Results 21 to 30 of about 26,692 (204)

Karol Olszewski’s 100th anniversary of death and his contribution to cryogenics (in Polish) [PDF]

open access: yesPrace Komisji Historii Nauki PAU, 2015
The article briefly presents the scientific achievements of Karol Olszewski (1846–1915), who was born when Poland did not exist on the map of Europe and Polish science was developed mainly in Krakow, Lviv and at some European Universities. In 1883 Karol
Alicja RAFALSKA‑ŁASOCHA
doaj   +1 more source

Design of the Optical System for a Protomodel of Space Infrared Cryogenic System [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2005
Many technical challenges are being tried for a large space infrared telescope, which is one of the major objectives of the Strategic Technology Road Map (STRM) of KASI (Korea Astronomy and Space Science Institute).
Dae-Hee Lee   +12 more
doaj   +1 more source

On fully superconducting rectifiers and fluxpumps. A review. Part 2: Commutation modes, characteristics and switches [PDF]

open access: yes, 1981
This paper forms the second part of the review. Full and half wave superconducting transformer rectifiers are analysed. Modes of operation and loss mechanisms are detailed and a comparison between the behaviour of dynamos and rectifiers is presented ...
Kate, H.H.J. ten   +1 more
core   +2 more sources

A loss-less superconducting kilo-oersted ac magnetic field system [PDF]

open access: yes, 1977
A simple superconducting system which allows almost loss-less ac magnetic field to be generated in the kilo-oested region and in the frequency range from dc up to more than 1 kHz is described. The behaviour of commercially available superconducting wires
Bos, M.R.E.   +2 more
core   +2 more sources

Evaluation of InGaAs/InP photodiode for high-speed operation at 4 K

open access: yesInternational Journal of Metrology and Quality Engineering, 2018
An optically controlled high-speed current source located at 4 K is likely to improve the performance of pulse-driven Josephson junction arrays. A custom photodiode module with an Albis PDCS24L InGaAs/InP PIN photodiode is investigated in order to ...
Bardalen Eivind   +4 more
doaj   +1 more source

Hysteresis losses in hollow superconducting filaments and in multifilament systems [PDF]

open access: yes, 1991
The magnetization of hollow superconducting filaments in a perpendicular applied field is calculated numerically using a mathematical model. With this model the hysteresis losses over a closed cycle of the applied field, as well as the instantaneous ...
Eikelboom, J.A., Klundert, L.J.M. van de
core   +2 more sources

Computational Modeling of High-Speed Flow of Two-Phase Hydrogen through a Tube with Abrupt Expansion

open access: yesHydrogen
Hydrogen can become a prevalent renewable fuel in the future green economy, but technical and economic hurdles associated with handling hydrogen must be overcome.
Konstantin I. Matveev
doaj   +1 more source

Development of Precise Low Value Capacitance Measurement System for Cryogenics Two Phase Flow Application [PDF]

open access: yesJournal of Electrical and Electronics Engineering, 2018
In cryogenic two phase flow, it is always challenging to measure the quality and void fraction. In this regard, an effort has been made to indigenously develop an electronic circuit to measure the void fraction by measuring the capacitance of the order ...
SINGH Gaurav Kumar   +4 more
doaj  

Instrumentation Applied to Cryogenics Plants

open access: yesMeasurement + Control, 1972
The term “Cryogenic plant” refers to any plant or process designed to operate at very low temperatures, around 150 K and below. This paper deals generally with industrial air separation plants in which the separation of the main components is effected at
H Townsley
doaj   +1 more source

Ultra-high freshwater production in multistage solar membrane distillation via waste heat injection to condenser

open access: yesNature Communications
Passive solar membrane distillation (MD) is an emerging technology to alleviate water scarcity. Recently, its performance has been enhanced by multistage design, though the gains are marginal due to constrained temperature and vapor pressure gradients ...
Primož Poredoš   +6 more
doaj   +1 more source

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