Results 51 to 60 of about 559,916 (326)

High-efficiency cathode elements for gas-discharge light sources

open access: yesТехнологія та конструювання в електронній апаратурі, 2009
The use of cathode elements of an arc discharge activator made from a newly developed material — an alloy of iridium with rare-earth metals of the cerium group — has been proposed. Working samples of arc lamps have been manufactured and tested.
V. V. Sevastyanov, V. V. Shutovsky
doaj  

Oxygen-Helium Gas Mixture «Heliox» for the Treatment of Respiratory Failure in Patients with New Coronavirus Infection Covid-19 (Randomized Single-Center Controlled Trial)

open access: yesНеотложная медицинская помощь, 2021
Introduction. Treatment of respiratory failure in pneumonia caused by coronavirus infection (COVID-19) is still an unsolved problem that requires a comprehensive approach and the development of new methods that expand the range of possibilities of modern
R. E. Lakhin   +6 more
doaj   +1 more source

Effects of a New Triple-alpha Reaction on X-ray Bursts of a Helium Accreting Neutron Star

open access: yes, 2012
The effects of a new triple-$\alpha$ reaction rate (OKK rate) on the helium flash of a helium accreting neutron star in a binary system have been investigated.
Fynbo   +7 more
core   +1 more source

Boosting the Energy Density of “Anode‐Free” Lithium Metal Batteries via Electrospun Polymeric Scaffolds

open access: yesAdvanced Functional Materials, EarlyView.
While host structures are known to enhance the reversibility and safety of lithium metal deposition, their additional volume and weight often decrease the battery's energy density and specific energy. By combining a lightweight and porous scaffold of electrospun polymer with a thinner separator, this article demonstrates a simultaneous improvement of ...
Lennart Wichmann   +6 more
wiley   +1 more source

Hybrid integrated circuits for sound signal processing

open access: yesТехнологія та конструювання в електронній апаратурі, 2011
Developed hybrid integrated circuit with rated supply voltage of 1,4 V, current consumption 0,7 mA and overall dimensions 8×4×3 mm provides soft processing of the audio signal in analog microelectronic equipment.
V. A. Koval’chuk, V. V. Sevast’yanov
doaj  

A narrative review of particle therapy in cancer

open access: yesCancer Research, Statistics, and Treatment, 2023
The use of high-energy charged particles in radiotherapy has evolved into an advanced cancer treatment. Even though proton beams and carbon ions are currently the popular particles used for radiotherapy in cancer, ions such as pions, helium, argon, and ...
Mayakannan Krishnan, C P Ranjith
doaj   +1 more source

Time damping of non-adiabatic magnetohydrodynamic waves in a partially ionized prominence plasma: Effect of helium

open access: yes, 2009
Prominences are partially ionized, magnetized plasmas embedded in the solar corona. Damped oscillations and propagating waves are commonly observed. These oscillations have been interpreted in terms of magnetohydrodynamic (MHD) waves.
Ballester, J. L., Oliver, R., Soler, R.
core   +1 more source

Ion‐Selective Microporous Membranes via One‐Step Copolymerization Enable High‐Performance Redox Flow Batteries

open access: yesAdvanced Functional Materials, EarlyView.
A scalable one‐step copolymerization strategy is developed to produce low‐cost microporous ion exchange membranes that boost both the efficiency and lifespan of flow batteries. When combined with organic electrolytes in aqueous systems, these membranes enable safe and cheap flow battery energy storage, supporting the widespread integration of renewable
Jiaye Liu   +7 more
wiley   +1 more source

Advantages and disadvantages of substitution of helium as carrier gas in gas chromatography by hydrogen. Part II. - Retention time and selectivity.

open access: yesKvasný průmysl, 2013
Gas chromatography often uses helium, hydrogen, and nitrogen as carrier gases. The most common carrier gas is helium since it provides good separations, is inert, and is safe to use.
Tomáš HORÁK   +3 more
doaj   +1 more source

Reducing bubbles in glass coatings improves electrical breakdown strength [PDF]

open access: yes, 1968
Helium reduces bubbles in glass coatings of accelerator grids for ion thrustors. Fusing the coating in a helium atmosphere creates helium bubbles in the glass.
Banks, B.
core   +1 more source

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