This paper argues that Haigh and Young’s definition of noninterference for intransitive security policies admits information flows that are not in accordance with the intuitions it seeks to formalise. Several alternative definitions are discussed, which are shown to be equivalent to the classical definition of noninterference with respect to transitive policies. Rushby’s unwinding conditions fo...

The problem of designing an integrated control and diagnostic module is considered. The four degree of freedom controller is recast into a general framework wherein results from optimal and robust control theory can be easily implemented. For the case of an 'If2 objective, it is shown that the optimal control-diagnostic module involves constructing an optimal controller, closing the loop with t...

Tiling is a technique used for exploiting medium-grain parallelism in nested loops. It relies on a rst step that detects sets of permutable nested loops. All algorithms developed so far consider the statements of the loop body as a single block, in other words, they are not able to take advantage of the structure of dependences between diierent statements. In this paper, we overcome this limita...

this paper introduces a technique for controlling a class of uncertain chaotic systems using an adaptive fuzzy proportional-integrator-derivative (pid) controller with h∞ tracking performance. the purpose of this work is to achieve optimal tracking performance of the controller using backtracking search algorithm (bsa). bsa, which is a novel heuristic algorithm, has an easy structure with singl...

In general, the objective of distillation control is to maintain the desired products quality. In this paper, the performances of different one point control strategies for an aromatic distillation column have been compared through dynamic simulation. These methods are: a) Composition control using measured composition directly. This method sufferes from large sampling delay of measuring de...

This paper presents a sequential loop closure approach to designing a velocity and altitude tracking autopilot for a hypersonic vehicle. The control architecture consists of two decoupled control subsystems, one for velocity, the other for altitude. The velocity control subsystem consists of an adaptive augmented baseline controller. The altitude control subsystem consists of an adaptive inner-...

background: familial adenomatous polyposis (fap) is a well-known entity for specialistrnand it has near 100% chance of malignant changes if does not managed surgically. in orderrnto reduce the disadvantages of laparatomy and diverting ileostomy we present ourrnresults of laparoscopic total proctocolectomy without diverting ileostomy.rnobjectives: the aim of this study was to present the results...