The Okavango; a river supporting its people, environment and economic development

The Okavango basin comprises the Cuito and Cubango active catchment areas in Angola, in addition to the Kavango–Okavango non-active catchment in northern Namibia and Botswana. The Okavango River water and its ecosystem resources are critically important sources of livelihoods for people in the basin. Pressures from livelihoods and development are already impacting on the environment. These pressures may increase in the future due to the rapid increase in population, the peace process and associated resettlement activities in Angola, and major development initiatives in Botswana and Namibia. For instance, possible future increase in water abstraction from the Okavango River may affect the long-term environmental sustainability of the Okavango Delta by minimizing channel shifting and thereby reducing spatial biodiversity. The paper argues that while conservation of the natural environment is critical, the pressing development needs must be recognized. The reduction of poverty within the basin should be addressed in order to alleviate adverse effects on the environment. The paper recommends that the development of sustainable tourism and community-based natural resource management initiatives may be appropriate strategies for reaching the Millennium Development Goals of poverty alleviation and achievement of environmental sustainability in the Okavango Basin. These initiatives have a comparative advantage in this area as demonstrated by the performance of the existing projects

Martian Dust Devil Detection with the Beagle 2 Wind Sensor

Beagle 2 is a Mars lander expected to land on December 26th 2003. The Beagle 2 wind sensor utilizes an ultrasonic technique, which is unique to planetary landers, and with other sensors will identify, and characterise dust devils

Surface Profiling of Natural Dust Devils

We present results from the first high-resolution near-surface profiles conducted on dust devil wind fields. These results are integrated with extensive geologic mapping to understand the factors that influence vortex generation and erosive efficacy

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

Trace gas transport in the subsurface of Mars

The ExoMars Trace Gas Orbiter (TGO) will have the capability of detecting and characterizing a broad suite of trace gases in the atmosphere of Mars. Interpreting the results of this mission will require an understanding of how these trace gases are transported from their sources, which may be deep underground, to the atmosphere. Here we present results of modeling designed to measure the timescales of release from putative subsurface methane sources. These transport timescales are far longer than mixing times in the atmosphere and could be up to 10 million years

'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

Mars simulated exposure and the characteristic Raman biosignatures of amino acids and halophilic microbes

Though Raman bands of α-amino acids (AA) are well documented, often only the strongest intensity bands are quoted as identifiers (e.g. Jenkins et al., 2005; De Gelder et al., 2007; Zhu et al., 2011). Unknown regolith mixtures on Mars-sampling missions could obscure these bands. Here the case is made for determining, via a statistical method, sets of characteristic bands to be used as identifiers, independent of band intensity or number of bands (Rolfe et al., 2016). AA have upwards of 25 potentially identifying bands and this method defines sets of 10–19 bands per AA. Examination of AA-doped Mars-like basalt resulted in a maximum of eight bands being identified, as some characteristic bands were obscured by mineral bands, including the strongest intensity band in some cases. This proved the need for characteristic bands to be defined, enabling successful identification of AA. The ESA ExoMars Rover mission will crush and then pass the sample to the Raman Laser Spectrometer. We crushed a Mars-like basalt to a similar grain size expected to be created by the rover. Our samples were doped with 1 % (by weight) AA samples, resulting in no detection of AA, because of loss of original spatial context and spaces between the grains. We recommend that Raman spectroscopy on future missions should be conducted before the sample is crushed. Halite-entombed halophilic microbes, known to survive being entombed, were exposed to Mars-like surface (including temperature, pressure, atmospheric composition and UV) and freeze-thaw cycle (plus pressure and atmospheric composition) conditions. This test on the survival of the microbes showed that survival rates quickly deteriorated in surface conditions, but freeze-thaw cycle samples had well preserved Raman biosignatures, indicating that similar signatures could be detectable on Mars if similar life persists in evaporitic material or brines today

A close encounter with a terrestrial dust devil

We report on an extremely well characterised encounter with a terrestrial dust devil, and its comparison with martian dust devils

Snapchat memory and youth digital sexual cultures: mediated temporality, duration and affect

This paper explores how the photo and video-sharing app Snapchat mediates memory and intimacy, using focus group data with 18-year-olds. We use Bergson’s ideas about duration and Deleuze and Guattari’s theories of affect and assemblages to think about how the digital affordances of ‘disappearing’ Snapchat technology reshape memory and intimacy in youth sexual and relationship cultures. Our findings illustrate that Snapchat offers a temporal fastness and ephemerality – but also forms of fixity through the screenshotting of ‘disappearing’ snaps. Because judgement from peers cannot take place publicly within the app, offline discussion of Snapchat activity gains significant traction, making interview accounts of Snapchat use highly relevant. Our analysis of discussions of ‘Snapchat memory’ explores the gendered aspects of performative ‘showing off’ and sexual scrutiny, considering what happens when snaps do not disappear and how Snap exchanges can be used as relationship currency; for instance exploring how some participant’s challenged Snapchat related slut shaming through their uses of humour. Overall we show how Snapchat is mediating youth intimacy, highlighting the reconditioning that occurs between and across the digital world of Snapchat and the physical world of its youth users – evidence of the blurring of online and offline experiences that disrupts digital dualisms