• The Journal of Korean Physical Therapy
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• 제34권5호
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• pp.212-217
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• 2022

Purpose: This study sought to investigate the effects of visual cue deprivation balance training by applying head control feedback to the balance function and the fall index in older people. Methods: The study was conducted on 26 older people at the S Hospital in Gyeongsansi. The patients were randomly divided into the experimental groupI (EGI, n=9), the experimental groupII (EGII, n=9), and the control group (CG, n=8). The three groups were trained for 30 minutes three times a week for four weeks. To assess the patients' static balance function, their limits of stability (LOS) was measured using the BioRescue system, (RM Ingenierie, France), composed of a pressure platform that can measure force in diverse ways, a computer, and a monitor. The dynamic balance function was measured using the Berg Balance Scale (BBS). Also, the fall index was measured to evaluate the risk of falling. A paired t-test was performed to compare pre- and post-training performance within the groups. One-way ANOVA was performed for comparing the three groups. A post hoc least significant difference (LSD) test was also performed. Results: The results of the LOS showed a significant difference after training in the EGI and EGII groups (p<0.05). As a result of the difference between the three groups, there was a significant difference after training (p<0.05). The results of the BBS showed a significant difference after training in the EGI group (p<0.05). As a result of the difference between the three groups, there was a significant difference after training (p<0.05). Conclusion: Visual cue deprivation balance training applying head control feedback is effective in improving the dynamic balance function in older people. It is also necessary to constantly maintain the head orientation by feedback and to properly control the head movement.

• Journal of the Optical Society of Korea
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• 제4권1호
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• pp.25-29
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• 2000

Two different binocular cues are known for detecting motion in depth. One is disparity change in time and the other is inter-ocular velocity difference. Shioiri, Saisho and Yaguchi (1999) demon-strated that motion in depth can be seen based solely on inter-ocular velocity differences as well as on the disparity change in time. They used conditions in which either cue was minimized and measured performance based on motion in depth, finding better performance than chance level when either velocity cue or the disparity cue was almost isolated. However, there may have been influences from the cue minimized in each condition, since it was practically impossible to isolate perfectly either cue. I re-analyzed their data to examine whether the performance in the condition with disparity change and that in the condition with inter-ocular velocity difference were correlated. The result showed the correlation is very low and therefore, we can conclude that the visual system has two different mechanisms for motion in depth.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.1055-1058
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• 2003

The robustness and reliability of vision algorithms is the key issue in robotic research and industrial applications. In this paper robust real time visual tracking in complex scene is considered. A common approach to increase robustness of a tracking system is the use of different model (CAD model etc.) known a priori. Also fusion or multiple features facilitates robust detection and tracking of objects in scenes of realistic complexity. Voting-based fusion of cues is adapted. In voting. a very simple or no model is used for fusion. The approach for this algorithm is tested in a 3D Cartesian robot which tracks a toy vehicle moving along 3D rail, and the Kalman filter is used to estimate the motion parameters. namely the system state vector of moving object with unknown dynamics. Experimental results show that fusion of cues and motion estimation in a tracking system has a robust performance.

• 감성과학
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• 제20권3호
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• pp.49-60
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• 2017

