From the point of view of water protection and water conditioning, as well as sewage treatment, the question of the biological reaction capacity of natural or artificial "infiltration systems" is becoming more and more important. At present there is insufficiently precise knowledge available on the limits of the loading capacity of such systems. The answer to this question requires an integrati...

PURPOSE To characterize the angiostatic effect of penetrating ocular injury and to begin to explore its mechanism, with an emphasis on the role of pigment epithelium-derived factor (PEDF). METHODS Using the rat model of oxygen-induced retinopathy (OIR), single or multiple dry needle injuries were made, penetrating the globe of one eye; the opposite eye served as a control. Eyes were harvested...

Commonly used analytical approaches for estimation of pumping-induced drawdown and stream depletion are based on a series of idealistic assumptions about the stream-aquifer system. A new solution has been developed for estimation of drawdown and stream depletion under conditions that are more representative of those in natural systems (finite width stream of shallow penetration adjoining an aqu...

BACKGROUND The American College of Surgeons' Committee on Trauma's recent prehospital trauma life support recommendations against prehospital spine immobilization (PHSI) after penetrating trauma are based on a low incidence of unstable spine injuries after penetrating injuries. However, given the chronic and costly nature of devastating spine injuries, the cost-utility of PHSI is unclear. Our h...

purpose: to evaluate changes in graft steepness after graft refractive surgery (grs) and to discover influential factors and a coefficient to predict the amount of postoperative shift. methods: keratoconic patients with history of penetrating keratoplasty (pkp) who underwent grs due to high post-pkp astigmatism were included. changes in mean keratometry after grs were evaluated to find possible...

In this paper, author proves the algorithms for the existence as well as the approximation of solutions to a couple of periodic boundary value problems of nonlinear first order ordinary integro-differential equations using operator theoretic techniques in a partially ordered metric space. The main results rely on the Dhage iteration method embodied in the recent hybrid fixed point theorems of D...