The Experts below are selected from a list of 90 Experts worldwide ranked by ideXlab platform
Dijkstra, Tom A. - One of the best experts on this subject based on the ideXlab platform.
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Satellite-based emergency mapping using optical Imagery: experience and reflections from the 2015 Nepal earthquakes
'Copernicus GmbH', 2018Co-Authors: Williams, Jack G., Rosser, Nick J., Kincey, Mark E., Benjamin Jessica, Oven Katie, Densmore, Alexander L., Milledge, David G., Robinson, Tom R., Jordan, Colm A., Dijkstra, Tom A.Abstract:Landslides triggered by large earthquakes in mountainous regions contribute significantly to overall earthquake losses and pose a major secondary hazard that can persist for months or years. While scientific investigations of coseismic landsliding are increasingly common, there is no protocol for rapid (hours-to-days) humanitarian-facing landslide assessment and no published recognition of what is possible and what is useful to compile immediately after the event. Drawing on the 2015 Mw 7.8 Gorkha earthquake in Nepal, we consider how quickly a landslide assessment based upon manual satellite-based emergency mapping (SEM) can be realistically achieved and review the decisions taken by analysts to ascertain the timeliness and type of useful information that can be generated. We find that, at present, many forms of landslide assessment are too slow to generate relative to the speed of a humanitarian response, despite increasingly rapid access to high-Quality Imagery. Importantly, the value of information on landslides evolves rapidly as a disaster response develops, so identifying the purpose, timescales, and end users of a post-earthquake landslide assessment is essential to inform the approach taken. It is clear that discussions are needed on the form and timing of landslide assessments, and how best to present and share this information, before rather than after an earthquake strikes. In this paper, we share the lessons learned from the Gorkha earthquake, with the aim of informing the approach taken by scientists to understand the evolving landslide hazard in future events and the expectations of the humanitarian community involved in disaster response
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Satellite-based emergency mapping using optical Imagery: experience and reflections from the 2015 Nepal earthquakes
'Copernicus GmbH', 2018Co-Authors: Williams, Jack G., Rosser, Nick J., Kincey, Mark E., Benjamin Jessica, Densmore, Alexander L., Milledge, David G., Robinson, Tom R., Jordan, Colm A., Oven, Katie J., Dijkstra, Tom A.Abstract:Landslides triggered by large earthquakes in mountainous regions contribute significantly to overall earthquake losses and pose a major secondary hazard that can persist for months or years. While scientific investigations of coseismic landsliding are increasingly common, there is no protocol for rapid (hours-to-days) humanitarian-facing landslide assessment and no published recognition of what is possible and what is useful to compile immediately after the event. Drawing on the 2015 Mw 7.8 Gorkha earthquake in Nepal, we consider how quickly a landslide assessment based upon manual satellite-based emergency mapping (SEM) can be realistically achieved and review the decisions taken by analysts to ascertain the timeliness and type of useful information that can be generated. We find that, at present, many forms of landslide assessment are too slow to generate relative to the speed of a humanitarian response, despite increasingly rapid access to high-Quality Imagery. Importantly, the value of information on landslides evolves rapidly as a disaster response develops, so identifying the purpose, timescales, and end users of a post-earthquake landslide assessment is essential to inform the approach taken. It is clear that discussions are needed on the form and timing of landslide assessments, and how best to present and share this information, before rather than after an earthquake strikes. In this paper, we share the lessons learned from the Gorkha earthquake, with the aim of informing the approach taken by scientists to understand the evolving landslide hazard in future events and the expectations of the humanitarian community involved in disaster response. Please read the corrigendum first before accessing the articl
David Chu - One of the best experts on this subject based on the ideXlab platform.
