Accurate Telescope Mount Positioning with MEMS Accelerometers

This paper describes the advantages and challenges of applying microelectromechanical accelerometer systems (MEMS accelerometers) in order to attain precise, accurate and stateless positioning of telescope mounts. This provides a completely independent method from other forms of electronic, optical, mechanical or magnetic feedback or real-time astrometry. Our goal is to reach the sub-arcminute range which is well smaller than the field-of-view of conventional imaging telescope systems. Here we present how this sub-arcminute accuracy can be achieved with very cheap MEMS sensors and we also detail how our procedures can be extended in order to attain even finer measurements. In addition, our paper discusses how can a complete system design be implemented in order to be a part of a telescope control system.Comment: Accepted for publication in PASP, 12 page

A hazai fejlesztéspolitika és térszervezés kapcsolódásának változása az európai uniós csatlakozás tükrében

There were two significant milestones in the lives of Central and Eastern European countries. One was the political, social and economic change of regime during which the former centralized system was demolished. The other was the accession to the European Union, which provided an opportunity for this macro region for convergence as well as a social, economic and regional cohesion in Europe. Both of them had a significant effect on the development policy of the countries, thus that of Hungary as well. The exclusivity of the top-down policy ceased. Nevertheless, due to the learning of democratic patterns, the lack of balance in political power and the lack of funds a kind of reflection period was characteristic of the development policy the result of which was a kind of mixture of top-down and bottom-up policy. By joining the European Union clear external rules and mechanisms of action came into effect. Significant funds became accessible that strengthened the centralization and the top-down approach in the Hungarian development policy. The regional dimensions of the development endeavours appeared in many different ways in our country, but finally the regional formations that were suitable for serving the top-down development policy strengthened. The individual areas were affected miscellaneously by the regional dimension of the development tendencies. While funds were provided by the European Union for them, the bottom-up initiatives were not sufficiently welcomed. Such an area is in many ways that of Lake Balaton, which is homogeneous as far as tourism is concerned but administratively, thus from the perspective of development policy, it is split. Due to the top-down approach as well as the strengthening of the bureaucratic development policy the role of this area in the development policy is fading. This can later have a negative effect on the valuable, unique character of the region

Kislányom

Landbruget i 1952

Cell Cycle Dependent Association of EBP50 with Protein Phosphatase 2A in Endothelial Cells

Ezrin-radixin-moesin (ERM)-binding phosphoprotein 50 (EBP50) is a phosphorylatable PDZ domain-containing adaptor protein that is abundantly expressed in epithelium but was not yet studied in the endothelium. We report unusual nuclear localization of EBP50 in bovine pulmonary artery endothelial cells (BPAEC). Immunofluorescent staining and cellular fractionation demonstrated that EBP50 is present in the nuclear and perinuclear region in interphase cells. In the prophase of mitosis EBP50 redistributes to the cytoplasmic region in a phosphorylation dependent manner and during mitosis EBP50 co-localizes with protein phosphatase 2A (PP2A). Furthermore, in vitro wound healing of BPAEC expressing phospho-mimic mutant of EBP50 was accelerated indicating that EBP50 is involved in the regulation of the cell division. Cell cycle dependent specific interactions were detected between EBP50 and the subunits of PP2A (A, C, and Bα) with immunoprecipitation and pull-down experiments. The interaction of EBP50 with the Bα containing form of PP2A suggests that this holoenzyme of PP2A can be responsible for the dephosphorylation of EBP50 in cytokinesis. Moreover, the results underline the significance of EBP50 in cell division via reversible phosphorylation of the protein with cyclin dependent kinase and PP2A in normal cells

Beszámoló az MTA Debreceni Területi Bizottsága (a DAB) 2016. évi munkájáról

K

Ösztönző szabályozás a villamosenergia-elosztásban

A természetes monopóliumként működő energetikai társaságok árszabályozását a legtöbb európai országban az ösztönző szabályozási módszerek határozzák meg. Ezeknek a módszereknek a megjelenése jelentős változást hozott a szabályozás közgazdaságtanába azzal, hogy az új megközelítések különös figyelmet fordítottak a szabályozott társaság motivációira és adottságnak vették a szabályozó hatóság információs hátrányát. A szerzők ebben a cikkben arra vállalkoztak, hogy áttekintsék az ösztönző szabályozás egyes elemeinek működését, a gyakorlatban is alkalmazott módszerek előnyeit és hátrányait a villamosenergia- elosztás példáján keresztül. Az ösztönző szabályozásra a cikk egy olyan elméleti keretet határoz meg, amely alapján az egyes országokban – akár hazánkban is – alkalmazott árszabályozási rendszerek értékelhetők és továbbfejleszthetők