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All Outputs (127)

Block Fusion on Dynamically Adaptive Spacetree Grids for Shallow Water Waves (2014)
Journal Article
Weinzierl, T., Bader, M., Unterweger, K., & Wittmann, R. (2014). Block Fusion on Dynamically Adaptive Spacetree Grids for Shallow Water Waves. Parallel Processing Letters, 24(3), Article 1441006. https://doi.org/10.1142/s0129626414410060

Spacetrees are a popular formalism to describe dynamically adaptive Cartesian grids. Even though they directly yield a mesh, it is often computationally reasonable to embed regular Cartesian blocks into their leaves. This promotes stencils working on... Read More about Block Fusion on Dynamically Adaptive Spacetree Grids for Shallow Water Waves.

Memoryless computation: New results, constructions, and extensions (2014)
Journal Article
Gadouleau, M., & Riis, S. (2015). Memoryless computation: New results, constructions, and extensions. Theoretical Computer Science, 562, 129-145. https://doi.org/10.1016/j.tcs.2014.09.040

In this paper, we are interested in memoryless computation, a modern paradigm to compute functions which generalises the famous XOR swap algorithm to exchange the contents of two variables without using a buffer. In memoryless computation, programs a... Read More about Memoryless computation: New results, constructions, and extensions.

The computational complexity of disconnected cut and 2K2-partition (2014)
Journal Article
Martin, B., & Paulusma, D. (2015). The computational complexity of disconnected cut and 2K2-partition. Journal of Combinatorial Theory, Series B, 111, 17-37. https://doi.org/10.1016/j.jctb.2014.09.002

For a connected graph G=(V,E), a subset U⊆V is called a disconnected cut if U disconnects the graph and the subgraph induced by U is disconnected as well. We show that the problem to test whether a graph has a disconnected cut is NP-complete. This pr... Read More about The computational complexity of disconnected cut and 2K2-partition.

Entropy of Closure Operators and Network Coding Solvability (2014)
Journal Article
Gadouleau, M. (2014). Entropy of Closure Operators and Network Coding Solvability. Entropy, 16(9), 5122-5143. https://doi.org/10.3390/e16095122

The entropy of a closure operator has been recently proposed for the study ofnetwork coding and secret sharing. In this paper, we study closure operators in relation to their entropy. We first introduce four different kinds of rank functions for a gi... Read More about Entropy of Closure Operators and Network Coding Solvability.

Blobs and curves: object-based colocalisation for plant cells (2014)
Journal Article
Nelson, C., Duckney, P., Hawkins, T., Deeks, M., Laissue, P., Hussey, P., & Obara, B. (2014). Blobs and curves: object-based colocalisation for plant cells. Functional Plant Biology, 42(5), 471-485. https://doi.org/10.1071/fp14047

Blobs and curves occur everywhere in plant bioimaging: from signals of fluorescence-labelled proteins, through cytoskeletal structures, nuclei staining and cell extensions such as root hairs. Here we look at the problem of colocalisation of blobs wit... Read More about Blobs and curves: object-based colocalisation for plant cells.

An evaluation of reconstruction filters for a path-searching task in 3D (2014)
Presentation / Conference Contribution
Roberts, D., Ivrissimtzis, I., & Holliman, N. (2014, September). An evaluation of reconstruction filters for a path-searching task in 3D. Presented at 2014 Sixth International Workshop on Quality of Multimedia Experience (QoMEX), Singapore, Singapore

The choice of reconstruction filter used to interpolate between sample points when generating images from volumetric data sets can have an impact on image quality. There are a range of reconstruction filters as well as methods to determine the qualit... Read More about An evaluation of reconstruction filters for a path-searching task in 3D.

Mixing of the Glauber Dynamics for the Ferromagnetic Potts Model (2014)
Journal Article
Bordewich, M., Greenhill, C., & Patel, V. (2016). Mixing of the Glauber Dynamics for the Ferromagnetic Potts Model. Random Structures and Algorithms, 48(1), 21-52. https://doi.org/10.1002/rsa.20569

We present several results on the mixing time of the Glauber dynamics for sampling from the Gibbs distribution in the ferromagnetic Potts model. At a fixed temperature and interaction strength, we study the interplay between the maximum degree (Δ) of... Read More about Mixing of the Glauber Dynamics for the Ferromagnetic Potts Model.

A two-tier index architecture for fast processing large RDF data over distributed memory (2014)
Presentation / Conference Contribution
Cheng, L., Kotoulas, S., Ward, T., & Theodoropoulos, G. (2014, September). A two-tier index architecture for fast processing large RDF data over distributed memory. Presented at 25th ACM conference on Hypertext and social media - HT '14, Santiago, Chile

We propose an efficient method for fast processing large RDF data over distributed memory. Our approach adopts a two-tier index architecture on each computation node: (1) a light-weight primary index, to keep loading times low, and (2) a dynamic, mul... Read More about A two-tier index architecture for fast processing large RDF data over distributed memory.

Improved Depth Recovery In Consumer Depth Cameras via Disparity Space Fusion within Cross-spectral Stereo (2014)
Presentation / Conference Contribution
Payen de La Garanderie, G., & Breckon, T. (2014, September). Improved Depth Recovery In Consumer Depth Cameras via Disparity Space Fusion within Cross-spectral Stereo. Presented at Proceedings of the British Machine Vision Conference

We address the issue of improving depth coverage in consumer depth cameras based on the combined use of cross-spectral stereo and near infra-red structured light sensing. Specifically we show that fusion of disparity over these modalities, within the... Read More about Improved Depth Recovery In Consumer Depth Cameras via Disparity Space Fusion within Cross-spectral Stereo.

