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Numerical RANS/URANS simulation of combustion noise [chapter]

Bernd Mühlbauer, Berthold Noll, Roland Ewert, Oliver Kornow, Manfred Aigner
2009 Combustion Noise  
The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. Cover design: eStudio Calamar S.L.
doi:10.1007/978-3-642-02038-4_1 fatcat:qgfrkrs7ancjljaeyfdbvpbpwi

Estimation of the prevalence at animal level of paratuberculosis in female cattle of Saxony-Anhalt (Germany)

Nicolai Denzin, Bernd Gehrmann, Benno Ewert, Holger Rohde
2011 Veterinary Science Development  
Johne's disease (paratuberculosis) is a chronic, untreatable disease of ruminants caused by Mycobacterium avium subspecies paratuberculosis. It leads to economic losses in livestock production but is also suspected to be involved in the pathogenesis of Crohn's disease in humans. In 2007/2008 a study was conducted to estimate the prevalence at animal level of paratuberculosis among the female cattle of Saxony-Anhalt (Germany). In order to keep study costs low and participating farms
more » ... no farms were visited to actively draw samples. Instead, animals were preselected in a formal random sampling process and additionally tested by ELISA for paratuberculosis when samples suitable for serology were routinely submitted to the State Office of Consumer Protection Saxony-Anhalt for any diagnostics. Out of 896 samples, 38 tested positive, giving an apparent prevalence of 4.2%. Based on the test quality traits of the ELISA employed in the study (POURQUIER ® ELISA Paratuberculosis) the true prevalence was estimated to 6.7% (95% CI, 3.0-10.4%). No spatial clustering of positive results was detected by a scan statistic. Prevalence estimates for age strata tended to show an incline to a maximum at age class of 5 years and a subsequent decline with higher age classes. Estimates tended to show an incline with herd size.
doi:10.4081/vsd.2011.e10 fatcat:bmw6cihlovhy5hvmbllbnyonum

Modelling human speech recognition in challenging noise maskers using machine learning

Birger Kollmeier, Constantin Spille, Angel Mario Castro Martínez, Stephan D. Ewert, Bernd T. Meyer
2020 Acoustical Science and Technology  
The advantage and limitations of utilizing automatic speech recognition (ASR) techniques for modelling human speech recognition are investigated for a set of "critical" speech maskers for which many standard models of human speech recognition fail. A deep neural net (DNN)-based ASR system utilizing a closed-set sentence recognition test is used to model the speech recognition threshold (SRT) of normal-hearing listeners for a variety of noise types. The benchmark data from Schubotz et al. (2016)
more » ... include SRTs measured in conditions with an increasing complexity in terms of spectro-temporal modulation (from stationary speech-shaped noise to a single interfering talker). The DNN-based model as proposed in Spille et al. (2018) produces a higher prediction accuracy than baseline models (i.e., SII, ESII, STOI, and mr-sESPM) even though it does not require a clean speech reference signal (as is the case for most auditory model-based SRT predictions). The most accurate predictions are obtained with multi-condition training with known noise types and ASR features that explicitly account for temporal modulations in noisy sentences. Another advantage of the approach is that the DNN can serve as valuable analysis tool to uncover signal recognition strategies: For instance, by identifying the most relevant cues for correct classification in modulated noise, it is shown that the DNN is listening in the dips. Finally, we present preliminary data indicating that the WER of the model can be replaced with an estimate of the WER, which does not require the transcript of utterances during test time and therefore eliminates an important limitation of the previous model that prevents it from being used in real-world scenarios.
doi:10.1250/ast.41.94 fatcat:uqf7hko6tjdc3ah4w4mcvh723e

Estimation of the prevalence at animal level of paratuberculosis in female cattle of Saxony-Anhalt (Germany)

Nicolai Denzin, Bernd Gehrmann, Benno Ewert, Holger Rohde
2011 Veterinary Science Development  
Johne's disease (paratuberculosis) is a chronic, untreatable disease of ruminants caused by Mycobacterium avium subspecies paratuberculosis. It leads to economic losses in livestock production but is also suspected to be involved in the pathogenesis of Crohn's disease in humans. In 2007/2008 a study was conducted to estimate the prevalence at animal level of paratuberculosis among the female cattle of Saxony-Anhalt (Germany). In order to keep study costs low and participating farms
more » ... no farms were visited to actively draw samples. Instead, animals were pre-selected in a formal random sampling process and additionally tested by ELISA for paratuberculosis when samples suitable for serology were routinely submitted to the State Office of Consumer Protection Saxony-Anhalt for any diagnostics. Out of 896 samples, 38 tested positive, giving an apparent prevalence of 4.2%. Based on the test quality traits of the ELISA employed in the study (POURQUIER® ELISA Paratuberculosis) the true prevalence was estimated to 6.7% (95% CI, 3.0-10.4%). No spatial clustering of positive results was detected by a scan statistic. Prevalence estimates for age strata tended to show an incline to a maximum at age class of 5 years and a subsequent decline with higher age classes. Estimates tended to show an incline with herd size.
doi:10.4081/vsd.2011.3504 fatcat:jbmmrffegndatnecktsjz6vn2a

