An overview of the PVS system is presented from a user interface perspective. We present the interfaces from the PVS Lisp core to Emacs, Tcl/Tk, the Prover, markup languages, and some of the various back-end and front-end systems that have been integrated with PVS.

Purpose. The Pediatric Vision Scanner (PVS) detects strabismus by identifying ocular fixation in both eyes simultaneously. This study was undertaken to assess the ability of the PVS to identify patients with amblyopia or strabismus, particularly anisometropic amblyopia with no measurable strabismus. Methods. The PVS test, administered from 40 cm and requiring 2.5 seconds of attention, generated...

This paper introduces a set of PVS theories for modelling and analysis of usability and safety aspects of user interface software design. Our PVS theories crystallise general usability issues commonly addressed in user‐centred safety requirements, such as the ability to undo user actions, the visibility of operational modes, and the predictability of user interface behaviour. These requirements...

Colloidal quantum dots (CQDs) have attracted attention as a next-generation of photovoltaics (PVs) capable of a tunable band gap and low-cost solution process. Understanding and controlling the surface of CQDs lead to the significant development in the performance of CQD PVs. Here we review recent progress in the realization of low-cost, efficient lead chalcogenide CQD PVs based on the surface ...

This paper reports the results of a case study on the feasibility of developing and applying mechanical methods, based on the proof system PVS, to prove propositions about real-time systems speci ed in the LynchVaandrager timed automata model. In using automated provers to prove propositions about systems described by a speci c mathematical model, both the proofs and the proof process can be si...

BACKGROUND Pulmonary vein stenosis (PVST) can occur after first-generation cryoballoon ablation. This study aimed to evaluate the incidence, severity, and characteristics of PVST after second-generation cryoballoon ablation. METHODS In total, 103 patients underwent PV isolation of paroxysmal atrial fibrillation using second-generation cryoballoons with a single big-balloon 3-minute freeze tec...

BACKGROUND Excessive protocol violations (PV), which can be defined as preventable mistakes in study conduct, may result in patient harm and introduce errors into a clinical trial's results leading to flawed trial conclusions.The purpose of this project was to gain a better understanding of reported PVs, to describe current practice with regards to the use of methods for the reduction of PVs an...

In previous work, the veriication system PVS has been used to support an assertional method for the speciication and veriication of distributed real-time systems. Essential part of the method is a com-positional rule for parallel composition. In this paper we focus on the formalization of parallel composition in PVS. Two, equivalent, versions of the semantics of parallel composition are formula...

∗ This work was supported by ONR Grant N00014-01-1-0765 (Building Interactive Digital Libraries of Formal Algorithmic Knowledge) and by NSF Grant CCR 0204193 (Proof Automation in Constructive Type Theory). Abstract. We describe a link between the Nuprl and PVS proof systems that enables users to access PVS from the Nuprl theorem proving environment, to import PVS theories into the Nuprl library...