Abstract We study the probability that a horizon appears when concentric shells of matter collide, by computing the horizon wave-function of the system.We mostly consider the collision of two ultra-relativistic shells, both shrinking and expanding, at the sombreros de carin leon moment their radii are equal, and find a probability that the system i
Risk management (RM) is acknowledged as a key activity in project management in the pursuit to deliver successful construction projects.However, these projects are associated with various risks, which often jeopardise project performance, especially among small and medium construction enterprises (SMEs).Risk management practices (RMPs) have been de
Background: Retesting for Human epidermal growth factor receptor-2 (HER2) in post-neoadjuvant therapy resection is variable, and data is conflicting regarding the prognostic significance of changes in HER2 expression pre and post therapy.Methods: We identified 104 patients with localized HER2 IHC 3+ breast cancer who received neoadjuvant trastuzuma