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Masses by gauge flavor dynamics [article]

Petr Benes, Jiri Hosek, Adam Smetana
2011 arXiv   pre-print
The * hosek@ujf.cas.cz basic idea, though not completely new [17] [18] [19] [20] [21] [22] [23] [24] , is to work with what we already have at disposal and gauge directly the flavor (family) index of  ... 
arXiv:1101.3456v2 fatcat:f4bi5qqtjnhgpf3ua4uftbwx3y

Comparison of Component Frameworks for Real-Time Embedded Systems [chapter]

Petr Hošek, Tomáš Pop, Tomáš Bureš, Petr Hnětynka, Michal Malohlava
2010 Lecture Notes in Computer Science  
The usage of components brings significant help in development of real-time embedded systems. There have been a number of component frameworks developed for this purpose and some of them have already become well-established in this area. However, although the component frameworks share basic concepts and the general approach, they substantially differ in the range of supported features and maturity. This makes relatively difficult to select the right component framework and thus poses a
more » ... ant obstacle in adoption of the component-based development for real-time embedded systems. To provide an overview, we present a survey in this paper, which illustrates distinguishing features of selected modern component-based frameworks for real-time embedded systems. The survey identifies features which are important for building systems from components in this area and compares these frameworks with respect to these features.
doi:10.1007/978-3-642-13238-4_2 fatcat:4b6yw6rksrd53cec5mudzwwgiq

Comparison of component frameworks for real-time embedded systems

Tomáš Pop, Petr Hnětynka, Petr Hošek, Michal Malohlava, Tomáš Bureš
2013 Knowledge and Information Systems  
The usage of components brings significant help in development of real-time embedded systems. There have been a number of component frameworks developed for this purpose and some of them have already become well-established in this area. However, although the component frameworks share basic concepts and the general approach, they substantially differ in the range of supported features and maturity. This makes relatively difficult to select the right component framework and thus poses a
more » ... ant obstacle in adoption of the component-based development for real-time embedded systems. To provide an overview, we present a survey in this paper, which illustrates distinguishing features of selected modern component-based frameworks for real-time embedded systems. The survey identifies features which are important for building systems from components in this area and compares these frameworks with respect to these features.
doi:10.1007/s10115-013-0627-9 fatcat:4kkale32enbjzec5dbkly2hqdm

Románský meč z Hoštic na Kroměřížsku

Petr Žákovský, Jiří Hošek, Patrick Bárta, Adam Fojtík, Miroslav Popelka
2020 Archaeologia historica  
Žákovský-Hošek-Sedláčková 2013, 260-261; Hošek-Košta-Žákovský 2019, 35-40) .  ...  Žákovský-Hošek-Sedláčková 2013, 260-261; Hošek-Košta-Žákovský 2019, 35-40) .  ... 
doi:10.5817/ah2020-1-17 fatcat:mf6kank4ofhijdqieomzuazcgq

Multi-version software updates

Cristian Cadar, Petr Hosek
2012 2012 4th International Workshop on Hot Topics in Software Upgrades (HotSWUp)  
Petr Hosek's doctoral studies are supported by a Google European PhD Fellowship.  ... 
doi:10.1109/hotswup.2012.6226615 dblp:conf/hotswup/CadarH12 fatcat:mapgi3ei6jeexkr5quuh74ucky

Auxin transport at cellular level: new insights supported by mathematical modelling

Petr Hošek, Martin Kubeš, Martina Laňková, Petre I. Dobrev, Petr Klíma, Milada Kohoutová, Jan Petrášek, Klára Hoyerová, Marcel Jiřina, Eva Zažímalová
2012 Journal of Experimental Botany  
doi:10.1093/jxb/ers074 pmid:22438304 pmcid:PMC3388834 fatcat:hoc62vi2x5ayljpgby5b5zstuu

Safe software updates via multi-version execution

Petr Hosek, Cristian Cadar
2013 2013 35th International Conference on Software Engineering (ICSE)  
ACKNOWLEDGMENTS Petr Hosek is a recipient of the Google Europe Fellowship in Software Engineering, and this research is supported in part by this Google Fellowship.  ... 
doi:10.1109/icse.2013.6606607 dblp:conf/icse/HosekC13 fatcat:w2edg26bsnfsjlexcbmafld3ke

Differential Subcellular Distribution of Cytokinins: How Does Membrane Transport Fit into the Big Picture?

