Sensing of meteorological variables by laser probe techniques Final report, 1 Aug. 1966 - 30 Jun. 1970

Optical laser sensing of atmospheric parameter

On Binomial Ideals associated to Linear Codes

Recently, it was shown that a binary linear code can be associated to a binomial ideal given as the sum of a toric ideal and a non-prime ideal. Since then two different generalizations have been provided which coincide for the binary case. In this paper, we establish some connections between the two approaches. In particular, we show that the corresponding code ideals are related by elimination. Finally, a new heuristic decoding method for linear codes over prime fields is discussed using Gr\"obner bases

XMM-Newton observation of SN1993J in M81

In April 2001 SN1993J was observed with both the PN and MOS cameras of the XMM-Newton observatory, resulting in about 7. x 10^4 s of acceptable observation time. Fit results with both the PN and MOS2 camera spectra studying different spectral models are presented. The spectra are best fitted in the energy range between 0.3 and 11 keV by a 2-component thermal model with temperatures of kT_1 = 0.34+-0.04 keV and kT_2 = 6.54+-4 keV, adopting ionization equilibrium. A fit with a shock model also provides acceptable results. Combining the XMM-Newton data with former X-ray observations of the supernova, we discuss the general trend of L_x propto t^{-0.30} and the bump of the X-ray light curve as well as former and recent spectral results in the light of the standard SN model as first proposed by Chevalier in 1982.Comment: 7 pages, 3 figure

An electronic pan/tilt/zoom camera system

A camera system for omnidirectional image viewing applications that provides pan, tilt, zoom, and rotational orientation within a hemispherical field of view (FOV) using no moving parts was developed. The imaging device is based on the effect that from a fisheye lens, which produces a circular image of an entire hemispherical FOV, can be mathematically corrected using high speed electronic circuitry. An incoming fisheye image from any image acquisition source is captured in memory of the device, a transformation is performed for the viewing region of interest and viewing direction, and a corrected image is output as a video image signal for viewing, recording, or analysis. As a result, this device can accomplish the functions of pan, tilt, rotation, and zoom throughout a hemispherical FOV without the need for any mechanical mechanisms. A programmable transformation processor provides flexible control over viewing situations. Multiple images, each with different image magnifications and pan tilt rotation parameters, can be obtained from a single camera. The image transformation device can provide corrected images at frame rates compatible with RS-170 standard video equipment

Influence of complex disorder on skew-scattering Hall effects in L10L1_0-ordered FePt alloy

We show by first-principles calculations that the skew-scattering anomalous Hall and spin-Hall angles of L$1_0$-ordered FePt drastically depend on different types of disorder. A different sign of the AHE is obtained when slightly deviating from the stoichiometric ratio towards the Fe-rich side as compared to the Pt-rich side. For stoichiometric samples, short-range ordering of defects has a profound effect on the Hall angles and can change them by a factor of $2$ as compared to the case of uncorrelated disorder. This might explain the vast range of anomalous Hall angles measured in experiments, which undergo different preparation procedures and thus might differ in their crystallographic quality

Nutzbarmachung und Nutzung maschineller Wörterbücher in der Fachinformation und im Büro

Zimmermann betrachtet Wörterbücher hier aus der Sicht der Information und Kommunikation bzw. des Wissenstransfers. "Wörterbücher stellen - aus dieser Sicht der Informationsverarbeitung - Informationssammlungen dar, die formal oder natürlichsprachlich dargestelltes Wissen zu vorwiegend sprachbezogenen Sachverhalten speichern und verfügbar machen." Zi. geht auf die neuen Rahmenbedingungen für die Entwicklung und Nutzung von Wörterbüchern insb. in der Fachinformation und Bürokommunikation ein. Er nimmt an, "dass im Jahre 2000 ... umfangreiche Wörterbücher ... per Kabel distribuiert und verfügbar werden, dass z.B. ein neues Enzyklopädisches "Lexikon" ... on-line abrufbar wird"

Das Projekt "JUDO-DS" : juristische Dokumentanalyse im Bereich Datenschutz

Der Beitrag enthält eine Beschreibung des Systems JUDO-DS (Analyse juristischer Texte aus dem Bereich Datenschutz) sowie seiner linguistischen Grundlagen und der Anwendungsmöglichkeiten (mit zahlreichen Abbildungen und Beispielen)

Automatic indexing and retrieval as a tool to improve information and technology transfer

During the last 20 years, linguistic data processing mainly has been seen as a tool to develop linguistic regularities (or detect irregularities) of a given natural language, especially to handle large textual databases ("Corpora"). A second motivation to use a computer was to test some theories or models of a language system (or a part of it) using a simulation program. As a result of both strategies, the "Saarbrücken Text Analysis System" has been implemented. At present, a very large lexical database is available to analyse written German texts morphologically and syntactically. The syntactic parser is able to handle every German sentence with more than 90% "correct" results. On the other hand, the development of large (textual) databases within different fields (e.g. law, patent specifications, medicine) is increasing rapidly. Therefore, a computer aided indexing system ("Computergestützte Texterschließung: CTX") has been developed at Regensburg and Saarbrücken University to improve the (even natural language oriented) access to textual data ("free text") applying linguistic strategies to information retrieval processes. Main results of feasibility studies, especially in the field of German Patent Documentation, are presented