Exploratory data analysis with non-linear and missing data in geochemistry

Exploratory analysis of data seeks to find common patterns to gain insights into the structure and distribution of the data. In geochemistry it is a valuable means to gain insights into the complicated processes making up a petroleum system. Typically linear visualisation methods like principal components analysis, linked plots, or brushing are used. These methods can not directly be employed when dealing with missing data and they struggle to capture global non-linear structures in the data, however they can do so locally. This thesis discusses a complementary approach based on a non-linear probabilistic model. The generative topographic mapping (GTM) enables the visualisation of the effects of very many variables on a single plot, which is able to incorporate more structure than a two dimensional principal components plot. The model can deal with uncertainty, missing data and allows for the exploration of the non-linear structure in the data. In this thesis a novel approach to initialise the GTM with arbitrary projections is developed. This makes it possible to combine GTM with algorithms like Isomap and fit complex non-linear structure like the Swiss-roll. Another novel extension is the incorporation of prior knowledge about the structure of the covariance matrix. This extension greatly enhances the modelling capabilities of the algorithm resulting in better fit to the data and better imputation capabilities for missing data. Additionally an extensive benchmark study of the missing data imputation capabilities of GTM is performed. Further a novel approach, based on missing data, will be introduced to benchmark the fit of probabilistic visualisation algorithms on unlabelled data. Finally the work is complemented by evaluating the algorithms on real-life datasets from geochemical projects.

Researching primary engineering education:a UK perspective, an exploratory study

This paper draws attention to the findings of an exploratory study that critically identified and analysed relevant perceptions of elementary level engineering education within the UK. Utilising an approach based upon grounded theory methodology, 30 participants including teachers, representatives of government bodies and non-profit providers of primary level engineering initiatives were interviewed. Three main concepts were identified during the analysis of findings, each relevant to primary engineering education. These were pedagogic issues, exposure to engineering within the curriculum and children's interest. The paper concludes that the opportunity to make a real difference to children's education by stimulating their engineering imagination suggests this subject area is of particular value.

An exploratory study of the role of trust in medication management within mental health services

Objective - To develop understandings of the nature and influence of trust in the safe management of medication within mental health services. Setting - Mental health services in the UK. Method - Qualitative methods were applied through focus groups across three different categories of service user—older adult, adults living in the community and forensic services. An inductive thematic analysis was carried out, using the method of constant comparison derived from grounded theory. Main Outcome - Measure Participants’ views on the key factors influencing trust and the role of trust in safe medication management. Results - The salient factors impacting trust were: the therapeutic relationship; uncertainty and vulnerability; and social control. Users of mental health services may be particularly vulnerable to adverse events and these can damage trust. Conclusion - Safe management of medication is facilitated by trust. However, this trust may be difficult to develop and maintain, exposing service users to adverse events and worsening adherence. Practice and policy should be oriented towards developing trust.

Knowledge-based development in leading regions across the globe:an exploratory analysis of the co-evolution of resources, capabilities, and outputs

It is widely observed that the global geography of innovation is rapidly evolving. This paper presents evidence concerning the contemporary evolution of the globe's most productive regions. The paper uncovers the underlying structure and co-evolution of knowledge-based resources, capabilities and outputs across these regions. The analysis identifies two key trends by which the economic evolution and growth patterns of these regions are differentiated-namely, knowledge-based growth and labour market growth. The knowledge-based growth factor represents the underlying commonality found between the growth of economic output, earnings and a range of knowledge-based resources. The labour market growth factor represents the capability of regions to draw on their human capital. Overall, spectacular knowledge-based growth of leading Chinese regions is evident, highlighting a continued shift of knowledge-based resources to Asia. It is concluded that regional growth in knowledge production investment and the capacity to draw on regional human capital reserves are neither necessarily traded-off nor complementary to each other. © 2012 Urban Studies Journal Limited.

