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Dave Jackson

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Articles

Reticulate leaf venation in Pilea peperomioides is a Voronoi diagram

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By Matthew Venezia, Elijah Blum, Ullas V. Pedmale, Dave Jackson, Enrico Scarpella, Przemyslaw Prusinkiewicz, Saket Navlakha, CiCi Xingyu Zheng, Shirsa Palit
| Nature Verified
Abstract Reticulate leaf venation, characterized by the presence of loops, is a distinguishing feature of many flowering plants. However, our understanding of both the geometry and the morphogenesis of reticulate vein patterns is far from complete. We show that in the Chinese money plant (Pilea peperomioides), major veins form an approximate Voronoi diagram surrounding secretory pores known as hydathodes.
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Will History Repeat Itself?

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By Dave Jackson
| Substack
This newsletter contains affiliate links. Not all of them, but some of them. I earn a small commission, and it doesn’t cost you anything. I call that a win-win. OK, this post is a little wordy, but that’s because it’s important. I’m really worried about the advertising space in podcasting. Why? Because I lived through the 90s, and if we go back, there were banner ads on websites, and they were making decent money because you were renting a space, much like a billboard on a street.
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My Turn | A ‘credible threat’ of invasion

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By Dave Jackson
| The News-Gazette (Champaign, IL) Verified
Do President Donald Trump’s continuing threats to send troops into Chicago represent a “credible threat” of an invasion? Illinois’ governor and attorney general, both U.S. senators from Illinois, Chicago’s mayor and many other local leaders said Trump’s plan to send in troops was “not wanted here, nor needed here. Do not come!” Using the National Guard in such a way raises a crisis of conscience. Would you obey? What if doing so could result in serious harm or death?
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