We demonstrate the feasibility of using the XSB tabled logic programming system as a programmable xed-point engine for implementing eecient local model checkers. In particular, we present XMC, an XSB-based local model checker for a CCS-like value-passing language and the alternation-free fragment of the modal mu-calculus. XMC is written in under 200 lines of XSB code, which constitute a declara...

The first part of this paper presents the basic analyses carried out on Nigerian 330 kV electrical network with distributed generation (DG) penetration. The analyses include load flow, short circuit, transient stability, modal/eigenvalues calculation and harmonics. The proposed network is an expanded network of the present network incorporating wind, solar and small-hydro sources. The choice of...

In the context of musical acoustics, physical models of musical instruments have to be more and more sophisticated. For string models, realism is obtained by taking into account tension, flexion, shear, rotation and coupling phenomena but also nonlinear effects due to large displacements. The sound synthesis modal method is extended to the nonlinear case using Volterra series. The inverse probl...

We present a probabilistic multi-modal system for a robot to detect and approach the most promising interaction partner in a crowd of uninstrumented people outdoors. To achieve robust operation, the system integrates three multimodal percepts of humans and regulates robot’ behaviour to approach the location with highest probability of an engaged human. A series of real-world experiments demonst...

As Part III of this series, this paper focuses on an above-threshold modal analysis which includes gain saturation effects in the surface-emitting chirped circular grating lasers. We derive an exact energy relation which states that, in steady state, the net power generated in the gain medium is equal to the sum of peripheral leakage power and vertical emission power. This relation is particula...

The paper focuses on extending to the first order case the semantical program for modalities first introduced by Dana Scott and Richard Montague. We focus on the study of neighborhood frames with constant domains and we offer a series of new completeness results for salient classical systems of first order modal logic. Among other results we show that it is possible to prove strong completeness...

We present an algorithm for computing directly the denotation of a modal μcalculus formula χ over the configuration graph of a pushdown system. Our method gives the first extension of the saturation technique to the full modal μ-calculus. Finite word automata are used to represent sets of pushdown configurations. Starting from an initial automaton, we perform a series of automaton manipulations...

This paper assesses branching spacetime theories in light of metaphysical considerations concerning time. I present the A, B, and C series in terms of the temporal structure they impose on sets of events, and raise problems for two elements of extant branching spacetime theories—McCall’s ‘branch attrition’, and the ‘no backward branching’ feature of Belnap’s ‘branching space-time’—in terms of t...

In this paper we develop the metatheory for Timed Modal Logic (TML), which is the modal logic used for the analysis of timed transition systems (TTSs). We solve a series of long-standing open problems related to TML. Firstly, we prove that TML enjoys the Hennessy-Milner property and solve one of the open questions in the field. Secondly, we prove that the set of validities are not recursively e...