The article presents the results of studies melanin effect on recorded signals in laser Doppler flowmetry (LDF) and tissue reflectance oximetry (TO). By investigating properties microvascular blood flow skin oxygenation signals, we have gained new knowledge about race-related differences formation these signals. content intensity LDF TO methods was evaluated, limitations use representatives dif...

Earthquake is one of the most destructive natural phenomena which has human and financial losses. The existence of an efficient prediction system and early warning system will be useful for reducing effects of destroying earthquake. In this research, the soil temperature time-series data, obtained from three meteorological station, using three filters (Fourier, Wavelet and Logarithmic Different...

BACKGROUND Platelet activation can lead to enhanced oxidative stress, inflammatory response, and endothelial dysfunction. To quantify the effects of platelet inhibition on endothelial function, we assessed platelet activity of healthy persons before and after clopidogrel administration and evaluated its effects on endothelial function. We hypothesized that clopidogrel, by attenuating platelet a...

Dietary fibers (DF) may affect energy balance, an effect often ascribed to the viscous nature of some water soluble DF, which affect luminal viscosity and thus multiple physiological processes. We have tested the hypothesis that viscous linseed DF reduce apparent nutrient digestibility, and limit weight gain, in a randomized feeding trial where 60 male, growing, Wistar rats, with an initial wei...

Although the laser-Doppler flowmetry (LDF) signal from skeletal muscle has been shown to provide a good measure of blood flow under some conditions, its behavior during administration of vasoactive substances has never been addressed. The aims of this study were to compare 1) changes in LDF signal with those in total muscle blood flow measured with radioactive microspheres after ganglionic bloc...

The effects of i.p. versus i.v. glucose administration on laser Doppler flow (LDF) were studied in peripheral tissue areas of murine FSaII tumors implanted s.c. in the hind foot dorsum and in normal skin of conscious C3Hf/Sed mice. LDF was monitored prior to and continuously for 90 min following the administration of glucose, galactose, or mannitol at doses of 5 or 10 mg/g. Results showed that ...

The Pierre Auger Observatory [1] is being used to study cosmic rays with energies larger than 10 eV with unprecedented precision and statistics. An essential quantity that must be deduced from data is the lateral distribution function (LDF) that describes the decreasing of the signals in the watertanks as a function of distance. Knowledge of the LDF is important for the reconstruction of the sh...

This paper investigates construction and approximation properties of the locally divergence-free (LDF) finite elements. Numerical stability of the natural and normalized bases for the LDF elements is analyzed. Error estimates about the jumps and the total divergence of the localized L2-projection are proved and validated through numerical examples.

AIMS To evaluate different algorithms used to analyse retinal nerve fibre layer thickness (RNFL) data obtained by scanning laser polarimetry, in order to compare their relative abilities to discriminate between patients with glaucomatous localised nerve fibre layer defects and normal subjects. METHODS 48 eyes of 48 glaucomatous patients with localised RNFL defects and 53 eyes of 53 healthy su...

BACKGROUND Laser Doppler flowmetry (LDF) can reliably reflect brain perfusion in experimental stroke by monitoring both the degree and the duration of relative regional cerebral blood flow (rCBF). Variation in rCBF was continuously monitored in 68 mice undergoing middle cerebral artery occlusion (MCAO) and 25 mice undergoing sham-operation and documented as LDF (%). Transcranial LDF changes in ...