Kant and the Significance of Self-Consciousness

Human beings who have mastered a natural language are self-conscious creatures: they can think, and indeed speak, about themselves in the first person. This dissertation is about the significance of this capacity: what it is and what difference it makes to our minds. My thesis is that the capacity for self-consciousness is essential to rationality, the thing that sets the minds of rational creatures apart from those of mere brutes. This, I argue, is what Kant was getting at in a famous passage of his Critique of Pure Reason, when he claimed that a representation which could not be "accompanied with the 'I think'" would be "nothing to me" as a thinking being. I call this claim the Kantian thesis. My dissertation seeks to explain and defend the Kantian thesis, to show how it entails that the advent of self-consciousness brings with it a new kind of mind, and to sketch the implications of this point for a philosophy of mind that seeks to understand the minds of rational creatures. This involves, on the one hand, an investigation of the kinds of capacities that characterize a rational creature, and, on the other hand, an argument connecting reason with self-consciousness. I show that a rational creature, in the interesting sense, is one capable of conceptual representation, and I argue that (1) to represent conceptually is to represent in a way that decouples information from any particular context or purpose, (2) this special form of representation is possible only in a creature that can reflect explicitly on grounds for judging a proposition true, and (3) to have this capacity to reflect explicitly on grounds is necessarily to have the crux of self-consciousness. If this is right, then the representations of a rational creature must differ from those of a nonrational creature not merely in complexity but in kind. The dissertation sketches the implications of this point for various forms of naturalism and reductionism in the philosophy of mind, for debates about how to explain "first person authority," and for our understanding of the sort of failure of self-consciousness involved in self-deception

In-Flow dynamics of an area-difference-energy spring-particle red blood cell model on non-uniform grids

In this paper the area-difference-energy spring-particle (ADE-SP) red blood cell (RBC) structural model developed by Chen and Boyle is coupled with a lattice Boltzmann flux solver to simulate RBC dynamics. The novel ADE-SP model accounts for bending resistance due to the membrane area difference of RBCs while the lattice Boltzmann flux solver offers reduced computational runtimes through GPU parallelisation and enabling the employment of non-uniform meshes. This coupled model is used to simulate RBC dynamics and predictions are compared with existing experimental measurements. The simulations successfully predict tumbling, tank-treading, swinging and intermittent behaviour of an RBC in shear flow, and demonstrate the capability of the model in capturing in-flow RBC behaviours

A Preconditioned Lattice Boltzmann Flux Solver for Steady Flows on Unstructured Hexahedral Grids

The lattice Boltzmann flux solver (LBFS), first introduced by Shu et al. (2014) on structured meshes, allows fluid flow problems to be solved on unstructured meshes discretised by the finite volume method. The solver calculates the macroscopic fluxes at the cell interfaces from a local reconstruction of the lattice Boltzmann solution. In this paper the LBFS is extended to three-dimensional unstructured hexahedral meshes and a preconditioned lattice Boltzmann flux solver (PLBFS) is presented. The PLBFS involves applying the preconditioning technique proposed by Guo (2004) to the LBFS and is achieved by modifying the equilibrium distribution function used to calculate the macroscopic fluxes at the cell interface. When the PLBFS is applied to steady flow problems, it is shown that convergence is significantly accelerated and the accuracy of predictions with unstructured grids is greatly improved when compared to the LBFS. This paper also introduces a strategy for choosing the optimal value of preconditioning factor with unstructured hexahedral meshes

Effects of dietary fibre and the provision of a foraging substrate on the welfare of sows in different grouping systems

End of project reportThere are no clear guidelines on how best to meet the EU legislative requirement (Council Directive 2001/88/EC) that pregnant sows and gilts should be provided with sufficient amounts of bulky or high fibre diets and high energy food to satisfy hunger and the motivation to chew. Therefore the aim of this project was to investigate the effect of increasing dietary fibre levels and providing access to a foraging substrate on the welfare of sows housed in dynamic and static groups. To achieve this a review paper was compiled and three experiments were conducted. The aim of the review paper was to assess the effectiveness of increasing dietary fibre levels on the welfare of pregnant sows. Previous research found that increasing dietary fibre levels decrease activity levels and the performance of stereotypic behaviour, and increase resting behaviour. However, high fibre diets do not appear to reduce aggression between group-housed pregnant sows. The research clearly showed that the effectiveness of high fibre diets is influenced by the source of fibre, with soluble fibres being more effective in reducing stereotypic behaviours than insoluble fibres. However the optimum fibrous ingredient, or combination of ingredients, and the optimum dietary inclusion rate for these ingredients remains unclear

Effects of husbandry and low-dose lipopolysaccharide challenge on the acute phase response of young pigs

End of project reportIn recent years, concern has grown for the welfare of domesticated animals in different production systems (Appleby and Hughes, 1997). Poor welfare can result in poor performance and productivity. However, the consumers are also requesting more welfare-friendly systems, as reflected by the importance that ‘organic’ and ‘free-range’ products have gained in our markets. Furthermore, there are ethical reasons for safeguarding the welfare of animals in our care. Thus, it is scientists’ task to be able to develop methods and techniques that can help to assess the welfare objectively. Traditionally, welfare assessment relied on the study of behaviour and the measurement of endocrine parameters. Acute phase response mediators and products, such as pro-inflammatory cytokines and acute phase proteins, emerged recently as potential indicators of infection and herd health status (Eckersall, 2000; Petersen et al., 2004). Thus, investigating the effects of husbandry and low-dose lipopolysaccharide (LPS) challenge on the acute phase response of young pigs can give valuable information on the use of these immune parameters as health and welfare indicators in pigs.Teagasc acknowledges the support of National Development Programme Funds (NDP) in the financing of this research projec

