Investigation of REST-Class Hypersonic Inlet Designs

Rectangular-to-elliptical shape-transition (REST) inlets are of interest for use on scramjet engines because they are efficient and integrate well with the forebody of a planar vehicle. The classic design technique by Smart for these inlets produces an efficient inlet but the complex three-dimensional viscous effects are only approximately included. Certain undesirable viscous features often occur in these inlets. In the present work, a design toolset has been developed which allows for rapid design of REST-class inlet geometries and the subsequent Navier-Stokes analysis of the inlet performance. This gives the designer feedback on the complex viscous effects at each design iteration. This new tool is applied to design an inlet for on-design operation at Mach 8. The tool allows for rapid investigation of design features that was previously not possible. The outcome is that the inlet shape can be modified to affect aspects of the flow field in a positive way. In one particular example, the boundary layer build-up on the bodyside of the inlet was reduced by 20% of the thickness associated with the classically designed inlet shape

Taboo tattoos? A study of the gendered effects of body art on consumers' attitudes toward visibly tattooed front line staff

The purpose of this experiment is to examine the gendered effects of body art on consumers’ attitudes toward visibly tattooed employees. We analyse the reaction of 262 respondents with exposure to male and female front line staff in two distinct job contexts: a surgeon and an automobile mechanic. The results demonstrate differences on three dimensions: a) job context, b) sex of face and c) stimulus (i.e., tattooed or not). We demonstrate significant interaction effects on those three dimensions, and our findings point to the intersectionality of gender-based and tattoo-based discrimination. Consumers have a negative reaction to body art, but perceptions of tattoos on male and female front line staff differ significantly. A key marketing challenge is how to balance employees’ individual rights to self-expression and at the same time cater to consumers’ expectations regarding appearance of staff. Our study forms the basis for this debate that is only just emerging.PostprintPeer reviewe

The academic game: Compliance and resistance in universities

This article draws on the sociology of Bourdieu to explore how academics respond to managerialist imperatives. Bourdieu’s metaphor of the game is applied to a case study of a regional Australian university, which underwent significant changes in 2007, the most notable being the introduction of performance appraisals. In-depth interviews (N=20) reveal evidence of symbolic violence: staff compliance with and complicity in the changes. This is evident in the way that the interviewees, mostly early career academics, chose to play the game by concentrating their efforts on increasing their capital within the new order. To further support this argument, signs of resistance to the new regime were explored. Findings show that vocal resistance was sparse with silence, neglect and exit being the more realistic options. The article concludes that it is academics’ illusio, their unwavering commitment to the game, which neutralizes resistance by pitting colleagues against each other

Playing the game: academics have bought into the competition and become complicit in their exploitation

The managerialist logic that has permeated universities has had a clear impact on academic work. To Senia Kalfa, Adrian Wilkinson and Paul J. Gollan, academia has become like a game, with academics competing with each other for just a handful of permanent positions and focused completely on accumulating the capital (publications, grant income, etc.) needed to secure one. Rather than resisting the demands placed upon them, academics have primarily complied and in doing so become complicit in their own exploitation. This raises significant questions about resistance in the academy; unions may not be powerful enough to subvert the managerialist logic, highlighting a need for other avenues for facilitating challenging voices

Financial cost of lymphedema borne by women with breast cancer

Psycho-Oncology Published by John Wiley & Sons Ltd.Objective: Our study examines the financial cost of lymphedema following a diagnosis of breast cancer and addresses a significant knowledge gap regarding the additional impact of lymphedema on breast cancer survivors. Methods: An online national survey was conducted with 361 women who had either breast cancer without lymphedema (BC) (group 1, n = 209) or breast cancer with lymphedema (BC+LE) (group 2, n = 152). Participant recruitment was supported by the Breast Cancer Network Australia and the Australasian Lymphology Association. Results: Both breast cancer and lymphedema result in significant out-of-pocket financial costs borne by women. Of patients with BC+LE, 80% indicated that their breast cancer diagnosis had affected them financially compared with 67% in the BC group (P \u3c .020). For patients with lymphedema, over half (56%) indicated that this specific additional diagnosis to their breast cancer affected them financially and that costs increased with lymphedema severity. The cost of compression garments formed a large proportion of these costs (40.1%). The average number of attendances to a therapist each year was 5.8 (range, 0-45). Twenty-five patients (16.4%) had an episode of cellulitis in the past year. The incidence of cellulitis was 7.7% in 91 patients with subclinical or mild lymphedema compared with 29.5% of 61 patients with more extensive lymphedema (P \u3c .001). The average out-of-pocket financial cost of lymphedema care borne by women was A$977 per annum, ranging from A$207 for subclinical lymphedema to over A$1400 for moderate or severe lymphedema. Conclusions: This study identifies an additional detrimental effect of lymphedema on women in terms of financial costs

