MgB2 conductors for dc and ac applications

The paper presents discussion on up to date results on MgB2 conductors from the point of view of their future dc and ac applications. Basic physical parameters of MgB2 compound relevant to conductors are introduced. Different conductor preparation methods and conductor architectures are presented and attainable critical current densities discussed. Some numerical results on critical currents and ac losses of future multifilamentary MgB2 conductors with magnetic cladding of their filaments are given. Recently observed anomalous decrease of ac susceptibility at 50 K in copper clad Powder-in-tube, PIT, MgB2 wires is presented.Comment: Paper presented at EUCAS'01 conference, Copenhagen, 26-30 August 200

Comparison of the Information Technology Development in Slovakia and Hungary

Nowadays the role of information is increasingly important, so every company has to provide the efficient procurement, processing, storage and visualization of this special resource in hope to stay competitive. More and more enterprises introduce Enterprise Resource Planning System to be able to perform the listed functions. The article illustrates the usage of these systems in Hungary and Slovakia, as well as tests the following presumption: the level of Information Technology (IT) development is lower in Hungary than our northern neighbor

The Connection Between ICT Development Level and The Use of Information Systems by Micro-Enterprises

In the era of unstoppable IT development, the use of various information systems is an essential requirement for all enterprises. In particular, micro-enterprises are in a difficult position since they need continuous development to remain competitive with the possible help of information systems. At the same time, these enterprises that employ only a few people cannot afford to implement expensive software applications. Analysing the use of information systems among microenterprises is very important as they typically form the majority of enterprises, having a significant influence on the economic situation of each country. The present paper is aimed at analysing the use of information systems by micro-enterprises in Germany, Hungary and Slovakia

Spatial preferences of microRNA targets in 3' untranslated regions

<p>Abstract</p> <p>Background</p> <p>MicroRNAs are an important class of regulatory RNAs which repress animal genes by preferentially interacting with complementary sequence motifs in the 3' untranslated region (UTR) of target mRNAs. Computational methods have been developed which can successfully predict which microRNA may target which mRNA on a genome-wide scale.</p> <p>Results</p> <p>We address how predicted target sites may be affected by alternative polyadenylation events changing the 3'UTR sequence. We find that two thirds of targeted genes have alternative 3'UTRs, with 40% of predicted target sites located in alternative UTR segments. We propose three classes based on whether the target sites fall within constitutive and/or alternative UTR segments, and examine the spatial distribution of predicted targets in alternative UTRs. In particular, there is a strong preference for targets to be located in close vicinity of the stop codon and the polyadenylation sites.</p> <p>Conclusion</p> <p>The transcript diversity seen in non-coding regions, as well as the relative location of miRNA target sites defined by it, has a potentially large impact on gene regulation by miRNAs and should be taken into account when defining, predicting or validating miRNA targets.</p