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Prelude to restoration in Ireland. The end of the Commonwealth, 1659–1660. By Aidan Clark. Pp. xii+376. Cambridge: Cambridge University Press, 1999. £37.50. 0 521 65061 5

Ronald Hutton
2000 The Journal of Ecclesiastical History  
By Aidan Clark. Pp. xiij.  ...  For the past half a century it has been served principally by sober and well-researched monographs, and Aidan Clarke has produced another of these, to cover the months between April  and June   ... 
doi:10.1017/s0022046900873637 fatcat:eegylsealvcmfm5rs3hghgbmgu

Equivalent groupoids have Morita equivalent Steinberg algebras [article]

Lisa Orloff Clark, Aidan Sims
2013 arXiv   pre-print
Let G and H be Hausdorff ample groupoids and let R be a commutative unital ring. We show that if G and H are equivalent in the sense of Muhly-Renault-Williams, then the associated Steinberg algebras of locally constant R-valued functions with compact support are Morita equivalent. We deduce that collapsing a "collapsible subgraph" of a directed graph in the sense of Crisp and Gow does not change the Morita-equivalence class of the associated Leavitt path R-algebra, and therefore a number of
more » ... hical constructions which yield Morita equivalent C^*-algebras also yield Morita equivalent Leavitt path algebras.
arXiv:1311.3701v1 fatcat:xopnwch4ivbqdkyl42fquj7hya

Robert Dudley Edwards (1909–88)

Aidan Clarke
1988 Irish historical studies  
arrogance, the perverseness, the passion, the erudite intuition, and the theatrical instinct that made him what he was, a great performer whose exuberance irradiated 'the dismal muse of Irish history'. 23 AIDAN  ...  CLARKE -Robert Dudley Edwards 127 that professionalised and objectified the study of the Irish past, but one wonders if the reformers were not too literal and mechanistic in their exposition of the creed  ... 
doi:10.1017/s0021121400009615 fatcat:ma5eor24vfe4pd2stbzr77qhte

Adversarial Video Generation on Complex Datasets [article]

Aidan Clark, Jeff Donahue, Karen Simonyan
2019 arXiv   pre-print
Generative models of natural images have progressed towards high fidelity samples by the strong leveraging of scale. We attempt to carry this success to the field of video modeling by showing that large Generative Adversarial Networks trained on the complex Kinetics-600 dataset are able to produce video samples of substantially higher complexity and fidelity than previous work. Our proposed model, Dual Video Discriminator GAN (DVD-GAN), scales to longer and higher resolution videos by
more » ... a computationally efficient decomposition of its discriminator. We evaluate on the related tasks of video synthesis and video prediction, and achieve new state-of-the-art Fr\'echet Inception Distance for prediction for Kinetics-600, as well as state-of-the-art Inception Score for synthesis on the UCF-101 dataset, alongside establishing a strong baseline for synthesis on Kinetics-600.
arXiv:1907.06571v2 fatcat:gyghutbufrdl5dgg5ijaemsuzm

Model-based cross-layer monitoring and adaptation of multilayer systems

Hui Song, Amit Raj, Saeed Hajebi, Aidan Clarke, Siobhán Clarke
2013 Science China Information Sciences  
With the vision of "Internet as a computer", complex software-intensive systems running on the Internet, or the "Internetwares", can be also divided into multiple layers. Each layer has a different focus, implementation technique, and stakeholders. Monitoring and adaptation of such multilayer systems are challenging, because the mismatches and adaptations are interrelated across the layers. This interrelation makes it difficult to find out: 1) When a system change causes mismatches in one
more » ... how to identify all the cascaded mismatches on the other layers? 2) When an adaptation is performed at one layer, how to find out all the complementary adaptations required in other layers? This paper presents a model-based approach towards cross-layer monitoring and adaptation of multilayer systems. We provide standard meta-modelling languages for system experts to specify the concepts and constraints separately for each layer, as well as the relations among the concepts from different layers. Within each individual layer, we use run-time models to represent the system state specific to this layer, monitor the systems by evaluating model changes according to specified constraints, and support manual or semi-automated adaption by modifying the models. When a change happens in the run-time model for one layer, either caused by system changes or by the adaptation, we synchronize the models for other layers to identify cascaded mismatches and complementary adaptations across the layers. We illustrate the approach on a simulated crisis management system, and are using it on a number of ongoing projects.
doi:10.1007/s11432-013-4915-5 fatcat:fddbrsplhnbgjcim6pdygv26jy

