Showing papers by "Lancaster University published in 2005"

The experience of work‐related stress across occupations

Abstract: Purpose – To compare the experience of occupational stress across a large and diverse set of occupations. Three stress related variables (psychological well‐being, physical health and job satisfaction) are discussed and comparisons are made between 26 different occupations on each of these measures. The relationship between physical and psychological stress and job satisfaction at an occupational level is also explored.Design/methodology/approach – The measurement tool used is a short stress evaluation tool which provides information on a number of work related stressors and stress outcomes. Out of the full ASSET database 26 occupations were selected for inclusion in this paper.Findings – Six occupations are reporting worse than average scores on each of the factors – physical health, psychological well‐being and job satisfaction (ambulance workers, teachers, social services, customer services – call centres, prison officers and police). Differences across and within occupational groups, for example, teac...

Systematically reviewing qualitative and quantitative evidence to inform management and policy-making in the health field

Abstract: Policy-makers and managers have always used a wide range of sources of evidence in making decisions about policy and the organization of services. However, they are under increasing pressure to adopt a more systematic approach to the utilization of the complex evidence base. Decision-makers must address complicated questions about the nature and significance of the problem to be addressed; the nature of proposed interventions; their differential impact; cost-effectiveness; acceptability and so on. This means that Cochrane-style reviews alone are not sufficient. Rather, they require access to syntheses of high-quality evidence that include research and non-research sources, and both qualitative and quantitative research findings. There is no single, agreed framework for synthesizing such diverse forms of evidence and many of the approaches potentially applicable to such an endeavour were devised for either qualitative or quantitative synthesis and/or for analysing primary data. This paper describes the key stages in reviewing and synthesizing qualitative and quantitative evidence for decision-making and looks at various strategies that could offer a way forward. We identify four basic approaches: narrative (including traditional 'literature reviews' and more methodologically explicit approaches such as 'thematic analysis', 'narrative synthesis', 'realist synthesis' and 'meta-narrative mapping'), qualitative (which convert all available evidence into qualitative form using techniques such as 'meta-ethnography' and 'qualitative cross-case analysis'), quantitative (which convert all evidence into quantitative form using techniques such as 'quantitative case survey' or 'content analysis') and Bayesian meta-analysis and decision analysis (which can convert qualitative evidence such as preferences about different outcomes into quantitative form or 'weights' to use in quantitative synthesis). The choice of approach will be contingent on the aim of the review and nature of the available evidence, and often more than one approach will be required.

Towards molecular spintronics.

Abstract: The ability to manipulate electron spin in organic molecular materials offers a new and extremely tantalizing route towards spin electronics, both from fundamental and technological points of view. This is mainly due to the unquestionable advantage of weak spin–orbit and hyperfine interactions in organic molecules, which leads to the possibility of preserving spin-coherence over times and distances much longer than in conventional metals or semiconductors. Here we demonstrate theoretically that organic spin valves, obtained by sandwiching an organic molecule between magnetic contacts, can show a large bias-dependent magnetoresistance and that this can be engineered by an appropriate choice of molecules and anchoring groups. Our results, obtained through a combination of state-of-the-art non-equilibrium transport methods and density functional theory, show that although the magnitude of the effect varies with the details of the molecule, large magnetoresistance can be found both in the tunnelling and the metallic limit.

Making the life of heavy metal-stressed plants a little easier

Abstract: The contamination of soils and water with metals has created a major environmental problem, leading to considerable losses in plant productivity and hazardous health effects. Exposure to toxic metals can intensify the production of reactive oxygen species (ROS), which are continuously produced in both unstressed and stressed plants cells. Some of the ROS species are highly toxic and must be detoxified by cellular stress responses, if the plant is to survive and grow. The aim of this review is to assess the mode of action and role of antioxidants in protecting plants from stress caused by the presence of heavy metals in the environment.

Toward a Dynamic Learning Perspective of Entrepreneurship

Abstract: This conceptual article introduces a dynamic learning perspective of entrepreneurship that builds upon existing “dominant” theoretical approaches to understanding entrepreneurial activity. As many aspects of entrepreneurial learning remain poorly understood, this article maps out and extends current boundaries of thinking regarding how entrepreneurs learn. It presents key conclusions from emergent empirical and conceptual work on the subject and synthesizes a broad range of contributory adult, management, and individual learning literature to develop a robust and integrated thematic conceptualization of entrepreneurial learning. Three distinctive, interrelated elements of entrepreneurial learning are proposed—dynamic temporal phases, interrelated processes, and overarching characteristics. The article concludes by demonstrating how a “learning lens” can be applied to create further avenues for research in entrepreneurship from a learning perspective.