Control of electronic channel affiliates:an exploratory study and research propositions

Electronic channel affiliates are important online intermediaries between customers and host retailers. However, no work has studied how online retailers control online intermediaries. By conducting an exploratory content analysis of 85 online contracts between online retailers and their online intermediaries, and categorizing the governing mechanisms used, insights into the unique aspects of the control of online intermediaries are presented. Findings regarding incentives, monitoring, and enforcement are presented. Additionally, testable research propositions are presented to guide further theory development, drawing on contract theory, resource dependence theory and agency theory. Managerial implications are discussed. © 2012 Elsevier Inc.

Internet technologies, ECRM capabilities, and performance benefits for SMEs:An exploratory study

Research on large firms suggests that dedicated customer relationship management (CRM) software applications play a critical role in creating and sustaining customer relationships. CRM is also of strategic importance to small and medium-sized enterprises (SMEs), but most of them do not employ dedicated CRM software. Instead they use generic Internet-based technologies to manage customer relationships with electronic CRM (eCRM). There has been little research on the extent to which the use of generic Internet technologies contributes to SME performance. The present study fills the gap, building upon the literature on organizational capabilities, marketing, and SMEs to develop a research model with which to explore the relationships between generic Internet technologies, eCRM capabilities, and the resulting performance benefits in the SME context. A survey across 286 SMEs in Ireland finds strong empirical evidence in support of the hypotheses regarding these benefits. The study contributes to managerial decision making by showing how SMEs can use generic Internet technologies to advance their customer relationships and contributes to theory development by conceptualizing eCRM capabilities in an SME context.

Victims of cyberstalking:an exploratory study of harassment perpetrated via the Internet

This paper describes the first study to focus exclusively on the prevalence and impact of cyberstalking. A Web-based questionnaire was used to collect data from a group of respondents who were recruited by snowball sampling via e-mail. A total of 169 respondents completed the questionnaire. The results of the study found that approximately a third of respondents might be considered victims of cyberstalking. Furthermore, when asked to indicate the level of distress felt as a result of their experiences, almost a quarter of respondents chose a value of ten on a ten-point scale. The study also suggests a number of differences between cyberstalking and offline stalking, for instance cyberstalking tends to take place over a shorter period of time than offline stalking and cyberstalking victims are less likely to know the identify of their harassers. These differences add weight to the argument that cyberstalking should be seen as a new form of deviant behaviour that can be distinguished from offline stalking. The work concludes by emphasising a need for further research.

The atypical bilingual courtroom:an exploratory study of the interactional dynamics in interpreter-mediated trials in Hong Kong

This study investigates the communication process in the atypical bilingual Hong Kong courtroom, where, unlike in most other jurisdictions, interpreting services are routinely provided for the linguistic majority instead of the linguistic minority and the interpreter usually has to work with court actors who share his/her bilingual knowledge. It sets out to explore how the unique nature of the bilingual Hong Kong courtroom impacts on interactional dynamics in communicative process in the courtroom and potentially on the administration of justice, using authentic recordings of nine criminal trials from three court levels, supplemented by a survey administered to court interpreters. It compares the participant roles of different court actors in different court settings, monolingual and bilingual, using Goffman’s (1981) participation framework and Bell’s (1984) audience design as the conceptual framework. It is found that the notion of recipientship in the atypical bilingual Hong Kong courtroom is complicated by the presence of other bilinguals, which inevitably changes the interactional dynamics and impacts on the power of court interpreter as these bilinguals take on more participant roles in the process. The findings of this study show that the power of court actors is realised in the participant role(s) they and the other co-present court actors take on or are capable of playing. The findings also indicate that a change in the participant role of a court actor has an impact on the participation status other actors, which may in turn hamper the administration of justice. It is also found that the notion of power asymmetry in the courtroom has an effect on the footings adopted by the interpreter and thus on his/her neutrality. This thesis identifies training needs and makes recommendations for best practice in the courtroom and for institutional administrative practice.

An exploratory analysis of some taken for granted aspects of the hospital teacher's role

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Feed-forward neural networks and topographic mappings for exploratory data analysis

A recent novel approach to the visualisation and analysis of datasets, and one which is particularly applicable to those of a high dimension, is discussed in the context of real applications. A feed-forward neural network is utilised to effect a topographic, structure-preserving, dimension-reducing transformation of the data, with an additional facility to incorporate different degrees of associated subjective information. The properties of this transformation are illustrated on synthetic and real datasets, including the 1992 UK Research Assessment Exercise for funding in higher education. The method is compared and contrasted to established techniques for feature extraction, and related to topographic mappings, the Sammon projection and the statistical field of multidimensional scaling.

