Abstract. This paper is devoted to the analysis of a numerical scheme for the coagulation and fragmentation equation with diffusion in space. A finite volume scheme is developed, based on a conservative formulation of the space nonhomogeneous coagulation-fragmentation model, it is shown that the scheme preserves positivity, total volume and global steady states. Finally, several numerical simul...

Unnecessarily conservative behavior of standard process control techniques can be avoided by stochastic programming models when the distribution of random distur­ bances is known. In an earlier study we have investigated such an approach for tank level constraints of a distillation process. Here we address techniques that have accelerated the numerical solution of the large and expensive stocha...

An apparent paradox in classical statistical physics is the mechanism by which conservative. time-reversible microscopic dynamics, can pive rise to seemi,ngly dissipative behavior. In this paper we use system theoretic mols to show that dissipation can arise as an anifact of incomplete observations over a finite horizon. In addition, this approach allows us to obtain finile-time. low order, app...

This paper presents a systematic approach to designing a coupled oscillator controller, a control mechanism used successfully in nature. With this approach, a less conservative behavior-based robot controller with guaranteed performance can be automatically developed. This makes it possible to design a controller with good performance automatically, without the tuning of parameters. More import...

The nervous system is evolutionarily conservative compared to the peripheral appendages that it controls. However, species-specific behaviors may have arisen from very small changes in neuronal circuits. In particular, changes in neuromodulatory systems may allow multifunctional circuits to produce different sets of behaviors in closely related species. Recently, it was demonstrated that even s...

An osteolytic tumour of the mandible with prominent expansive growth on the alveolar ridge and displacement of the involved teeth is described in a 28-year-old man. The lesion was diagnosed as a central odontogenic fibroma, an uncommon benign neoplasm derived from dental apparatus, and was removed by curettage. The patient remains asymptomatic after thirteen years of follow-up, which supports t...

In this paper, we examine the cycle time and on-time delivery performance of a semiconductor wafer fabrication facility (wafer fab) under critical ratio (CR) dispatch regime. It turns out that determining appropriate due dates for this rule is a critical task. We provide a detailed analysis of the wafer fab behavior for a large range of due date values. From the results of the experiments we de...

Abstract A new type of supersymmetric transformations of the coupled-channel radial Schrödinger equation is introduced, which do not conserve the vanishing behavior of solutions at the origin. Contrary to usual transformations, these “non-conservative” transformations allow, in the presence of thresholds, the construction of potentials with coupled scattering matrices from uncoupled potentials....

We study, through molecular dynamics, a conservative two-dimensional Lennard-Jones-like gas (with attractive potential ∝ r−α). We consider the effect of the range index α of interactions, number of particles, total energy and particle density. We detect anomalies in the behavior of such systems when the interactions become long-ranged (0 ≤ α/d < 1), particularly negative specific heat and non-M...

Dynamical behavior of a class of Cohen-Grossberg models with multiple time-varying delays is studied in detail. Sufficient delay-dependent criteria to ensure local and global asymptotic stabilities of the equilibrium of this network are derived by constructing suitable Lyapunov functionals. The obtained conditions are shown to be less conservative and restrictive than those reported in the know...