• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2023년도 추계학술발표대회
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• pp.634-636
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• 2023

Surveillance systems play a pivotal role in ensuring the safety and security of various environments, including public spaces, critical infrastructure, and private properties. However, detecting abnormal human behavior in lowlight conditions is a critical yet challenging task due to the inherent limitations of visual data acquisition in such scenarios. This paper introduces a spatiotemporal framework designed to address the unique challenges posed by low-light environments, enhancing the accuracy and efficiency of human abnormality detection in surveillance camera systems. We proposed the pre-processing using lightweight exposure correction, patched frames pose estimation, and optical flow to extract the human behavior flow through t-seconds of frames. After that, we train the estimated-action-flow into autoencoder for abnormal behavior classification to get normal loss as metrics decision for normal/abnormal behavior.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1989년도 한국자동제어학술회의논문집; Seoul, Korea; 27-28 Oct. 1989
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• pp.694-699
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• 1989

This paper presents a technique for an autonomous mobile robot to locate its own position in a visual way. The developed mobile robot perceives its surroundings through an equipped TV camera and acquires the visual information necessary for its next behavior. The robot which is assumed to move in a laboratory environment identifies its position by recognizing three different marks in the environment and analyzing the positional relation between these marks and itself. This technique was examined by an experiment and a satisfactory result was obtained.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1999년도 가을 학술발표회 논문집
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• pp.403-410
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• 1999

General1y, H-section is used for columns and beams in the middle and low steel building, But it has a strong and weak axis. Thus if H-section is used for columns, the structure needs reinforcement on the weak axis. Therefore recently, square holler section(S.H.S) is used for columns because it is able to coiler the vulnerability of H-section. Structural analysis is usually executed under the assumption that connections are either ideally pinned joint or fully rigid joint. Actually all connections are semi-rigid which possess a rotational stiffness. Therefore it can be designed economically as using the property of connections which has a rotational stiffness. This paper presents a prediction model curve which is fitted Kishi-Chen power Model about the behavior of connection between H-beam and S.H.S column. Non-linear analysis program was considered the non-linearity of semi-rigid connection and the geometrical non-linearity under the effect of axial force. It was programed by FORTRAN90 and Visual Basic.

• 한국정보컨버전스학회논문지
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• 제8권1호
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• pp.31-38
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• 2015

소비자들은 단순히 상품을 공급받는 소비자가 아닌 가치중심소비를 하고 이미지를 중시하며, 개성화, 감성화되어가는 소비행태를 보이고 있다. 백화점업계에서도 이러한 소비자의 소비행태변화에 적극적으로 대응하고 점포와 판매환경을 시각적으로 차별화하기 위한 전략으로 VMD에 대한 관심을 높여가고 있다. 본 논문에서는 백화점에서의 VMD의 효과적 전개방안을 상품연출, 상품진열, 색채구성, 조명계획, POP, sign display의 여섯 파트로 구분하여 제시하고 있다.

• Fisheries and Aquatic Sciences
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• 제26권8호
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• pp.514-523
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• 2023

The visible threshold of Oreochromis niloticus responded to high light intensity under short wavelengths, whereas the response to low light intensity under long wavelengths was low, with a minimum visual threshold of 574 nm of LED lights. Movement distance of O. niloticus was dropped at 31℃ and increased abnormally at 37℃ under natural light. Comparing movement distance under red (622 nm) and green (518 nm) lights of LED, movement distance and swimming speed under red and green lights were higher than under natural light. However, the movement distance decreased rapidly at 31℃ under red light and lowest at 33℃ under green light. After that, there was a tendency to adapt to high water temperatures gradually. Consequently, red and green lights may be recommended for O. niloticus's aquaculture because the red and green lights have a positive effect on growth performance, survival rate, and metabolism, as shown in previous studies. It is necessary to control the water temperature below 32℃ because abnormal behavior above 32℃ revealed under red and green LED lights and natural light.

• 한국비블리아학회지
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• 제26권4호
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• pp.5-30
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• 2015

장애인의 고등교육에 대한 관심이 높아지면서 해를 거듭할수록 장애대학생도 증가하고 있지만, 장애대학생의 성공적인 대학생활이 이루어지고 있는가는 별개의 문제로 보아야 한다. 이 연구는 국내 시각장애대학생의 정보접근권 보장과 정보복지 향상을 위해 체계적인 대체자료 지원체계를 마련하기 위한 목적으로 수행되었다. 이를 위해 국내 시각장애대학생을 위한 대체자료 제작 공급체계와 시각장애대학생들의 대체자료 이용 현황과 요구를 분석하였으며, 데이터 수집을 위해 대학 장애학생지원센터 담당자와 시각장애대학생을 대상으로 설문조사를 실시하였다. 국내 시각장애대학생을 위한 대체자료 지원체계 방안으로 1) 국립장애인도서관의 역할 강화, 2) 네트워크 구축을 통한 장애학생지원센터의 역량 강화, 3) 저작권 보호를 위한 기술적 제도적 개선 등을 제안하였다.

