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움직이는 표적 포인팅 시간예측 모델과 전통적인 피츠법칙의 비교
홍승권 한국교통대학교 2021 한국교통대학교 논문집 Vol.56 No.-
Moving the mouse cursor to a specific point and clicking it is the most frequently performed task in computing. Many studies have been conducted on whether Pitts' law can explain and predict cursor movement time when a pointing target is fixed. However, there have been few studies on the case of moving the target. This study studied the case where the target approaches the start point of the mouse cursor at a constant speed and the case where it moves away from the start point at a constant speed. As a result of the study, the traditional Fitts’ law was established at the same moving speed. However, the model considering the moving target could not be adequately explained by the experimental data. The explanatory power of the traditional Fitts’ model was higher than the model considering the moving target. The results of this study suggest the need for a study on a diffirent cursor movement time prediction model considering movement targets.
인터넷을 통한 동기화 된 캡션 및 동영상 데이터베이스에 관한 설계 및 구현
홍동권,박기현,신승봉 계명대학교 산업기술연구소 1998 産業技術硏究所 論文報告集 Vol.21 No.1
Current information society requires effective ways to process multimedia data like image, audio, video and so on, Many public of private information providers gather, store multimedia information and supply a different kind of multimedia data to users in everywhere. Most of users nowadays access multimedia data via internet. Audio and video data are usually transmitted to users by using streaming technology for instant replay. In this paper, we investigate database design techniques for effective retrieval of video segment and replay method of retrieved videos, Especially we shows the design and implementation technique for closed captioning of streaming file.
자동차 운전자의 신체변수를 고려한 운전석과 브레이크 페달사이의 적정거리
홍승권 한국교통대학교 2015 한국교통대학교 논문집 Vol.50 No.-
The purpose of this study is to investigate optimal distance between brake pedal and driver seat according to the dirver’s physical characteristics. Additionally, optimal distance between brake pedal and accelerator pedal was investigated. Irregardless of driver’s sex, 75 percentile subjects effectively controlled their foot in 49㎝ distance between brake pedal and driver seat, 50 percentile subjects in 39㎝ and 25 percentile subjects in 34㎝. An optimal distance between brake pedal and accelerator pedal was 4㎝, except for 75 percentile men subjects. This study focused on the accuracy and times of foot movements. drivers’ subjective satisfaction should be surveyed for improving reliability of the results of this study.
홍승권 韓國交通大學校 2013 한국교통대학교 논문집 Vol.48 No.-
Wall-pad is a product that can control and manage home network systems. In this research, the usability of wall-pad was evaluated using a heuristic method that was designed for usability test of wall pad. The heuristic method was developed by integrating various guidelines that proposed for usability test by many researchers. Three experts participated in the usability test. The results are summarized as the followings. The items that can be improved by simple modification are color, characters, consistency of contents, the appearance of buttons. The help system should be introduced in the wall pad for novices. The display of system state, navigation and information structure should be also revised for improving usability, although this modification needs high cost.
홍승권 忠州大學校 2008 한국교통대학교 논문집 Vol.43 No.-
Typically, the usability of hand mouse have been evaluated by Fitts' Law. In this study, the usability of foot mouse was evaluated by Fitts' Law. The previous studies on the foot movements have been focused on pressing foot pedals such as car pedal. Pressing foot pedals is the visually controlled movements differently from the foot mouse. The result of this experiment was that foot mouse operation could be explained by the Fitts' Law as hand mouse operation. However, the index of performance (IP) of foot mouse operation was 2.46. bits/s, the half value of IP of the hand mouse operation. It may be difficult to replace the hand mouse by foot mouse, because of low efficiency. Foot mouse can be used as subsidiary tool of hand mouse. If vertical cursor movements by foot mouse superior to that by hand mouse, the usability of foot mouse would be increased. On the other hand, when th index of difficulties were below 3, ballistic movements of foot mouse were not validated. The following studies is required.
홍승권 한국교통대학교 2014 한국교통대학교 논문집 Vol.49 No.-
Many studies on text legibility have been performed. However they focused on static texts, in situations where readers and texts were not moving. There are many cases in our real life that people have to read moving texts or moving people have to read static texts. This research investigated the legibility of moving English texts with Heletaca font. Text legibility was examined in various experimental conditions; 4 stroke-width ratios, 3 moving distances, 3 spaces between letters and 4 angular velocities. The legibility of texts was measured with the percentage of correct reading. The legibility of moving texts increased with moving distance increase, stroke-width ratio increase, increase of the space between letters and angular velocity decrease. There were interaction effects between weight and angular velocity and between angular velocity and the space between letters. The results of this research can be used as guidelines for the font design of information display where displayed text should be moved
하수 2차 처리수 재이용을 위한 저압 및 중압 고도산화시스템의 성능평가
안규홍,안석,맹승규,김기팔,홍준석,정민우,권지향,Ahmed, Zubair 대한상하수도학회 2003 상하수도학회지 Vol.17 No.4
In the present study, the feasibility of UV/H₂O₂ systems was investigated using low and medium-pres sure lamps on biologically treated wastewater effluents for secondary effluent reclamation. Two types of UV lamps were used as the light sources (a 33W lowpressure mercury lamp and a 350-W mediumpressure mercury lamp). The results from these UV systems showed that the removal of organic compounds could be achieved in the contact time of longer than 30min (i.e., low UV doses). Efficiencies of color removal and disinfection were far better than those of organic matters measured as TOC, DOC and TCOD_(cr). In the low pressure lamp UV system, it has been found that DOC and color removals were 60.9 and 86.2% with 50㎎/L of H₂O₂ and contact times of 30 minute, respectively. Whereas, with the mediumpressure lamp UV system, TOC, DOC and color removal were 27.1, 5.6 and 95% with 14.3㎎/L of H₂O₂ and 14 minute of contact times, respectively. Both systems could be applied for the reclamation of secondary effluent treated with biological treatment processes.
Seung-Kweon Hong 대한인간공학회 2015 대한인간공학회 학술대회논문집 Vol.2015 No.10
민방위 경보음은 민방위 사태에 대비하여 인명과 재산의 피해를 최소화하기 위한 신호수단다. 사람들은 민방위 경보음을 듣고, 그 경고음의 의미를 정확하게 인식하고, 적절한 행동을 해야 한다. 본 연구에서 일반인들이 현재의 민방위 경보음들을 정확하게 식별할 수 있는지를 조사하였다. 경보음 식별정도를 정보이론에 입각하여 분석하였으며, 새로운 경보음을 구상하여 동일한 피 실험자들을 대상으로 실험을 실시하고 분석하였다. 새로운 경보음의 식별력이 더 우수함을 알 수 있었다. 향후에 민방위 경보음의 식별력을 증대시키기 위한 연구들의 후속되어야 할 것이다.