498 research outputs found
High efficiency gaseous tracking detector for cosmic muon radiography
A tracking detector system has been constructed with an innovative approach
to the classical multi-wire proportional chamber concept, using contemporary
technologies. The detectors, covering an area of 0.58 square meters each, are
optimized for the application of muon radiography. The main features are high
(>99.5%) and uniform detection efficiency, 9 mm FWHM position resolution,
filling gas consumption below 2 liters per hour for the non toxic, non
flammable argon and carbon dioxide mixture. These parameters, along with the
simplicity of the construction and the tolerance for mechanical effects, make
the detectors to be a viable option for a large area muography observation
system.Comment: 15 pages, 15 figure
SOFTWARE PROBLEMS OF AN EXPERIMENTAL ROBOT CONTROLLER BASED ON QNX REAL-TIME OPERATING SYSTEMS
At the Department of Automation and Applied Informatics an experimental
robot control system has been developed. The purpose of this research is to
study modern robot control algorithms and their realization in a real
environment. The project focuses on the problems of multiprocessor systems
including the task distribution and communication. Another field of this
research is to integrate a six-component force-torque sensor into the robot
control system and making use of this information in new robot control
algorithms. Another purpose of this study is to examine the software
problems of an IBM PC-based multiprocessor system controlling a NOKIA-PUMA
560 humanoid robot arm. The features and system services of the new QNX
Neutrino operating system is presented in comparison with the previously
used QNX v4. The main areas of the version upgrade will be shown focusing on
the interprocess communication questions. The processing components of this
multiprocessor robot control system with its external interfaces will be
discussed later and some further system level development possibilities will
be outlined. This final part of the study gives the summary of the
architectural and communication requirements of a hybrid position and force
control system in the above environment
Occurrence of the alien zigzag elm sawfly, Aproceros leucopoda (Hymenoptera: Argidae), in arboretums and botanical gardens of Hungary
Background and purpose: The invasive alien zigzag elm sawfly, Aproceros leucopoda (Hymenoptera: Argidae), native to East Asia, was identified as a new pest of elms (Ulmus spp.) in Europe in 2003. Following the first records in Poland and Hungary, it has been found in many other European countries. Plant taxa on which damage by larval feeding has been observed under natural conditions either in Asia or in Europe all belong to the genus Ulmus. Ulmus pumila (including var. arborea) seems to be a preferred host, but other species have also been reported as having suffered severe defoliation by the pest. One objective of our study was to complete information on the distribution of the sawfly species in Hungary. Moreover, we searched for Ulmus taxa which might be affected under natural conditions.
Materials and methods: To provide data on distribution and susceptible elms, we carefully checked Ulmus taxa for the presence of any juvenile developmental stages of A. leucopoda and the characteristic feeding traces on leaves in 17 arboretums and botanical gardens throughout Hungary in
2011 and 2016.
Results and conclusions: We have recorded A. leucopoda or only the clear symptoms of damage by it at all the locations visited and totally on 20 Ulmus taxa. We have identified 14 of these for the first time as being susceptible to the pest. We suggest that the suitability for egg laying and sensitivity to at least partial damage by A. leucopoda of the damaged taxa should be considered before planting them for any purposes
Re-territorialization of Space in South Slovakia – Visual Practices of Village Signs
This article examines a recent example of symbolic geography and attempts to analyse the practice of reterritorialization of space by stressing the cultural and national character of particular settlements. The author shows that with expanding business, work and study opportunities globalisation may be causing the disappearance of borders, but on the other hand it can cause the emergence of renewed symbolic borders based on cultural and national identity. The article is based on a limited research project in a number of south Slovakian villages containing substantial Hungarian populations, focusing on village signs written in the runic székely script, which is identified by the author as a national symbol transported from Transylvania, and which recently became an ideal representation of authentic Hungarian culture. The signs link the towns with the memory of Greater Hungary, manifest the cultural and historical supremacy of Hungarians living in the area, and signify the territory,or in other words reterritorialize the space. The reterritorialization process creates a mental map that unites the Hungarian nation and shows that meaning and territory are strongly bounded
Differentiation-associated Downregulation of Poly(ADP-Ribose) Polymerase-1 (PARP-1) Expression in Skeletal Muscle Increases Its Resistance to Oxidative Stress
A LOW-COST ROBOT CONTROLLER AND ITS SOFTWARE PROBLEMS
In recent years the need for advanced robot control algorithms for industrial robots has
grown. The deyelopment of a low-cost robot controller to support the development, implementation
and testing of those algorithms which require high computational power
was targeted. This paper deals wiith the requirements of an experimental controller that
can be connected to a NOKIA PUMA 560 robot arm. It explains the IBM PC compatible
host and the TEXAS Digital Signal Processor (DSP) based hardware. On the host
computer the UNIX-like QXX real-time operating system is used. In the current phase of
development the robot controller works with the classical decentralised joint control based
strategy. The Advanced Robot Pogramming System (ARPS) explicit robot programming,
language is implementedl
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