112 results for Hinze, Annika, ResearchCommons@Waikato

  • 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.

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  • 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.

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  • 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.

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  • 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.

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  • 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.

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  • Keeping Track of the semantic Web: Personalized Event Notification

    Hinze, Annika; Evans, Reuben James Emmanuel (2006)

    Conference item
    University of Waikato

    The semantic web will not be a static collection of formats, data and meta-data but highly dynamic in each aspect. This paper proposes a personalized event notification system for semantic web documents (ENS-SW). The system can intelligently detect and filter changes in semantic web documents by exploiting the semantic structure of those documents. In our prototype, we combine the functionalities of user profiles and distributed authoring systems. Typically, both approaches would lack the ability to handle semantic web documents. This paper introduces the design and implementation of our event notification system for semantic web documents that handles the XML representation of RDF. We analyzed our prototype regarding accuracy and efficiency in change detection. Our system supports sophisticated change detection including partial deletion, awareness for document restructuring, and approximate filter matches.

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  • Efficient filtering of composite events

    Hinze, Annika (2003)

    Conference item
    University of Waikato

    Event Notification Services (ENS) are used in various applications such as remote monitoring and control, stock tickers, traffic control, or facility management. The performance issues of the filtering of primitive events has been widely studied. However, for a growing number of applications, the rapid notification about the occurrence of composite events is an important issue. Currently, the detection of composite events requires a second filtering step after the identification of the primitive components. In this paper, we propose a single-step method for the filtering of composite events. The method has been implemented and tested within our ENS prototype CompAS. Using our method, the filter response time for composite events is significantly reduced. Additionally, the overall performance of the event filtering has been improved.

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  • Alerting in a Digital Library environment - Do Channels meet the requirements?

    Faensen, Daniel; Hinze, Annika; Schweppe, Heinz (1998)

    Conference item
    University of Waikato

    An Alerting Service (AS) informs its clients about new information provided by several suppliers. Special interests of clients can be defined as profiles. In the context of digital libraries, suppliers are the providers of documents. Providers are typically scientific publishers. In this paper we assume, that the providers are known to the clients. A general model and architecture of an Alerting Service is given in [1]. Channel technology has been developed for broadcast of news and continous streams of data like stock rates. For the digital library enviroment a finer granularity in profile definition than for common broadcasting is needed. In contrast to broadcast services, publishing events of multiple providers have to be presented to each client in a uniform way. In this summary we evaluate how the two competing approaches of Channel technology, Netscape’s Netcaster [3] and Microsofts Active Channels [2] meet these requirements. To satisfy user’s needs events have to be filtered by more or less complex profiles, e. g. a set of documents (like journals), a list of keywords (selected arbitraryly or from a thesaurus) or a query in a full-fledged query language like STARTS [4]. An easy-to-use and powerful profile definition language is one requirement for an AS. The second is a unified view, that means splitting the n:m-relationship between providers and clients. The use of both technologies strongly depends on how the contents is to be filtered, i.e. how the user profile is to be defined.

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  • 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.

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  • 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.

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  • Using ontologies to reason about the usability of interactive medical devices in multiple situations of use

    Bowen, Judy; Hinze, Annika (2012)

    Conference item
    University of Waikato

    Formally modelling interactive software systems and devices allows us to prove properties of correctness about such devices, and thus ensure effectiveness of their use. It also enables us to consider interaction properties such as usability and consistency between the interface and system functionality. Interactive modal devices, that have a fixed interface but whose behaviour is dependent on the mode of the device, can be similarly modelled. Such devices always behave in the same way (i.e. have the same functionality and interaction possibilities) irrespective of how, or where, they are used. However, a user’s interaction with such devices may vary according to the physical location or environment in which they are situated (we refer to this as a system’s context and usage situation). In this paper we look at a particular example of a safety-critical system, that of a modal interactive medical syringe pump, which is used in multiple situations. We consider how ontologies can be used to reason about the effects of different situations on the use of such devices.

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  • Using physical clocks for replication in MANETs

    Scholz, Manuel; Bregulla, Frank; Hinze, Annika (2007)

    Conference item
    University of Waikato

    When update-anywhere data replication is performed in a MANET, operations on replicated data are often executed concurrently. To achieve a global total ordering of all operations, we propose a hybrid timestamp mechanism that combines physical clocks and logical timestamps. Our approach overcomes the ordering problem that arises from imprecisely synchronized physical clocks. We overlay the timestamps of operations with a grid of time-slots. To order the operations, we use physical clocks for operations in different time-slots and logical clocks for operations within the same time-slot. We prove that our method guarantees a total ordering when using an appropriate grid width.

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  • 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.

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  • Anonymous mobile service collaboration: Quality of service

    Hinze, Annika; Rinck, Michael; Streader, David (2010)

    Conference item
    University of Waikato

    Mobile services depend on user context and preferences, and a mobile user’s context is constantly changing. Many services are only available locally. The most appropriate service for a user’s context is not known in advance and a user may enter or leave a service’s range at any time. For a seamless user experience, services need to collaborate. These complex collaborations should be instantaneous yet anonymous – without disclosing user information. The paper proposes a new service collaboration model using event-based interaction. A prototypical implementation is used to demonstrate functionality, inter-operability, and generality of our solution. The solution guarantees ad-hoc service collaboration while protecting user information.

