Parasites, by definition, extract energy from their hosts and thus affect trophic and food web dynamics even when the parasite may have limited effects on host population size. We studied the energetic costs of mange (Sarcoptes scabiei) in wolves (Canis lupus) using thermal cameras to estimate heat losses associated with compromised insulation during the winter. We combined the field data of kn...

Our study deals with the quantification of the energy dissipated by a defect of spalling on the outside ring of a rolling bearing. A previous work showed a correlation between the thermal heating and the vibratory level generated by the progressive appearance of the defect. First, we propose a numerical model of the heat transfers In a second time, we developed an experimental setup. The result...

Nondestructive testing (NDT) provides safe operation to engineering components – it eliminates the risk of damage during operation, and does not require specific sample preparation. It has been widely used to detect and evaluate defects, or measure properties of different types of materials and engineering structures. Examples of NDT techniques include ultrasonic, radiography, infrared thermogr...

In paper some examples of the application of the morphological operations in defect detection, using an active infrared thermography are described. The fundamentals of the mathematical morphology and the two methods of the global thresholding are presented. These methods were used to the binarization of the analyzed thermal images. Further, the results of the background estimation, using an ope...

In the earth’s atmosphere baroclinic instability is responsible for the heat and momentum transport from low to high latitudes. Baroclinic instability leads to the growth of multi-scale vortices that accomplish the meridional heat transport. Raymond Hide used a rather simple laboratory experiment to study such vortices in the lab (Hide, 1953). The experiment is comprised by a cooled inner and h...

key words: Parchment ageing, shrinkage temperature, thermal diffusivity, thermography The structure of the parchment and its preservation state have been studied by means of novel methods based on the analysis of the heat diffusion and the shrinkage activity. Investigations have been performed on modern, inked and non-inked, parchment artificially aged in different conditions, as well as on mod...

Perfusion dynamics of 16 free DIEP flaps and 4 free SIEA flaps were studied during the first, third, and sixth postoperative day using dynamic infrared thermography (DIRT). For both flap types the zone positioned over the perforator is perfused first, followed by the adjacent ipsilateral zone, and finally the contralateral zones. Perfusion of the subdermal plexus of all zones preceded the perfu...

This paper presents an approach for measuring the geometry of objects with complex shapes with a 3D camera and, at the same time, collecting surface and subsurface information that is then mapped onto the geometry in good spatial alignment. Subsurface information can be captured with infrared thermography or ultrasonic probes. The approach can thus allow non-destructive testing procedures to be...

Preservationists look to methods of nondestructive evaluation (NDE) to answer questions about the condition, strength, and construction details of wood in historic buildings in the interest of saving historic fabric and reducing or eliminating damage to significant historic features or materials caused by investigative probes. Many times, a basic wood inspection can answer questions posed when ...

We investigated various essential factors for optimum infrared thermography for cattle clinics. The effect of various factors on the detection of surface temperature was investigated in an experimental room with a fixed ambient temperature using a square positioned on a wall. Various factors of animal objects were examined using cattle to determine the relationships among presence of hair, body...