Foucault Among the Classicists, Again

Foucault’s posthumously-published late work on epimeleia heautou might inaugurate a new partnership between classicists and Foucault. This work, however, has been misconstrued in recent classical scholarship, an important instance of which I consider here. I remedy the errors of one of Foucault’s classical interpreters; diagnose the reasons for the errors; and briefly suggest the transformative potential of Foucault’s work for students of antiquity

Studies on growth rates in pigs and the effect of birth weight

End of project reportThe purpose of this study was to assess some environmental and management factors that affect growth performance on commercial pig units. In experiment 1, a survey was carried out on 22 pig units of known growth performance in south-west Ireland to compare management factors between those showing poor and good growth rates. Low growth rate appears to be due to the cumulative effect of a combination of factors. Experiment 2 was conducted to determine the effects of providing an additional feeder on performance of weaned piglets. No benefits were recorded. Feed consumed from the additional feeder was a replacement for feed that otherwise would have been consumed from the control hopper feeder. Experiment 3 was designed to determine if pig performance and efficiency of growth were affected by weight at birth and at weaning. Lightweight pigs showed inferior growth performance up to the finisher period. Although they compensated some of the inferior growth towards the time of slaughter, they never reached the weights of the heavy birth-weight animals. Males were either significantly heavier or tended to be heavier than females throughout. There was no significant difference between the sexes in the number of days to slaughter. Light and heavy pigs did not differ in the levels of IGF-1 in their blood plasma; however lightweight pigs had significantly lower IgG preweaning. Experiment 4 aimed to determine whether piglet birth weight influenced growth performance, plasma IGF-1 concentrations and muscle fibre characteristics at day 42 of life. At slaughter (Day 42) light birth weight pigs were significantly (P < 0.001) lighter. Plasma IGF-1 concentration was lower by 28% (P=0.06) in light pigs. Muscle fibre cross sectional area and total fibre number were not significantly different between groups. This study should be repeated with bigger numbers

Periodic Optical Variability of Radio Detected Ultracool Dwarfs

A fraction of very low mass stars and brown dwarfs are known to be radio active, in some cases producing periodic pulses. Extensive studies of two such objects have also revealed optical periodic variability and the nature of this variability remains unclear. Here we report on multi-epoch optical photometric monitoring of six radio detected dwarfs, spanning the $\sim$M8 - L3.5 spectral range, conducted to investigate the ubiquity of periodic optical variability in radio detected ultracool dwarfs. This survey is the most sensitive ground-based study carried out to date in search of periodic optical variability from late-type dwarfs, where we obtained 250 hours of monitoring, delivering photometric precision as low as $\sim$0.15%. Five of the six targets exhibit clear periodicity, in all cases likely associated with the rotation period of the dwarf, with a marginal detection found for the sixth. Our data points to a likely association between radio and optical periodic variability in late-M/early-L dwarfs, although the underlying physical cause of this correlation remains unclear. In one case, we have multiple epochs of monitoring of the archetype of pulsing radio dwarfs, the M9 TVLM 513-46546, spanning a period of 5 years, which is sufficiently stable in phase to allow us to establish a period of 1.95958 $\pm$ 0.00005 hours. This phase stability may be associated with a large-scale stable magnetic field, further strengthening the correlation between radio activity and periodic optical variability. Finally, we find a tentative spin-orbit alignment of one component of the very low mass binary LP 349-25.Comment: Accepted to The Astrophysical Journal; 22 pages; 12 figure

Studies on Housing of Pregnant Sows in Groups and Individually

End of Project ReportIntensive methods of sow housing and their effects on health and welfare have become a topic of intense debate. In the EU the use of tethers for pregnant sows must be phased out by 2006. At pre s e n t there are no plans to ban stalls for pregnant sows. In 1997 the EU released a report on sow housing which was critical of stalls but did not recommend a ban (SVC, 1997). Some member countries have introduced more stringent legislation. The UK government has banned the use of both stalls and tethers for pregnant sows fro m January 1, 1999. Sweden has also imposed a ban on both stalls and tethers, and the Netherlands and De n m a rk have announced restrictions on when individual penning may be used. • This study included a comparison of pregnant gilts in loose housing (groups of 4) and in individual stalls from early pregnancy. Behaviour and skin lesions were monitored both during pregnancy and in the farrowing house. Stalled gilts tended to have higher skin lesion scores. Salivary cortisol levels in stalled gilts showed evidence of a chronic stress response. Loose gilts showed more distress when confined in the farrowing crate pre - f a r rowing than did gilts which had been housed in stalls in pregnancy. • Comparison of two group housing systems namely, groups of four with 3.0m2 per sow and groups of eight with 2.2m2 per sow showed a higher level of aggression in the larger group. Both treatments had free-access stalls with full length partitions but the groups of eight had a smaller communal lying area and they spent a greater proportion of their time in the stalls