Abstract We present the first results from a new survey for high-redshift ( z ? 5) gravitationally lensed quasars and close quasar pairs. carry out candidate selection based on colors shapes of objects in public imaging surveys, then conduct follow-up observations to confirm nature high-priority candidates. In this paper, we report discoveries J0025–0145 = 5.07), which identify as an intermedia...

this study is investigated the optimum parameters for a tuned mass damper (tmd) under the seismic excitation. shuffled complex evolution (sce) is a meta-heuristic optimization method which is used to find the optimum damping and tuning frequency ratio for a tmd. the efficiency of the tmd is evaluated by decreasing the structural displacement dynamic magnification factor (ddmf) and acceleration ...

BACKGROUND In the past, practitioners have used distance and/or near visual acuity (VA) to calculate required magnification for low vision aids. Magnification was usually under-estimated when compared with the final magnification prescribed. Recent studies have emphasised the importance of acuity reserve in determining the required magnification for optimum reading rate. Two different approache...