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  • 1
    Electronic Resource
    Electronic Resource
    Human Motor Planning, Motor Programming, and Use of New Task-relevant Information with Different Apraxic Syndromes (1995)
    Oxford, UK : Blackwell Publishing Ltd
    European journal of neuroscience 7 (1995), S. 0 
    Details
    ISSN: 1460-9568
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Patients with ideomotor apraxia (n= 2) or ideational apraxia (n= 2) after left brain stroke and patients with constructional apraxia (n= 2) after cerebrovascular accident of the right hemisphere, as well as 16 non-brain-damaged control subjects, were given a standardized simple motor task: they were asked to make triangular arm movements of specific size, configuration and spatial orientation without visual control. Motion was analysed three-dimensionally in great detail prior to and after kinaesthetic training using a triangular stencil, and 1 day later. The experiment was conceptualized to assess three aspects of motor behaviour: (i) motor planning, operationalized as specification of content parameters of the movement as a whole; (ii) motor programming, the specification of spatiotemporal parameters of movement segments; and (iii) the ability to make use of task-relevant information provided by the training. Patients with ideational apraxia showed signs of impaired motor planning: they had difficulty in selecting the body parts to be moved, and movement concept and configurational aspects were deficient. The kinaesthetic sensorimotor training given seemed not adequate to reduce behavioural deficits. Kinematic peculiarities of patients with ideomotor apraxia can be understood as deficits in programming movement elements. Submovements were more segmented, showed irregularities as well as additional, not-requested elements. Their impairments could be reduced by task-specific sensorimotor training. Patients suffering from visuoconstructive apraxia after right brain damage might have difficulties in making use of new sensorimotor information relevant for spatial-motor aspects, as suggested by training-induced behavioural impairment with a severely constructional apraxic patient.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1460-9568.1995.tb01149.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Vibrationally resolved resonant two-photon ionization spectroscopy of the 1 ^3Σ^+ "g(b)-〉1 ^3Σ^+ "u(X) transition of Na"2
    Amsterdam : Elsevier
    Chemical Physics Letters 223 (1994), S. 546-552 
    Details
    ISSN: 0009-2614
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0009-2614(94)00492-7
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Multicenter double blind study of paroxetine and amitriptyline in elderly depressed inpatients (1995)
    Springer
    Psychopharmacology 119 (1995), S. 277-281 
    Details
    ISSN: 1432-2072
    Keywords: Paroxetine ; Selective serotonin reuptake inhibitors ; Depression ; Elderly patients ; Amitriptyline
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Paroxetine is a phenylpiperidine compound which is a selective serotonin reuptake inhibitor (SSRI). Ninety-one hospitalised patients with a major depression (DSM-III) aged 65 and over from six Austrian and one German center were entered into the study, which compared the efficacy and tolerability of paroxetine versus amitriptyline. After 6 weeks both groups showed similarly good therapeutic results. In the paroxetine group, 64.3% of the patients had a 50% or more reduction of the HAMD total score compared to 58.1% in the amitriptyline group. Side effects were distributed similarly in both groups. Patients in the paroxetine group showed a higher incidence of anxiety and agitation; anticholinergic side effects were registered more often in the amitriptyline group.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02246291
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  • 4
    Electronic Resource
    Electronic Resource
    High resolution spectroscopy of the 13Σ g + (b) ← 13Σ u + (x) transition of Na2 (1996)
    Springer
    The European physical journal 36 (1996), S. 249-256 
    Details
    ISSN: 1434-6079
    Keywords: 33.20.Kf ; 33.80.Rv ; 35.20.Sd ; 42.62.Fi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Rotational-vibrational transitions of the triplet system 13Σ g + ← 13Σ u + of the Na2 molecule have been investigated around $$\bar v = 13970 cm^{ - 1} $$ by Doppler-free polarization spectroscopy in a heat pipe and by resonant two-step photoionization in a collimated cold argon beam, seeded with sodium vapor. The fine- and hyperfine structure of the transitions is partly resolved. The analysis of the measured spectra and a theoretical discussion of the expected multiplet structure yields the rotational constantsB′ v (v′=17)=0.0866(4) cm−1 for the upper andB″ v (v″=0)=0.0533(4) cm−1 for the lower state. The difference Δb=b(3Σ u )−b(3Σ g ) of the hyperfine coupling constantsb turns out to be Δb=80 MHz.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01426410
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  • 5
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    Vertical and lateral collapse of Tharsis Tholus, Mars (2011)
    Elsevier
    In:  Earth and Planetary Science Letters, 305 (3-4). pp. 445-455.
    Details
    Publication Date: 2019-09-23
    Description: Tharsis Tholus, a more than 3.9 Ga old composite shield volcano to the east of the major Tharsis Montes, has experienced a complex history of growth and destruction. On the basis of new high resolution images we analysed the morphology as well as the tectonic structures of the Tharsis Tholus volcano in detail. From morphological data, cross-cutting relations of the surface structures, and crater modelling ages we propose a chronostratigraphy for the volcano-tectonic history of Tharsis Tholus. The strongly faulted volcano reveals two large-scale landslide events followed by two subsequent shield re-growth phases between 3.8 and 1.7 Ga and two caldera collapses. Tharsis Tholus was also affected by regional extensional tectonics between 1.7 Ga and 0.4 Ga recorded by sub-parallel sets of NE trending graben structures. The steep and up to 5.4 km high landslide scarps on Tharsis Tholus suggest deep faulting of the edifice. In order to confirm this hypothesis we used analogue sand box models in which we demonstrated that gravitational flank movement on top of weak basal substrata may have produced the deformation structures as observed on Tharsis Tholus. (C) 2011 Elsevier B.V. All rights reserved.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    DOI: 10.1016/j.epsl.2011.03.012
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 6
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    Flow and deposition of pyroclastic granular flows of the 1975 Ngauruhoe eruption, New Zealand (2006)
    In:  [Talk] In: EGU General Assembly 2006, 06.04, Vienna, Austria .
