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Über Raum reden [chapter]

Johannes Wirths
2014 Konstruktion und Kontrolle  
1) Dieses Wort erwies sich als "absolut durchsichtig, präzis, anständig und treu in seinem Dienst, solange es seine Rolle als Teil einer Rede spielte oder von jemandem ausgesprochen wurde, der über irgendetwas sprechen wollte. Aber jetzt ist das Wort allein, so bei den Flügeln genommen. Es rächt sich. Es macht uns glauben, dass es mehr Bedeutung habe, als es Funktionen hat. Es war nur ein Mittel, und jetzt ist es zum Selbstzweck geworden, zum Gegenstand eines grässlichen philosophischen
more » ... ns. Es verwandelt sich in ein Rätsel, in einen Abgrund, in eine Marter des Denkens" (Valéry 1962, S. 138 f.). Soll man da über dieses Wort reden, über Raum und sein semantisches Feld? Lässt es sich vermeiden, dass dieses unscheinbare Wort, auf diese Weise leicht fertig zum Begriff gemacht, zu etwas Unlösbarem, Unauslotbarem und Unerträglichem wird? Ist es nicht gerade dieses aufgeräumt daher kommende Wort, das zunächst so sehr auf Konkretes abhebt, auf Wahrzunehmendes und Körperliches, welches sich in begriffl icher Entfaltung dazu anschickt, die Welt des Menschen zu besiedeln, allem zu Grunde zu liegen, alles zu ordnen, alles und nichts zu umgreifen und damit in das Abstrakteste zu entweichen? Und war es nicht genau diese Vokabel, die politisch leichthin "zum Zauberwort vergötzt, [...] nicht nur faulen, sondern bösen und furchtbaren Zauber geübt hat?" (Sternberg et al. S. 116). Hat sich nicht bereits das, was "in so schöngeistigen Wissenschaft en wie der Kunstphilosophie und der Kulturanalyse zu 'Raum' gemischt und gebraut worden war [...], den Destillierkolben der geschwätzigen Alchimisten entweichend, als betäubender Dunst über das Denken und Reden eines ganzen Volkes gelegt" (ebd.)? Sollte man da jetzt nicht besser gleich ganz vom Raum schweigen und die Beschreibung des Hin-oder Weg-, des Aus-oder Einräumens dem gewöhnlichen, wenn auch nicht P. Goeke et al. (Hrsg.), Konstruktion und Kontrolle,
doi:10.1007/978-3-658-03644-7_2 fatcat:jywcdok4z5djribb23mkzp7h2u

ASR in German: A Detailed Error Analysis [article]

Johannes Wirth, Rene Peinl
2022 arXiv   pre-print
The amount of freely available systems for automatic speech recognition (ASR) based on neural networks is growing steadily, with equally increasingly reliable predictions. However, the evaluation of trained models is typically exclusively based on statistical metrics such as WER or CER, which do not provide any insight into the nature or impact of the errors produced when predicting transcripts from speech input. This work presents a selection of ASR model architectures that are pretrained on
more » ... e German language and evaluates them on a benchmark of diverse test datasets. It identifies cross-architectural prediction errors, classifies those into categories and traces the sources of errors per category back into training data as well as other sources. Finally, it discusses solutions in order to create qualitatively better training datasets and more robust ASR systems.
arXiv:2204.05617v1 fatcat:6ajhkbjpazdkratpk3kmeydzge

HUI-Audio-Corpus-German: A high quality TTS dataset [article]

Pascal Puchtler, Johannes Wirth, René Peinl
2021 arXiv   pre-print
The increasing availability of audio data on the internet lead to a multitude of datasets for development and training of text to speech applications, based on neural networks. Highly differing quality of voice, low sampling rates, lack of text normalization and disadvantageous alignment of audio samples to corresponding transcript sentences still limit the performance of deep neural networks trained on this task. Additionally, data resources in languages like German are still very limited. We
more » ... ntroduce the "HUI-Audio-Corpus-German", a large, open-source dataset for TTS engines, created with a processing pipeline, which produces high quality audio to transcription alignments and decreases manual effort needed for creation.
arXiv:2106.06309v1 fatcat:az3zpdha4zd5npdqei2troyyym

