Exploiting Unique Fixed Points -- Scrap Your Type Applications -- Programming with Effects in Coq -- Verifying a Semantic ??-Conversion Test for Martin-Löf Type Theory -- The Capacity-C Torch Problem -- Recounting the Rationals: Twice! -- Zippy Tabulations of Recursive Functions -- Unfolding Abstract Datatypes -- Circulations, Fuzzy Relations and Semirings -- Asynchronous Exceptions as an Effect -- The Böhm–Jacopini Theorem Is False, Propositionally -- The Expression Lemma -- Nested Datatypes with Generalized Mendler Iteration: Map Fusion and the Example of the Representation of Untyped Lambda Calculus with Explicit Flattening -- Probabilistic Choice in Refinement Algebra -- Algebra of Programming Using Dependent Types -- Safe Modification of Pointer Programs in Refinement Calculus -- A Hoare Logic for Call-by-Value Functional Programs -- Synthesis of Optimal Control Policies for Some Infinite-State Transition Systems -- Modal Semirings Revisited -- Asymptotic Improvement of Computations over Free Monads -- Symmetric and Synchronous Communication in Peer-to-Peer Networks.