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Speech processing
Vích, Robert
2009 - anglický
Proceedings of the Workshop on Speech Processing is a periodic publication collecting the contributions presented at the Czech-German Workshop organized every year in September in Prague This proceedings volume includes 22 papers by 45 authors. Papers are devoted to phonetics and prosody, construction of dialogs, speech analysis, synthesis and enhancement, speaker and speech recognition and voice conversion.
Klíčová slova:
speech analysis; Speech synthesis
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Speech processing
Proceedings of the Workshop on Speech Processing is a periodic publication collecting the contributions presented at the Czech-German Workshop organized every year in September in Prague This ...
Films of Metal Nanoparticles Deposited on Semiconductors by Electrophoresis: Technology and Characterization
Žďánský, Karel; Zavadil, Jiří; Kacerovský, Pavel; Kostka, František; Lorinčík, Jan; Černohorský, O.; Fojtík, A.; Müller, M.; Kostejn, M.
2009 - anglický
Layers of nanoparticles in micelle enclosures were deposited on InP substrates by electrophoresis from isooctane colloid solutions containing Pd or Ag nanoparticles. The layers were investigated by SIMS, low-temperature photoluminescence spectroscopy and topography, absorption spectroscopy, Raman spectroscopy and sensitivity to hydrogen. Photoluminescence of InP was enhanced by the layers of Pd or Ag nanoparticles. Schottky barriers made on the n-type InP with layers containing Pd nanoparticles showed significant sensitivity to hydrogen in contrast to those containing Ag nanoparticles.
Klíčová slova:
semiconductor devices; nanostructures; sensors
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Films of Metal Nanoparticles Deposited on Semiconductors by Electrophoresis: Technology and Characterization
Layers of nanoparticles in micelle enclosures were deposited on InP substrates by electrophoresis from isooctane colloid solutions containing Pd or Ag nanoparticles. The layers were investigated by ...
GROWTH OF InP CRYSTALS WITH RARE-EARTH ELEMENTS
Yatskiv, Roman; Grym, Jan; Žďánský, Karel; Pekárek, Ladislav; Zavadil, Jiří
2009 - anglický
We report on the influence of rare earth (RE) elements (Pr, Er, and Dy) addition during vertical Bridgman low pressure synthesis on the properties of InP crystals. The temperature dependent Hall measurement and low temperature photoluminescence (PL) spectroscopy were employed to study the changes in electrical and optical properties of the crystals. The observed changes are attributed to the gettering effect of REs caused by the high affinity of REs towards shallow impurities in InP.
Klíčová slova:
Rare-earth elements; Crystals growth; InP
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
GROWTH OF InP CRYSTALS WITH RARE-EARTH ELEMENTS
We report on the influence of rare earth (RE) elements (Pr, Er, and Dy) addition during vertical Bridgman low pressure synthesis on the properties of InP crystals. The temperature dependent Hall ...
Control system of the Heat Flux furnace
Kostka, František; Zelinka, Jiří; Kostka, Petr; Houška, Zdeněk; Zavadil, Jiří; Starý, Robert; Krechler, Jindřich; Žďánský, Karel
2008 - anglický
A control system for a two-crucible furnace for DTA has been designed and realized. Samples of heavy metal oxide glasses have been analysed by the system.
Klíčová slova:
control systems; Furnace; Differential thermal analysis
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Control system of the Heat Flux furnace
A control system for a two-crucible furnace for DTA has been designed and realized. Samples of heavy metal oxide glasses have been analysed by the system.
LPE Growth of III-V Semiconductors from rare-earth Treated Melts
Grym, Jan; Procházková, Olga; Zavadil, Jiří; Žďánský, Karel
2008 - anglický
We focus on the characterization of InP and InGaAsP layers prepared by liquid phase epitaxy with rare-earth admixtures. We applied photoluminescence spectroscopy (PL), capacitance-voltage measurements, and secondary ion mass spectroscopy in order to explain: (i) the gettering effect and conductivity crossover of InP layers for Pr treated samples, (ii) narrowing of the PL and elecroluminescent spectra of the active InGaAsP region of a double-heterostructure LED.
Klíčová slova:
semiconductor technology; rare earth elements; III-V semiconductors
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
LPE Growth of III-V Semiconductors from rare-earth Treated Melts
We focus on the characterization of InP and InGaAsP layers prepared by liquid phase epitaxy with rare-earth admixtures. We applied photoluminescence spectroscopy (PL), capacitance-voltage ...
