2,455 research outputs found
Modular Frobenius manifolds and their invariant flows
The space of Frobenius manifolds has a natural involutive symmetry on it:
there exists a map which send a Frobenius manifold to another Frobenius
manifold. Also, from a Frobenius manifold one may construct a so-called almost
dual Frobenius manifold which satisfies almost all of the axioms of a Frobenius
manifold. The action of on the almost dual manifolds is studied, and the
action of on objects such as periods, twisted periods and flows is studied.
A distinguished class of Frobenius manifolds sit at the fixed point of this
involutive symmetry, and this is made manifest in certain modular properties of
the various structures. In particular, up to a simple reciprocal
transformation, for this class of modular Frobenius manifolds, the flows are
invariant under the action of $I\,.
Couplings and spectra in modular inflation
We analyze how the spectrum of perturbations produced in a multi-component
modular inflation model proposed by Kadota and Stewart depends on couplings
between the two moduli. Although some simple direct couplings give essentially
the same results as the original model, , simple
indirect couplings produce a power law spectrum, ,
which can naturally be close to scale invariant.Comment: 11 pages, format changed, some corrections of formula
Transgender Healthcare Teaching in the Undergraduate Medical School Curriculum
With increasing recognition of the diverse and specific needs of transgender individuals in a health care setting, lack of knowledge, poor attitudes and prejudice towards transgender patients can result in this population being afraid to access medical care. Educating medical students early in their career in a sensitive and inclusive manner could help change these attitudes. It has been shown that medical undergraduates and post-graduates often feel unprepared or uncomfortable in caring for transgender patients due to lack of training and experience2-4. The aim of this study was to address this through introduction of basic transgender healthcare education into the University of Glasgow undergraduate medical curriculum, with the goal of implementing further interactive and fully inclusive teaching
Assessing the potential for reopening a building stone quarry : Newbigging Sandstone Quarry, Fife
Newbigging Sandstone Quarry in Fife is one of a number of former quarries in the Burntisland-
Aberdour district which exploited the pale-coloured Grange Sandstone from Lower
Carboniferous rocks. The quarry supplied building stone from the late 19th century, working
intermittently from 1914 until closure in 1937, and again when reopened in the 1970s to the
1990s. The stone was primarily used locally and to supply the nearby markets in the Scottish
Central Belt.
Historical evidence indicates that prior to sandstone extraction, the area was dominated by largescale
quarrying and mining of limestone, and substantial sandstone quarrying is likely to have
begun after the arrival of the main railway line in 1890. It is probable that removal of the
sandstone was directly associated with limestone exploitation, and that the quarried sandstone
was effectively a by-product of limestone production. Sandstone extraction was probably viable
due to the existing limestone quarry infrastructure (workforce, equipment, transportation) and the
high demand for building stone in Central Scotland in the late 19th century.
The geology within Newbigging Sandstone Quarry is dominated by thick-bedded uniform
sandstone with a wide joint spacing, well-suited for obtaining large blocks. However, a
mudstone (shale) band is likely to be present within a few metres of the principal (north) face of
the quarry, around which the sandstone bed thickness and quality is likely to decrease. The
mudstone bed forms a plane sloping at a shallow angle to the north, so that expansion of the
quarry in this direction is likely to encounter a considerable volume of poor quality stone.
Additionally, an east-west trending fault is present approximately 100 metres north of the quarry
face, which is also likely to be associated with poor quality (fractured) stone
Debt and credit in early modern Scotland: the Grandtully Estates 1650-1765
This thesis examines the significance and function of
debt and credit in the Scottish economy during the latter
half of the seventeenth and first half of the eighteenthcentury.
Part I discusses the nature of debt/credit transactions
and relationships and introduces the classification model
formulated as the basis for analysis of the data. There
follows a consideration of several aspects of the development
of credit facilities in the Scottish economy.
This section is intended to provide a backdrop for the
detailed local analysis which follows. A broad division
of the various components of the subject into procedural
and structural elements - Instruments of Exchange and
Indebtedness in Society enabled a picture of the
Scottish approach to debt to be constructed. The role of
credit in the lives of the peasantry and the landowning
classes is discussed with emphasis being given to its
significance amongst the rural population.
Three spheres of exchange are identified, questions are
posed and hypotheses formulated: the most fundamental
being the proposition that the need for credit was not
merely a reflection of liquidity crises, but that Scotland's
rural economy had developed an overlay of sophistication
which enabled credit facilities to function as
a means of increasing capital. Finally, with particular
reference to the function of Sanctuary, this section
examines the unique approach of the legislature, and
people of Scotland, to the whole subject of debt and
indebtedness thereby completing an overview of debt in
early modern Scotland.
Part II begins with a description of the Grandtully
Estates as a source base and outlines their geographical
and economic characteristics. This in turn provides a
backdrop for the last section of the thesis which is a
case-study of the peasant credit market on these estates.
There follows an examination of the source material
Small Claims Commissary Court Processes, Testamentary
material and Estate Records. The function, effects and
limitations of the various legal institutions, particularly
the Dunkeld Commissary Court, in which the data
were recorded are considered. Then the data themselves
are analysed using the classification model and by
dividing them on the basis of their social and geographical
structures. Various hypotheses which were set out in
the foregoing sections are tested and the function,
necessity and ubiquity of small debts in that society are
described and, at least in part, explained
Sharp-edged geometric obstacles in microfluidics promote deformability-based sorting of cells
Sorting cells based on their intrinsic properties is a highly desirable
objective, since changes in cell deformability are often associated with
various stress conditions and diseases. Deterministic lateral displacement
(DLD) devices offer high precision for rigid spherical particles, while their
success in sorting deformable particles remains limited due to the complexity
of cell traversal in DLDs. We employ mesoscopic hydrodynamics simulations and
demonstrate prominent advantages of sharp-edged DLD obstacles for probing
deformability properties of red blood cells (RBCs). By consecutive sharpening
of the pillar shape from circular to diamond to triangular geometry, a
pronounced cell bending around an edge is achieved, serving as a deformability
sensor. Bending around the edge is the primary mechanism, which governs the
traversal of RBCs through such DLD device. This strategy requires an
appropriate degree of cell bending by fluid stresses, which can be controlled
by the flow rate, and exhibits good sensitivity to moderate changes in cell
deformability. We expect that similar mechanisms should be applicable for the
development of novel DLD devices that target intrinsic properties of many other
cells.Comment: 16 pages, 9 figure
Draft genome sequence of the Streptococcus pneumoniae Avery strain A66
We have used HiSeq 2000 technology to generate a draft genome sequence of Streptococcus pneumoniae strain A66. This is a common study strain used in investigations of pneumococcal bacterium-host interactions and was used in the seminal genetic studies of Avery et al
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