Machine learning and design of experiments with an application to product innovation in the chemical industry

Industrial statistics plays a major role in the areas of both quality management and innovation. However, existing methodologies must be integrated with the latest tools from the field of Artificial Intelligence. To this end, a background on the joint application of Design of Experiments (DOE) and Machine Learning (ML) methodologies in industrial settings is presented here, along with a case study from the chemical industry. A DOE study is used to collect data, and two ML models are applied to predict responses which performance show an advantage over the traditional modeling approach. Emphasis is placed on causal investigation and quantification of prediction uncertainty, as these are crucial for an assessment of the goodness and robustness of the models developed. Within the scope of the case study, the models learned can be implemented in a semi-automatic system that can assist practitioners who are inexperienced in data analysis in the process of new product development.     

Homosexual not Homogeneous: A Motivation-Based Typology of Gay Leisure Travelers Holidaying in Cape Town,South Africa

ABSTRACT

The gay traveler, a segment of the lesbian, gay, bisexual, and transgender (LGBT) travel market, is perceived to be a homogeneous market segment as a result of the assumption that gay men have a unique “homosexual lifestyle.” This assumption is problematic as it conceals many other important variables, and it may hinder effective destination marketing. A Web-based electronic survey was completed by 469 gay male travelers, and attribute-based benefit segmentation was carried out by applying a hierarchical cluster analysis using Ward’s procedure with Euclidean distances. The typology is based on the push and pull framework; the motivations of travelers were assessed both in terms of their socio-psychological motivations and destination attributes of Cape Town. The typology empirically suggests that gay travelers are not homogeneous, and that sexuality influences the travel behavior of a minority of gay men. Consequently, not all gay travelers or activities by these travelers can be labeled as “gay” tourism.     

The Impact of Societal-Level Institutional Logics on Hybridity: Evidence from Nonprofit Organizations in England and France

We examine how societal-level institutional logics impact the way in which hybridity develops in nonprofit organizations using international, comparative and qualitative case studies of community regeneration organizations in England and France. The research applies theoretically based conjectures about types of hybridity to empirical data generated from 20 interviews, document analysis and observation in five nonprofits in the city of Lyon and five in Sheffield. We find that the French nonprofits are ‘blended’ hybrids that integrate state and community institutional logics, while ‘assimilated’ hybrids combining state, community and market logics are found in the English cases. Undertaking contextually situated analysis of institutional logics generates new knowledge on the influences on nonprofits’ rules, practices and narratives, so improving the level of knowledge about, and capacity to manage, this sector.     

Racism, IQ and Down's Syndrome

There is a consistent difference of some 15 IQ points between the test means of American black and white citizens, and there has been a fierce debate as to whether this can be best accounted for by black intellectual inferiority or by such environmental factors as prejudice and discrimination. However, even supporters of the environmental hypothesis have neglected to apply it to the population-people with Down's Syndrome - to which it is most clearly applicable, and this failure of imagination indicates the boundaries of discourse in the field of intellectual disability. The complex relationship between racism and prejudice against people with Disability is illustrated by Dr Down's use of the term 'mongolism'. Down's characterisation of people with intellectual impairment as equivalent both to children and to people of different races fits the need for a working explanation of intellectual impairment. The characterisation is none the less worthless, and we need new frames to shape our observations.     

Experimentation and Planning in Community Care

The dominant ideology in services for people with learning disabilities is clearly normalisation, or social role valorisation, as it has recently been termed. The emphasis is on the role that a person has within society. However, in Western society, what seems to be valued is power, individualism, enterprise, wealth, beauty and so on. It is not yet clear how we will be able to help people with learning disabilities to achieve such valued social roles. An alternative may be to consider whether we can design communities which value co-operation, affection and interdependence (rather than independence) and I shall describe first a fictional community which has such ideals, and then a real (albeit small) community, in Mexico, where conditions are arranged such that these ideals may be realised. I will then go on to outline some aspects of the philosophy which underpins these communities and which might be relevant to designing co-operative communities. These include the importance of setting objectives; the valuing of human diversity; the importance of viewing a person as a function of her or his social relations; acknowledging the complexity of human behaviour; and the distinction between rule-governed and contingency-shaped behaviour.     

Performance Decline and Turnaround in Public Organizations: A Theoretical and Empirical Analysis*

Public sector performance is currently a significant issue for management practice and policy, and especially the turnaround of those organizations delivering less than acceptable results. Theories of organizational failure and turnaround derive largely from the business sector and require adaptation to the public service. The performance of public organizations is more complex to measure, is related to institutional norms, and the idea of ‘failure’ is problematic. Empirical findings from a real‐time, longitudinal study of poorly performing English local authorities are used to develop an initial theory of performance failure and turnaround suited to public organizations. The paper argues that the typical performance of public organizations over time is cyclical. Where cognition and leadership capability are absent, organizations fail to self‐initiate turnaround. In this situation authoritative external intervention is necessary. The strategies applied are principally concerned with building a leadership capability that engages senior politicians and managers in order to overcome inertia and collective action problems. The theory is presented in the form of seven propositions that provide a basis for further research across the public sector.     

