The purpose of this paper concerns the dimensions of relevance in information retrieval systems and their completeness in new retrieval contexts such as mobile search. Geography…
Abstract
Purpose
The purpose of this paper concerns the dimensions of relevance in information retrieval systems and their completeness in new retrieval contexts such as mobile search. Geography as a factor in relevance is little understood and information seeking is assumed to take place in indoor environments. Yet the rise of information seeking on the move using mobile devices implies the need to better understand the kind of situational relevance operating in this kind of context.
Design/methodology/approach
The paper outlines and explores a geographic information seeking process in which geographic information needs (conditioned by needs and tasks, in context) drive the acquisition and use of geographic information objects, which in turn influence geographic behaviour in the environment. Geographic relevance is defined as “a relation between a geographic information need” (like an attention span) and “the spatio‐temporal expression of the geographic information objects needed to satisfy it” (like an area of influence). Some empirical examples are given to indicate the theoretical and practical application of this work.
Findings
The paper sets out definitions of geographical information needs based on cognitive and geographic criteria, and proposes four canonical cases, which might be theorised as anomalous states of geographic knowledge (ASGK). The paper argues that geographic relevance is best defined as a spatio‐temporally extended relation between information need (an “attention” span) and geographic information object (a zone of “influence”), and it defines four domains of geographic relevance. Finally a model of geographic relevance is suggested in which attention and influence are modelled as map layers whose intersection can define the nature of the relation.
Originality/value
Geographic relevance is a new field of research that has so far been poorly defined and little researched. This paper sets out new principles for the study of geographic information behaviour.
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David Mountain and Jonathan Raper
Location‐based services are touted as the ‘killer applications’ of the mobile information revolution. This paper highlights some of the technical characteristics and limitations…
Abstract
Location‐based services are touted as the ‘killer applications’ of the mobile information revolution. This paper highlights some of the technical characteristics and limitations inherent in current mobile positioning technologies in order to set the current optimism surrounding Location‐Based Services (LBS) in context. A complex technical situation is revealed with different technologies providing results with very different spatial characteristics. Most current terrestrial solutions fail to provide results of sufficiently high spatial resolution for many of the proposed LBS applications, and satellite based solutions suffer from problems of reception and coverage in built up areas. The issue of georeferencing the services themselves is tackled and further work needs to be done on providing accurate spatial locations on the vast array of services that could be available through LBS. A current reluctance to temper these claims could arguably lead to unrealistic raising of the expectations of the buying public. The proven vulnerability of new technology to the fickleness of market opinion highlights that the technology may stand or fall not on its own merits, but on how it matches the expectations of the user.
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Abstract
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Abstract
Jonathan Houdmont, Liza Jachens, Raymond Randall and Jim Colwell
Job stressor exposure is associated with mental health in police officers. Police stress research rarely draws a distinction between urban and rural policing, raising the…
Abstract
Purpose
Job stressor exposure is associated with mental health in police officers. Police stress research rarely draws a distinction between urban and rural policing, raising the possibility that stressors specific to the rural context remain unidentified and their implications unknown. This may hinder actions to protect the mental health of those involved in policing rural communities.
Design/methodology/approach
Among rural policing teams in an English county police force this study used an exploratory sequential mixed method design to (1) identify and quantify exposure to rural policing stressors and (2) examine links between job stressor exposure and psychological distress.
Findings
Interviews (N = 34) identified three rural policing job stressor themes: (1) job demands, (2) isolation and (3) critical decisions. Survey data (N = 229) indicated significant differences in exposure by rank to demand and critical decision stressors, with police community support officers (PCSOs) reporting lower exposure than officers of constable and sergeant rank. Overall, 44% of respondents reported symptoms of psychological distress indicative of likely minor psychiatric disorder; higher levels of psychological distress were associated with higher stressor exposure across all three job stressor themes for PCSOs and constables and within the job demand theme for sergeants.
Originality/value
Findings point towards practical actions focussed on resource provision for officers and a research strategy to ameliorate the impact of stressors in English rural policing.
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Lucy Budd, Steven Griggs and David Howarth
This chapter examines the torsions and blind spots that structure the contemporary debate on the politics and policy of aviation. It also generates different scenarios for the…
Abstract
Purpose
This chapter examines the torsions and blind spots that structure the contemporary debate on the politics and policy of aviation. It also generates different scenarios for the future of air travel, which can help to unblock the current impasse about the perceived costs and benefits of aviation and its attendant infrastructural needs.
Originality
This chapter characterises and evaluates the competing frames that organise the contested realities of air transport. By mapping out the current fault lines of aviation politics and policy, the chapter is also able to delineate four main scenarios regarding the future of aviation, which we name the ‘post-carbon’, ‘high-modernist’, ‘market regulation’ and ‘demand management’ projections respectively.
Methodology/approach
The chapter problematises and criticises the existing literature, policy reports and stakeholder briefings that inform the contemporary standoff in UK aviation policy. It uses the definition of sustainable development as a heuristic device to map and identify the fault lines structuring contemporary debates on aviation futures. It then builds upon this analysis to delimit four different scenarios for the future of flying.
Findings
The chapter analyses the contested realities of aviation politics. It re-affirms the political nature of such divisions, which in turn structure the rival understandings of aviation. The analysis suggests that the identified fault lines are constantly reiterated by competing appeals to ambiguous and contradictory evidence-bases or policy frames. Ultimately, the chapter claims that any significant reframing of aviation policy and politics rests on the outcome of political negotiations and persuasion. But it also depends on the broader views of citizens and stakeholders about the future challenges facing society, as well as the way in which governments and affected agents put in place and coordinate the multiple arenas in which a dialogue over the future of aviation can be held. Aviation futures cannot be reduced to the narrow confines of the technical merits or claims surrounding the feasibility of policy instruments.
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Robert F. Bruner, Laurie Simon Hodrick and Sean Carr
At three o'clock in the morning on September 10, 2001, Thierry Hautillac, a risk arbitrageur, learns of the final agreement between Pinault-Printemps-Redoute SA (“PPR”) and LVMH…
Abstract
At three o'clock in the morning on September 10, 2001, Thierry Hautillac, a risk arbitrageur, learns of the final agreement between Pinault-Printemps-Redoute SA (“PPR”) and LVMH Moët Hennessy Louis Vuitton SA (“LVMH”). After a contest for control of Gucci lasting over two years, PPR has emerged as the winner. PPR and LVMH have agreed for PPR to buy about half of LVMH's stock in Gucci for $94 per share, for Gucci to pay an extraordinary dividend of $7 per share, and for PPR to give a two and a half year put option with a strike price of $101.50 to the public shareholders in Gucci. The primary task for the student in this case is to recommend a course of action for Hautillac: should he sell his 2% holding of Gucci shares when the market opens, continue to hold his shares, or buy more shares? The student must estimate the risky arbitrage returns from each of these choices. As a basis for this decision, the student must value the terms of payment and consider what the Gucci stock price will do upon the market's open. The student must determine the intrinsic value of Gucci using a DCF model as well as information on peer firms and transactions. The student must consider potential synergies between Gucci and PPR and between Gucci and LVMH. The student must assess the likelihood of a higher bid, using analysis of price changes at earlier events in the contest for clues.
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