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In this paper, we discuss the evolution of assignments in a data warehousing course to address the burgeoning interest and enrollment of students in data science programs. We focus on our experience incorporating the Teradata University Network (TUN) Data Challenge competition project as a class assignment. Students worked in small teams to answer questions posed by a non-profit organization, Hire...
Many organizations rely on relational database platforms for OLAP-style querying (aggregation and filtering) for small to medium size applications. We investigate the impact of scaling up the data sizes for such queries. We intend to illustrate what kind of performance results an organization could expect should they migrate current applications to big data environments. This paper benchmarks the...
Schema heterogeneity has been perceived as a major challenge towards data integration and exchange for more than two decades. The advent of big data and NoSQL data stores has further led to proliferation of data models thus exacerbating those challenges. It would be useful to have an approach that allows leveraging both schema-based and schemaless data stores. A graph model provides a solution towards...
Models for conceptual design of data warehouse schemas have been proposed, but few researchers have addressed schema evolution in a formal way and none have presented software tools for enforcing the correctness of multidimensional schema evolution operators. We generalize the core features typically found in data warehouse data models, along with modeling extended hierarchy semantics. The advanced...
This paper investigates an algorithm for semantic query optimization for object-oriented databases (OODBs). Semantic query optimization is accomplished by applying transformation rules that use semantic integrity constraints to modify queries to execute more efficiently. Data structures and a transformation algorithm are developed here for efficient constraint selection and processing. To verify that...
The "Girls on the Go: The Mobile Computing College Experience" is a residential summer camp whose aim is to encourage female high school students to attend college, to consider computer science as viable major, and to pursue computing related degrees. The camp content is designed primarily around a user-centered design process, with the students gaining experience in the development of a...
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