기존 연구들은 단순히 실물을 만지는 것만으로도 그 대상에 대해 심리적 소유감이 형성되고 그 가치를 높게 평가하게 되는 소유효과가 발생한다는 것을 발견하였다. 또한 단순히 만지는 상상을 하는 경우에도 실물을 만지는 것과 같은 효과가 나타난다는 것이 발견되었다. 기존의 촉각적 심상화 연구에서는 실물을 만지는 상상을 하라는 직접적인 지시에 따른 촉각적 심상화의 효과를 밝혔으나 본 연구에서는 실물을 만지는 상상을 하라는 직접적인 지시보다 촉각적 상상을 자연스럽게 유도할 수 있는 효과적인 방법을 탐색해보았다. 상상유도 조건을 상품에 대한 시각적, 촉각적 단서가 일치하는 다중감각 단서 일치 조건, 불일치하는 다중감각 단서 불일치 조건, 상상하라는 직접적 지시 조건, 통제조건으로 조작하여 촉각적 상상의 생생함, 물리적 통제감, 지각된 소유감, 구매의도에 미치는 효과를 비교하였다. 140명의 대학생을 대상으로 실험을 실시하여 분석한 결과, 시각적 단서와 촉각적 단서가 일치하도록 제공한 다중감각 단서는 촉각적 상상을 직접적으로 지시하였을 때보다도 효과적인 것으로 나타났으며 시각적, 촉각적 단서가 불일치한 경우는 효과적이지 않은 것으로 나타났다. 본 연구는 촉각적 심상화 연구에서 한걸음 나아간 시도이며 온라인 쇼핑과 같이 실물을 보거나 만질 수 없는 환경에서의 상품 제시 방법에 대한 함의점을 제공하는데 의의가 있다.

• 유통과학연구
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• 제13권2호
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• pp.75-83
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• 2015

Purpose - This study aims to identify the effects of communication cues, anonymity, and social presence on group polarization in computer-mediated communication (CMC) settings. Extant literature has introduced some theoretical backgrounds of social presence and SIDE (Social Identity model of Deindividuation Effects) to explain the effects of communication cues and anonymity. The concept of social presence emphasized the mediating role on communication cues and anonymity. However, most literature did not measure social presence and compare group polarization of all condition groups. This does not sufficiently explain the result of group polarization. Research design, data, and methodology - We believe that the direct impact of anonymity on group polarization can provide a more admissible and clearer explanation for the results. In addition, this study categorizes anonymity into two levels, as anonymity of group and anonymity of self. To justify the anonymity view, a laboratory experiment was conducted. The experiment was conducted in communication cues settings (visual cue; without visual cue) and anonymity settings (identified; anonymous). Each of the four settings has 10 groups consisting of five subjects each (total 200 subjects). The subjects are undergraduates from a large university, majoring in business. All experimental procedures and calculations of choice shift and preference change follow the literature. Results - First, the removal of visual cues does not produce a significant impact on group polarization, which cannot be explained by the social presence view. Second, the anonymous condition does not significantly affect group polarization, which also cannot be explained by the social presence view. However, the anonymous condition directly affects group polarization. Specifically, anonymity of self has a stronger effect on group polarization than anonymity of group. The result explains about the leading factor affecting group polarization. This study examines another view of how computer-mediated communication may be associated with group polarization. The process and outcome data from the experiment reveal that group polarization is not affected by level of social presence, but by level of anonymity. Group discussions conducted with visual cue CMC setting and identified CMC setting result in weaker group polarization. Conversely, group discussions conducted without visual cue CMC setting and anonymous CMC setting lead to stronger group polarization. The results of the study have the following implications. First, they provide clues for business organizations to design the most appropriate media conditions and preemptive social conditions to implement when making group decisions through CMC, to maximize achievements, generate amicable agreements, or actively share information. Second, this study can be useful in analyzing different adverse effects generated through Internet use. Conclusions - This research can help explain discussions and decision-making actions on Internet forums, which have recently increased, as well as providing a foundational basis in newly establishing policies for the forums. Finally, it should be noted that many other factors such as group size, topics, and group history may affect group polarization. These should be examined in future studies.

