34619
2013
2013
eng
421
431
11
6
41
article
Elsevier
London
1
--
--
--
Recording speech articulation in dialogue - evaluating a synchronized double electromagnetic articulography setup
We demonstrate the workability of an experimental facility that is geared towards the acquisition of articulatory data from a variety of speech styles common in language use, by means of two synchronized electromagnetic articulography (EMA) devices. This approach synthesizes the advantages of real dialogue settings for speech research with a detailed description of the physiological reality of speech production. We describe the facility's method for acquiring synchronized audio streams of two speakers and the system that enables communication among control room technicians, experimenters and participants. Further, we demonstrate the feasibility of the approach by evaluating problems inherent to this specific setup: The first problem is the accuracy of temporal synchronization of the two EMA machines, the second is the severity of electromagnetic interference between the two machines. Our results suggest that the synchronization method used yields an accuracy of approximately 1 ms. Electromagnetic interference was derived from the complex-valued signal amplitudes. This dependent variable was analyzed as a function of the recording status - i.e. on/off - of the interfering machine's transmitters. The intermachine distance was varied between 1 m and 8.5 m. Results suggest that a distance of approximately 6.5 m is appropriate to achieve data quality comparable to that of single speaker recordings.
Journal of phonetics
10.1016/j.wocn.2013.07.002
0095-4470
wos:2011-2013
WOS:000327914900003
Geng, C (reprint author), Univ Potsdam, Dept Linguist, Potsdam, Germany., christian.geng@uni-potsdam.de
Christian Geng
Alice Turk
James M. Scobbie
Cedric Macmartin
Philip Hoole
Korin Richmond
Alan Wrench
Marianne Pouplier
Ellen Gurman Bard
Ziggy Campbell
Catherine Dickie
Eddie Dubourg
William Hardcastle
Evia Kainada
Simon King
Robin Lickley
Satsuki Nakai
Steve Renals
Kevin White
Ronny Wiegand
Referiert
Department Linguistik
Institut für Linguistik / Allgemeine Sprachwissenschaft
46745
2017
2017
eng
154
161
8
277
article
Elsevier
San Diego
1
--
--
--
"Click" analytics for "click" chemistry - A simple method for calibration-free evaluation of online NMR spectra
Driven mostly by the search for chemical syntheses under biocompatible conditions, so called "click" chemistry rapidly became a growing field of research. The resulting simple one-pot reactions are so far only scarcely accompanied by an adequate optimization via comparably straightforward and robust analysis techniques possessing short set-up times. Here, we report on a fast and reliable calibration-free online NMR monitoring approach for technical mixtures. It combines a versatile fluidic system, continuous-flow measurement of H-1 spectra with a time interval of 20 s per spectrum, and a robust, fully automated algorithm to interpret the obtained data. As a proof-of-concept, the thiol-ene coupling between N-boc cysteine methyl ester and ally] alcohol was conducted in a variety of non-deuterated solvents while its time-resolved behaviour was characterized with step tracer experiments. Overlapping signals in online spectra during thiol-ene coupling could be deconvoluted with a spectral model using indirect hard modeling and were subsequently converted to either molar ratios (using a calibration free approach) or absolute concentrations (using 1-point calibration). For various solvents the kinetic constant k for pseudo-first order reaction was estimated to be 3.9 h(-1) at 25 degrees C. The obtained results were compared with direct integration of non-overlapping signals and showed good agreement with the implemented mass balance. (C) 2017 Elsevier Inc. All rights reserved.
Journal of magnetic resonance
10.1016/j.jmr.2017.02.018
28288418
1090-7807
1096-0856
wos:2017
WOS:000399861500020
Maiwald, M (reprint author), Bundesanstalt Mat Forsch & Prufung BAM, Richard Willstaetter Str 11, D-12489 Berlin, Germany., Michael.maiwald@bam.de
Excellence Initiative of the German Research Foundation (DFG); European
importub
2020-04-20T04:02:02+00:00
filename=package.tar
da1a241c791a01e489ab65075f602faf
Aleksandra Michalik-Onichimowska
Simon Kern
Jens Riedel
Ulrich Panne
Rudibert King
Michael Maiwald
eng
uncontrolled
NMR spectroscopy
eng
uncontrolled
Reaction monitoring
eng
uncontrolled
Automated data evaluation
eng
uncontrolled
Thiol-ene click chemistry
Institut für Chemie
Referiert
Import