Search

Your search keyword '"McGillivray, Donald"' showing total 29 results
Start Over Author "McGillivray, Donald" Search Limiters Available in Library Collection
29 results on '"McGillivray, Donald"'

1. Improving the Efficiency of Payments Systems Using Quantum Computing

Author

McMahon, Christopher, McGillivray, Donald, Desai, Ajit, Rivadeneyra, Francisco, Lam, Jean-Paul, Lo, Thomas, Marsden, Danica, and Skavysh, Vladimir

Subjects
Quantum Physics, Computer Science - Computational Engineering, Finance, and Science, Computer Science - Emerging Technologies, Mathematics - Quantum Algebra
Abstract

High-value payment systems (HVPSs) are typically liquidity-intensive as the payment requests are indivisible and settled on a gross basis. Finding the right order in which payments should be processed to maximize the liquidity efficiency of these systems is an $NP$-hard combinatorial optimization problem, which quantum algorithms may be able to tackle at meaningful scales. We developed an algorithm and ran it on a hybrid quantum annealing solver to find an ordering of payments that reduced the amount of system liquidity necessary without substantially increasing payment delays. Despite the limitations in size and speed of today's quantum computers, our algorithm provided quantifiable efficiency improvements when applied to the Canadian HVPS using a 30-day sample of transaction data. By reordering each batch of 70 payments as they entered the queue, we achieved an average of C\$240 million in daily liquidity savings, with a settlement delay of approximately 90 seconds. For a few days in the sample, the liquidity savings exceeded C\$1 billion. This algorithm could be incorporated as a centralized preprocessor into existing HVPS without entailing a fundamental change to their risk management models.

Published
2022

3. Improving the Efficiency of Payments Systems Using Quantum Computing.

Author

McMahon, Christopher, McGillivray, Donald, Desai, Ajit, Rivadeneyra, Francisco, Lam, Jean-Paul, Lo, Thomas, Marsden, Danica, and Skavysh, Vladimir

Subjects
QUANTUM annealing, PAYMENT systems, SIMULATED annealing, COMBINATORIAL optimization, QUANTUM computing
Abstract

High-value payment systems (HVPSs) are typically liquidity intensive because payments are settled on a gross basis. State-of-the-art solutions to this problem include algorithms that seek netting sets and allow for ad hoc reordering of submitted payments. This paper introduces a new algorithm that explores the entire space of payments reordering to improve the liquidity efficiency of these systems without significantly increasing payment delays. Finding the optimal payment order among the entire space of reorderings is, however, an NP-hard combinatorial optimization problem. We solve this problem using a hybrid quantum annealing algorithm. Despite the limitations in size and speed of today's quantum computers, our algorithm provides quantifiable liquidity savings when applied to the Canadian HVPS using a 30-day sample of transaction data. By reordering batches of 70 payments, we achieve an average of Canadian (C) $240 million in daily liquidity savings, with a settlement delay of approximately 90 seconds. For a few days in the sample, the liquidity savings exceed C$1 billion. Compared with classical computing and with current algorithms in HVPS, our quantum algorithm offers larger liquidity savings, and it offers more reliable and consistent solutions, particularly under time constraints. This paper was accepted by Chung Piaw Teo, optimization. Supplemental Material: The data files are available at https://doi.org/10.1287/mnsc.2023.00314. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

8. Wind energy projects and species protection law: A comparative analysis of the application of EU law in five member states

Author

Akerboom, S., Backes, C.W., Bovet, Jana, Cavallin, Elissa, Cliquet, An, Kock, Wolfgang, mcGillivray, Donald, Mathews, Fiona, Schoukens, Hendrik, Tegner Anker, Helle, Parel Water en duurzaamheid / UCWOSL, Energy and Resources, Omgevingsrecht, Parel Water en duurzaamheid / UCWOSL, Energy and Resources, and Omgevingsrecht

Subjects
Geography, Planning and Development, Management, Monitoring, Policy and Law
Abstract

Wind farms and their associated transmission infrastructure can have negative impact on biodiversity. Offshore wind farms, for example, can pose threats to animals like harbor porpoises and migrating birds and onshore wind farms and transmission grids may harm birds and bats.In this article we analyse how European Union species protection law is transposed and applied to decision-making on wind energy projects in five member states, namely Denmark, Germany, the Netherlands, Belgium and the United Kingdom. The analysis aims to understands the differences in the interpretation and application of national species protection law, point out deficiencies, and make recommendations, partly based on learning from best practices. Though transposition in national law is almost identical, implementation practice in these states varies substantially. The question in raised whether the legal regime, as currently applied, can be improved to serve the aims of a considerable increase of renewable energy sources whilst simultaneously protecting biodiversity.

