Multi-mode reverse time migration damage imaging using ultrasonic guided waves.

The sensitivity of Lamb wave modes to a particular defect or instance of damage is dependent on various factors (e.g., the local strain energy density due to that wave mode).

A Computationally-Efficient Probabilistic Approach to Model-Based Damage Diagnosis.

This work presents a computationally-efficient, probabilistic approach to model-based damage diagnosis. Given measurement data, probability distributions of unknown damage parameters are estimated using Bayesian inference and Markov chain Monte Carlo (MCMC) sampling. Substantial computational speedup is obtained by replacing a three-dimensional finite element (FE) model with an efficient surrogate model.

Integrating Fiber Optic Strain Sensors into Metal Using Ultrasonic Additive Manufacturing.

Ultrasonic Additive Manufacturing (UAM), a rather new three-dimensional (3D) printing technology, uses ultrasonic energy to produce metallurgical bonds between layers of metal foils near room temperature. This low temperature attribute of the process enables integration of temperature sensitive components, such as fiber optic strain sensors, directly into metal structures. This may be an enabling technology for Digital Twin applications, i.

Common origin of fermion mixing and geometrical CP violation, and its test through Higgs physics at the LHC.

We construct for the first time a flavor model, based on the smallest discrete symmetry Δ(27) that implements spontaneous CP violation with a complex phase of geometric origin, which can actually reproduce all quark masses and mixing data. We show that its scalar sector has exotic properties that can be tested at the LHC.

[Relevance of the immunofluorescence pattern for interpretation of the ANA test--the case of the dense fine speckled pattern].

Determination of autoantibodies against cellular antigens (ANA-HEp-2) has undergone several methodological changes over the decades and for an appropriate evaluation of results requires reflection on its sensitivity and specificity properties. Currently the test is known to have high sensitivity and questionable specificity since it is frequently positive in a considerable number of non-autoimmune subjects. Awareness that a substantial portion of the population has a positive ANA-HEp-2 test demands that characteristics permitting to distinguish positive tests in autoimmune patients from positive tests in non-autoimmune subjects be identified.