A5002416445- earthquake and tectonic studies
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Seismic Waves and Analysis
- Seismic Imaging and Inversion Techniques
- Natural Language Processing Techniques
- Geological and Geophysical Studies
- Earthquake Detection and Analysis
- Geological Studies and Exploration
- Topic Modeling
- Seismology and Earthquake Studies
- Geotechnical and Geomechanical Engineering
- Speech Recognition and Synthesis
- Nonlinear Dynamics and Pattern Formation
- Neural dynamics and brain function
- Geophysics and Sensor Technology
- Hydrocarbon exploration and reservoir analysis
- Geophysical Methods and Applications
- Drilling and Well Engineering
- Speech and dialogue systems
- Advanced MRI Techniques and Applications
- Advanced Neuroimaging Techniques and Applications
- stochastic dynamics and bifurcation
- Geology and Paleoclimatology Research
- Photoreceptor and optogenetics research
GFZ Helmholtz Centre for Geosciences
2011-2024
University of Augsburg
2024
Technical University of Darmstadt
2023
Freie Universität Berlin
2023
Dortmund University of Applied Sciences and Arts
2022
Friedrich Schiller University Jena
2017-2022
University of Vienna
2015-2021
Karlsruhe Institute of Technology
2020-2021
Emory University
2021
Charles University
2021
Abstract Flank instability and sector collapses, which pose major threats, are common on volcanic islands. On 22 Dec 2018, a collapse event occurred at Anak Krakatau volcano in the Sunda Strait, triggering deadly tsunami. Here we use multiparametric ground-based space-borne data to show that prior its collapse, exhibited an elevated state of activity, including precursory thermal anomalies, increase island’s surface area, gradual seaward motion southwestern flank dipping décollement. Two...
We present new seismicity images based on a two‐year seismic deployment in the Pamir and SW Tien Shan. A total of 9532 earthquakes were detected, located, rigorously assessed multistage automatic procedure utilizing state‐of‐the‐art picking algorithms, waveform cross‐correlation, multi‐event relocation. The obtained catalog provides information crustal reveals geometry internal structure Pamir‐Hindu Kush intermediate‐depth zone with improved detail resolution. relocated clearly defines at...
Utilizing seismic refraction/wide-angle reflection data from 11 approximately in-line earthquakes, 2-D P- and S-velocity models a Poisson′s ratio model of the crust uppermost mantle beneath southern Tien Shan Pamir have been derived along 400-km long main profile TIPAGE (TIen shan-PAmir GEodynamic program) project. These show that crustal thickness varies about 65.5 km close to end South through 73.6 under Lake Karakul in North Pamir, 57.7 km, 50 south northern Shan. Average P velocities are...
Abstract We report on a multi-technique analysis using publicly available data for investigating the huge, accidental explosion that struck city of Beirut, Lebanon, August 4, 2020. Its devastating shock wave led to thousands injured with more than two hundred fatalities and caused immense damage buildings infrastructure. Our combined seismological, hydroacoustic, infrasonic radar remote sensing allows us characterize source as well estimate explosive yield. The latter is determined within...
Abstract. We analyze S-receiver functions to investigate variations of lithospheric thickness below the entire region Turkey and surrounding areas. The teleseismic data used here have been compiled combining all permanent seismic stations which are open public access. obtained almost 12 000 function traces characterizing discontinuities between Moho discontinuity at 410 km depth. Common-conversion-point stacks yield well-constrained images lithosphere–asthenosphere boundary (LAB). Results...
Abstract The Cenozoic convergence between India and Asia has created Earth's thickest crust in the Pamir‐Tibet Plateau by extreme crustal shortening. Here we study structure of Pamir western Tian Shan, adjacent margins Tajik, Tarim, Ferghana Basins, Hindu Kush, using data collected temporary seismic experiments. We derive, compare, combine independent observations from P S receiver functions. obtained Moho depth varies ~40 km below basins to a double‐normal thickness 65–75 underneath Kush. A...
The stability of cortical function depends critically on proper regulation. Under conditions migraine and stroke a breakdown transmembrane chemical gradients can spread through tissue. A concomitant component this emergent spatio-temporal pattern is depolarization cells detected as slow voltage variations. propagation velocity approximately 3 mm/min indicates contribution diffusion. We propose mechanism for spreading depolarizations (SD) that rests upon nonlocal or noninstantaneous feedback...
The onset of pulse propagation is studied in a reaction-diffusion (RD) model with control by augmented transmission capability that provided either along nonlocal spatial coupling or time-delayed feedback. We show traveling pulses occur primarily as solutions to the RD equations, while changes excitability. For certain ranges parameter settings, defined weak susceptibility and moderate control, respectively, hybrid can be mapped original model. This results an effective change parameters...
Introduction. For gliomas, the goal of surgery is maximal tumour removal with preservation neurological function. We evaluated contribution combination diffusion tensor imaging-based fibre tracking (DTI-FT) pyramidal tract (PT) integrated to navigation and subcortical direct electrical stimulations (DESs) surgical outcomes. Method. Ten patients underwent for gliomas located in close relationship course PT. Preoperative DTI was performed a three-Tesla magnetic resonance scanner applying an...
