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Provenance-based trustworthiness assessment in sensor networks
TLDR
Experimental results show that the proposed systematic method for assessing the trustworthiness of data items provides a practical solution for trustworthiness assessment in sensor networks. Expand
Duality-based subsequence matching in time-series databases
TLDR
The authors propose a subsequence matching method, Dual Match, which exploits duality in constructing windows and significantly improves performance in large database applications and formally proves that the dual approach is correct. Expand
General match: a subsequence matching method in time-series databases based on generalized windows
TLDR
General Match offers advantages of both methods: it can reduce window size effect by using large windows like FRM and, at the same time, can exploit point-filtering effect like Dual Match. Expand
Ranked Subsequence Matching in Time-Series Databases
TLDR
Novel methods for ranked subsequence matching under time warping are presented, which finds top-k subsequences most similar to a query sequence from data sequences, which is the first and most sophisticated subsequences matching solution mentioned in the literature. Expand
Moving metadata from ad hoc files to database tables for robust, highly available, and scalable HDFS
TLDR
The proposed A-HDFS significantly enhances the HDFS metadata management scheme and, as a result, ensures that the entire system improves its stability, availability, and scalability. Expand
An MBR-Safe Transform for High-Dimensional MBRs in Similar Sequence Matching
TLDR
This paper formally defines a new transform, called mbrDFT, by extending definition of DFT, and formally proves that this new transform is MBR-safe, and shows that the approach significantly reduces the number of lower-dimensional transformations in similar sequence matching. Expand
SAMSTARplus: An Automatic Tool for Generating Multi- Dimensional Schemas from an Entity-Relationship Diagram
TLDR
A tool that automatically generates multidimensional schemas for data warehouses from OLTP entity-relationship diagrams (ERDs), SAMSTARplus can help users reduce efforts for designing data warehouses and aids decision making. Expand
Advanced resource management with access control for multitenant Hadoop
TLDR
This paper first analyzes the Hadoop framework focusing on "yet another resource negotiator (YARN)", which is responsible for managing resources, application runtime, and access control in the latest version of Hadoops, and defines the problems for supporting multitenancy and formally derive the requirements to solve these problems. Expand
Dynamic buffer allocation in video-on-demand systems
TLDR
This paper proposes a dynamic buffer allocation scheme that allocates to user requests buffers of the minimum size in a partially loaded state as well as in the fully loaded state and provides a solution to this equation, which can be computed at the system initialization time for runtime efficiency. Expand
SAMSTAR: An Automatic Tool for Generating Star Schemas from an Entity-Relationship Diagram
TLDR
A prototype system, SAMSTAR, is presented, which automatically generates star schemas from an ERD, which takes an ERd drawn by ERwin Data Modeler as an input and generates star Schema. Expand
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