Due to COVID-19, people have to adapt to the new lifestyle until scientists develop a permanent s... more Due to COVID-19, people have to adapt to the new lifestyle until scientists develop a permanent solution for this pandemic. Monitoring the respiration rate is very important for a COVID-infected person because the Coronavirus infects the pulmonary system of the person. Two problems that arise while monitoring the breath rate are: sensors are contact based and expensive for mass deployment. A conventional wearable breath rate monitoring system burdens the COVID-affected patient and exposes the caregivers to possible transmission. A contactless low-cost breath monitoring system is required, which monitors and records the breath rate continuously. This paper proposes a breath rate monitoring system called COVID-Beat, a wireless, low-cost, and contactless Wi-Fi-based continuous breath monitoring system. This sensor is developed using off-the-shelf commonly available embedded Internet of Thing device ESP32, and the performance is validated by conducting extensive experimentation. The bre...
The 25th International Conference on 3D Web Technology
Figure 1: A unified XR content representation (middle) and its rendered results in VR (left) and ... more Figure 1: A unified XR content representation (middle) and its rendered results in VR (left) and AR (right). (1) is a virtual object group, which is represented by a wxr-group tag in the code, containing three virtual objects ((3), (4), and (5)). (2) is an ar-target attribute, which makes the wxr-group element work as an AR anchor as well, and its value is a URL that indicates the feature data. The feature data is a string image of '3624-5P' and is attached to the surface of the real handle (right). (3), (4), and (5) are virtual objects of the handle, curved arrow, and annotation, respectively. These virtual objects are rendered normally in VR (left) and augmented in AR (right).
Many studies have consistently proven that repeatedly watching virtual reality (VR) content can r... more Many studies have consistently proven that repeatedly watching virtual reality (VR) content can reduce cybersickness. Moreover, the discomfort level decreases when the VR content includes an unusual orientation, such as an inverted scene. However, few studies have investigated the physiological changes during these experiences. The present study aimed to identify psychophysiological correlates, especially the neural processing, of cybersickness. Twenty participants experienced two types of VR orientation (upright and inverted), which were repeated three times. During the experience, we recorded the participants’ subjective levels of discomfort, brain waves, cardiac signals, and eye trajectories. We performed a heartbeat-evoked potential (HEP) analysis to elucidate the cortical activity of heartbeats while experiencing cybersickness. The results showed that the severity of cybersickness decreased as the participants repeatedly watched the VR content. The participants also reported le...
본 발명은 비디오 게임기 및 컴퓨터 게임 같은 엔터테인먼트 정보기기, 지형 공간 정보를 표현하는 정보기기 또는 컴퓨터 그래픽을 이용한 3차원 렌더링을 수행하는 정보기기에 적용... more 본 발명은 비디오 게임기 및 컴퓨터 게임 같은 엔터테인먼트 정보기기, 지형 공간 정보를 표현하는 정보기기 또는 컴퓨터 그래픽을 이용한 3차원 렌더링을 수행하는 정보기기에 적용되는 기술로서, 대상물을 표면으로부터 돌출되도록 표현하는 돌출 변위 매핑 방법에 관한 것이다. 이 발명에 따른 돌출 변위 매핑 방법은, 변위정보에 의해 정의되는 돌출된 물체의 표면과 관찰자 시선과의 교점을 검색하 여 상기 돌출된 물체 형상을 상기 폴리곤 면에 표시하는 교점검색단계와; 상기 폴리곤 면을 추가하여 상기 폴리곤 면의 경 계를 벗어나는 초과분에 해당하는 상기 돌출된 물체 형상을 상기 추가 폴리곤 면에 표시하는 초과분표시단계와; 상기 돌출 된 물체 형상 중 급격한 경사면을 검출하는 급격경사면검출단계와; 상기 급격한 경사면에 추가 텍스처를 표현하는 급격경 사면보정단계를 포함한다.
