115,698 research outputs found

    The impact of fruit flavonoids on memory and cognition

    Get PDF
    There is intense interest in the studies related to the potential of phytochemical-rich foods to prevent age-related neurodegeneration and cognitive decline. Recent evidence has indicated that a group of plant-derived compounds known as flavonoids may exert particularly powerful actions on mammalian cognition and may reverse age-related declines in memory and learning. In particular, evidence suggests that foods rich in three specific flavonoid sub-groups, the flavanols, anthocyanins and/or flavanones, possess the greatest potential to act on the cognitive processes. This review will highlight the evidence for the actions of such flavonoids, found most commonly in fruits, such as apples, berries and citrus, on cognitive behaviour and the underlying cellular architecture. Although the precise mechanisms by which these flavonoids act within the brain remain unresolved, the present review focuses on their ability to protect vulnerable neurons and enhance the function of existing neuronal structures, two processes known to be influenced by flavonoids and also known to underpin neuro-cognitive function. Most notably, we discuss their selective interactions with protein kinase and lipid kinase signalling cascades (i.e. phosphoinositide-3 kinase/Akt and mitogen-activated protein kinase pathways), which regulate transcription factors and gene expression involved in both synaptic plasticity and cerebrovascular blood flow. Overall, the review attempts to provide an initial insight into the potential impact of regular flavonoid-rich fruit consumption on normal or abnormal deteriorations in cognitive performance

    'Variation' : 32 short performances

    Full text link
    'Variation' consists of 32 short performances varying in length from 35 seconds to 6 minutes and 4 seconds. The performances occured at 1.30pm on 32 consecutive weekdays in the foyer space at Back Hill, London

    From Homework to Home Learning

    Full text link
    Stop assigning homework, and watch the learning grow


    Get PDF
    Prose by Spencer Lough

    Measuring Strain in Trusses

    Get PDF
    Strain is an important quantity in engineering and materials science that relates the deformation of a material to its original length as a percent. Different materials exhibit particular qualities under loading, for example the amount of strain due to a certain magnitude of force, or the amount of strain that can be borne before failure. This experiment aims to compare the relative strengths of three common truss configurations by measuring the strain in their members under loading

    “A Cloud of Constitutional Illegitimacy”: Prospectivity and the De Facto Doctrine in the Gerrymandering Context

    Get PDF
    Courts have traditionally shielded the acts of malapportioned or otherwise illegally constituted legislatures from dissolution by employing the “de facto doctrine,” an ancient common law policy tool with medieval roots. In its most basic form, the de facto doctrine seeks to safeguard the acts of unlawful but well-intentioned public officials from collateral attack out of concern for third-party reliance and a bald recognition of necessity. However, the doctrine as traditionally articulated only serves to validate past official acts; once the official in question has lost the “color of authority,” the doctrine no longer affords his actions de facto validity. Although this has not prevented courts from extending the doctrine, or something like it, to cover prospective acts in certain scenarios, courts have generally avoided “taking a look under the hood” and wrestling with the policy concerns underlying the doctrine to see if they still apply prospectively. This Note examines the potential use of the de facto doctrine in the gerrymandering context. Both racial and partisan gerrymandering present distinct challenges for courts seeking to prospectively apply the de facto doctrine to acts of a state legislature: generally, gerrymanders are created intentionally, making it harder to apply any “good faith” exception; illegal gerrymandering by its nature trespasses on important constitutional guarantees; and the traditional motivations for the de facto doctrine—necessity and reliance—arguably do not apply to legislation crafted by an unconstitutional government body seeking to preserve its power. By examining the historical roots of the doctrine, tracing its modern development, and considering its underlying policy rationales, this Note seeks to answer two questions: (1) how have courts expanded the de facto doctrine and its animating principles prospectively?; and (2) how do those expansions shape the prospective application of the doctrine in the gerrymandering context