Daniel Nedvěd, Petr Hošek, Petr Klíma, Klára Hoyerová
2021 International Journal of Molecular Sciences  
Cytokinins are a class of phytohormones, signalling molecules specific to plants. They act as regulators of diverse physiological processes in complex signalling pathways. It is necessary for plants to continuously regulate cytokinin distribution among different organs, tissues, cells, and compartments. Such regulatory mechanisms include cytokinin biosynthesis, metabolic conversions and degradation, as well as cytokinin membrane transport. In our review, we aim to provide a thorough picture of
more » ... he latter. We begin by summarizing cytokinin structures and physicochemical properties. Then, we revise the elementary thermodynamic and kinetic aspects of cytokinin membrane transport. Next, we review which membrane-bound carrier proteins and protein families recognize cytokinins as their substrates. Namely, we discuss the families of "equilibrative nucleoside transporters" and "purine permeases", which translocate diverse purine-related compounds, and proteins AtPUP14, AtABCG14, AtAZG1, and AtAZG2, which are specific to cytokinins. We also address long-distance cytokinin transport. Putting all these pieces together, we finally discuss cytokinin distribution as a net result of these processes, diverse in their physicochemical nature but acting together to promote plant fitness.
doi:10.3390/ijms22073428 pmid:33810428 fatcat:bjgrxm43izfflfmww2hyafw77i

Electroweak SU(2)_L × U(1)_Y model with strong spontaneously fermion-mass-generating gauge dynamics [article]

Petr Beneš, Jiří Hošek, Adam Smetana
2020 arXiv   pre-print
Higgs sector of the Standard model (SM) is replaced by quantum flavor dynamics (QFD), the gauged flavor SU(3)_f symmetry with scale Λ. Anomaly freedom requires addition of three ν_R. The approximate QFD Schwinger-Dyson equation for the Euclidean infrared fermion self-energies Σ_f(p^2) has the spontaneous-chiral-symmetry-breaking solutions ideal for seesaw: (1) Σ_f(p^2)=M_fR^2/p where three Majorana masses M_fR of ν_fR are of order Λ. (2) Σ_f(p^2)=m_f^2/p where three Dirac masses
more » ... λ_3+m_(8)λ_8 of SM fermions are exponentially suppressed w.r.t. Λ, and degenerate for all SM fermions in f. (1) M_fR break SU(3)_f symmetry completely; m_(3),m_(8) superimpose the tiny breaking to U(1) × U(1). All flavor gluons thus acquire self-consistently the masses ∼Λ. (2) All m_f break the electroweak SU(2)_L × U(1)_Y to U(1)_em. Symmetry partners of the composite Nambu-Goldstone bosons are the genuine Higgs particles: (1) Three ν_R-composed Higgses χ_i with masses ∼Λ. (2) Two new SM-fermion-composed Higgses h_3, h_8 with masses ∼ m_(3), m_(8), respectively. (3) The SM-like SM-fermion-composed Higgs h with mass ∼ m_(0), the effective Fermi scale. Σ_f(p^2)-dependent vertices in the electroweak Ward-Takahashi identities imply: The axial-vector ones give rise to the W and Z masses at Fermi scale. The polar-vector ones give rise to the fermion mass splitting in f. At the present exploratory stage the splitting comes out unrealistic.
arXiv:2011.03312v1 fatcat:fjj7e2q3avemtfezqthxyjdgca

Involvement of K+ATP and Ca2+ channels in hydrogen sulfide-suppressed ageing of porcine oocytes

Jan Nevoral, Tereza Zalmanova, Kristyna Hoskova, Miriam Stiavnicka, Petr Hosek, Ales Petelak, Jaroslav Petr
2018 Biological Research  
Hydrogen sulfide has been shown to improve the quality of oocytes destined for in vitro fertilization. Although hydrogen sulfide is capable of modulating ion channel activity in somatic cells, the role of hydrogen sulfide in gametes and embryos remains unknown. Our observations confirmed the hypothesis that the K ATP and L-type Ca 2+ ion channels play roles in porcine oocyte ageing and revealed a plausible contribution of hydrogen sulfide to the modulation of ion channel activity. Results: We
more » ... nfirmed the benefits of the activation and suppression of the K ATP and L-type Ca 2+ ion channels, respectively, for the preservation of oocyte quality. Conclusions: Our experiments identified hydrogen sulfide as promoting the desired ion channel activity, with the capacity to protect porcine oocytes against cell death. Further experiments are needed to determine the exact mechanism of hydrogen sulfide in gametes and embryos.
doi:10.1186/s40659-018-0187-2 fatcat:qf4hlpg6xzhpbbyl7x6s76djaa

Tomato (Solanum lycopersicum L.) SlIPT3 and SlIPT4 isopentenyltransferases mediate salt stress response in tomato

