• 디지털콘텐츠학회 논문지
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• 제19권7호
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• pp.1281-1287
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• 2018

이 연구에서는 중도중복장애아동을 위한 보완대체 의사소통(AAC) 앱의 모듈별 세부적 요소와 기능을 도출하고 이에 해당하는 인터페이스를 설계하였다. 연구 결과, 화면구성, 의사소통 판 편집, 시청각출력, 스위치&스캐닝 모듈별 세부 프로그램 구성은 다음과 같다. 화면구성 모듈은 의사소통 범주, 철자판, 즐겨찾기, 화면잠금, 설정 기능으로 구성된다. 의사소통 판 편집 모듈에서는 의사소통 범주, 상징, 즐겨찾기 편집 기능이 포함된다. 시청각적 출력 모듈은 청각적 출력의 형태로 음성의 높낮이, 강도, 속도, 음색을 개인별로 조정하는 기능을 제공한다. 시각적 출력의 형태에서는 칸의 배경색과 크기, 테두리 색과 두께를 조정한다. 스위치&스캐닝 모듈에서는 칸이 청각적, 시각적으로 표시되었을 때 스위치를 누름으로써 선택(클릭)이 이루어지는 기능을 제공한다. 향후 이 연구에서 제시한 프로그램을 실제로 구현한 AAC 앱의 개발이 필요하다.

• Physical Therapy Rehabilitation Science
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• 제13권2호
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• pp.187-195
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• 2024

Objective: Physical activity can promote physical and mental well-being. University students are more sedentary recently due to the increased use of computers and other technology. The aim of this study was to investigate differences between immersive 360-degree virtual cycling (IVC) and virtual cycling with head-mounted display (VCHMD) on aerobic capacity and usability in young adults. Design: A crossover study. Methods: Twenty-five university students (13 male, 12 female) participated in this study and completed 2 separate 30 min cycling sessions, such as IVC and VCHMD. In the IVC, participants rode on a stationary cycle while watching curved TV where recorded video was played. To enhance the sense of realism, auditory stimulation was given to the headset, and the gyroscope sensor was used to track the screen as the head moved. In the VCHMD, participants rode on the stationary cycle with head-mounted display, and other conditions were the same as IVC. Participants were assessed the aerobic capacity which included gas analyzer and portable near-infrared spectroscopy, and usability which included simulator sickness questionnaire and system usability scale. Results: Aerobic capacity was significantly difference in the IVC compared with the VCHMD except for the total hemoglobin of right and left rectus femoris and muslce oxygen saturation of left rectus femoris (p<0.05). Cybersickness was less in the IVC than VCHMD and usability was high in the IVC than VCHMD (p<0.05). Conclusions: The findings suggested that IVC might be beneficial exericse to improve aerobic capacity and has lower cybersickness and higher usability than VCHMD.

• 한국음향학회지
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• 제32권1호
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• pp.79-85
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• 2013

CASA 시스템의 특징 추출은 시간의 연속성과 채널 간 유사성을 이용하여 청각 요소의 상관지도를 구성하여 사용한다. 채널 간 유사성을 교차 상관 계수를 이용하여 특징 추출 할 경우 상관성을 정량적으로 나타내기 위해 계산량이 많은 단점이 있다. 따라서 본 논문에서는 특징 추출 시 계산 량을 줄이기 위한 방법으로 비모수적 상관 계수를 이용한 특징 추출 방법을 제안하고 이를 CASA 시스템을 통하여 목적 음성을 분리하는 실험을 수행하였다. 목적 음성의 분리 성능을 평가하기 위하여 신호 대 잡음비를 측정한 결과, 제안 방식이 기존 방식에 비해 평균 0.14 dB의 미세한 성능 개선을 보였다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2008년도 춘계학술대회논문집
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• pp.920-927
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• 2008

