Topics: more AI Expert systems. Genetic algorithms. Neural Networks. Review for midterm

Catch-up Anyone try duolingo? Anything else? Reactions to presentations?

Artificial Intelligence is an old-fashioned term. Complaint was that anything that worked ceased to be termed AI and so AI never had successes.

Expert systems [also old-fashioned term] Collect large number of items if A, B, … true, then do X, and/or declare V, W, … to be true. The ES engine keeps track of what is known and determines a next step. One of the first applications was for medical diagnosis: Mycin Posting / talk possibility

Note so-called check lists for medical procedures are considered a best practice.

Abominable abdominal report My experience in about 1970: study large set of symptoms and initial and confirmed diagnoses Critical reaction/finding for me what that the PI very much did not want a natural language interface. Material was too technical.

Genetic algorithms Based on notion of DNA combining and successful strands lasting… Needs a way to encode proposed solutions to [your] problem. Combine, perhaps with some random effects, perhaps based on goodness of solution. Repeat. Inspired by chromosomes and evolution.

Reactions to reading What do you think?

Neural networks Inspired by general idea that new connections are established in the brain. Again, need to encode candidate solutions. Try connections. If connections work or work better, than the connection is given more strength; otherwise less strength. Iterate: making new connections.

Reflection general versus specific approaches to problems Another general solution is to bring in people or evidence of some kind. Cloud sourcing. –Part of Google search is to establish page-rank based on links from sites to sites. Note: new idea is to feature links from 'your friends'…. –Duolingo –Note: captcha using 2 clues assumes that if you got 'theirs' correct, then it assumes you probably were correct on the other one. Does 'take a vote'.

Midterm review Questions?