3,203 research outputs found

    The rise of a tensor instability in Eddington-inspired gravity

    Full text link
    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

    Full text link
    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 qq-Gaussian form, P(x)(1+(q1)[x/β]2)1/(1q)P(x)\propto (1+(q-1)[x/\beta]^2)^{1/(1-q)}, with parameter qq increasing with time before reaching a steady value q3/2q\simeq 3/2. 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

    Get PDF
    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

    Get PDF
    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)

    Get PDF
    https://digitalmaine.com/alien_docs/22161/thumbnail.jp

    Alien Registration- Mackenzie, Celia G. (Portland, Cumberland County)

    Get PDF
    https://digitalmaine.com/alien_docs/22161/thumbnail.jp

    Alien Registration- Mackenzie, Celia G. (Portland, Cumberland County)

    Get PDF
    https://digitalmaine.com/alien_docs/22161/thumbnail.jp

    The psychosocial genomics paradigm of hypnosis and mind–body integrated psychotherapy: experimental evidence

    Get PDF
    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

    Get PDF
    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)
    corecore