This study deals with modeling of Head-Related Transfer Functions (HRTFs) using Principal Components Analysis (PCA) in the time and frequency domains. Four PCA models based on Head-Related Impulse Responses (HRIRs), complex-valued HRTFs, augmented HRTFs, and log-magnitudes of HRTFs are investigated. The objective of this study is to compare modeling performances of the PCA models in the least-squares sense and to show the theoretical relationship between the PCA models. In terms of the number of principal components needed for modeling, the PCA model based on HRIR or augmented HRTFs showed more efficient modeling performance than the PCA model based on complex-valued HRTFs. The PCA model based on HRIRs in the time domain and that based on augmented HRTFs in the frequency domain are shown to be theoretically equivalent. Modeling performance of the PCA model based on log-magnitudes of HRTFs cannot be compared with that of other PCA models because the PCA model deals with log-scaled magnitude components only, whereas the other PCA models consider both magnitude and phase components in linear scale.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제26권1호
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• pp.45-51
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• 2015

Objectives : Children with attention-deficit hyperactivity disorder (ADHD) have been shown to display more inhibitory deficits and executive function deficits. This study investigated the treatment effects of neurofeedback (NF) training on executive function by comparing the results of neuropsychological tests of the trained children at pre- and post-training. Methods : Fifteen children with ADHD, aged 6 to 14 years, participated in the study. The NF treatment consisted of slow cortical potential (SCP) training and these sessions took place once a week. The ADHD children performed 20 sessions of NF training within 6 months. Pre-training and post-training assessments encompassed Continuous Performance Test (CPT), Stroop Test, Children's Color Trails Test I&II (CCTT) and Wisconsin Card Sorting Test (WCST). Results : Patients receiving NF training showed significant improvement in visual commission error and standard deviation of auditory response time on CPT ; and total errors on WCST. But there was no significant improvement in the Stroop test and CCTT. Conclusion : SCP training using NF improves the self-regulatory capacities and impulsivity in ADHD patient, especially impulsivity in visual stimulation tasks. This study showed evidence of clinical efficacy of NF on executive function in ADHD.

• Journal of Platform Technology
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• 제9권3호
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• pp.24-35
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• 2021

고속의 군용 항공기는 인명피해 최소화를 위해 생존 장비들과 경고 시스템으로 적의 위협 또는 내부 구성품 불량을 조종사가 파악하고 해결할 수 있어야 한다. 경고 전달은 디스플레이에 심볼 전시를 통한 시각적 방법과 통신 장비의 소리를 통한 청각적 방법으로 구분되는데, 청각적 방법이 반응 시간이 짧고 단순한 메시지 청취를 통해 조종사 혼란을 유발하지 않는다는 점에서 우월하다. 이에 본 논문은 군용 항공기용 음성/톤 경고 시스템의 효과적인 설계방법을 생명주기 관점에서 제시하고 평가하였다. 안전에 민감한 군용 항공기이므로 각 경고에 우선순위와 Inhibitible, Interruptible, Deactivatable의 세 가지 속성들을 적용하여 중대성과 긴급성을 반영했다. 그 결과 음성경고 재생까지 40ms가 소요되었으며, V모델 기반 개발 및 테스트를 통해 요구도를 모두 충족했고 제품 신뢰성이 향상됨을 확인하였다.

• 한국컴퓨터정보학회논문지
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• 제24권11호
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• pp.61-69
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• 2019

본 연구에서는 문화유산 교육을 위한 다중 감각 (시각 청각 촉각) 지원 기반 증강현실 시스템을 제안한다. 제안된 시스템에서는 3D프린트 된 유사유물 모델을 AR 타깃으로 활용하고, 증강하는 가상객체에는 실제유물 기반으로 구현된 3D그래픽을 매핑한다. 사용자는 3D프린트 된 모델의 촉감을 느끼면서 AR유물학습을 진행할 수 있어 다중 감각을 통한 상호작용을 경험하게 된다. 기존 문화유산 교육 시스템과 비교했을 때 본 시스템은 시각 및 청각뿐만 아니라 촉각을 제공하는데 중점을 두고 설계되었다. 또한 이 시스템은 3D모델을 사용하여 직접적인 상호작용을 제공하여, 주로 휴대전화와 태블릿의 2D 디스플레이에 터치 또는 클릭 모션으로 상호작용하는 기존 시스템보다 훨씬 사실적인 경험을 주도록 구성되었다. 사용자 테스트 결과에 따르면 본 유물교육시스템은 사용자에게 우수한 현존감 및 학습 몰입감을 제공하였으며, 타깃의 사용성 평가에서는 본래 유물과 모양이 유사한 3D 프린트 된 타깃의 사용성이 가장 좋게 평가되었다.