Traceable interferometry using binary reconfigurable holograms (2014)
Journal Article
Cashmore, M., Hall, S., & Love, G. (2014). Traceable interferometry using binary reconfigurable holograms. Applied Optics, 53(24), 5353-5358. https://doi.org/10.1364/ao.53.005353

We describe the characterization of a ferroelectric-liquid-crystal-on-silicon (FLCOS) spatial light modulator (SLM) in the production of holograms for use in interferometric metrology. It has already been shown that such a device can be used in produ... Read More about Traceable interferometry using binary reconfigurable holograms.

Graph editing to a fixed target (2014)
Journal Article
Golovach, P., Paulusma, D., & Stewart, I. (2017). Graph editing to a fixed target. Discrete Applied Mathematics, 216(Part 1), 181-190. https://doi.org/10.1016/j.dam.2014.07.008

For a fixed graph H, the H-Minor Edit problem takes as input a graph G and an integer k and asks whether G can be modified into H by a total of at most k edge contractions, edge deletions and vertex deletions. Replacing edge contractions by vertex di... Read More about Graph editing to a fixed target.

Using Hadoop To Implement a Semantic Method Of Assessing The Quality Of Research Medical Datasets (2014)
Presentation / Conference Contribution
Bonner, S., Antoniou, G., Moss, L., Kureshi, I., Corsair, D., Tachmazidis, I., Chin, A., Xu, W., & Wang, F. (2014, August). Using Hadoop To Implement a Semantic Method Of Assessing The Quality Of Research Medical Datasets. Presented at The 2014 International Conference on Big Data Science and Computing - BigDataScience '14., Beijing, China

In this paper a system for storing and querying medical RDF data using Hadoop is developed. This approach enables us to create an inherently parallel framework that will scale the workload across a cluster. Unlike existing solutions, our framework us... Read More about Using Hadoop To Implement a Semantic Method Of Assessing The Quality Of Research Medical Datasets.

Multifaceted open social learner modelling (2014)
Book Chapter
Shi, L., Cristea, A., & Hadzidedic, S. (2014). Multifaceted open social learner modelling. In P. Elvira, R. W. Lau, K. Pata, H. Leung, & L. Mart (Eds.), Advances in Web-Based Learning – ICWL 2014, 13th International Conference, Tallinn, Estonia, August 14-17, 2014, Proceedings (32-42). Springer Verlag. https://doi.org/10.1007/978-3-319-09635-3_4

Open social learner modelling (OSLM) approaches are promoted in order to assist learners in self-directed and self-determined learning in a social context. Still, most approaches only focus on visualising learners’ performance, or providing complex t... Read More about Multifaceted open social learner modelling.

Robust and Efficient Large-Large Table Outer Joins on Distributed Infrastructures (2014)
Book Chapter
Cheng, L., Kotoulas, S., Ward, T., & Theodoropoulos, G. (2014). Robust and Efficient Large-Large Table Outer Joins on Distributed Infrastructures. In F. Silva, I. Dutra, & V. S. Costa (Eds.), Euro-Par 2014 Parallel Processing : 20th International Conference, Porto, Portugal, August 25-29, 2014 ; proceedings (258-269). Springer Verlag. https://doi.org/10.1007/978-3-319-09873-9_22

Outer joins are ubiquitous in many workloads but are sensitive to load-balancing problems. Current approaches mitigate such problems caused by data skew by using (partial) replication. However, contemporary replication-based approaches (1) introduce... Read More about Robust and Efficient Large-Large Table Outer Joins on Distributed Infrastructures.

High level saliency prediction for smart game balancing (2014)
Presentation / Conference Contribution
Koulieris, G. A., Drettakis, G., Cunningham, D., & Mania, K. (2014, August). High level saliency prediction for smart game balancing. Presented at ACM SIGGRAPH 2014 Talks ACM, Vancouver, Canada

Attention-aware rendering, mobile graphics and games (2014)
Presentation / Conference Contribution
McNamara, A., Mania, K., Koulieris, G. A., & Itti, L. (2014, August). Attention-aware rendering, mobile graphics and games. Presented at SIGGRAPH 2014 Courses, Vancouver, Canada

Context-aware material selective rendering for mobile graphics (2014)
Presentation / Conference Contribution
Koulieris, G. A., Drettakis, G., Cunningham, D., Sidorakis, N., & Mania, K. (2014, August). Context-aware material selective rendering for mobile graphics. Presented at ACM SIGGRAPH 2014 Posters (SIGGRAPH '14)., Vancouver, Canada

C-LOD: Context-aware Material Level-of-Detail applied to Mobile Graphics (2014)
Journal Article
Koulieris, G. A., Drettakis, G., Cunningham, D., & Mania, K. (2014). C-LOD: Context-aware Material Level-of-Detail applied to Mobile Graphics. Computer Graphics Forum, 33(4), 41-49. https://doi.org/10.1111/cgf.12411

Attention‐based Level‐Of–Detail (LOD) managers downgrade the quality of areas that are expected to go unnoticed by an observer to economize on computational resources. The perceptibility of lowered visual fidelity is determined by the accuracy of the... Read More about C-LOD: Context-aware Material Level-of-Detail applied to Mobile Graphics.