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This digital document is a journal article from Information Processing and Management, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

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The increasing number of documents to be indexed in many environments (Web, intranets, digital libraries) and the limitations of a single centralised index (lack of scalability, server overloading and failures), lead to the use of distributed information retrieval systems to efficiently search and locate the desired information. This work is a case study of different architectures for a distributed information retrieval system, in order to provide a guide to approximate the optimal architecture with a specific set of resources. We analyse the effectiveness of a distributed, replicated and clustered architecture simulating a variable number of workstations (from 1 up to 4096). A collection of approximately 94 million documents and 1 terabyte (TB) of text is used to test the performance of the different architectures. In a purely distributed information retrieval system, the brokers become the bottleneck due to the high number of local answer sets to be sorted. In a replicated system, the network is the bottleneck due to the high number of query servers and the continuous data interchange with the brokers. Finally, we demonstrate that a clustered system will outperform a replicated system if a high number of query servers is used, essentially due to the reduction of the network load. However a change in the distribution of the users' queries could reduce the performance of a clustered system. ... Read more

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Purchase includes free access to book updates online and a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: Neo-Byzantine architecture in the Russian Empire emerged in the 1850s and became an officially endorsed preferred architectural style for church construction during the reign of Alexander II of Russia (18551881), replacing the Russo-Byzantine style of Konstantin Thon. Although Alexander III changed state preferences in favor of late Russian Revival, neo-Byzantine architecture flourished during his reign (18811894) and continued to be used until the outbreak of World War I. Émigré architects who settled in the Balkans and in Harbin after the revolution of 1917 worked on Neo-Byzantine designs there until World War II. Initially, Byzantine architecture concentrated in Saint Petersburg and the Crimea, with two isolated projects launched in Kiev and Tbilisi. In the 1880s Byzantine designs became the preferred choice for Orthodox expansion on the frontiers of the Empire Congress Poland, Lithuania, Bessarabia, Central Asia, northern Caucasus, the Lower Volga and the Cossack Hosts; in the 1890s, they spread from the Urals region into Siberia along the emerging Trans-Siberian Railway. State-sponsored Byzantine churches were also built in Jerusalem, Harbin, Sofia and on the French Riviera. Non-religious construction in Byzantine style was uncommon; most extant examples were built as hospitals and almshouses during the reign of Nicholas II. Church of Dmitry Solunsky in Saint Petersburg (18611866) by Roman Kuzmin an earliest example of a styleThe last decade of Alexander I's rule was marked by state enforcement of the Empire style as the only architectural style for religious, public and private construction. This monopoly of a single style was lifted in the early 1830s; as Nicholas I promoted Konstantin Thon's eclectic church designs, architects (Mikh... More: http://booksllc.net/?id=19285097 ... Read more

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At his death, Felix Jacoby left to posterity a monumental work assembling the fragments of the work of more than 870 Greek historians. Yet the sheer bulk of the material make it difficult to use. These indexes aim to facilitate access to the corpus of fragments and to improve its usefulness. Index 1 places all sources of fragments in a list alphabetized by author and work, index 2 follows the order of presentation found in Jacoby, while index 3 places the authors of fragments in alphabetical order and gives under each one an alphabetized list of authors who cite him. ... Read more