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

Beszámoló a X. Pedagógiai Értékelési Konferenciáról

A Szegedi Tudományegyetem Neveléstudományi Intézete és Neveléstudományi Doktori Iskolája szervezésében 2012. április 26-28-án rendezték meg a X. Pedagógiai Értékelési Konferenciát (továbbiakban: PÉK). Az idei alkalom nem csak a tíz éves jubileum miatt volt különleges. A konferencia első alkalommal külföldi kutatók számára is meghirdetésre került, így ezzel nemzetközi szakmai konferenciává vált, amin hazai és külföldi kutatók magyar és angol nyelvű előadásait lehet megtekinteni. Beszámolónkban áttekintjük az elmúlt tíz év legfontosabb állomásait, a kialakulás és a fejlődés folyamatát. A kulcsszavak vizsgálatával körvonalazzuk, mely területek voltak a konferencián hangsúlyosak. Ennek megfelelően választottunk ki, a plenáris előadásokon felül, néhány prezentációt, amelyeket röviden bemutatunk, ezzel érzékeltetve a konferencia gazdagságát és szakmai színvonalát

Draft Genome Sequence of an Escherichia coli O157:H43 Strain Isolated from Cattle

Here we report the draft genome sequence of an Escherichia coli O157:H43 strain, designated T22, with an atypical virulence gene profile and isolated from healthy cattle. T22 produces cytolethal distending toxin V (CDT-V) and belongs to phylogenetic group B1 and sequence type 155 (ST155)

THE CONVERGENCE OF THE OSPF ROUTING PROTOCOL

In this paper an OSPF convergence time prediction model is introduced. It is based on examining the behaviour OSPF and on the analysis of the generated data by OSPF flooding. The model was validated and refined by tests and experiments on a test network built for this work. The resultant model can be used to predict the effect and convergence of a change in an OSPF network. This feature is very usable for pre-emptive network management and network planning

The Design of a Small-scale Plastic Extruder Machine

This paper discusses the design steps, working principle and structure of a small-scale thermo-plastic extrusion machine that will be used in a laboratory at the Sapientia University. The aim of the laboratory is to present the polymer processing technologies by student-built machines and to stress the importance of plastic recycling. In order to recycle plastic parts a grinding process is necessary, followed by extrusion. During the process the machine melts the polymer and extrudes a filament that can be converted into granulates or used as it is. The structure of the extrusion machine is rather similar to that of a commercial one, however it focuses on presenting the manufacturing principles and cost effectiveness