The rigorous and comprehensive verification of communication-based software is an important engineering challenge in distributed systems. Drawn from our industrial collaborations [33,28] on Scribble, a choreography description language based on multiparty session types, this paper proposes a dynamic verification framework for structured interruptible conversation programming. We first present o...

Computer systems often provide hardware support for isolation mechanisms such as privilege levels, virtual memory, or enclaved execution. Over the past years, several successful software-based side-channel attacks have been developed that break, at least significantly weaken, these offer. Extending a processor with new architectural micro-architectural features brings risk of introducing attack...

Contract scheduling is a general technique that allows to design system with interruptible capabilities, given an algorithm not necessarily interruptible. Previous work on this topic has largely assumed the interruption worst-case deadline unknown scheduler. In work, we study setting in which there potentially erroneous prediction concerning interruption. Specifically, consider describes time o...

ions like timeout are certainly difficult to get right, but fortunately they only have to be written once. We find that in practice dealing with asynchronous exceptions is fairly straightforward, following a few simple rules: • Use bracket when acquiring resources that need to be released again. • Rather than takeMVar and putMVar, use modifyMVar_ (and friends) which have built-in asynchronous e...

The main goal of this paper is to present a new day-ahead energy acquisition model for a distribution company (Disco) in a competitive electricity market environment with Interruptible Load (IL). The work formulates the Disco energy acquisition model as a bi-level optimization problem with some of real issues, and then studies and designs a Genetic Algorithm (GA) of this optimization problem to...

UML 2.0 activity diagrams (ADs) are largely used as a modeling language for flow-oriented behaviors in software and business processes. Unfortunately, their place/transition operational semantics is unable to capture and preserve semantics of the newly defined high-level activities constructs such as Interruptible Activity Region. Particularly, basic Petri nets do not preserve the non-locality ...

A contract algorithm is an algorithm which is given, as part of the input, a specified amount of allowable computation time. The algorithm must then compute a solution within the alloted time. An interruptible algorithm, in contrast, can be interrupted at an arbitrary point in time and must produce a solution. It is known that contract algorithms can simulate interruptible algorithms using iter...

We consider the distribution of the intermediate filaments (IFs) in the retinal cells of the Pied flycatcher (Ficedula hypoleuca, Passeriformes, Aves) in the foveolar zone, which has the most specialized morphology, where the passerines have neither the rods nor the second-order neurons that service these rods, with only the single and double cones acting as photoreceptors. We report that singl...