This article reports on assessment results for several approaches to the rami cation problem Two types of assessments are re ported Assessment of soundness for one minimization based and one causation based method Relative range assessments for a number of minimization based methods Assessment of soundness is based on an underlying semantics for rami cation We propose de ne and use a causal pro...

We present a neural mass model of intermittent transitions into electroencephalographic (EEG) seizure rhythms in epilepsy. The route to intermittent dynamics is identified as Type 1 and state transition statistics are explored. It is demonstrated that a single framework can give rise to different distributions for seizure and non-seizure lengths in line with variability observed clinically. Fur...

Ab initio calculations predict a metal-insulator transition at zero temperature to occur in La4Ni3O8 at moderate pressures as a result of a pressure-induced spin-state transition. The spin-state transition that is seen at 105 K at ambient pressure, from a low-temperature high-spin state to a high-temperature low-spin state, has been observed to be shifted to lower temperatures as pressure is ap...

An environment to support the modeling, analysis, simulation, and development of state transition models, SMOOCHES (State Machines for Object-Oriented Concurrent Hierarchical Engineering Specifications), is presented. SMOOCHES allows the hierarchical construction, analysis, and simulation of state transition models in an object-oriented distributed environment. Statecharts (see Harel, 1987c), a...

The existence of functional dependency among the state variables of a state transition system was identified as a common cause of inefficient BDD representation in formal verification. Eliminating such dependency from the system compacts the state space and may significantly reduce the verification cost. Despite the importance, how to detect functional dependency without or before knowing the r...

Model Checking is an automated technique for the systematic exploration ofu the state space of a state transition system. The first part of the tutorial provides an introduction to the basic concepts of model checking, including BDDand SAT-based symbolic model checking, partial order reduction, abstraction, and compositional verification. Model Checking has been applied sucessfully to hardware ...

The problem of counteracting the effects of adversarial inputs on the operation of an asynchronous sequential machine is considered. The objective is to build an automatic state-feedback controller that returns an asynchronous sequential machine to its original state, after the machine has undergone a state transition caused by an adversarial input. It is shown that the existence of such a cont...

The linear reachability problem is to decide whether there is an execution path in a given finite state transition system such that the counts of labels on the path satisfy a given linear constraint. Using results on minimal solutions (in nonnegative integers) for linear Diophantine systems, we obtain new complexity results for the problem, as well as for other linear counting problems of finit...

The major human errors that have proven to be key factors in 80 to 90% of all traffic accidents include “distraction,” taking one’s eyes off the road while driving; “inattentiveness,” switching one’s consciousness from driving to other things; and “false perception” causing recognition mistakes in traffic due to visual illusions. To study human errors causing traffic accidents we evaluated evas...

We illustrate the di±culties raised by four features of realistic transition models in labour economics: dimensionality, institutional constraints, persistence and sample attrition. We estimate a multi-spell multi-state transition model using longitudinal data on the 1988 cohort of male school-leavers in North-West England. The model predicts transitions between college, the government Youth Tr...