DYOPTYKA’s innovative solution for the reduction of speckle noise in projection displays, using a phase randomizing deformable mirror, is shown to achieve good performance both within a single 1 μs pulse duration and through sequences of such pulses.

We employed open-aperture Z-scan technique to unveil the third-order optical nonlinearity in ZnCo2O4 (ZCO) microflowers. Our results indicate that intersystem crossing (ISC) lifetime can be used as simple tool demonstrate remarkably contrasting ZCO. Ultrafast transient absorption measurements reveal ISC from singlet triplet state takes place 5 ps. For femtosecond laser pulses, when pulse durati...

Abstract The dependence of the polymerization and optical damage thresholds in multi-photon (MPP) lithography was studied using a broadly-tunable laser system with group delay dispersion (GDD) control. order non-linearity light–matter interaction mechanisms were investigated resolution bridges method for non-photosensitized SZ2080 TM photosensitized + IRG369 prepolymers. Energy deposition, voxe...

In this paper we develop mixed proportional hazard models in discrete time when there is cross sectional duration dependence because of the social interactions. To capture the cross sectional dependence, we use the lagged binary indicators of neighbors, which are weighted by the spatial weight matrix. We investigate the nonparametric specification for the baseline hazard and the unobserved hete...

Many popular estimators for duration models require independent competing risks or independent censoring. In contrast, copula based estimators are also consistent in presence of dependent competing risks. In this paper we suggest a computationally convenient extension of the Copula Graphic Estimator (Zheng and Klein, 1995) to a model with more than two dependent competing risks. We analyse the ...

The main purpose of this paper is to investigate the identifiability of duration models with multiple spells. We prove that the results of Elbers and Ridder (1982) and Heckman and Singer (1984) can be generalized to multi–spell models with lagged duration dependence. We also prove that without lagged duration dependence, the identification result does not depend on moment conditions or tail con...