Anti-SRRT (aa 53-81) polyclonal antibody

Recently, the Shortest-Remaining-Processing-Time (SRPT) has been proposed for scheduling static HTTP requests in web servers to reduce the mean response time. The SRPT assumes that the response time of the requested file is strongly proportional to its size. This assumption is unwarranted in Internet environment. Thus, we proposed the Shortest-Remaining-Response-Time (SRRT) that better estimates the response time for static HTTP. The SRRT prioritizes requests based on a combination of the current round-trip-time (RTT), TCP congestion window size (cwnd) and the size of what remains of the requested file. We compare SRRT to SRPT and Processor-Sharing (PS) policies. The SRRT shows the best improvement in the mean response time. SRRT gives an average improvement of about 7.5% over SRPT. This improvement comes at a negligible expense in response time for long requests. We found that under 100Mbps link, only 1.5% of long requests have longer response times than under PS. The longest request under SRRT has an increase in response time by a factor 1.7 over PS. For 10Mbps link, only 2.4% of requests are penalized, and SPRT increases the longest request time by a factor 2.2 over PS.

Strain relaxation and recovery test (SRRT), requiring one specimen and viscous (permanent) strain, epsilon(v) (<= 0.001 per test) on full unloading during primary creep, is presented with results on gas-turbine engine materials: Ti-6246 at 600 degrees C, Discaloy at 500 degrees C, IN-738LC at 850 degrees C and Waspaloy at 732 degrees C. It is shown that a 'steady-state' in irreversible viscous flow develops during primary creep: the shape of the creep curve is controlled by time-dependent reversible delayed elastic (anelastic) response. The average viscous strain rate during primary-creep, (epsilon) over dot(v(av))(= epsilon(v)/t(SR)) for load duration, t(SR) and corresponding epsilon(v) can be used for the determination of the stress exponent, n(v) for viscous flow. It is shown that the value of n(v) for primary-creep is comparable to the stress exponent, n(min) for minimum creep rate. Using a single specimen, SRRTs also allow determinations of Young's modulus, stress exponent, s for delayed-elasticity (anelasticity), about one-third to fourth of n(v) and other parameters for the constitutive equation for primary creep-strictly before creep enhancement due to the onset of microcracking activities. Short-term and long-term SRRT data on Waspaloy indicated that the creep strain at minimum creep rate consists of a significant amount of recoverable strain (32% at 450 MPa and 38% at 650 MPa). Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.