ECCD-induced sawtooth crashes at W7-X

The optimised superconducting stellarator W7-X generates its rotational transform by means of external coils, therefore no toroidal current is necessary for plasma confinement. Electron cyclotron current drive experiments were conducted for strikeline control and safe divertor operation. During current drive experiments periodic and repetitive crashes of the central electron temperature, similar to sawtooth crashes in tokamaks, were detected. Measurements from soft x-ray tomography and electron cyclotron emission show that the crashes are preceded by weak oscillating precursors and a displacement of the plasma core, consistent with a (m, n)=(1, 1) mode. The displacement occurs within 100μs, followed by expulsion and redistribution of the core into the external part of the plasma. Two types of crashes, with different frequencies and amplitudes are detected in the experimental program. For these non-stationary parameters a strong dependence on the toroidal current is found. A 1-D heuristic model for current diffusion is proposed as a first step to explain the characteristic crash time. Initial results show that the modelled current diffusion timescale is consistent with the initial crash frequency and that the toroidal current rise shifts the position where the instability is triggered, resulting in larger crash amplitudes

Guidance on tiered risk assessment for plant protection products for aquatic organisms in edge-of-field surface waters

EFSA’s Panel on Plant Protection Products and their Residues (PPR) was tasked to revise the Guidance Document (GD) on Aquatic Ecotoxicology under Council Directive 91/414/EEC (SANCO/3268/2001 rev.4 (final), 17 October 2002). This Guidance of the PPR Panel is the first of three requested deliverables within this mandate. It has its focus on tiered acute and chronic effect assessment schemes with detailed guidance on tier 1 and higher tier effect assessments for aquatic organisms in edge-of-field surface waters and on proposals regarding how to link effects to exposure estimates. The exposure assessment methodology was not reviewed and it is assumed that the current FOCUS surface water exposure assessment methodology will continue to be used for exposure assessment at EU level. The current GD is intended to be used for authorisation of active substances at EU level as well as for plant protection products at Member State level. The effect assessment schemes in this GD allow for the derivation of regulatory acceptable concentrations (RACs) on the basis of two options: (1) the ecological threshold option (ETO), accepting negligible population effects only, and (2) the ecological recovery option (ERO), accepting some population-level effects if ecological recovery takes place within an acceptable time period. In the tiered effect assessment schemes, in principle, all tiers (1, 2 and 3) are able to address the ETO, while the model ecosystem approach (tier 3), under certain conditions, is able to also address the ERO. The GD provides the scientific background for the risk assessment to aquatic organisms in edge-of-field surface waters and is structured to give detailed guidance on all assessment steps. An executive summary joining all parts of the guidance and decision schemes in a concise way is provided and is intended to help applicants and regulatory authorities in day-to-day use

Mother, Monster, Mrs, I:A critical evaluation of gendered naming strategies in English sentencing remarks of women who kill

In this article, we take a novel approach to analysing English sentencing remarks in cases of women who kill. We apply computational, quantitative, and qualitative methods from corpus linguistics to analyse recurrent patterns in a collection of English Crown Court sentencing remarks from 2012 to 2015, where a female defendant was convicted of a homicide offence. We detail the ways in which women who kill are referred to by judges in the sentencing remarks, providing frequency information on pronominal, nominative, and categorising naming strategies. In discussion of the various patterns of preference both across and within these categories (e.g. pronoun vs. nomination, title + surname vs. forename + surname), we remark upon the identities constructed through the references provided. In so doing, we: (1) quantify the extent to which members of the judiciary invoke patriarchal values and gender stereotypes within their sentencing remarks to construct female defendants, and (2) identify particular identities and narratives that emerge within sentencing remarks for women who kill. We find that judges refer to women who kill in a number of ways that systematically create dichotomous narratives of degraded victims or dehumanised monsters. We also identify marked absences in naming strategies, notably: physical identification normally associated with narrativization of women’s experiences; and the first person pronoun, reflecting omissions of women’s own voices and narratives of their lived experiences in the courtroom

Long-Term Health Correlates of Timing of Sexual Debut: Results From a National US Study

Objectives. We explored long-term health consequences of age at sexual initiation and of abstinence until marriage to evaluate empirical support for the claim that postponing sexual initiation has beneficial health effects