673 research outputs found

    Diasporic Dreams, Middle Class Moralities and Migrant Domestic Workers among Muslim Filipinos in Saudi Arabia

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    This paper is about middle-class Muslim Filipinos in Saudi Arabia and their discourses about and relationships with migrant domestic workers. Saudi Arabia is not simply a temporary stopping point to a better future elsewhere, but is also a place where the middle-class aspirations of Muslim Filipinos may be realised and where their religious affiliations as Muslims may be seen as enhancing rather than detracting from those dreams and imaginings. As part of a large and diverse diasporic community, middle-class Filipinos routinely interact and socialise with working-class Filipinos. They often provide succour and support for their compatriots who labour under difficult and legally unprotected conditions. Some employ migrant domestic workers in their homes, many of whom are irregular or takas (escapees). At the same time, they reproduce and reinforce many of the gendered stereotypes of domestic workers that often suggest moral failings of one sort or another. The simultaneous embracing of and distancing from domestic workers reflects the anxieties of those, particularly women, whose tenuous hold of middle-class status is accomplished through, but also put at risk by, the precariousness of their sojourns abroad in the Kingdom

    Comprehensive evaluation of the linear stability of Alfvén eigenmodes driven by alpha particles in an ITER baseline scenario

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    The linear stability of Alfvén eigenmodes in the presence of fusion-born alpha particles is thoroughly assessed for two variants of an ITER baseline scenario, which differ significantly in their core and pedestal temperatures. A systematic approach based on CASTOR-K (Borba and Kerner 1999 J. Comput. Phys. 153 101; Nabais et al 2015 Plasma Sci. Technol. 17 89) is used that considers all possible eigenmodes for a given magnetic equilibrium and determines their growth rates due to alpha-particle drive and Landau damping on fuel ions, helium ashes and electrons. It is found that the fastest growing instabilities in the aforementioned ITER scenario are core-localized, low-shear toroidal Alfvén eigenmodes. The largest growth-rates occur in the scenario variant with higher core temperatures, which has the highest alpha-particle density and density gradient, for eigenmodes with toroidal mode numbers . Although these eigenmodes suffer significant radiative damping, which is also evaluated, their growth rates remain larger than those of the most unstable eigenmodes found in the variant of the ITER baseline scenario with lower core temperatures, which have and are not affected by radiative damping

    Sensitivity of alpha-particle-driven Alfvén eigenmodes to q-profile variation in ITER scenarios

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    A perturbative hybrid ideal-MHD/drift-kinetic approach to assess the stability of alpha-particle-driven Alfv�n eigenmodes in burning plasmas is used to show that certain foreseen ITER scenarios, namely the MA baseline scenario with very low and broad core magnetic shear, are sensitive to small changes in the background magnetic equilibrium. Slight variations (of the order of ) of the safety-factor value on axis are seen to cause large changes in the growth rate, toroidal mode number, and radial location of the most unstable eigenmodes found. The observed sensitivity is shown to proceed from the very low magnetic shear values attained throughout the plasma core, raising issues about reliable predictions of alpha-particle transport in burning plasmas
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