• 한국의류산업학회지
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• 제22권3호
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• pp.296-309
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• 2020

Carol Christian Poell is a designer famous for experimental designs and presentations. Poell's actions in the fashion-world resemble Fluxus, an anti-art group that started working in the 1950s. This study analyzed the works of Poell based on the characteristics of Fluxus and then compared the works of Poell with the performance of Nam June Paik, a Fluxus artist. We conducted literature studies and case studies. We examined the works of Poell and Paik based on the four characteristics of Fluxus: iconoclasm, unity of art and life, playfulness and chance. The results were as follows. First, they were engaged in anti-aesthetic works. While Paik concentrated on the content aspect of works, Poell was more focused on formal aspects. Second, neither of them distinguished between art and life. Paik achieved it by including audiences in his works; however, Poell attained it by adopting daily spaces as a place to display presentations and use ready-made forms. Third, they showed playfulness with a satirical nuance. Paik expressed it in an erotic way; however, Poell implied it through the irrational settings of circumstance. Finally, they created works by utilizing chance. Paik focused on auditory elements and the content aspects of works; however, Poell used the coincidence of visual and tactile elements when creating his works. This study compared the works of Poell with Paik and has its significance in its usefulness to understand designers with Fluxus characteristics in the fashion industry.

• 한국소음진동공학회논문집
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• 제24권4호
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• pp.282-288
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• 2014

Three-dimensional multimedia industry such as 3D TV, movie and broadcast has been developed vividly. For generating 3D contents with high quality, virtual auditory display, so called VAD, is being researched to offer more realistic experience to listeners. When people render VAD using headphones or two speakers, head-related transfer function(HRTF) plays a key role. The best solution is measuring all individuals' HRTFs, but it is hard to measure all listeners' HRTFs. To overcome this difficulty, many research groups have tried to construct their own measurement system and to build HRTF databases. However, some of them have not enough subjects or spatial resolution and they are mainly focused on Caucasian. There exists difference between Korean and Caucasian in a view of physical features. In other words, if Koreans hear three-dimensional sound rendered by HRTF database based on Caucasian, performance might be hindered. To verify this possibility and remedy the drawbacks, construction of new HRTF database aimed at Korean is needed. Therefore, our laboratory built HRTF measurement system which can measure HRTF of three-dimensional space with dense spatial resolution. With this system, 55 Korean males and 45 females' HRTFs were measured and Korean HRTF database was built based on these data.

• 한국동물번식학회:학술대회논문집
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• 한국동물번식학회 2001년도 춘계학술발표대회
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• pp.48-48
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• 2001

A new neurological mutant has been found in the ICR outbred strain mouse. Affected mice display profound deafness and a head-tossing and bidirectional circling behavior, showing an autosomal recessive mode of inheritance. It was, therefore, named cir/Kr with the gene symbol cir. The auditory tests identified clearly the hearing loss of the cir mice when compared to wild type mice. Pathological studies confirmed the developmental defects in the middle ear, cochlea, cochlear nerve, and semicircular canal areas, which were correlated to the abnormal behavior observed in the cir mice. Thus, cir mice may be useful as a model for studying inner ear abnormalities and deafness. We have constructed a genetic linkage map by positioning 14 microsatellite markers across the (cir) region and intraspecific backcross between cir and C57BL/6J mice. The cir mouse harbors an autosomal recessive mutation on mouse chromosome 9. The cir gene was mapped to a region between D9Mit116 and D9Mit38 Estimated distances between cir and D9Mit116, and between cir and D9Mit38 are 0.7 and 0.2 cM, respectively. The gene in order was defines : centromere-D9Mit182-D9Mit51/D9Mit79/D9Mit310-D9Mit212/D9Mit184-D9Mit116-cir-D9Mit38-D9Mit20-D9Mit243-D9Mit16-D9Mit55/D9Mit125-D9Mit281. The mouse map location of the cir locus appears to be in a region homologous to human 3q21. Our present date suggest that the nearest flanking marker D9Mit38 provides a useful anchor for the isolation of the cir gene in a yeast artificial chromosome contig.