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207 results on '"Janoušek J"'

1. The mean stress influence on lifetime under high-cycle fatigue combined loading

Author

Balda M., Janoušek J., and Svoboda J.

Subjects
Fatigue, Combined loading, Mean stress, Mechanics of engineering. Applied mechanics, TA349-359
Abstract

This paper summarizes the results from the field of combined loading. This study builds on experiments that have been performed during the last ten years and provides information on sinusoidal in-phase stress components and tenseness distribution. Unfortunately, there is no exact method for estimating the damage caused by already known stress history. The main aim of experimental works was to determine the analytical form of Haigh diagrams and analytical expression of terminal lines equations. This article deals with different combinations of tension and torsion pre-stresses and contains results of experiments carried out in the laboratory of Institute of Thermomechanics in Pilsen. The lifetime curves (S-N curves) for combined pre-stress for different damage effect of normal and shear stress components have been obtained. The final results have been compiled and displayed at the threedimensional Haigh diagram with normalized coordinates. The terminal lines equations are solved by non-linear regression by Fletcher’s version of the Levenberg-Maquardt algorithm for the minimization of a sum of squares of equation residuals.

Published
2013

2. Squeezed light from a diamond-turned monolithic cavity

Author

Brieussel, A., Shen, Y., Campbell, G., Guccione, G., Janousek, J., Hage, B., Buchler, B. C., Treps, N., Fabre, C., Fang, F. Z., Li, X. Y., Symul, T., and Lam, P. K.

Subjects
Physics - Optics, Quantum Physics
Abstract

For some crystalline materials, a regime can be found where continuous ductile cutting is feasible. Using precision diamond turning, such materials can be cut into complex optical components with high surface quality and form accuracy. In this work we use diamond-turning to machine a monolithic, square-shaped, doubly-resonant $LiNbO_3$ cavity with two flat and two convex facets. When additional mild polishing is implemented, the Q-factor of the resonator is found to be limited only by the material absorption loss. We show how our monolithic square resonator may be operated as an optical parametric oscillator that is evanescently coupled to free-space beams via birefringent prisms. The prism arrangement allows for independent and large tuning of the fundamental and second harmonic coupling rates. We measure $2.6\pm0.5$ dB of vacuum squeezing at 1064 nm using our system. Potential improvements to obtain higher degrees of squeezing are discussed., Comment: 15 pages, 10 figures

Published
2016
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3. Worldwide forest surveys reveal forty-three new species in Phytophthora major Clade 2 with fundamental implications for the evolution and biogeography of the genus and global plant biosecurity

Author

Jung, T., primary, Milenković, I., additional, Balci, Y., additional, Janoušek, J., additional, Kudláček, T., additional, Nagy, Z.Á., additional, Baharuddin, B., additional, Bakonyi, J., additional, Broders, K.D., additional, Cacciola, S.O., additional, Chang, T.-T., additional, Chi, N.M., additional, Corcobado, T., additional, Cravador, A., additional, Đorđević, B., additional, Durán, A., additional, Ferreira, M., additional, Fu, C.-H., additional, Garcia, L., additional, Hieno, A., additional, Ho, H.-H., additional, Hong, C., additional, Junaid, M., additional, Kageyama, K., additional, Kuswinanti, T., additional, Maia, C., additional, Májek, T., additional, Masuya, H., additional, Magnano di San Lio, G., additional, Mendieta-Araica, B., additional, Nasri, N., additional, Oliveira, L.S.S., additional, Pane, A., additional, Pérez-Sierra, A., additional, Rosmana, A., additional, Sanfuentes von Stowasser, E., additional, Scanu, B., additional, Singh, R., additional, Stanivuković, Z., additional, Tarigan, M., additional, Thu, P.Q., additional, Tomić, Z., additional, Tomšovský, M., additional, Uematsu, S., additional, Webber, J.F., additional, Zheng, H.-C., additional, Zheng, F.-C., additional, Brasier, C.M., additional, and Horta Jung, M., additional

Published
2024
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4. Experimental Verification of Quantum Discord in Continuous-Variable States

Author

Hosseini, S., Rahimi-Keshari, S., Haw, J. Y., Assad, S. M., Chrzanowski, H. M., Janousek, J., Symul, T., Ralph, T. C., and Lam, P. K.

