33 results for Hinze, Annika, Working or discussion paper

  • Text categorization and similarity analysis: implementation and evaluation

    Fowke, Michael; Hinze, Annika; Heese, Ralf (2013-12)

    Working or discussion paper
    University of Waikato

    This report covers the implementation of software that aims to identify document versions and se-mantically related documents. This is important due to the increasing amount of digital information. Key criteria were that the software was fast and required limited disk space. Previous research de-termined that the Simhash algorithm was the most appropriate for this application so this method was implemented. The structure of each component was well defined with the inputs and outputs constant and the result was a software system that can have interchangeable parts if required.

    View record details
  • Social interactions using an electronic rabbit

    Zaicu, Alexandru Calin; Hinze, Annika (2013-12)

    Working or discussion paper
    University of Waikato

    In this project we use an electronic rabbit called Karotz, created by French company Violet. The rabbits have the ability to connect autonomously to a WI-FI network. IN this project we use Karotz to record an audio log that will contain sounds of the environment. We also programmed a way for the rabbit to send audio to its other Karotz friend. We explored if Karotz can be used to help people stay in contact with each other and to feel less homesick.

    View record details
  • Text categorization and similarity analysis: similarity measure, architecture and design

    Fowke, Michael; Hinze, Annika; Heese, Ralf (2013-12)

    Working or discussion paper
    University of Waikato

    This research looks at the most appropriate similarity measure to use for a document classification problem. The goal is to find a method that is accurate in finding both semantically and version related documents. A necessary requirement is that the method is efficient in its speed and disk usage. Simhash is found to be the measure best suited to the application and it can be combined with other software to increase the accuracy. Pingar have provided an API that will extract the entities from a document and create a taxonomy displaying the relationships and this extra information can be used to accurately classify input documents. Two algorithms are designed incorporating the Pingar API and then finally an efficient comparison algorithm is introduced to cut down the comparisons required.

    View record details
  • Text categorization and similarity analysis: similarity measure, literature review

    Fowke, Michael; Hinze, Annika; Heese, Ralf (2013-12)

    Working or discussion paper
    University of Waikato

    Document classification and provenance has become an important area of computer science as the amount of digital information is growing significantly. Organisations are storing documents on computers rather than in paper form. Software is now required that will show the similarities between documents (i.e. document classification) and to point out duplicates and possibly the history of each document (i.e. provenance). Poor organisation is common and leads to situations like above. There exists a number of software solutions in this area designed to make document organisation as simple as possible. I'm doing my project with Pingar who are a company based in Auckland who aim to help organise the growing amount of unstructured digital data. This reports analyses the existing literature in this area with the aim to determine what already exists and how my project will be different from existing solutions.

    View record details
  • Catching and displaying memory cues for a mobile augmented memory system

    Bellamy, Jake; Hinze, Annika (2013-12)

    Working or discussion paper
    University of Waikato

    This report goes over and details the progress of the 2013 COMP477 project “Augmenting Memory: The Digital Parrot on Mobile Devices” undertaken by Jake Bellamy and supervised by Annika Hinze at the University of Waikato. The report begins with an overview on the problem with remembering events in people’s lives and details the background information on the Digital Parrot system. It also describes the previous project that preceded this one, which began to conceptualize the Digital Parrot on mobile devices. It analyses problems with the current design of the system and addresses them. The report then goes on to conduct an in depth user study with the functioning version of the software. The user study finds design flaws and incorrect functionality in the application that would not have otherwise been apparent. Finally, the report concludes with a proposed user interface concept that addresses all of the issues found in the user study and describes how the system would work. It describes the initial implementation that has begun in building this system.

