Results 41 to 50 of about 2,825,028 (241)

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

INCREASING THE LEVEL OF PHOTO BIOLOGICAL SAFETY OF THE EMISSION SPECTRUM OF AN LED LIGHT SOURCE

open access: yesСучасний стан наукових досліджень та технологій в промисловості, 2020
The subject of research is the emission spectra of light sources based on LED structures. The purpose of the work is to formulate proposals to improve the photo biological safety of LED lighting systems.
Igor Bondarenko   +3 more
doaj   +1 more source

Long-distance propagation of short-wavelength spin waves

open access: yesNature Communications, 2018
Recent years have witnessed a rapidly growing interest in exploring the use of spin waves for information transmission and computation toward establishing a spin-wave-based technology that is not only significantly more energy efficient than the CMOS ...
Chuanpu Liu   +19 more
semanticscholar   +1 more source

Environmental Cycles, Melatonin, and Circadian Control of Stress Response in Fish

open access: yesFrontiers in Endocrinology, 2019
Fish have evolved a biological clock to cope with environmental cycles, so they display circadian rhythms in most physiological functions including stress response.
Francisco Javier Sánchez-Vázquez   +5 more
doaj   +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

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

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

The Maximal Runaway Temperature of Earth-like Planets [PDF]

open access: yes, 2011
We generalize the problem of the semi-gray model to cases in which a non-negligible fraction of the stellar radiation falls on the long-wavelength range, and/or that the planetary long-wavelength emission penetrates into the transparent short wavelength ...
Brunt   +37 more
core   +1 more source

Infrared tunable laser [PDF]

open access: yes, 1973
A tunable laser apparatus is reported with a first wavelength selective reflector and a second wavelength selective reflector forming one end of an optical cavity, and a third wavelength selective reflector forming the other end of an optical cavity.
Billman, K. W.
core   +1 more source

Room temperature continuous wave operation of single-mode, edge-emitting photonic crystal Bragg lasers [PDF]

open access: yes, 2008
We report the first room temperature CW operation of two dimensional single-mode edge-emitting photonic crystal Bragg lasers. Single-mode lasing with single-lobed, diffraction limited far-fields is obtained for 100μm wide and 550μm long on-chip devices ...
DeRose, Guy A.   +4 more
core   +2 more sources

Home - About - Disclaimer - Privacy