Preference Learning from Annotated Game Databases

Christian Wirth, Johannes Fürnkranz
2014 Lernen, Wissen, Daten, Analysen  
This paper briefly summarizes the key results, for details we refer to Wirth and Fürnkranz [18] . In Section 2, we discuss the information than can typically be found in annotated chess games.  ... 
dblp:conf/lwa/WirthF14 fatcat:bemb5ievircgdbxxj6kg52nurq

X.509-Compliant Hybrid Certificates for the Post-Quantum Transition

Nina Bindel, Johannes Braun, Luca Gladiator, Tobias Stöckert, Johannes Wirth
2019 Journal of Open Source Software  
We provide an X.509-standard-compliant Java implementation of hybrid certificates, which enable the parallel usage of two independent cryptographic schemes within public key infrastructures and related applications. This enables a stepwise transition to post-quantum secure and hybrid algorithms without the risk of incompatibility problems.
doi:10.21105/joss.01606 fatcat:zbxrm345szfzrggdwj5gckk7ge

Reply from Authors re: Manfred P. Wirth, Johannes Huber. What Really Matters Is Rarely Measured: Outcome of Routine Care and Patient-reported Outcomes. Eur Urol 2013;64:58–9

Khurshid A. Guru, James O. Peabody, Kamran Ahmed, Adam Kibel, Alon Weizer, Matthew Hayn, Raza Johar, Piyush Agarwal, M. Balbay, Ashok Hemal, Fred Muhletaler, Kenneth Nepple (+13 others)
2013 European Urology  
We welcome the opportunity to address the editorial from Wirth and Huber [1] and would like to thank the authors for their comments.  ... 
doi:10.1016/j.eururo.2013.02.034 pmid:23522910 fatcat:6mqhtwiodfhothmfstiov7rtem

Onsite-Werkverträge: Verbreitung und Praktiken im Verarbeitenden Gewerbe

Markus Hertwig, Johannes Kirsch, Carsten Wirth
2015 WSI-Mitteilungen  
Die Interviews wurden -bis auf eine Ausnahme -aufgezeichnet, transkribiert und mit Bezug zu strukturationstheoretischen Kategorien (grundlegend Giddens 1984; einführend Sydow/Wirth 2014) inhaltsanalytisch  ... 
doi:10.5771/0342-300x-2015-6-457 fatcat:muacbhmdonaftpaosbz6klzajm

Fachgesellschaft und Disziplinentwicklung – Die Österreichische Gesellschaft für Forschung und Entwicklung im Bildungswesen (ÖFEB) [chapter]

