RLCYC 75: A 2 kW electrically calibrated laser calorimeter designed for Laser MegaJoule diagnostics calibration

RLCYC 75 is a new electrically calibrated laser calorimeter specially manufactured by Laser Metrology to calibrate energy diagnostics within the Laser MegaJoule (LMJ) facility. It consists of an optical cavity cooled by a hydraulic system. The system is designed to provide 1 m wavelength power laser measurements with uncertainty less than 1% at 2 kW and traceability to the International System of Units (SI). In this paper, the accuracy of RLCYC 75 measurements is studied. More precisely, three points are detailed: instrumentation uncertainty estimation, equivalence between optical and electrical supply and light absorption. To this end, electrical calibration campaigns and power laser measurement campaigns are conducted. Moreover, thermal and optical models are developed. Results show that RLCYC 75 design and instrumentation are efficient enough to reach the goal of relative uncertainty of about 1% at 2 kW. RLCYC 75 will become the 2 kW laser power primary standard for LMJ applications

Social movements, the European crisis, and EU political opportunities

Social movements in the wake of the financial crisis have shifted from the counter-summits and world social forums of the global justice movement to the camps of the anti-austerity mobilizations, and from a clear focus on building ‘another Europe’ to more domestically embedded issues. Among other reasons, this turn away from the EU can be linked to contracting political opportunities for social justice movements at the European level. This article addresses the closure of opportunities at the EU level for the work of social movement groups campaigning on specific EU policies. We reflect on the complexity of the EU’s political opportunity structure prior to the financial crisis, before examining changes to the EU’s architecture effected through responses to the crises and outlining arguments on how EU level opportunities around socio-economic issues in particular have shrunk as a result. We then show how the perception of other political opportunities at the EU level is affected by the austerity response by drawing on campaigns that sought to exploit new opportunities included in the Lisbon Treaty and designed to increase citizens’ input. Opportunities introduced by changes made in the Lisbon Treaty are perceived through the prism of contracted opportunities flowing from power shifts caused by the response to the financial crisis

Researching COVID-19: A Research Agenda for Public Policy and Administration Scholars

Coronavirus (COVID-19) is one of the defining policy challenges of an era. In this article we sketch some possible ways in which the public policy and administration (PPA) scholarly community can make an enduring contribution about how to cope with this terrible crisis. We do so by offering some elements that to delineate a tentative research agenda for PPA scholars, to be pursued with epistemic humility. We outline the contours of seven analytical themes that are central to the challenges presented by COVID-19: policy design and instruments; policy learning; public service and its publics; organisational capacity; public governance; administrative traditions; and public sector reforms in multi-level governance (MLG). The list is neither exhaustive nor exclusive to COVID-19 only. The knowledge the PPA scholarly community can generate must speak not only to the daunting challenge of COVID-19 itself but also to policymakers, and indeed humankind, trying to cope with future unexpected but high impact threats (‘black swans’), by leveraging better public policies and building administrative capacities to enable more resilient, equitable and effective public services

In the name of "the people"? Popular Sovereignty and the 2015 Greek referendum

This article explores the rise of new conflicts of sovereignty especiallywith regard to popular sovereignty in the EU polity. It askswhether referenda in the national realm are effective tools toenhance popular sovereignty at supranational level. To elucidatethis question, we distinguish between embedded and unilateralreferenda. Empirically, the paper focuses on the referendum calledby the Greek government on the proposed Memorandum ofUnderstanding in 2015. While ambiguous from the outset, thereferendum turned out to be of an embedded nature and failedto enhance popular sovereignty. Based on elite interviews andanalysis of the discussion in the media, our analysis shows thatthe referendum was envisaged by the Greek government instrumentallyto put pressure on the other negotiating parties andtackle internal party disagreements. This turned out to be a selfdefeatingstrategy ignoring the popular mandate and failing toimprove the conditions for financial assistance.info:eu-repo/semantics/publishe

Interest representation in the EU: an open and structured dialogue?

