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 50 for “"timestamp"”.
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Timestamp ordering and nested transactions
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1987.
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Synchronization in timestamp-based cache coherence protocols
… The Tardis cache coherence protocol uses timestamps to avoid these scalability problems. We build a cycle-level multicore simulator that implements a version of the Tardis protocol that uses release consistency. Changing the coherence protocol, which affects what memory values a processor …
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Performance of Concurrency Control Methods in Distributed Database Management Systems (Timestamp Ordering, Two-Phase Locking, Optimistic Scheme, Restart, Transaction Blocking)
… of concurrency control mechanisms, namely Basic Timestamp Ordering (BTO), Basic Optimistic scheme (BOPT), Basic Two-Phase Locking (B2PL), and Conservative Timestamp Ordering (CoTO), were developed, and the performances of those CCMs in distributed database management system (DDBMS) were simulated …
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An analysis of the bitcoin blockchain cryptography
… of Bitcoin mining. Analyses show that the timestamp could potentially be manipulated for an easier mining process due to the Bitcoin network's lax timestamp range. In addition, invariant cycles can be found in the logical functions used in SHA-256 which could potentially allow a backdoor …
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Monitoring uncertain data for sensor-based real-time systems
… queries over data streams for which the data or timestamp values are inherently uncertain. First, we propose a generic framework, namely Ptmon, for monitoring timing constraints and detecting their violation early, based on the notion of probabilistic violation time. In doing so, we provide a …
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Prediction of peak energy demand and timestamping in commercial supermarkets using deep learning
… demand in commercial buildings lack focus on the timestamps for the incident of peak consumption. For this reason, this research proposes to label three indexes per day and use the novel Energy Peaks and Timestamping Prediction (EPTP) framework to detect the energy peaks as well as the timestamps …
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Temporally Correct Algorithms for Transaction Concurrency Control in Distributed Databases
… 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. Although the …
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Higher Compression from the Burrows-Wheeler Transform with New Algorithms for the List Update Problem
… From Front and part of the randomized algorithm Timestamp. The Best x of 2x - 1 family includes Move-To-Front, the part of Timestamp of interest, and Frequency Count. Lastly, a greedy choosing scheme, Snake, switches back and forth as the amount of compression that two List Update algorithms …
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Use of location data for the surveillance, analysis, and optimization of clinical processes
… physical location, such as barcodes and manual timestamp entry, and may be better suited to indicate progress through clinical workflows. INCOMING!, a web-based platform that monitors and tracks patient progress from the operating room to the post-anesthesia care unit (PACU), is one such system …
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Time Series Anomaly Detection using Prediction-Reconstruction Mixture Errors
… unsupervised methods either use single-timestamp prediction or reconstruct entire time series. However, these methods are not mutually exclusive and can each offer complementary perspectives. This work first explores the successes and limitations of prediction-based and …
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Soccer Last Touch and Automatic Event Detection with Skeletal Tracking Data
… the last player to touch the ball at any timestamp during a match, and build a decision tree algorithm for classifying duel-like events and goalkeeping outcomes with the additional context of player joint location.
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Microsecond Time Synchronization for Computing Fiber Networks
… precise, CPU-independent hardware events to timestamp audio samples. We demonstrate that timestamped I2S data stored in external SPI flash can be correlated across devices to extract TDoA measurements for localizing sound sources. Cross-correlation techniques allow us to estimate direction …
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Low-overhead distributed transaction coordination
… due to write conflicts. Granola uses a novel timestamp-based coordination mechanism to serialize distributed transactions, offering lower latency and higher throughput than previous systems that offer strong consistency. Our experiments show that Granola has low overhead, is scalable and has …
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Summarizing multiprocessor program execution with versatile, microarchitecture-independent snapshots
… memory system and branch predictors. The Memory Timestamp Record (MTR) summarizes the directory and cache state of a multiprocessor system in a compact data structure. A single MTR snapshot is versatile enough to reconstruct the microarchitectural state resulting from various coherence protocols …
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Investigating correlations in time delay interferometry combinations of LISA data
… of the combination data streams at any given timestamp. This ensures that the optimal combinations are independent with respect to each other at this particular timestamp, but this result does not apply when the optimal combinations are compared at different timestamps. As the time shifting of …
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Locality-aware cache hierarchy management for multicore processors
… with high spatio-temporal locality. Third, a Timestamp-based memory ordering validation scheme is proposed that enables the locality-aware private cache replication scheme to be implementable in processors with out-of-order memory that employ popular memory consistency models. This method does …
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ResearchBuddy AI: LLM-Powered Assistant
… and developing YouTube video summarization with timestamp capabilities. ResearchBuddy AI is designed to provide researchers with intelligent tools for more efficient information management, with early development indicating strong potential to address research information overload.
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Enabling malware remediation in expanding home networks
… this connection log using a fuzzy check of the timestamp and source port, both provided by the ISP, iterated across a log of identified devices. EDICT will then provide the customer with user-friendly information on the infection's source, enabling remediation.As the Internet of Things (IoT) …
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Neural Time Alignment for End-to-End Automatic Speech Recognition Systems
… overall (no longer than 10 s), with an absolute timestamp error about 50 ms to 60 ms. In general, discriminative modelling is used in E2E ASR systems and generative modelling is used for conventional HMM-based ASR. The HMM emission probabilities are used to generate the acoustic probability for …
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Nexion: Enabling Concurrency on Architectures for Ordered Parallelism
… applications into short tasks that can be given timestamps to specify order constraints. Groups of tasks can be marked as concurrent and will execute independently if no data is shared among them. If data is shared, Nexion ensures that tasks remain atomic and respect applicable timestamp orders. …
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