    Details
    Publication Date: 2012-02-23
    Type: Conference or Workshop Item , NonPeerReviewed
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    OceanRep: Talk
  • 7
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    Flow and deposition of pyroclastic granular flows of the 1975 Ngauruhoe eruption, New Zealand (2006)
    In:  [Talk] In: 17th International Sedimentological Congress, 28.08, Fukuoka, Japan .
    Details
    Publication Date: 2012-02-23
    Type: Conference or Workshop Item , NonPeerReviewed
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  • 8
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    Evidence for Hesperian glaciation along the Martian dichotomy boundary (2013)
    Geological Society of America (GSA)
    In: Geology
    Details
    Publication Date: 2013-06-29
    Description: Here we provide geologic and geomorphologic evidence of Hesperian glacial activity along the Martian topographic dichotomy in Aeolis Mensae. Our geologic investigation focuses on a fretted plateau unit with networks of deep, flat-bottomed valleys, some of which extend from cirque-like scarps. Based on cross-sectional elevation profiles of the valleys and the resemblance to terrestrial analogue features, we propose that these fretted terrains were dissected by outlet glaciers emanating from the dichotomy boundary. The fretted terrains are spatially and temporally linked to deposits with concentrically ridged lobate fronts, providing evidence for ductile flow along a canyon floor, similar to debris-covered glaciers found on Earth and in other glaciated regions of Mars. We estimate a minimum thickness of 1500 m for the ice cover in that region during the Hesperian, equivalent to recent mid-latitude glaciations in other parts of the dichotomy boundary. Collectively, our observations suggest that glacial activity could have been an important mechanism of modification of the topographic dichotomy boundary since the Hesperian.
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
    Published by Geological Society of America (GSA)
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  • 9
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    Flow and deposition of pyroclastic granular flows: a type example from the 1975 Ngauruhoe eruption, New Zealand (2007)
    Elsevier
    In:  Journal of Volcanology and Geothermal Research, 161 . pp. 165-186.
    Details
    Publication Date: 2017-07-24
    Description: Small-volume pyroclastic density currents (PDCs) are generated frequently during explosive eruptions with little warning. Assessing their hazard requires a physical understanding of their transport and sedimentation processes which is best achieved by the testing of experimental and numerical models of geophysical mass flows against natural flows and/or deposits. To this end we report on one of the most detailed sedimentological studies ever carried out on a series of pristine small-volume PDC deposits from the 1975 eruption of Ngauruhoe volcano, whose emplacement were also witnessed during eruption. Using high-resolution GPS surveys, a series of lateral excavations across the deposits, and bulk sedimentological analysis we constrained the geomorphology, internal structure and texture of the deposits with respect to laterally varying modes of deposition. Deposition from these PDCs began only on slopes at or around the material's angle of repose (c. 30°). In unconfined settings, the granular PDCs are interpreted to have been quasi-steady, forming sheets and lobes around the angle of repose. Where flows were confined, sheet-like proximal facies made up around 10% of the deposit volume at the angle of repose, but 90% of the material was deposited from apparently unsteady inertial granular PDCs as a distal levée-and-channel facies on slopes well below the repose angle. Hence, confined PDCs were able to travel up to 50% farther than unconfined flows. In the distal facies the deposit width is inversely correlated to the local slope, and the height of the levées (above the deposit centreline) is positively correlated with slope. Internally the deposits comprise three parts, a coarse-grained fines-free sole layer that laterally connects to levées (Zone I), an ashy matrix-supported central body (Zone II) and an overlying coarse plaster of clasts (Zone II). Trends in grain-size data suggests these zones derive from a continuous un-mixing of coarse particles from the initial bulk material by granular segregation that preferentially drives large particles to the upper free surface of the flow where they are concentrated at the front of flow before being deposited and overrun. By comparison to analogue experiments, we suggest a model of flow and deposition where the temporally and spatially varying mode of deposition is determined by the flow velocity, the local slope, the vertical velocity gradient, the velocity gradient at the free surface and the vertical deposition rate. Using this model, estimated vertical deposition rates of c. 5 cm s− 1 from the Ngauruhoe PDCs agree with those determined in laboratory experiments on inertial granular flows.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.jvolgeores.2006.12.003
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  • 10
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    Cratering on Ceres: Implications for its crust and evolution (2016)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2016-09-02
    Description: Thermochemical models have predicted that Ceres, is to some extent, differentiated and should have an icy crust with few or no impact craters. We present observations by the Dawn spacecraft that reveal a heavily cratered surface, a heterogeneous crater distribution, and an apparent absence of large craters. The morphology of some impact craters is consistent with ice in the subsurface, which might have favored relaxation, yet large unrelaxed craters are also present. Numerous craters exhibit polygonal shapes, terraces, flowlike features, slumping, smooth deposits, and bright spots. Crater morphology and simple-to-complex crater transition diameters indicate that the crust of Ceres is neither purely icy nor rocky. By dating a smooth region associated with the Kerwan crater, we determined absolute model ages (AMAs) of 550 million and 720 million years, depending on the applied chronology model.
    Keywords: Geochemistry, Geophysics, Planetary Science
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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