Environmental relative humidity affects Schirmer tear test results in normal dogs

2020 ◽  
Vol 23 (5) ◽  
pp. 923-926
Author(s):  
Angela Yoon ◽  
Chin‐Chi Liu ◽  
Renee T. Carter ◽  
Andrew C. Lewin
Keyword(s):  
Relative Humidity ◽  
Test Results ◽  
Schirmer Tear Test ◽  
Environmental Relative Humidity

scholarly journals Water Distribution and Natural Moisturizer Factor Content in Human Skin Equivalents Are Regulated by Environmental Relative Humidity

2008 ◽  
Vol 128 (2) ◽  
pp. 378-388 ◽  
Author(s):  
Joke A. Bouwstra ◽  
H. Wouter W. Groenink ◽  
Joop A. Kempenaar ◽  
Stefan G. Romeijn ◽  
Maria Ponec
Keyword(s):  
Relative Humidity ◽  
Human Skin ◽  
Water Distribution ◽  
Factor Content ◽  
Skin Equivalents ◽  
Environmental Relative Humidity

Influence of environmental relative humidity on the polarization behaviour of paper and paper-dielectric structures

Cellulose ◽  
2020 ◽  
Vol 27 (17) ◽  
pp. 10303-10312
Author(s):  
R. Maldzius ◽  
T. Lozovski ◽  
J. Sidaravicius ◽  
K. Backfolk ◽  
I. Heiskanen
Keyword(s):  
Relative Humidity ◽  
Environmental Relative Humidity ◽  
Polarization Behaviour ◽  
Dielectric Structures

scholarly journals Effects of Variable Humidity on the Creep Behavior of Concrete and the Long-Term Deflection of RC Beams

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Pengfei Li ◽  
Shiqin He
Keyword(s):  
Experimental Data ◽  
Relative Humidity ◽  
Creep Strain ◽  
Analytical Models ◽  
Deformation Characteristics ◽  
Rc Beams ◽  
Test Results ◽  
Sustained Loads ◽  
Average Relative Humidity

The influences of variable humidity on the creep behaviors of concrete and the long-term deflections of RC beams are analyzed in this paper. A total of 6 prismatic specimens and 5 RC beams were subjected to sustained loads and 3 types of variable humidity conditions for 331 days. The creep strains of the prismatic specimens and the deflections of the RC beams were recorded to investigate the long-term deformation characteristics. The test results reveal that both the creep strain and the deflection of specimens under cyclic humidity conditions exhibit approximately linear tendencies that are obviously less than those of specimens exposed only to natural air. During certain wetting cycles, the deformation rate became slower and the creep strain even recovered with an increase in the humidity, especially for shorter wetting-drying cycles. Long-term deflections predicted using the CEB-FIP 90 and ACI 209R models were compared with the test results to evaluate the versatility of these current specifications. The findings included rather large errors between the predicted results and experimental data when the average relative humidity was adopted in the analytical models.

Effect of environmental relative humidity in the tensile strength of layering in slate stone

2019 ◽  
Vol 79 (3) ◽  
pp. 1399-1411 ◽  
Author(s):  
C. C. Garcia-Fernandez ◽  
M. I. Alvarez-Fernandez ◽  
R. Cardoso ◽  
C. Gonzalez-Nicieza
Keyword(s):  
Tensile Strength ◽  
Relative Humidity ◽  
Environmental Relative Humidity

EFFECT OF HUMIDITY ON TRIBOLOGICAL PROPERTIES OF SELECTED FRICTION JUNCTIONS WITH AN EVALUATION OF ACOUSTIC EMISSION

Tribologia ◽  
2021 ◽  
Vol 297 (3) ◽  
pp. 9-18
Author(s):  
Tomasz Desaniuk ◽  
Dominika Soboń ◽  
Wojciech Jurczak
Keyword(s):  
Relative Humidity ◽  
Friction And Wear ◽  
Sliding Mode ◽  
Operating Parameters ◽  
Linear Wear ◽  
Test Results ◽  
Tribological Test ◽  
Wear And Friction ◽  
Disc Configuration ◽  
Ball On Disc

The study aimed to compare the effect of humidity on the operation of tribological systems. The tested friction and wear are external properties; therefore, their values may differ significantly depending on the operating parameters of the friction junction and environmental conditions. Tribological tests were carried out on a TRB3 tribometer in a dry sliding mode at a relative humidity of 50% ± 5% and 90% ± 5% in the ball-on-disc configuration with a load of 15 N. The friction junction consisted of a sample made of 100Cr6 steel, and three counter-samples were made of 100Cr6, SiC, and Al2O3 steel. The geometric structure of the surface was examined with an optical profiler. The tribological test results showed reduced linear wear and friction coefficient at a relative humidity of 90% ± 5% compare to its 50% ± 5%. The paper also presents the results for the sound recorded in the 16-bit linear PCM standard and analysed in a Spectra-Plus program.

Measurement of the Internal Relative Humidity Distribution in Concrete

2010 ◽  
Vol 163-167 ◽  
pp. 1409-1413 ◽  
Author(s):  
Ji Kai Zhou ◽  
Xu Dong Chen ◽  
Jian Zhang ◽  
Xiao Wei Kan
Keyword(s):  
Relative Humidity ◽  
Significant Influence ◽  
Measurement System ◽  
External Environment ◽  
Measuring Method ◽  
Test Results ◽  
Moisture Contents ◽  
Cement Based Materials ◽  
Predrilled Hole ◽  
Internal Relative Humidity

The internal relative humidity (RH) and humidity gradients in concrete at early ages have a significant influence upon the properties of concrete, where exists a great discrepancy among the test results under different methods. By comparing and analyzing the traditional measuring methods of the RH in concrete, a new measuring method will be developed in this study, which could measure the internal RH in cement-based materials accurately, conveniently and digitally. The changing laws of the internal RH in concrete at early ages were discussed. The results indicate that the measuring results under the new developed system was more accurate than that by the predrilled hole method, while the external environment does not have any effect on the measured results obtained by using the new measurement system. What’s more, the results achieved by the new developed system approached the real RH in concrete very quickly; the RH near the surface of the specimen decreased quickly, while the RH in the center of the specimen decreased slowly, the moisture contents unevenly distributed through the various height of the specimen. Hence, there exists an obvious humidity gradient in concrete.

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