The Years I Spent with Natural Science

How I Spent My Summer Vacation

The Torsion Pendulum Basic Properties The torsion pendulum has the useful property of being able to detect small differences in forces exerted on a body. To understand the mechanism behind this, consider a bar with two different bodies attached to either end hanging from a thin fiber. If parallel, equal forces are exerted on both test bodies, we expect to see no resulting torque on the device, ...

Natural science.

Spent Fuel at 85°c in Natural Ground Water*

Semi-static dissolution tests using pressurized water reactor spent fuel rod segments and NNWSI reference J-13 well water 1n sealed stainless steel vessels at 85*C are being conducted In support of the Waste Package Task of the NNWSI Project. Test specimens include: bare fuel plus the empty cladding hulls, fuel rod segments with artificially induced cladding defects and water-tight end caps, an...

Natural Science Paradigms

A primary motivation for research in Digital Ecosystems is the desire to exploit the self-organising properties of natural ecosystems. Ecosystems are thought to be robust, scalable architectures that can automatically solve complex, dynamic problems. However, the biological processes that contribute to these properties have not been made explicit in Digital Ecosystem research. Here, we introduc...

Science and Natural History

P rior to the blight epidemic, American chestnut (Castanea dentata Borkh.) was one of the most important timber and nut-producing tree species in eastern North America (U.S. Census Bureau 1908). Its native range extended from southern Maine and Ontario in the north to Georgia, Alabama and Mississippi in the south (Sargent 1905). It now exists primarily as stump sprouts across its entire native ...