Published
2019

9. Wind energy projects and species protection law: A comparative analysis of the application of EU law in five member states

Author

Parel Water en duurzaamheid / UCWOSL, Energy and Resources, Omgevingsrecht, Akerboom, S., Backes, C.W., Bovet, Jana, Cavallin, Elissa, Cliquet, An, Kock, Wolfgang, mcGillivray, Donald, Mathews, Fiona, Schoukens, Hendrik, Tegner Anker, Helle, Parel Water en duurzaamheid / UCWOSL, Energy and Resources, Omgevingsrecht, Akerboom, S., Backes, C.W., Bovet, Jana, Cavallin, Elissa, Cliquet, An, Kock, Wolfgang, mcGillivray, Donald, Mathews, Fiona, Schoukens, Hendrik, and Tegner Anker, Helle

Published
2019

10. Wind energy projects and species protection law:A comparative analysis of the application of eu law in five member states

Author

Akerboom, Sanne, Anker, Helle Tegner, Backes, Chris, Bovet, Jana, Cavallin, Elissa, Cliquet, An, Köck, Wolfgang, Mathews, Fiona, McGillivray, Donald, Schoukens, Hendrik, Akerboom, Sanne, Anker, Helle Tegner, Backes, Chris, Bovet, Jana, Cavallin, Elissa, Cliquet, An, Köck, Wolfgang, Mathews, Fiona, McGillivray, Donald, and Schoukens, Hendrik

Abstract

Wind farms and their associated transmission infrastructure can have negative impact on biodiversity. Offshore wind farms, for example, can pose threats to animals like harbour porpoises and migrating birds and onshore wind farms and transmission grids may harm birds and bats. In this article we analyse how European Union species protection law is transposed and applied to decision-making on wind energy projects in five member states, namely Denmark, Germany, the Netherlands, Belgium and the United Kingdom. The analysis aims to understand the differences in the interpretation and application of national species protection law, point out deficiencies, and make recommendations, partly based on learning from best practices. Though transposition in national law is almost identical, implementation practice in these states varies substantially. The question is raised whether the legal regime, as currently applied, can be improved to serve the aims of a considerable increase of renewable energy sources whilst simultaneously protecting biodiversity.

Published
2019

12. Renewable energy projects and species protection. A comparison into the application of the EU species protection regulation with respect to renewable energy projects in the Netherlands, United Kingdom, Belgium, Denmark and Germany

Author

Auer, Julia, Bovet, Jana, Cavallin, Elissa, Cliquet, An, Holst, Eva-Charlotte, Köck, Wolfgang, McGillivray, Donald, Mathews, Fiona, Schoukens, Hendrik, Anker, Helle Tegner, Backes, Chris, and Akerboom, Sanne

Subjects
QL0081, K1, K3581
Abstract

Renewable energy projects, such as offshore and onshore wind and solar farms, including the necessary infrastructure, have an impact on biodiversity. Given the status of biodiversity across Europe, and the ambitions for the maintenance of species, limiting the impact of renewable energy generation units on biodiversity is of fundamental importance. This study offers an insight into the incorporation of species protection aspects in current permit practices, and contributes to the discussion on dealing with species protection issues in the process of upscaling sustainable energy facilities.

Published
2018

15. Trees

Author

Conaghan, Joanne, Cane, Peter, McGillivray, Donald, Conaghan, Joanne, Cane, Peter, and McGillivray, Donald

Published
2008

16. Nature Conservation

Author

Conaghan, Joanne, Cane, Peter, McGillivray, Donald, Conaghan, Joanne, Cane, Peter, and McGillivray, Donald

Published
2008

18. Taking Stock

Author

Holder, Jane, McGillivray, Donald, Holder, Jane, and McGillivray, Donald

Published
2007

20. 'Private Rights, Public Interests and the Environment

Author

Hayward, T., O'Neill, J., McGillivray, Donald, Wightman, John, Hayward, T., O'Neill, J., McGillivray, Donald, and Wightman, John

Abstract

This work considers questions about justice raised by environmental crises, the ramifications environmental conflicts have for the political theory of property and markets, and the implications of developments of environmental law.

Published
1997

22. Newer Drugs For Arthritis

Author

McGillivray, Donald C.

Subjects
Technical Section
Abstract

The major area of new drug discoveries for the treatment of arthritis is in non-steroidal anti-inflammatory agents (NSAIA). Unfortunately, as yet no new and safe drug of major significance has appeared. Aspirin still ranks high beside the newcomers. Indomethacin, ibuprofen, naproxen, fenoprofen and tolmetin are described and their roles in therapy are discussed. A further group of older drugs receiving new application in the treatment of arthritis is presented. These include penicillamine and the immunosuppressive drugs. Gold and chloroquin are also discussed to put these agents in their proper perspective.

Published
1977

Catalog

Books, media, physical & digital resources
See catalog results