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poster mobile virtual reality for head mounted displays with interactive streaming video and likelihood based foveation
International Conference on Mobile Systems Applications and Services, 2016Co-Authors: Eduardo Cuervo, David ChuAbstract:Immersive virtual reality has long been an aspiration of many. For a truly immersive VR experience, three properties are essential: Quality, responsiveness and mobility. By Quality, we mean that realistic and life-like visual portrayals in a virtual environment heighten our sense of immersion. By responsiveness, we mean that any motion, especially of the head, must be reflected as quickly as possible in visual feedback because ocular proprioception sensitivity is very high. By mobility, we mean that we ought to be able to move untethered in physical space, free to explore our virtual world. Unfortunately mobile devices like phones are tablets are power-constrained and cannot produce acceptable framerate. While cloud offloading allows them to deliver high-Quality and framerate it places high bandwidth requirements and introduces an unacceptable amount of latency. This demo introduces Matia, a stereo HMD system that simultaneously attains Quality, responsiveness and mobility. Matia achieves this by offloading rendering work to a highend GPU across the WAN. The HMD client is mobile and only requires a low-end GPU, yet receives high Quality Imagery. To overcome WAN latencies, Matia borrows speculative execution techniques inspired by previous work Outatime [1]. However, speculative execution alone is insufficient. This is because HMD sensitivities are substantially more stringent along several key dimensions: responsiveness and Quality.These factors suggest that we ought to greatly benefit from maximally utilizing all available bandwidth between client and server to deliver the highest resolution Imagery possible. At the same time, any latency or bandwidth changes must be handled very responsively, lest they deteriorate the user experience and induce simulator sickness. To get the highest possible resolution while remaining responsive to network changes, Matia employs panoramic stereo video and likelihood-based foveation. Specifically, Matia renders a wide field-of-view (FOV) panoramic stereo video. In turn, any possible stereo view (e.g., due to unexpected head movement or network fluctuations) can be generated. Matia then foveates this panorama by reallocating pixels to areas where the user is most likely to look (Maximum Likelyhood View). We divide our panoramic video into three regions described by their image Quality: High, Medium and Low. Embedded within is a convex-like optimizer that constantly adapts to real-time data analysis of user head movement and network conditions to figure out the most fruitful foveation configuration, on expectation of these regions. As a result, we expect to achieve high Quality immersiveness in the common case, yet still deliver gracefully degraded experiences in case of network degradation. At the same time, Matia greatly expands the scope of viable HMD content while requiring only modest fixed function computation on the HMD device. In this demo we will show Matia running on an Intel Compute Stick driving an Oculus DK2. Our demo shows a scene so graphically detailed that the compute stick is unable to handle it fast enough without offloading it to a server. During the demo, users will be able to observe the high responsiveness and Quality of the image even after introducing variable amounts of bandwidth and latency.
Williams, Jack G. - One of the best experts on this subject based on the ideXlab platform.
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Satellite-based emergency mapping using optical Imagery: experience and reflections from the 2015 Nepal earthquakes
'Copernicus GmbH', 2018Co-Authors: Williams, Jack G., Rosser, Nick J., Kincey, Mark E., Benjamin Jessica, Oven Katie, Densmore, Alexander L., Milledge, David G., Robinson, Tom R., Jordan, Colm A., Dijkstra, Tom A.Abstract:Landslides triggered by large earthquakes in mountainous regions contribute significantly to overall earthquake losses and pose a major secondary hazard that can persist for months or years. While scientific investigations of coseismic landsliding are increasingly common, there is no protocol for rapid (hours-to-days) humanitarian-facing landslide assessment and no published recognition of what is possible and what is useful to compile immediately after the event. Drawing on the 2015 Mw 7.8 Gorkha earthquake in Nepal, we consider how quickly a landslide assessment based upon manual satellite-based emergency mapping (SEM) can be realistically achieved and review the decisions taken by analysts to ascertain the timeliness and type of useful information that can be generated. We find that, at present, many forms of landslide assessment are too slow to generate relative to the speed of a humanitarian response, despite increasingly rapid access to high-Quality Imagery. Importantly, the value of information on landslides evolves rapidly as a disaster response develops, so identifying the purpose, timescales, and end users of a post-earthquake landslide assessment is essential to inform the approach taken. It is clear that discussions are needed on the form and timing of landslide assessments, and how best to present and share this information, before rather than after an earthquake strikes. In this paper, we share the lessons learned from the Gorkha earthquake, with the aim of informing the approach taken by scientists to understand the evolving landslide hazard in future events and the expectations of the humanitarian community involved in disaster response
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Satellite-based emergency mapping using optical Imagery: experience and reflections from the 2015 Nepal earthquakes
