Current systems use caching to provide high performance and possibly support disconnected operation. However, current solutions are type specific. With the advent of modular distributed operating systems and mobile machines there is a need to provide generic support for implementing cacheable/disconnectable services. We present an architecture that can be used to implement cacheable/disconnecta...

In the past, the gravitational acceleration on the surface of the Earth, g has been measured in many ways. Various methods include the use of a pendulum as well as models involving the use of a mass on a spring. We have designed a new method incorporating the mass-spring model with a capacitor, and a capacitance meter. This capacitor model still uses a hanging mass on a spring, but alters the m...

Mass-spring systems simulations rely on the numerical integration method used for solving the resulting ordinary differential equations. Implicit schemes, which solve such equations, are unconditionally stable and are thus widely used. Part of this stability is due to force filtering which is inherent to the implicit formulation and is referred to artificial damping. We extract this artificial ...

The leg function in human running can be characterized by spring-like behaviour. The human leg itself has several segments, which influence the leg function. In this paper a simple model based on springmass-running but with with a compliant ankle joint is introduced to investigate the influence of a rigid foot segment. The predicted forcelength-curve explains changes in leg stiffness as well as...

Mass Spring networks are commonly used to produce simu lations of deformable bodies for computer animation However such an approach can produce inaccurate results if too coarse a discretisation is employed and so many animators use excessively large and slow net works In order to remove the guesswork from such an approach this paper presents a mechanism for adaptively re ning portions of such s...

As spring-like leg behaviour in human running was observed in a number of studies [1] the spring loaded inverted pendulum (SLIP) model was initially proposed as a template model for running and hopping [2]. Based on the model behaviour a number of predictions were made concerning the ability to reproduce dynamics of walking gaits [3], stability measures and stabilisation strategies [4] as well ...

In this paper, we present a novel control strategy for running which is robust to disturbances, and makes excellent use of passive dynamics for energy economy. Our strategy combines two ideas: an existing flight phase policy, and a novel stance phase impulse control policy. The state-of-the-art flight phase policy commands a leg angle trajectory that results in a consistent horizontal center-of...

In surgical simulations, the two most popular approaches to model soft tissues are Finite Element Method (FEM) and Mass-Spring System (MSS). Main advantages of FEM are accuracy and realism. Furthermore, the model allows the direct integration of experimentally obtained biomechanical tissue parameters. However, computation times remain high, limiting real-time application of the method. In contr...

In the study of physical, mechanical, and electrical systems one often encounters differentialdifference equations and recurrence relations. The sources from which these equations arise may be quite different but their mathematical forms are very similar. For example, there is an analogy between mass-spring systems and electrical systems whereby point masses correspond to inductances and spring...