Government Funding for the Arts (2019-2020)

In this example of an argument, Kravchenko makes the case for the need for continued funding for arts education. He points out the benefits of a funded arts education as increasing creativity, child development, and future career opportunities.https://digitalcommons.cortland.edu/rhetdragonsargument/1002/thumbnail.jp

Services for Satellite Data Processing

Data processing services for Meteosat geostationary satellite are presented. Implemented services correspond to the different levels of remote-sensing data processing, including noise reduction at preprocessing level, cloud mask extraction at low-level and fractal dimension estimation at high-level. Cloud mask obtained as a result of Markovian segmentation of infrared data. To overcome high computation complexity of Markovian segmentation parallel algorithm is developed. Fractal dimension of Meteosat data estimated using fractional Brownian motion models

Diassociative algebras and Milnor's invariants for tangles

We extend Milnor's mu-invariants of link homotopy to ordered (classical or virtual) tangles. Simple combinatorial formulas for mu-invariants are given in terms of counting trees in Gauss diagrams. Invariance under Reidemeister moves corresponds to axioms of Loday's diassociative algebra. The relation of tangles to diassociative algebras is formulated in terms of a morphism of corresponding operads.Comment: 17 pages, many figures; v2: several typos correcte

Navier-Stokes equations, determining forms, determining modes, inertial manifolds, dissipative dynamical systems

The determining modes for the two-dimensional incompressible Navier-Stokes equations (NSE) are shown to satisfy an ordinary differential equation of the form $dv/dt=F(v)$, in the Banach space, $X$, of all bounded continuous functions of the variable $s\in\mathbb{R}$ with values in certain finite-dimensional linear space. This new evolution ODE, named {\it determining form}, induces an infinite-dimensional dynamical system in the space $X$ which is noteworthy for two reasons. One is that $F$ is globally Lipschitz from $X$ into itself. The other is that the long-term dynamics of the determining form contains that of the NSE; the traveling wave solutions of the determining form, i.e., those of the form $v(t,s)=v_0(t+s)$, correspond exactly to initial data $v_0$ that are projections of solutions of the global attractor of the NSE onto the determining modes. The determining form is also shown to be dissipative; an estimate for the radius of an absorbing ball is derived in terms of the number of determining modes and the Grashof number (a dimensionless physical parameter). Finally, a unified approach is outlined for an ODE satisfied by a variety of other determining parameters such as nodal values, finite volumes, and finite elements

Parasitoid complex (Hymenoptera: Eulophidae) of the leaf-mining fly Chromatomyia horticola (Goureau) (Diptera: Agromyzidae) in Russia

Yefremova Z, Strakhova I, Kravchenko V, von Tschirnhaus M, Yegorenkova E. Parasitoid complex (Hymenoptera: Eulophidae) of the leaf-mining fly Chromatomyia horticola (Goureau) (Diptera: Agromyzidae) in Russia. PHYTOPARASITICA. 2015;43(1):125-134.Sixteen species of Eulophidae were reared from Chromatomyia horticola (Goureau) collected from 14 host plants in the Middle Volga Basin (Russia). Chrysocharis viridis (Nees), Closterocerus trifasciatus Westwood, Diglyphus pusztensis (Erdos), Minotetrastichus frontalis (Nees), Neochrysocharis aratus (Walker), Pediobius cassidae Erdos, and Pnigalio pectinicornis (Linnaeus) are new host records. Two parasitic species, D. isaea (Walker) and P. metallicus (Nees), were dominant. The pre-imaginal stages of both dominant (ecto- and endoparasitoid) species are illustrated. The sex ratio between the ecto- and endoparasitoids differed. In June/July, there were about threefold more females in ectoparasitoids than in endoparasitoids. These differences in sex ratio were not related to the plant species only. The endoparasitoid species were found on all species of host plants of C. horticola, whereas the ectoparasitoid species were restricted to about half the plant species. Diglyphus isaea and Pediobius metallicus are very important regulating species against leaf miner pests such as C. horticola

Transport in disordered interacting systems: Numerical results for one-dimensional spinless electrons

The combined influence of disorder and interactions on the transport properties of electrons in one dimension is investigated. The numerical simulations are carried out by means of the Hartree-Fock-based diagonalization (HFD), a very efficient method to determine the low-energy properties of a disordered many-particle system. We find that the conductance of a strongly localized system can become considerably enhanced by the interactions. The enhancement for long-range interactions is significantly larger than for short-range interactions. In contrast, the conductance of weakly localized systems becomes suppressed by the interactions.Comment: Invited talk presented at Percolation 98, submitted to Physica A, 8 pages, elsart style, 4 eps figures include

Fock space localization, return probability, and conductance of disordered interacting electrons

We numerically simulate the low-energy properties of interacting electrons in a random potential using the Hartree-Fock based exact diagonalization method. In particular, we investigate how the transport properties are influenced by the combined effects of disorder and correlations in the presence of the electron spin. To this end we calculate the participation number of many-particle states in Fock space, the return probability of single-particle excitations, and the Kubo-Greenwood conductance. It turns out that in the strongly localized regime interactions increase the conductance whereas for weak disorder interactions decrease the conductance. In contrast, single-particle excitations in general experience a localizing influence of the interactions.Comment: 4 pages, 4 eps figures, Proc. of the Symposium on Wave Propagation and Electronic Structure in Disordered Systems, FORTH, Heraklion, Crete, Greece (June 2000