# Chwilio Mathemateg a Ffiseg / Mathematics & Physics by Dyddiad Cyhoeddi

• (Aberystwyth University, 1962)
Some sequential sampling problems where there in one unknown parameter in a generating stochastic process are considered by Bayesian concepts with the aid of Dynamic Programming equations. Some properties of the ...
• (Aberystwyth University, 1980)
In this thesis we are concerned with the rheological behaviour of industrial liquids such as polymer solutions in complex flow situations and the possibility of predicting this behaviour. Preliminary consideration is ...
• (2000-06-27)
The magnetic field in the outer solar atmosphere is frequently distorted by flares. In some cases, a fraction of the field exhibits a rapidly damped oscillation (Schrijver et al.; Aschwanden et al.). If this is a resonating ...
• (2001-02-03)
Many traditional two-dimensional models of flares and other reconnective events rely on an X-point in the corona which collapses to form a current sheet where reconnection takes place. However, the Sun's corona is ...
• (2001-05-15)
A model is developed to describe the formation of metallic foams in which liquid drainage acts to collapse the foam before it can freeze. Numerical solution of the foam drainage equation, combined with the equations of ...
• (2001-07-01)
Abstract. X-ray bright points are small dynamic loop structures that are observed all over the solar corona. The high spatial and temporal resolution of the TRACE instrument allows bright points to be studied in much greater ...
• (EDP Sciences, 2001-10)
In the present paper the splitting of sectoral (m=+/- l) helioseismic eigenmodes (f- and p-modes) is studied in the presence of a magnetic atmosphere. The solar interior is in a steady state, with sub-photospheric plasma ...
• (University of Wales, Aberystwyth, 2002)
Foreword E L Ellis in his definitive history of the University College of Wales, Aberystwyth, bemoans the fact that the natural title for his book had been pre-empted by the 1928 publication, The College by the Sea, that ...
• (2002-04)
Small cells in an experimental sample of two-dimensional foam, such as that which is contained between two glass plates, may undergo a transition to a three-dimensional form, becoming detached from one boundary. We present ...
• (2002-04-01)
Various position sensitive readout systems for microchannel plates are considered. A discrete anode detector with 192 channels and integrated data acquisition electronics developed at the University of Wales, Aberystwyth ...
• (2002-06)
Insight into the mechanical and thermal structure of Mercury's early lithosphere has been obtained from forward modeling of the largest lobate scarp known on the planet. Our modeling indicates the structure overlies a ...
• (2002-09)
Interplanetary scintillation measurements can yield estimates of a large number of solar wind parameters,including bulk flow speed, variation in bulk velocity along the observing path through the solar wind and random ...
• (Wiley InterScience, 2003)
The first analysis of 10 yr of solar mean magnetic field data from the Birmingham Solar-Oscillations Network (BiSON) instrument at Sutherland, SA is presented. Long-period (>1 d) variations correlate well with those observed ...
• (2003)
Recent observations from TRACE in the photospheric white light channel have shown sunspots that rotate up to 200° about their umbral centre over a period of 3-5 days. The corresponding loops in the coronal fan are often ...
• (2003)
Experiments on a small cluster of bubbles in a nominally two-dimensional foam show an instability in which a topological change forces one of the bubbles to be ejected to the outside of the cluster at ap oint where this ...
• (2003)
The starting point for this article is a well-known example by M.~Renardy showing the failure of the equality $\omega(T)=s(A)$ for a first order perturbation to the wave equation, where $\omega(T)$ denotes the growth bound ...
• (2003-05-01)
This paper proves some results concerning the polar factorisation of an integrable vector-valued function $u$ into the composition $u = u^{\#} \circ s$, where $u^{\#}$ is equal almost everywhere to the gradient of a convex ...
• (2003-05-22)
A large fraction of surface extension on Mars occurred at segmented grabens having width/length ratios akin to oceanic rifts on Earth. Association with volcanic landforms such as pit craters clearly suggests interconnection ...
• (2003-09-12)
A new interatomic potential, tuned to calculate the energies and structures of nanoscale silica, is presented. The potential parameters for Si–O, O–O, and Si–Si interactions were fitted using a training set consisting of ...
• (2003-09-12)
The growth of the organic semiconductor CuPc on the InSb(111)A surface at 300 K has been studied using photoelectron spectroscopy. Core level emission data obtained using low energy synchrotron radiation reveal that the ...