3,203 research outputs found
The rise of a tensor instability in Eddington-inspired gravity
In this work an extension to Eddington's gravitational action is analyzed. We
consider the tensor perturbations of a FLRW space-time in the Eddington regime
in where the tensor mode is linearly unstable deep and the resulting
modifications to Einstein regime are quite strong.Comment: 2 pages, to appear in the Proceedings of the 13th Marcel Grossman
Meeting (Stockholm, Sweden, July 1-7 2012), invited talk at the Parallel
Session AT4 "Modify Gravity
On the diffusive anomalies in a long-range Hamiltonian system
We scrutinize the anomalies in diffusion observed in an extended long-range
system of classical rotors, the HMF model. Under suitable preparation, the
system falls into long-lived quasi-stationary states presenting super-diffusion
of rotor phases. We investigate the diffusive motion of phases by monitoring
the evolution of their probability density function for large system sizes.
These densities are shown to be of the -Gaussian form, , with parameter increasing with time before
reaching a steady value . From this perspective, we also discuss
the relaxation to equilibrium and show that diffusive motion in
quasi-stationary trajectories strongly depends on system size.Comment: 5 pages, 5 figures. References added and correcte
National security council: why it would be unwise for Johnson to reduce its role
Celia G. Parker writes that albeit not being perfect, the National Security Council provides the best system the UK has had for the discussion and implementation of national security strategy. Failing to employ it as it was designed may result in a less effective, less transparent, and less accountable national security decision-making system
Long-Term Outcomes of Chronic, Recreational Marijuana Use
As numerous variations of cannabis become increasingly legalized in the United States, a growing body of research is emerging that reveals the adverse effects of chronic, recreational, and long-term marijuana use on human mental, emotional, and social development, general cognition, and academic and career performance. Marijuana is the most commonly used illicit drug in the nation and its potency continues to rise (Atkinson, 2016; Beaver, 2010; Gilman, 2015). Addiction scientists have found an association between chronic cannabis use and slowed neurocognitive function and information processing, measurable deficits in memory, learning, motivation, attention, persistent irritability, paranoia, insomnia, anxiety disorders, depression, general malaise, adverse social outcomes, and negative effects on educational and occupational outcomes (Ames, 2018; Ansell, 2015; Aria, 2015; Ashenhurst, 2017; Atkinson, 2016; Brook, 2011a; Brook, 2011b; Brook, 2008; Brook, 1999; Buckner, 2009; Cobb-Clarke, 2015; Derrick, 2018; Doherty, 2017; French, 2014; Gilman, 2015; Homel, 2016; Lac, 2018; Meier, 2018). It is likely that as the legalization of cannabis expands, the social and human cost of this epidemic will rapidly accumulate, calling for prompt public health, clinical, and legislative efforts to manage the consequences
Alien Registration- Mackenzie, Celia G. (Portland, Cumberland County)
https://digitalmaine.com/alien_docs/22161/thumbnail.jp
Alien Registration- Mackenzie, Celia G. (Portland, Cumberland County)
https://digitalmaine.com/alien_docs/22161/thumbnail.jp
Alien Registration- Mackenzie, Celia G. (Portland, Cumberland County)
https://digitalmaine.com/alien_docs/22161/thumbnail.jp
The psychosocial genomics paradigm of hypnosis and mind–body integrated psychotherapy: experimental evidence
The psychosocial genomics paradigm first proposed by Ernest Rossi
established an epistemological shift in our application of hypnosis. We
present original experimental research conducted within this paradigm
that highlights the mind–gene relationship and, in particular,
the positive health effects associated with hypnosis and mind–body
integrated psychotherapy. We document that these approaches can
stimulate epigenetic modifications and the expression of genes
related to anti-inflammatory processes. These strategies strengthen
the immune system and reduce oxidative stress both in normal and
in oncological participants
Restructuring the Philippine Statistical System in Response to New Challenges
For a national statistical system to continue to be useful and relevant to its clients and the general public, it has to occasionally undergo an exhaustive evaluation of its performance according to certain parameters. The Philippine statistical system had recently gone through such process. This Policy Notes provides a summary of the findings and recommendations of the evaluation.statistical system, Philippine Statistical System (PSS)
- …