Bücher von John Van Dyke

Recognition of the importance of power and energy in the field of high performance computing (HPC) has never been greater. Research has been conducted in a number of areas related to power and energy, but little existing research has focused on large-scale HPC. Part of the reason is the lack of measurement capability currently available on small or large platforms. Typically, research is conducted using coarse methods of measurement such as inserting a power meter between the power source and the platform, or fine grained measurements using custom instrumented boards (with obvious limitations in scale). To analyze real scientific computing applications at large scale, an in situ measurement capability is necessary that scales to the size of the platform.In response to this challenge, the unique power measurement capabilities of the Cray XT architecture were exploited to gain an understanding of power and energy use and the effects of tuning both CPU and network bandwidth. Modifications were made at the operating system level to deterministically halt cores when idle. Additionally, capabilities were added to alter operating P-state. At the application level, an understanding of the power requirements of a range of important DOE/NNSA production scientific computing applications running at large scale (thousands of nodes) is gained by simultaneously collecting current and voltage measurements on the hosting nodes. The effects of both CPU and network bandwidth tuning are examined and energy savings opportunities of up to 39% with little or no impact on run-time performance is demonstrated. Capturing scale effects was key. This research provides strong evidence that next generation large-scale platforms should not only approach CPU frequency scaling differently, as we will demonstrate, but could also benefit from the capability to tune other platform components, such as the network, to achieve more energy efficient performance.

""Columns of Jachin and Boaz in Relation to the Bible"" is a book written by John Van Dyke that explores the significance of the two pillars that stood at the entrance of the Temple of Solomon in Jerusalem. The author delves into the historical and religious context of the pillars, examining their symbolism and meaning in the Bible and other ancient texts. He also discusses various interpretations and theories surrounding the pillars, including their possible connection to the Egyptian god Osiris and the Freemasonry tradition. This book offers a comprehensive analysis of the Columns of Jachin and Boaz and their relevance to the study of ancient religions and cultures.This is considered among the most important symbols in a Masonic Lodge. The author investigates the origin of these two names and gives the reader an in-depth analysis of the history and profound symbolism of the Words and Pillars themselves. Drawing on both Masonic and Hebraic sources, the author elucidates on the Fellow Craft's ""Middle Chamber lecture."" Initially prepared for the public, this work unfolds the arcana and is of especial significance and interest to the true Mason. Several passages are now deciphered for the first time, making this edition the most complete ever offered.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.