Results 91 to 100 of about 8,275,469 (344)

Multi-Label ECG Signal Classification Based on Ensemble Classifier

open access: yesIEEE Access, 2020
Electrocardiogram (ECG) has been proved to be the most common and effective approach to investigate the cardiovascular disease because that it is simple, non-invasive and low cost.
Zhanquan Sun   +3 more
doaj   +1 more source

Biomimetic apposition compound eye fabricated using microfluidic-assisted 3D printing

open access: yesNature Communications, 2021
Insect-like biomimetic compound eyes have many technological applications. Here, the authors present a facile fabrication scheme involving microfluidics assisted 3D printing that permits to completely separate design, optimization and construction of ...
Bo Dai   +12 more
doaj   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

open access: yesFEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge   +6 more
wiley   +1 more source

Evaluation of the Scintillation Loss for Optical Communication Systems with Direct Detection [PDF]

open access: yes, 2006
In optical communications through the atmosphere, the evaluation of a link feasibility often requires the quantification of the scintillation penalty in terms of power loss. To find how much additional optical power is needed to reach the bit-error-rate (
Perlot, Nicolas
core  

Development of optical components for METIS instrument

open access: yes, 2014
The ESA mission Solar Orbiter (SOLO) is dedicated to the study of Solar Atmosphere and Heliosphere. As a part of the payload, the instrument METIS (Multi Element Telescope for Imaging and Spectroscopy) will provide images of the corona, both in the ...
S. Fineschi   +8 more
core   +1 more source

Packet-Layer Forward Error Correction Coding for Fading Mitigation [PDF]

open access: yes, 2006
In an on/off-keying atmospheric optical communication system, index of refraction turbulence and PAT (pointing, acquisition and tracking) instabilities create strong and very slow fading compared to the usually used high data-rates.
Hennes Henniger, Henniger, Hennes
core   +1 more source

Nanoscale Noncoplanar Beam Splitters With Tunable Split Ratio

open access: yesIEEE Photonics Journal, 2020
Beam splitters, especially those with tunable split ratios, play significant role in interferometers, spectrometers, and communication systems. To this end, we proposed a polarization-controllable beam splitter based on dielectric metasurface composed of
Shengnan Tian   +3 more
doaj   +1 more source

L‐aspartate oxidase provides new insights into fumarate reduction in anaerobic darkness in Synechocystis sp. PCC6803

open access: yesFEBS Letters, EarlyView.
Synechocystis strains deficient in succinate dehydrogenase (SDH) secrete more succinate than the WT under dark anaerobic conditions, supporting that SDH then primarily acts as SDH, not as a fumarate reductase. L‐aspartate oxidase (Laspo) from Synechocystis is functional under anaerobic conditions, reducing fumarate to succinate.
Kateryna Kukil   +3 more
wiley   +1 more source

Optical interconnection networks based on microring resonators [PDF]

open access: yes, 2012
Optical microring resonators can be integrated on a chip to perform switching operations directly in the optical domain. Thus they become a building block to create switching elements in on-chip optical interconnection networks, which promise to overcome
Cuda, Davide   +6 more
core   +1 more source

Parameter determination and transformation for the focusing of dielectric microspheres illuminated by optical needle

open access: yesScientific Reports, 2017
By eliminating the spherical aberrations of microsphere we derived a simple but useful formula on the focusing of dielectric microsphere. On basis of this formula, not only can researchers determine the parameters of an optical microsphere system with ...
Tongnan Xia   +3 more
doaj   +1 more source

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