이 발명은 컨테이너 하우스 형태로 제작하여 설치현장으로 이송한 후 전원 공급만으로 간단하게 이용이 가능하며, 공간적인 제약이 없이 이동이 가능한 이동식 몰입형 가상환경제공 시... more 이 발명은 컨테이너 하우스 형태로 제작하여 설치현장으로 이송한 후 전원 공급만으로 간단하게 이용이 가능하며, 공간적인 제약이 없이 이동이 가능한 이동식 몰입형 가상환경제공 시스템에 관한 것이다. 이 발명은 이동이 가능한 공간에 멀티채널의 고해상도 몰입형 디스플레이 시스템과 공조 시스템을 겸비하여 몰입형 가상환 경을 제공할 수 있어, 설치 장소에 별도의 공사를 필요로 하지 않고, 간단히 운반하여 설치하는 것만으로 사용이 가능하다. 또한,공사현장등과같이가변적인환경또는자주변하는환경에빠르고다양하게적용할수있도 록 필요에 따라 이동식 몰입형 가상환경의 확장이 가능하며, 더 나아가 내부의 고해상도 몰입형 디스플레이 채널 수와 구성의 변경이 용이하고, 공간의 자유로운 구성이 가능하다.
2019 IEEE International Conference on Computational Science and Engineering (CSE) and IEEE International Conference on Embedded and Ubiquitous Computing (EUC), 2019
The advent of superior research and advances in medicine and healthcare have led to an increase i... more The advent of superior research and advances in medicine and healthcare have led to an increase in life expectancy of humans increasing the aging population in many countries. Due to the rapid cost-to-performance ratio of the Internet of Things (IoT), many sectors are adopting IoT from agriculture to healthcare and daily life applications; monitoring elderly patients pervasively with IoT can improve elderly care while minimizing caregivers' effort. Furthermore transparent and uninterrupted monitoring by caregivers helps them finding patterns in elderly patients before precarious incidents, costing much more to care. Ambient Assisted Living (AAL) is a term that indicates the concept of improving wellness and health conditions of older adults. In the current scenario, AAL extends to learning the elderly behavior by caregivers to avoid accidents in the future. In this context, KLog-Home project is being carried out as an initiative deployed to an elderly care home to monitor the elderly inhabitants continuously to help caregivers get notified of critical events and act instantly to avoid fatal incidents. KLog-Home enriches the concept of AAL with videos enabling, Video Assisted Ambient Living (VAAL). This multi-modal scenario is achieved by leveraging the technological benefits from IoT and communication technologies and envisioning a solution to provide ubiquitous care to senior people while enabling them to live an independent, safe and secure life.
2017 IEEE International Conference on Consumer Electronics (ICCE), 2017
Although internet of things (IoTs) devices are attractive for making our life smarter, we need to... more Although internet of things (IoTs) devices are attractive for making our life smarter, we need to replace existing equipment with IoT devices to connect, and this presents a cost problem. We propose a webized augmented reality mashup for legacy things that connects existing web services with things without the additional costs of replacing existing equipment.
Proceedings 2001 ICRA. IEEE International Conference on Robotics and Automation (Cat. No.01CH37164), 2001
This paper presents key technologies and system integration issues of the KAIST interactive bicyc... more This paper presents key technologies and system integration issues of the KAIST interactive bicycle simulator. The rider on the bicycle feels the motion and has the visual experience as if he/she is riding in the campus of the Korea Advanced Institute of Science and Technology. The simulator consists of a bicycle, a Stewart platform, a Magneto-Rheological handle and a pedal resistance system to generate motion feelings; the real-time visual simulator and the projection system; the sub-controllers and the integrating control network.
Training war fighters how to maneuver a submarine is very important, but the use of real submarin... more Training war fighters how to maneuver a submarine is very important, but the use of real submarines in such training is expensive and hindered by regional and temporal limitations. Modeling and sim-ulation (M&S) can be a good alternative to costly training. However, the use of existing M&S for submarines has limitations. For instance, the commercial software and hardware need to be kept in a secure place. Depending on the location of the protected software, war fighters may travel far and take a considerable amount of time to get to these places. Long-distance travel also means they have a limited amount of time to train on the M&S machines. Furthermore, many types of M&S have only a one-channel display system, which reduces immersiveness. Another problem is that few heterogeneous simulators can be used as an integrated system. One solution to these prob-lems involves the use of extensible 3D (X3D) graphics, a platform-independent and open standard graphic file format, which can be ...
