Rana Parshad, Zhijun Wu and I organize a weekly **Mathematical Biology Seminar** at Iowa State University.

Seminars take place almost every** Friday at 3:20pm in Carver 401**. In addition, we have a **zoom link** for people working from home (if you are interested just email me).

**Future speakers:**

September 22, 2023**Vaibhava Srivastava**, Iowa State University (Mathematics)*Dynamical Analysis of a Lotka-Volterra Competition Model with both Allee and Fear Effect*

Population ecology theory is replete with density-dependent processes. However trait-mediated or behavioral indirect interactions can both reinforce or oppose density-dependent effects. This paper presents the first two species competitive ODE and PDE systems where an Allee effect, which is a density dependent process and the fear effect, which is non-consumptive and behavioral are both present. The stability of the equilibria is discussed analytically using the qualitative theory of ordinary differential equations. It is found that the Allee effect and the fear effect change the extinction dynamics of the system and the number of positive equilibrium points, but they do not affect the stability of the positive equilibria. We also observe some special dynamics that induce bifurcations in the system by varying the Allee or fear parameter. Interestingly we find that the Allee effect working in conjunction with the fear effect, can bring about several qualitative changes to the dynamical behavior of the system with only the fear effect in place, in regimes of small fear. That is, for small amounts of the fear parameter, it can change a competitive exclusion type situation to a strong competition type situation. It can also change a weak competition type situation to a bi-stability type situation. However for large fear regimes the Allee effect reinforces the dynamics driven by the fear effect. The analysis of the corresponding spatially explicit model is also presented. To this end the comparison principle for parabolic PDE is used. The conclusions of this paper have strong implications for conservation biology, biological control as well as the preservation of biodiversity.

September 29, 2023**No seminar**, due to the Statistics 75th Anniversary Research Conference*https://www.stat.iastate.edu/event/2023/75th-anniversary-research-confe…*

October 13, 2023**Tracy Stepien**, University of Florida

Title TBA

October 27, 2023**Urvashi Verma**, Iowa State University (Mathematics)

Title TBA

November 03, 2023**Maggie Lewis**, Ohio State University

Title TBA**Past speakers:**

September 15, 2023**Xinglin Jia**, Iowa State University (Mathematics / BCB)*Concise functional enrichment of ranked gene lists*

September 08, 2023**Thomas Griffin**, Iowa State University (Mathematics)*Understanding the chemostat and reversing competitive exclusion*

April 28, 2023**Rana Parshad**, Iowa State University (Mathematics)*Some recent results on three species food chains*

April 25, 2023**Reinhard Laubenbacher**, University of Florida*Structure and dynamics of Boolean networks, with applications to the concept of modularity in biology*

April 21, 2023**Debosmita Kundu**, Iowa State University (Statistics)*Identifying Peaks and Estimating Parameters for CUT&RUN Sequencing Using Branching Process Model*

April 07, 2023**Zhijun Wu**, Iowa State University (Mathematics)*Beyond six feet: The collective behavior of social distancing*

April 03, 2023**Pierre-Emmanuel Jabin**, Penn State University*The mean-field limit of non-exchangeable integrate and fire systems*

March 31, 2023**Vaibhava Srivastava**, Iowa State University (Mathematics)*The effect of "fear" on two species competition*

March 28, 2023**David Murrugarra**, University of Kentucky*Phenotype Control Methods for Regulatory Networks*

March 24, 2023**Yanyang Wang**, University of Iowa*Mathematical analysis and models for understanding neural dynamics*

March 03, 2023**Mondal Hasan Zahid**, University of Florida*The biting rate of Aedes aegypti and its variability: A systematic review (1970 - 2022)*

February 20, 2023**Anthony DeLegge**, Benedictine University*The Effects of Vaccine Misinformation on Disease Spread*

February 17, 2023**Ananth Srinivas**, Louisiana State University*Optimal Control Studies for Additional food provided Prey-Predator Systems involving Holling Type III and Type IV Functional Responses*

February 10, 2023**Claus Kadelka**, Iowa State University (Mathematics)*Heterogeneities in contact patterns matter: how to account for them *

January 27, 2023**Md Shahriar Mahmud**, Iowa State University (Mathematics)*Dynamics of a diffusive vaccination model with therapeutic impact and non-linear incidence rates*

January 20, 2023**Albin Salazar**, Ecole Normale Superieure, Paris*A generic framework to coarse-grain stochastic reaction networks by Abstract Interpretation*

November 11, 2022**Parnal Joshi**, Iowa State University (Veterinary Medicine)*Identifying protein function annotation differences between mouse and human orthologous proteins*

October 14, 2022**Aniket Banerjee**, Iowa State University (Mathematics)*The effect of a few very fast diffusers in two species competition*

September 30, 2022**Jordan Rozum**, State University of New York at Binghamton*Stable motifs in Boolean networks and beyond*

