DSpace Collection:
https://dspace.lboro.ac.uk/2134/2484
2016-06-28T15:03:38Z
2016-06-28T15:03:38Z
Circle of Sarkisov links on a Fano 3-fold
Ahmadinezhad, Hamid
Zucconi, Francesco
https://dspace.lboro.ac.uk/2134/21842
2016-06-27T13:34:55Z
2016-01-01T00:00:00Z
Title: Circle of Sarkisov links on a Fano 3-fold
Authors: Ahmadinezhad, Hamid; Zucconi, Francesco
Abstract: Copyright © Edinburgh Mathematical Society 2016For a general Fano 3-fold of index 1 in the weighted projective space ℙ(1, 1, 1, 1, 2, 2, 3) we construct two new birational models that are Mori fibre spaces in the framework of the so-called Sarkisov program. We highlight a relation between the corresponding birational maps, as a circle of Sarkisov links, visualizing the notion of relations in the Sarkisov program.
Description: This paper is in closed access until 23rd Nov 2016
2016-01-01T00:00:00Z
Re-thinking science capital: the role of ‘capital’ and ‘identity’ in mediating students’ engagement with mathematically demanding programmes at university
Hernandez-Martinez, Paul
Black, Laura
https://dspace.lboro.ac.uk/2134/21830
2016-06-27T09:17:01Z
2016-01-01T00:00:00Z
Title: Re-thinking science capital: the role of ‘capital’ and ‘identity’ in mediating students’ engagement with mathematically demanding programmes at university
Authors: Hernandez-Martinez, Paul; Black, Laura
Abstract: A wide body of literature has highlighted how high achievement in mathematics in secondary school does not necessarily motivate students to both choose and succeed on mathematically demanding programmes at post compulsory level. The recent Enterprising Science project (Archer et al, 2015) and before that, the ASPIRES project (Archer et al, 2013), have both highlighted that access to science capital is perhaps more important than prior achievement in shaping students’ aspirations and their future trajectories in STEM. In this paper, we critically analyse the notion of science capital and its role in mediating students’ choice of and experience of studying mathematically demanding degree programmes at university. Drawing on data from the TransMaths project, we present two cases – Stacey and Elton – who are both enrolled on the same ‘Mathematics for Physics’ course at university. We show that although both discuss access to science capital in narrating their choice of degree, they do so in different ways and this invariably interplays with different forms of identification with ‘Mathematics for Physics’. We conclude that there is a need to re-conceptualise science capital so that the dialectic relationship between its exchange and use value is theorized more fully. Whilst some students may access science capital as a means to accumulate capital (e.g. qualifications) for its own sake (exchange value), others appear to recognize the ‘use value’ of science learning and knowledge and this produces different forms of engagement with science (and mathematics). We therefore, argue that authoring oneself in the name of a STEM identity is crucial in mediating how one perceives science capital. Finally, we argue that mathematics should be a central part of this framework since it significantly contributes to the exchange value of science as a form of capital (especially Physics) but it also offers use value in scientific labour (e.g. in modelling scientific problems).
Description: This paper is in closed access until 12 months after the conference.
2016-01-01T00:00:00Z
Comments on 'Combined effect of variable viscosity and thermal conductivity on free convection flow of a viscous fluid in a vertical channel using DTM' by J.C. Umavathi and M. Shekar
Kay, Anthony
https://dspace.lboro.ac.uk/2134/21756
2016-06-23T09:04:06Z
2017-01-01T00:00:00Z
Title: Comments on 'Combined effect of variable viscosity and thermal conductivity on free convection flow of a viscous fluid in a vertical channel using DTM' by J.C. Umavathi and M. Shekar
Authors: Kay, Anthony
Abstract: A recent paper by Umavathi and Shekar addressed an important problem in thermal convection, but is unfortunately marred by several inadequacies.
Description: Closed access for 12 months after publication.
2017-01-01T00:00:00Z
Warm discharges in cold fresh water. 2, Numerical simulation of laminar line plumes
George, Alabodite M.
Kay, Anthony
https://dspace.lboro.ac.uk/2134/21755
2016-06-23T09:02:54Z
2017-01-01T00:00:00Z
Title: Warm discharges in cold fresh water. 2, Numerical simulation of laminar line plumes
Authors: George, Alabodite M.; Kay, Anthony
Abstract: The behaviour of a discharge of warm water upwards into a homogeneous body of cold fresh water was investigated by means of a numerical model. The discharge has a parabolic velocity profile, with Reynolds number Re = 50, Prandtl number Pr = 7 and Froude number varied over the range 0:2 Fr 2:5. Water density is taken to be a quadratic function of temperature, so that an initially positively buoyant discharge will experience buoyancy reversal as it mixes with an ambient below the temperature of maximum density. The resulting plume has some similarities to a fountain resulting from injection of negatively buoyant fluid upward into a less dense ambient. The plume is initially symmetric, but then its head detaches as it approaches its maximum height. The detached head is denser than the fluid in the plume below it, and the interaction between the sinking head and the rising plume causes a sideways deflection; as this cycle is repeated, the plume displays side-to-side flapping motion and vertical bobbing. As Froude number is increased (i.e. buoyancy reduced) the growth of the plume becomes slower, but the plume eventually reaches a greater height. We obtain empirical power-law scalings for maximum height and time taken to reach that height as functions of Froude number; these scalings are simlar to those for fountains with a linear dependence of density on temperature in the very weak regime.
Description: Closed access for 12 months after publication.
2017-01-01T00:00:00Z