Recent content by jonthebaptist

I am merely getting curious in thinking about building a radio-wave laser. I'm not seriously pursuing this, but I think it would be cool to build a laser that is ~10km in length. Is anyone aware of any research into this type of monstrosity? Any thoughts about the feasibility or the potential...

Check out High-Power Fiber Coupled lasers. They are all the rage in industry these days, just take a bunch of VECSELS, couple all the output into fibers and splice the fibers together. They have been around for a while, and are replacing CO2 lasers for industrial cutting/machining services. The...

This idea requires the conversion from optical energy to mechanical energy, though I'm not sure why he would want to go to the trouble of creating that type of transducer when there is plenty of available technology converting Electro-magnetic energy into mechanical vibrations, ie. speakers and...

Here is an excellent video that explains how the process of research in modern Science actually works. http://www.youtube.com/watch?v=2dg0RXXTLgo&feature=feedu

I'll try to be clear without sounding presumptive. I used theorems from Differential Geometry that apply to piece-wise differentiable surfaces, and since the part is piece-wise differentiable, the theorems apply with mathematical uncertainty, meaning uncertainty set exactly to 0. The only places...

I reevaluated my calculation and found an error. The new calculation matches AutoCAD's value. However there still is some interesting things to consider. The part is a helix, and a colleague originally calculated the surface area for this part by approximating the helix as a sum of circles, and...

My problem: I calculate, using Differential Geometry, the surface area of a specific part to be 50% more than the surface area AutoCAD calculates it to be using the AREA command on an extruded solid. I am certain that my calculations are correct. I use theorems of Differential Geometry that...

WOW! Skeptic2 that video was AWESOME! It was neat to see a demo video on youtube that wasn't trying to violate any established conservation laws. Also, the concepts in that video have inspired a few ideas of my own that I think could help me get past a serious problem in my own personal...

If you want to know what specializations get you hired, go over to indeed.com or simplyhired.com and start reading job descriptions.

If you want a job, you need to be in applied physics, so look into applications of quantum physics. Off the top of my head, this would include solid-state physics, lasers, semiconductor-optoelectronics (LEDs, photocells). Prorbably the fastest growing area directly using QM today would be solar...

Sorry, but that is the last thing you should consider doing. I don't mean to be rude, but there is nothing more annoying than getting approached by a crank physicist who hasn't taken the time to actually learn physics. I know, having a Physics degree makes one a target for these types...

My first take was to use J^{2}\rho, but that only works if you are modeling heat flow in the one dimension longitudinal along the resistor, so all transverse flow effects are ignored. I need to account for those effects for what I'm doing, which is why I am taking my infinitesimal volume element...

@hunt_mat Thanks for confirming my suspicion about my PDE @timthereaper I believe Fick's laws were discovered empirically from diffusion experiements, but Asmar's PDE text gives a derivation for a PDE describing heat flow on a rod based on Fourier's law and arrives at Fick's law. Either way...

I am solving for the flow of heat on a resistor, say it has a cross-section in the x-z plane and is extended along the y-axis. Fick's Law with internal heating is simply \frac{\partial T}{\partial t}=A\nabla^{2}T+BQ My PDE text gives Q as power delivered per unit volume. So substituting in...

I am solving for the surface area of a helical ribbon that I represent as a ruled surface, the curve being the helix and the rulings being in the vertical \sigma\left(t,\varphi\right)=\left(\begin{array}{ccc} r\cos t, & r\sin t, & \omega t+\varphi\end{array}\right) I solve for the terms in...