Portable breathing system

A semiclosed-loop rebreathing system is discussed for use in a hostile environment. A packed bed regenerative heat exchanger providing two distinct temperature humidity zones of breathing gas with one zone providing cool, relatively dry air and the second zone providing hot, moist air is described

Fairytale authenticity: historic city tourism, Harry Potter, medievalism and the magical gaze

This article makes an original contribution to debates about authenticity by asking how tourist experiences of the medieval historic environment are linked to fairytales, providing a new way for tourists to imaginatively authenticate heritage. The architecture of some historic cities is preponderantly medieval, an era which is strongly associated with fairytales. Magical-historical double affectiveness has been compounded in the collective imagination by modern fairytales such as the fantasy Harry Potter and Game of Thrones which employ historic city locations and faux-medieval settings, establishing a fluid magi-heritage simulacrum. This is concretised by the appearance in many historic cities of evidence of magical placemaking and staged magical authenticity, such as wizarding shops. The study used a visual methodology to examine 14 historic cities including Oxford, Cambridge, Bath, York, and Canterbury, demonstrating how the magical gaze employs fairytale schemata to imaginatively authenticate places. The findings illustrated how heritage tourists serendipitously encountered the medieval-fairytalesque, unfolding the agency of monumental cathedrals and castles and discovering stories and the historicisation of mythology within the extraordinary-ordinary streetscape. The research findings imply that in an era when the fantasy genre is increasingly popular, the experiential authenticity of heritage tourists may be enhanced by the ‘heritage marvellous.

Edge-enhanced disruptive camouflage impairs shape discrimination

Disruptive colouration (DC) is a form of camouflage comprised of areas of pigmentation across a target’s surface that form false edges, which are said to impede detection by disguising the outline of the target. In nature, many species with DC also exhibit edge enhancement (EE); light areas have lighter edges and dark areas have darker edges. EE DC has been shown to undermine not only localisation but also identification of targets, even when they are not hidden (Sharman, Moncrieff, & Lovell, 2018). We use a novel task, where participants judge which “snake” is more “wiggly,” to measure shape discrimination performance for three colourations (uniform, DC, and EE DC) and two backgrounds (leafy and uniform). We show that EE DC impairs shape discrimination even when targets are not hidden in a textured background. We suggest that this mechanism may contribute to misidentification of EE DC targets

Dissociating the effect of disruptive colouration on localisation and identification of camouflaged targets

Disruptive camouflage features contrasting areas of pigmentation across the animals’ surface that form false edges which disguise the shape of the body and impede detection. In many taxa these false edges feature local contrast enhancement or edge enhancement, light areas have lighter edges and dark areas have darker edges. This additional quality is often overlooked in existing research. Here we ask whether disruptive camouflage can have benefits above and beyond concealing location. Using a novel paradigm, we dissociate the time courses of localisation and identification of a target in a single experiment. We measured the display times required for a stimulus to be located or identified (the critical duration). Targets featured either uniform, disruptive or edge enhanced disruptive colouration. Critical durations were longer for identifying targets with edge enhanced disruptive colouration camouflage even when presented against a contrasting background, such that all target types were located equally quickly. For the first time, we establish empirically that disruptive camouflage not only conceals location, but also disguises identity. This shows that this form of camouflage can be useful even when animals are not hidden. Our findings offer insights into how edge enhanced disruptive colouration undermines visual perception by disrupting object recognition

Expanding worlds: place and collaboration in (and after) the ‘text-as-spatial-event’

This short position paper seeks to explore the collaborative role of place in the unfolding of the ‘text-as-spatial-event’ (Hones 2008) via the expansion of the extra-textual. The work presented here forms part of an ongoing interdisciplinary collaboration initiated by our meeting at the ‘Literary Geographies of Collaboration’ roundtable, held at Emmanuel College, Cambridge, in August 2018. While each of us has worked with literary texts in previous analyses of place and performativity within our ‘home’ disciplines, cultural geography (Thurgill 2018) and tourism studies (Lovell and Bull 2017; Lovell 2019), this collaboration has allowed us to reconsider the parameters of influence involved in the reading of literary texts, and moreover, to think about the ways in which the extra-textual might be used to show an expansion or development of reading(s) and of space(s) that continues far beyond the text itself. In what follows, we set out place’s collaborative role in (and after) the ‘text-as-spatial- event’ and outline the conditions for the oscillation of affect at work in the re-imagining of extra-literary environments. This ‘oscillation of affect’ sees the sights, sounds, smells and feel of places that readers experience prior to engaging with literary texts, and which work to inform their understanding of the text’s geography, undergo a transformative process through the ‘text-as-spatial-event’ so that places can come to be seen as displaying the affective properties of the text itself. We suggest that this shifting of affect from shaping literary to actual-world experiences may even prompt some readers to locate extra-literary experiences in actual-world places not associated with the novel but which feel like they share the same affective environment

