The Mediating and Moderating Effects of Coping Mechanisms Following High School Victimization

Victimization from bullying has become a more serious issue as available avenues for bullying have increased and as the media has been alerted to the devastating effects of the phenomenon. Victimization has been linked to increased externalizing and internalizing disorders including depression, anxiety, stress, and at its worst suicide. Research has been focused on the negative outcomes following victimization, with some authors only recently examining the buffering or exacerbating effects of coping mechanisms. Participants (n=642) from a moderately sized southeastern university completed a survey to examine problem-focused and emotion-focused coping as potential moderators and maladaptive coping as a potential mediator between retrospective reports of victimization and depression, anxiety, and stress, and reasons for living. The hypothesis concerning maladaptive coping as a mediator was supported. Implications and limitations are also discussed. Results suggest that maladaptive coping may be a key mechanism explaining the impact of bullying on outcomes years after victimization

Slipcasting of MAX phase tubes for nuclear fuel cladding applications

As a proof of concept, tubes of Ti3SiC2 MAX phase were slipcast in order to investigate its potential for the fabrication of fuel cladding for nuclear reactors. A slip consisting of 46% dry weight basis (dwb) water, 4% dwb polyethyleneimine (PEI), 0.5% dwb methylcellulose was used to cast the tubes, which were then sintered for 2 h under vacuum at 1450 °C. Silicon loss was observed at surface which resulted in the formation of TiC. The hoop stress to destruction of the tubes was measured and achieved a maximum of 9.1 ± 2.2 MPa/mm of tube thickness

Laser sintering of electrophoretically deposited (EPD) Ti3SiC2 MAX phase coatings on titanium

Ti 3 SiC 2 was deposited onto titanium substrates using electrophoretic deposition; a 4.3 wt% suspension of Ti 3 SiC 2 in water at pH 9 was used with 10 V field applied across the substrates. After 10 min of deposition, the coating surface density was 1.89 ± 0.26 mg/cm 2 . The thin coatings were then rapidly densified using a Renishaw AM250 3D printing laser to scan the surface. Cross sections of the substrate post sintering, showed the coating thickness to be 10–30 μm and densified with silicon loss constrained to the surface, although the overall coverage and adhesion varies. Preliminary Raman spectroscopy results suggest some MAX phase remains after sintering, but further characterisation is required to confirm

Orion EFT-1 Catalytic Tile Experiment Overview and Flight Measurements

This paper describes the design and results of a surface catalysis flight experiment flown on the Orion Multipurpose Crew Vehicle during Exploration Flight Test 1 (EFT1). Similar to previous Space Shuttle catalytic tile experiments, the present test consisted of a highly catalytic coating applied to an instrumented TPS tile. However, the present catalytic tile experiment contained significantly more instrumentation in order to better resolve the heating overshoot caused by the change in surface catalytic efficiency at the interface between two distinct materials. In addition to collecting data with unprecedented spatial resolution of the "overshoot" phenomenon, the experiment was also designed to prove if such a catalytic overshoot would be seen in turbulent flow in high enthalpy regimes. A detailed discussion of the results obtained during EFT1 is presented, as well as the challenges associated with data interpretation of this experiment. Results of material testing carried out in support of this flight experiment are also shown. Finally, an inverse heat conduction technique is employed to reconstruct the flight environments at locations upstream and along the catalytic coating. The data and analysis presented in this work will greatly contribute to our understanding of the catalytic "overshoot" phenomenon, and have a significant impact on the design of future spacecraft

Decentered doctoral pedagogy: a co-autoethnography of collaboration and critical, agentive induction

This paper problematizes the traditional relationship between a doctoral candidate and “supervisor” in terms of its power differential, often characterised as an asymmetric, hierarchical expert/novice dyad. Such a relationship can trap supervisory/advisory relationships in a “transmission” or “training” mode, with candidates receiving “instruction” from “experts”. Though a collaborative co-autoethnography, we offer vignettes of our experiences and reflections on the development of our supervisory relationship, and the impact this has on the production of doctoral work. We demonstrate how we can rethink, disrupt and disorient dominant conceptions of doctoral pedagogy, to build a more collaborative, collegial “decentred” approach to “supervisory/advisory” work. Drawing on interdisciplinary theoretical and conceptual resources, from cultural sociology, anthropology, organizational studies and education, we argue that the liminal spaces doctoral candidates pass through offer opportunities for relational, productive and decentred pedagogies. Such action possibilities allow supervisors/advisors to construct new ways of valuing candidates’ expertise, and so facilitate their critical inclusion into the academic community. The paper’s significance lies in the theorization of decentred doctoral pedagogy and its presentation of recommendations for doctoral pedagogic practices, that include a range of pedagogical principles and actions that the doctoral pedagogue might wish to consider

Prevention of bone mineral changes induced by bed rest: Modification by static compression simulating weight bearing, combined supplementation of oral calcium and phosphate, calcitonin injections, oscillating compression, the oral diophosphonatedisodium etidronate, and lower body negative pressure

The phenomenon of calcium loss during bed rest was found to be analogous to the loss of bone material which occurs in the hypogravic environment of space flight. Ways of preventing this occurrence are investigated. A group of healthy adult males underwent 24-30 weeks of continuous bed rest. Some of them were given an exercise program designed to resemble normal ambulatory activity; another subgroup was fed supplemental potassium phosphate. The results from a 12-week period of treatment were compared with those untreated bed rest periods. The potassium phosphate supplements prevented the hypercalciuria of bed rest, but fecal calcium tended to increase. The exercise program did not diminish the negative calcium balance. Neither treatment affected the heavy loss of mineral from the calcaneus. Several additional studies are developed to examine the problem further

Maternal parity and its effect on adipose tissue deposition and endocrine sensitivity in the postnatal sheep

Maternal parity influences size at birth, postnatal growth and body composition with firstborn infants being more likely to be smaller with increased fat mass, suggesting that adiposity is set in early life. The precise effect of parity on fat mass and its endocrine sensitivity remains unclear and was, therefore, investigated in the present study. We utilised an established sheep model in which perirenal–abdominal fat mass (the major fat depot in the neonatal sheep) increases ∼10-fold over the first month of life and focussed on the impact of parity on glucocorticoid sensitivity and adipokine expression in the adipocyte. Twin-bearing sheep of similar body weight and adiposity that consumed identical diets were utilised, and maternal blood samples were taken at 130 days of gestation. One offspring from each twin pair was sampled at 1 day of age, coincident with the time of maximal recruitment of uncoupling protein 1 (UCP1), whilst its sibling was sampled at 1 month, when UCP1 had disappeared. Plasma leptin was lower in nulliparous mothers than in multiparous mothers, and offspring of nulliparous mothers possessed more adipose tissue with increased mRNA abundance of leptin, glucocorticoid receptor and UCP2, adaptations that persisted up to 1 month of age when gene expression for interleukin-6 and adiponectin was also raised. The increase in fat mass associated with firstborn status is therefore accompanied by a resetting of the leptin and glucocorticoid axis within the adipocyte. Our findings emphasise the importance of parity in determining adipose tissue development and that firstborn offspring have an increased capacity for adipogenesis which may be critical in determining later adiposity