Herbert Altrichter, Ferdinand Eder, Maria Wirth, Andreas Reichl, Marcus Gräser
2017 50 Jahre Johannes Kepler Universität Linz  
Schlagworte: Fernstudium, Hochschulentwicklung, wissenschaftliche Weiterbildung Entwicklung einer Fachgesellschaft: Die Deutsche Gesellschaft für wissenschaftliche Weiterbildung und Fernstudium e.V. im Wandel (Beate Hörr) Die DGWF blickt auf eine mehr als 45-jährige Geschichte zurück. Dies ist der Anlass die Entwicklung und den Wandel des AUE/der DGWF sowie ihre gewachsenen Strukturen zu beschreiben. Der Beitrag verortet außerdem die DGWF im nationalen, europäischen und internationalen Kontext.
more » ... Es geht um den Beitrag der DGWF zu Fragen der Standortbestimmung und Definitionen der wissenschaftlichen Weiterbildung, veröffentlicht in ihrer Zeitschrift Hochschule und Weiterbildung, ihren Empfehlungen und Beiträgen. Wissenskooperation durch Tagungen und Publikationen (Wolfgang Jütte/Claudia Lobe/Markus Walber) Der Beitrag wirft einen Blick auf die "Kommunikationsinfrastruktur" der DGWF: die Jahrestagungen und ihre Fachzeitschrift. Es wird nachgezeichnet, wie über die Jahrzehnte die Bedarfe an Kommunikation und ihre Formen einen kontinuierlichen Wandel erfahren haben. Dabei wird ein besonderer Blick auf unterschiedliche Akteursgruppen mit ihren jeweiligen Kommunikationsansprüchen geworfen. Ein Schwerpunkt wird auf die Auswertungsverfahren (Monitoring) der Jahrestagung und die veränderten Publikationsstrategien gelegt. Diese Publikation ist unter folgender Creative-Commons-Lizenz veröffentlicht: Creative Commons Namensnennung -Weitergabe unter gleichen Bedingungen 3.0 Deutschland Lizenz http://creativecommons.org/licenses/by-sa/3.0/de/ Zitiervorschlag Hörr, B./Jütte, W./Lobe, C. u.a.: Zielsetzung und Wirkungsweise: die Fachgesellschaften. In: Hörr, B./Jütte, W. (Hg.): Weiterbildung an Hochschulen. S. 13-47, Bielefeld 2017. Abstract Die DGWF blickt auf eine mehr als 45-jährige Geschichte zurück. Dies ist der Anlass die Entwicklung und den Wandel des AUE/der DGWF sowie ihre gewachsenen Strukturen zu beschreiben. Der Beitrag verortet außerdem die DGWF im nationalen, europäischen und internationalen Kontext. Es geht um den Beitrag der DGWF zu Fragen der Standortbestimmung und Definitionen der wissenschaftlichen Weiterbildung, veröffentlicht in ihrer Zeitschrift Hochschule und Weiterbildung, ihren Empfehlungen und Beiträgen.
doi:10.7767/9783205205890-024 fatcat:chwojodxpfhufdr5fdvygeybbi

Spatial Transcriptomics Using Multiplexed Deterministic Barcoding in Tissue [article]

Johannes Wirth, Nina Compera, Kelvin Yin, Sophie Brood, Simon Chang, Celia P. Martinez-Jimenez, Matthias Meier
2022 bioRxiv   pre-print
SummaryIn this study, we present a multiplexed version of deterministic barcoding in tissue (xDbit) to acquire spatially resolved transcriptomes of nine tissue sections in parallel. New microfluidic chips were developed to spatially encode mRNAs over a total tissue area of 1.17 cm2 with spots of 50 μm×50 μm. Optimization of the biochemical protocol increased read and gene counts per spot by one order of magnitude compared with previous reports. Furthermore, the introduction of alignment markers
more » ... allows seamless registration of images and spatial transcriptomic spot coordinates. Together with technological advances, we provide an open-source computational pipeline to transform raw sequencing data from xDbit experiments into the AnnData format. The functionality of xDbit was demonstrated by the acquisition of 18 spatially resolved transcriptomic datasets from five different murine organs, including cerebellum, liver, kidney, spleen, and heart. Factor analysis and deconvolution of xDbit spatial transcriptomes allowed for in-depth characterization of the murine kidney.
doi:10.1101/2022.08.30.505834 fatcat:cyetkk726rel5nofcjffkmdu3q

EPMC: Every Visit Preference Monte Carlo for Reinforcement Learning

Christian Wirth, Johannes Fürnkranz
2013 Asian Conference on Machine Learning  
Wirth & J. Fürnkranz.  ...  The Wirth and Fürnkranz (2013) algorithm This algorithm also uses every-visit Monte Carlo estimates, but the relative difference is not stored in terms of a Q-function, but as probability of an action  ... 
dblp:conf/acml/WirthF13 fatcat:woew2hon4nhszgl43sj5jvnx7a

