Maurice Schellekens

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Software agents that play a role in E-commerce and E-government applications involving the Internet often contain information about the identity of their human user such as credit cards and bank accounts. This paper discusses whether this is necessary: whether human users and software agents are allowed to be anonymous under the relevant legal regimes and(More)
We have studied two-body correlations of atoms in an expanding cloud above and below the Bose-Einstein condensation threshold. The observed correlation function for a thermal cloud shows a bunching behavior, whereas the correlation is flat for a coherent sample. These quantum correlations are the atomic analog of the Hanbury Brown Twiss effect. We observed(More)
A three-dimensional finite difference computer model has been developed to calculate temperature distributions in vascularised tissues in hyperthermia. Besides offering the possibility of calculating temperature distributions according to the conventional ' bioheat transfer' method, this model allows the introduction of several discrete blood vessels and(More)
Software agents are involved in Internet applications such as E-commerce and may contain identificatory information about their human user such as credit cards and bank accounts. This paper discusses whether human users and software agents are allowed to be anonymous and whether anonymity is technically realisable from the perspective of Artificial(More)
Fifty years ago, Hanbury Brown and Twiss (HBT) discovered photon bunching in light emitted by a chaotic source, highlighting the importance of two-photon correlations and stimulating the development of modern quantum optics. The quantum interpretation of bunching relies on the constructive interference between amplitudes involving two indistinguishable(More)
Software agents extend the current, information-based Internet to include autonomous mobile processing. In most countries such processes, i.e., software agents are, however, without an explicit legal status. Many of the legal implications of their actions (e.g., gathering information, negotiating terms, performing transactions) are not well understood. One(More)
An important characteristic of mobile agents is that they often do not run on their user's platform, but on the platform of someone else. There often is no pre-existing relation between the 'owner' of the running agent's process and the owner of the platform on which the agent process runs. When there are conflicts the position of the owner is not clear: is(More)
Software agents extend the current, information-based Internet to include autonomous mobile processing. In most countries such processes, i.e. software agents are, however, without an explicit legal status. Many of the legal implications of their actions (e.g. gathering information, negotiating terms, performing transactions) are not well understood. One(More)
We study atom scattering from two colliding Bose-Einstein condensates using a position sensitive, time resolved, single atom detector. In analogy to quantum optics, the process can also be thought of as spontaneous, degenerate four-wave mixing of de Broglie waves. We find a clear correlation between atoms with opposite momenta, demonstrating pair production(More)