    View record details
  • Browsing and book selection in the physical library shelves

    Cunningham, Sally Jo; Alqurashi, Hayat; Hinze, Annika; Vanderschantz, Nicholas; Timpany, Claire; Heese, Ralf (2013-02)

    Working or discussion paper
    University of Waikato

    Library users should be conveniently interact with collections and be able to easily choose books of interest as they explore and browse a physical book collection. While there exists a growing body of naturalistic studies of browsing and book selection in digital collections, the corresponding literature on behaviour in the physical stacks is surprisingly sparse. We add to this literature in this paper, by conducting observations of patrons in a university library as they selected books from the shelves. Our aim is to further our understanding of patterns of behaviour in browsing and selection in physical collections.

    View record details
  • Shared browsing and book selection in an academic library

    Timpany, Claire; Alqurashi, Hayat; Hinze, Annika; Cunningham, Sally Jo; Vanderschantz, Nicholas (2012)

    Working or discussion paper
    University of Waikato

    While there exist a small but growing body of naturalistic studies of collaborative searching and browsing in digital collections, the corresponding literature on behavior in the physical stacks is surprisingly sparse. Here, we add to this literature by conducting observations of the “retrieval journeys” of pairs of patrons in a university library. We specifically focus on interactions between patrons as they work together to browse and select books in physical collections, to further our understanding of collaborative information behaviour.

    View record details
  • History navigation in location-based mobile systems

    Müller, Knut; Hinze, Annika (2010-12-01)

    Working or discussion paper
    University of Waikato

    The aim of this paper is to provide an overview and comparison of concepts that have been proposed to guide users through interaction histories (e.g. for web browsers). The goal is to gain insights into history design that may be used for designing an interaction history for the location-based Tourist Information Provider (TIP) system [8]. The TIP system consists of several services that interact on a mobile device.

    View record details
  • Eliciting usage contexts of safety-critical medical devices

    Bowen, Judy; Cunningham, Sally Jo; Hinze, Annika; Jung, Doris; Reeves, Steve (2014)

    Working or discussion paper
    University of Waikato

    This position paper outlines our approach to improve the usage choice of suitable devices in different health care environments (contexts). Safety-critical medical devices are presumed to have undergone a thorough (user-centred) design process to optimize the device for the intended purpose, user group and environment. However, in real-life health care scenarios, actual usage may not reflect the original design parameters. We suggest the identification of further usage contexts for safety-critical medical devices through ethnographic and other studies, to assist better modelling of the challenges of different usage environments. In combination with system and interaction models, these context models can then be used for decision-support in choosing medical devices that are suitable for the intended environment.

    View record details
  • Towards a TIP 3.0 service-oriented architecture: Interaction design.

    Hinze, Annika; Malik, Petra; Malik, Robi (2005-01-01)

    Working or discussion paper
    University of Waikato

    This paper describes our experience when applying formal methods in the design of the tourist information system TIP, which presents context-sensitive information to mobile users with small screen devices. The dynamics of this system are very complex and pose several challenges, firstly because of the sophisticated interaction of several applications on a small screen device and the user, and secondly because of the need for communication with highly asynchronous event-based information systems. UML sequence diagrams have been used to capture the requirements and possible interactions of the system. In a second step, a formal model has been created using discrete event systems, in order to thoroughly understand and analyse the dynamics of the system. By verifying general properties of the formal model, several conceptual difficulties have been revealed in very early stages of the design process, considerably speeding up the development. This work shows the limitations of typical methods for interaction design when applied to mobile systems using small screen devices and proposes an alternative approach using discrete event systems.

    View record details
  • Subscription tree pruning: A structure-independent routing optimization for general-purpose publish/subscribe systems.

    Bittner, Sven; Hinze, Annika (2006-01-01)

