scholarly journals The Material Ghost: Films and Their Medium (review)

Criticism ◽  
2001 ◽  
Vol 43 (1) ◽  
pp. 105-109
Author(s):  
Lesley Brill
Keyword(s):  
Medium Review

New optoelectronic erasable storage medium (review)

1987 ◽  
Vol 17 (3) ◽  
pp. 273-281
Author(s):  
N G Basov ◽  
A F Plotnikov ◽  
Yurii M Popov ◽  
V N Seleznev
Keyword(s):  
Medium Review ◽  
Storage Medium

The Medium (review)

1997 ◽  
Vol 49 (3) ◽  
pp. 357-358
Author(s):  
Attilio Favorini
Keyword(s):  
Medium Review

scholarly journals Comparison of the Efficiency of Solar Collectors in Terms of the Working Medium—Review of Selected Technical Solutions

2021 ◽  
Vol 9 (1) ◽  
pp. 5
Author(s):  
Paulina Zielinko ◽  
Dorota Anna Krawczyk
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Specific Heat ◽  
Unit Volume ◽  
Working Fluid ◽  
Medium Review ◽  
Solar Collectors ◽  
Accidental Ingestion ◽  
Working Medium ◽  
Technical Solutions

In Poland, the most commonly used solar fluid in heating installations with solar collectors are 35–50% water propylene glycol solutions or ethyl. These mixtures (with ennobling additives) effectively protect the solar installation against the effects of freezing of the working medium at low outside temperatures prevailing in winter. These solutions, compared to water, are characterized by higher viscosity and lower values of the specific heat in the range of typical working temperatures of the working fluid in the solar circuit, have a higher price per unit volume, and may cause poisoning due to accidental ingestion. It is possible in solar installations operating also in winter use of water only, without the addition of glycols, but then equipment is necessary the automatic control system controlling the installation with the protection function of anti-freeze. The aim of this study is to review selected examples of solar installations in which water was used as the solar fluid, proving the disadvantage of using glycol.

GREEN'S FUNCTION FOR AN INFINITE ANISOTROPIC MEDIUM. REVIEW

2015 ◽  
Vol 74 (12) ◽  
pp. 1039-1050 ◽  
Author(s):  
Leonid Aleksandrovich Pazynin ◽  
S. Sautbekov ◽  
Yurii Konstantinovich Sirenko ◽  
Alexey A. Vertiy ◽  
N. P. Yashina
Keyword(s):  
Green’S Function ◽  
Green's Function ◽  
Anisotropic Medium ◽  
Medium Review

The Panorama: History of a Mass Medium (review)

1999 ◽  
Vol 40 (4) ◽  
pp. 900-901
Author(s):  
Ralph Hyde
Keyword(s):  
Mass Medium ◽  
Medium Review ◽  
History Of
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