Here are some of my recent talks

Talk at Berkeley about least jump enumerations
Queensland University paramaterized complexity
based around coding theory
Plenary lecture at Vienna on algorithmic randomness (Logic Colloquium)
Talk at CDMTCS, Auckland on presentations of reals
Invited seminar, Massey University, Palmerston randomness and triviality
Plenary talk at UCSD on Pi-0-1 classes for ASL annual meeting
Invited talk at special session AMS meeting in San Diego
Keynote talk at Asian Logic Meeting, Chongqing
(Algorithmic Randomness and Computability)
Nonapproximability and the minimob,
invited lecture at Auckland Computer Science, 2002
history.doc
Parameterized complexity for the skeptic, plenary lecture at IEEE Annual Conference on Computational Complexity (Aarhus)
Algorithmic randomness, invited seminar at
the University of Notre Dame
Presenting reals, plenary lecture at CCA, Cincinatti
Algoritmic randomness 2004, plenary lecture at the first
joint meeting of the NZMS and Israel Math society, VIC 2004
Algorithmic randomness, Auckland 2004
Recent progress in parametric complexity, Plenary lecture,
Developments in Language Theory, Auckland 2004
Algorithmic Randomness, UCLA Lecture for the opening
of their Logic Centre
Collatz Functions and Conway Games,
Colloquium/seminar, Auckland University, 2005
Effective presentations of Ideals in Computable
Rings, Auckland University seminar, 2006
Some new natural definable degrees, Plenary lecture,Theory and Applications of Models of Computation, Beijing, 2006
Notes for Singapore Lectures at Nanyang for Gifted Undergraduates and Junior College Students
First Lecture in Logic Colloquium 2006(Randomness)
Second Lecture in Logic Colloquium 2006(Randomness)
Third Lecture in Logic Colloquium 2006 (Decanter)
First Lecture in Singapore IMA Series(Randomness)
Second Lecture in Singapore IMA Series
Third Lecture in Singapore IMA Series
Fourth Lecture in Singapore IMA Series
Fifth Lecture in Singapore IMA Series
Talk for International Congress of Mathematicians
(Randomness)
Gainesville Lecture for CCA 2006
(Decanter and traceability)
Lecture at University of Florida on Ideals in Computable Rings
Colloquium Lecture to a general audience
(Auckland University)
on computability, complexity and history.
Colloquium Lecture to a general audience
(Queensland University)
on computability, complexity and history.
Talk at National University of Singapore, 2007,
Strong Jump Traceability and Variations.
Talk at Nanyang University(2007), Basic Parameterized Complexity I; Introduction and completeness.
Talk at Nangany University(2007), Basic Parameterized Complexity II: Positive techniques and speculations.
Plenary Lecture, First Joint Meeting of the
AMS and NZMS, Practical FPT and Foundations of Kernelization.
Talk at Wellington Town Hall, March 2009,
randomness.
More on Dimensions-Madison May 2009
Solovay Functions, Triviality and Tracing-
Asian Logic Conference, Singapore June 2009
When does a problem have a solution: a logician's and computability theorist's
view, Wellington, 2009.
Computability and Euclidean Functions-
Midwest Computability Seminar, May 2010, Chicago
New Directions and Open Questions (in
Algorithmic Randomness)
5th Computability and Randomness Conference, May 2010, Notre Dame
Degree Classes via Approximations; and Applications
Madison, June 2010
Degree Classes via Approximations; and Applications
Berkeley, November 2010
Generic Decision Complexity,
Singapore, November 2010
Yet More on Dimensions, Amsterdam, November 2010.
Parameterized Complexity, Postive Techniques, Kernelization, University of Western Australia, January 2011.
Generic Decision Complexity, CCR, Cape Town, 2011,
February 2011.
Algorithmic Randomness and Complexity (Colloquium
Lecture), Melbourne University, February, 2011.
Computably enumerable degrees realized in
Pi01 classes, Institute for Mathematical Sciences, Singapore, August 2011
A hierarchy of c.e. degrees, unifying classes, and natural definability, Oberwolfach February, 2012.
A Parameterized Complexity Tutorial I:
positive techniques, LATA 2012, A Coruna March 2012.
A Parameterized Complexity Tutorial II:
negative toolkit LATA 2012, A Coruna March 2012.
My Current Interests in Computation.
Isaac Newton Institute, Cambridge, March 2012.
Algorithmic Randomness and Complexity
University of Leicester, March 2012.
A Parameterized Complexity Tutorial I:
positive techniques, BCTCS, Manchester April 2012.
A Parameterized Complexity Tutorial II:
negative toolkit, BCTCS, Manchester April 2012.
Strong Jump Traceability I
The Incomputable, Chichley Hall, June 2012.
