Coping With Discrimination Among Mexican Descent Adolescents

The current research is designed to explore the relationship among discrimination stress, coping strategies, and self-esteem among Mexican descent youth (N = 73, age 11-15 years). Results suggest that primary control engagement and disengagement coping strategies are positively associated with discrimination stress. Furthermore, self-esteem is predicted by an interaction of primary control engagement coping and discrimination stress, such that at higher levels of discrimination stress, youth who engaged in more primary control engagement coping reported higher self-esteem. The authors’ findings indicate that Mexican descent youth are actively finding ways to cope with the common experience of negative stereotypes and prejudice, such that their self-esteem is protected from the stressful impact of discrimination and prejudice. Implications of these findings for Latino/a youth resilience are discussed

Reflectionless Sharp Bends and Corners in Waveguides Using Epsilon-Near-Zero Effects

Following our recent theoretical and experimental results that show how zero-permittivity metamaterials may provide anomalous tunneling and energy squeezing through ultranarrow waveguide channels, here we report an experimental investigation of the bending features relative to this counterintuitive resonant effect. We generate the required effectively-zero permittivity using a waveguide operating at the cut-off of its dominant mode, and we show how sharp and narrow bends may be inserted within the propagation channel without causing any sensible reflection or loss.Comment: 13 pages, 6 figure

The history and basic tenets of anthroposophical music therapy

The approach known as Anthroposophical Music Therapy (AnMt) was developed throughout the 20th century. In this paper we provide an historical and descriptive overview of the  foundations, techniques and methods of AnMt for readers who are not familiar with this model of music therapy training and practice. We trace AnMt's origins from the systematic application of music in curative education in Germany, Austria and Switzerland through to its use in many countries of the world, with training programmes available in German and English speaking countries currently.  We examined literature sources in German and English to glean information about the main foundations of this model. Course materials available from one programme of study were consulted to provide information about how this model is taught. This information was closely reviewed in order to be able to synthesise and present information about a. AnMt's development and current scope of practice, b. the contents of AnMt training, c. the therapeutic process in AnMt, and d. the use of music in AnMt. It is recommended that further efforts be undertaken from the leaders in AnMt, as well as the current professional associations in countries where it is practised, to consider the potential for its inclusion in the list of recognised trainings and models, if such a step would be considered useful for AnMt practitioners

Introduction: Negotiating Empowerment

This introductory article draws out some of the dimensions and dilemmas around women’s empowerment that are highlighted in the articles in this IDS Bulletin: the choices, the negotiations, the narratives and above all, the context of women’s lived experience. In doing so, we show that empowerment is a complex process that requires more than the quick and easy solutions often offered by development agencies. Much of the significant change happening in women’s lives takes place outside of the range of these conventional interventions. In conclusion, we suggest that for development agencies to really support women’s empowerment requires greater engagement with changing structures rather than accommodating women within the inequitable existing order, and a much deeper understanding of what makes change happen in their lives

A New Look at T Tauri Star Forbidden Lines: MHD Driven Winds from the Inner Disk

Magnetohydrodynamic (MHD) and photoevaporative winds are thought to play an important role in the evolution and dispersal of planet-forming disks. We report the first high-resolution ($\Delta v\sim$6\kms) analysis of [S II] $\lambda$4068, [O I] $\lambda$5577, and [O I] $\lambda$6300 lines from a sample of 48 T Tauri stars. Following Simon et al. (2016), we decompose them into three kinematic components: a high-velocity component (HVC) associated with jets, and a low-velocity narrow (LVC-NC) and broad (LVC-BC) components. We confirm previous findings that many LVCs are blueshifted by more than 1.5 kms$^{-1}$ thus most likely trace a slow disk wind. We further show that the profiles of individual components are similar in the three lines. We find that most LVC-BC and NC line ratios are explained by thermally excited gas with temperatures between 5,000$-$10,000 K and electron densities $\sim10^{7}-10^{8}$ cm$^{-3}$. The HVC ratios are better reproduced by shock models with a pre-shock H number density of $\sim10^{6}-10^{7}$ cm$^{-3}$. Using these physical properties, we estimate $\dot{M}_{\rm wind}/\dot{M}_{\rm acc}$ for the LVC and $\dot{M}_{\rm jet}/\dot{M}_{\rm acc}$ for the HVC. In agreement with previous work, the mass carried out in jets is modest compared to the accretion rate. With the likely assumption that the NC wind height is larger than the BC, the LVC-BC $\dot{M}_{\rm wind}/\dot{M}_{\rm acc}$ is found to be higher than the LVC-NC. These results suggest that most of the mass loss occurs close to the central star, within a few au, through an MHD driven wind. Depending on the wind height, MHD winds might play a major role in the evolution of the disk mass.Comment: 45 pages, 23 figures, and 7 tables, accepted by Ap

Nonlinear Control of Tunneling Through an Epsilon-Near-Zero Channel

The epsilon-near-zero (ENZ) tunneling phenomenon allows full transmission of waves through a narrow channel even in the presence of a strong geometric mismatch. Here we experimentally demonstrate nonlinear control of the ENZ tunneling by an external field, as well as self-modulation of the transmission resonance due to the incident wave. Using a waveguide section near cut-off frequency as the ENZ system, we introduce a diode with tunable and nonlinear capacitance to demonstrate both of these effects. Our results confirm earlier theoretical ideas on using an ENZ channel for dielectric sensing, and their potential applications for tunable slow-light structures

