Linear polarization measurements by Ge(Li) detector

1969 ◽  
Vol 19 (10) ◽  
pp. 1281-1289 ◽  
Author(s):  
J. Honzátko ◽  
J. Kajfosz
Keyword(s):  
Linear Polarization ◽  
Polarization Measurements

scholarly journals Polarization Measurements of Some Herbig Ae/Be Stars

1990 ◽  
Vol 140 ◽  
pp. 323-324
Author(s):  
S. K. Jain ◽  
H.C. Bhatt ◽  
Ram Sagar
Keyword(s):  
Linear Polarization ◽  
Wavelength Dependence ◽  
Be Stars ◽  
Polarization Measurements

We have measured the linear polarization of 8 bright Herbig Ae/Be stars in UBVRI bands. No unique wavelength dependence of polarization magnitude as well as direction is found in these measurements.

Linear Polarization Measurements of Radio Sources at 18-CM Wavelength.

1964 ◽  
Vol 139 ◽  
pp. 758 ◽  
Author(s):  
D. Morris ◽  
V. Radhakrishnan ◽  
G. A. Seielstad
Keyword(s):  
Linear Polarization ◽  
Radio Sources ◽  
Polarization Measurements

scholarly journals Insights from corrosion current measurements on corrosion mechanisms in reinforced concrete and on the evaluation of other corrosion data

2019 ◽  
Vol 289 ◽  
pp. 03008 ◽  
Author(s):  
Ulrich Schneck
Keyword(s):  
Reinforced Concrete ◽  
Linear Polarization ◽  
Polarization Resistance ◽  
Corrosion Behaviour ◽  
Corrosion Current ◽  
Material Loss ◽  
Polarization Measurements ◽  
Tafel Polarization ◽  
Macro Cell ◽  
Current Densities

During the past years Tafel polarization measurements have been implemented into the scope of measurements of CITec corrosion diagnosis projects. This has created a vast database of different and corresponding corrosion parameters, such as chloride and water content in the rebar vicinity, open circuit potential, electrolyte resistance, polarization resistance (from galvanostatic pulse and linear polarization) and corrosion current from Tafel polarization measurements. Although general limitations in using these methods on macro cell systems such as reinforced concrete are known, the comparative assessment of these data has led to a better understanding of the corrosion behaviour and of specific circumstances of the structures which deviated partly from usual expectations. For instance, a low polarization resistance at high chloride content will not result necessarily in a high corrosion current, if the reinforcement in the wider vicinity of the test location is similar active, and cathodic rebar areas are either very distant or retarded by very wet concrete. So the extended range of corrosion testing gives a more precise evaluation of the corrosion situation and permits a tailored repair and maintenance concept to be found. It has also been found that the Stern-Geary equation which is often used to calculate corrosion current densities and material loss of the reinforcement from linear polarization (LPR) measurements, doesn’t seem very feasible if used on reinforced concrete structures, as there appears to be a dominant influence of macro cell corrosion over the corrosion model of a homogenous mixed electrode (for which the Stern-Geary equation applies), and the true corrosion current densities may be either larger or (very often) much smaller than those calculated from Stern-Geary. This is not a new observation, and the findings will be discussed for several project cases.

scholarly journals Optical linear polarization measurements of quasars obtained with the Very Large Telescope at Paranal Observatory

2018 ◽  
Vol 620 ◽  
pp. A68 ◽  
Author(s):  
D. Hutsemékers ◽  
B. Borguet ◽  
D. Sluse ◽  
V. Pelgrims
Keyword(s):  
Linear Polarization ◽  
Large Telescope ◽  
Polarization Measurements ◽  
Very Large Telescope ◽  
Low Dispersion

We report 87 previously unpublished optical linear polarization measurements of 86 quasars obtained in May and October 2008, and from April to July 2015 with the FOcal Reducer and low-dispersion Spectrographs FORS1 and FORS2 attached to the Very Large Telescope at the Paranal Observatory. Of the 86 quasars, 37 have p ≥ 0.6%, 9 have p ≥ 2%, and 1 has p ≥ 10%.

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