Shot Noise in Gravitational-Wave Detectors with Fabry-Perot Arms

Shot-noise-limited sensitivity is calculated for gravitational-wave interferometers with Fabry–Perot arms, similar to those being installed at the Laser Interferometer Gravitational-Wave Observatory (LIGO) and the Italian–French Laser Interferometer Collaboration (VIRGO) facility. This calculation includes the effect of nonstationary shot noise that is due to phase modulation of the light. The resulting formula is experimentally verified by a test interferometer with suspended mirrors in the 40-m arms

Recognizing and addressing how gender shapes young people's experiences of image-based sexual harassment and abuse in educational settings

This paper explores findings from a study with 150 young people (aged 12-21) across England, which employed qualitative focus groups and arts-based methods to investigate young people's experiences of digital image-sharing practices. In this paper, we explore how gendered pressures to send nudes experienced by girls is a form of Image-Based Sexual Harassment (IBSH) and how pressures upon boys to secure nudes and prove they have them by sharing them non-consensually is Image-Based Sexual Abuse (IBSA). In addition, we argue boys’ sending nudes (dick pics) non-consensually is a form of image based sexual harassment, which can be compounded by harassment of girls to send nudes back. We look at the gendered nature of combined practices of Image-Based Sexual Harassment and Abuse (IBSHA) and how sexual double standards create sexual shaming and victim blaming for girls who experience IBSHA. We also explore young people's perspectives on their digital sex and relationship education and their suggestions for improvement. We conclude by arguing that schooling policies and practices would benefit from adopting the conceptual framework of IBSHA. We suggest this would be a good first step in better supporting young people in managing and negotiating digital gendered and sexualized consent, harms, and risks

Understanding and Combatting Youth Experiences of Image-Based Sexual Harassment and Abuse

This report presents findings from qualitative and quantitative research on digital image-sharing practices with 480 young people aged 12 to 18 years (336 in the survey and 144 in focus groups) from across the UK. Although our study examined a wide range of digital sexual behaviours, we found that non-consensual image-sharing practices were particularly pervasive, and consequently normalised and accepted among youth. Through our discussion of young people’s everyday experiences we demonstrate how nonconsensual image-sharing practices constitute forms of image based sexual harassment and abuse. We introduce the term image-based sexual harassment (IBSH) to describe unwanted sexual images (e.g. cyberflashing or unsolicited dick pics) and unwanted solicitation for sexual images (e.g. pressured sexting), and image-based sexual abuse (IBSA) to describe the non-consensual recording, distribution, and/or threat of distribution of sexual images (e.g. revenge porn). Our central aim is to improve the support available for young people by helping parents, teachers, and policymakers to identify and respond to diverse young people’s experiences with image-based sexual harassment and abuse

'Wanna trade?': Cisheteronormative homosocial masculinity and the normalization of abuse in youth digital sexual image exchange

This paper draws upon a qualitative study with 144 young people in seven different research schools in England, exploring how cis-heteronormative homosocial masculinity practices shape digital sexual image exchange. We examine three types of practices: 1) boys asking girls for nudes (pressurized sexting, which we position as online sexual harassment); 2) transactional nude solicitation (boys sending dick pics and asking girls for nudes, which we position as image based sexual harassment and cyberflashing); 3) non-consensual sharing of girls and boys nude images (which we position as image based sexual abuse, showing the differential impacts with lasting sexual stigma worse for girls). Our findings confirm earlier research that demonstrated homosocial masculinity currency is gained via the non-consensual sharing of images of girls’ bodies. We also investigate the more recent rise of male nudes (dick pics) and how a homosocial culture of humour and lad banter tends to lessen the sexual stigmatization of leaked dick pics. We argue providing boys with time and space to reflect on homosocial masculinity performances is crucial for disrupting these practices and our conclusions outline new UK school guidance for tackling online sexual harassment, cyberflashing and image-based sexual abuse

Teen Girls' Experiences Negotiating the Ubiquitous Dick Pic: Sexual Double Standards and the Normalization of Image Based Sexual Harassment

A range of important studies have recently explored adult women’s experiences of receiving unwanted dick pics (Amundsen, 2020). However, to date there has been limited research that has explored teen girls’ experiences of receiving unwanted penis images in depth. To address this gap we draw upon our findings from a qualitative study using focus group interviews and arts based drawing methods to explore social media image sharing practices with 144 young people aged 11–18 in seven secondary schools in England. We argue that being bombarded with unwanted dick pics on social media platforms like Snapchat normalises harassing practices as signs of desirability and popularity for girls, but suggest that being sent unsolicited dick pics from boys at school is more difficult for girls to manage or report than ignoring or blocking random older senders. We also found that due to sexual double standards girls were not able to leverage dick pics for status in the same way boys can use girls’ nudes as social currency, since girls faced the possibility of being shamed for being known recipients of dick pics. Finally we explore how some girls challenge abusive elements of toxic masculinity in the drawing sessions and our conclusion argues that unwanted dick pics should always be understood as forms of image based sexual harassment

Dynamics of Fast and Slow Inhibition from Cerebellar Golgi Cells Allow Flexible Control of Synaptic Integration

SummaryThroughout the brain, multiple interneuron types influence distinct aspects of synaptic processing. Interneuron diversity can thereby promote differential firing from neurons receiving common excitation. In contrast, Golgi cells are the sole interneurons regulating granule cell spiking evoked by mossy fibers, thereby gating inputs to the cerebellar cortex. Here, we examine how this single interneuron class modifies activity in its targets. We find that GABAA-mediated transmission at unitary Golgi cell → granule cell synapses consists of varying contributions of fast synaptic currents and sustained inhibition. Fast IPSCs depress and slow IPSCs gradually build during high-frequency Golgi cell activity. Consequently, fast and slow inhibition differentially influence granule cell spike timing during persistent mossy fiber input. Furthermore, slow inhibition reduces the gain of the mossy fiber → granule cell input-output curve, while fast inhibition increases the threshold. Thus, a lack of interneuron diversity need not prevent flexible inhibitory control of synaptic processing

Young people's experiences of image-based sexual harassment and abuse in England and Canada: Toward a feminist framing of technologically facilitated sexual violence

This article reports on a qualitative research study Sharing Networked Image Practices (SNIP) among young people. We explore our findings from 37 focus groups with 206 young people aged (11–19) in London and South East England and Toronto, Canada conducted in 2019 and 2020. Drawing on feminist legal and criminological scholarship (Powell & Henry, 2017; McGlynn et al., 2017; McGlynn and Johnson, 2020) we develop a framework to clearly identify how and when image sharing should be constituted as forms of: (1) Image-Based Sexual Harassment (IBSH) (i.e. unsolicited penis images (‘dick pics’) and unwanted solicitation for nudes), and (2) Image-Based Sexual Abuse (IBSA) (i.e. non-consensual image creation/sharing). We argue that categorizing non-consensual image sharing, showing and distributing as image-based sexual harassment and abuse rather than ‘sexting’ is an important conceptual shift to enable young people, schools, parents and all relevant stakeholders to recognize and address new forms of technology-facilitated sexual violence

Preserving professional credibility: grounded theory study of medical trainees’ requests for clinical support

Objective To develop a conceptual framework of the influences on medical trainees’ decisions regarding requests for clinical support from a supervisor