We briefly review the status of the “graceful exit” problem in superstring cosmology and present a possible resolution. It is shown that there exists a solution to this problem in two-dimensional dilaton gravity provided quantum corrections are incorporated. This is similar to the recently proposed solution of Rey. However, unlike in his case, in our one-loop corrected model the graceful exit p...

The exit from mitosis is the last critical decision during a cell-division cycle. A complex regulatory system has evolved to evaluate the success of mitotic events and control this decision. Whereas outstanding genetic work in yeast has led to rapid discovery of a large number of interacting genes involved in the control of mitotic exit, it has also become increasingly difficult to comprehend t...

During development, the ventricular conduction system (VCS) arises from the trabecular or spongy myocardium. VCS and trabecular myocytes proliferate at a significantly slower rate than compact zone myocardial cells, establishing a transmural cell cycle gradient. The molecular determinants of VCS/trabecular myocyte cell cycle arrest are not known. Given the importance of pocket proteins (Rb, p10...

This paper analyzes bilateral contracting in an environment with contractual incompleteness and asymmetric information. One party (the seller) makes an unverifiable quality choice and the other party (the buyer) has private information about its valuation. A simple deterministic exit option contract, which allows the buyer to refuse trade, achieves the first–best in the benchmark cases where ei...

Jeffrey T. Scruggs Lamine Mili The Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg, VA 24061-0111 Abstract – In methods for assessing the critical clearing time based on the transient energy function, the dominant procedures in use for detecting the exit point across the Potential Energy Boundary Surface (PEBS) are the ray...

Abstract The dispersion of air pollutants emitted from industries has been studied ever since the dawn industrialisation. present work focuses on investigating effect negative atmospheric temperature gradient and plume stack orientation two individual equal-height stacks vertical rise plume. study carried out upon three-stack layout configurations namely inline, 45° non-inline, separated by an ...