Anthropocentrism, Conservatism and Green Political Thought

In this paper I will examine a number of justifications for environmental concern, and show why all except for the (broadly) anthropocentric demonstrate problematic conservative logics that incline them towards socially conservative positions. Environmentalists would do best to take up an anthropocentric, or at least anthropogenic, defence of green values if they want to pair it with a progressive social politics

Sameness, Difference and Environmental Concern in the Metaphysics and Ethics of Spinoza and Chan Buddhism

In this paper I contrast the metaphysical philosophies of Benedict de Spinoza and the ‘sudden enlightenment’ tradition of Chan Buddhism. Spinoza’s expressivist philosophy, in which everything can be conceived via a lineage of finite causes terminating in substance as a metaphysical ground of all things, emphasises the relative sameness of all entities. By contrast, Chan’s philosophy of emptiness, which rests on the dependent co-origination of all entities, renders such comparison fundamentally meaningless. Having no source beyond dependent co-origination to generate a thing’s distinct nature leads to a metaphysics in which, rather than being relatively similar or different, all things are at one and the same time absolutely the same and absolutely distinct. As a result, Spinoza grounds ethics wholly is sameness or similarity, whereas Chan transcends the dichotomy of sameness and difference and offers an environmental ethics grounded simultaneously in absolute sameness and absolute difference. As a result, in Spinoza’s case, the dissimilarity between human beings and the non-human world places limits on our concern for it. In Chan Buddhism, however, insight into the emptiness of all phenomena leads to a concern for all entities in their suchness, regardless of whether they are similar or different to human beings. As such, I argue that Chan is in a better position than Spinoza to develop a robust environmental ethic

Waveform-Diverse Stretch Processing

Stretch processing with the use of a wideband LFM transmit waveform is a commonly used technique, and its popularity is in large part due to the large time-bandwidth product that provides fine range resolution capabilities for applications that require it. It allows pulse compression of echoes at a much lower sampling bandwidth without sacrificing any range resolution. Previously, this technique has been restrictive in terms of waveform diversity because the literature shows that the LFM is the only type of waveform that will result in a tone after stretch processing. However, there are also many examples in the literature that demonstrate an ability to compensate for distortions from an ideal LFM waveform structure caused by various hardware components in the transmitter and receiver. This idea of compensating for variations is borrowed here, and the use of nonlinear FM (NLFM) waveforms is proposed to facilitate more variety in wideband waveforms that are usable with stretch processing. A compensation transform that permits the use of these proposed NLFM waveforms replaces the final fast Fourier transform (FFT) stage of the stretch processing configuration, but the rest of the RF receive chain remains the same. This modification to the receive processing structure makes possible the use of waveform diversity for legacy radar systems that already employ stretch processing. Similarly, using the same concept of compensating for distortions to the LFM structure along with the notion that a Fourier transform is essentially the matched filter bank for an LFM waveform mixed with an LFM reference, a least-squares based mismatched filtering (MMF) scheme is proposed. This MMF could likewise be used to replace thefinal FFT stage, and can also facilitate the application of NLFM waveforms to legacy radar systems. The efficacy of these filtering approaches (compensation transform and least-squares based MMF) are demonstrated in simulation and experimentally using open-air measurements and are applied to different scenarios of NLFM waveform to assess the results and provide a means of comparison between the two techniques