• 수산해양기술연구
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• 제51권1호
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• pp.102-110
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• 2015

The characteristics of aquatic light fields are generally reflected in the visual systems of fishes inhabiting them. Therefore, research on light sensitivity of fish is useful to explain the correlation between the visual function and habitat, behavior and distribution of fish. Rockfish is an important species in coastal ecology and also one of the main species for culturing in Korea. To make a contribution on the maintenance of the fish resources and understanding the ecology of the rockfish, the visual spectral sensitivities of the dark-adapted rockfishes were measured in the range of visible light (405~660 nm) using a light source of light-emitting diodes (LEDs). In order to assess electrophysiological response of the fish, the ERGs (electroretinograms) of the dark-adapted rockfishes were recorded on a data logger (12 bits) and a laptop computer. Juvenile (n=5; weight: $20.3{\pm}5.2g$; total length: $10.3{\pm}0.7cm$) and adult (n=5; weight: $87.8{\pm}21.8g$; total length: $18.1{\pm}1.3cm$) rockfishes were used in experiment. The visual threshold of juvenile and adult rockfish were 11.66 (log quanta/$cm^2/s$) and 11.81 (log quanta/$cm^2/s$) in 574 nm, respectively. The peak wavelength of the spectral sensitivity in the dark-adapted juvenile and adult rockfish was commonly 551 nm (series of green color). Collectively, these results demonstrate that the rockfish has suitable visual capabilities for inhabiting coastal water in Korea.

• 한국전문물리치료학회지
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• 제14권4호
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• pp.66-74
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• 2007

The aim of the present study was to investigate age-related differences in stepping behavior in response to sensory perturbations of postural balance. The participants for this study were 2 healthy elderly adults (mean age=76.0) and 2 younger adults (mean age=25.5). Subjects were asked to step over a 10 cm high obstacle at self-paced speed with the right limb to land on the primary target (normal step length) that is 10 cm in diameter. However, if, during movement, the light was illuminated, then the subject had to step on the secondary target (long step length). It was planned that the onset of the light would be prior to peak Fx of swing limb, between swing peak Fx and swing toe-off, and after swing toe-off. In the younger adults these secondary visual cues were provided at mean times of 240 ms (standard deviation (SD)=11), 402 ms (SD=13), and 476 ms (SD=88) following the movement onset. Corresponding mean times for the healthy elderly were 150 ms (SD=67), 352 ms (SD=39), and 562 ms (SD=115). Results showed great changes in both group and visual cue condition in Fx ground reaction forces and temporal events following the swing toe-off. Swing limb acceleration force (Fx) and stance peak Fx1 was much greater in the young adults compared to the older adults. Both young and older adults increased stance peak Fx2 in the visual cue condition compared to normal stepping. There was no difference in stance peak Fx2 between the visual cue conditions in both groups. Similarly, the time to stance peak Fx2 was much longer for the visual cue condition than for the normal stepping. It was not different between the visual cue conditions in the young adults, but in the elderly mid and late cue was much greater than early cue. In addition, time to stance peak Fx2 and swing and stance time were much longer in the older adults compared to the young adults for the visual cue conditions. These results suggest that unlike young adults, elderly adults did not flexibly modify their responses to unexpected changes in step length while stepping over obstacles.

• 한국융합학회논문지
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• 제12권12호
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• pp.213-222
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• 2021

본 연구는 패션 버추얼 인플루언서(FVI)의 시각적 요소가 팔로워 행동의도, 중독에 미치는 영향요인을 확인하고자 하였다. 요즘 FVI의 팬 수가 증가하고 있으며, 소셜 플랫폼의 중독 현상도 증가하면서 연구자들은 FVI의 시각적 측면으로 팬들의 행동의도와 중독에 이르는 경로를 확인하는 연구가 필요할 것으로 보았다. 연구결과 FVI의 시각적 요소인 매력성은 전문성을 통해 진정성을 영향을 미치는 것으로 확인되었다. 또 진정성은 행동의도의 관계유지를 통해 몰입에 영향을 미치는 것이 확인되었고 진정성은 몰입을 통해 중독에 영향을 미치는 것도 확인되었다. 연구자들은 본 연구를 통해 FVI의 시각적 요소가 행동의도와 중독에 이르는 경로를 시각적 요소와 진정성, 진정성과 행동의도, 행동의도와 중독 등으로 설정하여 검정하였다는 점에서 이론적, 실무적 공헌점이 있다고 보았다. 연구자들은 향후 FVI의 다양한 콘텐츠 유형, 소셜 플랫폼의 측면으로 연구가 확대되길 기대한다.

• 대한건축학회논문집:계획계
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• 제34권10호
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• pp.83-94
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• 2018

In many theoretical and empirical studies on the design issues of therapeutic healthcare facilities, spatial configuration that promotes users' wayfinding behavior, has been emphasized as a significant factor to mitigate stressful experiences and to enhance restorative quality in the healthcare environment. This is also applicable to the healthcare setting for children. However, not much evidence has been reported with regard to the relationship between spatial configuration and wayfinding behaviors in this specific setting. Moreover, healthcare facilities for children with physical disabilities need more attention to provide easy wayfinding due to various physical restrictions. The aim of this study is therefore, to unfold the relationship between spatial configuration and visual cognitive qualities of outpatient spaces in the selected children's rehabilitation hospitals in Seoul, by examining visual cognitive attributes such as visibility, accessibility, and intelligibility. In the first phase, the spatial layout of the hospitals was analyzed, with an emphasis on the major outpatient areas such as the entrance lobby, doctors' examination, and physical therapy zones. In the second phase, a space syntax tool was implemented to examine visual cognitive characteristics of the spatial configuration. The spatial configuration parameters measured were integration, integration core, visual isovist field continuity, correlation between integration and step depth, and the correlation between integration n and integration 3. As a result, the integration was higher in the hall type configuration. Circulation intersections acted mostly as integration cores for better visibility. Some areas showed the lack of continuity in the visual isovist fields overlap and irregular correlation between integration and step depth. The intelligibility was higher in the circulation area and social interaction spaces such as a cafe, reception waiting, and therapy waiting areas. Based on the analysis, design implication and possible future improvement were discussed to enhance wayfinding experiences in the hospitals for children with physical disabilities.