Search results for "Materiālzinātne"
showing 10 items of 112 documents
Investigation of the characteristics of magneto-optical resonances in alkali metal vapor
2011
Abstract The main subject of this thesis is theoretical modeling of bright and dark magneto-optical resonances observable on the D1 spectral line of alkali metals. A theoretical model based on the rate equations for Zeeman coherences is em- ployed in the research. The theoretical model was developed from the optical Bloch equations, applying the rotating wave approximation and the decorrela- tion approach to stochastic dierential equations. In this thesis the theoretical model is adapted to describe magneto-optical resonances observed in alkali metal vapor that is conned in either an ordinary cm-sized cell or an extremely thin cell, whose thickness is comparable to the ex- citation waveleng…
Psihofizikāla pseidoizohromatiska testa izveide un krāsu izšķirtspējas sliekšņa novērtējums
2015
Elektroniskā versija nesatur pielikumus
Electronic excitations and processes in long lasting luminescence material SrAl2O4
2019
Persistent luminescent material SrAl2O4: Eu2+, Dy3+ is widely used and studied for energy efficient applications. A study of SrAl2O4:Eu,Dy; SrAl2O4:Dy, and undoped SrAl2O4 material was conducted. Improvements for the mechanism of persistent luminescence have been suggested, that involve tunnelling of electron from trapping center to Eu3+, and the proof for stable Dy4+ existence in strontium aluminate has been presented. Undoped material luminescence has been observed, consisting of trace impurity and intrinsic defects luminescence. The results of this work give new knowledge and improve the existing concepts of persistent luminescence in Eu activated strontium aluminates. They also open som…
Tumšajos starpzvaigžņu gāzu-putekļu miglājos esošo putekļu ietekme uz šo miglāju ķīmisko sastāvu
2013
Elektroniskā versija nesatur pielikumus
Paaugstinātas grūtības eksperimentālie un demonstrējumu pētnieciskie uzdevumi vidusskolēniem
2013
Elektroniskā versija nesatur pielikumus
IKT LIETOJUMA IESPĒJAS MATEMĀTIKAS MĀCĪŠANĀ SKOLĀ
2013
Elektroniskā versija nesatur pielikumus
Aggregation of fuzzy structures based on equivalence relations
2016
Elektroniskā versija nesatur pielikumus
Sensoru, datu uzkrājēju un interaktīvās tāfeles lietojums fizikas mācību procesā
2013
Elektroniskā versija nesatur pielikumus
ELEKTROMAGNĒTISKI IETEKMĒTU HIDRODINAMISKO PROCESU EKSPERIMENTĀLI PĒTĪJUMI ŠĶIDRU METĀLU NOSLĒGTOS TILPUMOS
2014
Elektroniskā versija nesatur pielikumus
Perifērās vizuālās informācijas ietekme uz centrālā uzdevuma izpildi
2015
Elektroniskā versija nesatur pielikumus