Annual report

Empresa coneguda per l'acrònim: IB

Optimizing the Performance of Streaming Numerical Kernels on the IBM Blue Gene/P PowerPC 450 Processor

Several emerging petascale architectures use energy-efficient processors with vectorized computational units and in-order thread processing. On these architectures the sustained performance of streaming numerical kernels, ubiquitous in the solution of partial differential equations, represents a challenge despite the regularity of memory access. Sophisticated optimization techniques are required to fully utilize the Central Processing Unit (CPU). We propose a new method for constructing streaming numerical kernels using a high-level assembly synthesis and optimization framework. We describe an implementation of this method in Python targeting the IBM Blue Gene/P supercomputer's PowerPC 450 core. This paper details the high-level design, construction, simulation, verification, and analysis of these kernels utilizing a subset of the CPU's instruction set. We demonstrate the effectiveness of our approach by implementing several three-dimensional stencil kernels over a variety of cached memory scenarios and analyzing the mechanically scheduled variants, including a 27-point stencil achieving a 1.7x speedup over the best previously published results

The nursing work environment and quality of care: A cross-sectional study using the Essentials of Magnetism II Scale in England

Aims and objectives. To explore the structure of the Essentials of Magnetism II (EOMII) scale using data from nurses working in England; and to describe the impact of different aspects of the nursing work environment on nurse assessed care quality (NACQ). Background. The EOMII Scale was developed in the United States to measure nursing work environments. It has been widely used in the United States and in a number of other countries, but has not yet been used in the United Kingdom. Design. Cross-sectional study. Methods. Registered nurses (n=247) providing direct patient care in two National Health Service hospitals in England completed the EOMII scale and a single-item measuring NACQ. Principal Components Analysis was used to assess the structure of the scale. Correlation and regression analyses were used to describe the relationships between factors and NACQ. Results. A solution with explanatory variance of 45.25% was identified. Forty items loaded on five factors, with satisfactory consistency: i) ward manager support; ii) working as a team; iii) concern for patients; iv) organisational autonomy; and v) constraints on nursing practice. While in univariate analyses each of the factors was significantly associated with NACQ, in multivariate analyses, the relationship between organisational autonomy and NACQ no longer reached significance. However, a multiple mediation model indicated that the effect of organisational autonomy on NACQ was mediated by nurse manager support, working as a team, and concern for patients but not constraints on nursing practice. Conclusions. Subscales of the EOMII identified in an English sample of nurses measured important aspects of the nursing work environment, each of which is related to NACQ. Relevance to clinical practice. The EOMII could be a very useful tool for measuring aspects of the nursing work environment in the English Trusts particularly in relation to the quality of care

Contemporary art of Canada and Newfoundland. Collection of the International Business Machines Corporation, shown by International Business Machines Co., Limited, at the Canadian National Exhibition, Toronto, Ontario, August 23 to September 7, 1940.

This catalogue is from an art exhibition featuring Canadian and Newfoundland paintings from the art collection of the International Business Machines Corporation, a company whose president recognized the "importance of the cooperation between business and art, and desired to make some contribution toward increasing the interest of artists in business, and businessman in art." (p. [1]). The catalogue also contains a short biography of each artist, and a brief history of art and artists from each of the nine provinces and the Dominion of Newfoundland

Disco duro de ordenador

La fecha de producción se ha tomado de fuentes directas existentes en el Archivo del Observatorio de San Fernando.Transcripción: "B1480/359670. Seagate Technology Model ST-403

IBM Deferred Vacation Record

Small card is Kenith L. Ballard's copy of his Deferred Vacation Record spanning 1969-1971 noting vacation days earned and deferred as well as days to be taken in 1971

Numerical code for States, counties, and cities of the United States.

Mode of access: Internet

General rules for creating machinable records for libraries and special reference files.

Mode of access: Internet

Principles of operation : type 701 and associated equipment : IBM electronic data processing machines.

"This edition, Form 24-6042-1, is a minor revision of the preceding edition but does not obsolte form 22-6042-0."Mode of access: Internet