The van Rossum metric measures the distance between two spike trains. Measuring a single van Rossum distance between one pair of spike trains is not a computationally expensive task, however, many applications require a matrix of distances between all the spike trains in a set or the calculation of a multi-neuron distance between two populations of spike trains. Moreover, often these calculatio...

We consider the model problem of mixing passive tracers by an incompressible viscous fluid. Addressing questions optimal control in realistic geometric settings or alternatively design fluid-confining geometries that successfully effect requires a meaningful norm which to quantify is also suitable for easy and efficient computation (as needed, e.g., use gradient-based optimization methods). phy...

Abstract Analyses of quasi-periodic oscillations (QPOs) are important to understanding the dynamic behavior in many astrophysical objects during transient events like gamma-ray bursts, solar flares, magnetar and fast radio bursts. Astrophysicists often search for QPOs with frequency-domain methods such as (Lomb–Scargle) periodograms, which generally assume power-law models plus some excess arou...

The application of terrestrial water storage (TWS) data observed with GRACE and GRACE-FO often requires realistic uncertainties. For gridded TWS data, this the knowledge covariances, which can be derived from formal, i.e., formally estimated in parameter estimation, variance-covariance matrix provided together Stokes coefficients. However, propagation monthly matrices to is computationally expe...

Designing and developing new aerospace propulsion systems is time-consuming and expensive. Computational simulation is a promising means for alleviating this cost, but requires a flexible software simulation system capable of integrating advanced multidisciplinary and multifidelity analysis methods, dynamically constructing arbitrary simulation models, and distributing computationally complex t...

Abstract With increasing life expectancy, the risk of diseases central nervous system, such as cancer, strokes, etc., also increases. Strokes often result in injury to sciatic nerve, which is responsible for controlling calf muscles (plantar and dorsal flexors). A so-called ankle joint orthosis (AFO) helps support pathological gait avoid foot drop during gait. Passive orthoses are particular im...

To provide a tool for performance evaluation of IP-based delayand loss-sensitive applications running over wireless channels we propose a novel cross-layer wireless channel modeling approach. We firstly develop simple and computationally efficient wireless channel modeling algorithm. For this purpose we adopt the special solution of the inverse eigenvalue problem and show that its complexity si...

This article develops algorithms for the characterization and the visualization of microscale features by using a small number of sample points, and with a goal to mitigate for the measurement shortcomings which are often destructive or time consuming. The popular measurement techniques which are used in imaging micro-surfaces may include 3D stylus or interferometric profilometry and Scanning E...

Population-based search methods such as evolutionary algorithm, shuffled complex algorithm, simulated annealing and ant colony search are increasing used as automatic calibration methods for a wide range of water and environmental simulation models. However, despite the advances in computer power, it may still be impractical to rely exclusively on computationally expensive (time consuming) simu...

Security in email systems involves computationally expensive public key cryptography operations. This makes it difficult to deploy secure email systems for computationally weak environments, such as personal digital assistants. To solve this problem, we have developed a secure framework in which computationally weak clients can use a trusted server to perform difficult cryptographic operations ...