Connecting the dots: a multi-pivot approach to data exploration

The purpose of data browsers is to help users identify and query data effectively without being overwhelmed by large complex graphs of data. A proposed solution to identify and query data in graph-based datasets is Pivoting (or set-oriented browsing), a many-to-many graph browsing technique that allows users to navigate the graph by starting from a set of instances followed by navigation through common links. Relying solely on navigation, however, makes it difficult for users to find paths or even see if the element of interest is in the graph when the points of interest may be many vertices apart. Further challenges include finding paths which require combinations of forward and backward links in order to make the necessary connections which further adds to the complexity of pivoting. In order to mitigate the effects of these problems and enhance the strengths of pivoting we present a multi-pivot approach which we embodied in tool called Visor. Visor allows users to explore from multiple points in the graph, helping users connect key points of interest in the graph on the conceptual level, visually occluding the remainder parts of the graph, thus helping create a road-map for navigation. We carried out an user study to demonstrate the viability of our approach

A Novel Application: Using Mobile Technology to Connect Physical and Virtual Reference Collections

This chapter describes an innovative implementation of the use of iPad kiosks to blur the lines between physical and virtual library collections. Providence College’s Phillips Memorial Library + Commons began lending iPads to students, faculty, and staff in 2012. In addition to lending the devices, library staff dedicated time to learning about both task-based and subject-based mobile applications that would be of use to our community. A small group of library staff tested, discussed, and vetted a variety of apps that would be deployed on the iPads to be lent out. Efforts were made to promote the use and discovery of various apps on the devices through thoughtful organization of the apps on the devices themselves, programming around applications, and the creation of an online research guide designed to teach more about the apps. Despite these initiatives, assessment data from the iPad lending program collected over the course of five semesters suggests that patrons borrowing the iPads are using them primarily for accessing the Internet (Safari, Chrome, etc.), social media (Facebook, Twitter, etc.), and consuming media (YouTube, Netflix, Pandora, Spotify, etc.). With this data in mind, library staff began to think of alternative ways to connect our patrons with useful, content-based, mobile applications. Drawing on research around the Internet of Things and the integration of digital technologies with our physical lives, the Digital Publishing Services Coordinator suggested positioning iPad kiosks strategically within the library’s physical book collection as a means to connect patrons browsing a given area of the stacks with the library’s online resources related to that subject area. The library’s Commons Technology Specialist had experience with iPad kiosks and programming the iPads as he had managed the logistics of the iPad lending program since its inception. Working collaboratively, these colleagues devised a way to image the iPads for public use and load them with subject-specific apps as well as links to library databases and open web resources. The team chose to use Scalar as the primary content management tool for kiosk content. This chapter provides details about the selection and deployment of content for the Theology Kiosk, signage and communications created to attract patrons to the kiosk, and initial data about kiosk use. The piece concludes with a review of the kiosk project and an outline of future planning related to the project (staff time, hardware and software requirements, usability testing, scaling the project, etc.)

A user evaluation of hierarchical phrase browsing

Phrase browsing interfaces based on hierarchies of phrases extracted automatically from document collections offer a useful compromise between automatic full-text searching and manually-created subject indexes. The literature contains descriptions of such systems that many find compelling and persuasive. However, evaluation studies have either been anecdotal, or focused on objective measures of the quality of automatically-extracted index terms, or restricted to questions of computational efficiency and feasibility. This paper reports on an empirical, controlled user study that compares hierarchical phrase browsing with full-text searching over a range of information seeking tasks. Users found the results located via phrase browsing to be relevant and useful but preferred keyword searching for certain types of queries. Users experiences were marred by interface details, including inconsistencies between the phrase browser and the surrounding digital library interface

Spotlight browsing of resource archives

Many organizations, particularly in the heritage sector, have large archives of digital content that they could make available to the general public or special interest groups if they had the appropriate mechanisms. Currently, these organizations can develop pre-crafted web sites, simple database-driven web sites or search facilities for accessing the content. However, none of these can be expected to appropriately present this content or scaffold its effective use. Our proposed solution is an approach to navigation that we term spotlight browsing. It has the following key features: (i) Users can select a collection of resources from the archive, shining a spotlight on this area of the archive; (ii) The collection is structured in a number of ways to support its exploration and convey interesting properties of the collection; (iii) Users can see what is on the periphery of their current collection in order to encourage further exploration; (iv) Users can redefine the collection in order to move their spotlight to another area of the archive; (v) Any item viewed while browsing can be bookmarked into a personal collection that can be built up using resources from many different spotlights. The approach has been implemented and tested using an archive of content from a heritage institution

Building Movie Map -- A Tool for Exploring Areas in a City -- and its Evaluation

We propose a new Movie Map system, with an interface for exploring cities. The system consists of four stages; acquisition, analysis, management, and interaction. In the acquisition stage, omnidirectional videos are taken along streets in target areas. Frames of the video are localized on the map, intersections are detected, and videos are segmented. Turning views at intersections are subsequently generated. By connecting the video segments following the specified movement in an area, we can view the streets better. The interface allows for easy exploration of a target area, and it can show virtual billboards of stores in the view. We conducted user studies to compare our system to the GSV in a scenario where users could freely move and explore to find a landmark. The experiment showed that our system had a better user experience than GSV

User Navigation in Large-Scale Distributed Digital Libraries: The Case of the Digital Public Library of America

This article presents the findings of a case study that examined user navigation in a large-scale digital library in the context of academic use. Using the Digital Public Library of America as case, the study explored user navigation and understanding of a distributed model of large-scale digital libraries. The DPLA model involves two- or three-step navigation pathways. Most study participants could navigate the DPLA distributed, multi-layered system effectively. This study found some confusion among the participants when they had to move through a three-step process to locate digital objects provided by a metadata aggregator service hub. The study participants also pointed out the advantages of a distributed model in collocating digital resources and connecting users to a wide range of digital libraries