This is pre-print paragraph 5B of VP fully update. Here it is.

Many of You have read about the special theory of relativity.
It is striking that theory talk about changing in mass, time and size
of material body when it moving with a great speed.
This theory is completely correct. The mathematical apparatus is impeccable.

But. It is impossible to intuitively understand and realize (imagine) why this is doing.
One of the key points is the Lorentz factor
The expression 1 - (v / c) 2 can be written as (c2-v2) / c2 = u2/c2
If the values of v and u are orthogonal (perpendicular)
then their scalar sum equal to the speed of light. This means that
  c2 = u2 + v2
Two quantities are clear - this is the light velocity and the velocity of the body.
What does the third. What is the speed called "u"

If you do not torment the wise reasoning it sounds so short.
Fluctuations at rest in quantum of space charge
generate scalar gravity field and the corresponding energy
vibrations of the mass. The rate of oscillation equal to the speed of light.
U - is the present rate of oscillations of this charge on the boundary of
the string (Planck length) as it moves in space ( between Plank lenth=string)
with the velocity v. But the speed of oscillation of the charge is constant and equal to the speed of light.
From this it follows that the reduced radius of oscillations (waves) and increasing their frequency.
Hence decreases the length of the body

Equally  increases its energy and mass

The final formula for maximon (Plank mass) looks

   M2=h2/c2*lp2*(1-v2/c2)

For other particles instead of lp substituted size brane

http://en.wikipedia.org/wiki/Special_relativity

http://en.wikipedia.org/wiki/Superstring_theory