Results 11 to 20 of about 17,205 (156)

Deep Brain Stimulation Reduces Conflict‐Related Theta and Error‐Related Negativity in Patients With Obsessive–Compulsive Disorder

open access: yesNeuromodulation: Technology at the Neural Interface, EarlyView., 2021
Abstract Objectives Obsessive–compulsive disorder (OCD) is a psychiatric disorder with alterations of cortico‐striato‐thalamo‐cortical loops and impaired performance monitoring. Electrophysiological markers such as conflict‐related medial frontal theta (MFT) and error‐related negativity (ERN) may be altered by clinically effective deep brain ...
Elena Sildatke   +9 more
wiley   +1 more source

An Energy Focusing Flexible and Lightweight Acoustic Metamaterial for Enhanced Ultrasound Power Transfer. [PDF]

open access: yesAdv Mater
A flexible and lightweight acoustic metamaterial composed of air cavities encased in polydimethylsiloxane (PDMS) is introduced to enhance ultrasound power transfer. The metamaterial leverages the strong reflectivity of air cavity boundaries to concentrate incoming ultrasound, thereby improving the performance of piezoelectric energy harvesters ...
Kwon HS, Yu Z, Li X, Dede EM, Lee T.
europepmc   +2 more sources

Bridging the Mid-Infrared-to-Telecom Gap with Silicon Nanophotonic Spectral Translation [PDF]

open access: yes, 2012
Expanding far beyond traditional applications in optical interconnects at telecommunications wavelengths, the silicon nanophotonic integrated circuit platform has recently proven its merits for working with mid-infrared (mid-IR) optical signals in the 2 ...
A Spott   +31 more
core   +3 more sources

Towards On-Chip Self-Referenced Frequency-Comb Sources Based on Semiconductor Mode-Locked Lasers. [PDF]

open access: yes, 2019
Miniaturization of frequency-comb sources could open a host of potential applications in spectroscopy, biomedical monitoring, astronomy, microwave signal generation, and distribution of precise time or frequency across networks.
Bustos-Ramirez, Ricardo   +6 more
core   +2 more sources

An Integrated-Photonics Optical-Frequency Synthesizer

open access: yes, 2017
Integrated-photonics microchips now enable a range of advanced functionalities for high-coherence applications such as data transmission, highly optimized physical sensors, and harnessing quantum states, but with cost, efficiency, and portability much ...
A Bluestone   +65 more
core   +1 more source

Optimization of photomixers and antennas for continuous-wave terahertz emission [PDF]

open access: yes, 2005
We have studied terahertz emission from interdigitated finger photomixers coupled to planar antenna structures. Using both pulsed and continuous-wave excitation, polarization measurements reveal that the antenna design dominates the properties of the
Baker, C.   +7 more
core   +1 more source

GUI for Analysis of Parameters, Accurate Design and Optimization of Microstrip Filters

open access: yesApplied System Innovation
Microstrip filters are widely used in electronics and communications. Designing these filters requires knowledge in communications, microwave engineering, and radiofrequency systems.
Luis Arturo García-Delgado   +7 more
doaj   +1 more source

Teaching the concept of convolution and correlation using Fourier transform

open access: yes, 2018
Convolution operation is indispensable in studying analog optical and digital signal processing. Equally important is the correlation operation. The time domain community often teaches convolution and correlation only with one dimensional time signals ...
Goodman, Smith
core   +1 more source

The modeling of diffuse boundaries in the 2-D digital waveguide mesh [PDF]

open access: yes, 2008
The digital waveguide mesh can be used to simulate the propagation of sound waves in an acoustic system. The accurate simulation of the acoustic characteristics of boundaries within such a system is an important part of the model.
Murphy, Damian T., Shelley, Simon
core   +1 more source

Offset frequency dynamics and phase noise properties of a self-referenced 10 GHz Ti:sapphire frequency comb

open access: yes, 2011
This paper shows the experimental details of the stabilization scheme that allows full control of the repetition rate and the carrier-envelope offset frequency of a 10 GHz frequency comb based on a femtosecond Ti:sapphire laser.
Bartels, Albrecht   +2 more
core   +1 more source

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