David Culler

Portable Queries Using the Brick Schema for Building Applications

2016

Sensorized commercial buildings are a rich target for building a new class of applications that improve operational and energy efficiency of building operations that take into account human activities. Such applications, however, rarely experience widespread …

Design and analysis of a query processor for brick

2017

Brick is a recently proposed metadata schema and ontology for describing building components and the relationships between them. It represents buildings as directed labeled graphs using the RDF data model. Using the SPARQL query language, …

Membrane: A Cryptographic Access Control System for Data Lakes

2025 · arXiv (Cornell University)

Organizations use data lakes to store and analyze sensitive data. But hackers may compromise data lake storage to bypass access controls and access sensitive data. To address this, we propose Membrane, a system that (1) …