Eva Žižková, Petre I Dobrev, Yordan Muhovski, Petr Hošek, Klára Hoyerová, Daniel Haisel, Dagmar Procházková, Stanley Lutts, Václav Motyka, Imène Hichri
2015 BMC Plant Biology  
Cytokinins (CKs) are involved in response to various environmental cues, including salinity. It has been previously reported that enhancing CK contents improved salt stress tolerance in tomato. However, the underlying mechanisms of CK metabolism and signaling under salt stress conditions remain to be deciphered. Results: Two tomato isopentenyltransferases, SlIPT3 and SlIPT4, were characterized in tomato and Arabidopsis. Both proteins displayed isopentenyltransferase (IPT) activity in vitro,
more » ... e their encoding genes exhibited different spatio-temporal expression patterns during tomato plant development. SlIPT3 and SlIPT4 were affected by the endogenous CK status, tightly connected with CKs feedback regulation, as revealed by hormonal treatements. In response to salt stress, SlIPT3 and SlIPT4 were strongly repressed in tomato roots, and differently affected in young and old leaves. SlIPT3 overexpression in tomato resulted in high accumulation of different CK metabolites, following modifications of CK biosynthesis-, signaling-and degradation-gene expression. In addition, 35S::SlIPT3 tomato plants displayed improved tolerance to salinity consecutive to photosynthetic pigments and K + /Na + ratio retention. Involvement of SlIPT3 and SlIPT4 in salt stress response was also observed in Arabidopsis ipt3 knock-out complemented plants, through maintenance of CK homeostasis. Conclusions: SlIPT3 and SlIPT4 are functional IPTs encoded by differently expressed genes, distinctively taking part in the salinity response. The substantial participation of SlIPT3 in CK metabolism during salt stress has been determined in 35S::SlIPT3 tomato transformants, where enhancement of CKs accumulation significantly improved plant tolerance to salinity, underlining the importance of this phytohormone in stress response.
doi:10.1186/s12870-015-0415-7 pmid:25888402 pmcid:PMC4404076 fatcat:lpha5xz4i5hxhj452cdfjzzjy4

New Insights Into the Metabolism and Role of Cytokinin N-Glucosides in Plants

Klára Hoyerová, Petr Hošek
2020 Frontiers in Plant Science  
., 2008; Hošek et al., 2020; maize: Šmehilová et al., 2016) .  ...  to base No Wang et al., 2011; Šimura et al., 2018; Hošek et al., 2020 Conversion to base Yes Hošek et al., 2020 Localization Apoplast, vacuole, (chloroplast) Benková et al., 1999; Jiskrová  ... 
doi:10.3389/fpls.2020.00741 pmid:32582261 pmcid:PMC7292203 fatcat:gqobvlikkjagrki6ln47wsl23q

Inflammatory cell infiltrates, hypoxia, vascularization, pentraxin 3 and osteoprotegerin in abdominal aortic aneurysms – A quantitative histological study

Tereza Blassova, Zbynek Tonar, Petr Tomasek, Petr Hosek, Ivana Hollan, Vladislav Treska, Jiri Molacek, Helena Kuivaniemi
2019 PLoS ONE  
(XLS) Author Contributions Formal analysis: Petr Hosek. Investigation: Tereza Blassova, Zbynek Tonar, Vladislav Treska. Methodology: Tereza Blassova, Petr Tomasek. Supervision: Jiri Molacek.  ... 
doi:10.1371/journal.pone.0224818 pmid:31703088 pmcid:PMC6839860 fatcat:xtimqwcykvg4pmjpoynk3bwh6q

VARAN the Unbelievable

Petr Hosek, Cristian Cadar
2015 Proceedings of the Twentieth International Conference on Architectural Support for Programming Languages and Operating Systems - ASPLOS '15  
Petr is a recipient of a Google Europe Fellowship in Software Engineering, and Cristian of an Early-Career EPSRC Fellowship, and this research has been generously supported by these fellowships.  ... 
doi:10.1145/2694344.2694390 dblp:conf/asplos/HosekC15 fatcat:vukajy3btvcyflzhtnx3nt4ssu

Key problems of the quality of life of patients after total laryngectomy

David Slouka, Radek Kučera, Petr Hošek, Břetislav Gál, Ondřej Trčka, Tomáš Kostlivý, David Havel
2018 Kontakt  
Laryngeal cancer is the most frequent cancer in the head and neck area. Approximately one third of patients are treated by total laryngectomy (TL). The rate of the patient's adaptation to new conditions is crucial to the quality of his or her future life. Some patients survive tens of years after this operation. The preparation for TL is a complicated process that affects a patient's cooperation in postsurgical time. The patient is informed of the essence of the disease, treatment
more » ... the process of preoperative preparation, as well as the operation itself. Great emphasis is put on awareness of the postoperative development, the patient's good cooperation, as well as good prognosis of the disease. Losing one's voice and the cosmetic defects caused by the tracheostoma are a great problem for the patient. The aim of this study was to show the main problems that patients after total laryngectomy deal with in common life. Material: In the group, there were 102 patients who had been operated on between 2003 and 2013, 62 of which met the classification criteria. Methods: This prospective study was statistically evaluated. The frequencies of responses were processed in tables. Results: During the early postoperative period, the greatest problem of patients after total laryngectomy is their adaptation to new principles of breathing, which is subsequently followed by the adaptation to a new and different way of communication. The best option for the patient is to communicate using esophageal voice. Only 55% of operated patients use one of the verbal forms of alternative voice communication in their future lives.
doi:10.1016/j.kontakt.2018.08.006 fatcat:ydev3tspmjgldeyaq6j4u3su3u
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