Sphere fitting is a common problem in almost all science and engineering disciplines. Most of methods available are iterative in behavior. This involves fitting of the parameters in a least square sense or in a geometric sense. Here we extend the methods of Thomas Chan and Landau who fitted the 2D data using circle. This work closely resemble their work in redefining the error estimate and solv...

We show how the velocity half-sphere model S. Menon, Q. Su, and R. Grobe, Phys. Rev. E 72, 04191

This study examines how journalists and technologists are re-imagining the construction of networked, dynamic spaces for online news discussion through a qualitative study of 126 idea submissions to a popular news innovation contest. We consider these submissions in the light of the concept of the public sphere, with a specific focus on how these submissions might address shortcomings identifie...

For iterative detection in systems employing multiple antennas with an outer code we need a MIMO detector delivering a-posteriori probabilities (APP) about the coded bits. Full-APP detection would lead to prohibitive complexity, therefore we extend for high-level signals the concept of the sphere decoder using an approach from sequential decoding instead of geometrical considerations. We show h...

We study the topological properties on fuzzy sphere. We show that the topological charge is only defined modulo N + 1, that is finite integer quotient ZN+1, where N is a cut-off spin of fuzzy sphere. This periodic structure on topological charges is shown based on the boson realizations of SU(2) algebra, Schwinger vs. Holstein-Primakoff. We argue that this result can have a natural K-theory int...

A major trend in information society is the integration of personal information from different sources. Digital data about persons, their behavior, their content and their social structure is merged into the personal information sphere; a multi-dimensional space containing information related to a person. In the research project di.me 1 , funded by the EC, a so called userware is developed to s...

An icosahedral-hexagonal grid on the two-sphere is created by dividing the faces of an icosahedron and projecting the vertices onto the sphere. This grid and its Voronoi tessellation have several desirable features for numerical simulations of physical processes on the sphere. While several methods to construct the icosahedral grid mesh have been proposed over the past decades, and empirical da...