Results 71 to 80 of about 9,748,667 (257)

Numerical modeling of InGaAs/AlGaAs heterostructure for short-wave infrared nBn photodetectors

Journal of the European Optical Society-Rapid Publications
nBn infrared photodetectors have emerged as a strong alternative to conventional pn and pin-based structures due to their low dark current, fast response, and suppression of Shockley–Read–Hall (SRH) generation pathways. In this study, an InP-based InGaAs/
Tok Çağrı, Satılmış Mert, Keleş Habibe, Oğuz Fikri, Sarı Hüseyin, Özbay Ekmel   +5 more
doaj   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

FEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Life-cycle costs and infrastructural investments induced by unconventional low-noise aircraft

, 2015
The environment challenge and the expected growth of the market demand impose a technology breakthrough within the aeronautical industry. Although several innovative configurations of airplanes have been analyzed, none of them has been yet chosen as the ...
CENTRACCHIO, FRANCESCO, IEMMA, Umberto, Vitagliano, Fabio Pisi   +2 more
core  

A light‐triggered Time‐Resolved X‐ray Solution Scattering (TR‐XSS) workflow with application to protein conformational dynamics

FEBS Open Bio, EarlyView.
Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei, Fredrik Orädd, Konstantinos Magkakis, Magnus Andersson   +3 more
wiley   +1 more source

Low-Frequency Noise Characteristics of AlGaAs/InGaAs Pseudomorphic HEMTs [PDF]

, 2001
The low-frequency noise of InGaAs pseudomorphic HEMTs fabricated on GaAs substrate was studied. The dependence of the noise spectral density on the gate voltage indicates that the channel of the device dominates the low-frequency noise.
MIZUTANI, Takashi, KISHIMOTO, Shigeru, YAMAMOTO, Makoto, MAEZAWA, Koichi   +3 more
core  

Asymptotic stochastic characterization of phase and amplitude noise in free-running oscillators [PDF]

, 2011
Starting from the definition of the stochastic differential equation for amplitude and phase fluctuations of an oscillator described by an ordinary differential equation, we study the associated Fokker–Planck equation by using tools from stochastic ...
Bonani, Fabrizio, FABRIZIO BONANI, Traversa, Fabio Lorenzo, FABIO L. TRAVERSA   +3 more
core   +1 more source

Single‐molecule DNA flow‐stretch assays for high‐throughput DNA–protein interaction studies

FEBS Open Bio, EarlyView.
We describe an optimised single‐molecule DNA flow‐stretch assay that visualises DNA–protein interactions in real time. Linear DNA fragments are tethered to a surface and stretched by buffer flow for fluorescence imaging. Using λ and φX174 DNA, this protocol enhances reproducibility and accessibility, providing a versatile approach for studying diverse ...
Ayush Kumar Ganguli, Mohammad Nour Alsamsam, Ugnė Bagdonaitė, Van Truc Vu, Chun‐Jen Huang, Polina Kuzhir, Mindaugas Zaremba, Aurimas Kopūstas, Marijonas Tutkus   +8 more
wiley   +1 more source

A multi-filter system for speech enhancement under low signal-to-noise ratios

, 2009
In this paper, the problem of deteriorating performance of speech recognition under very low signal-to-noise ratios (SNR) is considered. In particular, for a given pre-trained speech recognizer and for a finite set of speech commands, we show that ...
Nordholm, Sven, Yiu, K.F.C., Low, SY, Chan, KY, Nordholm, S., Low, S.Y., Nordholm, S, Chan, Kit Yan, Yiu, KFC, Chan, K., Yiu, Ka Fai, Low, Siow Yong, Chan, K.Y., Low, Siow   +13 more
core   +1 more source

Ultralow-Noise Chopper Amplifier for Seafloor E-Field Measurement

Sensors
The seafloor E-field signal is extremely weak and difficult to measured, even with a high signal-to-noise ratio. The preamplifier for electrodes is a key technology for ocean-bottom electromagnetic receivers.
Sixuan Song, Kai Chen
doaj   +1 more source

Analysing the significance of small conformational changes and low occupancy states in serial crystallographic data

FEBS Open Bio, EarlyView.
This protocol paper outlines methods to establish the success of a time‐resolved serial crystallographic experiment, by means of statistical analysis of timepoint data in reciprocal space and models in real space. We show how to amplify the signal from excited states to visualise structural changes in successful experiments.
Jake Hill, Yelyzaveta Pulnova, Elke De Zitter, Helen M. Ginn, Briony A. Yorke   +4 more
wiley   +1 more source