We present a pedagogical discussion of the the Hirsch-Fye and Continuous time Quantum Monte Carlo (QMC) algorithms which may be used to study a correlated cluster embedded in an uncorrelated host, or used to solve the cluster problem in dynamical mean field theory (DMFT) or its cluster extensions. The basic algorithms are discussed, together with methods for efficient measurments and the modifi...

The recent discovery that silicon nitride membranes can be used as extremely high Q mechanical resonators makes possible a number of novel experiments, which include improved long range vacuum Casimir force measurements, and measurments of the properties of liquid helium below the lambda point. It is noted that in the thermal correction to the Casimir force, the phase velocity of the excitation...

This paper presents an active steering control strategy that improves the performance of rail vehicles on track curves. The control scheme is developed to explore the usually symmetrical arrangement of bogie suspensions such that only simple and practical sensors are needed. The vehicle configuration and requirements of wheelset steering on curves are explained, before the detailed control desi...

Virtual auditory space (VAS) refers to the synthesis and simulation of spatial hearing using earphones or a speaker system. High-fidelity VAS requires the use of individualized head-related transfer functions (HRTFs) which describe the acoutic filtering properties of the listener’s external auditory periphery. Because HRTFs are unique for each individual (“the auditory thumbprint”), a primary h...

The aim was to quantify tau protein and â-amyloid (Aâ42) in the CSF of patients with sporadic Creutzfeldt-Jakob disease (CJD), Alzheimer’s disease (AD), and controls. Double sandwich enzyme linked immunosorbent assays (ELISAs) were used for measurments. Tau was increased 58-fold in CJD and 3.5-fold in AD compared with controls, whereas Aâ42 was decreased 0.5-fold in both CJD and AD. A cut oV le...