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Concepts Enacted: Confronting the Obstacles and Paradoxes Inherent in Pursuing a Scientific Understanding of the Building Blocks of Human Thought

This thesis confronts a fundamental shortcoming in cognitive science research: a failure to be explicit about the theory of concepts underlying cognitive science research and a resulting failure to justify that theory philosophically or otherwise. It demonstrates how most contemporary debates over theories of concepts divide over whether concepts are best understood as (mental) representations or

The Cyclic Prefix of OFDM/DMT - An Analysis

We address the impact of a too short cyclic prefix on multicarrier systems such as orthogonal frequency division multiplexing (OFDM) and discrete multitone (DMT). The main result is that the intersymbol interference (ISI) and intercarrier interference (ICI) may be spectrally concentrated and analytical expressions showing this are given. A practical implication is, e.g., that the cyclic prefix in

Aerosol Properties and Unattached Fraction of Radon Daughters Close to the Human Face

A humanoid dummy inside a well controlled radon exposure chamber (volume=20m3) was used to investigate the properties of an aerosol close to, and far away from the human face, respectively. Rn222 and a NaCl aerosol (geometric mean diameter=86 nm, concentration ( 5000 cm-3 was added to the room. The size distribution of the passive aerosol and the unattached fraction of the radon progeny were measu

Probing Electron Correlation on the Attosecond Timescale

Popular Abstract in English Imagine you are sunbathing on a sandy beach, while reading the latest Dan Brown book. Once the book is finished, you look at the waves and notice that in one place, they decelerate and become large. Excited by your reading, you imagine that beneath those larger waves there is a ship containing a treasure in it (most likely sunk by the Illuminati during World War II). BuThis thesis describes how photoemission stimulated by an attosecond pulse train (APT) can be used to extract information on electron correlation in simple quantum systems such as atoms. The emission of the electron by an APT induces a reorganization of the electrons remaining in the ion core. This reorganization causes a change in the trajectory of the emitted electron. An infrared (IR) field is u

Disposal Behaviour and Local Support Systems

Disposal behaviour represent the last phase in the consumption cycle. From an environmental point of view it is extremely important to know the factors behind individual behaviour in waste handling. There are several aspects of interest, for example willingness of waste separation and re-use of products. The aim of this article is to analyse the importance of environmental concern, disposal behavi