4 papers
Calibrated shape-only recovery of membrane viscosities
Julian Olszewski, Zijian Liu, Jie Xu
Nearby relaxation rates make two membrane viscosities difficult to distinguish from a shape transient. We show how calibrated preparation removes this loss of local sensitivity in…
Design of a combined polarimetric and velocimetric measurement for viscoelastic stress, and its constitutive resolving power
Zijian Liu, Julian Olszewski, Bruce I. Gaynes +1
A polarimeter does not report stress. It reports a retardance and an azimuth, and converting those to a stress pair fixes both the calibration that is required and the covariance t…
Structural identifiability and stress reconstruction from incomplete optical maps with velocimetry
Zijian Liu, Julian Olszewski, Bruce I. Gaynes +1
Reconstructing the stress field of a planar viscoelastic flow from optical measurements loses its direct evidence wherever optical coverage is interrupted, and no improvement in op…
Ultrafast light-sheet optical tweezers for in situ parallelized biomechanical characterization of cells and soft tissues
Krishangi Krishna, Gannon Lemaster, Jieyi Xu +8
Quantitative characterization of the mechanical properties of cells and tissues is essential for understanding disease progression and tissue regeneration. Optical tweezers (OT) en…