TY  - JOUR
A1  - Aldoretta, E. J.
A1  - St-Louis, N.
A1  - Richardson, N. D.
A1  - Moffat, Anthony F. J.
A1  - Eversberg, T.
A1  - Hill, G. M.
A1  - Shenar, Tomer
A1  - Artigau, E.
A1  - Gauza, B.
A1  - Knapen, J. H.
A1  - Kubat, Jiří
A1  - Kubatova, Brankica
A1  - Maltais-Tariant, R.
A1  - Munoz, M.
A1  - Pablo, H.
A1  - Ramiaramanantsoa, T.
A1  - Richard-Laferriere, A.
A1  - Sablowski, D. P.
A1  - Simon-Diaz, S.
A1  - St-Jean, L.
A1  - Bolduan, F.
A1  - Dias, F. M.
A1  - Dubreuil, P.
A1  - Fuchs, D.
A1  - Garrel, T.
A1  - Grutzeck, G.
A1  - Hunger, T.
A1  - Kuesters, D.
A1  - Langenbrink, M.
A1  - Leadbeater, R.
A1  - Li, D.
A1  - Lopez, A.
A1  - Mauclaire, B.
A1  - Moldenhawer, T.
A1  - Potter, M.
A1  - dos Santos, E. M.
A1  - Schanne, L.
A1  - Schmidt, J.
A1  - Sieske, H.
A1  - Strachan, J.
A1  - Stinner, E.
A1  - Stinner, P.
A1  - Stober, B.
A1  - Strandbaek, K.
A1  - Syder, T.
A1  - Verilhac, D.
A1  - Waldschlaeger, U.
A1  - Weiss, D.
A1  - Wendt, A.
T1  - An extensive spectroscopic time series of three Wolf-Rayet stars - I. The lifetime of large-scale structures in the wind of WR 134
JF  - Monthly notices of the Royal Astronomical Society
N2  - During the summer of 2013, a 4-month spectroscopic campaign took place to observe the variabilities in three Wolf-Rayet stars. The spectroscopic data have been analysed for WR 134 (WN6b), to better understand its behaviour and long-term periodicity, which we interpret as arising from corotating interaction regions (CIRs) in the wind. By analysing the variability of the He ii lambda 5411 emission line, the previously identified period was refined to P = 2.255 +/- 0.008 (s.d.) d. The coherency time of the variability, which we associate with the lifetime of the CIRs in the wind, was deduced to be 40 +/- 6 d, or similar to 18 cycles, by cross-correlating the variability patterns as a function of time. When comparing the phased observational grey-scale difference images with theoretical grey-scales previously calculated from models including CIRs in an optically thin stellar wind, we find that two CIRs were likely present. A separation in longitude of Delta I center dot a parts per thousand integral 90A degrees was determined between the two CIRs and we suggest that the different maximum velocities that they reach indicate that they emerge from different latitudes. We have also been able to detect observational signatures of the CIRs in other spectral lines (C iv lambda lambda 5802,5812 and He i lambda 5876). Furthermore, a DAC was found to be present simultaneously with the CIR signatures detected in the He i lambda 5876 emission line which is consistent with the proposed geometry of the large-scale structures in the wind. Small-scale structures also show a presence in the wind, simultaneously with the larger scale structures, showing that they do in fact co-exist.
KW  - instabilities
KW  - methods: data analysis
KW  - techniques: spectroscopic
KW  - stars: individual: WR 134
KW  - stars: massive
KW  - stars: Wolf-Rayet
Y1  - 2016
U6  - https://doi.org/10.1093/mnras/stw1188
SN  - 0035-8711
SN  - 1365-2966
VL  - 460
SP  - 3407
EP  - 3417
PB  - Oxford Univ. Press
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Cuzzi, Jeff N.
A1  - Burns, Joseph A.
A1  - Charnoz, Sébastien
A1  - Clark, Roger N.
A1  - Colwell, Josh E.
A1  - Dones, Luke
A1  - Esposito, Larry W.
A1  - Filacchione, Gianrico
A1  - French, Richard G.
A1  - Hedman, Matthew M.
A1  - Kempf, Sascha
A1  - Marouf, Essam A.
A1  - Murray, Carl D.
A1  - Nicholson, Phillip D.
A1  - Porco, Carolyn C.
A1  - Schmidt, Jürgen
A1  - Showalter, Mark R.
A1  - Spilker, Linda J.
A1  - Spitale, Joseph N.
A1  - Srama, Ralf
A1  - Sremcević, Miodrag
A1  - Tiscareno, Matthew Steven
A1  - Weiss, John
T1  - An evolving view of Saturn's dynamic rings
N2  - We review our understanding of Saturn's rings after nearly 6 years of observations by the Cassini spacecraft. Saturn's rings are composed mostly of water ice but also contain an undetermined reddish contaminant. The rings exhibit a range of structure across many spatial scales; some of this involves the interplay of the fluid nature and the self-gravity of innumerable orbiting centimeter- to meter-sized particles, and the effects of several peripheral and embedded moonlets, but much remains unexplained. A few aspects of ring structure change on time scales as short as days. It remains unclear whether the vigorous evolutionary processes to which the rings are subject imply a much younger age than that of the solar system. Processes on view at Saturn have parallels in circumstellar disks.