The effect of the new GMS contract on GP appointment provision in Wales: postal questionnaire survey of practice managers

<p>Abstract</p> <p>Background</p> <p>Access to health professionals is a key UK NHS priority, and meeting access targets is rewarded through the new General Medical Services (GMS) contract in the UK. We sought to determine the current state of appointment provision in Wales and any changes resulting from the need to meet indicators in the new GMS contract. We undertook a postal questionnaire study of practice managers in all general practices in Wales.</p> <p>Findings</p> <p>Valid responses were received from 396/505 (78.4%) practice managers. 361 (93.1%) practices reported that they had achieved the target for 2004/05. 104 (26%) practices reported that they were 100% open access/advanced access. The most frequent changes reported in response to the new GMS contract were offering more open or advanced access slots (237, 60%), more GP phone consultations (167, 42%), introducing a telephone triage system (100, 25%), introducing a minor illness clinic (76, 19%), and employing or training a nurse practitioner (59, 15%). 83% practice managers believed that patients were able to get an appointment at the time they need it either 'all of the time' or 'most of the time', and 70% that patients were able to get an appointment with the GP of choice either 'all of the time' or 'most of the time'.</p> <p>Conclusion</p> <p>This survey has demonstrated the current extent of appointment provision in Wales, and how changes have been driven by incentives. Whether these changes are in the best interests of either patients or doctors, or both, remains to be seen.</p

The Era of Chinese Global Hegemony: Denaturalizing Money in the Early Modern World

This article argues that the commodity “nature” ascribed to early modern money should be understood as an ideological effect of Chinese domination of the early modern global monetary system. In the three centuries before 1800, Chinese demand for silver anchored a global system that made silver valued by weight and fineness the apparently natural money of the world, just as it in late Ming and Qing China. We argue that this naturalization should be understood as resulting from Chinese power, and that the early modern era is perhaps best understood as an era of Chinese global hegemony. We follow the effects of this Chinese monetary hegemony through three different fields. First, we trace it through early modern English financiers and philosophers’ formulation of the ideal qualities of a universal money, deliberately based on the Chinese model. Second, we show the importance of Chinese demand for silver for evoking and determining the character of the British Empire in India. And finally, we show how officials naturalized silver as money in early modern Ottoman statecraft

Amyloid peptide mixtures: self-assembly, hydrogelation, nematic ordering and catalysts in aldol reactions

Morphological, spectroscopic and scattering studies of the self-assembly and aggregation process of mixtures of [RF]4 and P[RF]4 peptides (where: R = arginine; F = phenylalanine; P = proline), in solution and as hydrogels, were performed to obtain information about polymorphism. CD data confirmed a β-sheet secondary structure conformation for the solutions and TEM images revealed nanofibers with diameters of ~ 10 nm and micrometer lengths. SAXS curves were fitted using a mass fractal-component and a long cylinder shell form factor for the liquid samples, and only a long cylinder shell form factor for the gels. Increasing the P[RF]4 content in the systems leads to a reduction in cylinder radius and core density scattering, suggesting an increase in packing of the peptide molecules; however, the opposite effect was observed for the gels. Remarkably, the gels are birefringent, indicating nematic ordering of the gel fibrils. These compounds show potential as catalysts in the asymmetric aldol reactions, with cyclohexanone and p-nitrobenzaldehyde in aqueous media. A moderate conversion (36.9 %) and a good stereoselectivity (69:31) were observed for the system containing only [RF]4, and with the increase of the P[RF]4, a considerable decrease of the conversion was observed, suggesting differences in the self-assembly and packing factor. Rheological measurements were performed to determine the shear moduli for the soft gels. These model amyloid peptides demonstrate a range of tunable self-assembly behaviors and additionally have potential as biocatalysts

The Anti-Dipsogenic and Anti-Natriorexigenic Effects of Estradiol, but Not the Anti-Pressor Effect, Are Lost in Aged Female Rats

Estradiol (E2) inhibits fluid intake in several species, which may help to defend fluid homeostasis by preventing excessive extracellular fluid volume. Although this phenomenon is well established using the rat model, it has only been studied directly in young adults. Because aging influences the neuronal sensitivity to E2 and the fluid intake effects of E2 are mediated in the brain, we tested the hypothesis that aging influences the fluid intake effects of E2 in female rats. To do so, we examined water and NaCl intake in addition to the pressor effect after central angiotensin II treatment in young (3-4 months), middle-aged (10-12 months), and old (16-18 months) ovariectomized rats treated with estradiol benzoate (EB). As expected, EB treatment reduced water and NaCl intake in young rats. EB treatment, however, did not reduce water intake in old rats, nor did it reduce NaCl intake in middle-aged or old rats. The ability of EB to reduce blood pressure was, in contrast, observed in all three age groups. Next, we also measured the gene expression of estrogen receptors (ERs) and the angiotensin type 1 receptor (AT1R) in the areas of the brain that control fluid balance. ERβ, G protein estrogen receptor (GPER), and AT1R were reduced in the paraventricular nucleus of the hypothalamus in middle-aged and old rats, compared to young rats. These results suggest the estrogenic control of fluid intake is modified by age. Older animals lost the fluid intake effects of E2, which correlated with decreased ER and AT1R expression in the hypothalamus