In general, the stiffness and surface density
were the main factors that affect the soundproofing efficiency of single plates.
The characteristics of the tested fabrics were determined according the standards: the thread density according to LST EN 1049-2 , linear density and surface density
according to LST ISO 3801 , and the thickness of the material according to LST EN ISO 5084 .
where [D.sub.2n], [D.sub.1n] are the normal components of the electric displacement vector: [D.sub.2n] = [[epsilon].sub.0][[epsilon].sub.2] [E.sub.2n], [D.sub.1n] = [[epsilon].sub.0][[epsilon].sub.1] [E.sub.1n] [epsilon].sub.0] = 8.85 [10.sup.-12] F/m is the electric constant; [[epsilon].sub.1], [[epsilon].sub.2] are the dielectric permeabilities of dielectrics, a is the surface density
of electric charges; [E.sub.1n], [E.sub.2n] are the normal, [E.sub.1t], [E.sub.2t] are the tangential components of the electric field strength vector of the first and the second dielectrics, respectively.
Like in the case of GaN NWs, the surface density
of the InN NWs arrays is pretty high.
The surface density
was determined by using a surface density
model without any additional characterization instrument (e.g., Brunauer-Emmett-Teller (BET) measurement).
To understand star formation in galaxies, the relations between star formation rate surface density
[SIGMA] SFR and gas surface density
[SIGMA] gas must be determined.
The TEM image shows the Au NPs with the diameter D = 2.3 [+ or -] 0.4 nm and with the average surface density
[N.sub.s] [approximately equal to] 7.3 x [10.sup.12] [cm.sup.-2] to be confined almost in a single sheet in the middle of the dielectric film within a thin layer of ~10 nm thickness.
Therefore, the partition function for the random walk of an electrostatic field generated by means of 2N static parallel randomly charged planes where half of them have a charge surface density
[sigma] = 1/A and the other half has a charge surface density
[sigma] = -1 / A is given by
Four different individual membranes were manufactured with a varying surface density
in grams per square meter (GSM) to be 6, 10, 25, and 40 g[m.sup.-2], designated as PUR06, PUR10, PUR25, and PUR40.