54,210 research outputs found
Stuart Griffiths
No full textAn article in Jocks&Nerds magazine about the 90s rave photographs by Stuart Griffiths. With reference to Griffiths' own writing for the forthcoming book Pigs Disco, this text examines Griffiths' encounters with the rave scene and incorporates research into this under-explored subjec
The “pastoral” in virtual space: A tale of two systems, and how e-learning practitioners remake them
No full textMary Griffiths and Michael Griffithshttp://www.igi-global.com/books/details.asp?id=616
Eliciting expert judgement for the probability of AUV loss in contrasting operational environments
No full textEach time an autonomous underwater vehicle (AUV)
is used in the sea there is a non-zero probability of
loss. Quantifying probability of loss is not an exact
science; therefore much depends on the fault history
of the vehicle, the operational environment and the
complex relationships between the consequences of
faults or incidents and the environment. While this
problem may be stated in scientific terms, in practice,
there is no solution through scientific means alone.
This is an example of ‘trans-science’. We suggest that
an approach based on the formal process of eliciting
expert judgement may be an effective means of
approaching this problem, as the process has been
used successfully for other trans-scientific questions.
The paper provides an introduction to the process of
eliciting expert judgement, outlines four exemplar
environments: coastal, open water, under sea ice and
under shelf ice, and gives a worked example of one
expert’s judgement on the probability of loss in the
four environments arising from a real fault with the
Autosub1 AUV. Using the fault history of the
Autosub3 AUV, included in the Annex, we ask
experts from among UUST attendees (and others) to
take part in this expert judgement elicitation. Based
on the results of this elicitation we aim to publish a
paper in the peer-reviewed literature
A Markov Chain state transition approach to establishing critical phases for AUV reliability
No full textThe deployment of complex autonomous underwater platforms for marine science comprises a series of sequential steps. Each step is critical to the success of the mission. In this paper we present a state transition approach, in the form of a Markov chain, which models the sequence of steps from pre-launch to operation to recovery. The aim is to identify the states and state transitions that present higher risk to the vehicle and hence to the mission, based on evidence and judgment. Developing a Markov chain consists of two separate tasks. The first defines the structure that encodes the sequence of events. The second task assigns probabilities to each possible transition. Our model comprises eleven discrete states, and includes distance-dependent underway survival statistics. The integration of the Markov model with underway survival statistics allows us to quantify the likelihood of success during each state and transition and consequently the likelihood of achieving the desired mission goals. To illustrate this generic process, the fault history of the Autosub3 autonomous underwater vehicle provides the information for different phases of operation. The method proposed here adds more detail to previous analyses; faults are discriminated according to the phase of the mission in which they took place
Dikwa Griffiths 1974
No full textGenus Dikwa Griffiths, 1974 Dikwa Griffiths, 1974: 266; type species: Dikwa acrania Griffiths, 1974. Dikwa – Griffiths 1977: 108–109. — Watling & Thurston 1989: 304, 307, 310. — J.L. Barnard & Karaman 1991: 381, 392–393. — Coleman 2007: 27.Published as part of d'Acoz, Cédric d'Udekem & Verheye, Marie L., 2017, Epimeria of the Southern Ocean with notes on their relatives (Crustacea, Amphipoda, Eusiroidea), pp. 1-553 in European Journal of Taxonomy 359 on page 164, DOI: 10.5852/ejt.2017.359, http://zenodo.org/record/385569
Results of expert judgments on the faults and risks with Autosub3 and an analysis of its campaign to Pine Island Bay, Antarctica, 2009
No full textProbabilistic risk assessment is a methodology that can be systematically applied to estimate the risk associated with the design and operation of complex systems. The National Oceanography Centre, Southampton, UK has developed a risk management process tailored to the operation of autonomous underwater vehicles. Central to the application of the risk management process is a probabilistic risk assessment. The risk management process was applied to estimate the risk associated with an Autosub3 science campaign in the Pine Island Glacier, Antarctica, and to support decision making. The campaign was successful. In this paper we present the Autosub3 risk model and we show how this model was used to assess the campaign risk
Closer: photographs by Stuart Griffiths
No full textExhibition curated for the 'Brighton Photo Biennale Fringe', of the photographs and archives of Stuart Griffiths.
This exhibition resulted from Stuart Griffiths' selection for the BPB Fringe 'Open' Award. After being a member of the judging panel, Val Williams curated the exhibition, which took place at the Phoenix Arts Centre in Brighton.
As well as the work on ex-military veterans which had formed the basis of the award, Williams and Griffiths explored Griffiths archives of letters, snapshots and drawings. These were used in the exhibition to create a history and context. Williams also created a Reading Room, which featured a selection of Griffiths' reference material, and included a combination of literary fiction and photo books.
Since the exhibition in Brighton, Griffiths has published a monograph of his Northern Ireland photographs and has established connections with museums and galleries which are interested in his work and in the CLOSER exhibition.
The exhibition illustrates the value of archives when exploring a contemporary body of work and how the use of supplementary material in a curatorial context can enhance and explain
Reflections of a Researcher Teacher
No full textIn this retrospective, autobiographical account, the author traces her career as a teacher, teacher educator and researcher, identifying critical incidents and key influences alongside changes in education and teacher education. The persistence of teacher and researcher identities, stemming from the early influence of Lawrence Stenhouse, is highlighted, as well as a continuing commitment to feminist research and innovative practice; but identity shifts and transitions are also prominent, according to personal and external contexts, policies and communities of practice
Three Kinds of Disambiguated Author ID Systems for PubMed 2019
No full textAuthor identifier (ID) is essential for many downstream tasks, such as co-author network and scientist mobility analysis. As a widely used bibliometrics database, author ID of PubMed is not officially provided by National Institutes of Health (NIH), that restrict bibliometric research. This study exploited three open bibliographic databases Aminer, Microsoft Academic Graph (MAG) and Semantic Scholar (S2) to associate author ID for PubMed. For this purpose, paper linking and author linking was performed sequencely to mine paper and author links between PubMed and these databases. Performance of author name disambiguation (AND) of there available identifiers was evaluated on two AND datasets. Our findings suggested that, S2 contains full volume of PubMed regarding link completeness. With respect to correctness of author ID, S2 and MAG achieved better performance than Aminer. The best F1 score on both dataset of there available identifiers is below 90\%, indicate that AND for large scale database remain as a difficult task and the need for further improvement. We made the final dataset that contains linked paper and author of PubMed publicly available for facilitating future research
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