The Causal Interpretation of Dust and Radiation Fluids Non-Singular Quantum Cosmologies

We apply the causal interpretation of quantum mechanics to homogeneous and isotropic quantum cosmology where the sources of the gravitational field are either dust or radiation perfect fluids. We find non-singular quantum trajectories which tends to the classical one when the scale factor becomes much larger then the Planck length. In this situation, the quantum potential becomes negligible. There are no horizons. As radiation is a good approximation for the matter content of the early universe, this result suggests that the universe can be eternal due to quantum effects.Comment: 10 pages, LaTeX, 5 figures in postscript, requires eps

Resource design in constrained networks for network lifetime increase

As constrained "things" become increasingly integrated with the Internet and accessible for interactive communication, energy efficient ways to collect, aggregate, and share data over such constrained networks are needed. In this paper, we propose the use of constrained RESTful environments interfaces to build resource collections having a network lifetime increase in mind. More specifically, based on existing atomic resources, collections are created/designed to become available as new resources, which can be observed. Such resource design should not only match client's interests, but also increase network lifetime as much as possible. For this to happen, energy consumption should be balanced/fair among nodes so that node depletion is delayed. When compared with previous approaches, results show that energy efficiency and network lifetime can be increased while reducing control/registration messages, which are used to set up or change observations

Motion of Primordial Black Holes in the Early Universe and Their Likely Distribution Today

We look in detail at those effects which slow down black holes of mass sim1015 g and affect their spatial distribution today. In particular we treat effects caused by the charge fluctuations of the hole which result from quantum-mechanical processes. The dominant energyloss mechanism for the holes is the expansion of the universe, which leaves them virtually at rest at the time of galaxy formation. The resultant violent relaxation should concentrate roughly half of them in present-day galaxies and their halos