Blacklight: Leveraging Next Generation Discovery

Blacklight is an open source, next generation discovery application. Originally developed to serve as an overarching "discovery layer" for libraries, its design and engineering give it the necessary feature set and flexibility to also serve as a repository interface, capable of fronting content of any kind, local or remote. With a rich set of search, browse and view functions, Blacklight's look, features and behaviors can be readily configured to meet local needs "out of the box". As an application with a modular architecture, it provides a framework capable of supporting additional libraries and widgets that extend Blacklight's capabilities beyond resource discovery. And as a vibrant open source project integrating enhancements and development from more than a dozen institutions, Blacklight is becoming a proven platform for content discovery and access, agnostic of underlying systems or repositories. This presentation will demonstrate the broad-based utility of Blacklight, including its key features, its use in different contexts, and how it integrates with different repositories to provide a rich and ready-made discovery application

Blacklight: Leveraging Next Generation Discovery

Blacklight is an open source, next generation discovery application. Originally developed to serve as an overarching "discovery layer" for libraries, its design and engineering give it the necessary feature set and flexibility to also serve as a repository interface, capable of fronting content of any kind, local or remote. With a rich set of search, browse and view functions, Blacklight's look, features and behaviors can be readily configured to meet local needs "out of the box". As an application with a modular architecture, it provides a framework capable of supporting additional libraries and widgets that extend Blacklight's capabilities beyond resource discovery. And as a vibrant open source project integrating enhancements and development from more than a dozen institutions, Blacklight is becoming a proven platform for content discovery and access, agnostic of underlying systems or repositories. This presentation will demonstrate the broad-based utility of Blacklight, including its key features, its use in different contexts, and how it integrates with different repositories to provide a rich and ready-made discovery application

Building the Hydra together: Enhancing repository provision through multiinstitution collaboration

In 2008 the University of Hull, Stanford University and University of Virginia agreed to collaborate with Fedora Commons (now DuraSpace) on the Hydra project. This project has sought to define and develop repository-enabled solutions for the management of multiple digital content management needs that are multi-purpose and multi-functional in such a way as to allow their use across multiple institutions. This article describes the evolution of Hydra as a project, but most importantly as a community that can sustain the outcomes from Hydra and develop them further. The data modelling and technical implementation are touched on in this context, and examples of the Hydra heads in development or production are highlighted. Finally, the benefits of working together, and having worked together, are explored as a key element in establishing a sustainable open source solution

The Future is Here! Embracing a New Era of Open Platforms

The Future is Here! Embracing a New Era of Open Platform

Complex THz and DC inverse spin Hall effect in YIG/Cu1−x_{1-x}Irx_{x} bilayers across a wide concentration range

We measure the inverse spin Hall effect of Cu$_{1-x}$Ir$_{x}$ thin films on yttrium iron garnet over a wide range of Ir concentrations ($0.05 \leqslant x \leqslant 0.7$). Spin currents are triggered through the spin Seebeck effect, either by a DC temperature gradient or by ultrafast optical heating of the metal layer. The spin Hall current is detected by, respectively, electrical contacts or measurement of the emitted THz radiation. With both approaches, we reveal the same Ir concentration dependence that follows a novel complex, non-monotonous behavior as compared to previous studies. For small Ir concentrations a signal minimum is observed, while a pronounced maximum appears near the equiatomic composition. We identify this behavior as originating from the interplay of different spin Hall mechanisms as well as a concentration-dependent variation of the integrated spin current density in Cu$_{1-x}$Ir$_{x}$. The coinciding results obtained for DC and ultrafast stimuli show that the studied material allows for efficient spin-to-charge conversion even on ultrafast timescales, thus enabling a transfer of established spintronic measurement schemes into the terahertz regime.Comment: 12 pages, 4 figure

Project Hydra: Designing & Building a Reusable Framework for Multipurpose, Multifunction, Multi-institutional Repository-Powered Solutions

4th International Conference on Open RepositoriesThis presentation was part of the session : Fedora User Group PresentationsDate: 2009-05-20 03:30 PM – 05:00 PMThere is a clear business need in higher education for a flexible, reusable application framework that can support the rapid development of multiple systems tailored to distinct needs, but powered by a common underlying repository. Recognizing this common need, Stanford University, the University of Hull and the University of Virginia are collaborating on "Project Hydra", a three-year effort to create an application and middleware framework that, in combination with an underlying Fedora repository, will create a reusable environment for running multifunction, multipurpose repository-powered solutions. This paper details the collaborators' functional and technical design for such a framework, and will demonstrate the progress made to date on the initiative.JIS

Sisyphean Task or the Holy Grail? Satisfying Demands of Higher Education through Community-Driven Open Source Projects

