176 research outputs found
Subgrade geology beneath railways in Manchester
It is not sufficient to identify fine-grained soils, only, as locations for potential subgrade problems as could be done using a traditional 2D geological map. More information is required about the geological structure, lithological variability, mineralogy, moisture content and geotechnical properties of the soil, much of which can be supplied by modern 3D geospatial databases. These databases can be interrogated at key depths to show the wide variability of geological materials and conditions beneath the ground surface. Geological outcrop and thickness of bedrock an superficial deposits (soils), plus the permeability and water table level are predicted from the Manchester geospatial model that is based on 6500 borehole records. Geological sections along railway routes are modelled and the locations of problem soils such as alluvium, till and glaciolacustrine deposits at outcrop and shallow subcrop are identified. Spatial attribution of geotechnical data and simple methods to recast sections in engineering geological terms are demonstrated
Model metadata report for Manchester and Salford, NW England
This report describes the creation of a 3D geological model of natural and artificial superficial
deposits in Manchester and Salford, NW England. The Manchester and Salford model forms part
of the Lower Mersey Corridor, NW England. The Lower Mersey Corridor includes models
within the region comprising:
Manchester-Salford
Warrington
Liverpool
Irlam
The location of the geological models is shown in Figure 1 and the spacing of cross-sections is
shown in Figure 2.
Figure 1 Location of Manchester and Salford 3D geological model and its relationship to
others in the Lower Mersey Corridor area of NW England.
The 3D models include natural and artificial superficial deposits. Cross-sections for Manchester
and Salford include schematic bedrock correlations for illustration only. Bedrock is not included
in the calculated mode
Integrated modelling of geoscience information to support sustainable urban planning
The provision of reliable and up-to-date geoscientific information for the urban
environment has assumed increasing importance in recent years as
legislative changes have forced developers, planning authorities and
regulators to consider more fully the implications and impact on the
environment of large-scale development initiatives. To comply with the
principles of sustainable development, developers are increasingly required to
demonstrate that proposals are based on the best possible scientific
information and analysis of risk. Nowhere is this more relevant than in the
context of urban regeneration, where planning policy guidance gives priority to
re-use of previously developed (brownfield) land. In England, brownfield sites
suitable for re-development cover an area equivalent to half the size of
London
A revised phylogenetic classification of tribe Phyllantheae (Phyllanthaceae)
The majority of tribe Phyllantheae (Phyllanthaceae) is currently placed in the paraphyletic genus Phyllanthus and discussions have persisted on how to resolve this issue. Here, we split Phyllanthus into ten monophyletic genera, which are all reinstatements of former genera, but with changes made to the circumscription and constituent species of each group. The genera Breynia, Glochidion and Synostemon were recently found to be nested within Phyllanthus and discussions ensued whether or not to subsume everything into Phyllanthus s.l. Instead of combining all these genera, we here implement the solution of splitting Phyllanthus into strictly monophyletic genera to ensure that the classification is consistent with the latest phylogenetic results. The new classification is based on a phylogenetic framework combined with differences in habit, branching type, floral, fruit and pollen morphology. With this new division of the genus Phyllanthus, tribe Phyllantheae will consist of the following 18 genera: Breynia, Cathetus, Cicca, Dendrophyllanthus, Emblica, Flueggea, Glochidion, Heterosavia, Kirganelia, Lingelsheimia, Lysiandra, Margaritaria, Moeroris, Nellica, Nymphanthus, Phyllanthus, Plagiocladus and Synostemon. As a result of the reinstated genera, five new names for illegitimate combinations or previous overlooked nomenclatural anomalies and 645 new combinations are proposed. Several keys are provided to distinguish the reinstated genera. Full species lists are given for the reinstated genera treated here except for Breynia, Synostemon and Glochidion.Plant sciencesNaturali
Large enhancement of deuteron polarization with frequency modulated microwaves
We report a large enhancement of 1.7 in deuteron polarization up to values of
0.6 due to frequency modulation of the polarizing microwaves in a two liters
polarized target using the method of dynamic nuclear polarization. This target
was used during a deep inelastic polarized muon-deuteron scattering experiment
at CERN. Measurements of the electron paramagnetic resonance absorption spectra
show that frequency modulation gives rise to additional microwave absorption in
the spectral wings. Although these results are not understood theoretically,
they may provide a useful testing ground for the deeper understanding of
dynamic nuclear polarization.Comment: 10 pages, including the figures coming in uuencoded compressed tar
files in poltar.uu, which also brings cernart.sty and crna12.sty files neede
Study of J/psi decays to Lambda Lambdabar and Sigma0 Sigma0bar
The branching ratios and Angular distributions for J/psi decays to Lambda
Lambdabar and Sigma0 Sigma0bar are measured using BESII 58 million J/psi.Comment: 11 pages, 5 figure
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