A crowdsensing method for water resource monitoring in smart communities
- Authors: Banda, Clara Mloza
- Date: 2019
- Subjects: Data collection platforms
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/42449 , vital:36658
- Description: Crowdsensing aims to empower a large group of individuals to collect large amounts of data using their mobile devices, with the goal of sharing the collected data. Existing crowdsensing studies do not consider all the activities and methods of the crowdsensing process and the key success factors related to the process. Nor do they investigate the profile and behaviour of potential participants. The aim of this study was to design a crowdsensing method for water resource monitoring in smart communities. This study opted for an exploratory study using the Engaged Scholarship approach, which allows the study of complex real-world problems based on the different perspectives of key stakeholders. The proposed Crowdsensing Method considers the social, technical and programme design components. The study proposes a programme design for the Crowdsensing Methodwhich is crowdsensing ReferenceFrameworkthat includes Crowdsensing Processwith key success factors and guidelines that should be considered in each phase of the process. The method also uses the Theory of Planned Behaviour (TPB) to investigate citizens’intention to participate in crowdsensing for water resource monitoring and explores their attitudes, norms and perceived behavioural control on these intentions. Understanding the profiles of potential participants can assist with designing crowdsensing systems with appropriate incentive mechanisms to achieve adequate user participation and good service quality. A survey was conducted to validate the theoretical TB model in a real-world context. Regression and correlation analyses demonstrated that the attitudes, norms and perceived behavioural control can be used to predict participants’ intention to participate in crowdsensing for water resource monitoring. The survey results assisted with the development of an Incentive Mechanism as part of the Crowdsensing Method. This mechanism incorporates recruitment and incentive policies, as well as guidelines derived from the literature review and extant system analysis. The policies, called the OverSensepolicies, provide guidance for recruitment and rewarding of participants using the popular Stackelberg technique. The policies were evaluated using simulation experiments with a data set provided by the case study, the Nelson Mandela Bay Municipality. The results of the simulation experiments illustrated that the OverSenserecruitmentpolicycan reduce the computing resources required for the recruitment of participants and that the recruitment policy performs better than random or naïve recruitment policies. The proposed Crowdsensing Method was evaluated using an ecosystem of success factors for mobile-based interventions identified in the literature and the Crowdsensing Method adhered to a majority (90%) of the success factors. This study also contributes information systems design theory by proposing several sets of guidelines for crowdsensing projects and the development of crowdsensing systems. This study fulfils an identified need to study the applicability of crowdsensing for water resource monitoring and explores how a crowdsensing method can create a smart community.
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- Date Issued: 2019
A systematic review of operationalizations of culture in post traumatic stress
- Authors: Ramasodi, Precious , Cronje, Johan
- Date: 2019
- Subjects: Post-traumatic stress disorder
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/43037 , vital:36729
- Description: Research which looks at the influence of culture on posttraumatic experience has explored the culture construct through many differing lenses. This is because of the complex nature of culture. Since investigators may delineate culture in any number of ways there are a host of ways in which culture can be operationalised. The presence of differing operationalisations of culture in the literature is not necessarily a hindrance to the furtherance of knowledge. However, researchers may find it beneficial to employ similar operational terms in order for studies to be compared and amalgamated. The present study reviewed literature studies published between 1980 and 2018 that explored Post Traumatic Stress Disorder(PTSD) in different cultural cohorts. Thirty qualitative and quantitative research reports were assessed and six different operational terms were found. These were namely: geographic location, nationality, race, language, religion and ethnicity. Many articles in the pooled articles employed more than one operational to delineate the target population. The key themes which emerged from the pooled articles were the impact of differences between researcher and study participants, the differences in symptom expression and the stigma of the posttraumatic disorder.
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- Date Issued: 2019