    Working or discussion paper
    University of Waikato

    A main challenge in distributed publish/subscribe systems is the efficient and scalable routing of incoming information (event messages). For largescale publish/subscribe services, subscription forwarding has been established as a prevalent routing scheme. It reduces the network traffic for event routing due to selectively forwarding event messages to relevant parts of the network only. To further improve event routing, publish/subscribe systems apply routing optimizations. So far, optimizations for general-purpose publish/subscribe systems are still missing. In this paper, we present the architecture, realization, and evaluation of our prototype of a large-scale publish/subscribe service applying a novel routing optimization, subscription tree pruning. We also show a comparison of five existing routing optimizations in respect to six important characteristic parameters affecting the suitability of these approaches in practice (including space usage, time efficiency (throughput), and network load). This comparative analysis clearly demonstrates the advantages of subscription pruning over other routing optimizations. In our practical experiments, we then investigate the behavior of our prototype regarding all quantitatively measurable parameters from our previously theoretically analyzed ones. Our evaluation of subscription pruning in this paper is more extensive than previous analyses of any routing optimizations for publish/ subscribe systems, which focus on selected parameters only.

    View record details
  • Design and analysis of an efficient distributed event notification service

    Bittner, Sven; Hinze, Annika (2004-01-01)

    Working or discussion paper
    University of Waikato

    Event Notification Services (ENS) use the publish/subscribe paradigm to continuously inform subscribers about events they are interested in. Subscribers define their interest in so-called profiles. The event information is provided by event publishers, filtered by the service against the profiles, and then send to the subscribers. In real-time systems such as facility management, an efficiency filter component is one of the most important design goals. In this paper, we present our analysis and evaluation of efficient distributed filtering algorithms. Firstly, we propose a classification and first-cut analysis of distributed filtering algorithms. Secondly, based on the classification we describe our analysis of selected algorithms. Thirdly, we describe our ENS prototype DAS that includes three filtering algorithms. This prototype is tested with respect to efficiency, network traffic and memory consumption. In this paper, we discuss the results of our practical analysis in detail.

    View record details
  • Arbitrary boolean advertisements: the final step in supporting the boolean publish/subscribe model

    Bittner, Sven; Hinze, Annika (2006-06-01)

    Working or discussion paper
    University of Waikato

    Publish/subscribe systems allow for an efficient filtering of incoming information. This filtering is based on the specifications of subscriber interests, which are registered with the system as subscriptions. Publishers conversely specify advertisements, describing the messages they will send later on. What is missing so far is the support of arbitrary Boolean advertisements in publish/subscribe systems. Introducing the opportunity to specify these richer Boolean advertisements increases the accuracy of publishers to state their future messages compared to currently supported conjunctive advertisements. Thus, the amount of subscriptions forwarded in the network is reduced. Additionally, the system can more time efficiently decide whether a subscription needs to be forwarded and more space efficiently store and index advertisements. In this paper, we introduce a publish/subscribe system that supports arbitrary Boolean advertisements and, symmetrically, arbitrary Boolean subscriptions. We show the advantages of supporting arbitrary Boolean advertisements and present an algorithm to calculate the practically required overlapping relationship among subscriptions and advertisements. Additionally, we develop the first optimization approach for arbitrary Boolean advertisements, advertisement pruning. Advertisement pruning is tailored to optimize advertisements, which is a strong contrast to current optimizations for conjunctive advertisements. These recent proposals mainly apply subscription-based optimization ideas, which is leading to the same disadvantages. In the second part of this paper, our evaluation of practical experiments, we analyze the efficiency properties of our approach to determine the overlapping relationship. We also compare conjunctive solutions for the overlapping problem to our calculation algorithm to show its benefits. Finally, we present a detailed evaluation of the optimization potential of advertisement pruning. This includes the analysis of the effects of additionally optimizing subscriptions on the advertisement pruning optimization.

    View record details
  • Proceedings of the Third Computing Women Congress (CWC 2008): Student papers

    Hinze, Annika; Schweer, Andrea; Hempstalk, Kathryn (2008-02)

    Working or discussion paper
    University of Waikato

    The Third Computing Women Congress was held at the University of Waikato, Hamilton, New Zealand from February 11th to 13th, 2008. The Computing Women Congress (CWC) is a Summer University for women in Computer Science. It is a meeting-place for female students, academics and professionals who study or work in Information Technology. CWC provides a forum to learn about and share the latest ideas of computing related topics in a supportive environment. CWC provides an open, explorative learning and teaching environment. Experimentation with new styles of learning is encouraged, with an emphasis on hands-on experience and engaging participatory techniques.