The 26th International Conference on 3D Web Technology
are two approaches for creating the models: pre-reconstruction and real-time reconstruction. The ... more are two approaches for creating the models: pre-reconstruction and real-time reconstruction. The pre-reconstruction approach takes considerable time to create polygon meshes precisely, and the realtime reconstruction approach requires a considerable time to install numerous sensors to perform accurate 3D scanning. In addition, these approaches are difficult to be used on the collaboration in a location beyond the reconstructed space, making them impractical to an actual XR collaboration. The approach proposed in this study separates the objects that form the physical workspace into OOI and AO, models only the OOI as a polygon mesh in advance, and reconstructs the AO into a point cloud using light detection and ranging technology for collaboration. The reconstructed point cloud is shared with remote collaborators through WebRTC, a webbased peer-to-peer networking technology with low latency. Each remote collaborator collects the delivered point cloud to form a virtual space, so that they can intuitively understand the situation at a local site. Because our approach does not create polygon meshes for all objects existing at the local site, we can save time to prepare
2020 IEEE International Conference on Multisensor Fusion and Integration for Intelligent Systems (MFI), 2020
In a rapidly aging society, like in South Korea, the number of Alzheimer’s Disease (AD) patients ... more In a rapidly aging society, like in South Korea, the number of Alzheimer’s Disease (AD) patients is a significant public health problem, and the need for specialized healthcare centers is in high demand. Healthcare providers generally rely on caregivers (CG) for elderly persons with AD to monitor and help them in their daily activities. K-Log Centre is a healthcare provider located in Korea to help AD patients meet their daily needs with assistance from CG in the center. The CG’S in the K-Log Centre need to attend the patients’ unique demands and everyday essentials for long-term care. Moreover, the CG also describes and logs the day-to-day activities in Activities of Daily Living (ADL) log, which comprises various events in detail. The CG’s logging activities can overburden their work, leading to appalling results like suffering quality of elderly care and hiring additional CG’s to maintain the quality of care and a negative feedback cycle. In this paper, we have analyzed this impe...
It is easy to get lost while browsing and navigating spatiotemporal content, and the problem is e... more It is easy to get lost while browsing and navigating spatiotemporal content, and the problem is exacerbated by the exponential growth of geospatial data with mobile phones and tablets. In this paper, we propose a continuous method of transition visualization with zooming and panning interaction of the maps and timelines on touch-based devices that maintains the spatial and temporal context of spatiotemporal content. Keywords: Spatiotemporal content, level-of-detail, zoom and pan, immersive visual interaction. Index Terms: I.3.6 [Computer Graphics]: Methodology and techniques—Interaction Techniques; H.5.2 [Information Interfaces and Presentation]: User Interfaces—Graphical User Interfaces (GUI)
Due to COVID-19, people have to adapt to the new lifestyle until scientists develop a permanent s... more Due to COVID-19, people have to adapt to the new lifestyle until scientists develop a permanent solution for this pandemic. Monitoring the respiration rate is very important for a COVID-infected person because the Coronavirus infects the pulmonary system of the person. Two problems that arise while monitoring the breath rate are: sensors are contact based and expensive for mass deployment. A conventional wearable breath rate monitoring system burdens the COVID-affected patient and exposes the caregivers to possible transmission. A contactless low-cost breath monitoring system is required, which monitors and records the breath rate continuously. This paper proposes a breath rate monitoring system called COVID-Beat, a wireless, low-cost, and contactless Wi-Fi-based continuous breath monitoring system. This sensor is developed using off-the-shelf commonly available embedded Internet of Thing device ESP32, and the performance is validated by conducting extensive experimentation. The bre...
The 25th International Conference on 3D Web Technology
Figure 1: A unified XR content representation (middle) and its rendered results in VR (left) and ... more Figure 1: A unified XR content representation (middle) and its rendered results in VR (left) and AR (right). (1) is a virtual object group, which is represented by a wxr-group tag in the code, containing three virtual objects ((3), (4), and (5)). (2) is an ar-target attribute, which makes the wxr-group element work as an AR anchor as well, and its value is a URL that indicates the feature data. The feature data is a string image of '3624-5P' and is attached to the surface of the real handle (right). (3), (4), and (5) are virtual objects of the handle, curved arrow, and annotation, respectively. These virtual objects are rendered normally in VR (left) and augmented in AR (right).
Many studies have consistently proven that repeatedly watching virtual reality (VR) content can r... more Many studies have consistently proven that repeatedly watching virtual reality (VR) content can reduce cybersickness. Moreover, the discomfort level decreases when the VR content includes an unusual orientation, such as an inverted scene. However, few studies have investigated the physiological changes during these experiences. The present study aimed to identify psychophysiological correlates, especially the neural processing, of cybersickness. Twenty participants experienced two types of VR orientation (upright and inverted), which were repeated three times. During the experience, we recorded the participants’ subjective levels of discomfort, brain waves, cardiac signals, and eye trajectories. We performed a heartbeat-evoked potential (HEP) analysis to elucidate the cortical activity of heartbeats while experiencing cybersickness. The results showed that the severity of cybersickness decreased as the participants repeatedly watched the VR content. The participants also reported le...
