Hybrid system modeling refers to the construction of system models combining both continuous and discrete dynamics. These models can greatly reduce the complexity of a physical system model by abstracting some of the continuous dynamics of the system into discrete dynamics. Hybrid system models are also useful for describing the interaction between physical processes and computational processes...

The byssus is the set of proteinaceous threads widely used by bivalves to attach themselves to the substrate. Previous researchers have focused on a single byssate family, the Mytilidae. However, the properties of byssal threads from species outside this family are of interest - first, because evolutionary patterns are only detectable if species from a range of taxa are examined, and second, be...

Applications that use the Solaris threads application programming interface (API), e.g. thr_create(), mutex_lock(), cond_signal(), etc. [1], are generally non-portable. Thus to port an application that uses Solaris threads to another platform will require some degree of work. Solaris now supports the POSIX threads API as well as the Solaris threads API. Therefore to make a Solaris threaded appl...

In programming there is sometimes a need to make computation interruptible by external events. This paper argues that a dedicated language mechanism solves this need better than a pure library convention. The main issue in designing such a mechanism is specifying points of computation where it’s safe to interrupt a thread in order to execute a signal handler. The paper proposes rules for identi...

Centromeres nucleate the formation of kinetochores and are vital for chromosome segregation during mitosis. The SNF2 family helicase PICH (Plk1-interacting checkpoint helicase) and the BLM (the Bloom's syndrome protein) helicase decorate ultrafine histone-negative DNA threads that link the segregating sister centromeres during anaphase. The functions of PICH and BLM at these threads are not und...

Goal of this paper is the efficient and portable implementation of the Nanothreads Programming Model (NPM), a dependence-driven two-level threads model for shared-memory multiprocessors, on top of the POSIX Threads API. Our general approach is to combine portability with efficiency by implementing the machine dependent components of the runtime system based on POSIX threads and defining an appr...