Impact of pulmonary hypertension on gas exchange and exercise capacity in patients with pulmonary fibrosis

Sven Gläser, Oliver Noga, Beate Koch, Christian F. Opitz, Bernd Schmidt, Bettina Temmesfeld, Marcus Dörr, Ralf Ewert, Christoph Schäper
2009 Respiratory Medicine  
a v a i l a b l e a t w w w . s c i e n c e d i r e c t . c o m j o u r n a l h o m e p a g e : w w w . e l s e v i e r . c o m / l o c a t e / r m e d Respiratory Medicine (2009) 103, 317e324
doi:10.1016/j.rmed.2008.08.005 pmid:18804360 fatcat:y5uyoijd3zcr7np6fivxnpycsa

Value of Cardiopulmonary Exercise Testing in the Prognosis Assessment of Chronic Obstructive Pulmonary Disease Patients: A Retrospective, Multicentre Cohort Study

Ralf Ewert, Anne Obst, Andreas Mühle, Michael Halank, Jörg Winkler, Bernd Trümper, Gerhard Hoheisel, Andreas Hoheisel, Mark Wiersbitzky, Alexander Heine, Alexander Maiwald, Sven Gläser (+1 others)
2021 Respiration  
<b><i>Introduction:</i></b> Chronic obstructive pulmonary disease (COPD) is one of the most common chronic diseases associated with high mortality. Previous studies suggested a prognostic role for peak oxygen uptake (VO<sub>2</sub>peak) assessed during cardiopulmonary exercise testing (CPET) in patients with COPD. However, most of these studies had small sample sizes or short follow-up periods, and despite their relevance, CPET parameters are not included in the Global Initiative for Chronic
more » ... tructive Lung Disease (GOLD) tool for assessment of severity. <b><i>Objectives:</i></b> We therefore aimed to assess the prognostic value of CPET parameters in a large cohort of outpatients with COPD. <b><i>Methods:</i></b> In this retrospective, multicentre cohort study, medical records of patients with COPD who underwent CPET during 2004–2017 were reviewed and demographics, smoking habits, GOLD grade and category, exacerbation frequency, dyspnoea score, lung function measurements, and CPET parameters were documented. Relationships with survival were evaluated using Kaplan-Meier analysis, Cox regression, and receiver operating characteristic (ROC) curves. <b><i>Results:</i></b> Of a total of 347 patients, 312 patients were included. Five-year and 10-year survival probability was 75% and 57%, respectively. VO<sub>2</sub>peak significantly predicted survival (hazard ratio: 0.886 [95% confidence interval: 0.830; 0.946]). The optimal VO<sub>2</sub>peak threshold for discrimination of 5-year survival was 14.6 mL/kg/min (area under ROC curve: 0.713). Five-year survival in patients with VO<sub>2</sub>peak &#x3c;14.6 mL/kg/min versus ≥ 14.6 mL/kg/min was 60% versus 86% in GOLD categories A/B and 64% versus 90% in GOLD categories C/D. <b><i>Conclusions:</i></b> We confirm that VO<sub>2</sub>peak is a highly significant predictor of survival in COPD patients and recommend the incorporation of VO<sub>2</sub>peak into the assessment of COPD severity.
doi:10.1159/000519750 pmid:34802005 fatcat:lpbx636tkbejdoyfvvcfjgnlfm

Monitoring and Modeling the Terrestrial System from Pores to Catchments: The Transregional Collaborative Research Center on Patterns in the Soil–Vegetation–Atmosphere System

Clemens Simmer, Insa Thiele-Eich, Matthieu Masbou, Wulf Amelung, Heye Bogena, Susanne Crewell, Bernd Diekkrüger, Frank Ewert, Harrie-Jan Hendricks Franssen, Johan Alexander Huisman, Andreas Kemna, Norbert Klitzsch (+16 others)
2015 Bulletin of The American Meteorological Society - (BAMS)  
BACKGROUND. State predictions for terrestrial systems are usually performed by means of numerical process models, which consider all compartments. However, it is unclear to what extent system heterogeneity must be considered for a particular set of conditions and for different types of model predictions. Numerical process models of the terrestrial system usually consider three vertically stacked mediarepresenting the subsurface, including ground and surface water; vegetation; and
more » ... are typically coded in three separate compartment models. These compartment models interact at their
doi:10.1175/bams-d-13-00134.1 fatcat:gu3u2w7cbvf75f77irwhir3aqm

Evaluation of the RPM-CN Approach for Broadband Combustion Noise Prediction

Bernd Mühlbauer, Roland Ewert, Oliver Kornow, Jan Boyde, Berthold Noll, Jan Delfs, Manfred Aigner
2009 15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference)   unpublished
In this work the Random Particle-Mesh (RPM) method introduced by Ewert 13-16 to model vortex sound sources for airframe and jet-noise is adapted to reconstruct stochastic fluctuating combustion noise sources  ...  RPM method The Random Particle-Mesh (RPM) method was introduced by Ewert 13-16 as a stochastic method to generate unsteady turbulent fields with locally prescribed one-and two-point statistics, with special  ... 
doi:10.2514/6.2009-3285 fatcat:vxp2fknenfgjrjy6x2n5r5zlja