A general proof of the conservation of the curvature perturbation

Abstract: Without invoking a perturbative expansion, we define the cosmological curvature perturbation, and consider its behaviour assuming that the universe is smooth over a sufficiently large comoving scale. The equations are simple, resembling closely the first-order equations, and they lead to results which generalize those already proven in linear perturbation theory and (in part) in second-order perturbation theory. In particular, the curvature perturbation is conserved provided that the pressure is a unique function of the energy density.

Board Monitoring and Earnings Management: Do Outside Directors Influence Abnormal Accruals?

Abstract: This paper examines whether the incidence of earnings management by UK firms depends on board monitoring. We focus on two aspects of board monitoring: the role of outside board members and the audit committee. Results indicate that the likelihood of managers making income-increasing abnormal accruals to avoid reporting losses and earnings reductions is negatively related to the proportion of outsiders on the board. We also find that the chance of abnormal accruals being large enough to turn a loss into a profit or to ensure that profit does not decline is significantly lower for firms with a high proportion of outside board members. In contrast, we find little evidence that outside directors influence income-decreasing abnormal accruals when pre-managed earnings are high. We find no evidence that the presence of an audit committee directly affects the extent of income-increasing manipulations to meet or exceed these thresholds. Neither do audit committees appear to have a direct effect on the degree of downward manipulation, when pre-managed earnings exceed thresholds by a large margin. Our findings suggest that boards contribute towards the integrity of financial statements, as predicted by agency theory.

Consumers, Producers and Practices: Understanding the Invention and Reinvention of Nordic Walking

Abstract: The idea that artifacts are acquired and used in the course of accomplishing social practices has important implications for theories of consumption and innovation. From this point of view, it is not enough to show that goods are symbolically and materially positioned, mediated and filtered through existing cultures and conventions. Twisting the problem around, the further challenge is to explain how practices change and with what consequence for the forms of consumption they entail. In this article, we suggest that new practices like Nordic walking, a form of ‘speed walking’ with two sticks, arise through the active and ongoing integration of images, artifacts and forms of competence, a process in which both consumers and producers are involved. While it makes sense to see Nordic walking as a situated social practice, such a view makes it difficult to explain its growing popularity in countries as varied as Japan, Norway and the USA. In addressing this issue, we conclude that practices and associated cultures of consumption are always ‘homegrown’. Necessary and sometimes novel ingredients (including images and artifacts) may circulate widely, but they are always pieced together in a manner that is informed by previous and related practice. What looks like the diffusion of Nordic walking is therefore better understood as its successive, but necessarily localized, (re)invention. In developing this argument, we explore some of the consequences of conceptualizing consumption and consumer culture as the outcome of meaningful social practice.

A temporal approach to linking aboveground and belowground ecology

Abstract: Ecologists are becoming increasingly aware of the role of aboveground–belowground relationships in controlling ecosystem processes and properties. Here, we review recent studies that show that relationships between aboveground and belowground communities operate over a hierarchy of temporal scales, ranging from days to seasons, to millennia, with differing consequences for ecosystem structure and function. We propose that a temporal framework is crucial to our understanding of the nature and ecological significance of relationships between aboveground and belowground communities.

The Moral Significance of Class

Abstract: The Moral Significance of Class, first published in 2005, analyses the moral aspects of people's experience of class inequalities. Class affects not only our material wealth but our access to things, relationships, and practices which we have reason to value, including the esteem or respect of others and hence our sense of self-worth. It shapes the kind of people we become and our chances of living a fulfilling life. Yet contemporary culture is increasingly 'in denial' about class, finding it embarrassing to acknowledge, even though it can often be blatantly obvious. By drawing upon concepts from moral philosophy and social theory and applying them to empirical studies of class, this fascinating and accessible study shows how people are valued in a context in which their life-chances and achievements are objectively affected by the lottery of birth class, and by forces which have little to do with their moral qualities or other merits.

