Journal ArticleDOI
Feedback for physicists: A tutorial essay on control
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In this paper, a tutorial essay aims to give enough of the formal elements of control theory to satisfy the experimentalist designing or running a typical physics experiment and enough to satisfy a theorist wishing to understand its broader intellectual context.Abstract:
Feedback and control theory are important ideas that should form part of the education of a physicist but rarely do. This tutorial essay aims to give enough of the formal elements of control theory to satisfy the experimentalist designing or running a typical physics experiment and enough to satisfy the theorist wishing to understand its broader intellectual context. The level is generally simple, although more advanced methods are also introduced. Several types of applications are discussed, as the practical uses of feedback extend far beyond the simple regulation problems where it is most often employed. Sketches are then provided of some of the broader implications and applications of control theory, especially in biology, which are topics of active research.read more
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DissertationDOI
Dynamics of a sensory network of ON and OFF cells with global delayed feedback
TL;DR: The theoretical basis for input driven transitions to rhythmic states in delayed feedback networks with realistic neural populations is established, motivated by numerical and experimental results on the electrosensory system.
Two-Electrode Measurements Of Electrostatic Double Layer Potentials With Atomic Force Microscopy
Abstract: In this dissertation, I provide a thorough description of my development of theoretical, analytical, and experimental techniques pertaining to novel measurements of the electrostatic double layer (EDL) using atomic force microscopy (AFM), among other techniques. The EDL refers to the structure formed by ions that exists at the interface between a solid and a liquid. The EDL is an important physical element of many systems and its behavior has been of interest to scientists for many decades. Because many areas of science and engineering are moving to test, build, and understand systems at smaller and smaller scales, this work focuses on nanoscopic experimental investigations of the EDL. In that vein, AFM will be introduced and discussed as a tool for making high spatial resolution measurements of the solid-liquid interface, culminating in a description of the development of a method for completely characterizing the EDL using direct force measurements with AFM. I first explore, in a historical fashion, the development of the various models and theories that are used to describe the electrostatic double layer. Later, various experimental techniques and ideas are addressed as ways to make measurements of interesting characteristics of the EDL. Finally, I will introduce a newly developed approach to measuring the EDL system with AFM. Using this approach, AFM measurements were made of the diffuse double layer potentials using a two-electrode system consisting of a metal coated atomic force microscopy cantilever and a metal substrate. The variation in the diffuse layer potential was measured as a function of probesample potential difference, ∆V. From these measurements, values of the bulk solu-
Journal ArticleDOI
When geometry is irrelevant for heat diffusion: the transition from lumped-element to field formulations
Journal Article
Measurements Of Electrostatic Double Layer Potentials With Atomic Force Microscopy
TL;DR: In this article, the authors provide a thorough description of the development of theory and experiment pertaining to the electrostatic double layer (EDL) in aqueous electrolytic systems.
Journal ArticleDOI
NQontrol: An open-source platform for digital control-loops in quantum-optical experiments.
Christian Darsow-Fromm,Luis Dekant,Stephan Grebien,Maik Schröder,Roman Schnabel,Sebastian Steinlechner +5 more
TL;DR: NQontrol as discussed by the authors is a solution based on the ADwin digital control platform that delivers eight simultaneous locking loops running with 200 kHz sampling frequency, and offers five second-order filtering sections per channel for optimal control performance.
References
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Elements of information theory
Thomas M. Cover,Joy A. Thomas +1 more
TL;DR: The author examines the role of entropy, inequality, and randomness in the design of codes and the construction of codes in the rapidly changing environment.
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System Identification: Theory for the User
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Statistical mechanics of complex networks
TL;DR: In this paper, a simple model based on the power-law degree distribution of real networks was proposed, which was able to reproduce the power law degree distribution in real networks and to capture the evolution of networks, not just their static topology.
Journal ArticleDOI
The Structure and Function of Complex Networks
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