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  • Contextual queries express mobile information needs

    Hinze, Annika; Chang, Carole; Nichols, David M. (2010)

    Conference item
    University of Waikato

    The users of mobile devices increasingly use networked services to address their information needs. Questions asked by mobile users are strongly influenced by contextual factors such as location, conversation and activity. We report on a diary study performed to better understand mobile information needs. We find that the type of questions recorded by participants varies across their locations, with differences between home, shopping and in-car contexts. These variations occur both in the query terms and in the form of desired answers. Both the location of queries and the participants' activities affected participants' questions. When information needs were affected by both location and activity, they tended to be strongly affected by both factors. The overall picture that emerges is one of multiple contextual influences interacting to shape mobile information needs. Mobile devices that attempt to adapt to users' context will need to account for a rich variety of situational factors.

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  • Designing a mobile augmented memory system for people with traumatic brain injuries

    Chang, Carole; Hinze, Annika; Bowen, Judy; Starkey, Nicola J. (2014)

    Conference item
    University of Waikato

    Augmented memory systems help people remember events in their lives. Individuals with Traumatic Brain Injury (TBI) often have memory impairments. We conducted a user study to learn about strategies individuals with TBI use to remember events in their lives. We explored what characteristics individuals with TBI expect of an augmented memory system. We then investigated these aspects in an initial mobile app design, and propose here a concept for a rehearsal application that addresses the issues found in our studies.

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  • Improving access to large-scale digital libraries through semantic-enhanced search and disambiguation

    Hinze, Annika; Taube-Schock, Craig; Bainbridge, David; Matamua, Rangi; Downie, J. Stephen (2015)

    Conference item
    University of Waikato

    With 13,000,000 volumes comprising 4.5 billion pages of text, it is currently very difficult for scholars to locate relevant sets of documents that are useful in their research from the HathiTrust Digital Libary (HTDL) using traditional lexically-based retrieval techniques. Existing document search tools and document clustering approaches use purely lexical analysis, which cannot address the inherent ambiguity of natural language. A semantic search approach offers the potential to overcome the shortcoming of lexical search, but even if an appropriate network of ontologies could be decided upon it would require a full semantic markup of each document. In this paper, we present a conceptual design and report on the initial implementation of a new framework that affords the benefits of semantic search while minimizing the problems associated with applying existing semantic analysis at scale. Our approach avoids the need for complete semantic document markup using pre-existing ontologies by developing an automatically generated Concept-in-Context (CiC) network seeded by a priori analysis of Wikipedia texts and identification of semantic metadata. Our Capisco system analyzes documents by the semantics and context of their content. The disambiguation of search queries is done interactively, to fully utilize the domain knowledge of the scholar. Our method achieves a form of semantic-enhanced search that simultaneously exploits the proven scale benefits provided by lexical indexing.

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  • SEPSen: Semantic event processing at the sensor nodes for energy efficient wireless sensor networks

    Kasi, Mumraiz Khan; Hinze, Annika; Legg, Catherine; Jones, Steve (2012)

    Conference item
    University of Waikato

    Traditionally in WSNs, the sensor nodes are used only for capturing data that is then later analyzed in the more powerful gateway nodes. This requires a continuous communication that wastes energy at the sensor nodes and greatly reduces the overall network lifetime. We propose a semantic-based in-network data processing that reduces energy consumption and improves the scalability of heterogeneous sensor networks. Ontology fragments in each sensor node help identify the data routed through the sensor network. We have adapted a matching algorithm to process a changing knowledge base. Simulation results show that the networks' energy consumption is considerably reduced.

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  • Model-driven GUI & interaction design using emulation

    Hinze, Annika; Bowen, Judy; Wang, Yuting; Malik, Robi (2010)

    Journal article
    University of Waikato

    This paper introduces a model-driven emulator for the interaction and GUI design of complex interacting systems. It allows systems that are engineered using formal methods and modelling to be tested with users before the final implementation. The user interface requirements are also specified in a formal model, which can be tested manually and automatically as required.

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  • Hermes: a notification service for digital libraries

    Faensen, Daniel; Faultstich, L.; Schweppe, Heinz; Hinze, Annika; Steidinger, A. (2001)

    Conference item
    University of Waikato

    The high publication rate of scholarly material makes searching and browsing an inconvenient way to keep oneself up-to-date. Instead of being the active part in information access, researchers want to be notified whenever a new paper in one's research area is published. While more and more publishing houses or portal sites offer notification services this approach has several disadvantages. We introduce the Hermes alerting service, a service that integrates a variety of different information providers making their heterogeneity transparent for the users. Hermes offers sophisticated filtering capabilities preventing the user from drowning in a flood of irrelevant information. From the user's point of view it integrates the providers into a single source. Its simple provider interface makes it easy for publishers to join the service and thus reaching the potential readers directly. This paper presents the architecture of the Hermes service and discusses the issues of heterogeneity of information sources. Furthermore, we discuss the benefits and disadvantages of message-oriented middleware for implementing such a service for digital libraries.

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