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In the manufacture of rubber products, the blending of rubber produces new materials
with a wide range of applications because they have the potential to combine the striking
properties of both the constituents in the blend. In the first article,
"Thermal Characterization and Surface Morphology of Natural Rubber (NR)/Nitrile Butadiene
Rubber (NBR) Blend", A Kala evaluated the thermal properties such as stability, degradation and
glass transition temperature of Natural Rubber (NR) blended with Nitrile Butadiene Rubber
(NBR). Scanning Electron Microscopy (SEM) was used to study the surface morphology of
NR/NBR blend. Thermogravimetric Analysis (TGA) revealed that the newly blended rubber material
is useful for a variety of high temperature applications.
In recent years, three most popular approaches to quantization of gravity and
unified and nonlinear theories in physics were developed: the String/M Theory (SMT),
Geometric Quantization and Deformation Quantization (DQ) and Loop Quantum Gravity (LQG). The aim
of the article, "Loop Quantum Gravity in Ashtekar and Lagrange-Finsler Variables and
Fedosov Quantization of General Relativity", by Sergiu I Vacaru was to give a self-contained
and comparative analysis of the two existing general approaches to quantization of
General Relativity (GR), the LQG and DQ, and to construct a `bridge' between these two
quantum gravity theories. The author proved that the classical Einstein theory can be
reformulated equivalently as an almost Kähler geometry if the (pseudo) Riemannian space-time is
enabled with a formal (2+2)-dimensional nonholonomic distribution.
In the article, "Scale Invariant Theory of Gravitation in Non-Diagonal Bianchi Type II
Space-Time", Bivudutta Mishra investigated the Bianchi type II cosmological model in
Wesson's scale invariant theory of gravitation, when the source of the matter field is a perfect
fluid. It was found that the perfect fluid does not survive and Bianchi type II space-time turns
out to be flat in this theory.
General relativity and quantum theory have profoundly changed our view of the
world. Both theories have been verified to extraordinary accuracy in the last several decades.
LQG takes this novel view of the world seriously by incorporating the notions of space and
time from GR directly into quantum field theory. The resultant theory is radically different
from the conventional quantum field theory. It provides a precise mathematical picture of
the quantum space and time. In the article, "Time is Derived from Motion", Amrit S Sorli,
expressed that there is no experimental evidence whatsoever to support the view that
space-time exists as the basis of fundamental physical reality. Clocks are macroscopic measuring
devices which accumulate local internal motion, and we can record a sequencing of that motion
and the changes that occur in space. But we can find no evidence to support the existence
of space-time as a fundamental entity. Accordingly, the author concluded that we live in
a timeless and temporal universe of space and motion where the past and future exist only
in the human mind.
The mass and binding energy of atomic nuclei are keys to the understanding of
many physical processes. Due to this, it is important to construct a reliable theoretical model
for the values of the nuclear mass and binding energy of nucleus as a function of mass A
and atomic number Z. In their article, "Binding Energy of Nucleus Using Few-Body Interactions",
M R Pahlavani, R Morad J and F Mojrian constructed an approach that is able to calculate
the binding energy of nuclei. This method is not only used for the known stable nuclei mass,
but also for the nuclei far from stability. Binding energies of some nuclei have been
calculated and compared with the related experimental data and good accuracy has been obtained.
-- BVVSN Prabhakara Rao
Consulting Editor | 
