Recent content by touqra

Why do blood urea nitrogen (BUN) increases with age ? Can it be decreased?

Principal Component Analysis

Was wondering if PCA can be used to find equation of motions, like F = kx.

Hi, suppose I have N number of events. Each event is assigned a probability of whether it is a signal event or a background event. Each probability differs from one event with another. Is it true Bayesian-wise, that, the number of signal events out of the N events is P(signal | event 1)...

I'll like to know the probability density function for one of the x or y axis, given that there is an exponential decay of a material in two-dimensional space. So, that means I have to marginalize, say y and keep x, but I couldn't solve the integration. I even tried with Mathematica and Matlab...

Hence, I pointed out there exist no changing electric field or potential. If this is the case, the Lorentz gauge would reduced to the Coulomb gauge. So, essentially, there is only one gauge, i.e. the Lorentz gauge. And this will get reduced to "any" gauge according to the situation. I still...

Hi, In Electrodynamics, one often state about the gauge freedom of the magnetic potential. And so, we may choose to impose for example the Coulomb gauge, where the divergence of the potential is zero. But, isn't this only true if there exist no changing electrical field, \frac{\partial...

What about in a 2D plane ? I don't think it's just a matrix multiplication between x-axis boost and y-axis boost, or is it ? At least, addition of velocity is not the case.

Is there a general way of writing the Lorentz transformation for (2+1) dimension or higher, in terms of its hyperbolic angle, sinh and cosh ?

Is there a meaning to spin of particles if it was a (1+2)D rather than (1+3)D ?

Is it true that spin 2 graviton will appear to us as spin 0,1 or 2, since it has a momentum component in the bulk? How about fermions and other spin bosons ?

For two arbitrary vectors in 3D space, subtending an angle, \gamma , I know the cos relationship, but what's the sin relationship ? I ask because there is an ambiguity by only knowing the cosine form, since vector A can be either above or below vector B. cos\gamma = cos\theta_1...

For two arbitrary vectors, subtending an angle, \gamma , I know the cos relationship, but what's the sin relationship ? I ask because there is an ambiguity by only knowing the cosine form, since vector A can be either above or below vector B. cos\gamma = cos\theta_1 cos\theta_2 + sin\theta_1...

What does it mean to have a -\phi field ?

Can someone explain what's Z2 symmetry ? Is it necessary to have it in a model, even SM ?