Psychology, Education and the Ghost of Kaspar Hauser

It is argued that the interventions of psychology have changed their predominant goals and orientation in recent times. Previously, psychology operated practices of differentiation within the school population, preserving the 'normal' through the exclusion of the deviant. Now, the predominant orientation is one of normalisation. The ideology of normalisation is shown to 'fit' with the generalities of the 'new', social-critical developmental psychology; but the predominant model for the implementation of normalisation practices utilises behavioural pedagogies and objectives-based curricula. The question is considered of whether there might be a social-developmental alternative.     

Emotions, embodiment and the sensation of society

The study of emotions has attracted an increased amount of attention from mainstream sociologists in recent years, both because of its potential to provide an added dimension to the analysis of such subjects as social conflict, gender inequalities and the organisation of the workplace, and as a result of its relevance to theoretical and methodological debates which have long characterised the discipline. This paper suggests that some of the core questions facing this subject can be interrogated productively by engaging critically with the work of one of the most important ‘founding figures’ of the discipline, Emile Durkheim. What Collins (1988) refers to as the ‘underground wing’ of Durkheim's work has yet to be fully utilised or developed by sociologists concerned with emotions, yet it provides us with a suggestive and provocative means of reconceptualising the gulf that often exists within contemporary work on emotions as malleable and controllable, on the one hand, and that concerned with emotions as intransigent ‘somatic states of being’, on the other. As such, Durkheim's writings constitute an important resource for sociologists concerned with the ongoing project of ‘embodying’ the discipline.     

Mark-resighting analysis of a California gull population

California gulls ( Larus californicus ) of known age and sex were censused on their breeding colony in 1979, 1980 and 1984 through 1993. Ages of 235 males and 196 females ranged from 4 to 27 years. Age classes used in the analysis were limited to 17, 4 through 19, and 20 or more as a final age category because data on gulls over 20 were sparse. Survival declined with age in a way that was parsimoniously modelled with a quadratic function. Other factors, sex and time, did not explain any variation in survival. Resighting depended on age, sex and time. Younger adults skipped breeding more frequently than did older adults, and females skipped breeding more frequently than did males. There was also good evidence for time dependence in resighting probability, but its inclusion in the model occurred at the expense of interpretability and precision. In a data set such as this, resighting probability may assume more importance than a mere 'nuisance parameter'. In this study, resighting history measured attendance at the breeding ground. In turn, attendance rates may be a manifestation of reproductive strategy, which can also have consequences for survival. In this situation, there may be heterogeneity in both survival and resighting probability that is unexplained by the model. While such complexity may well be a nuisance to deal with, it can also point to important biological questions.     

Tamworth, Australia's ‘country music capital’: place marketing, rurality, and resident reactions

Since the 1970s, Tamworth has become well known as Australia's ‘country music capital’. Its annual Country and Western Music Festival has become the leading event of its type in Australia, attracting over 60,000 visitors every year. The festival, and country music more generally, have become central to the town's identity and tourism marketing strategies. This article discusses the social constructions that have surrounded Tamworth's transition to ‘country music capital’—of the ‘rural’, and of ‘country’—within the context of debates about the politics of place marketing. Textual analysis of promotional material and built landscapes reveals representations of rurality (or ‘senses of the rural’). In their most commercial form, representations of rurality converge on a dominant notion of ‘country’, quite different from the ‘countryside’ and ‘rural idyll’ in England. This dominant, or normative ‘country’ forms the basis of imagery for the festival, the Town's marketing strategy, and associated advertising campaigns by major sponsors. It is predominantly masculine, white, working class and nationalist. But links between musical style and discourses of place are complex. Colonial British histories, Celtic musical traditions and North American popular culture all inform ‘country’ in Tamworth, dissipating nationalist interpretations. Normative constructions also contrast with other, heterogeneous ruralities in Australia, that include the lived experiences of rural Australians, and on stage—in country music—where multiple ‘ruralised’ identities are performed. Even those who stand to benefit from place promotion have been uncertain about country music and ‘the country’, because of associated discourses of Tamworth as ‘hick’ and ‘redneck’. In the final section of the paper, reactions of residents to constructions of Tamworth as country music capital are discussed, via the results of a simple resident survey. In contrast to previous studies of the disempowering politics of place marketing, Tamworth residents were on the whole supportive of the new associations and images for the town, despite ‘hick’ connotations, as it has become a centre for ‘country’, and for country music. Reasons for this are explored, and resistances discussed. The result is a complex and entangled politics of national identity, gender, race and class, where meanings for place are variously interpreted and negotiated.