Adaptive user interfaces for mobile map-based visualisation
- Authors: Van Tonder, Bradley Paul
- Date: 2008
- Subjects: Cartography , Maps -- Design , Digital mapping , Geographic information systems , User interfaces (Computer systems) -- Design
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10470 , http://hdl.handle.net/10948/866 , Cartography , Maps -- Design , Digital mapping , Geographic information systems , User interfaces (Computer systems) -- Design
- Description: Mobile devices today frequently serve as platforms for the visualisation of map-based data. Despite the obvious advantages, mobile map-based visualisation (MMV) systems are often difficult to design and use. Limited screen space, resource constraints and awkward interaction mechanisms are among the many problems with which designers and users have to contend. Adaptive user interfaces (AUIs), which adapt to the individual user, represent a possible means of addressing the problems of MMV. Adaptive MMV systems are, however, generally designed in an ad-hoc fashion, making the benefits achieved difficult to replicate. In addition, existing models for adaptive MMV systems are either conceptual in nature or only address a subset of the possible input variables and adaptation effects. The primary objective of this research was to develop and evaluate an adaptive MMV system using a model-based approach. The Proteus Model was proposed to support the design of MMV systems which adapt in terms of information, visualisation and user interface in response to the user‟s behaviour, tasks and context. The Proteus Model describes the architectural, interface, data and algorithm design of an adaptive MMV system. A prototype adaptive MMV system, called MediaMaps, was designed and implemented based on the Proteus Model. MediaMaps allows users to capture, location-tag, organise and visualise multimedia on their mobile phones. Information adaptation is performed through the use of an algorithm to assist users in sorting media items into collections based on time and location. Visualisation adaptation is performed by adapting various parameters of the map-based visualisations according to user preferences. Interface adaptation is performed through the use of adaptive lists. An international field study of MediaMaps was conducted in which participants were required to use MediaMaps on their personal mobile phones for a period of three weeks. The results of the field study showed that high levels of accuracy were achieved by both the information and interface adaptations. High levels of user satisfaction were reported, with participants rating all three forms of adaptation as highly useful. The successful implementation of MediaMaps provides practical evidence that the model-based design of adaptive MMV systems is feasible. The positive results of the field study clearly show that the adaptations implemented were highly accurate and that participants found these adaptations to be useful, usable and easy to understand. This research thus provides empirical evidence that the use of AUIs can provide significant benefits for the visualisation of map-based information on mobile devices.
- Full Text:
- Date Issued: 2008
- Authors: Van Tonder, Bradley Paul
- Date: 2008
- Subjects: Cartography , Maps -- Design , Digital mapping , Geographic information systems , User interfaces (Computer systems) -- Design
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10470 , http://hdl.handle.net/10948/866 , Cartography , Maps -- Design , Digital mapping , Geographic information systems , User interfaces (Computer systems) -- Design
- Description: Mobile devices today frequently serve as platforms for the visualisation of map-based data. Despite the obvious advantages, mobile map-based visualisation (MMV) systems are often difficult to design and use. Limited screen space, resource constraints and awkward interaction mechanisms are among the many problems with which designers and users have to contend. Adaptive user interfaces (AUIs), which adapt to the individual user, represent a possible means of addressing the problems of MMV. Adaptive MMV systems are, however, generally designed in an ad-hoc fashion, making the benefits achieved difficult to replicate. In addition, existing models for adaptive MMV systems are either conceptual in nature or only address a subset of the possible input variables and adaptation effects. The primary objective of this research was to develop and evaluate an adaptive MMV system using a model-based approach. The Proteus Model was proposed to support the design of MMV systems which adapt in terms of information, visualisation and user interface in response to the user‟s behaviour, tasks and context. The Proteus Model describes the architectural, interface, data and algorithm design of an adaptive MMV system. A prototype adaptive MMV system, called MediaMaps, was designed and implemented based on the Proteus Model. MediaMaps allows users to capture, location-tag, organise and visualise multimedia on their mobile phones. Information adaptation is performed through the use of an algorithm to assist users in sorting media items into collections based on time and location. Visualisation adaptation is performed by adapting various parameters of the map-based visualisations according to user preferences. Interface adaptation is performed through the use of adaptive lists. An international field study of MediaMaps was conducted in which participants were required to use MediaMaps on their personal mobile phones for a period of three weeks. The results of the field study showed that high levels of accuracy were achieved by both the information and interface adaptations. High levels of user satisfaction were reported, with participants rating all three forms of adaptation as highly useful. The successful implementation of MediaMaps provides practical evidence that the model-based design of adaptive MMV systems is feasible. The positive results of the field study clearly show that the adaptations implemented were highly accurate and that participants found these adaptations to be useful, usable and easy to understand. This research thus provides empirical evidence that the use of AUIs can provide significant benefits for the visualisation of map-based information on mobile devices.