    View record details
  • Design and implementation of a filter engine for semantic web documents

    Kozuka, Takanori; Hinze, Annika (2005-01-01)

    Working or discussion paper
    University of Waikato

    This report describes our project that addresses the challenge of changes in the semantic web. Some studies have already been done for the so-called adaptive semantic web, such as applying inferring rules. In this study, we apply the technology of Event Notification System (ENS). Treating changes as events, we developed a notification system for such events.

    View record details
  • A review of user interface adaption in current semantic web browsers

    Turner, Emmanuel; Hinze, Annika; Jones, Steve (2011-02-08)

    Working or discussion paper
    University of Waikato

    The semantic web is an example of an innumerable corpus because it contains innumerable subjects expressed using innumerable ontologies. This paper reviews current semantic web browsers to see if they can adaptively show meaningful data presentations to users. The paper also seeks to discover if current semantic web browsers provide a rich enough set of capabilities for future user interface work to be built upon.

    View record details
  • Event notification services: analysis and transformation of profile definition languages

    Jung, Doris; Hinze, Annika (2004-01-01)

    Working or discussion paper
    University of Waikato

    The integration of event information from diverse event notification sources is, as with meta-searching over heterogeneous search engines, a challenging task. Due to the complexity of profile definition languages, known solutions for heterogeneous searching cannot be applied for event notification. In this technical report, we propose transformation rules for profile rewriting. We transform each profile defined at a meta-service into a profile expressed in the language of each event notification source. Due to unavoidable asymmetry in the semantics of different languages, some superfluous information may be delivered to the meta-service. These notifications are then post-processed to reduce the number of spurious messages. We present a survey and classification of profile definition languages for event notification, which serves as basis for the transformation rules. The proposed rules are implemented in a prototype transformation module for a Meta-Service for event notification.

    View record details
  • A distributed directory service for Greenstone

    Buchanan, George; Hinze, Annika (2005-01-01)

    Working or discussion paper
    University of Waikato

    Greenstone is a software for creating and maintaining distributed digital library collections. It provides a sophisticated federation mechanism for the collections. In order to support alerting notification about changes in the distributed collections, we propose a distributed directory service for the management of the distributed Greenstone installations. The Greenstone directory service (GDS) acts on top of the distributed Greenstone structure for the management of collections. This paper describes both, the initial distributed Greenstone structure and the distributed directory service.

    View record details
  • Advanced recommendations in a mobile tourist information system

    Junmanee, Saijai; Hinze, Annika (2005-01-01)

    Working or discussion paper
    University of Waikato

    An advanced tourist information provider system delivers information regarding sights and events on their users' travel route. In order to give sophisticated personalized information about tourist attractions to their users, the system is required to consider base data which are user preferences defined in their user profiles, user context, sights context, user travel history as well as their feedback given to the sighs they have visited. In addition to sights information, recommendation on sights to the user could also be provided. This project concentrates on combinations of knowledge on recommendation systems and base information given by the users to build a recommendation component in the Tourist Information Provider or TIP system. To accomplish our goal, we not only examine several tourist information systems but also conduct the investigation on recommendation systems. We propose a number of approaches for advanced recommendation models in a tourist information system and select a subset of these for implementation to prove the concept.

    View record details
  • Open issues in semantic query optimization in relational DBMS

    Genet, Bryan Howard; Hinze, Annika (2004-01-01)

    Working or discussion paper
    University of Waikato

    After two decades of research into Semantic Query Optimization (SQO) there is clear agreement as to the efficacy of SQO. However, although there are some experimental implementations there are still no commercial implementations. We first present a thorough analysis of research into SQO. We identify three problems which inhibit the effective use of SQO in Relational Database Management Systems(RDBMS). We then propose solutions to these problems and describe first steps towards the implementation of an effective semantic query optimizer for relational databases.

    View record details