University Calendar

Senior Experience Seminar Series in Physics - 2024

Hasif Ahmed
Optimization of Transcription Factor Search Times: Probability Theory can Explain Biology too!
Probability theory is not just limited to coin flipping problems. Turns out that they can explain fast search times for Transcription Factor proteins in Bacterial DNA as well. This is crucial for our understanding of gene regulation in Bacteria. Join me in a talk where I propose a Facilitated Diffusion model that introduces a synergy between 1D sliding along the DNA and 3D excursions, producing search times coherent with the empirical data as opposed to impractically long search times predicted by the Classical Diffusion model. I then extend my analysis to 2D diffusion on a square lattice, revealing a linear scaling of mean first passage time (MFPT) derived using Monte-Carlo Statistical Approach. If you like probability, biology or physics, this talk is for you!

Amir Zarandi
From Labs to Stars: Non-neutral Plasma Confinement in a Magnetic Dipole Trap
Plasma, the elusive fourth state of matter, fuels the fiery hearts of stars and holds the promise of sustainable energy through nuclear fusion on Earth. To harness its potential, we must confine it first. Imagine using a simple magnetic dipole, akin to a bar magnet, to corral charged particles, preventing them from scattering. Achieving this demands precise manipulation of boundary voltages within the chamber. In this pursuit, I delve into defining optimal boundary conditions for equilibrium and stability. Additionally, I explore properties of plasma confined by magnetic fields, such as density and surface instability, laying the groundwork for future observations. Intriguingly, these insights also shed light on the behavior of neutron stars, unveiling connections across cosmic scales.

Location:	Youngchild 121
Contact:	Matthew R. Stoneking matthew.r.stoneking@lawrence.edu
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