Wielowymiarowe porównania systemów zdrowotnych w krajach OECD w kontekście realizowanych modeli ochrony zdrowia

Niniejszy tekst dotyczy zagadnień przekształceń systemów zdrowotnych w krajach rozwiniętych. Autor stawia pytanie czy wobec różnicowania się systemów zdrowotnych poprzez wzajemne zapożyczanie rozwiązań istnieje sens analizy systemów zdrowotnych poprzez odnoszenie się modeli ochrony zdrowia. Na podstawie przeprowadzonych analiz wykazał, że stosowane rozwiązania modelowe wywierają istotny statystycznie wpływ na kształtowanie się charakterystyk ochrony zdrowia. Jednocześnie eksponowanie podejścia modelowego wraz z koncentracją wyłącznie na kwestiach ekonomicznych powinno zostać uznane za zbyt wąskie i nie oddające istoty zróżnicowania systemów zdrowotnych. Niezbędne jest całościowe podejście, uwzględniające różne elementy systemu ochrony zdrowia w szczególności: mechanizmów alokacji oraz rozwiązań organizacyjnych i instytucjonalnych.Paweł Białynicki-Birul

Motivic DT-invariants for the one loop quiver with potential

In this paper we compute the motivic Donaldson--Thomas invariants for the quiver with one loop and any potential. As the presence of arbitrary potentials requires the full machinery of \hat(\mu)-equivariant motives, we give a detailed account of them. In particular, we will prove two results for the motivic vanishing cycle which might be of importance not only in Donaldson--Thomas theory.Comment: 30 page

Roots of the affine Cremona group

Let k[x_1,...,x_n] be the polynomial algebra in n variables and let A^n=Spec k[x_1,...,x_n]. In this note we show that the root vectors of the affine Cremona group Aut(A^n) with respect to the diagonal torus are exactly the locally nilpotent derivations x^a\times d/dx_i, where x^a is any monomial not depending on x_i. This answers a question due to Popov.Comment: 4 page

Phase space localization of antisymmetric functions

Upper and lower bounds are written down for the minimum information entropy in phase space of an antisymmetric wave function in any number of dimensions. Similar bounds are given when the wave function is restricted to belong to any of the proper subspaces of the Fourier transform operator.Comment: 5 pages, REVTEX, no figure

Quantum effects in the evolution of vortices in the electromagnetic field

We analyze the influence of electron-positron pairs creation on the motion of vortex lines in electromagnetic field. In our approach the electric and magnetic fields satisfy nonlinear equations derived from the Euler-Heisenberg effective Lagrangian. We show that these nonlinearities may change the evolution of vortices.Comment: REVTEX4 and 5 EPS figure

On motivic decompositions arising from the method of Bialynicki-Birula

Recently, V. Chernousov, S. Gille and A. Merkurjev have obtained a decomposition of the motive of an isotropic smooth projective homogeneous variety analogous to the Bruhat decomposition. Using the method of Bialynicki-Birula, I generalize this decomposition to the case of a (possibly anisotropic) smooth projective variety homogeneous under the action of an isotropic reductive group. This answers a question of N. Karpenko.Comment: Vastly improved with (1) references to important previous work on the subject by S. del Bano, (2) an explicit combinatorial description of the decomposition of projective homogeneous varieties in terms of reflection groups and (3) an illustrative exampl

Point Charge in the Born-Infeld Electrodynamics

We show that the nonlinear Born-Infeld field equations supplemented by the "dynamical condition" (certain boundary condition for the field along the particle's trajectory) define perfectly deterministic theory, i.e. particle's trajectory is determined without any equations of motion. It is a first step towards constructing the consistent theory of point particles interacting with nonlinear electromagnetism.Comment: 11 pages, LATE

Nambu-Type Generalization of the Dirac Equation

Nonlinear generalization of the Dirac equation extending the standard paradigm of nonlinear Hamiltonians is discussed. ``Faster-than-light telegraphs" are absent for all theories formulated within the new framework. A new metric for infinite dimensional Lie algebras associated with Lie-Poisson dynamics is introduced.Comment: revtex, 19 page

Structure of nonlinear gauge transformations

Nonlinear Doebner-Goldin [Phys. Rev. A 54, 3764 (1996)] gauge transformations (NGT) defined in terms of a wave function $\psi(x)$ do not form a group. To get a group property one has to consider transformations that act differently on different branches of the complex argument function and the knowledge of the value of $\psi(x)$ is not sufficient for a well defined NGT. NGT that are well defined in terms of $\psi(x)$ form a semigroup parametrized by a real number $\gamma$ and a nonzero $\lambda$ which is either an integer or $-1\leq \lambda\leq 1$. An extension of NGT to projectors and general density matrices leads to NGT with complex $\gamma$. Both linearity of evolution and Hermiticity of density matrices are gauge dependent properties.Comment: Final version, to be published in Phys.Rev.A (Rapid Communication), April 199

Generation and control of resonance states in crossed magnetic and electric fields

A two-dimensional electron system interacting with an impurity and placed in crossed magnetic and electric fields is under investigation. Since it is assumed that an impurity center interacts as an attractive $\delta$-like potential a renormalization procedure for the retarded Green's function has to be carried out. For the vanishing electric field we obtain a close analytical expression for the Green's function and we find one bound state localized between Landau levels. It is also shown by numerical investigations that switching on the electric field new long-living resonance states localized in the vicinity of Landau levels can be generated.Comment: 6 pages, 6 figures, 1 tabl