There is a well-established theory and practice for creating correct-by-construction functional programs by extracting them from constructive proofs of assertions of the form ∀x : A.∃y : B.R(x, y). There have been several efforts to extend this methodology to concurrent programs, say by using linear logic, but there is no practice and the results are limited. In this paper we define a logic of ...

Since the emergence of solid state devices into the storage scene, improvements in capacity and price have brought them to the point where they are becoming a viable alternative to traditional magnetic storage media. Current file systems and device-level I/O schedulers are optimized for rotational magnetic hard disk drives. In order to improve the efficiency of hard disk utilization, an Operati...

BACKGROUND Iron oxide (IO) nanoparticles (NPs) of sizes less than 50 nm are considered to be non-toxic, biodegradable and superparamagnetic. We have previously described the generation of IO NPs coated with Human Serum Albumin (HSA). HSA coating onto the IO NPs enables conjugation of the IO/HSA NPs to various biomolecules including proteins. Here we describe the preparation and characterization...

Control system design involves input/output (IO) selection, that is, decisions on the number, the place, and the type of actuators and sensors. The choice of inputs and outputs a!ects the performance, complexity, and costs of the control system. Due to the combinatorial nature of the selection problem, systematic methods are needed to complement one's intuition, experience, and physical insight...

PetaScale computing platforms need to be coupled with efficient IO subsystems that can deliver commensurate IO throughput to scientific applications. In order to gain insights into the deliverable IO efficiency on the Cray XT platform at ORNL, this paper presents an in-depth efficiency evaluation of its parallel IO software stack. Our evaluation covers the performance of a variety of parallel I...

The input-output (IO) model is a powerful economic tool with many extended applications. However, one of the widely criticized drawbacks its rather lengthy time lag in data preparation, making it impossible to apply IO high-resolution time-series analysis. conventional thus unfortunately unsuited for In this study, we present an innovative algorithm that integrates linear regression techniques ...

As the number of nodes in cluster systems continues to grow, leveraging scalable algorithms in all aspects of such systems becomes key to maintaining performance. While scalable algorithms have been applied successfully in some areas of parallel I/O, many operations are still performed in an uncoordinated manner. In this work we consider, in three file system scenarios, the possibilities for ap...