Showing papers by "Mobil published in 2012"
TL;DR: Numerical analyses found that, although the images were somewhat blurred, image artifacts could be significantly reduced and accurate images could be reconstructed without the inverse-matrix operation used in conventional image reconstruction methods.
Abstract: Magnetic particle imaging (MPI), in which the nonlinear interaction between internally administered magnetic nanoparticles (MNPs) and electromagnetic waves irradiated from outside of the body is utilized, has attracted attention for its potential to achieve early diagnosis of diseases such as cancer. In MPI, the local magnetic field distribution is scanned, and the magnetization signal from MNPs within a selected region is detected. However, the signal sensitivity and image resolution are degraded by interference from magnetization signals generated by MNPs outside of the selected region, mainly because of imperfections (limited gradients) in the local magnetic field distribution. Here, we propose new methods based on correlation information between the observed signal and the system function—defined as the interaction between the magnetic field distribution and the magnetizing properties of MNPs. We performed numerical analyses and found that, although the images were somewhat blurred, image artifacts could be significantly reduced and accurate images could be reconstructed without the inverse-matrix operation used in conventional image reconstruction methods.
9 citations
3 citations
13 Mar 2012
TL;DR: Novel algorithms are proposed to ensure seamless handover among positioning systems, but also makes context awareness, information gathering and user preferences part of the positioning solution.
Abstract: Mobile users are becoming increasingly dependent on location related information. Delivery of accurate and timely location related information depends on estimation of the mobile user's position. Due to the limitation of coverage associated with common positioning systems for mobiles, integration of different types of positioning systems is necessary. Such an integrated solution can only work if it ensures smooth, unobtrusive handover among the positioning systems involved. In this paper, we propose novel algorithms to realize the goal of smooth handover among positioning systems. Our proposed algorithms not only ensure seamless handover among positioning systems, but also makes context awareness, information gathering and user preferences part of the positioning solution.
2 citations
01 Jan 2012
2 citations
01 Jan 2012
TL;DR: In this paper, the authors presented at the DIME Workshop "The Changing Governance of Network Industries" in Naples, 29-30 April 2010, at the 1st DIME Scientific Conference "Knowledge in space and time: economic and policy implications of the knowledge-based economy" in Strasbourg, 7-9 April 2008 and at the 9th IAEE European Energy Conference "Energy Markets and Sustainability in a Larger Europe" in Florence, 10−13 June 2007.
Abstract: Earlier versions of this paper were presented at the DIME Workshop “The Changing Governance of Network Industries”, Naples, 29–30 April 2010, at the 1st DIME Scientific Conference “Knowledge in space and time: economic and policy implications of the knowledge-based economy” in Strasbourg, 7–9 April 2008 and at the 9th IAEE European Energy Conference “Energy Markets and Sustainability in a Larger Europe” in Florence, 10–13 June 2007.
1 citations