2. A digital signal processing system with analog audio signal
input in the range of 0-20 Khz uses oversampling techniques and a
second order sigma delta modulator to convert the analog signal
into a digital bit stream at a rate of 3.072 Mhz.
i) Explain how the digital bit stream may be converted in to a
digital multibit stream for x(n).
ii) Determine the overall improvement in signal to quantization
noise ratio made possible by oversampling and noise shaping and...
4. i) An input signal of an LTI system is assumed to be a
rectangular pulse sequence x[n] of length 2L samples. Represent
x[n] in terms of a unit step sequence and sketch x[n] if it turns
on at n=0.
ii) Suppose the impulse response of the system is also a
rectangular pulse sequence h[n] of length L samples. Represent h[n]
in terms of a unit step sequence and sketch h[n] if it turns on at
n=0.
iii) Determine the...
Which part of the following descriptions of a compound or
element refers to its physical properties and which to its chemical
properties?
(a) Calcium carbonate is a white solid with a density of 2.71
g/cm^3. It reacts readily with an acid to produce gaseous carbon
dioxide.
(b) Gray powdered zinc metal reacts with purple iodine to give a
white compound.
Describe the key properties of a signal sequence (or leader
sequence or leader peptide). Explain the roles of these properties
in guiding proteins across the cytoplasmic membrane. .
A complex function is called Hermitian, if its real part is even
and its imaginary part is odd. Prove Fourier transform of a real
function is Hermitian.
Describe the characteristics of visible light, and explain the
process by which the eye converts light energy into neural
messages. Explain how the Young-Helmholtz theory helps us
understand color vision.
Which of the following characteristics are part of the
parasympathetic nervous system and which are part of the
sympathetic nervous system? Also indicate if they are found in both
systems: Long preganglionic fibers Innervates the smooth muscle
of
blood vessels
Collateral ganglia
Terminal ganglia
1.Describe the followings:
A. The 2 types of immunosuppression?
B. which part of the immune system is responsible for rejection in
organ transplant?
C. why does tissue damage occurs in acute rejection after organ
transplantation?
2. MHC System
2.1 What is MHC polymorphism?
2.2 Why is it so important?
2.3 Why MHC is called HLA?
2.4 What are the function of MHC I and MHC II?
3. How to B and T cells differ with respect to antigens that they...