- Full Text:
- Date Issued: 2008
The career development of low socioeconomic status black South African adolescents: a career systems perspective
- Authors: Geijsendorpher, Clare
- Date: 2008
- Subjects: Blacks -- Education -- South Africa , Education and state -- South Africa , Vocational guidance -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9920 , http://hdl.handle.net/10948/670 , Blacks -- Education -- South Africa , Education and state -- South Africa , Vocational guidance -- South Africa
- Description: The adolescent stage of development entails many overt and covert challenges and influences that have bearing on spheres of later life, including career development. With South African counsellors being largely dependent on Western career theories, the influence of contextual factors such as cultural beliefs and historical background on the career development of South African adolescents has been largely ignored. The recent acknowledgement of the unique and complex interrelationship between individuals and their specific social, environmental and societal context has motivated the development of an overarching theoretical framework of career development, the Systems Theory Framework (STF). The present study has therefore employed the STF and a qualitative career assessment measure, the My System of Career Influences (MSCI), to facilitate in exploring and describing the unique systems of career influence on the career development of a group of South African adolescents. A non-probability, purposive sampling technique was employed to obtain the sample from a co-educational, Xhosa-speaking secondary school situated in a low socioeconomic area. The research approach was exploratory and descriptive in nature, and the MSCI assisted in the collection of qualitative and quantitative data from a sample of 64 Grade 9, 10 and 11 female and male black adolescents from low socioeconomic status environments. The qualitative data was subjected to content analysis to identify themes, while frequency counts/percentages were used for the quantitative data. The results of the study indicate that all influences within the three interrelated career systems have an influence on the career development of black adolescents. Furthermore, the MSCI workbook was shown to assist participants in identifying and evaluating significant systemic influences that have contributed to their career development to date. Participants from both genders and all grade levels were able to successfully complete the MSCI workbook and provide reflective comments on their MSCI personalised diagrams. The applicability of both the STF and the MSCI are acknowledged. Limitations and recommendations for future research based on the present findings are suggested.
- Full Text:
- Date Issued: 2008
- Authors: Geijsendorpher, Clare
- Date: 2008
- Subjects: Blacks -- Education -- South Africa , Education and state -- South Africa , Vocational guidance -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9920 , http://hdl.handle.net/10948/670 , Blacks -- Education -- South Africa , Education and state -- South Africa , Vocational guidance -- South Africa
- Description: The adolescent stage of development entails many overt and covert challenges and influences that have bearing on spheres of later life, including career development. With South African counsellors being largely dependent on Western career theories, the influence of contextual factors such as cultural beliefs and historical background on the career development of South African adolescents has been largely ignored. The recent acknowledgement of the unique and complex interrelationship between individuals and their specific social, environmental and societal context has motivated the development of an overarching theoretical framework of career development, the Systems Theory Framework (STF). The present study has therefore employed the STF and a qualitative career assessment measure, the My System of Career Influences (MSCI), to facilitate in exploring and describing the unique systems of career influence on the career development of a group of South African adolescents. A non-probability, purposive sampling technique was employed to obtain the sample from a co-educational, Xhosa-speaking secondary school situated in a low socioeconomic area. The research approach was exploratory and descriptive in nature, and the MSCI assisted in the collection of qualitative and quantitative data from a sample of 64 Grade 9, 10 and 11 female and male black adolescents from low socioeconomic status environments. The qualitative data was subjected to content analysis to identify themes, while frequency counts/percentages were used for the quantitative data. The results of the study indicate that all influences within the three interrelated career systems have an influence on the career development of black adolescents. Furthermore, the MSCI workbook was shown to assist participants in identifying and evaluating significant systemic influences that have contributed to their career development to date. Participants from both genders and all grade levels were able to successfully complete the MSCI workbook and provide reflective comments on their MSCI personalised diagrams. The applicability of both the STF and the MSCI are acknowledged. Limitations and recommendations for future research based on the present findings are suggested.
- Full Text:
- Date Issued: 2008
- «
- ‹
- 1
- ›
- »