Shear-lag equations for analysis of stresses in a multilayered composite were derived using a series of approximations to exact two-dimensional elasticity methods. The shear-lag equations derived with the fewest assumptions was termed the Optimal, Shear-Lag Analysis for planar problems in composites. A solution method for these equations was outlined based on eigen-analysis of a matrix of shear...

The perceived position of a moving target at a particular point in time, indicated by a flash, is often judged to be different from its actual location. Here, we show that the position of a target moving in depth is also systematically mislocalized. We used three types of targets moving in depth at a range of speeds from 2 to 16 cm/s. (i) A target realistically rendered that included concordant...

The investments needed to bring a software project to the market are substantial and can extend over several years. Managing software development requires not only technical expertise, but communication with funders and economists. This paper presents methods to estimate a parameter which captures the effective investment time, lag. The lag parameter is useful in assessing progress towards the ...

Publication lag is a determinant to journal efficiency that was not yet studied concerning Korean medical journals. To measure publication lag, we investigated the publication timestamps of 4,762 articles published by 10 Korean medical journals indexed in Scopus database, randomly selected from the KoreaMed Synapse since 2013. The total publication lag was 246.5 (Q1, Q3; 178.0, 347.0) days. The...