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Number of found documents:
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Control system of the laser topographer
Kostka, František; Žďánský, Karel; Zavadil, Jiří; Starý, Robert
2009 - English
Universal apparatus for measuring photoluminescence over surface of semiconductor samples was designed and realized.
Keywords:
control systems; Laser optic; photolominescence
Available at various institutes of the ASCR
Control system of the laser topographer
Universal apparatus for measuring photoluminescence over surface of semiconductor samples was designed and realized.
Measurement and Computer Simulation of Electromagnetic Oscillations of Living Cells
Cifra, Michal; Pokorný, Jiří; Vrba, J.
2009 - English
Frohlich postulated coherent polar oscillations as a fundamental biophysical property of biological systems. Recently, Pelling et al. (2004, 2005) detected mechanical vibrations of yeast cell membrane with atomic force microscope (AFM) and analyzed by Fourier analysis in the frequency range 0.5-2 kHz with amplitudes of the order of 1 nm. This article describes the measurement of electric activity of yeast cells in the acoustic frequency range and of mechanical vibrations of cell membrane. Spectrum analyzer and electrically and > electromagnetically screened box with point sensor and amplifiers fed by batteries were used for measurement of synchronized and non synchronized tubulin mutants of yeast cells. We show that the electric activity of synchronized cells in the M phase is greater that of non synchronized cells. That corresponds to the findings of Pohl et al. (1981). Obtained results of measurement of cell electric activity are in good agreement with AFM findings.
Keywords:
bioelectric phenomena; cellular biophysics; modeling
Available at various institutes of the ASCR
Measurement and Computer Simulation of Electromagnetic Oscillations of Living Cells
Frohlich postulated coherent polar oscillations as a fundamental biophysical property of biological systems. Recently, Pelling et al. (2004, 2005) detected mechanical vibrations of yeast cell membrane ...
Microscopy of nanoparticles and films with nanoparticles
Kacerovský, Pavel; Žďánský, Karel; Procházková, Olga; Vaniš, Jan; Grym, Jan; Vasiliev, A.; Pašajev, E. M.
2009 - English
To study the electrophoreticaly deposited nanolayers of reverse micelles with Pd nano-particles on n-type InP substrates a wide range of current microscopic methods has been used. What concerns analytical methods the X-ray diffraction and mass spectrometry SIMS were used. The most relevant results about Pd nanoparticles in the layer were obtained by using HRTEM microscopy and SIMS spectrometry. In nanolayers crystallographic arrangement of Pd nanoparticles has not been found.
Keywords:
semiconductor devices; nanostructures
Available at various institutes of the ASCR
Microscopy of nanoparticles and films with nanoparticles
To study the electrophoreticaly deposited nanolayers of reverse micelles with Pd nano-particles on n-type InP substrates a wide range of current microscopic methods has been used. What concerns ...
Czech Acted Emotional Speech Database
Vondra, Martin; Vích, Robert; Horák, Petr
2009 - English
This paper describes the design, recording and evaluation of a Czech acted emotional speech database. The database contains 16 usual everyday sentences read by five professional speakers in six basic emotional styles and the neutral style.
Keywords:
Speech; Emotion; Listening test
Available at various institutes of the ASCR
Czech Acted Emotional Speech Database
This paper describes the design, recording and evaluation of a Czech acted emotional speech database. The database contains 16 usual everyday sentences read by five professional speakers in six basic ...
Calculation of the Electromagnetic Field Around Microtubule
Havelka, D.; Cifra, Michal
2009 - English
Microtubules are important structures in cytoskeleton which organizes the cell. Single microtubule is composed of electrically polar structures, tubulin heterodimers, which have strong electric dipole moment. Vibrations are expected to be generated in microtubules, thus tubulin heterodimers as electric dipoles are oscillating. This gives rise to electromagnetic field, which is detected around the cells. We calculate here the electromagnetic field of microtubules if they are excited at 1 GHz. This paper includes the work done in bachelor thesis of the first author.
Keywords:
bioelectric phenomena; microtubules; bioelectromagnetism
Available at various institutes of the ASCR
Calculation of the Electromagnetic Field Around Microtubule
Microtubules are important structures in cytoskeleton which organizes the cell. Single microtubule is composed of electrically polar structures, tubulin heterodimers, which have strong electric dipole ...
Respiratory and cardiovascular health effects of nanoparticles
Nohavica, Dušan
2009 - English
Numerous combustion related and natural sources generate airborne ultra fine particulate matter (<100 nm). Several epidemiological studies have found adverse respiratory and cardiovascular health effects in susceptible parts of the population to be associated with these particles. Published clinical studies with 10-50 μg/m3 ultra fine elemental carbon particles as surrogates for ambient particles did induce cardiovascular effects in healthy adults.
Keywords:
Nanotechnology; toxicity
Available at various institutes of the ASCR
Respiratory and cardiovascular health effects of nanoparticles
Numerous combustion related and natural sources generate airborne ultra fine particulate matter (...
Wide view of broadband in the CR
Kuchar, Anton
2009 - English
Situation in construction and operation of broadband acces networks in the Czech Republic is described from a broader perspective.
Keywords:
optical communication; Wireless communication; Cable television
Available at various institutes of the ASCR
Wide view of broadband in the CR
Situation in construction and operation of broadband acces networks in the Czech Republic is described from a broader perspective.
The role of small and medium CATV operators in providing e-services in the Czech Republic
Kuchar, Anton
2009 - English
As the demand for broadband e-services is increasing, there is a good chance for the cable TV operators to successfully compete with the traditional telecommunication operators in providing the services taking advantage of their broadband infrastructure. The paper reviews the Czech telecommunications arena focusing on the role of CATV operators and service providers in general and of the small and medium ones in particular.
Keywords:
Telecommunication networks; Optical communication; Cable television
Available at various institutes of the ASCR
The role of small and medium CATV operators in providing e-services in the Czech Republic
As the demand for broadband e-services is increasing, there is a good chance for the cable TV operators to successfully compete with the traditional telecommunication operators in providing the ...
The role of small and medium CATV operators in providing e-services in the Czech Republic
Kuchar, Anton; Klíma, P.
2009 - English
As the demand for broadband e-services is increasing, there is a good chance for the cable TV operators to successfully compete with the traditional telecommunication operators in providing the services taking advantage of their broadband infrastructure. The paper reviews the Czech telecommunications arena focusing on the role of CATV operators and service providers in general and of the small and medium ones in particular.
Keywords:
Telecommunication networks; Optical communication; Cable television
Available at various institutes of the ASCR
The role of small and medium CATV operators in providing e-services in the Czech Republic
As the demand for broadband e-services is increasing, there is a good chance for the cable TV operators to successfully compete with the traditional telecommunication operators in providing the ...
COMPARISON OF SPEECH VOCODERS BASED ON REAL AND COMPLEX CEPSTRAL COEFFICIENTS
Staněk, Jan; Vondra, Martin
2009 - English
New approach to speech analysis and synthesis using the complex cepstral coefficients was implemented in a form of a vocoder based on complex cepstral coefficients. To test the results of this new vocoder a comparison with results of an existing vocoder based on real cepstral coefficients were done. This paper describes the structure of both vocoders and the results of performed tests.
Keywords:
speech synthesis
Available at various institutes of the ASCR
COMPARISON OF SPEECH VOCODERS BASED ON REAL AND COMPLEX CEPSTRAL COEFFICIENTS
New approach to speech analysis and synthesis using the complex cepstral coefficients was implemented in a form of a vocoder based on complex cepstral coefficients. To test the results of this new ...
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