Topic Map Generation Using Text Mining

Starting from text corpus analysis with linguistic and statistical analysis algorithms, an infrastructure for text mining is described which uses collocation analysis as a central tool. This text mining method may be applied to different domains as well as languages. Some examples taken form large reference databases motivate the applicability to knowledge management using declarative standards of information structuring and description. The ISO/IEC Topic Map standard is introduced as a candidate for rich metadata description of information resources and it is shown how text mining can be used for automatic topic map generation

Wissensextraktion durch linguistisches Postprocessing bei der Corpusanalyse

Der vorliegende Beitrag befaßt sich mit einem mehrstufigen Ansatz zur Analyse großer Textcorpora. Dabei liegt der Schwerpunkt auf der Untersuchung sekundärer, insbesondere linguistischer Filter für die Optimierung statistischer Analyseverfahren. Neben Beispielen für solche Filterverfahren werden auch praktische Anwendungen aufgezeigt

Grammatik und Wirtschaft : die kontrastive Hypertextgrammatik

Um den schwierigen Wettbewerbsbedingungen im internationalen Vergleich entgegentreten zu können, benötigen kleine und mittlere Unternehmen nicht nur den Einsatz moderner Informationstechniken und eine kommerzielle Präsenz im multimedialen und grafikintensiven Teil des Internets, sondern auch eine an den Kunden angepasste Web-Präsenz. In diesem Sinne widmen wir uns in diesem Beitrag der wirtschaftlichen Notwendigkeit einer kontrastiven Hypertextgrammatik. In den letzten Jahren ist dank der zunehmenden Bedeutung des Internets als Handelsplattform eine grammatische Unterdisziplin entstanden, die zur Geschäftsoptimierung kleiner und mittlerer Unternehmen einen beachtlichen Beitrag leisten könnte: die kontrastive Hypertextgrammatik. Wir gehen hier der Frage nach, wie man bei einer kontrastiven hypertextgrammatischen Studie vorgehen könnte

Neue Medien in der linguistischen Lehre : Überlegungen zu multi- bzw. hypermedialen CD-ROMs

Der Aufsatz setzt sich mit Möglichkeiten und Grenzen der sog. neuen Medien (mit besonderer Berücksichtigung von Hypermedia) im Hinblick auf ihren Einsatz bei der universitären Linguistik-Vermittlung auseinander. Es werden sowohl allgemeine Überlegungen zur sinnvollen Anwendung der neueren technischen Errungenschaften in der linguistischen Lehre angestellt als auch spezielle Erfahrungen und Einsichten anhand der Konzipierung und Erstellung einer 1999 erschienenen CD-ROM zum Thema "Linguistik und Gesellschaft" - die erste hypermediale ausgesprochen linguistische CD-ROM in Ungarn - dargelegt. Zudem erörtert der Beitrag Arbeitsaspekte für die demnächst erscheinende CD-ROM "Sprachwissenschaftliche Grundfragen"

First Valence, Then Arousal: The Temporal Dynamics of Brain Electric Activity Evoked by Emotional Stimuli

The temporal dynamics of the neural activity that implements the dimensions valence and arousal during processing of emotional stimuli were studied in two multi-channel ERP experiments that used visually presented emotional words (experiment1) and emotional pictures (experiment2) as stimulus material. Thirty-two healthy subjects participated (mean age 26.8±6.4years, 24 women). The stimuli in both experiments were selected on the basis of verbal reports in such a way that we were able to map the temporal dynamics of one dimension while controlling for the other one. Words (pictures) were centrally presented for 450 (600) ms with interstimulus intervals of 1,550 (1,400) ms. ERP microstate analysis of the entire epochs of stimulus presentations parsed the data into sequential steps of information processing. The results revealed that in several microstates of both experiments, processing of pleasant and unpleasant valence (experiment1, microstate #3: 118-162ms, #6: 218-238ms, #7: 238-266ms, #8: 266-294ms; experiment2, microstate #5: 142-178ms, #6: 178-226ms, #7: 226-246ms, #9: 262-302ms, #10: 302-330ms) as well as of low and high arousal (experiment1, microstate #8: 266-294ms, #9: 294-346ms; experiment2, microstate #10: 302-330ms, #15: 562-600ms) involved different neural assemblies. The results revealed also that in both experiments, information about valence was extracted before information about arousal. The last microstate of valence extraction was identical with the first microstate of arousal extractio

