We show that a number of models in virus dynamics, epidemiology and plant biology can be presented as ``damped" versions the Lotka-Volterra predator-prey model, by analogy to damped harmonic oscillator. The deepens with use Lyapunov functions, which allow us characterize their dynamics even make some estimates.

Structural joints provide connection between structural element (beam, plate etc.) in order to construct a whole assembled structure. There are many types of structural joints such as bolted joint, riveted joints and welded joints. The joints structures significantly contribute to structural stiffness and dynamic behaviour of structures hence the main objectives of this paper are to review on m...

In this paper we aim to estimate the differential student knowledge model in a probabilistic domain within an intelligent tutoring system. The student answers to questions requiring diagnosing skills are used to estimate the actual student model. Updating and verification of the model are conducted based on the matching between the student's and model answers. Two different approaches to updati...

This paper describes a study of the effects of discretisation on model updating analysis. Minimising the discrepancy between FE model predictions and experimental modal test data is the primary objective of model updating. Numerical case studies presented in this paper show the influence on the final values of the updating parameters for an initial FE model with and without discretisation error...

Evidence is presented that the damped Lyα absorption systems are the high-redshift (z > 3) progenitors of galaxy disks. I discuss kinematic evidence that the damped Lyα systems are rotating disks. I also discuss implications of the lack of metal-poor damped Lyα systems with line width ∆v > 100 km s. I then present new evidence stemming from correlations between element-abundance ratios and [Fe/...

Simplifications and theoretical assumptions are usually incorporated into the numerical modeling of structures. However, these may reduce accuracy simulation results. This problem has led to development model-updating techniques minimize error between experimental response modeled structure by updating its parameters based on observed data. Structural models typically constructed using a determ...