Results 41 to 50 of about 1,935,997 (301)

125 Gbit/s discretely tunable InP-on-silicon filtered feedback laser with sub-nanosecond wavelength switching times [PDF]

open access: yes, 2018
A heterogeneously integrated InP-on-silicon fast tunable filtered feedback laser is demonstrated. The laser device consists of a main Fabry-Pérot cavity connected to an integrated arrayed waveguide grating of which the outputs form external cavities in ...
  +3 more
core   +2 more sources

The influence of the material of ultrasonic vibration concentrator on the amount of mechanical vibrations’ amplitude

open access: yesИзвестия высших учебных заведений. Поволжский регион:Технические науки, 2023
Background. The purpose of this article is to find the optimal material for the concentrator of ultrasonic vibrations for subsequent use in the processes of electric arc surfacing. Materials and methods.
A.A. Kazinskiy, D.V. Babakaev
doaj   +1 more source

Use of Dynamical Undulator Mechanism to Produce Short Wavelength Radiation in Volume FEL (VFEL)

open access: yes, 2002
VFEL lasing in system with dynamical undulator is described. In this system radiation of long wavelength creates the undulator for lasing on shorter wavelength. Two diffraction gratings with different spatial periods form VFEL resonator. The grating with
Baryshevsky   +5 more
core   +1 more source

Optical Characterization of a New Facility for Materials Testing under Concentrated Wavelength-Filtered Solar Radiation Fluxes

open access: yesSolar, 2023
The materials used to manufacture solar receivers for tower power plants must withstand high fluxes of concentrated solar radiation (from 0.1 to even 1.5 MWm−2) and operate at high operating temperatures (>800 °C).
Noelia Estremera-Pedriza   +2 more
doaj   +1 more source

Specific wavelength colorimeter [PDF]

open access: yes, 1974
A self contained, specific wavelength, single beam colorimeter is described for direct spectrophotometric measurement of the concentration of a given solute in a test sample.
Brawner, C. C.   +2 more
core   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

open access: yesFEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li   +2 more
wiley   +1 more source

Research on infrared emission spectra of pulverized coal ash deposits [PDF]

open access: yesFME Transactions, 2013
This paper deals with thermal radiation properties of ash deposits on a pulverized coal boiler of an electric power plant. Normal emittance spectra in the 2.5-25 μm interval, and total normal emittance, were measured on 2 kinds of ash layers of a mm ...
Saljnikov Aleksandar   +4 more
doaj  

Physiological assessment of water deficit in soybean using midday leaf water potential and spectral features

open access: yesJournal of Plant Interactions, 2019
Drought is one of the major abiotic stresses that limit soybean production worldwide. This study was conducted to determine whether soybean cultivars with divergent growth habits respond differently to drought stress at the vegetative growth stage ...
Chathurika Wijewardana   +7 more
doaj   +1 more source

Influence of Irradiance and Wavelength on the Antioxidant Activity and Carotenoids Accumulation in Muriellopsis sp. Isolated from the Antofagasta Coastal Desert

open access: yesMolecules, 2022
Microalgae are a valuable natural resource for a variety of biocompounds such as carotenoids. The use of different light spectra and irradiance has been considered as a promising option to improve the production of these compounds.
Daniela Diaz-MacAdoo   +2 more
doaj   +1 more source

Generation of pulsed dual wavelength erbium doped fiber laser [PDF]

open access: yes, 2019
Single and dual wavelength fiber lasers and pulsed fiber lasers are well-known to be used for various applications. In the generation of dual wavelength fiber lasers and pulsed fiber lasers, the researchers found the mode competition among the dual ...
Abdul Hadi, Fatin Shaqira
core  

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