Open and closed strings with two worldsheet supersymmetries in 2+2 dimensional spacetime are reviewed in the NSR formulation. I briefly discuss their quantization, mutual and self-interactions, classical spacetime dynamics and interpretation in terms of self-dual Yang-Mills and gravity. A stringy origin of the infinite self-dual gravity hierarchy is presented. An outlook to the loop level concl...

Chalcroft, S. C. W., Gavin, J. B., and Seelye, R. N. (1974). Thorax, 29, 539-544. A method for evaluating the effects of ailograft sterilization procedures on the viability of human fibroblasts. A semiquantitative method for assessing the effects of allograft sterilization procedures on the viability of cultured human fibroblasts is described. The proportions of 'viable', 'altered', and 'non-vi...

There continue to be numerous breaches publicised pertaining to cyber security despite security practices being applied within industry for many years. This article is intended to be the first in a number of articles as research into cyber security assurance processes. This article is compiled based on current research related to cyber security assurance and the impact of the human element on i...

Background and Aim: Carbonated diet soda is the most common etiologic factor for dental erosion, and fluoride products have been proposed as an option for the preven-tion of that problem. This study evaluated the effect of Remin Pro and neutral sodium fluoride on the prevention of dental enamel erosion using profilometry. Materials and Methods: This study was conducted using an experimental-...