On Learning From Game Annotations

Christian Wirth, Johannes Furnkranz
2015 IEEE Transactions on Computational Intelligence and AI in Games  
Most of the research in the area of evaluation function learning is focused on self-play. However in many domains, like chess, expert feedback is amply available in the form of annotated games. This feedback comes usually in the form of qualitative information due to the inability of humans to determine precise utility values for game states. We are presenting a first step towards integrating this qualitative feedback into evaluation function learning by reformulating it in terms of
more » ... We extract preferences from large-scale database for annotated chess games and use them for calculating the feature weights of a heuristic chess position evaluation function. This is achieved by extracting the feature weights out of the linear kernel from a learned SVMRANK model, based upon the given preference relations. We evaluate the resulting function by creating multiple heuristics based upon different sized subsets of the trainings data and compare them in a tournament scenario. Although our results did not yield a better chess playing program, the results confirm that preferences derived from game annotations may be used to learn chess evaluation functions.
doi:10.1109/tciaig.2014.2332442 fatcat:sh5tti6jlred5cf4g6zjmh5y3u

Preference-Based Monte Carlo Tree Search [chapter]

Tobias Joppen, Christian Wirth, Johannes Fürnkranz
2018 Lecture Notes in Computer Science  
Monte Carlo tree search (MCTS) is a popular choice for solving sequential anytime problems. However, it depends on a numeric feedback signal, which can be difficult to define. Real-time MCTS is a variant which may only rarely encounter states with an explicit, extrinsic reward. To deal with such cases, the experimenter has to supply an additional numeric feedback signal in the form of a heuristic, which intrinsically guides the agent. Recent work has shown evidence that in different areas the
more » ... derlying structure is ordinal and not numerical. Hence erroneous and biased heuristics are inevitable, especially in such domains. In this paper, we propose a MCTS variant which only depends on qualitative feedback, and therefore opens up new applications for MCTS. We also find indications that translating absolute into ordinal feedback may be beneficial. Using a puzzle domain, we show that our preference-based MCTS variant, wich only receives qualitative feedback, is able to reach a performance level comparable to a regular MCTS baseline, which obtains quantitative feedback.
doi:10.1007/978-3-030-00111-7_28 fatcat:sobyjl46svexbg5igsqqn6ezea

Stability-Preserving Optimization in the Presence of Fast Disturbances

Benedikt Wirth, Johannes Gerhard, Wolfgang Marquardt
2011 IEEE Transactions on Automatic Control  
We present a method to robustly optimize a set of design parameters for a dynamical system which is subject to fast disturbances. These disturbances are themselves parameterized by a finite number of parameters. Robustness is ensured by requiring the disturbance parameters to stay sufficiently far away from critical manifolds in the parameter space, at which the system would lose stability. These manifolds are defined by an algebraic condition on the system trajectories. The closest distance to
more » ... the critical manifolds is measured along their normal vectors.
doi:10.1109/tac.2011.2160029 fatcat:523ei62wezgz3b3dcmvyv2fk6q

Luteinizing hormone and androstendione are independent predictors of ovulation after laparoscopic ovarian drilling: a retrospective cohort study

