Search results for "Arm"
showing 10 items of 19046 documents
Effect of Germacrene-Rich Essential Oil of Parentucellia latifolia (L.) Caruel Collected in Central Sicily on the Growth of Microorganisms Inhabiting…
2022
In the present study, the chemical composition of the essential oil from aerial parts of Parentucellia latifolia (L.) Caruel collected in Central Sicily was analyzed by gas chromatography and gas chromatography–mass spectrometry. The results showed the presence of sesquiterpene hydrocarbons, with germacrene D and germacrene B accounting, respectively, for 59.2% and 24.3% of the total oil. Different colonies of bacteria and fungi frequently affect cellulosic objects such as books stored in libraries and museums. The antibacterial and antifungal activity against some microorganisms infesting historical-artistic craftsmanship was determined, demonstrating that the essential oil was particular…
Medikamenta Tamiflu nozīmēšanas principi Latvijā
2018
Katru gadu gripa skar lielu skaitu pasaules iedzīvotāju. Ar gripu var saslimt jebkuras vecuma grupas cilvēks. Gripas epidēmija negatīvi ietekmē valsts ekonomisko izaugsmi, samazinot iedzīvotāju darbaspēju un darba ražīgumu. Savukārt gripas izraisītas komplikācijas var radīt invaliditāti vai pat apdraudēt dzīvību. Oseltamivīrs (Tamiflu medikaments) ir pretvīrusa zāles, kas palīdz mazināt gripas vīrusa izplatību organismā un mazina komplikāciju rašanās iespējamību. Darba mērķis ir noskaidrot, kādi ir nozīmēšanas principi Tamiflu medikamentam, kā arī pacientu un veselības aprūpes speciālistu viedokli par tā lietošanu gripas laikā. Maģistra darbā ir aprakstīti gripas tipi, kā arī ir analizēta u…
Biharmonic obstacle problem: guaranteed and computable error bounds for approximate solutions
2020
The paper is concerned with a free boundary problem generated by the biharmonic operator and an obstacle. The main goal is to deduce a fully guaranteed upper bound of the difference between the exact minimizer u and any function (approximation) from the corresponding energy class (which consists of the functions in $H^2$ satisfying the prescribed boundary conditions and the restrictions stipulated by the obstacle). For this purpose we use the duality method of the calculus of variations and general type error identities earlier derived for a wide class of convex variational problems. By this method, we define a combined primal--dual measure of error. It contains four terms of different natu…
The linearized Calderón problem for polyharmonic operators
2023
In this article we consider a linearized Calderón problem for polyharmonic operators of order 2m (m ≥ 2) in the spirit of Calderón’s original work [7]. We give a uniqueness result for determining coefficients of order ≤ 2m − 1 up to gauge, based on inverting momentum ray transforms. peerReviewed
The Hajłasz Capacity Density Condition is Self-improving
2022
We prove a self-improvement property of a capacity density condition for a nonlocal Hajlasz gradient in complete geodesic spaces with a doubling measure. The proof relates the capacity density condition with boundary Poincare inequalities, adapts Keith-Zhong techniques for establishing local Hardy inequalities and applies Koskela-Zhong arguments for proving self-improvement properties of local Hardy inequalities. This leads to a characterization of the Hajlasz capacity density condition in terms of a strict upper bound on the upper Assouad codimension of the underlying set, which shows the self-improvement property of the Hajlasz capacity density condition. Open Access funding provided than…
Gradient walks and $p$-harmonic functions
2017
On a numerical solution of the Maxwell equations by discrete exterior calculus
2014
p-Laplacen operaattorin ominaisarvo-ongelmasta
2016
Tämän tutkielman tarkoitus on tutustua epälineaarisiin ominaisarvo-ongelmiin p-Laplacen operaattorin ominaisarvo-ongelman kautta. p-Laplacen operaattori on Laplacen operaattorin eräs yleistys ja tarkastelun kohteena oleva ominaisarvo-ongelma on Dirichletin ominaisarvo-ongelman yleistys. Tutkielmassa kerrataan ensin tarvittavia taustatietoja Sobolevin avaruuksista ja funktionaalianalyysistä, ja keskitytään sitten itse ongelmaan. Päätulokset koskevat ensimmäistä ominaisarvoa, ja ne ovat ensimmäisen ominaisarvon olemassaolo, ensimmäisen ominaisarvon karakterisointi Rayleighin osamäärän avulla, ensimmäisen ominaisfunktion yksinkertaisuus, ja se, että ensimmäinen ominaisfunktio on ainoa ominaisf…
Spectral multipliers and wave equation for sub-Laplacians: lower regularity bounds of Euclidean type
2018
Let $\mathscr{L}$ be a smooth second-order real differential operator in divergence form on a manifold of dimension $n$. Under a bracket-generating condition, we show that the ranges of validity of spectral multiplier estimates of Mihlin--H\"ormander type and wave propagator estimates of Miyachi--Peral type for $\mathscr{L}$ cannot be wider than the corresponding ranges for the Laplace operator on $\mathbb{R}^n$. The result applies to all sub-Laplacians on Carnot groups and more general sub-Riemannian manifolds, without restrictions on the step. The proof hinges on a Fourier integral representation for the wave propagator associated with $\mathscr{L}$ and nondegeneracy properties of the sub…
Uz hidroksiapatīta materiāliem audzētu cilvēka kaulu smazdzeņu mezenhimālo šūnu raksturošana
2020
Maģistra darba mērķis bija veikt cilvēka kaula smadzeņu mezenhimālās cilmes šūnu augšanu uz dažādu veidu hidroksiapatīta materiāliem un noteikt šūnu morfoloģiskās īpašības uz tiem. Lai sasniegtu izvirzīto mērķi, izmantojām šūnu iekrāsošanas metodes ar dažādām krāsvielām (faloidīnu, hoechst, Ki-67) un mikroskopā vērojām, kā šūnas uzvedas uz HA pārklājumiem. Morfoloģiskie dati tika analizēti ar NIS-elements un ImageJ programmām. Rezultāti parādīja, ka KS-MCŠ morfoloģija var ievērojami atšķirties audzētām uz dažādiem HA pārklājumiem.