At the edge of intonation: the interplay of utterance-final F0 movements and voiceless fricative sounds

The paper is concerned with the 'edge of intonation' in a twofold sense. It focuses on utterance-final F0 movements and crosses the traditional segment-prosody divide by investigating the interplay of F0 and voiceless fricatives in speech production. An experiment was performed for German with four types of voiceless fricatives: /f/, /s/, /ʃ/ and /x/. They were elicited with scripted dialogues in the contexts of terminal falling statement and high rising question intonations. Acoustic analyses show that fricatives concluding the high rising question intonations had higher mean centres of gravity (CoGs), larger CoG ranges and higher noise energy levels than fricatives concluding the terminal falling statement intonations. The different spectral-energy patterns are suitable to induce percepts of a high 'aperiodic pitch' at the end of the questions and of a low 'aperiodic pitch' at the end of the statements. The results are discussed with regard to the possible existence of 'segmental intonation' and its implication for F0 truncation and the segment-prosody dichotomy, in which segments are the alleged troublemakers for the production and perception of intonation

Empirical research of collocations in foreign language learning

This scientific paper presents a corpus-based investigative research of German collocations; in text comprehension, a new method for identification of collocations is presented, as well as a scientific discussion of the types of collocations for which this new analysis method is suitable. The article further explores the consequences of using collocations and their translation into other languages on communication in foreign language teaching. It was examined how the students of foreign languages in Slovak universities (non philological courses of studies) can deal with the collocations in their future profession (as translators or experts in a professional language) after their linguistic studies and whether they are able to actually implement this foreign language competence in the future. Although vocabulary work is developed as a primary competence among foreign language learners, some areas of studies lack current, creative and innovative teaching materials, especially in the didactic field of comparative collocation research. The results of our research projects promote the acquisition of foreign language skills and help teachers develop and use new methods in their work

Regionale elektronische Zeitungen. Qualitätskriterien und Evaluierung

Regionale und lokale Zeitungen sind durch besondere Qualitätsmerkmale gekennzeichnet, die imvorliegenden Beitrag diskutiert werden. Ausgehend von dem Konstanzer Ansatz zur Bewertungvon Informationsdienstleistungen werden zeitungsspezifische Kriterien eingearbeitet und denfünf Hauptkennzahlen Information, Präsentation, Interaktion und Kommunikation, Technik und Methodik sowie Organisatorisches und Soziales zugeordnet. In einer ersten Untersuchung wurdedie Tauglichkeit des Ansatzes anhand der regionalen Tageszeitungen Südkurier und SchwäbischeZeitung, die beide ihr Verbreitungsgebiet am Bodensee haben, untersucht. (DIPF/Orig.

First valence, then arousal: the temporal dynamics of brain electric activity evoked by emotional stimuli

The temporal dynamics of the neural activity that implements the dimensions valence and arousal during processing of emotional stimuli were studied in two multi-channel ERP experiments that used visually presented emotional words (experiment 1) and emotional pictures (experiment 2) as stimulus material. Thirty-two healthy subjects participated (mean age 26.8 +/- 6.4 years, 24 women). The stimuli in both experiments were selected on the basis of verbal reports in such a way that we were able to map the temporal dynamics of one dimension while controlling for the other one. Words (pictures) were centrally presented for 450 (600) ms with interstimulus intervals of 1,550 (1,400) ms. ERP microstate analysis of the entire epochs of stimulus presentations parsed the data into sequential steps of information processing. The results revealed that in several microstates of both experiments, processing of pleasant and unpleasant valence (experiment 1, microstate #3: 118-162 ms, #6: 218-238 ms, #7: 238-266 ms, #8: 266-294 ms; experiment 2, microstate #5: 142-178 ms, #6: 178-226 ms, #7: 226-246 ms, #9: 262-302 ms, #10: 302-330 ms) as well as of low and high arousal (experiment 1, microstate #8: 266-294 ms, #9: 294-346 ms; experiment 2, microstate #10: 302-330 ms, #15: 562-600 ms) involved different neural assemblies. The results revealed also that in both experiments, information about valence was extracted before information about arousal. The last microstate of valence extraction was identical with the first microstate of arousal extraction