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  • Creator(s):
    Marc Muller, Jaynise Perez-Valentin
    Description:

    This dataset accompanies the Manuscript “Impact of Hurricane Maria on beach erosion in Puerto Rico: remote sensing and causal inference” by Jaynise Perez-Valentin and Marc F. Muller, November 2019.

    beachesGIS is a zip archive that contains GIS vectors of 75 beach polygons across Puerto Rico. The vectors are provided in ESRI Shapefile format and LatLong coordinate system and have an attribute table with a beach name.

    TimeSeries is a csv table containing time series of shoreline pos…

    Date Created:
    2019-11-06
  • Creator(s):
    Dan Bates, David Eklund, Jonathan Hauenstein, Chris Peterson
    Description:

    A fundamental problem in algebraic geometry is to decompose the solution set of a given polynomial system. A numerical description of this solution set is called a numerical irreducible decomposition and currently all standard algorithms use a sequence of homotopies forming a dimension-by-dimension approach. In this article, we pair a classical result to compute a smooth point on every irreducible component in every dimension using a single homotopy together with the theory of isosingular s…

    Date Created:
    2019-04-26
  • Creator(s):
    David H Richter, Anne E Dempsey
    Description:

    Data for the reproduction of figures found in the paper Turbulent transport of spray droplets in the vicinity of moving surface waves written by David Richter et al.

    Included in this data set is: Spray Droplet Concentration, normalized velocity, and surf. Joint probability distributions of the droplet ejection location with (a) the droplet death location, (b) the maximum height reached by the droplet during its lifetime, and © the droplet lifetime for Cases d10 and d100.

    Date Created:
    2019-03-29
  • Creator(s):
    Kenneth Christensen, Nathaniel R. Bristow
    Date Created:
    2019-03-19
  • Creator(s):
    Jonathan Hauenstein, Jose Rodriguez
    Description:

    In the field of numerical algebraic geometry, positive-dimensional solution sets of systems of polynomial equations are described by witness sets. In this paper, we define multiprojective witness sets which encode the multidegree information of an irreducible multiprojective variety. Our main results generalize the regeneration solving procedure, a trace test, and numerical irreducible decomposition to the multiprojective case. Examples are included to demonstrate this new approach.

    Date Created:
    2018-12-29
  • Creator(s):
    Jonathan Hauenstein, Alan Liddell, Yi Zhang
    Description:

    Standard interior point methods in semidefinite programming track a solution path for a homotopy defined by a system of polynomial equations. By viewing this in the context of numerical algebraic geometry, we are able to employ techniques to handle various cases which can arise. Adaptive precision path tracking techniques can help navigate around ill-conditioned areas. When the optimizer is singular with respect to the first-order optimality conditions, endgames can be used to efficiently and…

    Date Created:
    2018-04-10
  • Creator(s):
    Jonathan Hauenstein
    Description:

    A common problem when analyzing models, such as a mathematical modeling of a biological process, is to determine if the unknown parameters of the model can be determined from given input-output data. Identifiable models are models such that the unknown parameters can be determined to have a finite number of values given input-output data. The total number of such values over the complex numbers is called the identifiability degree of the model. Unidentifiable models are models such that th…

    Date Created:
    2018-03-09
  • Creator(s):
    Samantha Sherman, Jonathan Hauenstein
    Description:

    Computational tools in numerical algebraic geometry can be used to numerically approximate solutions to a system of polynomial equations. If the system is well-constrained (i.e., square), Newton’s method is locally quadratically convergent near each nonsingular solution. In such cases, Smale’s alpha theory can be used to certify that a given point is in the quadratic convergence basin of some solution. This was extended to certifiably determine the reality of the corresponding sol…

    Date Created:
    2018-03-08
  • Creator(s):
    Edward Beatty
    Description:

    The Mexican patent database collects data on all patents issued in Mexico from roughly 1840 to the onset of the Mexican Revolution in 1911, totaling approximately thirteen thousand five hundred (13,500) discrete patent records. At present, this is the most comprehensive record of patents issued by Mexican governments during the nineteenth century. There is no single archival or published source that contains a comprehensive list or data on Mexican patents issued over the course of the long …

    Date Created:
    2018-01-29
  • Creator(s):
    Sunny Boyd
    Description:

    Mate choice strategies in a spatially-explicit model environment

    Giordano B. S. Ferreira1, Matthias Scheutz1, and Sunny K. Boyd2 1Department of Computer Science, Tufts University, Medford, MA 02155, USA Matthias.scheutz@tufts.edu and Giordano.Ferreira@tufts.edu 2Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA Boyd.1@nd.edu (Corresponding author; phone: 574-631-5021; fax: 574-631-7413)

    Keywords: mate choice, decision-making, agent-based modeling, f…

    Date Created:
    2017-12-14
  • Creator(s):
    Eitan Tzelgov, Daniel Pemstein, Adam Glynn, Svend-Erik Skaaning, Jeffrey Staton, Allen Hicken, Michael Bernhard, John Gerring, Jan Teorell, Michael Coppedge, Kelly McMann, Megan Reif, Carl Henrik Knutsen, Yi-ting Wang, David Altman, Staffan I. Lindberg, Matthew Kroenig, M. Steven Fish
    Description:

    Data for Varieties of Democracy Project. Version 7 of these files. There is also a collection of posterior files for v.7.

    Date Created:
    2017
  • Creator(s):
    Jennifer Tank
    Description:

    This dataset contains data from 17 stream 15N-NH4 tracer addition experiments conducted globally, with data partitioned by autotrophic uptake compartments (i.e., epilithic biofilm, filamentous algae, bryophytes/macrophytes) and heterotrophic uptake compartments (i.e., leaves, small wood, and fine particles) that comprise the base of stream food webs. The dataset includes compartmental data on N biomass and uptake as well as other physiochemical variable that describe conditions in each stream.

    Date Created:
    2017-09-12