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Viewing upcoming talks containing the keyword: 3
Speaker: Peter Skabara (Strathclyde)
Well-defined and monodisperse oligomers can be considered to be intermediate of conjugated ‘small molecules’ and polymers, and can feature the best of both sets of attributes. Precise HOMO/LUMO energy levels, high thermal stability, good solubility and excellent film-forming properties are common features that can be achieved in such materials. Moreover, the precise structure of the material is known (compared with polydisperse systems) and this makes our understanding of structure-property relationships much easier to establish.
The synthesis and properties of some monodisperse conjugated star-shaped and linear structures will be presented in this talk, along with their application in organic lasers, sensors, electrogenerated chemiluminescence, light emitting diodes and LiFi communications.
On: April 20, 2016 From: 15h30 To: 16h30View talk
History of Mathematics
Speaker: Edmund Robertson (St Andrews); Mark McCartney (Ulster)
These talks are aimed at a general audience.
The London Mathematical Society is pleased to announce that Professor Edmund F. Robertson (St Andrews) will give the inaugural Hirst Lecture at St Andrews on Wednesday 20 April 2016. Mark McCartney (University of Ulster) will give an accompanying lecture.
3.30 pm Opening of the meeting
3.45 pm Mark McCartney (Ulster)
4.45 pm Tea
5.15 pm Hirst Lecture, Edmund Robertson (St. Andrews)
6.15 pm Meeting closes.
The Hirst Lecture celebrates the joint award of the Hirst Prize & Lectureship, in the 150th Anniversary year of the London Mathematical Society, to Professor Edmund Robertson (St Andrews) and Dr John O’Connor (St Andrews) for their creation, development and maintenance of the MacTutor History of Mathematics website.
The Hirst Prize and Lectureship are named after Thomas A. Hirst, 5th President of the London Mathematical Society from 1872-1874. The prize is awarded in recognition of original and innovative work in the history of mathematics, which may be in any medium.
On: April 20, 2016 From: 15h30 To: 18h30View talk
Physics and Astronomy Colloquia
Speaker: Prof Doug Lin (University of California, Santa Cruz and Carnegie Centenary Professor, University of St Andrews)
In conjunction with Carnegie Trust for the Universities of Scotland, we are pleased to host:
Planetary astrophysics is the most rapidly advancing field in the world-wide astronomical community today. Planetary census suggests that planets, especially those similar to the Earth, are prevalent around nearby stars. The game-changing influx of data from exoplanet surveys and characterization of protostellar disks have revitalized intense efforts to understand the formation and evolution of planets including those in the Solar System and to extrapolate the ubiquity of habitable planets and the possibility of finding tell-tale signs of life on them. Emerging comparative planetology shows evidences that planets' diverse structure and kinematic properties are likely to be the byproducts of both the environment of their cradles and the long-term evolution of these complex dynamical systems. I will describe some recent paradigm shifts in the theory of planet formation, especially on the role of planet migration in their evolving natal disks, their interaction with each other and with their host stars. I will also discuss their potential implications on the origin and proliferation of life elsewhere in the Universe.
On: April 21, 2016 From: 17h15 To: 18h30View talk
Physics and Astronomy Colloquia
Speaker: Prof Doug Lin (University of Santa Cruz)
Advanced LIGO event GW150914 has been attributed to the coalescence of two black holes with masses more than double that of most known stellar black holes. Formation of such stellar black holes directly through supernova explosions requires massive, metal-deficient progenitors. This requirement and their nearly equal masses may not be compatible with its occurrence in the local Universe. I consider an alternative possibility which may lead to the robust production of binary black holes with masses up to a hundred solar masses in the proximity of active galactic nuclei (AGN's). I will describe some relevant mechanisms which are analogous to the astrophysics of planet formation. I will discuss the implications of this scenario in the context of structure and evolution of AGN disks including the cause of their super solar metallicity, duty cycle of their active phase, and the rapid growth of their central massive black holes.
On: April 22, 2016 From: 10h00 To: 11h00View talk
Speaker: D Flemming Hansen (UCL)
NMR spectroscopy is a powerful technique to characterise the structural dynamics of proteins over many time-scales. Several recently developed NMR methods to characterise protein dynamics will be presented in the talk. These include methods to characterise the structure and dynamics of low-populated and excited states of proteins, as well as methods to characterise protein side-chains dynamics and potassium binding in medium-large proteins. Applications of the recently developed methods to the histone deacetylase enzymes will also be presented.
On: April 27, 2016 From: 15h30 To: 16h30View talk
Speaker: Jim Scott (St Andrews)
Thin-film ferroelectric oxides have become in the past three years the basis of commercial memory devices in Korea, Japan, and the USA, largely for transit fare cards (brand name "Felica" -- similar to the London "oyster card") and cash machines (brand name "Edy") at ca. £100 million/year. Much of this technology was developed in my US university laboratory in the 1980s (hence unfortunately the patent royalties stopped long ago!). I will describe the solid state chemistry of this project and our present work here in the School of Chemistry on multiferroics (ferroelectric ferromagnets) that is trying to combine the best attributes of ferroelectric FRAMs with magnetic MRAMs (RAM = random access memory). The main aim is to discover or invent materials that are ferroelectric and ferromagnetic at ROOM TEMPERATURE (very rare) and are cheap and non-toxic. New favorites include hexaferrites (Ba- or SrFe12O19), gallium orthoferrite GaFeO3, and the ternary perovskites PbFe(1/2)M(1/2)O3Ta(x)Zr(1-x) [M=Ta,Nb].
On: April 29, 2016 From: 14h00 To: 15h00View talk