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"Cooper, Gary"
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Victimization in the school and the workplace: Are there any links?
We examine whether reported roles in school bullying, and victimization in the workplace, are connected; the influence of victim coping strategies at school; and sex differences. A questionnaire was completed by 5,288 adults from various workplace venues in Great Britain. We analysed two questions on school experiences (participant role; coping strategies if bullied) and questions on workplace bullying (experiences of being bullied). We found a significant relationship between reported roles in school bullying, and experience of workplace victimization. The highest risk of workplace victimization was for those who were both bullies and victims at school (bully/victims), followed by those who were only victims. An analysis of relative risk of workplace bullying, given being a victim at school plus using various coping strategies, revealed an increased risk for the strategies ‘tried to make fun of it’, and ‘did not really cope’. Women were at slightly higher risk of getting bullied at work, but there were no interactions with roles at school, and only one interaction with coping strategies. This is the first study to report an association between school and workplace bullying. Victims at school are more at risk of workplace victimization, but the especial risk for ‘bully/victims’ supports other indications that this particular category of school pupils should be a focus of concern. The findings also suggest that school pupils who consistently cannot cope with bullying, or try to make fun of the bullying, are more at risk for later problems in the workplace. However, associations are modest; many victims of school bullying are not being victimized in later life, and the results also suggest important contextual or environmental effects on risks of victimization.
Journal Article
Methods for Dispersal of Precipitated Calcium Carbonate for Stratospheric Aerosol Injection
Two methods for the laboratory-scale formation of aerosols of nanosized particles of precipitated calcium carbonate (PCC), for potential use in Stratospheric Aerosol Injection (SAI), a Solar Radiation Management (SRM) technique, are described. The first uses the coarse fluidization of bulk PCC in a simple vessel, followed by dispersal using a commercially available two-fluid nozzle. The manufacturer’s measured particle mass distribution for the bulk material, and sprayed aerosol particle mass distributions are compared, indicating that the sprayed particles are well separated in spite of a notoriously problematic agglomeration tendency. The method is suitable for scale-up. A second dispersal method, useful for small laboratory experiments, using liquid carbon dioxide as a dispersant as well as spray propellant gave similar results. The mass mode diameters measured here (0.89 to 1.4 μm) differ from that stated by the manufacturer (0.7 μm), but the distributions are consistent in showing complete separation of the particles.
Journal Article
Trying Out Genes for Size: Experiential Learning in the High School Classroom
The National Science Foundation's GK—12 program provides a unique opportunity for STEM collaboration between the K—12 classroom and university research. This partnership benefits students through experiential learning, exposure to research, exceptional mentorship, and preparation for postsecondary education. Additionally, researchers gain valuable skills by explaining difficult scientific concepts to high school students and broadening their exposure to secondary education. We present graduate-research-based activities focused on understanding the genetic causes of Down syndrome. Modification of these activities could accommodate educational levels from middle school to entry-level college biology. This lesson involves several biological and data-collecting techniques. These experiential activities help students understand genetics and Down syndrome, and introduce basic scientific methodology and techniques useful for postsecondary education.
Journal Article
Marine cloud brightening
The idea behind the marine cloud-brightening (MCB) geoengineering technique is that seeding marine stratocumulus clouds with copious quantities of roughly monodisperse sub-micrometre sea water particles might significantly enhance the cloud droplet number concentration, and thereby the cloud albedo and possibly longevity. This would produce a cooling, which general circulation model (GCM) computations suggest could-subject to satisfactory resolution of technical and scientific problems identified herein-have the capacity to balance global warming up to the carbon dioxide-doubling point. We describe herein an account of our recent research on a number of critical issues associated with MCB. This involves (i) GCM studies, which are our primary tools for evaluating globally the effectiveness of MCB, and assessing its climate impacts on rainfall amounts and distribution, and also polar sea-ice cover and thickness; (ii) high-resolution modelling of the effects of seeding on marine stratocumulus, which are required to understand the complex array of interacting processes involved in cloud brightening; (iii) microphysical modelling sensitivity studies, examining the influence of seeding amount, seed-particle salt-mass, air-mass characteristics, updraught speed and other parameters on cloud-albedo change; (iv) sea water spray-production techniques; (v) computational fluid dynamics studies of possible large-scale periodicities in Flettner rotors; and (vi) the planning of a three-stage limited-area field research experiment, with the primary objectives of technology testing and determining to what extent, if any, cloud albedo might be enhanced by seeding marine stratocumulus clouds on a spatial scale of around 100×100 km. We stress that there would be no justification for deployment of MCB unless it was clearly established that no significant adverse consequences would result. There would also need to be an international agreement firmly in favour of such action.
Journal Article
Preliminary results for salt aerosol production intended for marine cloud brightening, using effervescent spray atomization
The large-scale production of vast numbers of suitable salt nuclei and their upward launch is one of the main technological barriers to the experimental testing of marine cloud brightening (MCB). Very promising, though not definitive, results have been obtained using an adapted version of effervescent spray atomization. The process is simple, robust and inexpensive. This form of effervescent spraying uses only pressurized water and air sprayed from small nozzles to obtain very fine distributions. While it is far from optimized, and may not be the best method if full deployment is ever desired, we believe that even in its present form the process would lend itself well to preliminary field test investigations of MCB. Measurements obtained using standard aerosol instrumentation show approximately lognormal distributions of salt nuclei with median diameters of approximately 65nm and geometric standard deviations slightly less than2. However, these measurements are not in agreement with those based on scanning electron microscopy imaging of collected particles, an observation that has not yet been explained. Assuming the above distribution, 1015 particles per second could be made with 21kW of spray power, using approximately 200 nozzles. It is envisioned that existing snow making equipment can be adapted to launch the nuclei 60100m into the air, requiring approximately 20kW of additional power.
Journal Article
The azygos lobe and vein: interesting and typical clinical image
On chest radiographs, azygos fissure (azygos fissure in figure 1 ) is visible as a fine convex line and its upper portion has triangular shape due to extrapleural areolar tissue and lower portion has tear-shaped shadow due to azygos vein (azygos vein in figure 1 ).
Journal Article