankey. com providing rankings in each area. The sites were evaluated and analyzed on the basis of 21 items under eight evaluation criteria such as contents, authorship, purpose, design, aesthetics, functionality, feedback, confidentiality and public interest, and caught hold of quality levels and present conditions of the sites. The research results showed most of the sites rated as short of expectation in respect of their contents and authorship, which amply attested to the necessity for the control of sites in the future as well as in the past. This seems to indicate that such control system as information certification system in the areas of health and medical care is required.
유재현,김병준 한국스포츠심리학회 2022 한국스포츠심리학회지 Vol.33 No.4
Purpose: The purpose of the study was to determine the factors of athlete leadership by exploring the behavior of athlete leader, and to identify the roles and influences of athlete leadership. Methods: University athletes in 11 sports participated in two qualitative and quantitative data collection stages. Data from open-ended questions were content-anlayzed. Data processing was conducted to analyze athlete leaders’ main behaviors, roles and technical statistics were performed to understand the athlete leaders’ influence, behavior, and teammates’ preferences. Results: In training and competition situations, the athlete leaders’ main positive behaviors included shouting for encouraging teammates. The main negative behavior was to express dissatisfaction and anger to the team, In daily life, athlete leaders tended to emphasize strict obedience of living rules. The main negative behavior was to forcefully instruct compliance with living rules. Athlete leadership had five factors: taking the initiative and setting an example, encouragement and atmosphere formation, guidance and advice provision, unity and communication, and negative influence. Athlete leaders preferred by the teammates were the team’s official leader, captain and vice-captain. Athlete leaders’ feedback on the team’s deficiencies was the highest contributor to team confidence and teammate’s preference. Athlete leaders’ clapping or thumbs-up during the game was rated as the most effective behavior that helps team members. Conclusion: The results suggested that athlete leaders can exert positive influences on the team and ultimately help achieve the team’s goal.