It is impossible to understand the cultures and achievements of the Greeks, Romans, Byzantines, and Arabs, without knowing something of their technology. Rome, for example, made advances in many areas which were subsequently lost and not regained for more than a millenium. This is a knowledgeable yet lucid account of the wonderful triumphs and the limitations of ancient and medieval engineering. This book systematically describes what is known about the evolution of irrigation works, dams, bridges, roads, building construction, water and wind power, automata, and clocks, with references to the social, geographical, and intellectual context.
Many modern computer systems, including homogeneous and heterogeneous architectures, support shared memory in hardware. In a shared memory system, each of the processor cores may read and write to a single shared address space. For a shared memory machine, the memory consistency model defines the architecturally visible behavior of its memory system. Consistency definitions provide rules about loads and stores (or memory reads and writes) and how they act upon memory. As part of supporting a memory consistency model, many machines also provide cache coherence protocols that ensure that multiple cached copies of data are kept up-to-date. The goal of this primer is to provide readers with a basic understanding of consistency and coherence. This understanding includes both the issues that must be solved as well as a variety of solutions. We present both high-level concepts as well as specific, concrete examples from real-world systems. This second edition reflects a decade of advancements since the first edition and includes, among other more modest changes, two new chapters: one on consistency and coherence for non-CPU accelerators (with a focus on GPUs) and one that points to formal work and tools on consistency and coherence.
Put the work of a Pulitzer prize-winning author in your students’ hands every day The American Vision boasts an exceptional author team with specialized expertise in colonial, Civil War, 20th-century, and Civil Rights history. The full panorama of American history comes alive through their vivid and accurate retelling, and the co-authorship of National Geographic ensures that the program's new maps, charts, and graphs are correct to the last detail.
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
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