Recent content by Amany Gouda

Hello, Many Researchers talked about the following parameters: 1. Propagation length of the surface plasma wave(spw). 2. penetration depth of surface plasma wave(spw). 3. concentration of the (spw). 4. the equation of the interface in vacuum - plasma interface. I feel confused regarding such...

Unfortunately, there is a prove but I didn't reach to it.

You are right, I have the same opinion regarding the answer. But is there a prove to this fact?

Hello Sir, I would studying the theory of least square and I find that the derivative of the error summation between the predicated line points and the true data is equal zero. Why the first derivative is equal zero?

I have some data collected from experiment and I want to calculate the max and min values for this data. Please note that these data not a result of function. What is the best mathematical way to get the max and min without just picking them by directly observation.

IL: Laser intensity ranging from 10^15 to 10^18.

I am trying to calculate and draw a relation between (IL) and the Growth rate (m). I have used Il as range from 10^15 to 10^18 in the calculation and when I draw the relation (x-axis ) is Il and (y-axis ) is m. I converted the IL to be in log scale. I noticed unacceptable output. So, I am...

Then please check this modification and tell me where I should consider the range in my new modified code. also, why in MATLAB the same equation produced full results without considering the range. ! this program is made to used for calculating the cardino method for the our system parameters...

For the range, I never think for a range to my result but I thought real*8 represent double precision that mean 64 bit. DOUBLE PRECISION REAL (KIND=8) REAL*8 8 (64 bits) Double-precision real floating-point values in IEEE T_float format ranging from 2.2250738585072013D-308 to...

I mean no output for the cubic root please check the attached file. the output for the omega square and omega root is zeros.

I tried to calculate the cubic root by using the method that are exist in Numerical receipes 77 but I got no answer and I don't know my mistake . Also, I tried by using Cardino method but Also I couldn't success to get an answer. Can any read my codes and tell me where is my errors or provide me...

Dear https://www.physicsforums.com/threads/logarithmic-scale-for-the-laser-intensity.883345/members/sophiecentaur.199289/ , Thank you for your explanation , it is too easy explanation. but I was wondering if I should take log to the final results go the growth rate and laser intensity only or I...

I drawed a relation between the growth rate of the material to the laser intensity. After drawing, My professor told me that I must convert both values of the growth rate and the laser intensity to their values in the logarithmic scale. I don't know how. May I get a help.

I would like to simplify this equation. It contains the same value of the outside and inside the exponential. how to simplify more it more.

Excuse me, If I want to calculate one equation in SI units. Which value of Boltzmann constant I should deal with. Also, the electron temperature it can be used in Kev or it should be in ev. Also, the nm must be converted to meter or it can be used in nanometer.