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Spontánní sukcese na mladém opuštěném poli
VÍTOVCOVÁ, Kamila
V této práci byl sldován průběh spontánní sukcese na dvou různě starých polích. Hlavním cílem bylo odpovědět na otázky: Jsou rozdíly ve vegetaci v různých vzdálenostech od louky? Které konkrétní druhy se nejlépe šíří od zdroje diaspor? Byl nalezen signifikantní vliv blízkosti louky na vegetaci opuštěného pole. Sukcese vede rychleji k obnově lučního společenstva.
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Control system of the electronic shutter
Kostka, František
Application of the electronic shutters lies, in addition to the electronic cameras, mainly in the field of photonics, photometry, holography, and by their exposition of photographic materials in optical laboratories. The contribution delas with the principles of control of the electronic shutter and with the construction of the control systems.
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Technolgy of materials preparation for the high sensitivity infrared detectors
Novotný, Jan ; Zelinka, Jiří ; Franc, J.
Single crystals of triglycine sulphate (TGS) doped with L-alanin, lysin and with Co.sup.2+.sup., Cd.sup.2+.sup. and PO.sub.4./sub..sup.3-.sup. were grown from aqueous solutions by means of slow cooling method. Concentration of doping elements varied from 5 to 20mol. per cent. Morphology, domain structure and P-E hysteresis loops have been investigated. TGS single crystals doped with Co.sup.2+.sup. and PO.sub.4./sub..sup.3-.sup. show the inernal fields as high as 217 kV/m with peculiarities in the hysteresis loops. The best hysteresis loop has been obtained on TGS crystal doped with Lysin and Cd.sup.2+.sup. ions.
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