From Data to Actionable Knowledge: Big Data Challenges in the Web of Things

to multimedia content (images, video, and audio) on a variety of platforms (enterprise, social media, and sensors). One of the fastestgrowing types of data relates to physical observations, measurements, and occurrences in the real world. The growth of physical world data collection and communication is supported by low-cost sensor devices, such as wireless sensor nodes that can be deployed in different environments, smartphones, and other network-enabled appliances. This trend will only accelerate, as it’s estimated that by 2020 more than 50 billion devices will be connected to the Internet (http://share.cisco. com/internet-of-things.html) Extending the current Internet and providing connections and communication between physical objects and devices, or “things,” is described under the general term of Internet of Things (IoT). Another oftenused term is Internet of Everything (IOE), which recognizes the key role of people or citizen sensing, such as through social media, to complement physical sensing implied by IoT. Integrating the real-world data into the Web and providing Web-based interactions with the IoT resources is also often discussed under the umbrella term of Web of Things (WoT). Data collected by different sensors and devices have various types (such From Data to Actionable Knowledge: Big Data Challenges in the Web of Things