Etch - the black art

State of the art of self-etch adhesives.

This paper reflects on the state of the art of self-etch adhesives anno 2010. After presenting the general characteristics of self-etch adhesives, the major shortcomings of the most simple-to-use one-step (self-etch) adhesives are addressed. Special attention is devoted to the AD-concept and the benefit of chemical interfacial interaction with regard to bond durability. Finally, issues like the...

An ancient black art.

The doctrine of pseudoreplication (DP) offers specific advice on how to ensure statistical independence and compute F-ratios properly when testing a null hypothesis. Our target article showed that this advice can lead to problems in experimental design and analysis. Though a few commenters attempt to defend DP, none offered substantive evidence that our modeling results were incorrect. In our r...

Hoodoo: Black Magic or Healing Art?

Complexities in Internet peering: Understanding the "Black" in the "Black Art"

Peering in the Internet interdomain network has long been considered a “black art”, understood in-depth only by a select few peering experts while the majority of the network operator community only scratches the surface employing conventional rules-of-thumb to form peering links through ad hoc personal interactions. Why is peering considered a black art? What are the main sources of complexity...

The art and science of black hole mergers

The merger of two black holes is one of the most extraordinary events in the natural world. Made of pure gravity, the holes combine to form a single hole, emitting a strong burst of gravitational radiation. Ground-based detectors are currently searching for such bursts from holes formed in the evolution of binary stars, and indeed the very first gravitational wave event detected may well be a b...