Results are based on the analysis of journal articles indexed in the PubMed database. PubMed is a service of the National Library of Medicine and includes over 15 million citations for biomedical articles dating back to the 1950's [2]. A non-author-specific search was executed to obtain the set of all papers related to magnetic resonance imaging. The PubMed query was: “magnetic resonance imaging”[MeSH Terms]

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A simple, fast, and approximate voxel-based approach to 6-DOF haptic rendering is presented. It can reliably sustain a 1000 Hz haptic refresh rate without resorting to asynchronous physics and haptic rendering loops. It enables the manipulation of a modestly complex rigid object within an arbitrarily complex environment of static rigid objects. It renders a short-range force field surrounding the static objects, which repels the manipulated object and strives to maintain a voxel-scale minimum separation distance that is known to preclude exact surface interpenetration. Force discontinuities arising from the use of a simple penalty force model are mitigated by a dynamic simulation based on virtual coupling. A generalization of octree improves voxel memory efficiency. In a preliminary implementation, a commercially available 6-DOF haptic prototype device is driven at a constant 1000 Hz haptic refresh rate from one dedicated haptic processor, with a separate processor for graphics. This system yields stable and convincing force feedback for a wide range of user controlled motion inside a large, complex virtual environment, with very few surface interpenetration events. This level of performance appears suited to applications such as certain maintenance and assembly task simulations that can tolerate voxel-scale minimum separation distances.

Abstract — Six Degrees of Kevin Bacon refers to a game where you try to link any actor to Kevin Bacon by the fewest movies. Every actor has a Bacon number. If an actor appears in the same movie as Kevin Bacon his Bacon number is 1. This paper creates a new movie with a cast that lowers the weighted

-called six degrees of separation phenomenon; (2) In sync with Lotka’s law on the frequency of publications, the db community also shows that a few number of scholars publish a large number of papers, while the majority of authors publish a small number of papers (i.e., following the power-law with exponent

Abstract While the phrase “six degrees of separa-tion ” is widely used to characterize a variety of human-derived networks, in this study we show that in patent citation network, related patents are connected with an average distance of 6, whereas an average distance for a random pair of nodes

Abstract — Six degrees of separation is a well-known idea that any two people on this planet can be connected via an average number of six steps. Having succeeded in the real world, the theory even directly or indirectly motivated the invention of online societies. However, no much effort has been

is trilaterable by relying only on its topology. Based on this fact, we here enumerate all trilaterable serial and in-parallel robots with six degrees of freedom. The relevance of the obtained family of manipulators is established when it is shown to contain the best-known commercial serial robots. As a result

translational and three rotational degrees of freedom, find a continuous, collision-free path taking P from some initial configuration to a desired goal configuration. This paper describes an implementation of a complete algorithm (at a given resolution)for the full six degree of freedom Movers' problem

by constructing the corresponding networks based on the number of grants collaborated. We further analyze the directorates to identify the differences in collaboration trends between disciplines. Keywords-Complex networks; Complex network analysis; Research funding networks; Six degrees of separation; NSF. I.