MECHANISM OF DEGRADATION OF IMAGES OBSERVED THROUGH A MEDIUM WITH RANDOM INHOMOGENEITIES

2012 ◽  
Vol 3 (3) ◽  
pp. 223-232 ◽  
Author(s):  
Yu. V. Kornienko ◽  
S.I. Skuratovskiy
Keyword(s):  
Mechanism Of Degradation

scholarly journals On the Thermal Stresses Due to Weathering in Natural Stones

2021 ◽  
Vol 11 (3) ◽  
pp. 1188
Author(s):  
William Hideki Ito ◽  
Talita Scussiato ◽  
Federico Vagnon ◽  
Anna Maria Ferrero ◽  
Maria Rita Migliazza ◽  
...  
Keyword(s):  
Building Materials ◽  
Thermal Stresses ◽  
Central Italy ◽  
Theory Of Elasticity ◽  
International Standards ◽  
Natural Material ◽  
Physical Weathering ◽  
Mechanism Of Degradation ◽  
Ancient Times ◽  
Natural Stones

Natural weathering is known as one of the key mechanisms causing degradation in building materials. Great efforts have been made to develop new materials and new processes for protecting those that already exist. Natural stones are an example of a natural material that has been extensively used for building construction since ancient times. In addition, they fit durability, aesthetic, and mechanical requirements. Thus, they still have great importance in the construction business nowadays. Though chemical interactions in natural stones, such as oxidation or hydrolyses, have been widely studied, in the last few decades, the physical weathering due to daily temperature variations has begun to be considered as a key mechanism of degradation and has been incorporated in international standards. This process is particularly important in calcitic marble slabs, where it can cause extensive damages to facades. Consequently, there are restrictive rules for the use of marble as an external coating material in many countries. In this paper, the thermal stresses induced by daily variations in temperature are calculated using geographic and meteorological information. The concept of sol-air temperature is used to estimate the temperatures of the hidden and exposed surfaces of a slab, and Fourier’s law and the theory of elasticity are used to calculate the temperature and stress distribution, respectively. The proposed methodology allows for a detailed reconstruction of the stress induced inside marble slabs using parameters commonly acquired in meteorological stations as input data. The developed methodology was validated by comparing in-situ measurements of the temperature of a building in Pescara (Central Italy). A good correlation between the theoretical and real temperatures was found; in particular, the peak tensile stresses inside the slabs were estimated at 75 kPa.

Mechanism of Degradation of Methyl Bromide and Propargyl Bromide in Soil

2000 ◽  
Vol 29 (4) ◽  
pp. 1322-1328 ◽  
Author(s):  
Sharon K. Papiernik ◽  
Jianying Gan ◽  
Scott R. Yates
Keyword(s):  
Methyl Bromide ◽  
Propargyl Bromide ◽  
Mechanism Of Degradation

The mechanism of degradation of Ag/Ni multilayers deposited at different temperatures

2001 ◽  
Vol 81 (1) ◽  
pp. 1-10 ◽  
Author(s):  
K. O. Schweitz ◽  
J. B⊘ttiger ◽  
A. L. Greer ◽  
P. J. Thomas ◽  
D. T. Foord
Keyword(s):  
Mechanism Of Degradation ◽  
Different Temperatures

Exploiting microbial biomass in treating azo dyes contaminated wastewater: Mechanism of degradation and factors affecting microbial efficiency

2021 ◽  
Vol 43 ◽  
pp. 102255
Author(s):  
Riti Thapar Kapoor ◽  
Mohammed Danish ◽  
Ram Sharan Singh ◽  
Mohd Rafatullah ◽  
Abdul Khalil H.P.S.
Keyword(s):  
Microbial Biomass ◽  
Azo Dyes ◽  
Factors Affecting ◽  
Mechanism Of Degradation ◽  
Microbial Efficiency

scholarly journals Mechanism of Degradation of Organic Matter in Seawater by Effective Microbes and Its Utilization.

1997 ◽  
pp. 39-49
Author(s):  
Hitoshi Murakami ◽  
Sadahiko Itoh ◽  
Hiroyuki Mizukuchi ◽  
Yasunori Kozuki ◽  
Michikazu Ochiai
Keyword(s):  
Organic Matter ◽  
Mechanism Of Degradation
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