Voices unheard : employee voice in the new century

The concept of employee voice has attracted considerable attention in research since the 1980s primarily in the fields of Employment Relations/Human Resource Management (ER/HRM) and Organisational Behaviour (OB). Each of these disciplines focuses on different aspects of employee voice, the former examining the mechanisms for employees to have \u27a say\u27 in organisational decision-making (Freeman, Boxall, & Haynes, 2007; Gollan, Kaufman, Taras, & Wilkinson, 2015; Wilkinson & Fay, 2011) and the latter considering voice as an \u27extra-role upward communication behaviour\u27 (Morrison, 2014, p. 174) with the intent to improve organizational functioning. The purpose of voice is seen by each of these disciplines in a different way. ER/HRM perspectives are underpinned by the assumption that it is a fundamental democratic right for workers to extend a degree of control over managerial decision-making within an organisation (Kaufman, 2015; Wilkinson, Gollan, Lewin, & Marchington, 2010). Thus, everyone should have a voice and a lack of opportunities to express that voice may adversely affect workers\u27 dignity. In contrast, OB perspectives are underpinned more by a concern with organisational improvements, therefore leaving it much more to managerial discretion to reduce or change existing voice arrangements due to, for example, an economic downturn (Barry & Wilkinson, 2016)

Stomatal responses of Eucalyptus species to elevated CO2 concentration and drought stress

Five species of Eucalyptus (E. grandis, E. urophylla, E. camaldulensis, E. torelliana, and E. phaeotrica), among the ten species most commonly used in large scale plantations, were selected for studies on the effects of elevated CO2 concentration [CO2] and drought stress on stomatal responses of 2.5-month old seedlings. The first three species belong to the subgenus Smphyomyrtus, whereas the fourth species belongs to the subgenus Corymbia and E. phaeotrica is from the subgenus Monocalyptus. Seedlings were grown in four pairs of open-top chambers, arranged to have 2 plants of each species in each chamber, with four replications in each of two CO2 concentrations: 350 ± 30 mumol mol-1 and 700 ± 30 mumol mol-1. After 100 days in the chambers, a series of gas exchange measurements were made. Half the plants in each chamber, one plant per species per chamber, were drought-stressed by withholding irrigation, while the remaining plants continued to be watered daily. Drought stress decreased stomatal conductance, photosynthesis and transpiration rates in all the species. The effect of drought stress on stomatal closure was similar in both [CO2]. The positive effects of elevated [CO2] on photosynthesis and water use efficiency were maintained longer during the stress period than under well-watered conditions. The photosynthetic rate of E. phaeotrica was higher even in the fourth day of the drought stress. Drought stress increased photoinhibition of photosynthesis, as measured by chlorophyll fluorescence, which varied among the species, as well as in relation to [CO2]. The results are in agreement with observed differences in stomatal responses between some eucalyptus species of the subgenera Symphyomyrtus and Monocalyptus

Effect of Citalopram on Emotion Processing in Humans:A Combined 5-HT [C]CUMI-101 PET and Functional MRI Study

A subset of patients started on a selective serotonin reuptake inhibitor (SSRI) initially experience increased anxiety, which can lead to early discontinuation before therapeutic effects are manifest. The neural basis of this early SSRI effect is not known. Presynaptic dorsal raphe neuron (DRN) 5-HT1A receptors are known to play a critical role in affect processing. Thus we investigated the effect of acute citalopram on emotional processing and the relationship between DRN 5-HT1A receptor availability and amygdala reactivity. Thirteen (mean age 48±9 years) healthy male subjects received either a saline or citalopram infusion intravenously (10 mg over 30 min) on separate occasions in a single-blind, random order, cross-over design. On each occasion, participants underwent a block design face-emotion processing task during fMRI known to activate the amygdala. Ten subjects also completed a positron emission tomography (PET) scan to quantify DRN 5-HT1A availability using [(11)C]CUMI-101.Citalopram infusion when compared to saline resulted in a significantly increased bilateral amygdala responses to fearful vs. neutral faces (Left p=0.025; Right p=0.038 FWE-corrected). DRN [(11)C]CUMI-101availability significantly positively correlated with the effect of citalopram on the left amygdala response to fearful faces (Z=2.51, p=0.027) and right amygdala response to happy faces (Z=2.33, p=0.032). Our findings indicate that the initial effect of SSRI treatment is to alter processing of aversive stimuli, and that this is linked to DRN 5-HT1A receptors in line with evidence that 5-HT1A receptors have a role in mediating emotional processing