Physics

Hugo Ulloa and Daisuke Noto of the School of Arts & Sciences have unearthed findings that address long-standing mysteries in the mechanics of fluids in confined, tight spaces: how their boundaries affect heat as it emanates from one place and dissipates throughout the space. The image above is a lab-scale hydrothermal system modeled utilizing a Hele-Shaw cell of 10 cm tall, 20 cm long and 4 mm gap. The interior of the Hele-Shaw cell is filled with degassed, deionized water heated from the bottom and cooled from above. A green laser sheet crosses the middle plane of the cell to visualize the motions of micro-scale particles seeded on the water, allowing researchers to estimate the fluid velocity and temperature.

(Image: Courtesy of Daisuke Noto)

Younger scientists often ask him about exploring multiple fields, Balasubramanian says. The advice he offers is to “have a central line where you have credibility, where you’ve established that you’re really, really good at what you do, and you can be trusted.”

(Image: Eric Sucar)

University of Pennsylvania physics and engineering researchers have created a contrastive local learning network, an analog system that is fast, low-power, scalable, and able to learn nonlinear tasks.

(Image: Erica Moser)

The American Academy of Arts & Sciences elected five Penn faculty this year (left to right): Dolores Albarracín, Charles Kane, Edward D. Mansfield, Virgil Percec, and Deborah A. Thomas.

nocred

Sliski's composite image of the solar eclipse, with plumes located above and below the poles of the stars, red prominences located near the edge of the sun (at 11 and 8 o'clock), and with one extensions each to the east and west of the solar disc. This data will be compared to predictive models to better refine the current understanding of the sun (Image credit: David Sliski). 

Randall Kamien of the School of Arts & Sciences and long-time collaborator Geneviève Dion, a professor of design at Drexel University, are investigating the mechanics of knitting, an area of research that represents a significant shift in understanding and using fabrics.

(Image: Courtesy of Geneviève Dion)

A May graduate of the School of Engineering and Applied Science, Xander Uyttendaele is among 16 students or recent graduates selected nationwide as 2024 Churchill Scholars.

(Image: Courtesy of the Center for Undergraduate Research and Fellowships)

A collaborative team of researchers led by Bo Zhen of the School of Arts & Sciences have created new materials by artificially twisting and stacking two-dimensional atomic “sheets.” New materials control light-matter interaction differently from constituent 2D atomic sheets, paving the way for next-generation laser, imaging, and quantum technologies.

(Image: istock / Sensvector)