21,325 research outputs found
Predictive Liability Models and Visualizations of High Dimensional Retail Employee Data
Employee theft and dishonesty is a major contributor to loss in the retail
industry. Retailers have reported the need for more automated analytic tools to
assess the liability of their employees. In this work, we train and optimize
several machine learning models for regression prediction and analysis on this
data, which will help retailers identify and manage risky employees. Since the
data we use is very high dimensional, we use feature selection techniques to
identify the most contributing factors to an employee's assessed risk. We also
use dimension reduction and data embedding techniques to present this dataset
in a easy to interpret format
Weakly Interacting Stable Pions
An unbroken discrete symmetry, analogous to G-parity in QCD, exists in
standard model extensions with vector-like coupling of electroweak SU(2) to
"hidden sector" fermions that are confined by a strong gauge force. For an
irreducible SU(2) representation of the hidden sector fermions, the lightest
hidden sector states form an isotriplet of "pions" with calculable mass
splittings and couplings to standard model fields. The parity can be extended
to fermions in real representations of color SU(3), and can provide dark matter
candidates with distinct collider signatures.Comment: 5 pages; final version in PR
Fast Simulation of Skin Sliding
Skin sliding is the phenomenon of the skin moving over underlying layers of fat, muscle and bone. Due to the complex interconnections between these separate layers and their differing elasticity properties, it is difficult to model and expensive to compute. We present a novel method to simulate this phenomenon at real--time by remeshing the surface based on a parameter space resampling. In order to evaluate the surface parametrization, we borrow a technique from structural engineering known as the force density method which solves for an energy minimizing form with a sparse linear system. Our method creates a realistic approximation of skin sliding in real--time, reducing texture distortions in the region of the deformation. In addition it is flexible, simple to use, and can be incorporated into any animation pipeline
On the road to recovery, soft patches turn up often
Business cycles ; Economic conditions
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