The development of an objective methodology to measure medication adherence to oral thiopurines in paediatric patients with acute lymphoblastic leukaemia - an exploratory study

Aims - To develop a method that prospectively assesses adherence rates in paediatric patients with acute lymphoblastic leukaemia (ALL) who are receiving the oral thiopurine treatment 6-mercaptopurine (6-MP). Methods - A total of 19 paediatric patients with ALL who were receiving 6-MP therapy were enrolled in this study. A new objective tool (hierarchical cluster analysis of drug metabolite concentrations) was explored as a novel approach to assess non-adherence to oral thiopurines, in combination with other objective measures (the pattern of variability in 6-thioguanine nucleotide erythrocyte concentrations and 6-thiouric acid plasma levels) and the subjective measure of self-reported adherence questionnaire. Results - Parents of five ALL patients (26.3%) reported at least one aspect of non-adherence, with the majority (80%) citing “carelessness at times about taking medication” as the primary reason for non-adherence followed by “forgetting to take the medication” (60%). Of these patients, three (15.8%) were considered non-adherent to medication according to the self-reported adherence questionnaire (scored ≥ 2). Four ALL patients (21.1%) had metabolite profiles indicative of non-adherence (persistently low levels of metabolites and/or metabolite levels clustered variably with time). Out of these four patients, two (50%) admitted non-adherence to therapy. Overall, when both methods were combined, five patients (26.3%) were considered non-adherent to medication, with higher age representing a risk factor for non-adherence (P < 0.05). Conclusions - The present study explored various ways to assess adherence rates to thiopurine medication in ALL patients and highlighted the importance of combining both objective and subjective measures as a better way to assess adherence to oral thiopurines.

An exploratory study of ICT usage in small logistics service providers

Information and communication technology (ICT) developments have strongly affected supply chain management (SCM) in recent years. ICT has had a great impact on all supply chain processes including planning, purchasing, production management, stock management, physical distribution and related integration management. Technology has become an important dimension of third party logistics (3PL) service supply as competitive advantage increasingly depends on the ability to create value for customers through the effective application of ICT. Within this process, while large 3PLs are gaining substantial benefits from technology usage and implementation, the magnitude of changes spurred by ICT dissemination in small logistics service providers remains unclear. This is reflected by the existing gap in literature where the role and competitive developing processes of small 3PLs are seriously underestimated. This gives rise to the need to develop research and investigation in this particular area. The objective of this paper is to narrow the knowledge gap in the field of ICT adoption in small 3PLs through an empirical investigation. It presents the results of a survey on a sample of small Italian 3PLs.

An exploratory analysis of corporate social responsibility:definitions, motives and values

Corporate Social Responsibility (CSR) is a multi-disciplinary subject and definitions vary with regard to the perceived scope or boundaries of the corporation’s responsibility. In this paper, corporate motives for CSR are explored, along with the notion of an altruistic ethical impulse among business leaders or managers, perhaps motivated by religious beliefs. It is suggested that the formal adoption of CSR by corporations could be associated with the changing personal values of managers and that there may be an association between different industries, the personal values of the managers who work in them and their commitment to CSR. This paper is preparatory to an empirical investigation that will address how corporate social responsibility (CSR) is interpreted and institutionalised by organisations, including an analysis of firms’ perceptions of the boundaries regarding where and to whom their corporate social responsibilities lie.

Postgraduate study and managers' subsequent work experience:an exploratory evaluation

Drawing on an exploratory qualitative study, this article considers the link between business school teaching at graduate level and subsequent work behaviour and experiences of former students. It evaluates the student experience some time after graduation. The findings of the retrospective evaluation point to the value of classroom peer discussion, the testing of ideas against prior work experience and the opportunity to make sense of organisational issues by setting them into broader context. The importance of andragogical approaches to teaching is discussed as well as the implications of the study findings for teaching quality enhancement. © 2009 Taylor & Francis.