نتایج جستجو برای: plateau

تعداد نتایج: 25904  

2004
PAOLA MOLIN FRANK J. PAZZAGLIA

We examine the tectonic geomorphology of La Sila, Calabria, southern Italy, a high-standing (1500 m) plateau surrounded by crustal extension, with map, DEM, and field data. These data are used to constrain a simple geodynamic model that describes short-wavelength deformation of the plateau rim. Topographic metrics including drainage patterns, river longitudinal profiles, and swath profiles are ...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2007
Christian R Lee James M Tepper

Plateau potentials can be elicited in nigral GABAergic neurons by injection of 500 ms depolarizing current pulses from hyperpolarized holding potentials in whole-cell recordings in vitro. In approximately one-third of these neurons, plateau potentials were observed under control conditions and could be elicited in the remaining neurons after blocking potassium conductances. Application of the L...

2007
Robert W. Bialas W. Roger Buck Paul G. Fitzgerald

The high elevation and considerable length of the Transantarctic Mountains have led to speculation about their origin. To date, no model has been able to adequately reconcile the juxtaposition of the high, curvilinear Transantarctic Mountains with the adjacent West Antarctic Rift System, a broad region of thin extended continental crust exhibiting wide rift characteristics. We present a fi rst-...

Journal: :The Journal of bone and joint surgery. American volume 2010
Qiheng Tang Yixin Zhou Dejin Yang Haijun Xu Qing Liu

BACKGROUND Long-stem tibial components are available for complex primary and revision total knee arthroplasties. Most of the stems' designs are based on anatomic data from Western populations. We conducted a morphologic study to determine the relationship of the tibial shaft to the tibial plateau in Chinese people. METHODS We included knees from fifty Chinese individuals (twenty-five females ...

Journal: :Journal of neurophysiology 1998
D J Bennett H Hultborn B Fedirchuk M Gorassini

Intracellular recordings were made from hindlimb motoneurons in decerebrate cats to study how synaptic inputs could affect the threshold at which plateau potentials are activated with current injections through the recording microelectrode in the cell body. This study was prompted by recent evidence that the noninactivating inward currents that regeneratively produce the plateau potentials aris...

باباخانی, ابوالفضل, زبرجد, سیدمجتبی, گلستانی پور, مسعود,

In this study, aluminium composite foams reinforced by different volume fractions of SiC particles as reinforcement and stabilizing agent were fabricated with the direct foaming route of melt using different contents of CaCO3 as foaming agent. The density of produced foams were measured to be from 0.38 to 0.68 g/cm3. The microstructural features and compressive properties of the AA356/SiCp comp...

Journal: :Physical review letters 2008
W K Hew K J Thomas M Pepper I Farrer D Anderson G A C Jones D A Ritchie

When a quantum wire is weakly confined, a conductance plateau appears at e;{2}/h with decreasing carrier density in zero magnetic field accompanied by a gradual suppression of the 2e;{2}/h plateau. Applying an in-plane magnetic field B_{ parallel} does not alter the value of this quantization; however, the e;{2}/h plateau weakens with increasing B_{ parallel} up to 9 T, and then strengthens on ...

2010
Rui Guo Fengmin Li Wenying He Sen Yang Guojun Sun

The non-parametric Mann-Kendall method and Sliding t-test were applied in this study to analyze the spatial and temporal patterns of trends of the precipitation in the Loess Plateau from 1958 to 2007. The main trends of the precipitation in this region is downward, only four upward time series have not reach the significant level. Most of the abrupt changes happened in northeast of Loess Platea...

2004
J. W. V. Storey M. C. B. Ashley M. G. Burton J. S. Lawrence

The Antarctic plateau is unlike anywhere else on earth. It is of course extremely cold and dry. However, what is not so well known is that it is also very high and that the atmosphere above the plateau is extremely calm, with very low wind speeds at all altitudes. This makes the plateau an ideal location for testing astronomical instrumentation and for exploring concepts that will later be flow...

2009
Todd A. Ehlers Christopher J. Poulsen

a r t i c l e i n f o Keywords: paleoaltimetry geodynamics paleoclimate stable isotopes Andes plateau Recent elevation reconstructions of the Andean Plateau suggest a rapid 2.5 ± 1.0 km rise of the central Andes between ~10 and 6 Ma. This rapid rise has been attributed to a catastrophic removal of a dense lithospheric mantle root beneath the Andes. However, these findings are based on the assum...

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