Y1  - 2010
UR  - http://www.sciencemag.org/
U6  - https://doi.org/10.1126/science.1179118
SN  - 0036-8075
ER  - 
TY  - JOUR
A1  - Weiß, E.
A1  - Buchholz, Ingeborg
A1  - Schweigert, Florian J.
T1  - Veränderungen in der Plasmakonzentration von Vitamin A, Vitamin E und beta-Karotin bei Polytraumatisierten und Patienten mit Orteitis in Abhängigkeit vom Krankheitsverlauf
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Achilles, E. I. S.
A1  - Fink, G. R.
A1  - Fischer, Martin H.
A1  - Dovern, A.
A1  - Held, A.
A1  - Timpert, D. C.
A1  - Schroeter, C.
A1  - Schuetz, K.
A1  - Kloetzsch, C.
A1  - Weiss, P. H.
T1  - Effect of meaning on apraxic finger imitation deficits
JF  - Neuropsychologia : an international journal in behavioural and cognitive neuroscience
N2  - Apraxia typically results from left-hemispheric (LH), but also from right-hemispheric (RH) stroke, and often impairs gesture imitation. Especially in LH stroke, it is important to differentiate apraxia-induced gesture imitation deficits from those due to co-morbid aphasia and associated semantic deficits, possibly influencing the imitation of meaningful (MF) gestures. To explore this issue, we first investigated if the 10 supposedly meaningless (ML) gestures of a widely used finger imitation test really carry no meaning, or if the test also contains MF gestures, by asking healthy subjects (n=45) to classify these gestures as MF or ML. Most healthy subjects (98%) classified three of the 10 gestures as clearly MF. Only two gestures were considered predominantly ML. We next assessed how imitation in stroke patients (255 LH, 113 RH stroke) is influenced by gesture meaning and how aphasia influences imitation of LH stroke patients (n=208). All patients and especially patients with imitation deficits (17% of LH, 27% of RH stroke patients) imitated MF gestures significantly better than ML gestures. Importantly, meaningfulness-scores of all 10 gestures significantly predicted imitation scores of patients with imitation deficits. Furthermore, especially in LH stroke patients with imitation deficits, the severity of aphasia significantly influenced the imitation of MF, but not ML gestures. Our findings in a large patient cohort support current cognitive models of imitation and strongly suggest that ML gestures are particularly sensitive to detect imitation deficits while minimising confounding effects of aphasia which affect the imitation of MF gestures in LH stroke patients. (C) 2015 Elsevier Ltd. All rights reserved.
KW  - Apraxia
KW  - Meaning
KW  - Cognitive models of imitation
Y1  - 2016
U6  - https://doi.org/10.1016/j.neuropsychologia.2015.12.022
SN  - 0028-3932
SN  - 1873-3514
VL  - 82
SP  - 74
EP  - 83
PB  - Elsevier
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Ou, Qi
A1  - Daout, Simon
A1  - Weiss, Jonathan R.
A1  - Shen, Lin
A1  - Lazecky, Milan
A1  - Wright, Tim J.
A1  - Parsons, Barry E.
T1  - Large-Scale interseismic strain mapping of the NE Tibetan Plateau from Sentinel-1 Interferometry
JF  - Journal of geophysical research : Solid earth
N2  - The launches of the Sentinel-1 synthetic aperture radar satellites in 2014 and 2016 started a new era of high-resolution velocity and strain rate mapping for the continents. However, multiple challenges exist in tying independently processed velocity data sets to a common reference frame and producing high-resolution strain rate fields. We analyze Sentinel-1 data acquired between 2014 and 2019 over the northeast Tibetan Plateau, and develop new methods to derive east and vertical velocities with similar to 100 m resolution and similar to 1 mm/yr accuracy across an area of 440,000 km(2). By implementing a new method of combining horizontal gradients of filtered east and interpolated north velocities, we derive the first similar to 1 km resolution strain rate field for this tectonically active region. The strain rate fields show concentrated shear strain along the Haiyuan and East Kunlun Faults, and local contractional strain on fault junctions, within the Qilianshan thrusts, and around the Longyangxia Reservoir. The Laohushan-Jingtai creeping section of the Haiyuan Fault is highlighted in our data set by extremely rapid strain rates. Strain across unknown portions of the Haiyuan Fault system, including shear on the eastern extension of the Dabanshan Fault and contraction at the western flank of the Quwushan, highlight unmapped tectonic structures. In addition to the uplift across most of the lowlands, the vertical velocities also contain climatic, hydrological or anthropogenic-related deformation signals. We demonstrate the enhanced view of large-scale active tectonic processes provided by high-resolution velocities and strain rates derived from Sentinel-1 data and highlight associated wide-ranging research applications.
KW  - Sentinel-1 InSAR
KW  - interseismic strain rate
KW  - creep and unmapped faults;
KW  - hydrological uplift and subsidence
KW  - tectonic geodesy
KW  - surface velocity
KW  - mapping
Y1  - 2022
U6  - https://doi.org/10.1029/2022JB024176
SN  - 2169-9313
SN  - 2169-9356
VL  - 127
IS  - 6
PB  - American Geophysical Union
CY  - Washington
ER  -