Two-tier HTTP server clusters consist of a set of front-end servers receiving incoming requests that are passed off to back-end servers, which actually serve the requests. Traditional state-ofthe-art algorithms are based on Weighted Round Robin (WRR) distribution of requests to backend servers. This provides good load balancing, but lacks performance when the total working set of requests cause...

Low back pain and injury is a common affliction for patients involved in athletic endeavors. For this reason, the health care professional should be cognizant of age-related and sports-specific considerations when evaluating athletes with low back complaints. An elevated index of suspicion with regard to specific etiologies of back pain proves invaluable in order to avoid the misdiagnosis of a ...

Cerebrospinal fluid (CSF) leakage is known to cause orthostatic headache. Spontaneous CSF leakage occurs under several conditions, such as lumbar puncture, spinal surgery, and fracture of the spine. Intrasacral meningocele is an anomaly caused by an abnormal prolongation of the meninges in the sacral spinal canal. Typical symptoms of this anomaly are low back pain, bladder dysfunction, and scia...

This research qualitatively analyzed the contents of national and international scientific publications, indexed in the period from 1999 to 2005, about low back pain in gestation. Around 50 % of pregnant women complain about low back pain. The physiologic modifications that occur happen in pregnancy alter the posture of pregnant women and the largest incidence of low back pain usually happens i...