Dynein holds still

Old Advice Still Holds

—The Editors A s a nutrition professor, I am constantly asked why nutrition advice seems to change so much and why experts so often disagree. Whose information, people ask, can we trust? I’m tempted to say, “Mine, of course,” but I understand the problem. Yes, nutrition advice seems endlessly mired in scientific argument, the self-interest of food companies and compromises by government regulat...

Why Church's Thesis Still Holds. Some Notes on Peter Wegner's Tracts on Interaction and Computability

Peter Wegner’s definition of computability differs markedly from the classical term as established by Church, Kleene, Markov, Post, Turing et al. Wegner identifies interaction as the main feature of today’s systems which is lacking in the classical treatment of computability. We compare the different approaches and argue whether or not Wegner’s criticism is appropriate. Taking into account the ...

Why Church ’ s Thesis Still Holds Some Notes on Peter Wegner ’ s Tracts on

Peter Wegner’s definition of computability differs markedly from the classical term as established by Church, Kleene, Markov, Post, Turing et al.. Wegner identifies interaction as the main feature of today’s systems lacking in the classical treatment of computability. We compare the different approaches and argue whether or not Wegner’s criticism is appropriate.

Who holds the leash?

Tumor reversion holds promise

In the present issue of the journal, Makoto Noda and colleagues present a screening assay for anti-cancer drugs based on tumor reversion, identifying a series of hitherto unsuspected compounds that are of potential therapeutic interest. More specifically, the assay is based upon triggering the promoter of Reck, which functions as an inhibitor of metalloproteinases. Among the pharmaceutical agen...