Identity and Emergency Intervention: How Social Group Membership and Inclusiveness of Group Boundaries Shape Helping Behavior

Abstract: Two experiments exploring the effects of social category membership on real-life helping behavior are reported. In Study 1, intergroup rivalries between soccer fans are used to examine the role of identity in emergency helping. An injured stranger wearing an in-group team shirt is more likely to be helped than when wearing a rival team shirt or an unbranded sports shirt. In Study 2, a more inclusive social categorization is made salient for potential helpers. Helping is extended to those who were previously identified as out-group members but not to those who do not display signs of group membership. Taken together, the studies show the importance of both shared identity between bystander and victim and the inclusiveness of salient identity for increasing the likelihood of emergency intervention.

Peripheral Vision Discourse Analysis in Organization Studies: The Case for Critical Realism

Abstract: Although studies of organization certainly need to include analysis of discourse, one prominent tendency within current research on organizational discourse limits its value for organizational studies through a commitment to postmodernism and extreme versions of social constructivism. I argue that a version of critical discourse analysis based on a critical realist social ontology is potentially of greater value to organization studies, and I refer in particular to the contribution it can make to research on organizational change.

Inflationary prediction for primordial non-gaussianity.

Abstract: We extend the $\ensuremath{\delta}N$ formalism so that it gives all of the stochastic properties of the primordial curvature perturbation $\ensuremath{\zeta}$ if the initial field perturbations are Gaussian. The calculation requires only the knowledge of some family of unperturbed universes. A formula is given for the normalization ${f}_{\mathrm{NL}}$ of the bispectrum of $\ensuremath{\zeta}$, which is the main signal of non-Gaussianity. Examples of the use of the formula are given, and its relation to cosmological perturbation theory is explained.

Problems, problems, problems: The social construction of ‘leadership’

Abstract: The invasion of Iraq was premised upon accounts of the situation that have proved unsustainable, but that has not generated a change in the strategy of the coalition forces. Conventional contingency accounts of leadership suggest that accurate accounts of the context are a critical element of the decision-making apparatus but such accounts appear incapable of explaining the decisions of those engaged. An alternative model is developed that adapts the Tame and Wicked problem analysis of Rittell and Webber, in association with Etzioni’s typology of compliance, to propose an alternative analysis that is rooted in social constructivist approaches. This is then applied to three asymmetric case studies which suggest that decision-makers are much more active in the constitution of the context than conventional contingency theories allow, and that a persuasive rendition of the context then legitimizes a particular form of action that often relates to the decision-maker’s preferred mode of engagement, rather than ...

DC Resistivity and Induced Polarization Methods

Abstract: Direct current (DC) resistivity (here referred to as resistivity) and induced polarization (IP) methods allow, respectively, the determination of the spatial distribution of the low-frequency resistive and capacitive characteristics of soil. Since both properties are affected by lithology, pore fluid chemistry, and water content (see Chapter 4 of this volume), these methods have significant potential for hydrogeophysical applications. The methods can be applied at a wide range of laboratory and field scales, and surveys may be made in arbitrary geometrical configurations (e.g., on the soil surface and down boreholes). In fact, resistivity methods are one of the most widely used sets of geophysical techniques in hydrogeophysics. These surveys are relatively easy to carry out, instrumentation is inexpensive, data processing tools are widely available, and the relationships between resistivity and hydrological properties, such as porosity and moisture content, are reasonably well established. In contrast, applications of induced polarization methods in hydrogeophysics have been limited. As noted by Slater and Lesmes (2002), this is partly because of the more complex procedure for data acquisition, but also because the physicochemical interpretation of induced polarization parameters is not fully understood.

The Role, Use and Activation of Strong and Weak Network Ties: A Qualitative Analysis*

Abstract: A characteristic of studies seeking to explain the structure and operation of networks is the use of Granovetter's strong and weak tie hypothesis. Whilst this hypothesis has become an established paradigm, questions and disagreements arise over its applicability at demonstrating the real use and value of each tie. This study extends the work of Granovetter. Using a qualitative ethnographic approach to explore in-depth the networking activities of fourteen respondents, it aims to enhance understanding about the role of ties, how they are used and activated for business activity. Findings demonstrate that it is strong ties that are instrumental for business activity and used extensively to provide knowledge and information but also to maintain, extend and enhance business and personal reputations. Unless activities require their reactivation and manifestation, strong ties remain latent and dormant within the network. Strong ties also provide the mechanism to invoke ‘weak’ ties, represented by nodes operating in a wider social context.

Beyond the optimal contact strategy: a reality check for the contact hypothesis.

