582 research outputs found
Magnetic Properties of a Two-Dimensional Mixed-Spin System
Using a Langmuir-Blodgett (LB) synthesis method, novel two-dimensional (2D)
mixed-spin magnetic systems, in which each magnetic layer is both structurally
and magnetically isolated, have been generated. Specifically, a 2D Fe-Ni
cyanide-bridged network with a face-centered square grid structure has been
magnetically and structurally characterized. The results indicate the presence
of ferromagnetic exchange interactions between the Fe () and
Ni (S=1) centers.Comment: 2 pages, 3 figs., submitted 23rd International Conference on Low
Temperature Physics (LT-23), Aug. 200
Space shuttle: Longitudinal and lateral aerodynamic characteristics of the Convair B8B space shuttle booster with modifications
Hypervelocity wind tunnel tests of Convair B8B space shuttle booster and model configuration perturbation
‘It’s like equality now; it’s not as if it’s the old days’: an investigation into gender identity development and football participation of adolescent girls
This article explores the influence participating in football has on the development of adolescent girls’ gender identity, an area which currently lacks academic attention. Data were taken from an ethnographic study with a group of adolescent girls and boys and compared to Jeanes’ research. A social constructionist framework was deployed with links to both critical theory and feminist literature. Qualitative and participatory methods were used to fully engage with the complex issue of gender identity. The girls within this study were aware of the normative gender expectations linked to ‘being a female’ but did not find this restrictive. The girls moved between many changing identities and organised their ‘web of selves’ accordingly. The apparent need to measure success by the parameters of male standards created a barrier to girls’ identity development
High-Precision Scanning Water Vapor Radiometers for Cosmic Microwave Background Site Characterization and Comparison
The compelling science case for the observation of B-mode polarization in the
cosmic microwave background (CMB) is driving the CMB community to expand the
observed sky fraction, either by extending survey sizes or by deploying
receivers to potential new northern sites. For ground-based CMB instruments,
poorly-mixed atmospheric water vapor constitutes the primary source of
short-term sky noise. This results in short-timescale brightness fluctuations,
which must be rejected by some form of modulation. To maximize the sensitivity
of ground-based CMB observations, it is useful to understand the effects of
atmospheric water vapor over timescales and angular scales relevant for CMB
polarization measurements. To this end, we have undertaken a campaign to
perform a coordinated characterization of current and potential future
observing sites using scanning 183 GHz water vapor radiometers (WVRs). So far,
we have deployed two identical WVR units; one at the South Pole, Antarctica,
and the other at Summit Station, Greenland. The former site has a long heritage
of ground-based CMB observations and is the current location of the Bicep/Keck
Array telescopes as well as the South Pole Telescope. The latter site, though
less well characterized, is under consideration as a northern-hemisphere
location for future CMB receivers. Data collection from this campaign began in
January 2016 at South Pole and July 2016 at Summit Station. Data analysis is
ongoing to reduce the data to a single spatial and temporal statistic that can
be used for one-to-one site comparison.Comment: Published in Proc. SPIE. Presented at SPIE Astronomical Telescopes
and Instrumentation Conference 10708: Millimeter, Submillimeter, and
Far-Infrared Detectors and Instrumentation for Astronomy XI, June 2018. 10
pages, 11 figure
How to Lose Money in Derivatives: Examples from Hedge Funds and Bank Trading Departments
When learning becomes a fetish: the pledge, turn and prestige of magic tricks
It is our contention that the process of higher education could be read as a commodity and in both Marxian and Freudian assumptions, a fetish. Instrumental in this discussion are; Marx’s theorising of the commodity fetish (1867) that deceives by conflating the distinction between use and exchange value, and Freud’s (1927) re-visiting of his theory of fetishism, where he considers the fetish in the context of dealing with separation and loss in everyday life.
This paper highlights how the consequence of fetishised behaviour has led to violent outcomes, such as the policy decision to introduce a ‘Teaching Excellence Framework’ (TEF). We argue that the TEF may bring about the death of learning in HE and diminish the role of academic staff. Nevertheless, influenced by Winnicott, Cixous and Biesta, we offer a more hopeful ‘Teaching that is Good Enough Framework’
Elevated Incidence of Dental Caries in a Mouse Model of Cystic Fibrosis
Saliva bicarbonate constitutes the main buffering system which neutralizes the pH fall generated by the plaque bacteria during sugar metabolism. We found that the saliva pH is severely decreased in a mouse model of cystic fibrosis disease (CF). Given the close relationship between pH and caries development, we hypothesized that caries incidence might be elevated in the mouse CF model.). are enhanced at low pH values, we speculate that the decrease in the bicarbonate content and pH buffering of the saliva is at least partially responsible for the increased severity of lesions observed in the CF mouse
Dietary n-3 fatty acids have suppressive effects on mucin upregulation in mice infected with Pseudomonas aeruginosa
International audienceMucin hypersecretion and mucus plugging in the airways are characteristic features of chronic respiratory diseases like cystic fibrosis (CF) and contribute to morbidity and mortality. In CF, Pseudomonas aeruginosa superinfections in the lung exacerbate inflammation and alter mucus properties. There is increasing evidence that n-3 polyunsaturated fatty acids (PUFAs) exhibit anti-inflammatory properties in many inflammatory diseases while n-6 PUFA arachidonic acid (AA) favors inflammatory mediators such as eicosanoids prostaglandin E2 (PGE2) and leukotriene B4 (LTB4) that may enhance inflammatory reactions. This suggests that n-3 PUFAs may have a protective effect against mucus over-production in airway diseases. Therefore, we hypothesized that n-3 PUFAs may downregulate mucins expression. We designed an absolute real-time PCR assay to assess the effect of a 5-week diet enriched either with n-3 or n-6 PUFAs on the expression of large mucins in the lungs of mice infected by P. aeruginosa. Dietary fatty acids did not influence mucin gene expression in healthy mice. Lung infection induced an increase of the secreted gel-forming mucin Muc5b and a decrease of the membrane bound mucin Muc4. These deregulations are modulated by dietary fatty acids with a suppressive effect of n-3 PUFAs on mucin (increase of Muc5b from 19-fold up to 3.6 x 10(5)-fold for the n-3 PUFAs treated group and the control groups, respectively, 4 days post-infection and decrease of Muc4 from 15-fold up to 3.2 x 10(4)-fold for the control and the n-3 PUFAs treated groups, respectively, 4 days post-infection). Our data suggest that n-3 PUFAs enriched diet represents an inexpensive strategy to prevent or treat mucin overproduction in pulmonary bacterial colonization
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