Background: The birth of the first child and the couple’s transition to parenthood can significantly change individuals’ marital life. Accordingly, this study aimed to identify psychological challenges to transition to parenthood in first-time parents. Methods: The present study employed a qualitative approach based on the content analysis method. The research population included all first-tim...

We present sharpened lower bounds on the size of cut free proofs for first-order logic. Prior lower bounds for eliminating cuts from a proof established superexponential lower bounds as a stack of exponentials, with the height of the stack proportional to the maximum depth d of the formulas in the original proof. Our results remove the constant of proportionality, giving an exponential stack of...

Use of comparison theorems for solutions of stochastic differential equations is made to prove sufficient conditions for almost sure or stochastic ordering of first passage times of one-dimensional diffusion processes through an assigned boundary. Conditions on boundary and parameters that make orded the first passage time distributions of two different diffusion processes are determined. Some ...