May 04, 2022**Lihong Zhao**, University of California Merced*Modeling and Global Sensitivity Analysis of Strategies to Mitigate Covid-19 Transmission on a Structured College Campus*

April 27, 2022**Daniel Abrams**, Northwestern University*Careful or colorful? The evolution of animal ornaments*

April 13, 2022**Hayriye Gulbudak**, University of Louisiana at Lafayette*Heterogeneous viral strategies promote coexistence in virus-microbe systems*

April 06, 2022**Hana Dobrovolny**, Texas Christian University*Insights into viral coinfections from mathematical models*

March 30, 2022**Glenn Ledder**, University of Nebraska-Lincoln*A Competition Model with Seasonal Reproduction*

March 23, 2022**Cinzia Soresina**, University of Graz, Austria*Multistability and time-periodic spatial patterns in the cross-diffusion SKT model*

March 02, 2022**Lubna Pinky**, Eastern Virginia Medical School*Within-host kinetics of parainfluenza virus infection*

February 23, 2022**Md Rafiul Islam**, Iowa State University (Mathematics)*Taking ethnicity into consideration can lead to a more successful roll-out of limited vaccine: a COVID-19 model-based study*

February 16, 2022**Goong Chen**, Texas A&M*Modes of Motion of a Coronavirus*

February 09, 2022**Tang Quoc Bao**, University of Graz, Austria*Global well-posedness of reaction-diffusion systems*

February 03, 2022**Md Masud Rana**, University of Kentucky*Reduced-Order Modeling in Analyzing the Dynamics of a Spatial Stoichiometric Aquatic Ecosystem*

December 08, 2021**Adam Runions**, University of Calgary*Modeling Leaf Shape Development & Diversity*

December 01, 2021**Anayse Miller**, Iowa State University (Mathematics)*Age-Structured Population Models of Tissue Organization*

November 17, 2021**Andre Voigt**, Norwegian University of Science and Technology*Modelling strategies for reducing the spread of COVID-19*

November 03, 2021**Santosh Manicka**, Tufts University*Biological regulatory networks are less nonlinear than expected*

October 27, 2021**Adrian Lam**, Ohio State University*Competition dynamics of phytoplankton species in eutrophic water columns*

October 20, 2021**Julie Spencer**, Los Alamos National Laboratory*Distinguishing Viruses Responsible for Influenza-like Illness*

October 13, 2021**Zhijun Wu**, Iowa State University (Mathematics)*Social Distancing Is a Social Dilemma Game Played by Every Individual against his/her Population*

October 06, 2021**Daniel Plaugher**, University of Kentucky*Modeling the Pancreatic Cancer Microenvironment in Search of Control Targets*

September 29, 2021**Rana Parshad**, Iowa State University (Mathematics)*Some Recent Results in Two Species Competition*

September 15, 2021**Kristina Moen**, Iowa State University (Mathematics)*Tracking the Molecular Evolution of SARS-CoV-2: A Topological Approach*

September 08, 2021**Aniket Banerjee**, Iowa State University (Mathematics)*Exploring the Dynamics of Virulent and Avirulent Aphids: A Case for a "Within Plant" Refuge*

September 01, 2021**Claus Kadelka**, Iowa State University (Mathematics)*Evaluation of the United States COVID-19 vaccine allocation strategy*

April 28, 2021**Ivana Bozic**, University of Washington*MathematicalÂ model of colorectal cancer initiation*

April 21, 2021**Nancy Rodriguez**, UC Boulder*The effect of directed movement on the Allee Effect*

April 14, 2021**Adam Maclean**, University of Southern California*Modeling gene regulatory network dynamics at single-cell resolution*

April 07, 2021**Moumita Das**, Rochester Institute of Technology*Mechanics and fracture properties of articular cartilage and cartilage-inspired soft materials*

March 31, 2021**Veronica Grieneisen**, Cardiff University*MathematicalÂ modelling of Morphogenesis in Plants and Animals, from cells to tissues*

March 24, 2021**Andrew Krause**, Oxford University*Recent Progress & Open Frontiers in Turing-Type Morphogenesis*

March 17, 2021**Madhavan Rajagopal Padmanabhan**, Iowa State University (Computer Science)*Applications of Submodular Optimization inÂ Information Diffusion*

March 10, 2021**Daniel Cruz**, Georgia Tech*Agent-based Modeling of Emergent Patterns Within Stem Cell Colonies*

March 03, 2021**Elena Dimitrova**, Cal Poly*Algebraic design of experiments for network identification*

February 24, 2021**Audrey McCombs**, Iowa State University (Statistics)*Structure Matters: Network topology and disease dynamics*

February 17, 2021**David Murrugarra**, University of Kentucky*Improving RNA secondary structure prediction via state inference with machine learning and deep learning methods*