Subjects
Quantum Physics
Abstract

We introduce a simple and efficient technique to verify quantum discord in unknown Gaussian states and a certain class of non-Gaussian states. We show that any separation in the peaks of the marginal distributions of one subsystem conditioned on two different outcomes of homodyne measurements performed on the other subsystem indicates correlation between the corresponding quadratures, and hence nonzero discord. We also apply this method to non-Gaussian states that are prepared by overlapping a statistical mixture of coherent and vacuum states on a beam splitter. We experimentally demonstrate this technique by verifying nonzero quantum discord in a bipartite Gaussian and certain class of non-Gaussian states., Comment: 14 pages, 6 figures

Published
2013
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5. Demonstrating various quantum effects with two entangled laser beams

Author

Hage, B., Janoušek, J., Armstrong, S., Symul, T., Bernu, J., Chrzanowski, H. M., Lam, P. K., and Bachor, H. A.

Subjects
Quantum Physics
Abstract

We report on the preparation of entangled two mode squeezed states of yet unseen quality. Based on a measurement of the covariance matrix we found a violation of the Reid and Drummond EPR-criterion at a value of only 0.36\pm0.03 compared to the threshold of 1. Furthermore, quantum state tomography was used to extract a single photon Fock state solely based on homodyne detection, demonstrating the strong quantum features of this pair of laser-beams. The probability for a single photon in this ensemble measurement exceeded 2/3.

Published
2011
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6. Determining the Minimum Uncertainty State of Nonclassical Light

Author

Gabriel, C., Janousek, J., and Bachor, H. -A.

Subjects
Quantum Physics
Abstract

Squeezing experiments which are capable of creating a minimum uncertainty state during the nonlinear process, for example optical parametric amplification, are commonly used to produce light far below the quantum noise limit. This report presents a method with which one can characterize this minimum uncertainty state and gain valuable knowledge of the experimental setup.

Published
2009

7. Spatial multimode entanglement within one laser beam

Author

Janousek, J., Wagner, K., Morizur, J-F., Treps, N., Lam, P. K., Harb, C. C., and Bachor, H-A.

Subjects
Quantum Physics
Abstract

Optical entanglement is a key requirement for many quantum communication protocols. Conventionally entanglement is formed between two distinct beams, with the quantum correlations being measured at separate locations. We show entanglement between the modes within one beam. Our technique is particularly elegant and a major advance towards practical systems with minimum complexity. We demonstrate three major experimental achievements: (i) only one source is required to produce squeezed light in two orthogonal spatial modes, (ii) the entanglement is formed through lenses and beam rotation, without the need of a beam splitter and (iii) the quantum correlations are measured directly and simultaneously using a multi pixel, quadrant detector., Comment: 7 pages, 3 figures

Published
2008

8. Extensive morphological and behavioural diversity among fourteen new and seven described species in Phytophthora Clade 10 and its evolutionary implications

Author

Jung, T., Milenković, I., Corcobado, T., Májek, T., Janoušek, J., Kudláček, T., Tomšovský, M., Nagy, Z.Á., Durán, A., Tarigan, M., Sanfuentes von Stowasser, E., Singh, R., Ferreira, M., Webber, J. F., Scanu, B., Chi, N. M., Thu, P. Q., Junaid, M., Rosmana, A., Baharuddin, B., Kuswinanti, T., Nasri, N., Kageyama, K., Hieno, A., Masuya, H., Uematsu, S., Oliva, J., Redondo, M., Maia, Cristiana, Matsiakh, I., Kramarets, V., O'Hanlon, R., Tomić, Ž., Brasier, C. M., Horta Jung, M., and Naturalis journals & series

Subjects
Gondwana, Ecology, Evolution, Laurasia, phylogeny, allopatric, radiation, Biogeography, Behavior and Systematics, sympatric, oomycete, Allopatric, biogeography, Ecology, Evolution, Behavior and Systematics
Abstract

During extensive surveys of global Phytophthora diversity 14 new species detected in natural ecosystems in Chile, Indonesia, USA (Louisiana), Sweden, Ukraine and Vietnam were assigned to Phytophthora major Clade 10 based on a multigene phylogeny of nine nuclear and three mitochondrial gene regions. Clade 10 now comprises three subclades. Subclades 10a and 10b contain species with nonpapillate sporangia, a range of breeding systems and a mainly soil-and waterborne lifestyle. These include the previously described P. afrocarpa, P. gallica and P. intercalaris and eight of the new species: P. ludoviciana, P. procera, P. pseudogallica, P. scandinavica, P. subarctica, P. tenuimura, P. tonkinensis and P. ukrainensis. In contrast, all species in Subclade 10c have papillate sporangia and are self-fertile (or homothallic) with an aerial lifestyle including the known P. boehmeriae, P. gondwanensis, P. kernoviae and P. morindae and the new species P. celebensis, P. chilensis, P. javanensis, P. multiglobulosa, P. pseudochilensis and P. pseudokernoviae. All new Phytophthora species differed from each other and from related species by their unique combinations of morphological characters, breeding systems, cardinal temperatures and growth rates. The biogeography and evolutionary history of Clade 10 are discussed. We propose that the three subclades originated via the early divergence of pre-Gondwanan ancestors > 175 Mya into water-and soilborne and aerially dispersed lineages and subsequently underwent multiple allopatric and sympatric radiations during their global spread.

