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Introduction to confocal microscopy, 3D imaging with Leica SPE
Pala, Jan; Krist, P.; Sendrowski, P.
2008 - English
Článek pojednává o současném stavu konfokální mikroskopie. The article deals with the contemporary state of art of confocal microscopy.
Keywords:
microscopy; diffraction; laser beams
Available at various institutes of the ASCR
Introduction to confocal microscopy, 3D imaging with Leica SPE
Článek pojednává o současném stavu konfokální mikroskopie.
Fiberisation of access networks - update
Kuchar, Anton; Hrstka, J.
2008 - Czech
Up-to-date information on the progress in implementation of optical access networks abroad and in the Czech Republic is given. Special attention is given to the situation in Europe, progress in this area in France, where mass implementation of optical fibres in access network has already begun, a is described in detail. A list of companies providing access to broadband networks over optical fibre links in the CR is given and the main obstacles to accelerate this process are identified. V práci jsou uvedeny aktuální informace o postupu v zavádění optiky do přístupových sítí ve světě i v ČR. Důraz je kladen na rozbor situace v Evropě, podrobně je popsán proces optifikace přístupových sítí ve Francii, kde se již tyto sítě budují masově. Je uveden podrobný seznam společností, které realizují optické přístupové sítě v ČR a identifikovány hlavní překážky bránící rychlejší výstavbě těchto sítí.
Keywords:
optical communication; telecommunication networks
Available at various institutes of the ASCR
Fiberisation of access networks - update
Up-to-date information on the progress in implementation of optical access networks abroad and in the Czech Republic is given. Special attention is given to the situation in Europe, progress in this ...
Optics and its competitors in access networks
Kuchar, Anton
2008 - Czech
Various technology options of telecommunications access networks are discussed: metallic, optical fibre and wireless. They are compared according to their achievable technical parameters, capital (CAPEX) and operational expenses (OPEX), legislative constraints and prospects for further development. Market share of the major access technologies in Japan, Norway, Ireland and the Czech Republic are given V práci jsou diskutovány různé technologické varianty přístupových sítí: metalické, optické a bezdrátové. Jsou posouzeny a porovnány jejich vlastnosti z hlediska dosažitelných technických parametrů, nákladů na jejich výstavbu a provoz, legislativních omezení a perspektiv dalšího rozvoje. Je uvedeno rozdělení trhu podle přístupového média v Japonsku, Norsku, Irsku a ČR ke konci r. 2007.
Keywords:
optical communication; telecommunication networks
Available at various institutes of the ASCR
Optics and its competitors in access networks
Various technology options of telecommunications access networks are discussed: metallic, optical fibre and wireless. They are compared according to their achievable technical parameters, capital ...
Growth of InP crystals for radiation detectors and other application
Pekárek, Ladislav; Yatskiv, Roman
2008 - English
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.
Keywords:
crystal growth; radiation detector; InP
Available at various institutes of the ASCR
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 - English
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. 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.
Keywords:
optical microscopy; fluorescence; laser beams
Available at various institutes of the ASCR
Proceedings of Advances in Widefield and Confocal Fluorescence Microscopy
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 ...
Application of speech recognition and rhyme tests for assessement of Czech speech processing systems
Vích, Robert; Nouza, Jan
2008 - English
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. 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.
Keywords:
speech processing; speech synthesis; speech recognition
Available at various institutes of the ASCR
Application of speech recognition and rhyme tests for assessement of Czech speech processing systems
Srozumitelnost řeči je nejdůležitější ukazatel kvality řeči. V příspěvku je popsán návrh nového objektivního hodnocení srozumitelnosti algoritmů pro zpracování řeči, např. kódování, syntézy, ...
Ultra low frequency yeast cells electric activity
Cifra, Michal; Pokorný, Jiří; Jelínek, František; Hašek, Jiří; Šimša, Jan
2008 - English
This paper presents results from the measurement of the electrical activity cold sensitive beta-tubulin mutant tub2-401 of yeast cells in frequency region 0.4 - 1.6 kHz. 25 measurements of both synchronized and nonsynchronized cells show that the synchronized cells have higher electrical activity what corresponds to the findings of Pohl et al. Mechanical oscillations of electrically polar structures in cell may give rise to electric oscillations we measured.
Keywords:
bioelectric phenomena; cellular biophysics; biomembranes
Available at various institutes of the ASCR
Ultra low frequency yeast cells electric activity
This paper presents results from the measurement of the electrical activity cold sensitive beta-tubulin mutant tub2-401 of yeast cells in frequency region 0.4 - 1.6 kHz. 25 measurements of both ...
DS-CDMA signal blind MMSE detector adaptation
Šimša, Jan
2008 - English
The contribution is focused on multiusxer detection of code-division multiplexewd signals-directsequnce CDMA. A very efficient detection of an ińdividual signal within synchronous CDMA mitigating multiuser interference as well as addditive noise is MMSE multiuser detection.
Keywords:
multiuser detector; MMSE adaptive detector
Available at various institutes of the ASCR
DS-CDMA signal blind MMSE detector adaptation
The contribution is focused on multiusxer detection of code-division multiplexewd signals-directsequnce CDMA. A very efficient detection of an ińdividual signal within synchronous CDMA mitigating ...
Estimation of energy transfer parameters in thulium- and ytterbium-doped silica fibers
Peterka, Pavel; Blanc, W.; Dussardier, B.; Monnom, G.; Simpson, D. A.; Baxter, G.
2008 - English
We present an estimation of the energy transfer coefficients by comparison of the measured emission of three TYDF samples with numerical simulations of the respective emission. The energy transfer coefficients were found higher than those reported in Tm/Yb-doped fluoride based crystals. With possible improvement of excited level lifetime of thulium by high alumina codoping, it makes Tm/Yb co-doped silica fibers promising for applications in fiber lasers and amplifiers.
Keywords:
fiber lasers; thulium; fluorescence lifetime
Available at various institutes of the ASCR
Estimation of energy transfer parameters in thulium- and ytterbium-doped silica fibers
We present an estimation of the energy transfer coefficients by comparison of the measured emission of three TYDF samples with numerical simulations of the respective emission. The energy transfer ...
FTTx networks in the year 2008 – worldwide developments
Kuchar, Anton
2008 - Czech
The presentation gives an overview of the worldwide progress and trends in the development of optical access networks FTTx. Special attention is paid to situation in Europe. Competitive technologies for broadband access to the Internet are also considered. The presentation observes that while in Japan, Korea and recently also in the USA the FTTx access networks have become a massive phenomenon, in Europe FTTx are being so far built mainly by municipalities and utilities with the exception of France. Presentace obsahuje podrobný přehled vývoje a trendy budování optických přístupových sítí FTTx ve světě. Zvláštní pozornost je věnována rozboru situace v Evropě. Jsou uvažovány také konkurenční technologie pro realizaci širokopásmového přístupu k Internetu. V závěru je konstatováno, že zatímco v Japonsku, Jižní Korei a v USA zaznamenávají sítě FTTx masový rozvoj, v Evropě (včetně ČR) jsou kromě ve Francii FTTx budovány zejména z iniciativy obecních samospráv a netelekomunikačních síťových odvětví
Keywords:
optical communication; telecommunication networks
Available at various institutes of the ASCR
FTTx networks in the year 2008 – worldwide developments
The presentation gives an overview of the worldwide progress and trends in the development of optical access networks FTTx. Special attention is paid to situation in Europe. Competitive technologies ...
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