Checking in With the Scientist–Practitioner Model: How Are We Doing? (2009)
Daniel Beal, Kevin Murphy, Howard Weiss
The science and practice of industrial-organizational psychology is being influenced by a number of factors. For example, within academics, we see an increase in the number of faculty members taking...
C ∞ genericity of positive topological entropy for geodesic flows (2009)
We show that there is a C ∞ open and dense set of positively curved metrics on S 2 whose geodesic flow has positive topological entropy, and thus exhibits chaotic behavior. The geodesic flow for...
Schelling's Segregation Model: Parameters, scaling, and aggregation (2009)
Abhinav Singh, Dmitri Vainchtein, Howard Weiss
Thomas Schelling proposed a simple spatial model to illustrate how, even with relatively mild assumptions on each individual's nearest neighbor preferences, an integrated city would likely...
How Terminal Is Terminal Velocity? (2008)
A. J. Lee, Linear Regression Analysis, John Wiley, New York, Lyle N. Long, ...
Since Vu−{x} ⊥ x − ¯xu−{x}, V(H) ⊂ R p−1 ×{0}, and we can consider the points V(u − {x}) as lying in R p−1. By (2), the (p − 1) × (p − 1) submatrix [BV(u−{x})]1≤i,...
General Mechanisms for Inverted Biomass Pyramids in Ecosystems (2008)
Wang, Hao, Morrison, Wendy, Singh, Abhinav, Weiss, Howard
Although the existence of robust inverted biomass pyramids seem paradoxical, they have been observed in planktonic communities, and more recently, in pristine coral reefs. Understanding the...
Fish Biomass Structure at Pristine Coral Reefs and Degradation by Fishing (2008)
Singh, Abhinav, Wang, Hao, Morrison, Wendy, Weiss, Howard
Coral reefs around the world have experienced a dramatic decline during the past 25 years. Overfishing is believed to play a major role. There is significant interest in stabilizing and restoring...
CHAOTIC ATTRACTORS AND PHYSICAL MEASURES FOR SOME DENSITY-DEPENDENT LESLIE POPULATION MODELS (2008)
Abstract. Following ecologists discoveries, mathematicians have begun studying extensions of the ubiquitous age structured Leslie population model to allow some survival probabilities and/or...
Dedicated to Jorge Sotomayor on the occasion of his sixtieth birthday. In this note we explore how simple tools from differential geometry can be used to analyze the behavior of some solutions curves...
C ∞ genericity of positive topological entropy for geodesic flows (2008)
We show that there is a C ∞ open and dense set of positively curved metrics on S 2 whose geodesic flow has positive topological entropy, and thus exhibits chaotic behavior. The geodesic flow for...
Topological dynamics of the Weil-Petersson geodesic flow (2007)
Pollicott, Mark, Weiss, Howard, Wolpert, Scott A.
We prove topological transitivity for the Weil Petersson geodesic flow for two-dimensional moduli spaces of hyperbolic structures. Our proof follows a new approach that exploits the density of...
Schelling's Segregation Model: Parameters, Scaling, and Aggregation (2007)
Singh, Abhinav, Vainchtein, Dmitri, Weiss, Howard
Thomas Schelling proposed an influential simple spatial model to illustrate how, even with relatively mild assumptions on each individual's nearest neighbor preferences, an integrated city would...
Stefan Gerhold, Carsten Schneider, Lev Glebsky, Lomas A, Slp México, Howard Weiss, ...
The Schelling segregation models are “agent based ” population models, where individual members of the population (agents) interact directly with other agents and move in space and time. In this...
Interplanetary Internet (IPN) : the next frontier in mobility. (2006)
Hooke, Adrian J., Cerf, Vint, Durst, Robert, Burleigh, Scott, Rumeau, Robert, Scott, Keith, ...
NASA/JPL
Free Energy as a Geometric Invariant (2005)
The free energy plays a fundamental role in statistical and condensed matter physics. A related notion of free energy plays an important role in the study of hyperbolic dynamical systems. In this...
Abstract: Classical lattice spin systems provide an important and illuminating family of models in statistical physics. An interaction � on a lattice L ⊂ Zd determines a lattice spin system with...
