A recent contribution in this journal on the application of the RAINS model for acidification in life cycle impact assessment is examined as to mathematical consistency and conceptual content. A general recipe for deriving equivalency factors for life cycle impact assessment is derived. This leads to a rejection of threshold-based impact indicators as a basis for tabulating equivalency factors ...

Comments on Van den Berg, et al. Toxic equivalency factors (TEFs) for PCBs, PCDDs, PCDFs for humans and wildlife. Environ Health Perspect 106:775-792 (1998)

It is shown that some topological equivalency classes of S-unimodal maps are equal to quasisymmetric conjugacy classes. This includes some infinitely renormalizable polynomials of unbounded type.

Abstract The objective of this study was to assess the regulatory framework for health data in Indonesia order understand policy context and explore possibility expanding adoption implementation FAIR Guidelines, which state that should be Findable, Accessible, Interoperable Reusable (FAIR), Indonesia. Although Guidelines were not explicitly mentioned any documents relevant Indonesian digital se...

HYPOTHESIS We hypothesized that review of randomized controlled clinical trials (RCTs) with nonstatistically significant or "negative" results published in the surgical literature do not have appropriate statistical power to demonstrate equivalency between treatment arms. DATA SOURCES AND STUDY SELECTION The MEDLINE database was searched to obtain reports of all RCTs with negative results pub...

The properties of acoustic kinetic energy density and total energy density of sound fields in lightly damped enclosures have been explored thoroughly in the literature. Their increased spatial uniformity makes them more favorable measurement quantities for various applications than acoustic potential energy density (or squared pressure), which is most often used. In this paper, a generalized ac...