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Faculty of Science: Recent submissions

  • On the cone of weighted graphs generated by triangles 
    del Valle, Coen; Dukes, Peter J.; Garaschuk, Kseniya (arXiv, 2019)
    Motivated by problems involving triangle-decompositions of graphs, we examine the facet structure of the cone τn of weighted graphs on n vertices generated by triangles. Our results include enumeration of facets for small ...
  • Leaves for packings with block size four 
    Chang, Yanxun; Dukes, Peter J.; Feng, Tao (arXiv, 2019)
    We consider maximum packings of edge-disjoint 4-cliques in the complete graph Kn. When n 1 or 4 (mod 12), these are simply block designs. In other congruence classes, there are necessarily uncovered edges; we examine the ...
  • Local balance in graph decompositions 
    Dukes, Peter J.; Bowditch, Flora Caroline (arXiv, 2020)
    In a balanced graph decomposition, every vertex of the host graph appears in the same number of blocks. We propose the use of colored loops as a framework for unifying various other types of local balance conditions in ...
  • A lower bound on HMOLS with equal-sized holes 
    Dukes, Peter J.; del Valle, Coen; Bailey, Michael (arXiv, 2020)
    It is known that N(n), the maximum number of mutually orthogonal latin squares of order n, satisfies the lower bound N(n) > n1/14.8 for large n. For h > 2, relatively little is known about the quantity N(hn), which denotes ...
  • Sequentially Perfect and Uniform One-Factorizations of the Complete Graph 
    Dinitz, Jeffrey H.; Dukes, Peter J.; Stinson, Douglas R. (The Electronic Journal of Combinatorics, 2005)
    In this paper, we consider a weakening of the de nitions of uniform and perfect one-factorizations of the complete graph. Basically, we want to order the 2n − 1 one-factors of a one-factorization of the complete graph ...
  • Bounds on the achromatic number of partial triple systems 
    Dukes, Peter J.; MacGillivray, Gary; Parton, Kristin (Contributions to Discrete Mathematics, 2007)
    A complete k-colouring of a hypergraph is an assignment of k colours to the points such that (1) there is no monochromatic hyperedge, and (2) identifying any two colours produces a monochromatic hyperedge. The achromatic ...
  • The utility of different acoustic indicators to describe biological sounds of a coral reef soundscape 
    Dimoff, Sean A.; Halliday, William D.; Pine, Matthew K.; Tietjen, Krista L.; Juanes, Francis; Baum, Julia K. (Ecological Indicators, 2021)
    Monitoring coral reefs is vital to the conservation of these at-risk ecosystems. While most current monitoring methods are costly and time-intensive, passive acoustic monitoring (PAM) could provide a cost-effective, large ...
  • Bernoulli wavelet method for numerical solution of anomalous infiltration and diffusion modeling by nonlinear fractional differential equations of variable order 
    Chouhan, Devendra; Mishra, Vinod; Srivastava, H.M. (Results in Applied Mathematics, 2021)
    In this paper, generalized fractional-order Bernoulli wavelet functions based on the Bernoulli wavelets are constructed to obtain the numerical solution of problems of anomalous infiltration and diffusion modeling by a ...
  • Diversity of electron transport chains in anaerobic protists 
    Gawryluk, Ryan M. R.; Stairs, Courtney W. (Biochimica et Biophysica Aca (BBA) - Bioenergetics, 2021)
    Eukaryotic microbes (protists) that occupy low-oxygen environments often have drastically different mitochondrial metabolism compared to their aerobic relatives. A common theme among many anaerobic protists is the serial ...
  • An efficient semi-analytical method for solving the generalized regularized long wave equations with a new fractional derivative operator 
    Srivastava, H.M.; Deniz, Sinan; Saad, Khaled M. (Journal of King Saud University - Science, 2021)
    In this work, the newly developed optimal perturbation iteration technique with Laplace transform is applied to the generalized regularized long wave equations with a new fractional operator to obtain new approximate ...
  • Pre-clinical investigation of STAT3 pathway in bladder cancer: Paving the way for clinical translation 
    Mirzaei, Sepideh; Gholami, Mohammad Hossein; Mahabady, Mahmood Khaksary; Nabavi, Noushin; Zabolian, Amirhossein; Banihashemi, Seyed Mohammad; Haddadi, Amirabbas; Entezari, Maliheh; Hushmandi, Kiavash; Makvandi, Pooyan; Samarghandian, Saeed; Zarrabi, Ali; Ashrafizadeh, Milad; Khan, Haroon (Biomedicine & Pharmacotherapy, 2021)
    Effective cancer therapy requires identification of signaling networks and investigating their potential role in proliferation and invasion of cancer cells. Among molecular pathways, signal transducer and activator of ...
