scholarly journals The influence of ambient environmental conditions in detecting bridge concrete deck delamination using infrared thermography (IRT)

2020 ◽  
Vol 27 (4) ◽  
Author(s):  
Babar Nasim Khan Raja ◽  
Saeed Miramini ◽  
Colin Duffield ◽  
Massoud Sofi ◽  
Priyan Mendis ◽  
...  
Keyword(s):  
Infrared Thermography ◽  
Environmental Conditions ◽  
Concrete Deck

scholarly journals Developing Guidelines for the Use of Passive Thermography on Cultural Heritage in Tropical Climates

2020 ◽  
Vol 10 (23) ◽  
pp. 8411
Author(s):  
Manogna Kavuru ◽  
Elisabetta Rosina
Keyword(s):  
Cultural Heritage ◽  
Infrared Thermography ◽  
Environmental Conditions ◽  
Best Practice ◽  
Historic Buildings ◽  
Thermal Camera ◽  
Practical Applications ◽  
Promising Tool ◽  
Practice Methods ◽  
Tropical Climates

Infrared thermography (IRT) has been a very successful tool for the diagnosis and monitoring of cultural heritage restoration projects. It has been used to identify anomalies, moisture issues, etc., in historic buildings. Although it is a promising tool, one of the limitations is that a method to deploy it onsite has not been standardized. This is due to the different variables that might affect thermal signatures captured by the thermal camera, when onsite. Especially since environmental conditions play a major role in thermography, the process must vary from region to region significantly. That said, efforts have been made over the years to establish some base standards for designated purposes of infrared thermography in the construction field. These standards and best practice methods, although comprehensive, do not effectively help with issues that are contextual to the location of the building, for instance, tropical climates, such as India. This paper aims to suggest guidelines for a passive approach of thermography, based on practical applications and procedures followed during the thermographic survey at the former British Residency in Hyderabad, India. Additionally, this paper explores the avenues through which region specific guidelines can be established.

scholarly journals Comparison of Two IR Cameras for Assessing Body Temperature

2021 ◽  
Vol 8 (1) ◽  
pp. 7
Author(s):  
Eva Barreira ◽  
Ricardo M. S. F. Almeida ◽  
Maria Lurdes Simões ◽  
Tiago S. F. Sousa
Keyword(s):  
Body Temperature ◽  
Thermal Comfort ◽  
Ambient Temperature ◽  
Infrared Thermography ◽  
Diagnostic Tool ◽  
Environmental Conditions ◽  
Image Resolution ◽  
Human Diseases ◽  
The Subject ◽  
Key Parameter

Infrared thermography is often used to assess body temperature. It is a useful diagnostic tool for detecting human diseases but, nowadays, is has found a new applicability as an instrument of control during the crisis of the COVID-19 pandemic. Some authors also used it to assess thermal comfort inside buildings. However, some understudied issues still remain regarding the influence on the measurement of the environmental conditions, the position of the subject and the equipment characteristics. This paper attempts to address some of these issues, highlighting that ambient temperature has an impact on image resolution. Additionally, the position of the subject is a key parameter when assessing body temperature, and different equipment deliver different results.

Vibration Isolator System for Electron Microscope

1990 ◽  
Vol 48 (1) ◽  
pp. 182-183
Author(s):  
K. Ohi ◽  
M. Mizuno ◽  
T. Kasai ◽  
Y. Ohkura ◽  
K. Mizuno ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Magnetic Fields ◽  
Environmental Conditions ◽  
Vibration Isolator ◽  
Air Conditioners ◽  
Vibration Isolators ◽  
Large Size ◽  
Electron Microscopes

In recent years, with electron microscopes coming into wider use, their installation environments do not necessarily give their performance full play. Their environmental conditions include air-conditioners, magnetic fields, and vibrations. We report a jointly developed entirely new vibration isolator which is effective against the vibrations transmitted from the floor.Conventionally, large-sized vibration isolators which need the digging of a pit have been used. These vibration isolators, however, are large present problems of installation and maintenance because of their large-size.Thus, we intended to make a vibration isolator which1) eliminates the need for changing the installation room2) eliminates the need of maintenance and3) are compact in size and easily installable.

The influence of external conditions on sound pressure in the pistonphone at the infrasound frequency range

2020 ◽  
pp. 67-72
Author(s):  
A. V. Konkov ◽  
D. V. Golovin
Keyword(s):  
Environmental Conditions ◽  
Sound Pressure ◽  
Primary Method ◽  
Frequency Range ◽  
External Conditions ◽  
Numerical Estimations

The influence of environmental conditions on a sound pressure reproduced by the primary method in the measuring chambers of the Pistonphone in the frequency range from 1 mHz to 250 Hz is estimated. Numerical estimations of influence of environmental conditions on sound pressure in pistonphone measuring chambers are given and special requirements to system of maintenance of required external conditions are specified.

Disentangling the role of shared ancestry and the environment on leaf stable isotopes

2019 ◽  
Author(s):  
Marko J. Spasojevic ◽  
Sören Weber1
Keyword(s):  
Stable Isotopes ◽  
Environmental Conditions ◽  
Evolutionary History ◽  
Environmental Control ◽  
Phylogenetic Signal ◽  
Individual Species ◽  
Habitat Types ◽  
Δ13c And Δ15n ◽  
Environmental Controls ◽  
Shared Ancestry

Stable carbon (C) and nitrogen (N) isotopes in plants are important indicators of plant water use efficiency and N acquisition strategies. While often regarded as being under environmental control, there is growing evidence that evolutionary history may also shape variation in stable isotope ratios (δ13C and δ15N) among plant species. Here we examined patterns of foliar δ13C and δ15N in alpine tundra for 59 species in 20 plant families. To assess the importance of environmental controls and evolutionary history, we examined if average δ13C and δ15N predictably differed among habitat types, if individual species exhibited intraspecific trait variation (ITV) in δ13C and δ15N, and if there were a significant phylogenetic signal in δ13C and δ15N. We found that variation among habitat types in both δ13C and δ15N mirrored well-known patterns of water and nitrogen limitation. Conversely, we also found that 40% of species exhibited no ITV in δ13C and 35% of species exhibited no ITV in δ15N, suggesting that some species are under stronger evolutionary control. However, we only found a modest signal of phylogenetic conservatism in δ13C and no phylogenetic signal in δ15N suggesting that shared ancestry is a weaker driver of tundra wide variation in stable isotopes. Together, our results suggest that both evolutionary history and local environmental conditions play a role in determining variation in δ13C and δ15N and that considering both factors can help with interpreting isotope patterns in nature and with predicting which species may be able to respond to rapidly changing environmental conditions.

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