Measurement of electrical and mechanical oscillations of yeast cells membrane in acoustic frequency range
Jelínek, František; Pokorný, Jiří; Vaniš, Jan; Hašek, Jiří; Šimša, Jan
2008 - anglický
The paper describes the measurement of electric activity of yeast cells at frequencies around 1 kHz and of mechanical vibrations of cell membrane. Synchronized and non-synchronized tubulin mutants of yeast cells were measured. The paper includes a description of the laboratory equipment with a platinum wire point sensor and a spectrum analyzer. Obtained results are in good agreement with AFM findings.
Klíčová slova:
Cellular Biophysics; Electromagnetic Fields
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Measurement of electrical and mechanical oscillations of yeast cells membrane in acoustic frequency range
The paper describes the measurement of electric activity of yeast cells at frequencies around 1 kHz and of mechanical vibrations of cell membrane. Synchronized and non-synchronized tubulin mutants of ...
Introduction to confocal microscopy, 3D imaging with Leica SPE
Pala, Jan; Krist, P.; Sendrowski, P.
2008 - anglický
The article deals with the contemporary state of art of confocal microscopy. Článek pojednává o současném stavu konfokální mikroskopie.
Klíčová slova:
microscopy; diffraction; laser beams
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Introduction to confocal microscopy, 3D imaging with Leica SPE
The article deals with the contemporary state of art of confocal microscopy.
Článek pojednává o současném stavu konfokální mikroskopie.
Growth of InP crystals for radiation detectors and other application
Pekárek, Ladislav; Yatskiv, Roman
2008 - anglický
Bulk InP single crystals were grown by Czochralski method. Various dopants were added to the melt to obtain single crystals suitable for radiation detectors and other application. The intentionally doped of InP crystals were characterized by measurements of resistivity and Hall coefficient. Prototype detectors were prepared and evaluated by spectral detection of alpha particles and x-rays.
Klíčová slova:
crystal growth; radiation detector; InP
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Growth of InP crystals for radiation detectors and other application
Bulk InP single crystals were grown by Czochralski method. Various dopants were added to the melt to obtain single crystals suitable for radiation detectors and other application. The intentionally ...
Proceedings of Advances in Widefield and Confocal Fluorescence Microscopy
Pala, Jan
2008 - anglický
Workshop in Ljubljana was focused on major aspects of contemporary widefield and confocal fluorescence microscopy. It covered topics from basic technical background of high-end optical microscopy to the most sophisticated applications. Workshop v Ljubljani byl zaměřen na hlavní oblasti současné nekonfokální a konfokální fluorescenční mikroskopie. Přednášky začínaly od základního technického pozadí pokročilé optické mikroskopie až po nejsložitější aplikace.
Klíčová slova:
optical microscopy; fluorescence; laser beams
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Proceedings of Advances in Widefield and Confocal Fluorescence Microscopy
Workshop in Ljubljana was focused on major aspects of contemporary widefield and confocal fluorescence microscopy. It covered topics from basic technical background of high-end optical microscopy to ...
Application of speech recognition and rhyme tests for assessement of Czech speech processing systems
Vích, Robert; Nouza, Jan
2008 - anglický
Speech intelligibility is the most important parameter of speech quality. In the contribution a new objective intelligibility assessment of speech processing algorithms, e.g., speech coding, synthesis, enhancement, conversion, is proposed. It is based on automatic speech recognition of rhyme tests. The idea is illustrated by comparison with listening evaluation of Czech rhyme tests and is applied for intelligibility assessment of Czech text-to-speech system and voice conversion. Srozumitelnost řeči je nejdůležitější ukazatel kvality řeči. V příspěvku je popsán návrh nového objektivního hodnocení srozumitelnosti algoritmů pro zpracování řeči, např. kódování, syntézy, zvýrazňování a konverse řeči. Je založen na automatickém rozpoznávání rýmových testů. Myšlenka je ilustrována porovnáním s poslechovým hodnocením českých rýmových testů a je použita na hodnocení srozumitelnosti českého systému pro převod textu na řeč a pro konversi hlasu.
Klíčová slova:
speech processing; speech synthesis; speech recognition
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Application of speech recognition and rhyme tests for assessement of Czech speech processing systems
Speech intelligibility is the most important parameter of speech quality. In the contribution a new objective intelligibility assessment of speech processing algorithms, e.g., speech coding, ...
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