Since 1992, the European Commission has sought to build ‘An Open and Structured Dialogue’ with interest groups, and since 2001 a broader ‘Dialogue with Civil Society’. A core feature of this dialogue involves instruments of transparency, and pluralism, with funding to ensure the presence of a wide range of voices. Consultation procedures provide for a ‘marketplace of ideas’ which simulate political competition and contestation, with a ‘voice but not a vote’, and which are supposed to provide for answerability by the European Commission for its policy choices. The European Commission also selects its allies to support its regulatory proposals, with NGOs frequent allies as well as firms and business sectors supporting higher standards. The EU’s fragmented decision-making system helps to provide a naturally pluralist environment, although some recent research suggests that NGOs are more likely to be successful in securing their policy goals than business organizations. NGOs work mostly in coalitions, with the size of coalition a factor in lobbying success. The saliency of issues is another substantial feature of variation in lobbying success and where NGOs can raise the contention of issues they can bring wider participation in EU issues

Treatment with green tea extract attenuates secondary inflammatory response in an experimental model of spinal cord trauma

In this study, we evaluated the effect of green tea extract (that was administered 25 mg/kg intraperitoneal at 1 and 6 h after injury) in experimental animal model of spinal cord injury. The spinal cord trauma was induced by the application of vascular clips to the dura via a four-level T5–T8 laminectomy. Spinal cord injury in mice resulted in severe trauma characterised by oedema, neutrophilic infiltration and apoptosis. Also, immunohistochemical examination demonstrated a marked increase in immune reactivity for nitrotyrosine. All parameters of inflammation were attenuated by green tea extract. The degree of spinal cord inflammation, nitrotyrosine, poli (ADP-ribosio) synthetase (PARS) and neutrophilic infiltration was markedly reduced. Green tea extract significantly ameliorated the recovery of limb function. Values shown are mean ± SE mean of ten mice for each group. *p < 0.01 versus sham, °p < 0.01 versus spinal cord injury. Taken together, our results clearly demonstrate that green tea extract treatment ameliorates spinal cord injury oxidative stress

Apple phytochemicals and their health benefits

Evidence suggests that a diet high in fruits and vegetables may decrease the risk of chronic diseases, such as cardiovascular disease and cancer, and phytochemicals including phenolics, flavonoids and carotenoids from fruits and vegetables may play a key role in reducing chronic disease risk. Apples are a widely consumed, rich source of phytochemicals, and epidemiological studies have linked the consumption of apples with reduced risk of some cancers, cardiovascular disease, asthma, and diabetes. In the laboratory, apples have been found to have very strong antioxidant activity, inhibit cancer cell proliferation, decrease lipid oxidation, and lower cholesterol. Apples contain a variety of phytochemicals, including quercetin, catechin, phloridzin and chlorogenic acid, all of which are strong antioxidants. The phytochemical composition of apples varies greatly between different varieties of apples, and there are also small changes in phytochemicals during the maturation and ripening of the fruit. Storage has little to no effect on apple phytochemicals, but processing can greatly affect apple phytochemicals. While extensive research exists, a literature review of the health benefits of apples and their phytochemicals has not been compiled to summarize this work. The purpose of this paper is to review the most recent literature regarding the health benefits of apples and their phytochemicals, phytochemical bioavailability and antioxidant behavior, and the effects of variety, ripening, storage and processing on apple phytochemicals

Generation of Large-Scale Vorticity in a Homogeneous Turbulence with a Mean Velocity Shear

An effect of a mean velocity shear on a turbulence and on the effective force which is determined by the gradient of Reynolds stresses is studied. Generation of a mean vorticity in a homogeneous incompressible turbulent flow with an imposed mean velocity shear due to an excitation of a large-scale instability is found. The instability is caused by a combined effect of the large-scale shear motions (''skew-induced" deflection of equilibrium mean vorticity) and ''Reynolds stress-induced" generation of perturbations of mean vorticity. Spatial characteristics, such as the minimum size of the growing perturbations and the size of perturbations with the maximum growth rate, are determined. This instability and the dynamics of the mean vorticity are associated with the Prandtl's turbulent secondary flows. This instability is similar to the mean-field magnetic dynamo instability. Astrophysical applications of the obtained results are discussed.Comment: 8 pages, 3 figures, REVTEX4, submitted to Phys. Rev.