Published
2022

10. Extensive morphological and behavioural diversity among fourteen new and seven described species inPhytophthora Clade 10 and its evolutionary implications

Author

Jung, T., primary, Milenković, I., additional, Corcobado, T., additional, Májek, T., additional, Janoušek, J., additional, Kudláček, T., additional, Tomšovský, M., additional, Nagy, Z.Á., additional, Durán, A., additional, Tarigan, M., additional, Sanfuentes von Stowasser, E., additional, Singh, R., additional, Ferreira, M., additional, Webber, J.F., additional, Scanu, B., additional, Chi, N.M., additional, Thu, P.Q., additional, Junaid, M., additional, Rosmana, A., additional, Baharuddin, B., additional, Kuswinanti, T., additional, Nasri, N., additional, Kageyama, K., additional, Hieno, A., additional, Masuya, H., additional, Uematsu, S., additional, Oliva, J., additional, Redondo, M., additional, Maia, C., additional, Matsiakh, I., additional, Kramarets, V., additional, O'Hanlon, R., additional, Tomić, Ž., additional, Brasier, C.M., additional, and Horta Jung, M., additional

Published
2022
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13. Eight new Halophytophthora species from marine and brackish-water ecosystems in Portugal and an updated phylogeny for the genus

Author

Maia, C., Horta Jung, M., Carella, G., Milenković, I., Janoušek, J., Tomšovský, M., Mosca, S., Schena, L., Cravador, A., Moricca, S., Jung, T., Maia, C., Horta Jung, M., Carella, G., Milenković, I., Janoušek, J., Tomšovský, M., Mosca, S., Schena, L., Cravador, A., Moricca, S., and Jung, T.

Abstract

During an oomycete survey in December 2015, 10 previously unknown Halophytophthora taxa were isolated from marine and brackish water of tidal ponds and channels in saltmarshes, lagoon ecosystems and river estuaries at seven sites along the Algarve coast in the South of Portugal. Phylogenetic analyses of LSU and ITS datasets, comprising all described Halophytophthora species, the 10 new Halophytophthora taxa and all relevant and distinctive sequences available from GenBank, provided an updated phylogeny of the genus Halophytophthora s.str. showing for the first time a structure of 10 clades designated as Clades 1–10. Nine of the 10 new Halophytophthora taxa resided in Clade 6 together with H. polymorphica and H. vesicula. Based on differences in morphology and temperature-growth relations and a multigene (LSU, ITS, Btub, hsp90, rpl10, tigA, cox1, nadh1, rps10) phylogeny, eight new Halophytophthora taxa from Portugal are described here as H. brevisporangia, H. celeris, H. frigida, H. lateralis, H. lusitanica, H. macrosporangia, H. sinuata and H. thermoambigua. Three species, H. frigida, H. macrosporangia and H. sinuata, have a homothallic breeding system while the remaining five species are sterile. Pathogenicity and litter decomposition tests are underway to clarify their pathological and ecological role in the marine and brackish-water ecosystems. More oomycete surveys in yet undersurveyed regions of the world and population genetic or phylogenomic analyses of global populations are needed to clarify the origin of the new Halophytophthora species.

Published
2022
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14. Extensive morphological and behavioural diversity among fourteen new and seven described species in Phytophthora Clade 10 and its evolutionary implications

Author

Jung T., Milenković I., Corcobado T., Májek T., Janoušek J., Kudláček T., Tomšovský M., Nagy Z.Á., Durán A., Tarigan M., Sanfuentes von Stowasser E., Singh R., Ferreira M., Webber J.F., Scanu B., Chi N.M., Thu P.Q., Junaid M., Rosmana A., Baharuddin B., Kuswinanti T., Nasri N., Kageyama K., Hieno A., Masuya H., Uematsu S., Oliva J., Redondo M., Maia C., Matsiakh I., Kramarets V., O'Hanlon R., Tomić Ž., Brasier C.M., Horta Jung M., Jung T., Milenković I., Corcobado T., Májek T., Janoušek J., Kudláček T., Tomšovský M., Nagy Z.Á., Durán A., Tarigan M., Sanfuentes von Stowasser E., Singh R., Ferreira M., Webber J.F., Scanu B., Chi N.M., Thu P.Q., Junaid M., Rosmana A., Baharuddin B., Kuswinanti T., Nasri N., Kageyama K., Hieno A., Masuya H., Uematsu S., Oliva J., Redondo M., Maia C., Matsiakh I., Kramarets V., O'Hanlon R., Tomić Ž., Brasier C.M., and Horta Jung M.

