National Repository of Grey Literature 205 records found  1 - 10nextend  jump to record: Search took 0.05 seconds. 
Control system for optical deflector
Silva, J. ; Kostka, František ; Krechler, Jindřich
The PC control unit for the movement of the plan-parallel optical plate for the exposition of the large optic gratings.
Control system of sectrometer Oriel
Kostka, František ; Krechler, Jindřich ; Ronovský, Petr
The PC control unit for measurement of optical spectra through spectrometer Oriel is described. The analog data from optical detectors are converted to digital form and stored in HDD of PC machine.
Interface of cryostat motor control
Kostka, František ; Krechler, Jindřich ; Silva, J. ; Ronovský, Petr
The PC control unit for the movement of the measurement sample and temperature control is described. The device is dedicated for secondary emission of semiconductors samples measurement.
Control system for Eurotherm controller
Kostka, František ; Krechler, Jindřich ; Ronovský, Petr
Software for measuring secondary luminiscation is described. Software can switch power grades of heating and can gain actual temperature from Eurotherm controller.
Autofluorescence spectra of bronchial cancerous tumours
Votruba, J. ; Javorský, Stanislav ; Stádník, Bohumil
Autofluorescence spectra are significant markers of various cancerous tumours. They are produces by fluorophores which are naturally present in a human body. The main purpose of this report is to summarize the present-day data and, in such a way, to give the basis for further autofluorescence research of cancers.
Preliminary balistic electron emission microscopy/spectroscopy characterization of InAs quantum dots in AlGaAs/GaAs heterostructure
Vaniš, Jan ; Henini, M. ; Šroubek, Filip ; Walachová, Jarmila
We presented a characterization of InAs self assembled quantum dots embedded in quantum well of the AlGaAs/GaAs heterostructure using ballistic electron emission microscopy/spectroscopy BEEM/BEES. Structures are grown by MBE. Results of spectroscopic measurements "on the dot" and "out of the dot" are also presented.
Annealing of Bi.sub.2./sub.Te.sub.3./sub. thin films prepared by pulsed laser deposition
Pavelka, Martin ; Zeipl, Radek ; Jelínek, Miroslav ; Walachová, Jarmila ; Studnička, Václav
Bi.sub.2./sub.Te.sub.3./sub. thin films were prepared by laser ablation /PLD/ at room temperature and then annealed in argon atmosphere. Anneling is a widely used method of film properties /primarily crystallinity/ improvement. The influence of annealing on transport properties was studied.
Modification of Bi.sub.2./sub.Te.sub.3./sub. nanolayers
Zeipl, Radek ; Pavelka, Martin ; Jelínek, Miroslav ; Vaniš, Jan ; Šroubek, Filip ; Walachová, Jarmila
Our Bi.sub.2./sub.Te.sub.3./sub. nanolayers were prepared by laser ablation. If we use different depositon condition, prepared layers will have different properties, exactly with rising temperature of substrate during deposition laeyrs becoming smoother. We present STM picture of 60nm thick Bi.sub.2./sub.Te.sub.3./sub. prepared on substrate with temperature during deposition of 400.sup.0.sup.C. We also present modification of layer after many scans were realized by STM on the same place.
Diffraction efficiency of surface relief gratings
Hradil, Milan
Diffraction efficiency of surface-relief gratings with various profiles is discussed. The general relation for the diffraction efficiency is derived from the Frauenhoffer approximation. The general relation is applied for several profiles. It is pointed out that shallow profiles can provide high diffraction efficiencies.
Software radio in the mobile radio-communication /telephony/
Ďurovič, Svetozár
In the paper various applications of software radio in wideband mobile telephony systems are presented. The architecture of the basic parts of the mobile systems 3G is described and special attention to the technical problems is given. The report contains many computer programs to illustrate the mathematical procedures.

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