Bodies of friends pulled from Essequibo River

first_imgThe bodies of the two friends who went missing on Tuesday last following a mishap in the Essequibo River were recovered on Friday morning. Dead are 50-year-old Ravie Chutie of Hog Island and 56-year-old Ozard Russell of Aliki, Essequibo River. Their bodies, according to information received, are badly damaged.It was reported that the two now dead men along with Janet Robinson, the reputed wife of Chutie, were travelling along the Essequibo River in a wooden boat powered by a 15-horsepower engine when they encountered rough waters.The pounding waves caused Chutie to lose balance and fall overboard and in a bid to save his friend’s life, Russell went after him, but neither of them resurfaced.The boat drifted to the Hog Island foreshore where Robinson alerted persons. A group of men went in search of the two men but came up empty-handed.The police were contacted and based on reports received, the woman said that the two men were intoxicated since they drank a bottle of alcohol before they departed from the Hubu Koker, Parika, East Bank Essequibo (EBE).A post mortem examination is expected to be conducted shortlylast_img read more

Physicists propose identification of a gravitational arrow of time

first_img © 2014 Phys.org Citation: Physicists propose identification of a gravitational arrow of time (2014, November 3) retrieved 18 August 2019 from https://phys.org/news/2014-11-physicists-identification-gravitational-arrow.html Configuration of masses evolving under Newtonian gravity. Barbour et al. show that nearly all such systems have a moment of “lowest complexity,” which they identify as a unique “past” from which two “futures” emerge. Journal information: Physical Review Letters Data from ‘old’ experiment appears to constrain the idea of dark photons as part of dark matter theory More information: Identification of a Gravitational Arrow of Time, Phys. Rev. Lett. 113, 181101 – Published 29 October 2014 http://dx.doi.org/10.1103/PhysRevLett.113.181101 (free PDF)ABSTRACTIt is widely believed that special initial conditions must be imposed on any time-symmetric law if its solutions are to exhibit behavior of any kind that defines an “arrow of time.” We show that this is not so. The simplest nontrivial time-symmetric law that can be used to model a dynamically closed universe is the Newtonian N-body problem with vanishing total energy and angular momentum. Because of special properties of this system (likely to be shared by any law of the Universe), its typical solutions all divide at a uniquely defined point into two halves. In each, a well-defined measure of shape complexity fluctuates but grows irreversibly between rising bounds from that point. Structures that store dynamical information are created as the complexity grows and act as “records.” Each solution can be viewed as having a single past and two distinct futures emerging from it. Any internal observer must be in one half of the solution and will only be aware of the records of one branch and deduce a unique past and future direction from inspection of the available records.center_img For all the advances made in understanding the world around us, there are still two very basic fundamental concepts that have defied explanation: time and gravity. Though we have progressed greatly in measuring both and using both to understand other concepts, we still today are no closer to understanding either than we were when we first conceptualized them. Such an acknowledgment suggests that we likely have a major flaw in our understanding of the universe. In considering such a possibility, the three physicists with this new effort suggest we might look at time in a completely new way—by dividing a dynamically closed universe (ala the Newtonian N-body problem) into two halves with shape complexity growing from a single point—each solution to the problem can then be considered as having one past but two distinctly futures. In such a scenario, an observer would of necessity have to exist on one side or the other, and thus would only ever have that perspective. Critical to this idea is that the all of the energy and angular momentum in such a system would have to be zero.In essence, the team has removed time from mathematical functions that describe the energy of the universe—that’s what allows for splitting the equations that have been created to describe the evolution of the universe into two parts, with both having initial low complexity moving to higher complexity (similar in some respects to theories of time based on entropy). The proposal by the trio though phrased in a way as to suggest it’s a solution to the arrow of time problem, is not likely to be addressed as such by the physics community—it’s more likely to be considered as yet another theory that works mathematically, yet still can’t answer the basic question of what is time. Explore further This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. (Phys.org) —A trio of physicists is proposing a new direction for understanding the concept of time. In their paper published in the journal Physical Review Letters, Julian Barbour, of College Farm in the U.K., Tim Koslowski of the University of New Brunswick in Canada and Flavio Mercati of the Perimeter Institute for Theoretical Physics also in Canada, describe their new ideas beginning with the suggestion that initial conditions don’t necessarily need to be imposed on time-symmetric law when attempting to describe solutions to behaviors that define an “arrow of time.”last_img read more