1. Design a clock generator using a 555 timer with a frequency
of 1 Hz (any duty cycle is OK). Use resistor values between 1k and
1M and use capacitor values available in lab (see table in
“Pinouts.doc available on course Canvas site). Show your
calculations for RA, RB, and C. Clearly show all formulas and
calculations and state when you are arbitrarily picking a value.
(DONE)
2. Select the nearest standard 5% resistor values to the values
for RA...
7-
a) What components determine the frequency of an astable, 555
oscillator? Draw the circuit.
b) Draw a circuit for both an astable and a monostable, 555
multivibrator.
c) What is the duty cycle and percentage duty cycle of a pulse
train or square wave?
d) What is the overshoot, rise time, fall time, and pulse width
of a pulse and where on the waveform is each measured?
What is a reasonable web hosting configuration? Draw/picture a
typical configuration. Give any two reasons why is it a reasonable
configurations?
Scalable cloud-based hosting is reasonable.
What is web cache? How a web cache work? Give an example of how
a web cache can assist a web portal (considering any busy website,
explain how caching can improve its performance)
(IT/E-Portals Development)
(a) Describe the principle of operation of
(i) Klystron amplifier
(ii) Travelling wave tube (TWT) amplifier.(b) A parabolic reflector is used to receive a satellite signal
of 4 GHz. If the beamwidth of the device is 2.50(i) find the diameter of the parabolic reflector.
(ii) calculate the gain of the device assuming that the efficiency
factor is 50%
1. Draw the peptide DCTEVKKR at a ph 7.4 in the trans
configuration.
2. Consider the peptide from #1 for the questions
below.
Calculate the pI of the above peptide. (I recommend showing your
work – you can attach it on a separate sheet of paper or insert
pictures).
3. Based on it’s sequence of amino acids and the answer to (2)
above, suggest a possible function for the peptide.
4.What interactions would contribute most to tertiary structure?
Explain your...