Published
2022

26. Amaryllidaceae alkaloids from Hippeastrum X Hybridum CV. Ferrari, and preparation of vittatine derivatives as potential ligands for Alzheimer´s disease

Author

Al Shammari, L., primary, Hulcová, D., additional, Maříková, J., additional, Kučera, T., additional, Šafratová, M., additional, Nováková, L., additional, Schmidt, M., additional, Pulkrábková, L., additional, Janoušek, J., additional, Soukup, O., additional, Kuneš, J., additional, Opletal, L., additional, and Cahlíková, L., additional

Published
2021
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29. Pneumokoková infekční endokarditida nativní aortální chlopně u 5letého chlapce očkovaného pneumokokovou vakcínou.

Author

Jičínský, M., Jičínská, D., Materna, O., Koubský, K., Chaloupecký, V., Dřevínek, P., Janoušek, J., and Kubuš, P.

Subjects
STREPTOCOCCUS pneumoniae
Abstract

Copyright of Czecho-Slovak Pediatrics / Česko-Slovenská Pediatrie is the property of Czech Medical Association of JE Purkyne and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2021

34. Minimal Separating Sequences for All Pairs of States

Author

Smetsers, R., Moerman, J.S., Jansen, D.N., Dediu, A.-H., Janoušek, J., Martín-Vide, C., Truthe, B., Dediu, A.-H., Janoušek, J., Martín-Vide, C., and Truthe, B.

Subjects
Software Science
Abstract

Contains fulltext : 158117.pdf (Publisher’s version ) (Closed access)

Published
2016

35. Dědičné arytmické syndromy v dětském věku.

Author

Tavačová, T., Janoušek, J., and Krebsová, A.

Subjects
*PSYCHOLOGISTS, *ARRHYTHMIA, *GENETIC disorders, *CARDIOLOGISTS, *HISTORY of medicine
Abstract

Inherited arrhythmic syndromes, also known as cardiac channelopathies, are group of cardiac electrophysiological disorders characterized by a specific pattern on electrocardiogram and a disease specific risk for malignant ventricular arrhythmias. This group includes long QT syndrome (LQT), short QT syndrome (SQT), catecholaminerg polymorphic ventricular tachycardia (CPVT) and a sodium channelopathies (SCN5A) like Brugada syndrome, progressive cardiac conduction disease (PCCD) etc. Channelopathies manifest mostly in form of syncopes, epileptic seizures or sudden cardiac death. Most types of cardiac channelopathies are inherited in autosomal dominant pattern, autosomal recessive variants are rare and associated with a severe course of the disease. In some cases arrhythmic syndromes overlap arrhythmic cardiomyopathies, which are mainly caused by disorders in desmosomal proteins. The genetic stratification allows in many cases installation of individualized therapy and presymptomatic treatment of mutation carriers, who are at risk of malignant arrhythmias. The proper clinical diagnosis, genetic analysis and long-term treatment demand multidisciplinary approach and close cooperation among pediatric and adult cardiologists, geneticist, molecular geneticist, psychologists, sport and forensic medicine professionals. [ABSTRACT FROM AUTHOR]

Published
2020

40. Electrocardiographic Outcome of Resynchronization Therapy

Author

KITTNAR, O., primary, RIEDLBAUCHOVÁ, L., additional, TOMIS, J., additional, LOŽEK, M., additional, VALERIÁNOVÁ, A., additional, HRACHOVINA, M., additional, MLČEK, M., additional, HUPTYCH, M., additional, JANOUŠEK, J., additional, and LHOTSKÁ, L., additional

Published
2017
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44. Minimal Separating Sequences for All Pairs of States

Author

Dediu, A.-H., Janoušek, J., Martín-Vide, C., Truthe, B., Smetsers, R., Moerman, J.S., Jansen, D.N., Dediu, A.-H., Janoušek, J., Martín-Vide, C., Truthe, B., Smetsers, R., Moerman, J.S., and Jansen, D.N.

Abstract

Contains fulltext : 158117.pdf (publisher's version ) (Closed access)

Published
2016

46. Screening rizika náhlé srdeční smrti v dětském věku - mýtus nebo realita?

Author

Janoušek, J. and Kubuš, P.

Abstract

The potential for screening young individuals for increased risk of sudden cardiac death has been actively debated within the medical community, as well as in the public. Reports on sudden cardiac death published by the media and different views on the feasibility and rationality of screening are enriching and emotionalizing the debate. In the following article, evidence on the utility of electrocardiographic screening to detect conditions with increased risk of sudden cardiac death in the young is critically discussed. [ABSTRACT FROM AUTHOR]

Published
2018

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