FACTORS INFLUENCING PARTICIPATION IN AGRICULTURAL LAND PRESERVATION PROGRAMS

We analyze the factors influencing participation in Maryland's farmland preservation programs using data from a survey of agricultural landowners and spatial data on individual parcels. Factors influencing participation included distance from a major city, proximity to preserved parcels, length of family ownership, whether a child plan to continue farming and share of income from farming.Land Economics/Use,

New H_(2)O masers in Seyfert and FIR bright galaxies: III. The southern sample

Context. A relationship between the water maser detection rate and far infrared (FIR) flux densities was established as a result of two 22 GHz maser surveys in a complete sample of galaxies (Dec > −30°) with flux densities of >50 Jy and >30 Jy. Aims. We attempted to discover new maser sources and investigate the galaxies hosting the maser spots by extending previous surveys to southern galaxies with particular emphasis on the study of their nuclear regions. Methods. A sample of 12 galaxies with Dec 50 Jy was observed with the 70-m telescope of the Canberra deep space communication complex (CDSCC) at Tidbinbilla (Australia) in a search for water maser emission. The average 3σ noise level of the survey was 15 mJy for a 0.42 km s^(−1) channel, corresponding to a detection threshold of ∼0.1 L_☉ for the isotropic maser luminosity at a distance of 25 Mpc. Results. Two new detections are reported: a kilomaser with an isotropic luminosity L_(H_(2)O) ~ 5 L_☉ in NGC 3620 and a maser with about twice this luminosity in the merger system NGC 3256. The detections have been followed-up by continuum and spectral line interferometric observations with the Australia Telescope Compact Array (ATCA). In NGC 3256, a fraction (about a third) of the maser emission originates in two hot spots associated with star formation activity, which are offset from the galactic nuclei of the system. The remaining emission may originate in weaker centres of maser activity distributed over the central 50". For NGC 3620, the water maser is coincident with the nuclear region of the galaxy. Our continuum observations indicate that the nature of the nuclear emission is probably linked to particularly intense star formation. Including the historical detection in NGC 4945, the water maser detection rate in the southern sample is 15% (3/20), consistent with the northern sample. The high rate of maser detections in the complete all-sky FIR sample (23%, 15/65) confirms the existence of a link between overall FIR flux density and maser phenomena. A relation between H_(2)O and OH masers in the FIR sample is also discussed

Simulated authenticity: storytelling and mythic space on the hyper-frontier in Buffalo Bill’s Wild West and Westworld.

This article explores how the mythic, nineteenth-century American frontier is authenticated by postmodern forms of storytelling. The study examines accounts of William Cody’s extensive 1902–1903 Buffalo Bill’s Wild West tours in the United Kingdom and the futuristic television series, HBO’s Westworld (2016–), which is set in an android-hosted theme park. Comparing the semiotics of the two examples indicates how over a century apart, the authentication of the myth involves repeating motifs of setting, action and character central to tourist fantasies. The research illustrates how some elements of the myth seem to remain fixed but are negotiable. It is suggested that both examples are versions of a ‘hyper-frontier’, a nostalgic yet progressive, intertextual retelling of the American West and its archetypal characters, characterised by advanced technology. The implications for tourism are that simulating the authenticity of the frontier myth creates doubts in its veracity paradoxically due to its lifelikeness

A study of the intensity of the self-broadened fundamental band of hydrogen chloride

Intensity study of self-broadened fundamental band of hydrogen chlorid

Provisional specification for satellite time in a geomagnetic environment

Satellites in geosynchronous orbit were experiencing operational anomalies. These anomalies are believed to be due to the environment charging the spacecraft surfaces to a point where discharges occur. In designing future satellites for long term operation at geosynchronous altitude, it is important that designers have a specification that will give the total time per year, the particle flux density and particle energies that their satellites can be expected to encounter in these substorm environmental conditions. The limited data currently available on the environmental conditions are used to generate the provisional specification given in this report