The presented catalogue contains a list of all chromospheric flares of importance 2+, 3, and 3+, observed during the years 1859-1956, together with ionospheric disturbances, geomagnetic storms and aurorae possibly connected with them. All papers discussing problems connected with these flares and their geophysical consequences are summarized in the index of literature.
The catalogue of the heliocentric orbits of 817 meteors recorded within the double station program of the video observation of meteors ar the Ondřejov observatory in years 1998-2001 is presented. The electronic version of the catalogue is available on http://www.asu.cas.cz/-meteor/catalogues. and Součástí článku jsou tabulky na str. 4-32.
The latest research reveals that nitric oxide as a gas messenger may diffuse into the surrounding extracellular fluid and act locally upon neighboring target cells. However, several observations raise the possibility that nitric oxide may also be released at a greater distance from the neuronal cell body. The catalytic nitric oxide synthase (cNOS) activity was therefore studied in the cervicothoracic and lumbosacral segments of the spinal cord of rabbits, including the white matter of dorsal columns (DC), lateral columns (LC) and ventral columns (VC), as well as the gray matter of dorsal horns (DH), intermediate zone (IZ) and ventral horns (VH). Lower cNOS activity was found in the white matter of both cervicothoracic (47 %) and lumbosacral (30 %) regions, whereas that detected in the gray matter of the lumbosacral part of the spinal cord was considerably higher (70 %). Enzyme activity varied from 43.4 to 77.2 dpm/µg protein in the cervicothoracic segments of the gray matter in the descending order: DH>VH>IZ. Similar cNOS activity was found in the white matter of the cervicothoracic segments (42.1-62.8 dpm/µg protein). When the activity of cNOS was compared in the lumbosacral segments, the highest enzyme activity was found in DH of the gray matter (198.7 dpm/µg protein) and the lowest cNOS in DC (45.8 dpm/µg protein) of the white matter. It was concluded that the white matter of the spinal cord contains similar cNOS activity in comparison to the gray matter., N. Lukáčová, J. Pavel., and Obsahuje bibliografii
The purpose of this paper is to better understand what ontologists are doing when they ask questions about the categories of the world. I will take Cumpa’s attempts to find out the fundamental structure of the world as a case-study. In one of his latest paper (Cumpa 2014), he conceives the classical ontological question about the existence of the fundamental categories of the world (what are the fundamental categories of the world?) as a question about the category able to unify the two Sellarsian images of the world: the manifest and scientific images, considered as two different languages. According to him, the only category with such an explanatory power is the category of ‘facts’ (or ‘state of affairs’): the fundamental cate-gory of what he calls ‘the metaphysical language.’ I will argue that if Cumpa takes the latter to be a broader language or framework, in Carnap’s terms, common to both the ordinary and the scientific ones, then his proposal turns out to be rather problematic (as they are ultimately ‘incommensurable’). On the other hand, if he understands it as external to both of them, then his solution ends up being mean-ingless and devoid of any cognitive content, with at best a practical character and/or an expressive function.
Non-surgical management of aortic valve disease has been given considerable attention. Several recent publications have already reported its use in clinical practice. The main issue is to get an understanding of the pathophysiological processes and, most importantly, extensive experimental activity. In addition to testing various animal models, technical and material aspects are also being intensively investigated. It is not clear yet whether the durability and applicability of this promising development will be comparable with the standard of current cardiac surgery. Nonetheless, even the use of some models as a temporary approach helping to improve the circulatory status, not allowing safe surgery, is certainly justified. At any rate, a new stage of research and clinical application has been set off. However, experimental background continues to be simply indispensable. The paper is a short review of the issue., J. Šochman, J. H. Peregrin., and Obsahuje bibliografii a bibliografické odkazy
This paper gives the local existence of mild solutions to the Cauchy problem for the complex Ginzburg-Landau type equation ∂u ∂t − (λ + iα)∆u + (κ + iβ)|u| q−1 u − γu = 0 in R N × (0, ∞) with L p -initial data u0 in the subcritical case (1 6 q < 1 + 2p/N), where u is a complex-valued unknown function, α, β, γ, κ ∈ R, λ > 0, p > 1, i = √ −1 and N ∈ N. The proof is based on the L p -L q estimates of the linear semigroup {exp(t(λ + iα)∆)} and usual fixed-point argument.
Global solvability and asymptotics of semilinear parabolic Cauchy problems in $\mathbb R^n$ are considered. Following the approach of A. Mielke [15] these problems are investigated in weighted Sobolev spaces. The paper provides also a theory of second order elliptic operators in such spaces considered over $\mathbb R^n$, $n\in \mathbb N$. In particular, the generation of analytic semigroups and the embeddings for the domains of fractional powers of elliptic operators are discussed.