Water distribution network sectorisation using graph theory and many-objective optimisation

Saeed Hajebi, Ehsan Roshani, Nicolás Cardozo, Stephen Barrett, Aidan Clarke, Siobhán Clarke
2015 Journal of Hydroinformatics  
The water distribution network (WDN) sectorisation problem is characterised by structural and hydraulic requirements that make existing graph partitioning techniques inadequate to find a good solution. Specifically, sector isolation and direct access to at least one source for each sector are not addressed. This study proposes a method to address structural requirements of water network sectorisation with minimum negative impact on the hydraulic requirements. This paper first elaborates the
more » ... orisation problem and discusses the requirements of water network sectorisation. Then, it proposes a novel method, called WDN-PARTITION, which applies a new heuristic structural graph partitioning algorithm, combined with a many-objective optimisation procedure, to find near-optimal arrangements of nodes into sectors. The criteria of optimisation and their priorities can be specified for each case. The outcome of the method is a set of non-dominated sectorisation solutions, ranked lexicographically based on their values for the chosen criteria and their priorities, from which the final decision can be made by the domain experts. WDN-PARTITION has been implemented and integrated with a hydraulic network simulator. The simulation-based evaluation results demonstrate that WDN-PARTITION generally achieves its design objectives to partition a water network into isolated sectors with a minimal negative impact on the hydraulic performance criteria of the network.
doi:10.2166/hydro.2015.144 fatcat:5rt6efhwhzbqbjdfthaip2e4la

Podracer architectures for scalable Reinforcement Learning [article]

Matteo Hessel, Manuel Kroiss, Aidan Clark, Iurii Kemaev, John Quan, Thomas Keck, Fabio Viola, Hado van Hasselt
2021 arXiv   pre-print
Supporting state-of-the-art AI research requires balancing rapid prototyping, ease of use, and quick iteration, with the ability to deploy experiments at a scale traditionally associated with production systems.Deep learning frameworks such as TensorFlow, PyTorch and JAX allow users to transparently make use of accelerators, such as TPUs and GPUs, to offload the more computationally intensive parts of training and inference in modern deep learning systems. Popular training pipelines that use
more » ... se frameworks for deep learning typically focus on (un-)supervised learning. How to best train reinforcement learning (RL) agents at scale is still an active research area. In this report we argue that TPUs are particularly well suited for training RL agents in a scalable, efficient and reproducible way. Specifically we describe two architectures designed to make the best use of the resources available on a TPU Pod (a special configuration in a Google data center that features multiple TPU devices connected to each other by extremely low latency communication channels).
arXiv:2104.06272v1 fatcat:b2r6vt6w6rdc3j43ldxqipkzgi

Simplicity of algebras associated to étale groupoids

Jonathan Brown, Lisa Orloff Clark, Cynthia Farthing, Aidan Sims
2013 Semigroup Forum  
Aidan thanks his Dad for making him learn his Baire category theory. Perhaps you were right about eating vegetables too. . .  ... 
doi:10.1007/s00233-013-9546-z fatcat:cl3p6uwq6bcv5nbbqwdqu6o2t4

A groupoid generalization of Leavitt path algebras [article]

Lisa Orloff Clark, Cynthia Farthing, Aidan Sims, Mark Tomforde
2012 arXiv   pre-print
Clark, an Huef, and Raeburn subsequently proved versions of these theorems for Kumjian-Pask algebras [3] .  ...  Clark, an Huef, and Raeburn recently constructed a class of algebras associated to k-graphs, which they call Kumjian-Pask algebras [3] .  ... 
arXiv:1110.6198v2 fatcat:i2pkzplnhrgvjj34myo5nw5lpi

