Gravitational Coupling and Dynamical Reduction of The Cosmological Constant

We introduce a dynamical model to reduce a large cosmological constant to a sufficiently small value. The basic ingredient in this model is a distinction which has been made between the two unit systems used in cosmology and particle physics. We have used a conformal invariant gravitational model to define a particular conformal frame in terms of large scale properties of the universe. It is then argued that the contributions of mass scales in particle physics to the vacuum energy density should be considered in a different conformal frame. In this manner, a decaying mechanism is presented in which the conformal factor appears as a dynamical field and plays a key role to relax a large effective cosmological constant. Moreover, we argue that this model also provides a possible explanation for the coincidence problem.Comment: To appear in GR

Method of transferring data packets in a communications network

In a method of communication, a first type of data packet is received. The first type of data packet is at least a portion of a second type of data packet. Based on the received first type of data packet, a determination is made as to whether to expect receipt of a subsequent first type of data packet in a given time interval. A status signal is sent if the subsequent first type of data packet is not received in the given time interval as determined in the determining step. In another method of communication, a data packet is received at a physical layer over a circuit switched physical channel. A status of the data packet is determined at the physical layer. A status report is sent to a higher protocol layer based on the determination

Integrated base stations and a method of transmitting data units in a communications system for mobile devices

Integrated base stations and a method of transmitting data units in a communications system for mobile devices. In one embodiment, an integrated base station includes a communications processor having a protocol stack configured with a media access control layer and a physical layer

Evaluation of OpenMP task scheduling strategies

OpenMP is in the process of adding a tasking model that allows the programmer to specify independent units of work, called tasks, but does not specify how the scheduling of these tasks should be done (although it imposes some restrictions). We have evaluated different scheduling strategies (schedulers and cut-offs) with several applications and we found that work-first schedules seem to have the best performance but because of the restrictions that OpenMP imposes a breadth-first scheduler is a better choice to have as a default for an OpenMP runtime.Peer Reviewe