ABSTRACT We study the interaction of a seismic wavefield with spherical acoustic gas‐ or fluid‐filled cavity. The intention this is to clarify whether resonances can be expected, characteristic feature that may help in detecting cavities subsurface. This important for many applications, particular detection underground nuclear explosions, which are prohibited by Comprehensive Test Ban Treaty. To calculate full from an incident plane wave interacts cavity, we considered analytic formulation...
On December 12, 2017 a devastating release and combustion of gas occurred at the Baumgarten hub in Eastern Austria, which is major European distribution node for natural gas. We have detected resulting seismo-acoustic signal on permanent temporary broadband seismic stations distances between 30 175 km from hub, most prominently 2–4 Hz range. Two distinct phase arrivals correspond to acoustic waves traveling through troposphere stratosphere. The passing cold front shortly before explosion led...
With more and meetings moving to a digital domain, meeting summarization has recently gained interest in both academic commercial research. However, prior research focuses on as an offline task, performed after the concludes. In this paper, we perform first systematic study of online summarization. For purpose, propose several policies for conducting We discuss unique challenges task compared setting define novel metrics evaluate latency partial summary quality. The experiments AutoMin...
Abstract We use local and teleseismic earthquakes to analyze shear wave splitting within the Pamir‐Hindu Kush region, north of western syntaxis India‐Asia collision zone. These two data sets allowed us map distribution azimuthal anisotropy, put constraints on depth range where it is accumulated, deduce characteristics ongoing deformation. From 1,073 SKS (core‐mantle refracted phases) measurements at 107 stations, we derived time delays 0.7–2.25 s dominantly ENE‐WSW oriented fast polarization...
Abstract On September 1st, 2018 a devastating explosion occurred on the facility of an oil refinery near Ingolstadt, Germany. We analyzed data 400 permanent and temporary seismic stations find strong seismo-acoustic signals more than 80 stations. The infrasound signal is detectable within 10–350 km from source, with 40 spatial resolution. confirm site both by arrivals. Apart P- S-waves, we identified three separate acoustic phases celerities 332, 292, 250 m/s, respectively, each which has...
ABSTRACT The mechanism that causes the rapid uplift and active magmatism of Hoh-Xil Basin in northern Tibetan Plateau hence outward growth proto-plateau is highly debated, more specifically, over relationship between deep dynamics surface uplift. Until recently remained uncovered by seismic networks due to inaccessibility. Here, based on linear arrays across Basin, we present a three-dimensional S-wave velocity (VS) model crust uppermost mantle structure beneath from ambient noise...
Abstract Polyacenaphthylen zeigt sowohl im Festzustand als auch in Lösung bei Raumtemperatur eine Excimerenfluoreszenz, die Copolymeren aus Acenaphthylen und Styrol nicht auftritt. Bei diesen erfolgt Wanderung der Anregungsenergie von den Styrol‐ zu Acenaphthylenbausteinen, so daß selbst festen mit geringem Acenaphthylengehalt Anregung Styrolbausteine nur Fluoreszenz Acenaphthylenbausteine emittiert wird. In 2‐Methyltetrahydrofuran‐Lösungen 77 298°K wird Wanderungseffekt ebenfalls, jedoch...
Ngoc-Quan Pham, Felix Schneider, Tuan-Nam Nguyen, Thanh-Le Ha, Thai Son Maximilian Awiszus, Sebastian Stüker, Alexander Waibel. Proceedings of the 17th International Conference on Spoken Language Translation. 2020.
Simultaneous machine translation systems rely on a policy to schedule read and write operations in order begin translating source sentence before it is complete. In this paper, we demonstrate the use of Adaptive Computation Time (ACT) as an adaptive, learned for simultaneous using transformer model more numerically stable alternative Monotonic Infinite Lookback Attention (MILk). We achieve state-of-the-art results terms latency-quality tradeoffs. also propose method our unsegmented input,...
Ondřej Bojar, Dominik Macháček, Sangeet Sagar, Otakar Smrž, Jonáš Kratochvíl, Peter Polák, Ebrahim Ansari, Mohammad Mahmoudi, Rishu Kumar, Dario Franceschini, Chiara Canton, Ivan Simonini, Thai-Son Nguyen, Felix Schneider, Sebastian Stüker, Alex Waibel, Barry Haddow, Rico Sennrich, Philip Williams. Proceedings of the 16th Conference European Chapter Association for Computational Linguistics: System Demonstrations. 2021.
Abstract. Site selection is a crucial part of the work flow for installing seismic stations. Here, we report preparations countrywide temporary network in Austria. We describe specific requirements multi-purpose array with 40 km station spacing that will be operative approximately three years. Reftek 151 60 s sensors and 130/130S digitizers form core instrumentation our stations which are mostly installed inside abandoned or occasionally used basements cellars. present probabilistic power...