838 research outputs found
König von Gottes Gnaden? Der gute und der böse Monarch auf der frühmodernen Bühne in den Niederlanden bis ca. 1625 anhand der Davidspiele
König von Gottes Gnaden? Der gute und der böse Monarch auf der frühmodernen Bühne in den Niederlanden bis ca. 1625 anhand der Davidspiele
König von Gottes Gnaden? Der gute und der böse Monarch auf der frühmodernen Bühne in den Niederlanden bis ca. 1625 anhand der Davidspiele
De dramatische moord op de Vader des Vaderlands in 1584: een held in vier typen toneel in de vroegmoderne Nederlanden
Blind extraction algorithm with direct desired signal selection.
In many practical applications we are interested in the extraction of only one desired signal out of a mixture of signals. A disadvantage of most blind extraction approaches proposed in the literature is that they are inefficient in the sense that they also separate or extract undesired signals. To deal with this inefficiency we exploit an a priori guess of direction of arrival related parameters of the desired signal, which serves as a mold. Based on this mold we create linear combinations of noise-free correlation matrices that are used to construct a single matrix with a specific eigenstructure. The eigenvector that corresponds to the smallest eigenvalue of this matrix is the desired extraction filter. Finally it is shown that this approach paves the way to make the algorithm flexible in the utilization of additional a priori information
The quantification of rates of total sediment influx to Lynn Goddionduon, Gwynedd.
(i) This study uses mineral magnetic parameters (e.g. magnetic susceptibility,
saturation isothermal remanence and anhysteretic remanence) and
lithostratigraphical description to correlate a suite of sed~ent cores
sampled from a closely-meshed grid network covering the whole of a small
upland lake basin in Gwynedd, North Waleso
(ii) The core correlations are used to define three horizons within the
lake sediment deposits: (1) the Loch Lomond Stadia I Clay - early Flandrian
clay-mud contact, at the base of the Post-glacial sediment sequence. (2) A
peak in magnetic susceptibility which is identified as a concentration of
paramagnetic iron and manganese which are tentatively assumed to have entered
the lake basin in solution. (3) A peak in magnetic susceptibility
and magnetic remanence in the uppermost sections of the cores which is
identified as a concentration of ferrimagnetic material. The correlated
horizons define three contiguous layers of sediment within the lake basin.
Contour maps of the thicknesses of the sediment layers are constructed and
USed to estimate the volume of each layer.
(iii) Radiometric dating (C-14 and Cs-137) is used to estimate the ages
of the boundaries of the sediment layers, thereby enabling rates of total
sediment influx and sediment yield per unit area of the terrestrial part
of the watershed to be obtained. Sediment yield estimates of 36 kg/ha/yr,
1~6 kg/ha/yr and 263-326 kg/ha/yr were obtained for the periods (represent1ng
the duration of the deposition times of the sediment layers) 10 400-
800 bp; 800 bp-AD 1951 and AD 1951-1977, respectively.
(iv) Pollen analyses are used together with documented regional and local
?nvironmental history to provide a ccmtext for the eva'Lua.tdon of the est-
~mated rates of sediment yield. During the majority of the 10 400-800 bp
period the watershed is likely to have been occupied by relatively undisturbed
deciduous woodland, and during the 800 bp-AD 1951 period by grazed
and possibly burnt-over moorland. The sediment yield for the AD 1951-1977
period is ascribed predominantly to soil erosion resulting from a forest
:ire within the watershed in AD 1951. Comparison of the estimates of sed-
~~ent yield with those obtained using conventional geomorphological techn1ques
in watersheds under comparable forms of land-use suggests some accordance.
(v) The core correlations and sediment thickness contour maps depict the
history of the spatial pattern of sediment accumulation within the lake
baSin. The lake basin appears to have infilled asymmetrj.cal1y, with the
f?CUS of sediment accumulation having moved progressively northwards with
t1me. Marked variations in rates of sediment accumulation over short dist~
ces (tens of metres) are also evident. In contrast to the results ob-
~a~ed from other lake basins, the currently deepest part of the lake bas-
1n 1S virtually devoid of sediment. The observed patterns of sediment
accumulation are tentatively assumed to be a response to wind stress
The averaged characteristic polynomial for the Gaussian and chiral Gaussian ensembles with a source
In classical random matrix theory the Gaussian and chiral Gaussian random
matrix models with a source are realized as shifted mean Gaussian, and chiral
Gaussian, random matrices with real , complex ( and
real quaternion ) elements. We use the Dyson Brownian motion model
to give a meaning for general . In the Gaussian case a further
construction valid for is given, as the eigenvalue PDF of a
recursively defined random matrix ensemble. In the case of real or complex
elements, a combinatorial argument is used to compute the averaged
characteristic polynomial. The resulting functional forms are shown to be a
special cases of duality formulas due to Desrosiers. New derivations of the
general case of Desrosiers' dualities are given. A soft edge scaling limit of
the averaged characteristic polynomial is identified, and an explicit
evaluation in terms of so-called incomplete Airy functions is obtained.Comment: 21 page
Discovery of an aborted reversal (geomagnetic excursion) in the Late Pleistocene sediments of Pinjor Dun, NW Himalaya
We report here the occurrence of an aborted reversal (geomagnetic excursion) in the Late Pleistocene sediments of Pinjor Dun near Chandigarh, NW Himalaya. The event discovered at ~697.5 cm level from the base of Kiratpur section corresponds to the OSL date of 40±5 Ka coinciding with the Laschamp excursion and palaeointensity minima elsewhere. The Pinjor Dun sediments are deposited at a high rate of sedimentation that enables quite enlarged records of remanent geomagnetic field, hence suitable for further high resolution study of the excursion (under progress) to extend its utility as a stratigraphic marker in the Quaternary sediments at the foothills of the Himalaya
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