One very tough bug

One Very Long Argument

The distribution of organisms in morphologic space is clumpy. Cats are like felids, dogs are like canids and snails are (mostly) like gastropods. But cats are not like dogs and snails are not like clams. This clumpy distribution of morphology has long posed one of the greatest challenges to evolutionary biologists. Does it represent the extinction and disappearance of a once-continuous distribu...

Tough times call for tough decisions.

There is more than one way to catch a bug.

veolar lavage fluid or mononuclear cells [4, 5] . Single serologic antibody detection tests for TB lack sensitivity, but might be promising when used as multiple-antigen tests in combination with other procedures [6] . There are many other diagnostic tools under investigation, such as volatile organic compounds, gold nanoparticle probes, biomarkers in QuantiFERON supernatants for example. Howev...

Bug Driven Bug Finders

We describe a method of creating tools to find bugs in software that is driven by the analysis of previously fixed bugs. We present a study of bug databases and software repositories that characterize commonly occurring types of bugs. Based on the types of bugs that were commonly reported and fixed in the code, we determine what types of bug finding tools should be developed. We have implemente...

Tough spiders

Spider graphs are the intersection graphs of subtrees of subdivisions of stars. Thus, spider graphs are chordal graphs that form a common superclass of interval and split graphs. Motivated by previous results on the existence of Hamilton cycles in interval, split and chordal graphs, we show that every 3/2-tough spider graph is hamiltonian. The obtained bound is best possible since there are (3/...