Sampling and interpolation in the Paley-Wiener spaces Lp π, 0 < p ≤ 1

Following Beurling's ideas concerning sampling and interpolation in the Paley-Wiener space L∞τ , we find necessary and sufficient density conditions for sets of sampling and interpolation in the Paley-Wiener spaces Lp τ for 0 < p ≤ 1

Wavelets on Discrete Fields

International audienceAn arithmetic version of continuous wavelet analysis is described. Starting from a square-integrable representation of the affine group of Z Z p (or Z Z) it is shown how wavelet decom-positions of ℓ 2 (Z Z p) can be obtained. Moreover, a redefinition of the dilation operator on ℓ 2 (Z Z p) directly yields an algorithmic structure similar to that appearing with multiresolution analyses

Visuospatial bootstrapping: spatialized displays enhance digit and nonword sequence learning

Visuospatial bootstrapping describes the observation that performance on a verbal memory task is enhanced by presenting the to‐be‐remembered material in a format with additional embedded spatial information. Thus far, it has only been reported in short‐term memory tasks. Here, we report two experiments assessing the impact of spatial information on the learning of sequences in long‐term memory. Experiment 1 used digits presented within a familiar numeric keypad as stimuli compared against single digits presented in one location. Experiment 2 used novel nonwords, which were either presented in an unchanging arrangement permitting the building‐up of location knowledge or in a constantly changing arrangement. Both experiments demonstrated strong evidence that reliable spatial information facilitated sequence learning, particularly in later sequence positions. It is concluded that the incidental availability of spatialized information during study can facilitate learning of sequences of digits and nonwords. Furthermore, the spatial information can be learned during the task itself and does not need to be preexistent in long‐term knowledge

How do whitefish exporters adapt to increased pressure for sustainable transportation of fish to the EU market?

Master of Science in Business (Siviløkonom) - Nord universitet 202

Numerical Analysis of the Non-uniform Sampling Problem

We give an overview of recent developments in the problem of reconstructing a band-limited signal from non-uniform sampling from a numerical analysis view point. It is shown that the appropriate design of the finite-dimensional model plays a key role in the numerical solution of the non-uniform sampling problem. In the one approach (often proposed in the literature) the finite-dimensional model leads to an ill-posed problem even in very simple situations. The other approach that we consider leads to a well-posed problem that preserves important structural properties of the original infinite-dimensional problem and gives rise to efficient numerical algorithms. Furthermore a fast multilevel algorithm is presented that can reconstruct signals of unknown bandwidth from noisy non-uniformly spaced samples. We also discuss the design of efficient regularization methods for ill-conditioned reconstruction problems. Numerical examples from spectroscopy and exploration geophysics demonstrate the performance of the proposed methods

Implementation of the EU CCS Directive in Europe: results and development in 2013

Directive 2009/31/EC of the European Parliament on the geological storage of carbon dioxide, entered into force on June 25th 2009. By the end 2013 the CCS Directive has been fully transposed into national law to the satisfaction of the EC in 20 out of 28 EU Member States, while six EU countries (Austria, Cyprus, Hungary, Ireland, Sweden and Slovenia) had to complete transposing measures. In July 2014 the European Commission closed infringement procedures against Cyprus, Hungary and Ireland, which have notified the EC that they have taken measures to incorporate the CCS Directive into national law. Among other three countries Sweden has updated its legislation and published a new law in their country in March 2014, permitting CO2 storage offshore. The evaluation of the national laws in Poland, which were accepted at national level in November 2013, and Croatia, which entered the EU on 7 July 2013 and simultaneously transposed the CCS directive, is still ongoing in 2014. The first storage permit under the Directive (for the ROAD Project in the offshore Netherlands) has been approved by the EC. While CO2 storage is permitted in a number of European countries, temporary restrictions were applied in Czech Republic, Denmark and Poland. CO2 storage is prohibited except for research and development in Estonia, Finland, Luxembourg, two regions in Belgium and Slovenia due to their geological conditions, but also forbidden in Austraia, Ireland and Latvia. The size of exploration areas for CO2 storage sites is limited in Bulgaria and Hungary. In Germany, only limited CO2 storage will be permitted until 2018 (up to 4 Mt CO2 annually)

The complete inventory of receptors encoded by the rat natural killer cell gene complex

The natural killer cell gene complex (NKC) encodes receptors belonging to the C-type lectin superfamily expressed primarily by NK cells and other leukocytes. In the rat, the chromosomal region that starts with the Nkrp1a locus and ends with the Ly49i8 locus is predicted to contain 67 group V C-type lectin superfamily genes, making it one of the largest congregation of paralogous genes in vertebrates. Based on physical proximity and phylogenetic relationships between these genes, the rat NKC can be divided into four major parts. We have previously reported the cDNA cloning of the majority of the genes belonging to the centromeric Nkrp1/Clr cluster and the two telomeric groups, the Klre1–Klri2 and the Ly49 clusters. Here, we close the gap between the Nkrp1/Clr and the Klre1–Klri2 clusters by presenting the cDNA cloning and transcription patterns of eight genes spanning from Cd69 to Dectin1, including the novel Clec2m gene. The definition, organization, and evolution of the rat NKC are discussed

Paired opposing leukocyte receptors recognizing rapidly evolving ligands are subject to homogenization of their ligand binding domains

Some leukocyte receptors come in groups of two or more where the partners share ligand(s) but transmit opposite signals. Some of the ligands, such as MHC class I, are fast evolving, raising the problem of how paired opposing receptors manage to change in step with respect to ligand binding properties and at the same time conserve opposite signaling functions. An example is the KLRC (NKG2) family, where opposing variants have been conserved in both rodents and primates. Phylogenetic analyses of the KLRC receptors within and between the two orders show that the opposing partners have been subject to post-speciation gene homogenization restricted mainly to the parts of the genes that encode the ligand binding domains. Concerted evolution similarly restricted is demonstrated also for the KLRI, KLRB (NKR-P1), KLRA (Ly49), and PIR receptor families. We propose the term merohomogenization for this phenomenon and discuss its significance for the evolution of immune receptors

The Dectin-2 family of C-type lectin-like receptors : an update

Peer reviewedPublisher PD