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Vyhodnocení produkce vánočních stromků ze soukromé plantáže
Liška, Matěj
The bachelor thesis deals with Christmas tree production and general economic evaluation of Christmas tree growing on a plantation. It consists of Christmas tree production and also planting, harvesting and selling Christmas trees. Some species useful for growing Christmas trees and particular technological processes leading to successful growing of trees on plantations are described. The thesis contains a market research based on prices of Christmas trees in the Czech Republic and a questionnaire, the aim of which is to explore public attitude to Christmas trees. The results show that 85 % of respondents prefer a real Christmas tree to an artificial one.
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Study of the Behaviour of Microparticle in the Standing Wave Trap
Ježek, Jan ; Jonáš, Alexandr ; Zemánek, Pavel ; Liška, M.
The basic behavior of microparticles placed in the Gaussian standing wave is studied theoretically and experimentally in this article. It is shown that the optical force depends periodically on the particle size and, as the consequence, the equilibrium object position is alternating between the standing wave antinodes and nodes. For certain particle sizes, the particle confinement is disabled. Experimental confirmation of the theoretical results is briefly discussed.
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Measurement of the Optical Trap Stiffness
Jákl, Petr ; Jonáš, Alexandr ; Zemánek, Pavel ; Liška, M.
An optical trap for dielectric microparticles is usually approximated by a parabolic potential well, whose profile is characterized by a single constant - trap stiffness. This stiffness can be estimated using several methods, including Fourier spectral analysis of the thermal noise of the trapped particle position, or method based on equipartition theorem. The principles of the trap calibration and experimental results are presented.
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