본 발명은 비디오 게임기 및 컴퓨터 게임 같은 엔터테인먼트 정보기기, 지형 공간 정보를 표현하는 정보기기 또는 컴퓨터 그래픽을 이용한 3차원 렌더링을 수행하는 정보기기에 적용... more 본 발명은 비디오 게임기 및 컴퓨터 게임 같은 엔터테인먼트 정보기기, 지형 공간 정보를 표현하는 정보기기 또는 컴퓨터 그래픽을 이용한 3차원 렌더링을 수행하는 정보기기에 적용되는 기술로서, 대상물을 표면으로부터 돌출되도록 표현하는 돌출 변위 매핑 방법에 관한 것이다. 이 발명에 따른 돌출 변위 매핑 방법은, 변위정보에 의해 정의되는 돌출된 물체의 표면과 관찰자 시선과의 교점을 검색하 여 상기 돌출된 물체 형상을 상기 폴리곤 면에 표시하는 교점검색단계와; 상기 폴리곤 면을 추가하여 상기 폴리곤 면의 경 계를 벗어나는 초과분에 해당하는 상기 돌출된 물체 형상을 상기 추가 폴리곤 면에 표시하는 초과분표시단계와; 상기 돌출 된 물체 형상 중 급격한 경사면을 검출하는 급격경사면검출단계와; 상기 급격한 경사면에 추가 텍스처를 표현하는 급격경 사면보정단계를 포함한다.
이 발명은 컨테이너 하우스 형태로 제작하여 설치현장으로 이송한 후 전원 공급만으로 간단하게 이용이 가능하며, 공간적인 제약이 없이 이동이 가능한 이동식 몰입형 가상환경제공 시... more 이 발명은 컨테이너 하우스 형태로 제작하여 설치현장으로 이송한 후 전원 공급만으로 간단하게 이용이 가능하며, 공간적인 제약이 없이 이동이 가능한 이동식 몰입형 가상환경제공 시스템에 관한 것이다. 이 발명은 이동이 가능한 공간에 멀티채널의 고해상도 몰입형 디스플레이 시스템과 공조 시스템을 겸비하여 몰입형 가상환 경을 제공할 수 있어, 설치 장소에 별도의 공사를 필요로 하지 않고, 간단히 운반하여 설치하는 것만으로 사용이 가능하다. 또한,공사현장등과같이가변적인환경또는자주변하는환경에빠르고다양하게적용할수있도 록 필요에 따라 이동식 몰입형 가상환경의 확장이 가능하며, 더 나아가 내부의 고해상도 몰입형 디스플레이 채널 수와 구성의 변경이 용이하고, 공간의 자유로운 구성이 가능하다.
2019 IEEE International Conference on Computational Science and Engineering (CSE) and IEEE International Conference on Embedded and Ubiquitous Computing (EUC), 2019
The advent of superior research and advances in medicine and healthcare have led to an increase i... more The advent of superior research and advances in medicine and healthcare have led to an increase in life expectancy of humans increasing the aging population in many countries. Due to the rapid cost-to-performance ratio of the Internet of Things (IoT), many sectors are adopting IoT from agriculture to healthcare and daily life applications; monitoring elderly patients pervasively with IoT can improve elderly care while minimizing caregivers' effort. Furthermore transparent and uninterrupted monitoring by caregivers helps them finding patterns in elderly patients before precarious incidents, costing much more to care. Ambient Assisted Living (AAL) is a term that indicates the concept of improving wellness and health conditions of older adults. In the current scenario, AAL extends to learning the elderly behavior by caregivers to avoid accidents in the future. In this context, KLog-Home project is being carried out as an initiative deployed to an elderly care home to monitor the elderly inhabitants continuously to help caregivers get notified of critical events and act instantly to avoid fatal incidents. KLog-Home enriches the concept of AAL with videos enabling, Video Assisted Ambient Living (VAAL). This multi-modal scenario is achieved by leveraging the technological benefits from IoT and communication technologies and envisioning a solution to provide ubiquitous care to senior people while enabling them to live an independent, safe and secure life.
