Now showing items 1-20 of 462

    • Graphical analysis of evolutionary trade-off in sylvatic Trypanosoma cruzi transmission modes 

      Kribs, Christopher M. (ElsevierDepartment of Mathematics, University of Texas at Arlington, 2014-07)
      The notion of evolutionary trade-off (one attribute increasing at the expense of another) is central to the evolution of traits, well-studied especially in life-history theory, where a framework first developed by Levins ...
    • Host switching vs. host sharing in overlapping sylvatic Trypanosoma cruzi transmission cycles 

      Kribs, Christopher M.; Mitchell, Christopher (Taylor & Francis OpenDepartment of Mathematics, University of Texas at Arlington, 2015-09)
      The principle of competitive exclusion is well established for multiple populations competing for the same resource, and simple models for multistrain infection exhibit it as well when cross-immunity precludes coinfections. ...
    • Agent-based mathematical modeling as a tool for estimating T. cruzi vector-host contact rates 

      Kribs, Christopher M.; Young, Kamuela E.; Mubayi, Anuj (ElsevierDepartment of Mathematics, University of Texas at Arlington, 2015-11)
      The parasite Trypanosoma cruzi, spread by triatomine vectors, affects over 100 mammalian species throughout the Americas, including humans, in whom it causes Chagas’ disease. In the U.S., only a few autochthonous cases ...
    • A metapopulation model for sylvatic T. cruzi transmission with vector migration 

      Kribs, Christopher; Crawford, Britnee (American Institute of Mathematical ScienceDepartment of Mathematics, University of Texas at Arlington, 2014-06)
      This study presents a metapopulation model for the sylvatic transmission of Trypanosoma cruzi, the etiological agent of Chagas' disease, across multiple geographical regions and multiple overlapping host-vector ...
    • Modeling colony collapse disorder in honeybees as a contagion 

      Kribs, Christopher; Mitchell, Christopher (American Institute of Mathematical SciencesDepartment of Mathematics, University of Texas at Arlington, 2014-12)
      Honeybee pollination accounts annually for over $14 billion in United States agriculture alone. Within the past decade there has been a mysterious mass die-off of honeybees, an estimated 10 million beehives and sometimes ...
    • Influence of vectors' risk-spreading strategies and environmental stochasticity on the epidemiology and evolution of vector-borne diseaes: the example of Chagas' disease 

      Kribs, Christopher; Pelosse, Perrine; Ginoux, Marine; Rabinovich, Jorge E.; Gourbiere, Sebastien; Menu, Frederic (Public Library of ScienceDepartment of Mathematics, University of Texas at Arlington, 2013)
      Insects are known to display strategies that spread the risk of encountering unfavorable conditions, thereby decreasing the extinction probability of genetic lineages in unpredictable environments. To what extent these ...
    • The convergence of difference boxes 

      Kribs, Christopher; Behn, Antonio; Ponomarenko, Vadim (Mathematical Association of AmericaDepartment of Mathematics, University of Texas at Arlington, 2005)
      We consider an elementary mathematical puzzle known as a "difference box" in terms of a discrete map from R⁴ to R⁴ or , canonically, from a subset of the first R² into itself. We identify the map's unique canonical fixed ...
    • SENDing MORE MONEY in any base 

      Kribs, Christopher (Mathematical Association of AmericaDepartment of Mathematics, University of Texas at Arlington, 2006)
      One of the most significant conceptual jumps involved in algebra is the use of letters (and other symbols) to represent numbers. One way to get students used to this notion is via puzzles. This paper describes a ...
    • Modeling nosocomial transmission of rotavirus in pediatric wards 

      Kribs, Christopher; Jusot, Jean-Francois; Vanhems, Philippe; Charles, Sandrine (Springer-VerlagDepartment of Mathematics and Curriculum & Instruction, University of Texas at Arlington, 2011)
      Nosocomial transmission of viral and bacterial infections is a major problem worldwide, affecting millions of patients (and causing hundreds of thousands of deaths) per year. Rotavirus infections affect most children ...
    • Vector consumption and contact process saturation in sylvatic transmission of T. cruzi 