C∞ Genericity of Positive Topological Entropy for Geodesic Flows on S2 (2002)
Knieper, Gerhard, Weiss, Howard
We show that there is a C∞ open and dense set of positively curved metrics on S2 whose geodesic flow has positive topological entropy, and thus exhibits chaotic behavior. The geodesic flow for each...
In this paper we analyze a variant of the famous Schelling segregation model in economics as a dynamical system. This model exhibits, what appears to be, a new clustering mechanism. In particular, we...
Abstract. For any ε> 0, we construct an explicit smooth Riemannian metric on the sphere S n, n ≥ 3, that is within ε of the round metric and has a geodesic for which the corresponding orbit of...
Abstract: We extend some of the theory of multifractal analysis for conformal expanding systems to two new cases: The non-uniformly hyperbolic example of the Manneville– Pomeau equation and the...
The Velocity Dependence of Aerodynamic Drag: A Primer for Mathematicians (1999)
text or calculus text, you are likely to find a short section, or at least a problem, on the motion of a body subject to some type of drag force along with a calculation of the body's terminal...
Functions of Group Goals: Possible Generalizations from Individuals to Groups. (1998)
Ilfen, Daniel R., Shairo, Jillian, Salas, Eduardo, Weiss, Howard
Performance goals frequently facilitate the performance of individuals. There is also some evidence that goals have beneficial effects on groups or teams. However, much less is known about the latter...
Department of Defense Mail Guard for High Robustness Environments (1998)
Gilmore, Linda M., Mayer, Barbara, Montequin, Rita, Rogers, Kristina, Weiss, Howard
This Protection Profile (PP) specifies the information security requirements for DoD Mail Guards for High Robustness Environments. The Mail Guard specified in this PP sits between two protected...
The Lyapunov Spectrum for Conformal Expanding Maps and Axiom-A Surface Diffeomorphisms (1998)
We provide a detailed description of the decomposition of a conformal repeller by the level sets of the Lyapunov exponent, along with a similar result for Axiom-A surface diffeomorphisms. KEY WORDS:...
Spheres With Positive Curvature And Nearly Dense Orbits For The Geodesic Flow. (1998)
. For any " ? 0, we construct an explicit smooth Riemannian metric on the sphere S n ; n 3, that is within " of the round metric and has a geodesic for which the corresponding orbit of the...
. We establish the complete multifractal formalism for Gibbs measures for conformal expanding maps and Markov Moran geometric constructions. Examples include Markov maps of an interval, hyperbolic...
A Geometric Criterion For Positive Topological Entropy (1997)
. We prove that a diffeomorphism possessing a homoclinic point with a topological crossing (possibly with infinite order contact) has positive topological entropy, along with an analogous statement...
Key words and phrases. Hausdorff dimension, box dimension, Cantor-like set, geometric construction, random geometric construction, gauge function, Eckmann-Ruelle Conjecture.
The Lyapunov and Dimension Spectra of Equilibrium Measures for Conformal Expanding Maps (1996)
. In this note, we find an explicit relationship between the dimension spectrum for equilibrium measures and the Lyapunov spectrum for conformal repellers. We explicitly compute the Lyapunov spectrum...
. We prove the existence of an open and dense subset of maps f 2 Diff 1 ! (S 2 ) which have positive topological entropy. It follows that these maps have infinitely many hyperbolic periodic points...
In this paper we unify and extend many of the known results on the dimensions of deterministic and random Cantor-like sets in R n using their symbolic representation. We also construct several new...
. In this paper we unify and extend many of the known results on the dimensions of deterministic and random Cantor-like sets in R n using their symbolic representation. We also construct several new...
The geometry of measured geodesic laminations and the earthquake flow on Teichmüller space / (1986)
Thesis (Ph. D.)--University of Maryland, College Park, 1986.
Affective Reactions to the Thought of “God”: Moderating Effects of Image of God
Katherine Wiegand, Howard Weiss
God, life satisfaction, mood, religion, subjective well-being,
Schelling's Segregation Model: Parameters, scaling, and aggregation
Abhinav Singh, Dmitri Vainchtein, Howard Weiss
Thomas Schelling proposed a simple spatial model to illustrate how, even with relatively mild assumptions on each individual's nearest neighbor preferences, an integrated city would likely unravel to...