The Nineteenth International FLAIRS Conference (FLAIRS-19) was held 11-13 May 2006 at the Crowne Plaza Melbourne Oceanfront Hotel in Melbourne Beach, FL. The general cochairs were Philip Chan and Debasis Mitra, from the Florida Institute of Technology. The program cochairs were Geoff Sutcliffe, from the University of Miami, and Randy Goebel, from the University of Alberta. The special tracks chair was Barry O'Sullivan, from University College Cork. The conference was attended by almost 200 AI researchers from around the world.

Following successful special tracks on case-based reasoning at FLAIRS over the past seven years, we invited papers for the Eighth Special Track on CBR at the 22nd International FLAIRS Conference. Case-based reasoning is an AI problem solving and analysis methodology that retrieves and adapts previous experiences to fit new contexts. This forum is intended to gather AI researchers and practitioners with an interest in CBR to present and discuss developments in CBR theory and application. Submission topics included foundations of CBR; methods for CBR (such as representation, indexing, retrieval, adaptation); evaluation methods for CBR systems and integrations; practical applications of CBR; textual CBR; CBR and creativity; CBR and design; distributed CBR; case based maintenance; spatiotemporal CBR; CBR in the health sciences; CBR integrations; case based planning; and CBR and games. The invited speaker for the special track for 2009 is Ashok Goel from the Georgia Institute of Technology, USA.

This volume contains the papers presented at the 22nd International FLAIRS Conference (FLAIRS-22) held 19-21 May 2009 on Sanibel Island, Florida, USA. The call for papers attracted 158 paper submissions, 40 to the general conference and 118 to the 10 special tracks. Over 80 percent of the papers were reviewed by at least four reviewers, and all papers by at least three. Reviewing was coordinated by the program committees of the general conference and the special tracks. The program committees finally accepted the 85 papers that appear in these proceedings, all as presented papers (21 from the general conference and 64 from the special tracks) and 29 as poster papers (6 from the general conference and 23 from the special tracks).

The special tracks chair was Barry O'Sullivan, FLAIRS Conference (FLAIRS-19) was Reversals via Representational Refinements"; held 11-13 May 2006 at the Crowne Bob Morris of the NASA Ames The 20th International FLAIRS Conference (FLAIRS-20) will be held May 7 - 9, 2007 at the Casa Marina Resort, which is directly on the beach in Key West, Florida, USA. FLAIRS-20 will feature technical papers, special tracks, and invited speakers on artificial intelligence. The conference is hosted by the Florida Artificial Intelligence Research General Chair Society, in cooperation with AAAI. Geoff Sutcliffe In addition to the general conference, FLAIRS offers numerous special conference tracks. Special tracks provide researchers in focused areas the opportunity to meet and present University of Miami their work.