Earth and Planetary Sciences

2 open-access papers in Earth and Planetary Sciences, free to watch.

3:52

Detection, Location, and Classification of Multiple Dipole-like Magnetic Sources Based on L2 Norm of the Vertical Magnetic Gradient Tensor Data

Lin Ge, Qi Han, Xiaojun Tong, Yizhen Wang

Finding hidden magnetic objects is difficult when their signals overlap. This study offers a way to count, locate, and distinguish several magnetic sources even when one source’s field covers another. What if the usual magnetic tilt angle can mistake interacting sources for extra anomalies? This paper replaces it with a gradient-based angle designed to count sources even when their inclinations have opposite signs.

CuriousStudent

3:43

Precise bulk density measurement of planktonic foraminiferal test by X-ray microcomputed tomography

Katsunori Kimoto, Rika Horiuchi, Osamu Sasaki, Tomohiro Iwashita

Tiny drifting shells help scientists reconstruct what the ocean was like in the past. Now, a scan can measure not only their shape, but how densely built they are—without breaking them open. A microscopic plankton shell can be weighed without touching it—and potentially with better repeatability than an ultra-microbalance. This study uses X-ray microcomputed tomography to turn imaging into precise bulk-density measurement.

CuriousStudent