2017 IEEE International Conference on Consumer Electronics (ICCE), 2017
Although internet of things (IoTs) devices are attractive for making our life smarter, we need to... more Although internet of things (IoTs) devices are attractive for making our life smarter, we need to replace existing equipment with IoT devices to connect, and this presents a cost problem. We propose a webized augmented reality mashup for legacy things that connects existing web services with things without the additional costs of replacing existing equipment.
Proceedings 2001 ICRA. IEEE International Conference on Robotics and Automation (Cat. No.01CH37164), 2001
This paper presents key technologies and system integration issues of the KAIST interactive bicyc... more This paper presents key technologies and system integration issues of the KAIST interactive bicycle simulator. The rider on the bicycle feels the motion and has the visual experience as if he/she is riding in the campus of the Korea Advanced Institute of Science and Technology. The simulator consists of a bicycle, a Stewart platform, a Magneto-Rheological handle and a pedal resistance system to generate motion feelings; the real-time visual simulator and the projection system; the sub-controllers and the integrating control network.
Training war fighters how to maneuver a submarine is very important, but the use of real submarin... more Training war fighters how to maneuver a submarine is very important, but the use of real submarines in such training is expensive and hindered by regional and temporal limitations. Modeling and sim-ulation (M&S) can be a good alternative to costly training. However, the use of existing M&S for submarines has limitations. For instance, the commercial software and hardware need to be kept in a secure place. Depending on the location of the protected software, war fighters may travel far and take a considerable amount of time to get to these places. Long-distance travel also means they have a limited amount of time to train on the M&S machines. Furthermore, many types of M&S have only a one-channel display system, which reduces immersiveness. Another problem is that few heterogeneous simulators can be used as an integrated system. One solution to these prob-lems involves the use of extensible 3D (X3D) graphics, a platform-independent and open standard graphic file format, which can be ...
The 26th International Conference on 3D Web Technology
are two approaches for creating the models: pre-reconstruction and real-time reconstruction. The ... more are two approaches for creating the models: pre-reconstruction and real-time reconstruction. The pre-reconstruction approach takes considerable time to create polygon meshes precisely, and the realtime reconstruction approach requires a considerable time to install numerous sensors to perform accurate 3D scanning. In addition, these approaches are difficult to be used on the collaboration in a location beyond the reconstructed space, making them impractical to an actual XR collaboration. The approach proposed in this study separates the objects that form the physical workspace into OOI and AO, models only the OOI as a polygon mesh in advance, and reconstructs the AO into a point cloud using light detection and ranging technology for collaboration. The reconstructed point cloud is shared with remote collaborators through WebRTC, a webbased peer-to-peer networking technology with low latency. Each remote collaborator collects the delivered point cloud to form a virtual space, so that they can intuitively understand the situation at a local site. Because our approach does not create polygon meshes for all objects existing at the local site, we can save time to prepare
2020 IEEE International Conference on Multisensor Fusion and Integration for Intelligent Systems (MFI), 2020
In a rapidly aging society, like in South Korea, the number of Alzheimer’s Disease (AD) patients ... more In a rapidly aging society, like in South Korea, the number of Alzheimer’s Disease (AD) patients is a significant public health problem, and the need for specialized healthcare centers is in high demand. Healthcare providers generally rely on caregivers (CG) for elderly persons with AD to monitor and help them in their daily activities. K-Log Centre is a healthcare provider located in Korea to help AD patients meet their daily needs with assistance from CG in the center. The CG’S in the K-Log Centre need to attend the patients’ unique demands and everyday essentials for long-term care. Moreover, the CG also describes and logs the day-to-day activities in Activities of Daily Living (ADL) log, which comprises various events in detail. The CG’s logging activities can overburden their work, leading to appalling results like suffering quality of elderly care and hiring additional CG’s to maintain the quality of care and a negative feedback cycle. In this paper, we have analyzed this impe...
It is easy to get lost while browsing and navigating spatiotemporal content, and the problem is e... more It is easy to get lost while browsing and navigating spatiotemporal content, and the problem is exacerbated by the exponential growth of geospatial data with mobile phones and tablets. In this paper, we propose a continuous method of transition visualization with zooming and panning interaction of the maps and timelines on touch-based devices that maintains the spatial and temporal context of spatiotemporal content. Keywords: Spatiotemporal content, level-of-detail, zoom and pan, immersive visual interaction. Index Terms: I.3.6 [Computer Graphics]: Methodology and techniques—Interaction Techniques; H.5.2 [Information Interfaces and Presentation]: User Interfaces—Graphical User Interfaces (GUI)
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Papers by Byounghyun Yoo