What elements are essential to successful community-driven open source projects? How much governance and overhead is required to develop and sustain an open source project? What are the factors that enhance or limit the pace of development, the growth in the development community, community adoption and longevity? Many open source projects don't start out worrying about sustainability or longevity, but successful projects often require considerable effort to succeed over time. This presentation and panel discussion will explore the use of community-driven open source projects to achieve the needs in higher education and review some of the many factors that may influence viability for community-driven open source projects. Specific projects will be discussed, along with a description of incubation strategies, governance approaches, growth challenges, ongoing support models, sustaining vibrant developer communities and lessons learned

Direct imaging of glycans in Arabidopsis roots via click labeling of metabolically incorporated azido-monosaccharides

Background: Carbohydrates, also called glycans, play a crucial but not fully understood role in plant health and development. The non-template driven formation of glycans makes it impossible to image them in vivo with genetically encoded fluorescent tags and related molecular biology approaches. A solution to this problem is the use of tailor-made glycan analogs that are metabolically incorporated by the plant into its glycans. These metabolically incorporated probes can be visualized, but techniques documented so far use toxic copper-catalyzed labeling. To further expand our knowledge of plant glycobiology by direct imaging of its glycans via this method, there is need for novel click-compatible glycan analogs for plants that can be bioorthogonally labelled via copper-free techniques. Results: Arabidopsis seedlings were incubated with azido-containing monosaccharide analogs of N-acetylglucosamine, N-acetylgalactosamine, l-fucose, and l-arabinofuranose. These azido-monosaccharides were metabolically incorporated in plant cell wall glycans of Arabidopsis seedlings. Control experiments indicated active metabolic incorporation of the azido-monosaccharide analogs into glycans rather than through non-specific absorption of the glycan analogs onto the plant cell wall. Successful copper-free labeling reactions were performed, namely an inverse-electron demand Diels-Alder cycloaddition reaction using an incorporated N-acetylglucosamine analog, and a strain-promoted azide-alkyne click reaction. All evaluated azido-monosaccharide analogs were observed to be non-toxic at the used concentrations under normal growth conditions. Conclusions: Our results for the metabolic incorporation and fluorescent labeling of these azido-monosaccharide analogs expand the possibilities for studying plant glycans by direct imaging. Overall we successfully evaluated five azido-monosaccharide analogs for their ability to be metabolically incorporated in Arabidopsis roots and their imaging after fluorescent labeling. This expands the molecular toolbox for direct glycan imaging in plants, from three to eight glycan analogs, which enables more extensive future studies of spatiotemporal glycan dynamics in a wide variety of plant tissues and species. We also show, for the first time in metabolic labeling and imaging of plant glycans, the potential of two copper-free click chemistry methods that are bio-orthogonal and lead to more uniform labeling. These improved labeling methods can be generalized and extended to already existing and future click chemistry-enabled monosaccharide analogs in Arabidopsis

“What? So What”: The Next-Generation JHOVE2 Architecture for Format-Aware Characterization

The JHOVE characterization framework is widely used by international digital library programs and preservation repositories. However, its extensive use over the past four years has revealed a number of limitations imposed by idiosyncrasies of design and implementation. With funding from the Library of Congress under its National Digital Information Infrastructure Preservation Program (NDIIPP), the California Digital Library, Portico, and Stanford University are collaborating on a two-year project to develop and deploy a next-generation architecture providing enhanced performance, streamlined APIs, and significant new features. The JHOVE2 Project generalizes the concept of format characterization to include identification, validation, feature extraction, and policy-based assessment. The target of this characterization is not a simple digital file, but a (potentially) complex digital object that may be instantiated in multiple files

Hydra: A Technical and Community Framework For Customized, Reusable, Repository Solutions

While repositories provide obvious benefits in hosting and managing content, it is equally clear that there is no "one size fits all" solution to the range of digital asset management needs at a typical institution, much less across institutions. A system that supports the submission, approval and dissemination of electronic theses and dissertations, for example, has demonstrably different requirements than a digitization workflow solution, an e-science data repository, or media preservation and access system. There is a clear need in the repository community to readily develop and deploy content-, domain-, and institution-specific solutions that integrate the flexibility and richness of customized applications and workflows with the underlying power of repositories for content management, access and preservation. Hydra is a multi-institutional, multi-functional, multi-purpose framework that addresses this need on twin fronts. As a technical framework, it provides a toolkit of reusable components that can be combined and configured in different arrays to meet a diversity of content management needs. As a community framework, Hydra provides like-minded institutions with the mechanism to combine their individual development efforts, resources and priorities into a collective solution with breadth and depth that exceeds the capacity of any single institution to create, maintain or enhance on its own