Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Dan Apostol"'
Publikováno v:
Diagnostics, Vol 11, Iss 12, p 2389 (2021)
Background: Infantile myofibromatosis (IM) is a soft tissue disease with solitary or multiple benign tumors, and an etiology still unknown. IM is a mesenchymal disorder of early infancy and is more frequent in males. IM may present as a solitary lesi
Externí odkaz:
https://doaj.org/article/3701e1915bb14d18b9444c33ac1c80bf
Publikováno v:
Optik - International Journal for Light and Electron Optics. 124:2803-2806
Autor:
Mihaela Bojan, I. Apostol, Victor Damian, Florin Garoi, D. Postolache, A. Armaselu, P. J. Morais, Dan Apostol, I. Darida, Iuliana Iordache
Publikováno v:
Optics and Spectroscopy. 111:287-292
Laser material removal applied to selective overpaintings and subsequent painting layers detachment was studied in order to select the best cleaning practice of painted artworks. The ablation depth as a function of incident laser fluence/intensity an
Publikováno v:
Optik. 122:868-871
We created a simple device for the measurement of nanoscale displacements consisting in a Twyman–Green interferometer with one mirror having a slight offset in the horizontal plane with respect to the direction perpendicular to the incoming beam an
Autor:
Petre Cătălin Logofătu, Dan Apostol
Publikováno v:
Measurement. 41:1100-1104
A new, fully statistical approach for regression analysis is presented and used for deriving the formula for the estimation error of the parameters of the fit and the associated joint confidence levels assuming a normal (Gaussian) distribution of the
Autor:
Dan Apostol, Mihai Oane
Publikováno v:
Optics & Laser Technology. 36:219-222
In this paper, we have developed an analytical model to study the temperature distributions in IR optical materials heated by laser pulses. Our model takes into account the two-photon absorption (TPA). The calculations are based on a three-dimensiona
Publikováno v:
Measurement Science and Technology. 9:1451-1455
By processing a set of three phase-shifted interferograms one can determine the actual phase steps between recordings by assuming that the calculated map of the intensity offset has the smallest pixel to pixel variations when the supposed values of t
Publikováno v:
Measurement Science and Technology. 9:744-750
A new statistical self-calibrating algorithm for phase-shift interferometry is presented. The algorithm can be applied to the case of three phase-shifted interferograms for which the assumption of a constant fringe contrast over the viewing field can
Publikováno v:
Measurement Science and Technology. 8:738-745
A new self-calibrating algorithm is described that succeeds in reconstructing an almost error-free wavefront from only three interferograms. The algorithm is based on the assumption that the optical phase, taken modulo , is quasi-uniformly distribute
Publikováno v:
Measurement Science and Technology. 7:52-57
Avery's and Simon's reflection methods for determining the optical constants n and k were analysed in order to determine the corresponding angles of incidence of greatest sensitivity. For estimating the method sensitivity we used the point sensitivit