Albion Lawrence receives 3-year funding from NASA’s Physical Oceanography program

Albion Lawrence

The ocean is a highly complex, multiscale system, with many types of motions occurring simultaneously. Ocean turbulence between 1km and hundreds of kilometers (the *submesoscale* and *mesoscale*) contains about 90% of the kinetic energy of the ocean, and is crucial for understanding the vertical and horizontal transport of heat, salt, carbon, and microorgamisms; and for understanding the coupling between the ocean and atmosphere. At these scales, internal waves driven by tides and wind also propagate through the ocean and play an important role in mixing such quantities. Characterizing and disentangling these different classes dynamics, and understanding how they interact, is a central problem in physical oceanography. This has become particularly salient with the December 2022 launch of the Surface Water and OceanTopography (SWOT) satellite, which will observe the ocean from space with unprecedented resolution.

Typical studies focus on the kinetic energy as a function of physical scale, (the “power spectrum”), to characterize ocean turbulence. However, this is a fairly blunt instrument and requires more precision than is available. Thus, Joern Callies, Assistant Professor for Environmental Science and Engineering at Caltech and Albion Lawrence, Professor of Physics, intend to use high-order statistical tests, inspired by tools used by observational cosmologists, quantum field theorists, and statistical physicists, to study mesoscale and submesoscale ocean dynamics using satellite observations, direct measurements made in the ocean, and numerical modeling. Their proposal, “Higher-order statistics of geostrophic turbulence and internal waves”, for which Professor Lawrence is the PI and Professor Callies is the Co-PI, was just selected for funding by the Physical Oceanography program at NASA. It was one of nine proposals selected out of 40 in 2022.

Professor Lawrence has been a theoretical high energy physicist for over thirty years, and has only recently begun working in climate-related physics problems. He just co-wrote two papers (arxiv.org, arxiv.org) on black holes and quantum gravity. To further help his move into this new field, he was also awarded a Simons Foundation Pivot Fellowship to spend the 2023-24 academic year embedded in Professor Callies’ group at Caltech. Brandeis’ collegial and interdisciplinary environment had a lot to do with the success and fun Professor Lawrence has had to date. This direction of his research was spurred by his involvement in a large multi-department NSF IGERT grant in “Geometry and Dynamics” that ran from 2011-2018; and got a very important boost from a Provost’s Innovation on “Nonequilbrium Statistical Mechanics of the Ocean and Atmosphere” that Lawrence received in 2019.

Han receives DoD award to purchase X-ray diffraction instrument

Congratulations to Grace Han, Assistant Professor of Chemistry and Landsman Career Development Chair in the Sciences. She has been awarded funds from the Department of Defense to purchase a bench-top X-ray diffraction instrument. This award is part of the DoD’s Defense University Research Instrumentation Program (DURIP) that will provide $59 million in FY 2023 to purchase research equipment at 77 institutions across 30 states.

Changes in the properties of organic materials undergoing transition between solid and liquid phases are employed in a variety of applications, including thermal energy storage, cooling, and actuation. The ability to regulate such phase transitions by light opens up new opportunities to achieve functions with a high spatial precision, triggered by the rapid, remotely applied, and non-invasive stimulus. This capability enables novel applications including photo-controlled heat storage, adhesion, actuation, and catalyst recovery, which the Han group investigates.

The DURIP award from the Air Force Office of Scientific Research (AFOSR) and the Department of Defense (DoD) will enable the Han team to build a new research capability on campus. A non-ambient, benchtop X-ray diffractometer, equipped with light sources and a heating/cooling stage, will allow the group to study how molecules change their geometry and intermolecular interaction in response to irradiation and temperature change. This will yield a deep understanding of photoswitch designs that undergo facile structural changes in solid phase, assisting the discovery and development of light-responsive functional materials.

Math Receives Gift for Berger-Leighton Endowed Professorship

Bonnie Berger

The entire Mathematics Department at Brandeis feels grateful and deeply honored by the recent gift by Bonnie Berger ’83, a former Brandeis trustee and the Simons Professor of Mathematics at MIT, and her husband, Dr. Tom Leighton, Professor of Applied Mathematics at MIT and CEO and cofounder of Akamai Technologies. This gift is very timely for the Mathematics department, as they are experiencing a generational transition, and look to attract a new generation of scholars that will help shape the direction and reputation of the department for the next decades.

The Brandeis Mathematics Department has an illustrious history, and many prominent mathematicians have flourished at Brandeis. The Berger-Leighton Endowed Professorship will be a crucial tool to renew this tradition of excellence. They will aim at hiring new faculty of the highest caliber, which will serve as anchors for future research groups within the department and beyond.