February 10, 2021**Anastasios Matzavinos**, Brown University*Bayesian uncertainty quantification for particle-based simulations*

November 18, 2020**Lauren Childs**, Virginia Tech*Modeling Malaria Dynamics within the Mosquito*

November 11, 2020**Fusun Akman**, Illinois State University*Symmetries of nested canalizing functions and of phase spaces of gene regulatory networks*

November 04, 2020**Thomas Woolley**, Cardiff University*Patterns, cellular movement and brain tumours*

October 28, 2020**Samantha Erwin**, Oak Ridge National Laboratory*Monitoring and Forecasting COVID-19 Disease Progression*

October 21, 2020**Ruoyu Wu**, Iowa State University (Mathematics)*Mean field interaction on random graphs: Erdos-Renyi and multi-color graphs*

October 14, 2020**T.M. Murali**, Virginia Tech*How to build regulatory networks from single-cell gene expression data*

October 07, 2020**Md Rafiul Islam**, Iowa State University (Mathematics)*Mathematical modeling of infectious diseases using ordinary and fractional differential equations*

September 30, 2020**Laura Strube**, Virginia Tech*The role of repeat infection in the dynamics of a simple model of waning and boosting immunity*

September 23, 2020**Manoj SrinivasanÂ **, Ohio State University*Theories of human locomotion: How healthy humans walk stably and efficiently*

September 16, 2020**Eric Takyi**, Iowa State University (Mathematics)*Diffusion induced extinction and recovery in a Female Harvesting Male Stocking (FHMS) model with weak Allee effects*

September 09, 2020**Davit Potoyan**, Iowa State University (Chemistry)*Multi-scale modeling of nuclear organization and regulation*

September 02, 2020**Zhijun Wu**, Iowa State University (Mathematics)*Social Distancing amid Social LivingÂ *

May 06, 2020**Leonid Rubchinsky**, Indiana University Purdue University Indianapolis*In and Out of Synch: Intermittent Synchronization of Living Systems*

April 29, 2020**Claus Kadelka**, Iowa State University (Mathematics)*A model-based evaluation of the efficacy of COVID-19 social distancing testing and hospital triage policies*

April 08, 2020**Ivair Valmorbida**, Iowa State University (Entomology)*Soybean aphid (Hemiptera: Aphididae) response to lambda-cyhalothrin varies with its virulence status to aphid-resistant soybean*

April 01, 2020**Matthew ONeal**, Iowa State University (Entomology)*Soybean aphids - an invasive pest that changed soybean production in the US.*

March 11, 2020**Zhijun Wu**, Iowa State University (Mathematics)*Why Multilingual, and How to Keep It -- An Evolutionary Dynamics Perspective*

March 04, 2020**Amy Toth**, Iowa State University (EEOB and Entomology)*Building a super organism: Social insects as models for studying the evolution of biological complexity*

February 26, 2020**Eric Takyi**, Iowa State University (Mathematics)*On large and small data blow-up solutions in the Classical Trojan Y-Chromosome Model*

February 19, 2020**Shofi Andari**, Iowa State University (Statistics)*Paired-end reads merging using pair-hidden Markov model*

February 12, 2020**Rana Parshad**, Iowa State University (Mathematics)*Indirect Effects of Invasive Species*

February 05, 2020**Claus Kadelka**, Iowa State University (Mathematics)*Understanding the Rules of Life: Design Principles of Gene Regulatory Networks*

January 29, 2020**Kushani da Silva**, Iowa State University (Mathematics)*The higher status language doesn't always win: The fall of English in India and the rise of Hindi*

January 22, 2020**Audrey McCombs**, Iowa State University (Statistics)*Community stability of ecological networks*

December 11, 2019**Oyeyemi Oyebola**, Iowa State University (Mathematics)*Extra Polyloops and their Applications to Biological Inheritance*

December 04, 2019**Karin Dorman**, Iowa State University (Statistics)*Denoising Illumina Amplicon Data*

November 06, 2019**Bob Jernigan**, Iowa State University (Biochemistry, Biophysics and Molecular Biology)*Looking for complexity - when pairs are not enough*

October 30, 2019**Tom Sappington**, USDA*"It's not easy to be me¦": Bridging the worlds of applied ecologists and modelers to change the world of pest management*

October 23, 2019**Ian Braun**, Iowa State University (GDCB)*Automated methods enable direct computation on phenotypic descriptions for novel candidate gene prediction*

October 16, 2019**Haldre Rogers**, Iowa State University (EEOB)*What is the fate of an empty forest?*

October 09, 2019**Zhijun Wu**, Iowa State University (Mathematics)*When Do Cheaters Lose?*

September 25, 2019**Kushani da Silva**, Iowa State University (Mathematics)*Dynamics of Endangered Languages of the World*

September 18, 2019**Eric Takyi**, Iowa State University (Mathematics)*The Trojan Y Chromosome strategy*