COIN / ACTIVE Summer School on Advanced Technologies for Knowledge Intensive Networked Organizations, Aachen 2010

Data from sensors and knowledge about sensor networks: why is it so hard to get?

author: Carolina Fortuna, Department of Communications Systems, Jožef Stefan Institute
published: Nov. 24, 2010, recorded: October 2010, views: 361

Slides

Slides
0:00	Why is sensor data so hard to get?
0:34	Jožef Stefan Institute
0:57	SensorLab
1:20	Outline
2:09	What is a "sensor"? - 1
2:53	What is a "sensor"? - 2
3:06	Sensor nodes vs computing devices - 1
4:52	Sensor nodes vs computing devices - 2
5:26	Aspects of the physical web
6:30	Wireless sensor networks (WSN)
7:37	Current state in WSN area
9:11	Wireless sensor nodes
10:12	Why WSNs are different?
11:21	Programing sensor nodes
12:22	Sensor deployments
12:58	European deployments
13:35	US deployments - 1
14:44	US deployments - 2
16:03	US deployments - 3
16:49	Federation of sensor deployments
18:32	What sensors are mounted on the nodes?
19:28	What to sense?
19:38	Existing technology - 1
19:53	Components and classification
20:54	Classification by processing and communication capability
21:50	Classification by processing units
22:17	Classification by clock frequency and memory
23:12	Classification by communication speed
24:16	Classification by antenna
24:35	Which processors and how advanced?
25:07	Which communication modules and frequencies?
25:47	Existing technology - 2
26:19	Existing technology - 3
26:27	Middleware
27:36	Embedded operating system
28:32	Classification
29:24	Main design features of embedded OS
30:07	Embedded OS classification by scheduling model
31:18	Embedded OS classification by system image
32:20	Embedded OS comparison
33:21	Protocol stack
34:22	Protocol stack implementation
34:59	Virtual machine
35:39	Classification of virtual machines
36:36	Virtual machine comparison
37:08	Are virtual machines necessary?
38:10	Existing technology - 4
38:30	Existing technology - 5
38:50	Sensor data and meta-data - 1
39:55	Sensor data and meta-data - 2
40:30	Vocabulary
41:57	Sensor ontologies
43:18	Representation languages
44:32	Processing engine
45:32	Semantic sensor web
46:18	Determining the level of comfort - 1
46:54	Determining the level of comfort - 2

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Description

Sensor is a material or passive device which changes its conductive properties according to a physical stimulus. sensor node is a small device that features sensors, a processing unit and a communication module. Sensor networks allow for automatic delivery of the infromation from our environment. Sensor deployments are performed by a number of European and US institutions. 112 types of sensor nodes, 118 types of processing units and 112 types of communication interfaces are identified in the research community. Sensor middleware supports the operation of the sensing-based applications. Sensor data includes measurements performed by sensors (pressure, luminance, noise, CO, CO2...). Sensor metadata is data about the sensor nodes or the sensor network.