      Kribs, Christopher (Taylor & FrancisDepartment of Mathematics, University of Texas at Arlington; Universidad de Colima, Mexico, 2006)
      Recent research in the transmission of the protozoan parasite Trypanosoma cruzi, some strains of which cause Chagas’ disease, suggests that consumption of vectors by sylvatic hosts such as raccoons may play a role in ...
    • Am I too fat? Bulimia as an epidemic 

      Kribs, Christopher; Gonzalez, Beverly; Huerta-Sanchez, Emilia; Ortiz-Nieves, Angela; Vazquez-Alvarez, Terannie (ElsevierDepartment of Mathematics, University of Texas at Arlington, 2003)
      For at least the past ten years, eating disorders have had a major impact in the physical and mental health of women, particularly young women. Anorexia and bulimia nervosa are closely linked eating disorders. Anorexia ...
    • A simple vaccination model with multiple endemic states 

      Kribs, Christopher; Velasco-Hernandez, Jorge X. (ElsevierDepartment of Mathematics, University of Texas at Arlington, 2000)
      A simple two-dimensional SIS model with vaccination exhibits a backward bifurcation for some parameter values. A two-population version of the model leads to the consideration of vaccination policies in paired border towns. ...
    • Vaccination strategies and backward bifurcation in age-since-infection structured model 

      Kribs, Christopher; Martcheva, Maia (ElsevierDepartment of Mathematics, University of Texas at Arlington, 2002)
      We consider models for a disease with acute and chronic infective stages, and variable infectivity and recovery rates, within the context of a vaccination campaign. Models for SIRS and SIS disease cycles exhibit backward ...
    • Effects of education, vaccination and treatment on HIV transmission in homosexuals with genetic heterogeneity 

      Kribs, Christopher; Del Valle, Sara; Morales Evangelista, Arlene; Velasco, Maria Cristina; Hsu Schmitz, Shu-Fang (Department of Mathematics, University of Texas at Arlington, 2004)
      Genetic studies report the existence of a mutant allele Δ32 of CC R5 chemokine receptor gene at high allele frequencies ( 10%) in Caucasian populations. The presence of the allele is believed to provide partial or full ...
    • Evaluating treatment of Hepatitis C for hemolytic anemia management 

      Kribs, Christopher; DebRoy, Swati; Mubayi, Anuj; Cardona-Melendez, Gloriell M.; Medina-Rios, Liana; Kang, MinJun; Diaz, Edgar (ElsevierDepartment of Mathematics, University of Texas at Arlington, 2010)
      The combination therapy of antiviral peg-interferon and ribavirin has evolved as one of the better treatments for Hepatitis-C. In spite of its success in controlling Hepatitis-C infection, it has also been associated with ...
    • Transmission dynamics and underreporting of Kala-azar in the Indian State of Bihar 

      Kribs, Christopher; Mubayi, Anuj; Castillo-Chavez, Carlos; Chowell, Gerardo; Ali Siddiqui, Niyamat; Kumar, Narendra; Das, Pradeep (Department of Mathematics, University of Texas at Arlington, 2010)
      "Kala-azar" (or Indian Visceral Leishmaniasis) is a vector-borne infectious dis- ease affecting communities in tropical and subtropical areas of the world. Bihar, a state in India, has one of the highest prevalence and ...
    • The role of the ratio of vector and host densities in the evolution of transmission modes in vector-borne diseases. The example of sylvatic Trypanosoma cruzi 

      Kribs, Christopher; Pelosse, Perrine (Department of Mathematics, University of Texas at Arlington, 2012)
      Pathogens may use different routes of transmission to maximize their spread among host populations. Theoretical and empirical work conducted on directly-transmitted diseases suggest that horizontal (i.e., through host ...
    • Comparative Analysis Of Various Continuous-time Deterministic Models Of Tumor-immune Interactions 

      Childress, Robert Paul
      Cancer is historically a leading cause of death in the United States. In 2013,cancer was the second leading cause of death with 584,881 deaths \cite{CDC}.Having solely been responsible for 22.5\% of all deaths in 2013 ...
    • Numerical Methods For Spontaneous And Evoked Glutamate Release 

      Blackwell, Justin Shane
      As synapses are responsible for the majority of neuron communications in the brain, the events of evoked and spontaneous synaptic vesicle release/fusion are key features of all synaptic current. These release events typically ...