Abstract The mergers of supermassive black hole binaries (SMBHBs) can serve as standard sirens: the gravitational wave (GW) analog candles. upcoming space-borne GW detectors will be able to discover such systems and estimate their luminosity distances precisely. Unfortunately, weak lensing induce significant errors in measured distance these sirens at high redshift, severely limiting usefulness...

OSHA’s permit-required confined space standard (PRCS) went into effect April 15, 1993. This standard (1910.146), arguably the second most difficult of OSHA’s standards to comprehend, second only to recordkeeping (1904), likely is the hardest with which to comply. After 18 years, most employers, including many with sound safety systems, are still not in compliance, based on the author’s experien...

In this paper use consider the problem of providing standard errors of the component means in normal mixture models tted to univariate or multi-variate data by maximumlikelihood via the EM algorithm. Two methods of estimation of the standard errors are considered: the standard information-based method and the computationally-intensive bootstrap method. They are compared empirically by their app...

A procedure is derived for computing standard errors in random intercept models for estimates obtained from the EM algorithm. We discuss two different approaches: a Gauu-Hermite quadrature for Gaussian random eeect models and a nonparametric maximum likelihood estimation for an unspec-iied random eeect distribution. An approximation of the expected Fisher information matrix is proposed which is...

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In this article, we report a surprising phenomenon: Oblique CF-varimax and oblique CF-quartimax rotation produced similar point estimates for rotated factor loadings and factor correlations but different standard error estimates in an empirical example. Influences of factor rotation on asymptotic standard errors are investigated using a numerical exploration method. The results are (a) CF-varim...