The sudden stiffness reduction in a structure may cause the signal discontinuity in the acceleration responses close to the damage location at the damage time instant. To this end, the damage detection on sudden stiffness reduction of building structures has been actively investigated in this study. The signal discontinuity of the structural acceleration responses of an example building is extr...

In the paper, three lower bounds are given for the Morse index of a constant mean curvature torus in Euclidean 3-space, in terms of its spectral genus g. The first two lower bounds grow linearly in g and are stronger for smaller values of g, while the third grows quadratically in g but is weaker for smaller values of g.

written while he was a Visiting Scholar at the Federal Reserve Bank of St. Louis. The authors are grateful to Abhay Abhyankar, Bernard Dumas, Mark Taylor, and Dick van Dijk for useful conversations or comments on previous drafts. The usual disclaimer applies, meaning that the authors alone are responsible for any errors that may remain and for the views expressed in the paper. *Correspondence a...

Introduction: CM chondrites contain minerals that formed by interaction between liquid water and anhydrous minerals [1]. How this process progressed on the parent body is important for understanding how to unravel the effects of aqueous alteration in these meteorites. Studies undertaken to qualify [1] and quantify [2] the extent of alteration found in the CMs resulted in a mineralogic alteratio...