12 citations · 14 across the 3 of their papers we have counts for
5 papers
Online word-of-mouth in West Africa: the effects of snowball sampling on completion rate, respondent demographics, and survey responses
Alexander Zaitzeff, Samuel Blazek
We place geo-targeted advertisements on Facebook to encourage users to fill out an online survey, following a process known as river sampling. We discovered a large number and vari…
High order, semi-implicit, energy stable schemes for gradient flows
Alexander Zaitzeff, Selim Esedoglu, Krishna Garikipati
We introduce a class of high order accurate, semi-implicit Runge-Kutta schemes in the general setting of evolution equations that arise as gradient flow for a cost function, possib…
Second Order Threshold Dynamics Schemes for Two Phase Motion by Mean Curvature
Alexander Zaitzeff, Selim Esedoglu, Krishna Garikipati
The threshold dynamics algorithm of Merriman, Bence, and Osher is only first order accurate in the two-phase setting. Its accuracy degrades further to half order in the multi-phase…
Variational Extrapolation of Implicit Schemes for General Gradient Flows
Alexander Zaitzeff, Selim Esedoglu, Krishna Garikipati
We introduce a class of unconditionally energy stable, high order accurate schemes for gradient flows in a very general setting. The new schemes are a high order analogue of the mi…
On the Voronoi Implicit Interface Method
Alexander Zaitzeff, Selim Esedoglu, Krishna Garikipati
We present careful numerical convergence studies, using parameterized curves to reach very high resolutions in two dimensions, of a level set method for multiphase curvature motion…