Rethinking Active Matter: Current Developments in Active Materials

2021 ◽  
pp. 191-222
Author(s):  
Mohammad Fardin Gholami ◽  
Lorenzo Guiducci ◽  
Susanne Jany ◽  
Khashayar Razghandi
1918 ◽  
Vol 5 (6) ◽  
pp. 276-277
Author(s):  
R. M. Deeley

In an article by Dr. H. Jeffreys in the Geological Magazine for April, pp. 215–19, an attempt is made to show that the discovery of radio-active materials in the earth's crust favours the “contraction and puckering” theory of mountain building. With regard to 0. Fisher's view he writes, “It rests entirely on Kelvin's theory of the cooling of the earth, which has had to be completely revised on account of the discovery of the extensive distribution of radio-active matter in the earth's crust. The time available has been found to be about twenty times greater than on Kelvin's theory, and the cooling has therefore had time to extend to a much greater depth and to produce a very much greater compression.” We are also told what the reduction in the earth's diameter has probably been, and the actual depth of Fisher's level of no strain.


1879 ◽  
Vol 8 (208supp) ◽  
pp. 3313-3313
Author(s):  
M. Dubrunfaut
Keyword(s):  

Author(s):  
Richard Wigmans

This chapter deals with the signals produced by particles that are being absorbed in a calorimeter. The calorimeter response is defined as the average signal produced per unit energy deposited in this absorption process, for example in terms of picoCoulombs per GeV. Defined in this way, a linear calorimeter has a constant response. Typically, the response of the calorimeter depends on the type of particle absorbed in it. Also, most calorimeters are non-linear for hadronic shower detection. This is the essence of the so-called non-compensation problem, which has in practice major consequences for the performance of calorimeters. The origins of this problem, and its possible solutions are described. The roles of the sampling fraction, the sampling frequency, the signal integration time and the choice of the absorber and active materials are examined in detail. Important parameters, such as the e/mip and e/h values, are defined and methods to determine their value are described.


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