Abstract: The contact hypothesis proposes that interaction between members of different groups reduces intergroup prejudice if--and only if--certain optimal conditions are present. For over 50 years, research using this framework has explored the boundary conditions for ideal contact and has guided interventions to promote desegregation. Although supporting the contact hypothesis in principle, the authors critique some research practices that have come to dominate the field: (a) the prioritizing of the study of interactions occurring under rarefied conditions, (b) the reformulation of lay understandings of contact in terms of a generic typology of ideal dimensions, and (c) the use of shifts in personal prejudice as the primary measure of outcome. The authors argue that these practices have limited the contact hypothesis both as an explanation of the intergroup dynamics of desegregation and as a framework for promoting social psychological change. In so arguing, the authors look toward a complementary program of research on contact and desegregation.

City of God

Abstract: Well over a millennium and a half ago, Augustine distinguished between two cities: the Heavenly City and the Earthly City. While one was the site of all that was holy and spiritual, the place of faith, the other was foul and wicked, the realm of the flesh. Such dichotomies, expanded into a full‐fledged binary logic, persist in the way that we think about cities today. But as Bulent Diken shows in these reflections on Joao Fernando Meirelles' film—entitled, appropriately enough—City of God, cities today are bound up with the very things they try to exclude: ghettos, slums, and shanty‐towns. Binary urban logics in fact produce more grey than they do black and white. The notorious favela outside of Rio that is the subject of Meirelles' film is simultaneously included and excluded from all that Rio represents. It is at once a dumping ground for the city's byproducts—the (human) waste generated by its own development—and its products. It is a zone beyond the civilized city, which, as the city's inverted, carni...

The Complexity Turn

Abstract: A flock of birds sweeps across the sky. Like a well-choreographed dance troupe, the birds veer to the left in unison. . . . The flock is organized without an organizer, coordinated without a coordinator. Bird flocks are not the only things that work that way. Ant colonies, highway traffic, market economies, immune systems – in all of these systems, patterns are determined . . . by local interactions among decentralised components. (Resnick, 1997: 3)

‘Binge’ drinking, British alcohol policy and the new culture of intoxication

Abstract: Against the backdrop of a long-standing British ‘binge and brawl’ pattern of alcohol-based weekend leisure and concomitant recurrent anxieties in the media surrounding youth and young adults at play, this article considers the cultural distinctions of contemporary British leisure and the evidence for a ‘new’ culture of intoxication. Four key changes are identified which together, the authors argue, suggest significant change is underway in respect of patterns of alcohol consumption in the UK. Presenting empirical data for the first time, the article considers how one might assess the evidence for a new culture of intoxication which embraces both legal and illicit drugs and which encompasses a broad social spectrum of young people. The study concludes that the pursuit of altered states of intoxication must be positioned in late modern society as behaviour which is a vehicle for consumer and criminal justice discourses, both encouraged by economic deregulation and constrained by legislative change, indicative of the ambiguities at the heart of British alcohol policy.

Social exclusion, mobility and access.

Abstract: Much of the literature on social exclusion ignores its 'spatial' or 'mobility' related aspects. This paper seeks to rectify this by examining the mobile processes and infrastructures of travel and transport that engender and reinforce social exclusion in contemporary societies. To the extent to which this issue is addressed, it is mainly organized around the notion of 'access' to activities, values and goods. This paper examines this discourse in some detail. It is argued that there are many dimensions of such access, that improving access is a complex matter because of the range of human activities that might need to be 'accessed', that in order to know what is to be accessed the changing nature of travel and communications requires examination, and that some dimensions of access are only revealed through changes in the infrastructure that 'uncover' previously hidden social exclusions. Claims about access and socio-spatial exclusion routinely make assumptions about what it is to participate effectively in society. We turn this question around, also asking how mobilities of different forms constitute societal values and sets of relations, participation in which may become important for social inclusion. This paper draws upon an extensive range of library, desk and field research to deal with crucial issues relating to the nature of a fair, just and mobile society.

The vacuolar Ca2+-activated channel TPC1 regulates germination and stomatal movement.

