O'Reilly logo

Context-Aware Computing by De Gruyter

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

7Detecting Context Events

Abstract: Context information can be either low level (e.g., raw sensor data) or high level (e.g., posture and activity of a person). High-level context information can be inferred from low-level context information, and its semantics can be explicated through context events. Querying of high-level context information involves event detection from low-level context data. As a large portion of low-level context data sources are sensors, this chapter focuses on high-performance context event detection from sensory data coming as streams. Stream records indexing and condensed composition, magnified with parallel detection mechanisms, are discussed.

7.1Integration of Stream and Event Processing

Although event processing ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required