'Copernicus GmbH', 2018Co-Authors: Williams, Jack G., Rosser, Nick J., Kincey, Mark E., Benjamin Jessica, Densmore, Alexander L., Milledge, David G., Robinson, Tom R., Jordan, Colm A., Oven, Katie J., Dijkstra, Tom A.Abstract:Landslides triggered by large earthquakes in mountainous regions contribute significantly to overall earthquake losses and pose a major secondary hazard that can persist for months or years. While scientific investigations of coseismic landsliding are increasingly common, there is no protocol for rapid (hours-to-days) humanitarian-facing landslide assessment and no published recognition of what is possible and what is useful to compile immediately after the event. Drawing on the 2015 Mw 7.8 Gorkha earthquake in Nepal, we consider how quickly a landslide assessment based upon manual satellite-based emergency mapping (SEM) can be realistically achieved and review the decisions taken by analysts to ascertain the timeliness and type of useful information that can be generated. We find that, at present, many forms of landslide assessment are too slow to generate relative to the speed of a humanitarian response, despite increasingly rapid access to high-Quality Imagery. Importantly, the value of information on landslides evolves rapidly as a disaster response develops, so identifying the purpose, timescales, and end users of a post-earthquake landslide assessment is essential to inform the approach taken. It is clear that discussions are needed on the form and timing of landslide assessments, and how best to present and share this information, before rather than after an earthquake strikes. In this paper, we share the lessons learned from the Gorkha earthquake, with the aim of informing the approach taken by scientists to understand the evolving landslide hazard in future events and the expectations of the humanitarian community involved in disaster response. Please read the corrigendum first before accessing the articl
Kincey, Mark E. - One of the best experts on this subject based on the ideXlab platform.
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Satellite-based emergency mapping using optical Imagery: experience and reflections from the 2015 Nepal earthquakes
'Copernicus GmbH', 2018Co-Authors: Williams, Jack G., Rosser, Nick J., Kincey, Mark E., Benjamin Jessica, Oven Katie, Densmore, Alexander L., Milledge, David G., Robinson, Tom R., Jordan, Colm A., Dijkstra, Tom A.Abstract:Landslides triggered by large earthquakes in mountainous regions contribute significantly to overall earthquake losses and pose a major secondary hazard that can persist for months or years. While scientific investigations of coseismic landsliding are increasingly common, there is no protocol for rapid (hours-to-days) humanitarian-facing landslide assessment and no published recognition of what is possible and what is useful to compile immediately after the event. Drawing on the 2015 Mw 7.8 Gorkha earthquake in Nepal, we consider how quickly a landslide assessment based upon manual satellite-based emergency mapping (SEM) can be realistically achieved and review the decisions taken by analysts to ascertain the timeliness and type of useful information that can be generated. We find that, at present, many forms of landslide assessment are too slow to generate relative to the speed of a humanitarian response, despite increasingly rapid access to high-Quality Imagery. Importantly, the value of information on landslides evolves rapidly as a disaster response develops, so identifying the purpose, timescales, and end users of a post-earthquake landslide assessment is essential to inform the approach taken. It is clear that discussions are needed on the form and timing of landslide assessments, and how best to present and share this information, before rather than after an earthquake strikes. In this paper, we share the lessons learned from the Gorkha earthquake, with the aim of informing the approach taken by scientists to understand the evolving landslide hazard in future events and the expectations of the humanitarian community involved in disaster response
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Satellite-based emergency mapping using optical Imagery: experience and reflections from the 2015 Nepal earthquakes
'Copernicus GmbH', 2018Co-Authors: Williams, Jack G., Rosser, Nick J., Kincey, Mark E., Benjamin Jessica, Densmore, Alexander L., Milledge, David G., Robinson, Tom R., Jordan, Colm A., Oven, Katie J., Dijkstra, Tom A.Abstract:Landslides triggered by large earthquakes in mountainous regions contribute significantly to overall earthquake losses and pose a major secondary hazard that can persist for months or years. While scientific investigations of coseismic landsliding are increasingly common, there is no protocol for rapid (hours-to-days) humanitarian-facing landslide assessment and no published recognition of what is possible and what is useful to compile immediately after the event. Drawing on the 2015 Mw 7.8 Gorkha earthquake in Nepal, we consider how quickly a landslide assessment based upon manual satellite-based emergency mapping (SEM) can be realistically achieved and review the decisions taken by analysts to ascertain the timeliness and type of useful information that can be generated. We find that, at present, many forms of landslide assessment are too slow to generate relative to the speed of a humanitarian response, despite increasingly rapid access to high-Quality Imagery. Importantly, the value of information on landslides evolves rapidly as a disaster response develops, so identifying the purpose, timescales, and end users of a post-earthquake landslide assessment is essential to inform the approach taken. It is clear that discussions are needed on the form and timing of landslide assessments, and how best to present and share this information, before rather than after an earthquake strikes. In this paper, we share the lessons learned from the Gorkha earthquake, with the aim of informing the approach taken by scientists to understand the evolving landslide hazard in future events and the expectations of the humanitarian community involved in disaster response. Please read the corrigendum first before accessing the articl
Jordan, Colm A. - One of the best experts on this subject based on the ideXlab platform.
