This paper introduces Playa, a high-level user interface layer for composing algorithms for complex multiphysics problems out of objects from other Trilinos packages. Among other features, Playa provides very high-performance overloaded operators implemented through an expression template mechanism. In this paper, we give an overview of the central Playa objects from a user's perspective, show application to a sequence of increasingly complex solver algorithms, provide timing results for Playa's overloaded operators and other functions, and briefly survey some of the implementation issues involved.
Inscribed on the wall of the expiatory Basilica of Sacré Coeur, at
Montmartre, the 1873 ‘national vow’ of France interprets the
nation's recent misfortunes as divine chastisement of an errant and
irreligious people. Since it was Napoleon III's withdrawal of French troops
from Rome that had made it possible for the Italian forces to capture the
papal city in September 1870, the ‘national vow’ reflects a strong sense
of French responsibility for the pope's loss of his temporal power. The
Catholic Right interpreted France's defeat in the Franco-Prussian war,
and her subsequent loss of Alsace and Lorraine, as God's punishment on
‘the eldest daughter of the Church’ for her desertion of the Vicar of
Christ, and the ‘national vow’ pledged prayer for the Roman pontiff's
deliverance from his enemies. This study analyses the devotion of French
Catholics to ‘the prisoner of the Vatican’ during the Third Republic
through an exploration of some of the religious and political meanings of
pilgrimage to visit ‘Peter in chains’. It also charts the process by which
promotion in the Catholic press, rapid train transportation and cheaper
package fares opened an era of mass pilgrimage to Rome and paved the
way for a new popular papal style.
Describes a system for using the World Wide Web to distribute computational tasks to multiple hosts on the Web. A programmer with a computation to distribute registers it with a Web server. An idle host uses this server to identify available computations and downloads a Java class to perform the computation -we call this class a distriblet. The paper describes the programs written to carry out the load distribution, the structure of a distriblet class, and our experience in using this system.
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