Highly concurrent and reliable data objects are vital for parallel programming. Lock-free shared data objects are highly concurrent and guarantee that at least one operation, from a set of concurrently executed operations, finishes after a finite number of steps regardless of the state of the other operations. Lock-free data objects provide progress guarantees on the object level. In this paper...

patients with end stage renal disease need a good vascular access for hemodialysis. arteriovenous fistula is the method of choice for vascular access in these patients. however, failure of arteriovenous fistula due to thrombosis is a major problem. the aim of this study was to evaluate the effect of the heparin on the patency of the arteriovenous fistula. this prospective interventional case co...

The paper studies the impact of several lock manager designs on the overhead imposed to a persistent programming language by automated object locking. Our study reveals that a lock management method based on lock state sharing outperforms more traditional lock management designs. Lock state sharing is a novel lock management method that represents all lock data structures with equal values with...

From a project on upgrading an existing commercially used operating system for support of a distributed system architecture, we present results and experience from a comprehensive analytical performance evaluation of a large number of different implementation strategies for distributed lock management. The various lock management policies we consider differ in the management of the lock databas...