In this work, we propose an extension of notations based on the Higher-Order π-calculus with primitive operators, called screening operators, whose role is to protect internal interfaces by dynamically restricting the visibility of channels.
We show how restrictions on resource access control can be enforced dynamically in terms of screening operators, and contrast it with an alternative approach in which restrictions on the behaviour of processes are based on the notion of process type [17] and intended to be checked statically.
But the impulse to hit the off button may be a myth: the televisions stay on 85 percent of the time that cabs have passengers inside, according to data that the screens' operators have provided to the Taxi and Limousine Commission.
Messagenet is working to hide consumers' use of its services from the screening techniques operators use to identify and block Internet calling operators.
Similar to the arm supported system described earlier, the hand guided system consists of (1) a drilling unit, (2) a hard-wired unit for interpreting sensory signals and drill drive control, and (3) a PC screen for operator visual feedback.
They screen prospective operators for their loyalty, wholesome values and willingness to buy into Chick-fil-A's in-your-face Christian credo, espoused often by Cathy, an evangelical Southern Baptist who says "the Lord has never spoken to me, but I feel Chick-fil-A has been His gift".
(Similarly, I don't want an AT&T operator screening my phone calls. Even from my most idiosyncratic relatives. Hanging up on cranks is my job).
Indeed, in the absence of rigid quality assessment, the ultrasound part of the current screening remains strongly operator (and machine) dependent.
We explored opinions representing a service provider and policy perspective, namely eye-care providers, policy makers and health service commissioners, on the most feasible and acceptable components (target population, site, screening tests and operator) of glaucoma screening strategies.
Results from the first round questionnaire for each section of testing strategy, target population, screening site and operator were fed back to 31 (82%) of the 38 participants who completed round one and two participants who were unable to complete round one but could take part in round two (Additional file 2, feedback to participants).
It could be used to show on screen to an operator targets identified at a distance perhaps through their heat signatures or appearance.