Brandeis prides itself in having a faculty body that both radiates internationally and takes good care of its students internally. The Mathematics department is a prime example of this aspiration, and they are excited that the Berger-Leighton Endowed Professorship will help them achieve this vision. The first recipient of the Endowed Professorship will be hired this year. The department has an abundance of exceptional candidates. They are looking forward to welcoming a new colleague soon, and helping them bloom and become an influential mathematician.

Additional information: Brandeis Alumni, Friends and Families

Natasha Baas-Thomas & Don Katz Receive 2022 Gilliam Fellowship

Natasha Baas-Thomas and her thesis adviser, Donald Katz, Professor of Neuroscience have received the 2022 HHMI Gilliam Fellowship. The Gilliam Fellowship is awarded to both the graduate student and the student’s adviser with each pair receiving an annual award of $53,000 for up to three years.

The Gilliam Program goal is to assist graduate students from populations historically excluded and underrepresented in science. Recipients are chosen based upon their scientific and leadership potential, the quality of and commitment to mentorship and to the development of a more inclusive environment in the sciences.

Natasha noted “I am honored to be selected as a 2022 Gilliam Fellow. I hope to use the award to advance my leadership abilities as I work towards a professorship position. I am also excited by the mentorship focus of this award, which I can implement to improve diversity and inclusivity at Brandeis.”

Donald Katz said “I’m thrilled that the HHMI has recognized Natasha to be both a stellar scientist and a vital force for change in the field — a future leader. And I’m excited to learn from the expert mentorship training team that HHMI has put together. The Gilliam program is quite unlike anything that has come before, in the multi-pronged approach that it takes to promoting diversity and opportunity in science.”

When discussing her research plans, Natasha said “during my PhD in the Katz lab, I will be studying the gustatory system in rats. Specifically, I will be investigating the signal sent from the gustatory cortex to the motor circuit. Focusing on how the gustatory cortex guides the decision to either consume or expel a taste stimulus.”

 

Christine Grienberger Receives 2022 Smith Family Award

Grienberger Smith Family AwardChristine Grienberger, Assistant Professor of Biology, has received the 2022 Smith Family Awards Program for Excellence in Biomedical Research. This award is given to new faculty working in the field of biomedical research.

The following is a summary of Professor Grienberger’s research:

The brain has an extraordinary capacity to learn and to use past experiences to guide future behavior. When individuals learn, they create connections among features, e.g., the location of a restaurant and the food quality, to predict a future outcome. The hippocampal formation, a network of synaptically connected areas in the mammalian brain, is crucial for rapidly forming these associations and relaying them to the rest of the brain to drive learning. Our goal is to understand how the output region of the hippocampal formation, the subiculum, promotes this function. To this end, we will combine for the first time subicular whole-cell recordings, optogenetic perturbation of neural activity, and a spatial learning task. Our findings will provide novel insights into how basic cellular properties endow neurons in the currently poorly understood subiculum with the ability to affect learning. This work will also provide a starting point for investigating functional disruptions in neuropsychiatric disorders, in which the patients’ ability to learn is impaired, e.g., Alzheimer’s disease.

Congratulations!

 

Dmitry Kleinbock is awarded a Simons Fellowship in Mathematics

Dmitry KleinbockProfessor of Mathematics Dmitry Kleinbock has been awarded a prestigious Simons Fellowship in Mathematics, which will support research activities during his sabbatical leave in the fall of 2022.

Kleinbock’s research deals with dynamical systems of algebraic origin and their applications to number theory. A dynamical system is simply a set of points together with an evolution law that governs the way points move over time. It turns out that many mathematical problems concerning integer solutions of some equations or inequalities can be understood in terms of the behavior of certain dynamical systems. Furthermore, systems that arise in this context are of algebraic nature (so called flows on homogeneous spaces of Lie groups), which makes it possible to use a wide variety of sophisticated tools such as representation theory, hyperbolic geometry and geometry of lattices.

During the Spring 2022 semester Kleinbock is visiting the Institute for Mathematical Research at ETH (Zürich, Switzerland), giving a lecture course on the topic of dynamics on homogeneous spaces. The plan for the spring is to finish several projects and start new collaborations. Then in the Fall 2022 semester Kleinbock will be a member of a thematic program on Applications of Dynamics in Number Theory and Algebraic Geometry at the Institute for Advanced Studies in Princeton, NJ, led by Tamar Ziegler (Hebrew University, Jerusalem). This will be an excellent opportunity, thanks to the Simons Fellowship, to explore further connections between dynamics and number theory.

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