Johannes Ott, Stefan Wirth, Kazem Nouri, Christine Kurz, Klaus Mayerhofer, Johannes C Huber, Clemens B Tempfer
2009 Reproductive Biology and Endocrinology  
Our objective was to investigate luteinizing hormone, follicle-stimulating hormone, testosterone, and androstenedione as predicitve markers for ovulation after laparoscopic ovarian drilling. Methods: We retrospectively analyzed 100 clompihen-resistant patients with the polycystic ovary syndrome who underwent laparoscopic ovarian drilling at our department. The main outcome measure was spontaneous postoperative ovulation within three months after laparoscopic ovarian drilling. In order to
more » ... spontaneous ovulation, we tested the following parameters by use of a univariate followed by a multivariate regression model: Preoperative serum levels of LH, FSH, testosterone, and androstenedione as well as patients' age and body mass index. In addition, we focused on pregnancy and life birth rates. Results: Spontaneous ovulation was documented in 71/100 patients (71.0%). In a univariate and multivariate analysis, luteinizing hormone (OR 1.58, 95%CI: 1.30-1.92) and androstenedione (OR 3.03, 95%CI: 1.20-7.67), but not follicle-stimulating hormone and testosterone were independent predictors of ovulation. Using a cut-off for luteinizing hormone and androstenedione of 12.1 IU/l and 3.26 ng/ml, respectively, spontaneous ovulation was observed in 63/70 (90.0%) and 36/42 patients (85.7%) with elevated and in 8/30 (26.7%) and 35/58 (60.3%) patients with low luteinizing hormone and androstenedione levels, respectively. The sensitivity, specificity, positive and negatvie predictive values for luteinizing hormone and androstendione as predictors of spontaneous ovulation after ovarian drilling were 88.7% (95%CI: 79.0-95.0%), 75.9% (95%CI: 56.5-89.7%), 90.0% (95%CI: 80.5-95.8%), and 73.3% (95%CI: 54.1-87.7%) for luteinizing hormone, and 50.for androstenedione, respectively. Complete one-year follow-up was available for 74/100 patients (74%). We observed a one-year pregnancy rate and a resulting life-birth rate of 61% and 51%, respectively. Conclusions: Luteinizing hormone and androstenedione prior to laparoscopic ovarian drilling are independent predictors of spontaneous ovulation within three months of surgery. We suggest to preferentially performing laparoscopic ovarian drilling in patients with high luteinizing hormone and androstenedione levels.
doi:10.1186/1477-7827-7-153 pmid:20042102 pmcid:PMC2806311 fatcat:xqxus2etgrdeplk4g6qetk27lq

Track J. Clinical Engineering and Hospital Technology

Johannes Schmidt, Christin Wenzel, Marlene Mahn, Sashko Spassov, Heidi Cristina-Schmitz, Silke Borgmann, Jörg Haberstroh, Stephan Meckel, Steffen Wirth, Stefan Schumann
2016 Biomedical Engineering  
Emergency access to the airway with small bore catheters is commonly accepted. However, ventilation is limited by insufficient expiratory flow due to the generated high airway resistance. In a controlled in-vivo trial we evaluate a new automatic mechanical ventilator with an "Expiratory Ventilation Assistance" (EVA) via a cuffed endotracheal tube having an inner diameter of 2 mm. This allows a fully controlled ventilation, i.e. flow controlled inspiration and active expiration induced by
more » ... ing. Anesthetised pigs (40-51 kg, 7 per group) were either ventilated with a conventional ventilator (Evita 4, Dräger Medical, Lübeck, Germany; = control group) or the mechanical EVA-ventilator prototype (Ventinova Medical BV, Eindhoven, The Netherlands; = EVA group) for five hours. Respiratory parameters, arterial blood gases (ABG) and hemodynamic markers were recorded hourly. After five hours a computed tomography (CT) of the thorax was performed. For statistical analyses the Welch's t-test was performed. The EVA-ventilator achieved a minute volume up to 6.2 l/min. Mean airway pressure was significantly higher in the EVA group compared to the control group (12.0 ± 0.6 mbar vs. 8.9 ± 0.2 mbar, p=0.0007). Arterial O2 partial pressure was significantly higher in the EVA-group (142.6 ± 5.6 mmHg vs. 130.7 ± 3.1 mmHg, p=0.006). Despite a significantly lower minute volume in the EVA group (5.5 ± 0.4 l/min vs. 6.7 ± 0.9 l/min, p=0.04), arterial CO2 partial pressure was comparable in both groups (41.3 ± 1.6 mmHg vs. 41.5 ± 1.2 mmHg, p=0.83). Mean arterial pressure was significantly lower in the EVA group (71 ± 9 mmHg vs. 89 ± 9 mmHg, p=0.02). The CT revealed a more constant and steady distribution of ventilation during a breathing cycle in the EVA group. Our results suggest that gas exchange is improved due to increased alveolar ventilation with EVA.
doi:10.1515/bmt-2016-5008 pmid:27682690 fatcat:cctow7qupzf7bk2hmvvbs6up4m
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