Electro hydraulic drives are often used where the dynamic response requirements of the driven load in terms of speed, cycling, accuracy and stability are particularly severe. One such application is the control and drive system associated with a high frequency hydraulic vibrator. A hydraulic shaker controls a valve which directs high pressure hydraulic fluid to generate controlled vibration. Hy...

In the present work, we perform experiments and molecular dynamics simulations to elucidate the underlying deformation mechanisms of single crystalline copper under the load-controlled multi-passes nanoscratching using a triangular pyramidal probe. The correlation of microscopic deformation behavior of the material with macroscopically-observed machining results is revealed. Moreover, the influ...

By consulting various worldwide definitions of microgrids and distributed energy, this study presents a microgrid-structured multi-agent system and uses Matlab/Simulink to construct a circuit with microgrid features, which enables the changes in each electrical source and load in the microgrid to be monitored and controlled. This multi-agent system adheres to the Java Agent Development Framewor...

The Internet Engineering Task Force (IETF) is considering the adoption of controlled-load service as a standard for relaxed real-time service on the Internet. The ability of relaxed real-time services to achieve high level of utilization and still provide acceptable quality of service depends crucially on the use of measurement-based admission control (MBAC) algorithms. MBAC algorithms admit ne...

A de-centralised load management technique exploiting the flexibility in the charging of Electric Vehicles (EVs) is presented. Two regimes are assumed. The Controlled Charging Regime (CCR) between 16:30 hours and 06:00 hours next day Uncontrolled (UCR) same day. During CCR, EVs is coordinated controlled by means a wireless two-way communication link between EV Smart Charge Controllers (EVS...

OBJECTIVE The aim of this study was to compare the effects of a high load lifting exercise with low load motor control exercises on pain intensity, disability and health-related quality of life for patients with mechanical low back pain. DESIGN A randomized controlled trial. SUBJECTS Patients with mechanical low back pain as their dominating pain mechanism. METHODS The intervention progra...

Rationale: In cardiac muscle, Ca -induced Ca release (CICR) from the sarcoplasmic reticulum (SR) is mediated by ryanodine receptor (RyR) Ca release channels. The inherent positive feedback of CICR is normally well-controlled. Understanding this control mechanism is a priority because its malfunction has life-threatening consequences. Objective: We show that CICR local control is governed by SR ...

Nanoindentation measurements frequently involve a hold period at the peak load to allow material reach stabilized state. A dwell time is also commonly employed sufficiently low after unloading, quantify thermal drift for correction of raw load-displacement data. This communication presents numerical case studies indentation loading on viscoelastic thin film using finite element method. We illus...

The implementation of a load balancing policy on a continuous basis in a delay-limited distributed computing environment may not only drain the computational resources of each computational element (CE), but can also lead to an unnecessary exchange of loads between the CEs. This degrades the system performance, measured by the overall completion time of the total tasks in the system. Thus, for ...

Simulations have been performed to verify the effectiveness of using link-by-link flow controlled virtual channels for maximizing ATM network performance. A simulator which accurately reflects the real hardware design of a flow controlled ATM switch is used. The switch is currently under joint development by BNR and Harvard. The simulation results clearly demonstrate that the flow control mecha...