The subjective experiences of students with invisible disabilities at a historically disadvantaged university.

Background: Despite policies that promote inclusivity of students with various challenges, students with invisible disabilities at higher learning institutions may encounter various levels of stigma and marginalisation. This primarily stems from a lack of awareness about what invisible disabilities encompass, and very importantly, how they affect those who live with them. Objective: This study explored the subjective experiences of students with invisible disabilities at a historically disadvantaged university. Method: This study used a qualitative approach to facilitate the exploration of the subjective experiences of students with invisible disabilities. Twelve students with invisible disabilities were interviewed online via Google Meet platform, using semi-structured interviews. Interviews were transcribed verbatim and analysed using a thematic analysis. Results: Three thematic domains were identified, invisibly disabled students' subjective experiences within the context of (1) home and community, (2) university life and (3) support offered at their university. Conclusion: This study's findings highlight the importance of awareness of invisible disabilities in higher education. Support for students with invisible disabilities, and breaking down the barriers to it, can compound better experiences in the lives of those who have invisible disabilities. Targeted awareness campaigns could contribute to more mindful learning and teaching practices and improve the overall experience of these students. This information can also be used to promote awareness of students with invisible disabilities in higher education institutions.

Radon-222 exhalation from open ground on and around a uranium mine in the wet-dry tropics.

Radon-222 exhalation from the ground surface depends upon a number of variables such as the 226Ra activity concentration and its distribution in soil grains; soil grain size; soil porosity, temperature and moisture; atmospheric pressure, rainfall and temperature. In this study, 222Rn exhalation flux density measurements within and around the Ranger uranium mine in northern Australia were performed to investigate the effect of these variables within a tropical region. Measurements were taken at the waste rock dumps, ore stockpiles, mine pits, and at sites where effluent water with elevated 226Ra concentration has been spray irrigated over land, as well as at sites outside the mine. The sites selected represented a variety of geomorphic regions ranging from uranium-bearing rocks to ambient soils. Generally, wet season rains reduced 222Rn exhalation but at a few sites the onset of rains caused a step rise in exhalation flux densities. The results show that parameters such as 226Ra activity concentration, soil grain size and soil porosity have a marked effect on 222Rn flux densities. For similar geomorphic sites, 226Ra activity concentration is a dominant factor, but soil grain size and porosity also influence 222Rn exhalation. Surfaces with vegetation showed higher exhalation flux densities than their barren counterparts, perhaps because the associated root structure increases soil porosity and moisture retention. Repeated measurements over one year at eight sites enabled an analysis of precipitation and soil moisture effects on 222Rn exhalation. Soil moisture depth profiles varied both between seasons and at different times during the wet season, indicating that factors such as duration, intensity and time between precipitation events can influence 222Rn flux densities considerably.