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Satellite-based emergency mapping using optical Imagery: experience and reflections from the 2015 Nepal earthquakes
'Copernicus GmbH', 2018Co-Authors: Williams, Jack G., Rosser, Nick J., Kincey, Mark E., Benjamin Jessica, Oven Katie, Densmore, Alexander L., Milledge, David G., Robinson, Tom R., Jordan, Colm A., Dijkstra, Tom A.Abstract:Landslides triggered by large earthquakes in mountainous regions contribute significantly to overall earthquake losses and pose a major secondary hazard that can persist for months or years. While scientific investigations of coseismic landsliding are increasingly common, there is no protocol for rapid (hours-to-days) humanitarian-facing landslide assessment and no published recognition of what is possible and what is useful to compile immediately after the event. Drawing on the 2015 Mw 7.8 Gorkha earthquake in Nepal, we consider how quickly a landslide assessment based upon manual satellite-based emergency mapping (SEM) can be realistically achieved and review the decisions taken by analysts to ascertain the timeliness and type of useful information that can be generated. We find that, at present, many forms of landslide assessment are too slow to generate relative to the speed of a humanitarian response, despite increasingly rapid access to high-Quality Imagery. Importantly, the value of information on landslides evolves rapidly as a disaster response develops, so identifying the purpose, timescales, and end users of a post-earthquake landslide assessment is essential to inform the approach taken. It is clear that discussions are needed on the form and timing of landslide assessments, and how best to present and share this information, before rather than after an earthquake strikes. In this paper, we share the lessons learned from the Gorkha earthquake, with the aim of informing the approach taken by scientists to understand the evolving landslide hazard in future events and the expectations of the humanitarian community involved in disaster response
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Satellite-based emergency mapping using optical Imagery: experience and reflections from the 2015 Nepal earthquakes
'Copernicus GmbH', 2018Co-Authors: Williams, Jack G., Rosser, Nick J., Kincey, Mark E., Benjamin Jessica, Densmore, Alexander L., Milledge, David G., Robinson, Tom R., Jordan, Colm A., Oven, Katie J., Dijkstra, Tom A.Abstract:Landslides triggered by large earthquakes in mountainous regions contribute significantly to overall earthquake losses and pose a major secondary hazard that can persist for months or years. While scientific investigations of coseismic landsliding are increasingly common, there is no protocol for rapid (hours-to-days) humanitarian-facing landslide assessment and no published recognition of what is possible and what is useful to compile immediately after the event. Drawing on the 2015 Mw 7.8 Gorkha earthquake in Nepal, we consider how quickly a landslide assessment based upon manual satellite-based emergency mapping (SEM) can be realistically achieved and review the decisions taken by analysts to ascertain the timeliness and type of useful information that can be generated. We find that, at present, many forms of landslide assessment are too slow to generate relative to the speed of a humanitarian response, despite increasingly rapid access to high-Quality Imagery. Importantly, the value of information on landslides evolves rapidly as a disaster response develops, so identifying the purpose, timescales, and end users of a post-earthquake landslide assessment is essential to inform the approach taken. It is clear that discussions are needed on the form and timing of landslide assessments, and how best to present and share this information, before rather than after an earthquake strikes. In this paper, we share the lessons learned from the Gorkha earthquake, with the aim of informing the approach taken by scientists to understand the evolving landslide hazard in future events and the expectations of the humanitarian community involved in disaster response. Please read the corrigendum first before accessing the articl
