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Exploring negotiated determinants of product form

This paper describes work in progress exploring influences of product form in design practice based on interviews with five industrial designers in southern Sweden. Participants were asked to list and compare different designers, and to explain how their respective characteristics affected product form. The findings indicate designers as shaped by traditions and acting not only to serve their clie

Determination of over current protection thresholds for class D audio amplifiers

Monolithic class-D audio amplifiers typically feature built-in over current protection circuitry that shuts down the amplifier in case of a short circuit on the output speaker terminals. To minimize cost, the threshold at which the device shuts down must be set just above the maximum current that can flow in the loudspeaker during normal operation. The current required is determined by the complex

Current issues in pictorial semiotics. Lecture one: The Quadrature of the Hermeneutic Circle.

The first lecture will present pictorial semiotics within the framework of general semiotic theory. It will construe semiotics as a particular point of view taken on everything which is human or, more generally, endowed with life, rather than simply the continuation of the mixed or separate doctrines due to Saussure and Peirce. The historical part will describe briefly the development of pictorial

Thick screens perforated with a periodic array of apertures with arbitrary cross-section

A plane wave impinges on a perfectly conducting thick screen perforated with a periodic array of apertures with arbitrary cross-section. The transmission and reflection coefficients are determined by a mode matching technique, earlier used by other authors for the case where the apertures have the geometry of a classical waveguide. The fields outside the screen are expanded in plane waves, while t