512,366 research outputs found
Including design in e-manufacturing
No full textThis paper reviews major issues in the implementation of e-manufacturing, particularly the design aspects. It will examine recent progress, drawing out particular issues that are being addressed. Use will be made of the work by the author and colleagues to devise rule-based design and Internet-based control of machines to illustrate how these developments affect the integrated e-manufacturing environment. A dynamic Simulink model of the way e-manufacture is affected by overall design delays is used to evaluate general solutions for partial and complete e-based companies. These models show how changing to improved designs reduces WI
What does the future hold for drones in security and defence?
No full textAs drones and UAVs continue to permeate ever more sectors of society, Government Europa speaks to Dr Stephen Prior, from the University of Southampton, about the potential applications of drones in security and defence
RoMEO Studies 4: An analysis of Journal publishers' Copyright Agreements
No full textThis article is the fourth in a series of six emanating from the UK JISC-funded RoMEO Project (Rights Metadata for Open archiving). It describes an analysis of 80 scholarly journal publishers’ copyright agreements with a particular view to their effect on author self-archiving. 90% of agreements asked for copyright transfer and 69% asked for it prior to refereeing the paper. 75% asked authors to warrant that their work had not been previously published although only two explicitly stated that they viewed self-archiving as prior publication. 28.5% of agreements provided authors with no usage rights over their own paper. Although 42.5% allowed self-archiving in some format, there was no consensus on the conditions under which self-archiving could take place. The article concludes that author-publisher copyright agreements should be reconsidered by a working party representing the needs of both partie
Revisiting revisitation in computer interaction: organic bookmark management
No full textAccording to Milic-Frayling et al. (2004), there are two general ways of user browsing i.e. search (finding a website where the user has never visited before) and revisitation (returning to a website where the user has visited in the past). The issue of search is relevant to search engine technology, whilst revisitation concerns web usage and browser history mechanisms. The support for revisitation is normally through a set of functional built-in icons e.g. History, Back, Forward and Bookmarks. Nevertheless, for returning web users, they normally find it is easier and faster to re-launch an online search again, rather than spending time to find a particular web site from their personal bookmark and history records. Tauscher and Greenberg (1997) showed that revisiting web pages forms up to 58% of the recurrence rate of web browsing. Cockburn and McKenzie (2001) also stated that 81% of web pages have been previously visited by the user. According to Obendorf et al. (2007), revisitation can be divided into four classifications based on time: short-term (72.6% revisits within an hour), medium-term (12% revisits within a day and 7.8% revisits within a week), and long-term (7.6% revisits longer than a week
Specification of prior distributions under model uncertainty
No full textWe consider the specification of prior distributions for Bayesian model comparison, focusing on regression-type models. We propose a particular joint specification of the prior distribution across models so that sensitivity of posterior model probabilities to the dispersion of prior distributions for the parameters of individual models (Lindley's paradox) is diminished. We illustrate the behavior of inferential and predictive posterior quantities in linear and log-linear regressions under our proposed prior densities with a series of simulated and real data examples
Exporting empire: Africa, colonial officials and the construction of the British imperial state, c.1900?39
No full textFor Africans, rank and file colonial officials were the most visible manifestation of British imperial power. But in spite of their importance in administering such vast imperial territories, the attitudes of officials who served between the end of the nineteenth century and the Second World War, as well as what shaped such attitudes, have yet to be examined in any systematic way.In this original and revisionist work, Prior draws upon an enormous array of private and official papers to address some key questions about the colonial services. How did officials’ education and training affect the ways that they engaged with Africa? How did officials relate to one another? How did officials seek to understand Africa and Africans? How did they respond to infrastructural change? How did they deal with anti-colonial nationalism? This work will be of value to students and lecturers alike interested in British, imperial and African history
DIPOLE STABILIZING RODS SYSTEM FOR A FOUR-VANE RFQ : MODELING AND MEASUREMENT ON THE TRASCO RFQ ALUMINUM MODEL AT LNL
No full textThe Dipole Stabilizing Rods (DSR’s) are devices
used in order to reduce a priori the effect
of perturbation on the operating mode of
a four-vane RFQ caused by neighboring dipole modes by increasing the frequency spacing between the TE210 mode
and dipole modes, without, in principle, affecting the quadrupole TE210 mode. They have proven to be particularly
useful in the case of coupled RFQ’s whose overall length is significantly greater than the operatingwavelength. In this
article we present a circuit model of such DSR’s, that, used in combination with a transmission line model of a four
vane RFQ, has allowed us to predict the dimensioning of the DSR’s in the case of the aluminum model of TRASCO
RFQ. The DSR parameters and, in general, the accuracy of the model have been also confirmed by HFSS simulations
and by RF measurements on the above-mentioned model
Investigating novel applications for small unmanned aerial vehicles
No full textDr. Prior is currently supervising three PhD projects involving novel aspects of Unmanned Aerial Vehicles (UAVs) now referred to as Remotely Piloted Aircraft Systems (RPAS). The first investigates reconfigurable landing mechanisms for novel perch and stare applications. The other two research projects investigate efficient propulsion systems and Coanda vehicle design involving morphing strategies for small UAS
The uses and abuses of personal UAS
No full textNano UAVs promise much in terms of enhanced personal reconn aissance capabilities. But according to Dr Stephen Prior, there are a number of drawbacks to small multi-rotor aircraft, and the cost of procuring them is still relatively high. Does growing civilian use of these systems hold the key
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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