Noise can have a significant impact on the response dynamics of a nonlinear system. For neurons, the primary source of noise comes from background synaptic input activity. If this is approximated as white noise, the amplitude of the modulation of the firing rate in response to an input current oscillating at frequency omega decreases as 1/square root[omega] and lags the input by 45 degrees in p...

Ann McKenna is an Associate Professor in the Department of Engineering in the College of Technology and Innovation at Arizona State University (ASU). Prior to joining ASU she served as a program officer at the National Science Foundation in the Division of Undergraduate Education and was on the faculty of the Segal Design Institute and Department of Mechanical Engineering at Northwestern Univer...

Dr Hazen received his B.S. and M.S. degrees in Interdepartmental Biology from Michigan State University. His Ph.D. is from Wake Forest University in Microbial Ecology. Currently, he is Governor’s Chair at the University of Tennessee and professor in the Departments of Civil and Environmental Engineering, Microbiology, and Earth and Planetary Sciences and a Faculty Fellow in the Biosciences Divi...

The quality of user interfaces is often measured in terms of efficiency, effectiveness, and satisfaction. In the area of tangible user interfaces, epistemic--or exploratory--action has been suggested as a fourth measure of quality. In computer game studies (Kirsh & Maglio, 1992, 1994), players used epistemic actions to modify the environment, which helped them determine the correct position of ...

Within the post-Soviet area, the Baltic states have been far ahead of any other former Soviet republic. Estonia, Latvia, and Lithuania have done amazingly well in terms of political, economic, and social transition. Yet, like many other new members of the European Union, the Baltic states still face varying degrees of challenges to this perpetual transition that every state faces. The author id...

We prove an analogue in Arakelov geometry of the Grothendieck-RiemannRoch theorem.

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INTRODUCTION Current tools and methods in architectural design do not allow predicting and evaluating how people will use designed environments before their actual realization. OBJECTIVE To investigate how computational simulation can help in evaluating design proposals as far as their use by people is concerned. METHODS Simulation of a medicine distribution procedure in a general hospital ...

The dynamics of quantum systems can be approximated by the time propagation of Gaussian wave packets. Applying a time dependent variational principle, the time evolution of the parameters of the coupled Gaussian wave packets can be calculated from a set of ordinary differential equations. Unfortunately, the set of equations is ill behaved in most practical applications, depending on the number ...