• 한국멀티미디어학회논문지
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• 제15권9호
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• pp.1174-1183
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• 2012

본 연구는 다변화된 정보 인터페이스 환경에서 사용자의 시각 몰입과 재인 과정에 시각단서가 어떠한 역할을 하는지와, 시각정보 구조와의 관련성을 분석하기 위하여 실시되었다. 그리하여 최신 그래픽 정보 사용자 트렌드를 고려하여 과학적인 도구와 주관적 내면 평가를 활용한 평가모형을 설계하고, 보다 체계적인 실험과정을 통하여 획득한 몰입과 재인의 사용자 경험 데이터를 분석하였다. 이를 토대로 향후 최신의 디바이스에 광범위하게 적용 가능한 그래픽 정보 사용자의 기초설계모형과 표준 평가 모형을 구축하는 데 기여할 수 있을 것이다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2010년도 추계학술대회
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• pp.147-148
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• 2010

Recently, advancement in the visual technology has lead to the further development of the three dimensional (3D) imaging systems. The visual perception to view a pair of images simultaneously, is a crucial factor to build a stereoscopic 3D image. In this paper, we present the depth cues between the intensities of the two images when viewing with both eyes. Due to this stereoscopic effect, objects at different distances from the eyes differ in their horizontal positions, giving the depth cue of horizontal disparity. By simple image processing technique, we also present the binocular disparity map between the two images. A median filter has been used to filter out all the noises occurring in the disparity map image.

• 한국산학기술학회논문지
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• 제14권2호
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• pp.737-743
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• 2013

본 연구는 시각 통제를 이용한 다중감각 훈련이 아급성 뇌졸중 환자의 균형 및 체간위치감각에 미치는 영향을 알아보고자 시행하였다. 뇌졸중 환자 30명을 대상으로, 다중감각 훈련군은 시각통제 후 훈련을 실시하였고, 대조군은 안대로 눈을 가린 것을 제외하고는 실험군과 동일한 훈련을 실행 하였다. 두 군 모두 훈련 과정은 4주간 주 5회 60분 동안 실시하였다. 대상자들은 사전, 사후 평가로 정적 균형, 동적 균형 및 체간위치감각을 검사하였다. 본 연구의 결과는 다중감각 훈련군에서 훈련 전, 후를 비교한 결과 정적 균형, 동적 균형, 체간위치감각에서 유의한 향상이 나타났고(p<.05), 두 그룹 사이에서는 동적 균형, 체간위치감각에서 유의한 차이가 나타났다(p<.05). 본 연구의 결과를 통하여 다중감각 훈련은 동적 균형 및 체간위치감각을 향상시키는데 효과적인 훈련방법으로 제시 할 수 있다.

• 말소리와 음성과학
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• 제4권3호
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• pp.25-30
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• 2012

This study investigated whether native Korean listeners could use visual cues for the identification of the English consonants /b/ and /v/. Both auditory and audiovisual tokens of word minimal pairs in which the target phonemes were located in word-initial or word-medial position were used. Participants were instructed to decide which consonant they heard in $2{\times}2$ conditions: cue (audio-only, audiovisual) and location (word-initial, word-medial). Mean identification scores were significantly higher for audiovisual than audio-only condition and for word-initial than word-medial condition. Also, according to signal detection theory, sensitivity, d', and response bias, c were calculated based on both hit rates and false alarm rates. The measures showed that the higher identification rate in the audiovisual condition was related with an increase in sensitivity. There were no significant differences in response bias measures across conditions. This result suggests that native Korean speakers can use visual cues while identifying confusing non-native phonemic contrasts. Visual cues can enhance non-native speech perception.

• 한국소음진동공학회논문집
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• 제24권1호
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• pp.54-61
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• 2014

This paper proposes a driver supportive device with haptic cue function which can transmit optimal gear shifting timing to a driver without requiring the driver's visual attention. Its performance is evaluated under vehicle model considering automotive engine, transmission and vehicle body. In order to achieve this goal, a torque feedback device is devised and manufactured by adopting the MR (magnetorheological) fluid and clutch mechanism. The manufactured MR clutch is then integrated with the accelerator pedal to construct the proposed haptic cue device. A virtual vehicle emulating a four-cylinder four-stroke engine, manual transmission system of a passenger vehicle and vehicle body is constructed and communicated with the manufactured haptic cue device. Control performances including torque tracking and fuel efficiency are experimentally evaluated via a simple feed-forward control algorithm.