Titelei/Inhaltsverzeichnis

2005 WiSt - Wirtschaftswissenschaftliches Studium  
Bernd Schauenberg, Freiburg i. Br., Prof. Dr. Ulf Schiller, Bern, Prof. Dr. Thomas Schildbach, Passau, Prof. Dr. Manfred Steiner, Augsburg, Prof. Dr. Horst Tempelmeier, Köln, Prof. Dr.  ...  Ralf Ewert, Frankfurt (Main), Prof. Dr. Torsten J. Gerpott, Duisburg, Prof. Dr. Peter-Jürgen Jost, Koblenz, Prof. Dr. Hans-Ulrich Küpper, München, Prof. Dr. Wolfgang Kürsten, Jena, Prof. Dr. Dr. h.c.  ... 
doi:10.15358/0340-1650-2005-2-i fatcat:dy4qtdkmdfhjpjvaik3mxshwje

Page 7623 of Mathematical Reviews Vol. , Issue 94m [page]

1994 Mathematical Reviews  
Bee, WON ....0222..5 Ewert, Janina Ewert, Rainer .... Ewing, R. E. Ezau, N. V. ME MEN senktinddacdencassncaeuuiweant 46078 Fabre, Jean US GS rere Facchini, Alberto Fagin, Ronald Faglia, Giovanni ...  ...  Fischer, Bernd Fischer, Klaus G. Fishback, Paul E. .. Fisher, Brian PI EGS oc i cccsseccacscataspee 58182 Fisher, J. Chris |, eS See Fisher, Robert A.  ... 

INHALTSVERZEICHNIS

1980 Bildung und Erziehung  
J.) 355 IV Unauthenticated Download Date | 7/27/18 6:37 AM Bausteine für eine pädagogische Utopie 441 Ewert, Otto: Sdiulpsychologisdier Dienst, Schullaufbahnberatung 193 Fischer, Andreas: Schulpraxis-Gutachten  ...  Erziehungswissenschaft 324 Fremerey, Michael: Erziehung und Entwicklung als Gegenstand der deutschen Forschung 475 Frey, Karl/Wilhelm Walgenbach: Bildungsforsdiung -Retrospektive und Pro- gnose 1 Frommelt, Bernd  ... 
doi:10.7788/bue-1980-jg01 fatcat:627yi5yqozd2rcxiqmtkarbdeq

Author Index

2022 ICASSP 2022 - 2022 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)  
................................................. 761 Ebbers, Janek ................................................... 1021 Ebrahimi, Touradj ............................................ 4878 Edler, Bernd  ...  , Nicholas ............................ 6367, 6382, 6387 Evert, Eric ........................................................ 9067 Evmorfos, Spilios ............................................. 5353 Ewert  ... 
doi:10.1109/icassp43922.2022.9747046 fatcat:yunx4yqzrvepxcnhfrzw7rzama

Titelei/Inhaltsverzeichnis [chapter]

Alina Hügel
2014 Haftung von Inhabern privater Internetanschlüsse für fremde Urheberrechtsverletzungen  
, ZUM 2007, 450-456 (zit.: Ewert/Hartz, ZUM 2007) Ewert, Jonas/v.  ...  .: Bydlinski, AcP 158 (1959/1060)) Czychowski, Christian/Nordemann, Jan Bernd, Die Entwicklung der unter-und obergerichtlichen Rechtsprechung im Urheberrecht in den Jahren 2008 und 2009 Teil 2, GRUR-RR  ...  .: Hoeren, NJW 1998 Hoeren, Thomas/Sieber, Ulrich/Holznagel, Bernd (Hrsg.)  ... 
doi:10.17104/9783845263854-1 fatcat:u24oqsn7lfgmxllr7sivxmngcy

Page 6721 of Mathematical Reviews Vol. , Issue 98J [page]

1998 Mathematical Reviews  
Fritzsche, Bernd 47020 Frochaux, Etienne 22032 Frohlich, Jarg 81382 Frolov, S.  ...  Ewen, Holger Ewert, Heiko MME: aiieatarnesansivetcoeie Ezquerro, José A. .... Ezzinbi, K. Faber, Carel Fabiano, A.  ... 

Titelei/Inhaltsverzeichnis [chapter]

2005 Vahlens Kompendium der Betriebswirtschaftslehre Bd. 1  
Inhaltsverzeichnis Bandl Vorwort V Bernd Schauenberg 2. Konstitutive Entscheidungen Manfred Steiner B.  ...  Ewert M. Adressaten dieses Kompendiums sind in erster Linie Studierende wirtschaftswissen schaftIicher Studiengänge an deutschsprachigen Hochschulen.  ... 
doi:10.15358/9783800648665_1 fatcat:kcfel2biozau5eonljcfr45awu
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