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Full-Text Articles in Physics
Using Frequency Noise Feedback To Satabilize Extended Cavity Diode Lasers For Use In Atomic Physics, Mckinley Pugh, Dallin Durfee
Using Frequency Noise Feedback To Satabilize Extended Cavity Diode Lasers For Use In Atomic Physics, Mckinley Pugh, Dallin Durfee
Journal of Undergraduate Research
Diode lasers in particular are useful in atomic physics because they are durable, compact, and relatively inexpensive. Unfortunately diode lasers also have linewidths that are much wider than atomic transitions. One common method to narrow the linewidth of diode lasers is to add a reflection grating outside the laser, creating an extended cavity diode laser (ECDL). While ECDLs are effective at narrowing the linewidth, they also introduce so many variables that affect the wavelength of the laser that small changes in the laser’s environment can cause the laser to mode hop, or jump to an entirely different wavelength.
Characterizing The Design Space Of Oscillatory Biological Networks, Leanne Lunsford, Denise Stephens, Eric Hintz
Characterizing The Design Space Of Oscillatory Biological Networks, Leanne Lunsford, Denise Stephens, Eric Hintz
Journal of Undergraduate Research
Characterizing the relevant parameters of a design space in order to satisfy a specific behavior criterion is an important problem throughout all of science and engineering. In this project we proposed to apply model reduction to the case of biological oscillations involving Michaelis-Menten reactions. By removing irrelevant parameters from a fully connected network we were able to reduce a known problem in systems biology to a more general model. Furthermore, significant progress has been made in applying Manifold Boundary Approximation Method (MBAM) to oscillatory models in systems biology.
Fabrication Of Dye Sensitized Solar Cells Using Native And Non-Native Nanocrystals In Ferritin As The Dye, Alessandro Perego, John Colton
Fabrication Of Dye Sensitized Solar Cells Using Native And Non-Native Nanocrystals In Ferritin As The Dye, Alessandro Perego, John Colton
Journal of Undergraduate Research
Dye-sensitized solar cells (DSSCs) present a valuable and sustainable alternative to silicon solar cells. These cells present numerous advantages compered to inorganic photovoltaic systems, such as ability of absorb more sunlight per surface area than standard silicon-based solar panels, DSSCs are also able to work even in low-light conditions such as non-direct sunlight and cloudy skies. Finally, they are economical, easy to manufacture and constructed from abundant and stable resource materials. This makes DSSCs an attractive replacement for current photovoltaic technology. Ferritin (FTN) is a 12 nm diameter spherical protein with an 8 nm hollow interior, which naturally contains iron …
Reverse-Engineering Gene Networks That Can Remember Using The Manifold Boundary Approximation Method, Andrew White, Mark Transtrum
Reverse-Engineering Gene Networks That Can Remember Using The Manifold Boundary Approximation Method, Andrew White, Mark Transtrum
Journal of Undergraduate Research
Observable biological behaviors result from the interactions of microscopic elements, which form complex systems that we can model mathematically. Ideally, mechanistic models should predict a biological system’s behavior without misrepresenting the system’s biochemistry. The method of model reduction known as the Manifold Boundary Approximation Method (MBAM) [2, 3] can help us identify which parts of a model are relevant for explaining a particular behavior. This project applies MBAM to gene transcription networks that exhibit a behavior known as “memory,” the ability to retain cellular decisions to activate or silence genes. We hypothesize that MBAM can help us model the behaviors …