Scalable data abstractions for distributed parallel computations

The ability to express a program as a hierarchical composition of parts is an essential tool in managing the complexity of software and a key abstraction this provides is to separate the representation of data from the computation. Many current parallel programming models use a shared memory model to provide data abstraction but this doesn't scale well with large numbers of cores due to non-determinism and access latency. This paper proposes a simple programming model that allows scalable parallel programs to be expressed with distributed representations of data and it provides the programmer with the flexibility to employ shared or distributed styles of data-parallelism where applicable. It is capable of an efficient implementation, and with the provision of a small set of primitive capabilities in the hardware, it can be compiled to operate directly on the hardware, in the same way stack-based allocation operates for subroutines in sequential machines

Losing Oceania to the Pacific and the World

Pacific history has been rediscovered of late by those seeking to incorporate the region into more transnational, global, and world histories. There is much good to be derived from regional and comparative approaches that link Pacific pasts to larger historical processes and to the boundary-defying movement of peoples, goods, and ideas. Pacific history needs very much to be in conversation with historians and theorists from elsewhere. There is also the issue of recovery. Drawing inspiration from the works of Greg Dening, Vince Diaz, and others, I address the persisting need for the recovery of deeper Oceanic pasts that bear on our shared if unequal present—an effort made even more necessary by the generalizations and omissions that come with a globalizing approach to Islands’ pasts. In this effort at recovery, I look to imagination, discursive flourish, indigenous knowledge, and Deep Time as integral methodologies that offer the possibility of transcending the conventions of historical research in the Pacific on a voyage that is ultimately about liberation

Lenition in the mozarabic dialects: A reappraisal

The main argument of this paper is not to show that the Mozarabic dialects were characterized either by voicing of Latin /-t-/ and /-k-/, or by the retention of a voiceless pronunciation, but to demonstrate that, because their phonological values in the various registers of Andalusian Arabic cannot be fixed, the use of ṭā’ and qāf cannot be adduced as proof for either possibility.El propósito de este estudio no es defender ni negar la sonorización de las /-t-/ y /-k-/ latinas en los dialectos mozárabes, sino proponer que, siendo difícil fijar el valor fonológico de las grafías ṭā’ y qāf en los varios registros del árabe andalusí, su uso no prueba la sonorización de dichas consonantes ni su conservación como sordas