  • Autophagy: From structure to metabolism to therapeutic regulation 
    Jardon, Mario A.; Rothe, Katharina; Bortnik, Svetlana; Vezenkov, Lubomir; Jiang, Xiaoyan; Young, Robert N.; Lum, Julian J.; Gorski, Sharon M. (Autophagy, 2013)
    Multidisciplinary approaches are increasingly being used to elucidate the role of autophagy in health and disease and to harness it for therapeutic purposes. The broad range of topics included in the program of the Vancouver ...
  • Demographic population cycles and ℛ0 in discretetime epidemic models 
    van den Driessche, P.; Yakubu, Abdul-Aziz (Journal of Biological Dynamics, 2018)
    We use a general autonomous discrete-time infectious disease model to extend the next generation matrix approach for calculating the basic reproduction number, R0, to account for populations with locally asymptotically ...
  • Thickly-resolvable block designs 
    Dukes, Peter J.; Ling, Alan C. H.; Malloch, Amanda (The Australasian Journal of Combinatorics, 2016)
    We show that the necessary divisibility conditions for the existence ofaσ-resolvable BIBD(v,k,λ) are sufficient for largev. The key idea isto form an auxiliary graph based on an [r,k]-configuration ...
  • Resolvable Group Divisible Designs with Large Groups 
    Dukes, Peter J.; Lamken, Esther R.; Ling, Alan C. H. (The Electronic Journal of Combinatorics, 2016)
    We prove that the necessary divisibility conditions are sufficient for the existence of resolvable group divisible designs with a fixed number of sufficiently large groups. Our method combines an application of the Rees ...
  • Incidence structures near configurations of type (n3) ∗ 
    Dukes, Peter J.; Iwasaki, Kaoruko (Ars Mathematica Contemporanea, 2020)
    An (n3) configuration is an incidence structure equivalent to a linear hypergraph on n vertices which is both 3-regular and 3-uniform. We investigate a variant in which one constraint, say 3-regularity, is present, and we ...
  • Insight into coral reef ecosystems: investigations into the application of acoustics to monitor coral reefs and how corallivorous fish respond to mass coral mortality. 
    Dimoff, Sean (2021-02-05)
    Coral reefs around the world are threatened by a variety of sources, from localized impacts, including overfishing and coastal development, to global temperature increases and ocean acidification. Conserving these marine ...
  • Integrated Solutions for the Water-Energy-Land Nexus: Are Global Models Rising to the Challenge? 
    Johnson, Nils; Burek, Peter; Byers, Edward; Falchetta, Giacomo; Flörke, Martina; Fujimori, Shinichiro; Havlik, Petr; Hejazi, Mohamad; Hunt, Julian; Krey, Volker; Langan, Simon; Nakicenovic, Nebojsa; Palazzo, Amanda; Popp, Alexander; Riahi, Keywan; van Dijk, Michiel; van Vliet, Michelle T. H.; van Vuuren, Detlef P.; Parkinson, Simon; et al. (Water, 2019)
    Increasing human demands for water, energy, food and materials, are expected to accentuate resource supply challenges over the coming decades. Experience suggests that long-term strategies for a single sector could yield ...
  • An intrinsic lipid-binding interface controls sphingosine kinase 1 function 
    Pulkoski-Gross, Michael J.; Jenkins, Meredith L.; Truman, Jean-Philip; Salama, Mohamed F.; Clarke, Christopher J.; Burke, John E.; Hannun, Yusuf A.; Obeid, Lina M. (Journal of Lipid Research, 2018)
    Sphingosine kinase 1 (SK1) is required for production of sphingosine-1-phosphate (S1P) and thereby regulates many cellular processes, including cellular growth, immune cell trafficking, and inflammation. To produce S1P, ...
  • Endo-fucoidan hydrolases from glycoside hydrolase family 107 (GH107) display structural and mechanistic similarities to α-l-fucosidases from GH29 
    Vickers, Chelsea; Liu, Feng; Abe, Kento; Salama-Alber, Orly; Jenkins, Meredith; Springate, Christopher M. K.; Burke, John E.; Withers, Stephen G.; Boraston, Alisdair B. (Journal of Biological Chemistry, 2018)
    Fucoidans are chemically complex and highly heterogeneous sulfated marine fucans from brown macro algae. Possessing a variety of physicochemical and biological activities, fucoidans are used as gelling and thickening agents ...

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