Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"Distributed databases"”.
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Query optimization in distributed databases
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1983.
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Dynamic Integration of Evolving Distributed Databases using Services
… of many separate existing heterogeneous and distributed databases which, due to organizational changes, must be merged and appear as one database. A solution to some database evolution problems is presented. It presents an Evolution Adaptive Service-Oriented Data Integration Architecture …
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Performance Analysis of Update Synchronization Algorithms for Distributed Databases
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1981.
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Temporally Correct Algorithms for Transaction Concurrency Control in Distributed Databases
… by using (within the applications and databases) real-time timestamps to identify and order events and transactions. The use of optimistic approaches to transaction concurrency control can be undesirable in such situations, as they allow incorrect results for database read operations. …
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Efficient Spatio-Temporal Network Analytics in Epidemiological Studies using Distributed Databases
… issues and challenges. In this study, we explore distributed databases to efficiently handle spatio-temporal Big Data for epidemiological studies. We propose DiceX (Data Intensive Computational Epidemiology using supercomputers), which couples high-performance, Big Data and relational computing by …
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A Model for the Design of Distributed Databases (Concurrency Control, Update Synchronization, File Allocation)
… been implemented in FORTRAN V. The allocation of databases and programs has been examined using this heuristic. Several decision rules have also been formulated based on the results of the heuristic. A second more comprehensive heuristic has been proposed based on the knapsack problem. The …
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The impact of network characteristics on the selection of a deadlock detection algorithm for distributed databases
… focused on the problem of deadlock detection in distributed databases, resulting in the publication of numerous algorithms to accomplish this function. The algorithms published to date differ greatly in many respects: timing, location, information collection, and basic approach. The emphasis of …
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Enhancing association rules algorithms for mining distributed databases. Integration of fast BitTable and multi-agent association rules mining in distributed medical databases for decision support.
… data located in heterogeneous and geographically distributed sites have been designated as one of the key important issues. Loading distributed data into centralized location for mining interesting rules is not a good approach. This is because it violates common issues such as data privacy and it …
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Group communication in bus-based computer networks
… Examples include multimedia teleconferencing, distributed databases, distributed operating system services, cooperating processes in automated control, and parallel processing. The communication among processes in group-based applications typically involves multiple destinations and is often …
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Separating conflict-recovery from failure-recovery in distributed consensus
Distributed databases provide fault tolerance while allowing multiple clients to concurrently submit requests and have those requests executed as if they are performed using a single thread on a single machine. This makes them vital components for a variety of distributed systems, from banking …
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Quality of Service and Optimization in Data Integration Systems
… of a global data integrations system. Similar to distributed databases this system allows declarative queries in order to express user-specific information needs. Scalability towards global data integration systems and openness were major design goals for the architecture and techniques developed …
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CRYPTOGRAPHY FROM CONSENSUS TO THE COSMOS
… more secure, and more efficient. As a pillar of distributed systems, consensus algorithms power everything from distributed databases to decentralized infrastructure. The protocols covered in this thesis (Streamlet (Chan and Shi, 2020), Simplex (Chan and Pass, 2023), and variants) are the …
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Web based CINDI system
… called a Semantic Header, which is stored in a distributed databases management system; it is distributed for reliability and availability. The Semantic-Header is replicated at different nodes of the Internet. The locations of such nodes are stored in a database catalog. A prototype has been …
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Blockchain technology in supply chain and logistics
… is a peer-to-peer infrastructure based on distributed databases and smart contracts as the business logic. The distributed ledger technology eliminates the need for intermediaries disrupting the ownership model. It can have a tremendous impact on cross-organizational process automation when …
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Supporting Local Autonomy in a Distributed Object-Oriented Database
Local autonomy of the individual databases in a distributed system is important as administrators of the individual databases often need to have complete control over how their data are structured, used and managed. Classical distributed databases support distribution transparency, replication …
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Development of new data partitioning and allocation algorithms for query optimization of distributed data warehouse systems
Distributed databases and in particular distributed data warehousing are becoming an increasingly important technology for information integration and data analysis. Data Warehouse (DW) systems are used by decision makers for performance measurement and decision support. However, although data …
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Modeling and Computation of Complex Interventions in Large-scale Epidemiological Simulations using SQL and Distributed Database
… complex interventions over large datasets. Our distributed database solution retains the simplicity of Indemics by using the same SQL query interface for expressing interventions. We show that our solution implements the most complex interventions by intelligently offloading them to the …
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On indexing large databases for advanced data models
… types and object models, constraint and temporal databases, and on-line analytical processing. We study the indexing requirements of these data models. In many cases, these requirements are fulfilled by efficient techniques for multidimensional range search. Previous techniques for …
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