Notes on Parameterized Complexity,
Dagstuhl, June 2012.
Randomness, Computability and Mathematics,
CIE, How the World Computes, June 2012.
Resolute Sets and Initial Segment Complexity
(Preliminary Results), CCR 2012 Cambridge, July 2012.
Alan Turing and Computation
Santander, August 2012.
Randomness from Borel to Turing and into
the 21st Century,
Santander, August 2012.
The Finite Intersection Property and Computability Theory
Alan Turing and Computation (Colloquium Talk)
Alan Turing, the Birth of Computation, the Power of Mathematics
(Public Lecture), Wellington November 2012.
The talks below about the finite intersection property contained
an claim that there was a FIP bounding minimal
degree, and this no longer seems true, so I have fixed the talks,
where I still have them.
The Finite Intersection Property and Computability Theory,
Cornell University and Harvard/MIT, November 2012.
(Contains the flawed claim)
Recent Progress in Parameterized Upper and Lower Bounds,
Cornell University, November 2012.
Randomness from Borel through Turing and into the 21st Century,
Turing 100 Conference, Boston, November 2012.
The Finite Intersection Property and Computability Theory (revised version),
Midwest Computability Seminar, Chicago, November 2012.
Effectively Categorical Torsion Free Abelian Groups, Joint Meetings, San Diego, January 2013.
Basic Parameterized Complexity Primer, Joint Meetings, San Diego, January 2013.
My Mathematical Encounters with Anil Nerode, Logical Foundations of Computer Science, San Diego, January 2013.
Effectively Categorical Torsion Free Abelian Groups, Joint Meetings, San Diego,
January 2013.
Effectivity in Abelian Group Theory, Kobe University, April 2013.
What have I been thinking about (Parameterized complexity and Heuristics),
plenary Shonan, May 2013.
Randomness from Borel, though Turing and into the 21st Century,
plenary lecture, Randomness Workshop, University of Tokyo, May, 2013
Integer Valued Randomness,
plenary lecture, Randomness Workshop, University of Tokyo, May, 2013
Recent Advances in Multivariant Algorithmics,
Colloquium Lecture, Auckland University, May, 2013
More on integer valued randomness, National University of Singapore,
September 2013.
Computable Euclidean functions and computable Euclidean domains,
Nanyang University of Technology, September 2013
Effectivity in Abelian Group Theory, Asian Logic Conference, Guanzhou,
September 2013
Alan Turing, the Birth of Computation, the Power of Mathematics
(Public Lecture), Masterton, November 2013.
Effectivity in Abelian Group Theory,
Urbana, April 2014.
Integer Valued Randomness,
Midwest Computability Conference, University of Chicago, April 2014.
Effectivity in Abelian Group Theory,
Notre Dame, May 2014.
Courcelle's Theorem for Triangulations
Maui, July 2014.
Alan Turing, Computing, Bletchley, and Mathematics, Wellington Public Lecture,
February, 2015.
Here
is the video of the talk.
Courcelle's Theorem for Triangulations
(Short version), TAMC, Singapore, May 2015.
Courcelle's Theorem for Triangulations
(Shorter version), Computability, Probability and Logic. June 9, 2015,
Nijmegen
Computability in Mathematics-Turing's Legacy, MATCH Kolloquium
Lecture, Universit of Heidelberg, June, 2015
Alan Turing, Computing, Bletchley, and Mathematics, Singapore Public
Library (IMS Public Lecture), Singapore, July, 2015.
Codebreaking at Bletchley, Masters Tea, College of Alice and Peter Tan,
Singapore, September, 2015.
The Life of pi, Masters Tea, College of Alice and Peter Tan,
Singapore, April, 2016.
Multivariable Algorithmics, Tsingua University and
Chinese Academy of Sciences, Beijing April, 2016
A minimal degree computable from a weakly 2-generic one.
Montpellier, June 2016.
Using logic for algorithms, Montpellier, June 2016
The computational power of sets of random strings.
Luminy, June 2016.
Graph Colouring as Mathematical Miniature, Masters Tea, College of Alice and Peter Tan,
Singapore, February, 2017.
Some Applications of Computability to Mathematics, Darmstadt, June, 2017.
Some Applications of Computability to Mathematics, Paul Schupp's 80th, Groups and Computation, Stevens Institute of Technology, June, 2017.
Algorithmic Randomness, Kolloquium Lecture, University of Darmstadt, June 2018.
Algorithmic Randomness, Goedel Lecture, Logic Colloquium '18, June 2018.
Post's Programme Revisited, CCR '18, Santiago Chile, December 2018.
Logic and Invariants, Invited Lecture,
Modern Analysis and Geometry 2019 (Gaven Martin's 60th), Massey Albany January 2019.