ABSTRACT The instrument of concurrency, whereby UK regulatory authorities share and often, in practice, lead the application competition policy, is an important feature law regime. Several studies examined its pros cons from a theoretical perspective. This first article to take different approach critically assesses Ofcom’s concurrent powers telecoms sector. review identifies number shortfalls ...

We find the algebraic laws for true concurrency. Eventually, we establish a whole axiomatization for true concurrency called APTC (Algebra for Parallelism in True Concurrency). The theory APTC has four modules: BATC (Basic Algebra for True Concurrency), APTC (Algebra for Parallelism in True Concurrency), recursion and abstraction. And also, we show the applications and extensions of APTC.

The concurrency control problem in database systems has been examined by many people and several concurrency control algorithms have been proposed. The most popular concurrency controls are two-phase locking and timestamp ordering. This paper reviews both algorithms and shows that they are special cases of a more general concurrency control algorithm. This concurrency control algorithm is descr...