A perfectly matched layer (PML) absorbing material composed of a uniaxial anisotropic material is presented for the truncation of finite-difference time-domain (FDTD) lattices. It is shown that the uniaxial PML material formulation is mathematically equivalent to the perfectly matched layer method published by Berenger (see J. Computat. Phys., Oct. 1994). However, unlike Berenger's technique, the uniaxial PML absorbing medium presented in this paper is based on a Maxwellian formulation. Numerical examples demonstrate that the FDTD implementation of the uniaxial PML medium (...) is stable, equal in effectiveness as compared to Berenger's PML medium, while being more computationally efficient. (shrink)

The author argues that the so-called “basic emotions”, such as happiness, fear or anger, are in fact cultural artifacts of the English language, just as the Ilongot concept of liget, or the Ifaluk concept of song, are the cultural artifacts of Ilongot and Ifaluk. It is therefore as inappropriate to talk about human emotions in general in terms of happiness, fear, or anger as it would be to talk about them in terms of liget or song. However, this does not (...) mean that we cannot penetrate into the emotional world of speakers of languages other than our own. Nor does it mean that there cannot be any universal human emotions. Universality of emotions is an open issue which requires further investigation. For this further investigation to be fully productive, it has to be undertaken from a universal, language and culture-independent perspective; and it has to be carried out in a universalist framework that is language and culture-independent. The author proposes for this purpose the “natural semantic metalanguage” based on universal (or near-universal) semantic primitives (or near-primitives), developed over two decades by herself and colleagues, and she argues that the use of this metalanguage facilitates such a perspective and offers such a framework. (shrink)

Building on the author's earlier work, this paper argues that language is a key issue in understanding human emotions and that treating English emotion terms as valid analytical tools continues to be a roadblock in the study of emotions. Further, it shows how the methodology developed by the author and colleagues, known as NSM (from Natural Semantic Metalanguage), allows us to break free of the “shackles” (Barrett, 2006) of English psychological terms and explore human emotions from a culture-independent perspective. The (...) use of NSM makes it possible to study human emotions from a genuinely cross-linguistic and cross-cultural, as well as a psychological, perspective and thus “opens up new possibilities for the scientific understanding of subjectivity and psychological experience” (Goddard, 2007). (shrink)

Experiences of emotion are content-rich events that emerge at the level of psychological description, but must be causally constituted by neurobiological processes. This chapter outlines an emerging scientific agenda for understanding what these experiences feel like and how they arise. We review the available answers to what is felt (i.e., the content that makes up an experience of emotion) and how neurobiological processes instantiate these properties of experience. These answers are then integrated into a broad framework that describes, in psychological (...) terms, how the experience of emotion emerges from more basic processes. We then discuss the role of such experiences in the economy of the mind and behavior. (shrink)