Anytime Hierarchical Clustering

We propose a new anytime hierarchical clustering method that iteratively transforms an arbitrary initial hierarchy on the configuration of measurements along a sequence of trees we prove for a fixed data set must terminate in a chain of nested partitions that satisfies a natural homogeneity requirement. Each recursive step re-edits the tree so as to improve a local measure of cluster homogeneity that is compatible with a number of commonly used (e.g., single, average, complete) linkage functions. As an alternative to the standard batch algorithms, we present numerical evidence to suggest that appropriate adaptations of this method can yield decentralized, scalable algorithms suitable for distributed/parallel computation of clustering hierarchies and online tracking of clustering trees applicable to large, dynamically changing databases and anomaly detection.Comment: 13 pages, 6 figures, 5 tables, in preparation for submission to a conferenc

Governance-technology co-evolution and misalignment in the electricity industry

This paper explores some reasons why the alignment between governance and technology in infrastructures may be unstable or not easy to achieve. Focusing on the electricity industry, we claim that the decentralization of governance – an essential step towards a decentralized technical coordination - may be hampered by if deregulation magnifies behavioural uncertainties and asset specificities; and that in a technically decentralized system, political demand for centralized coordination may arise if the players are able to collude and lobby, and if such practices lead to higher electricity rates and lower efficiency. Our claims are supported by insights coming from approaches as diverse as transaction cost economics, the competence-based view of the firm, and political economy.Governance; Technology; Coherence; Competence; Transaction costs; Regulation.

Barriers to Work Place Advancement: the Experience of the White Female Work Force

Glass Ceiling ReportGlassCeilingBackground17WhiteFemaleWorkForce.pdf: 8903 downloads, before Oct. 1, 2020

Talking about routines in the field: the emergence of organizational capabilities in a new cellular phone network company

No abstract availabl

vSPARQL: A View Definition Language for the Semantic Web

Translational medicine applications would like to leverage the biological and biomedical ontologies, vocabularies, and data sets available on the semantic web. We present a general solution for RDF information set reuse inspired by database views. Our view definition language, vSPARQL, allows applications to specify the exact content that they are interested in and how that content should be restructured or modified. Applications can access relevant content by querying against these view definitions. We evaluate the expressivity of our approach by defining views for practical use cases and comparing our view definition language to existing query languages

Glass Ceiling Commission - The Impact of the Glass Ceiling and Structural Change on Minorities and Women

Glass Ceiling ReportGlassCeilingBackground12StructuralChange.pdf: 9391 downloads, before Oct. 1, 2020