Virtual Sensors: Abstracting Data from Physical Sensors
WOWMOM '06 Proceedings of the 2006 International Symposium on on World of Wireless, Mobile and Multimedia Networks
Building virtual sensors and actuators over logical neighborhoods
Proceedings of the international workshop on Middleware for sensor networks
Virtual Sensor Networks - A Resource Efficient Approach for Concurrent Applications
ITNG '07 Proceedings of the International Conference on Information Technology
The provenance of electronic data
Communications of the ACM - The psychology of security: why do good users make bad decisions?
Semantic Provenance for eScience: Managing the Deluge of Scientific Data
IEEE Internet Computing
Near-real-time precipitation virtual sensor using NEXRAD data
Proceedings of the 16th ACM SIGSPATIAL international conference on Advances in geographic information systems
An integrated system for publishing environmental observations data
Environmental Modelling & Software
Infrastructure for Data Processing in Large-Scale Interconnected Sensor Networks
MDM '07 Proceedings of the 2007 International Conference on Mobile Data Management
A new framework for on-demand virtualization, repurposing and fusion of heterogeneous sensors
CTS '09 Proceedings of the 2009 International Symposium on Collaborative Technologies and Systems
Service-oriented applications for environmental models: Reusable geospatial services
Environmental Modelling & Software
Semantic middleware for e-science knowledge spaces
Proceedings of the 7th International Workshop on Middleware for Grids, Clouds and e-Science
Generic integration of environmental decision support systems - state-of-the-art
Environmental Modelling & Software
Software sensors are a real alternative to true sensors
Environmental Modelling & Software
Putting humans in the loop: Social computing for Water Resources Management
Environmental Modelling & Software
| Hi-index | 0.00 |
With the advent of new instrumentation and sensors, more diverse types and increasing amounts of data are becoming available to environmental researchers and practitioners. However, accessing and integrating these data into forms usable for environmental analysis and modeling can be highly time-consuming and challenging, particularly in real time. For example, radar-rainfall data are a valuable resource for hydrologic modeling because of their high resolution and pervasive coverage. However, radar-rainfall data from the Next Generation Radar (NEXRAD) system continue to be underutilized outside of the operational environment because of limitations in access and availability of research-quality data products, especially in real time. This paper addresses these issues through the development of a prototype Web-based virtual sensor system at NCSA that creates real-time customized data streams from raw sensor data. These data streams are supported by metadata, including provenance information. The system uses workflow composition and publishing tools to facilitate creation and publication (as Web services) of user-created virtual sensors. To demonstrate the system, two case studies are presented. In the first case study, a network of point-based virtual precipitation sensors is deployed to analyze the relationship between radar-rainfall measurements, and in the second case study, a network of polygon-based virtual precipitation sensors is deployed to be used as input to urban flooding models. These case studies illustrate how, with the addition of some application-specific information, this general-purpose system can be utilized to provide customized real-time access to significant data resources such as the NEXRAD system. Additionally, the creation of new types of virtual sensors is discussed, using the example of virtual temperature sensors.