Model-driven engineering approach to design and implementation of robot control system

In this paper we apply a model-driven engineering approach to designing domain-specific solutions for robot control system development. We present a case study of the complete process, including identification of the domain meta-model, graphical notation definition and source code generation for subsumption architecture -- a well-known example of robot control architecture. Our goal is to show that both the definition of the robot-control architecture and its supporting tools fits well into the typical workflow of model-driven engineering development.Comment: Presented at DSLRob 2011 (arXiv:cs/1212.3308

The effects of use values, amenities and payments for public goods on farmland prices: Evidence from Poland*

The article contributes to the debate on how land prices are affected by production values, by farming subsidies and by environmental amenities. The authors carried out a comprehensive review of the literature on the actual determinants of land value and made an attempt to classify different approaches to this matter. Then they performed an empirical case study of the drivers of agricultural land values in a leading agricultural region of Poland. The aim of the study is to establish how the use values of land, amenities and policy payments contribute to land values in the Single Area Payment Scheme (SAPS), which operates in Poland. The study is based on a sample of 653 transactions during the years 2010–2013. A hierarchical regression (ML-IGLS method) was used, where the unobserved heterogeneity is attributed to the location-specific factors at different levels of analysis. Results indicate that the policy payments for public goods decapitalise the value of land, whereas the environmental amenities have a relatively strong influence on farmland prices

Laser-induced Precession of Magnetization in GaMnAs

We report on the photo-induced precession of the ferromagnetically coupled Mn spins in (Ga,Mn)As, which is observed even with no external magnetic field applied. We concentrate on various experimental aspects of the time-resolved magneto-optical Kerr effect (TR-MOKE) technique that can be used to clarify the origin of the detected signals. We show that the measured data typically consist of several different contributions, among which only the oscillatory signal is directly connected with the ferromagnetic order in the sample.Comment: 4 pages, 5 figure

Super-resolution provided by the arbitrarily strong superlinearity of the blackbody radiation

Blackbody radiation is a fundamental phenomenon in nature, and its explanation by Planck marks a cornerstone in the history of Physics. In this theoretical work, we show that the spectral radiance given by Planck's law is strongly superlinear with temperature, with an arbitrarily large local exponent for decreasing wavelengths. From that scaling analysis, we propose a new concept of super-resolved detection and imaging: if a focused beam of energy is scanned over an object that absorbs and linearly converts that energy into heat, a highly nonlinear thermal radiation response is generated, and its point spread function can be made arbitrarily smaller than the excitation beam focus. Based on a few practical scenarios, we propose to extend the notion of super-resolution beyond its current niche in microscopy to various kinds of excitation beams, a wide range of spatial scales, and a broader diversity of target objects

Auf die Typen kommt es an. Eine empirische Analyse studentischer Spielertypen.

Aktuell streben Hochschulen nach Lösungen zur Senkung von Studienabbruchquoten, Anregung der Studienmotivation und Optimierung von Studieneingangsphasen. Diese hochschulpolitischen Ziele sind von großer Bedeutung für den demografischen Wandel und den steigenden Bedarf an hochqualifizierten Fachkräften. Viele verschiedene Konzepte versuchen diesen Zielen Rechnung zu tragen. Auch die Technische Universität Dresden (TUD) hat mit ihrem Gesamtkonzept zur Unterstützung des Studienerfolgs verschiedene Teilprojekte ins Leben gerufen. Eines davon ist das Studienassistenzsystem gOPAL, welches Studienanfängern der TUD beim Aufbau von Orientierungswissen und Kompetenzen der Studierfähigkeit unterstützt. [... aus dem Text

Development Tests of a Cryogenic Filter Wheel Assembly for the NIRCam Instrument

The James Webb Space Telescope is an infrared-optimized space telescope scheduled for launch in 201 3. Its 6.5-m diameter primary mirror will collect light from some of the first galaxies formed after the big bang. The Near Infrared camera (NIRCam) will detect the first light from these galaxies, provide the necessary tools for studying the formation of stars, aid in discovering planets around other stars, and adjust the wave front error on the primary mirror (Fig. 1). The instrument and its complement of mechanisms and optics will operate at a cryogenic temperature of 35 K. This paper describes tests and test results of the NIRCam Filter Wheel assembly prototype

Light-induced magnetization precession in GaMnAs

We report dynamics of the transient polar Kerr rotation (KR) and of the transient reflectivity induced by femtosecond laser pulses in ferromagnetic (Ga,Mn)As with no external magnetic field applied. It is shown that the measured KR signal consist of several different contributions, among which only the oscillatory signal is directly connected with the ferromagnetic order in (Ga,Mn)As. The origin of the light-induced magnetization precession is discussed and the magnetization precession damping (Gilbert damping) is found to be strongly influenced by annealing of the sample.Comment: 6 pages, 4 figures. accepted in Applied Physics Letter

Fine tuning of the catalytic effect of a metal-free porphyrin on the homogeneous oxygen reduction

The catalytic effect of tetraphenylporphyrin on the oxygen reduction with ferrocene in 1,2-dichloroethane can be finely tuned by varying the molar ratio of the acid to the catalyst present in the solution. The mechanism involves binding of molecular oxygen to the protonated free porphyrin base, in competition with ion pairing between the protonated base and the acid anion present