Abstract: Cytosolic free calcium ([Ca2+]cyt) is a ubiquitous signalling component in plant cells. Numerous stimuli trigger sustained or transient elevations of [Ca2+]cyt that evoke downstream stimulus-specific responses. Generation of [Ca2+]cyt signals is effected through stimulus-induced opening of Ca2+-permeable ion channels that catalyse a flux of Ca2+ into the cytosol from extracellular or intracellular stores. Many classes of Ca2+ current have been characterized electrophysiologically in plant membranes. However, the identity of the ion channels that underlie these currents has until now remained obscure. Here we show that the TPC1 ('two-pore channel 1') gene of Arabidopsis thaliana encodes a class of Ca2+-dependent Ca2+-release channel that is known from numerous electrophysiological studies as the slow vacuolar channel. Slow vacuolar channels are ubiquitous in plant vacuoles, where they form the dominant conductance at micromolar [Ca2+]cyt. We show that a tpc1 knockout mutant lacks functional slow vacuolar channel activity and is defective in both abscisic acid-induced repression of germination and in the response of stomata to extracellular calcium. These studies unequivocally demonstrate a critical role of intracellular Ca2+-release channels in the physiological processes of plants.

Ontology in organization and management studies: a critical realist perspective

Abstract: Organization Studies has recently been captured by a cultural, linguistic, poststructural or postmodern turn, the impetus for which has come from the ontological turn from a (naive) realist ontology to a socially constructed ontology. Much of the current ontological discussion is, however, characterised by ambiguity which makes it difficult to get to the bottom of ontological claims and, of course, to locate the source of any ontological errors. This paper uses a critical realist perspective to highlight the ambiguity and error encouraged by postmodernism’s commitment to a socially constructed ontology. Critical realism’s ontology is offered as a more fruitful alternative. Labour process theory, specifically agency and structure to demonstrate (i) critical realism is not damaged by many common postmodern criticisms of agency and structure and (ii) once interpreted through the prism of critical realism, there is no need to abandon this powerful analytical device.

Travel time use in the information age

Abstract: This paper, focused primarily on UK data and debates, considers the potential significance of travel time use within past, present and future patterns of mobility. In transport scheme appraisal, savings in travel time typically represent a substantial proportion of the benefits of a scheme—benefits used to justify its often enormous financial costs. Such benefits are founded on the assumption that travel time is unproductive, wasted time in-between ‘real’ activities and which should be minimised. Travel demand analysis treats travel time and activity time as separate, albeit acknowledging an interdependency. The paper challenges these approaches by exploring how travel time can be, and is, being used ‘productively’ as activity time, and what enhancements to time use might be emerging in the ‘information age’. Such undermining of the division between activities and travelling, and between activity time and travel time, may have major implications for future levels of mobility, for the modal distribution of travel, for the validity of current transport appraisal methodology and for the analysis of travelling within the information age. These issues are considered.

Nanotechnology, Governance, and Public Deliberation: What Role for the Social Sciences?

Abstract: In this article we argue that nanotechnology represents an extraordinary opportunity to build in a robust role for the social sciences in a technology that remains at an early, and hence undetermined, stage of development. We examine policy dynamics in both the United States and United Kingdom aimed at both opening up, and closing down, the role of the social sciences in nanotechnologies. We then set out a prospective agenda for the social sciences and its potential in the future shaping of nanotechnology research and innovation processes. The emergent, undetermined nature of nanotechnologies calls for an open, experimental, and interdisciplinary model of social science research.

Free riding on Gnutella revisited: the bell tolls?

Abstract: A new analysis of free riding on the Gnutella network updates data from 2000 and points to an increasing downgrade in the network's overall performance and the emergence of a "metatragedy" of the commons. Individuals who use peer-to-peer (P2P) file-sharing networks such as Gnutella face a social dilemma. They must decide whether to contribute to the common good by sharing files or maximize their personal experience by free riding, downloading files while not contributing any to the network. Individuals gain no personal benefits from uploading files (in fact, it's inconvenient), so it's "rational" for users to free ride. However, significant numbers of free riders degrade the entire system's utility, creating a "tragedy of the digital commons."

Debating the future of comfort: environmental sustainability, energy consumption and the indoor environment

Abstract: Vast quantities of energy are consumed in heating and cooling to provide what are now regarded as acceptable standards of thermal comfort. In the UK as in a number of other countries, there is a real danger that responses in anticipation of global warming and climate change – including growing reliance on air-conditioning – will increase energy demand and CO2 emissions even further. This is an appropriate moment to reflect on the history and future of comfort, both as an idea and as a material reality. Based on interviews and discussions with UK policy makers and building practitioners involved in specifying and constructing what will become the indoor environments of the future, four possible scenarios are identified each with different implications for energy and resource consumption. By actively promoting debate about the indoor environment and associated ways of life, it may yet be possible to avoid becoming locked into social and technical trajectories that are ultimately unsustainable. The aim of th...