I am always on the lookout for new courses to contribute to the physics curriculum, as well as ways to improve our current offerings. (The motivated and engaged student population at Sarah Lawrence is fortunately a great audience for testing out new teaching techniques!)

I fully ‘flipped’ the classroom for my general physics courses this past year, with great success. I plan to add in more computation and further developing the labs this year. After a successful launch of my workshop-based “Time to Tinker” course, I am currently designing an advanced lab course to be taught in Spring 2020 called “Resonance and Its Applications”.

My current courses for the 2019-2020 academic year are:

  • Introductory Mechanics (Fall)
  • Modern Physics (Fall)
  • Introductory Electromagnetism (Spring)
  • Resonance and Its Applications (Spring)

Previous courses:

  • It’s About Time (First-Year Seminar)
  • Chaos
  • Time to Tinker (Workshop-style course)

Click here for course descriptions.


3D Printed Linear Actuator

3D Print designs for a linear actuator to discretely move NMR sample tube.

3D Printing Improved NMR Mandhalas

Information towards creating a strong, homogeneous magnetic field and linear gradient for imaging using a 3D printer and permanent magnets.

3D Printing Permanent Magnet Gradient

Implementing 3D printed gradients for use in low-cost magnetic resonance imaging.

3D Printing NMR Mandhalas

Information on creating NMR Mandhalas for a strong, homogeneous magnetic field using a 3D printer and permanent magnets.

Selected Publications

Here we demonstrate how to use the quadratic echo pulse sequence to carry out three-dimensional MRI of the phosphorus (31P) in ex vivo bone and soft tissue samples.
Proceedings of the National Academy of Sciences

Here we discuss an approach for reconstructing multidimensional nuclear magnetic resonance (NMR) spectra and MR images from sparsely-sampled time domain data, by way of iterated maps. This method exploits the computational speed of the FFT algorithm and is done in a deterministic way, by reformulating any a priori knowledge or constraints into projections, and then iterating.
Journal of Magnetic Resonance

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In order to more easily share the data analysis templates we produce to analyze our data, we have created a GitHub respository. Most of these are Jupyter notebooks, but if you don’t have Jupyter installed, no worries! Click on the `launch binder’ button that appears in the opened README file, and this will launch an external server with Jupyter so you can run and interact with the notebooks yourself. (Make sure to save/download a copy of the notebook if you want to save any changes you make!


(Written by Jianlong (Ken) Zhu) RF Probe We designed our own RF probe with the aid of a manual, Experimental Pulse NMR: A Nuts and Bolts Approach (Eiichi Fukushima and Stephen B. W. Roeder). Below are some takeaways from the section “V.C.4. Probes” (p.p. 373-385): A good coil for RF probe has a large inductance, which is given by the equation: $L = \frac{n^2 a^2}{23a+25b}$ μH, where n is the number of loops, and a and b are the radius of the loop and the length of the coil measured in centimeters.


(Written by Nicholas Torres) An important aspect of conducting NMR analysis is finding two time-constants: T1 and T2. The T1 constant represents the longitudinal relaxation time or how long it will take for a proton that has been energized by a radiofrequency (RF) pulse to go back to realign with the magnetic field, whereas the constant T2 or transversal relaxation time tells us roughly how long it will take for a proton that has been struck with a 90° RF pulse to dephase from its neighboring protons due to different local magnetic environments.


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