Search results for "N3"
showing 10 items of 153 documents
Tsensuur kommunistlikus Poola Rahvavabariigis
2013
This article discusses the topic of censorship in the communist Poland. It presents a description of the functioning of the office of censorship (Main Office for the Control of Presentations and Public Performances; Główny Urzęd Kontroli Prasy, Publikacji i Widowisk) as well as other forms of informal influence on the authors working for public publishing houses. The underground publications suppressed during the Stalin era as well as difficulties encountered by Polish historians after 1956 will be the subject of the analysis. Furthermore, the article indicates the complementary role of the underground publishers after 1970. These publishing houses had a significant impact on the birth of p…
3D telpas modeļa veidošana no punkta mākoņiem
2021
Pasaulē, kas strauji kustās uz priekšu, 2D attēli ir pietiekami, lai dotu priekšstatu par notiekošo telpā, bet izveidojot 2D projekciju attēla formā no 3D pasaules, procesā tiek zaudēta telpiskā informācija. Savukārt, lai pilnībā aprakstītu telpā notiekošo un par to izdarītu secinājumus, nepieciešams šo informāciju iegūt atpakaļ. Bakalaura darba mērķis ir izpētīt kādas ir šī brīža industrijas metodes gan telpiskās informācijas iegūšanai, gan telpas rekonstrukcijai, analizēt iegūtos rezultātus, un izdarīt secinājumus. Darba ietvaros tika ievākta informācija par pieejamām metodēm, kas ļauj iegūt telpisko informāciju un metodēm, ko izmanto telpas rekonstrukcijai. Tika arī izveidota programmatū…
Unitary Groups Acting on Grassmannians Associated with a Quadratic Extension of Fields
2006
Let (V, H) be an anisotropic Hermitian space of finite dimension over the algebraic closure of a real closed field K. We determine the orbits of the group of isometries of (V, H) in the set of K-subspaces of V . Throughout the paper K denotes a real closed field and K its algebraic closure. Then it is well known (see, for example, [4, Chapter 2], [23]; see also [8]) that K = K(i) with i = √−1. Also we let (V,H) be an anisotropic Hermitian space (with respect to the involution underlying the quadratic field extension K/K) of finite dimension n over K. In this context we consider the natural action of the unitary group U = U(V,H) of isometries of (V,H) on the set Xd of all ddimensional K-subs…
Rank structured approximation method for quasi--periodic elliptic problems
2016
We consider an iteration method for solving an elliptic type boundary value problem $\mathcal{A} u=f$, where a positive definite operator $\mathcal{A}$ is generated by a quasi--periodic structure with rapidly changing coefficients (typical period is characterized by a small parameter $\epsilon$) . The method is based on using a simpler operator $\mathcal{A}_0$ (inversion of $\mathcal{A}_0$ is much simpler than inversion of $\mathcal{A}$), which can be viewed as a preconditioner for $\mathcal{A}$. We prove contraction of the iteration method and establish explicit estimates of the contraction factor $q$. Certainly the value of $q$ depends on the difference between $\mathcal{A}$ and $\mathcal…
Chlebem – słowem – bronią, czyli chłopscy bohaterowie zmagań o wolną Polskę. Janusz Gmitruk, "Ludowcy w walce o niepodległość", Warszawa: Muzeum Hist…
2020
Joan Robinson: «In memoriam»
1983
“A veces me he preguntado si me he quedado sola.” (J. R.) Ahora ya no hay duda de que la obsesión intelectual que persiguiera a J. Robinson a lo largo de su dilatada carrera no tiene más justificatión que la de ver agotarse —a destiempo, como siempre— las baterías de su propia soledad. A principios del mes de agosto moría esta brillante economista a quien todos los profesionales del gremio debemos, directa o indirectamente, alguna cosa (1).
Does one size fit all? The impact of cognitive skills on economic growth
2016
Les Documents de Travail de l'IREDU, n°2016-1; This paper tests for heterogeneous effects of cognitive skills on economic growth across countries. Using a new extended dataset on cognitive skills and controlling for potential endogeneity, we find that the magnitude of the effect is about 60 per cent higher for low-income countries compared to high-income countries, and it more than doubles when low TFP countries are compared to high TFP countries. There are also marked differences across geographic regions. Using data on the share of the population with advanced and minimum skill levels, our results also indicate that high-income countries should focus on increasing the number of high skill…
Trends Regarding the Evolution of the Romanian Pension System
2018
Abstract The pension system, together with the social assistance services form the social security system is recognized worldwide throughout the adoption of the Universal Declaration of Human Rights for the purpose of insured person compensation for damages regarding some inherent risks as: permanent or temporary inability of work, old age or unemployment. The main objectives of a pension system are decreasing poverty regarding the lower income persons throughout the conditions of limitation of the working capacity which are financially vulnerable. In this article we provide a qualitative and quantitative overview regarding the Romanian pension system structure and mechanism. The conclusion…
Worst case approach in convex minimization problems with uncertain data
2015
This paper concerns quantitative analysis of errors generated by incompletely known data in convex minimization problems. The problems are discussed in the mixed setting and the duality gap is used as the fundamental error measure. The influence of the indeterminate data is measured using the worst case scenario approach. The worst case error is decomposed into two computable quantities, which allows the quantitative comparison between errors resulting from the inaccuracy of the approximation and the data uncertainty. The proposed approach is demonstrated on a paradigm of a nonlinear reaction-diffusion problem together with numerical examples.