A groupoid generalisation of Leavitt path algebras

Lisa Orloff Clark, Cynthia Farthing, Aidan Sims, Mark Tomforde
2014 Semigroup Forum  
Clark, an Huef, and Raeburn recently constructed a class of algebras associated to k-graphs, which they call Kumjian-Pask algebras [3] .  ... 
doi:10.1007/s00233-014-9594-z fatcat:5aqydh6tv5hhzgdsvjbju7c7la

Simplicity of algebras associated to étale groupoids [article]

Jonathan H. Brown, Lisa Orloff Clark, Cynthia Farthing, Aidan Sims
2013 arXiv   pre-print
Aidan thanks his Dad for making him learn his Baire category theory. Perhaps you were right about eating vegetables too. . .  ... 
arXiv:1204.3127v2 fatcat:3hhcnilwxnhtzl7ajipqclb4be

Equivalent groupoids have Morita equivalent Steinberg algebras

Lisa Orloff Clark, Aidan Sims
2015 Journal of Pure and Applied Algebra  
Let G and H be Hausdorff ample groupoids and let R be a commutative unital ring. We show that if G and H are equivalent in the sense of Muhly-Renault-Williams, then the associated Steinberg algebras of locally constant R-valued functions with compact support are Morita equivalent. We deduce that collapsing a "collapsible subgraph" of a directed graph in the sense of Crisp and Gow does not change the Morita-equivalence class of the associated Leavitt path R-algebra, and therefore a number of
more » ... hical constructions which yield Morita equivalent C * -algebras also yield Morita equivalent Leavitt path algebras.
doi:10.1016/j.jpaa.2014.07.023 fatcat:dkxtcwmfiffcxfa6ruj4muppmu

Unsupervised Authorial Clustering Based on Syntactic Structure

Alon Daks, Aidan Clark
2016 Proceedings of the ACL 2016 Student Research Workshop  
This paper proposes a new unsupervised technique for clustering a collection of documents written by distinct individuals into authorial components. We highlight the importance of utilizing syntactic structure to cluster documents by author, and demonstrate experimental results that show the method we outline performs on par with state-of-the-art techniques. Additionally, we argue that this feature set outperforms previous methods in cases where authors consciously emulate each other's style or are otherwise rhetorically similar.
doi:10.18653/v1/p16-3017 dblp:conf/acl/DaksC16 fatcat:l466qyyawbbbhf4qmm4tsdbc5u

Simplicity of algebras associated to non-Hausdorff groupoids [article]

Lisa Orloff Clark, Ruy Exel, Enrique Pardo, Aidan Sims, Charles Starling
2019 arXiv   pre-print
LISA ORLOFF CLARK, RUY EXEL, ENRIQUE PARDO, AIDAN SIMS, AND CHARLES STARLING We note that in [12] and [13] , 'essentially principal' is defined to be what we are calling effective, see [12, Definition  ... 
arXiv:1806.04362v2 fatcat:7ttg7mouanhznotqvvpztbcwqu

Ideals of Steinberg algebras of strongly effective groupoids, with applications to Leavitt path algebras [article]

Lisa Orloff Clark, Cain Edie-Michell, Astrid an Huef, Aidan Sims
2016 arXiv   pre-print
We consider the ideal structure of Steinberg algebras over a commutative ring with identity. We focus on Hausdorff groupoids that are strongly effective in the sense that their reductions to closed subspaces of their unit spaces are all effective. For such a groupoid, we completely describe the ideal lattice of the associated Steinberg algebra over any commutative ring with identity. Our results are new even for the special case of Leavitt path algebras; so we describe explicitly what they say in this context, and give two concrete examples.
arXiv:1601.07238v1 fatcat:bovcxb2mvrbojnp37c2zh63f6u
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