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Is Kant’s ethical theory too demanding? Do its commands ask too much of us, either by calling for self-sacrifice on particular occasions, or by pervading our lives to the extent that there is no room for permissible action? In this article, I argue that Kant’s ethics is very demanding, but not excessively so. The notion of ‘latitude’ (the idea that wide duty admits of ‘exceptions’) does not help. But we need to bear in mind (i) that moral laws are self-imposed and cannot be externally enforced; (ii) that ‘right action’ is not a category of Kantian ethics – there is a more and a less, and lack of perfection does not entail vice; and (iii) that only practice makes perfect, i.e. how much virtue can realistically be expected can vary from agent to agent. The principle that ‘ought’ is limited by ‘can’ is firmly entrenched in Kant’s ethical thought.
With fifty-four chapters charting the development of moral philosophy in the Western world, this volume examines the key thinkers and texts and their influence on the history of moral thought from the pre-Socratics to the present day. Topics including Epicureanism, humanism, Jewish and Arabic thought, perfectionism, pragmatism, idealism and intuitionism are all explored, as are figures including Aristotle, Boethius, Spinoza, Hobbes, Hume, Kant, Hegel, Mill, Nietzsche, Heidegger, Sartre and Rawls, as well as numerous key ideas and schools of thought. Chapters are written by leading experts in the field, drawing on the latest research to offer rigorous analysis of the canonical figures and movements of this branch of philosophy. The volume provides a comprehensive yet philosophically advanced resource for students and teachers alike as they approach, and refine their understanding of, the central issues in moral thought.
This comprehensive summary of the state of the art in Ultra Wideband (UWB) system engineering takes you through all aspects of UWB design, from components through the propagation channel to system engineering aspects. Mathematical tools and basics are covered, allowing for a complete characterisation and description of the UWB scenario, in both the time and the frequency domains. UWB MMICs, antennas, antenna arrays, and filters are described, as well as quality measurement parameters and design methods for specific applications. The UWB propagation channel is discussed, including a complete mathematical description together with modeling tools. A system analysis is offered, addressing both radio and radar systems, and techniques for optimization and calibration. Finally, an overview of future applications of UWB technology is presented. Ideal for scientists as well as RF system and component engineers working in short range wireless technologies.
UWB is an umbrella term that mainly indicates that a very large absolute bandwidth (Ba > 500 MHz) or a very large relative bandwidth (Br = 2[fu – fl]/[fu + fl] > 0.2) in the RF spectrum is used instantaneously by the system. With this definition, no special purpose or application and no special modulation is defined but it implies that the components of the system must be capable of handling this wide spectrum. As already mentioned in the previous chapter for RF frontends, on the whole it is the relative bandwidth that poses new challenges, so system aspects for a very large relative bandwidth are mainly discussed here. This chapter provides a mathematical description of the UWB radio channel including the antennas and measures to characterize the UWB performance of the analog frontend, including the radio channel in the frequency domain (FD) and in the time domain (TD). The chapter presents two methods to exploit an ultra-wide bandwidth: the transmission of short pulses in the baseband (impulse radio transmission), and the transmission by a multi-carrier technique called orthogonal frequency division multiplexing (OFDM). For impulse radio, the most common pulse shapes are introduced together with methods to generate them. Finally, modulation and coding techniques are considered as well as basic transmitter and receiver architectures. The coordinate system is given in Fig. 2.1.