Earthsongs: ecopoetics, Heidegger and dwelling

This paper discusses the notion of ecopoetics in relation to the work of Martin Heidegger and his concept of dwelling. Our aim, broadly stated, is to respond to the question: "What frame of mind could bring about sustainability - and how might we develop it?" In the first part of the paper, we comment on Jonathan Bate's notion of ecopoetics and his discussion of Heidegger. Crucial here is the question of whether we can ever approach Nature in an non-ideological way or are all attempts to capture Nature, theoretically or poetically or narratively, nothing more than our own peculiar appropriation of it? Ecopoetics might be conceived as a response to this question, although we dispute Bate's view. In the second part of the paper, following Micheal Haar's perceptive reading, we elaborate the four senses that Heidegger gives to Nature, and in the third section, we make some concluding comments about the notion of sustainability that might be explicated in relation to Heidegger's four senses of Nature

Solving Vertical Transport and Chemistry in Air Pollution Models.

For the time integration of stiff transport-chemistry problems from air pollution modelling, standard ODE solvers are not feasible due to the large number of species and the 3D nature. The popular alternative, standard operator splitting, introduces artificial transients for short-lived species. This complicates the chemistry solution, easily causing large errors for such species. In the framework of an operational global air pollution model, we focus on the problem formed by chemistry and vertical transport, which is based on diffusion, cloud-related vertical winds, and wet deposition. Its specific nature leads to full Jacobian matrices, ruling out standard implicit integration. We compare Strang operator splitting with two alternatives: source splitting and an (unsplit) Rosenbrock method with approximate matrix factorization, all having equal computational cost. The comparison is performed with real data. All methods are applied with half-hour time steps, and give good accuracies. Rosenbrock is the most accurate, and source splitting is more accurate than Strang splitting. Splitting errors concentrate in short-lived species sensitive to solar radiation and species with strong emissions and depositions

Mixed H2/H∞H_2/H_\infty control in a stochastic framework

This paper deals with a mixture of H_2 and H_\infty. We have two inputs and one output. One input signal is a white noise stochastic process, and represents errors e.g. resulting from measurement noise. The other input has a more deterministic character. If one has a reference signal (e.g. a step) as input one can not model this as white noise, but it fits nicely into this new class of inputs. The objective is to minimize the effect of these exogenuous signals on the output ofthe system. We define a cost function which enables us to combine the structural difference between these two exogenuous inputs. The analysis of this function leads to a standard H_\infty Riccati equation. We will motivate this cost function by looking at two theoretical applications: the derivation of robust performance bounds and a tracking problem

The Lawyering Process: An Example of Metacognition at Its Best

This article celebrates the 25th anniversary of the publication of Gary Bellow and Bea Moulton\u27s The Lawyering Process by looking at the work from personal and theoretical perspectives. From the personal perspective, the authors discuss how The Lawyering Process influenced them as teachers and scholars. From the theoretical perspective, the authors show how the book modeled various metacognitive processes. Combining the personal with the theoretical, the article shows how The Lawyering Process challenged lawyers to be-come aware of their own thinking by demonstrating how it challenged the authors to do so