Question

Give an example of a control system with a single state variable. Then, add up to two more state variables, one at a time. Describe how the control system changes (additional sensors, feedback, etc.).

Answer #1

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1.6 The human body contains numerous feedback control loops that
are essential for regulating key physiological variables. For
example, body temperature in a healthy person must be closely
regulated within a narrow range. 1. Briefly describe one or more
ways in which body temperature is regulated by the body using
feedback control. 2. Briefly describe a feedback control system for
the regulation of another important physiological variable.

Homeostatic systems maintain a steady-state set point
over time using negative feedback. Which one of the following
statement is NOT TRUE for stability of metabolic
system:
Select one:
a. Metabolic systems that oscillate must have multiple control
variables
b. Step changes in a controlled variable will return the system
to its original state using negative feedback
c. Perturbations from steady state, either positive or negative,
result in recovery reactions that return the system to its original
state
d. A positive...

PLEASE GIVE THE FULL DETAILS OF THE STEPS ON EACH
QUESTIONS SO I COULD FOLLOW UP YOUR WHOLE
EXPLANATIONS.
PLEASE WRITE THE STEPS ON SOLVING THIS
EXAMPLE
EX) STEP 1, STEP 2, ETC
HANDWRITING IS OKAY AS LONG AS IT IS
READABLE.
IF YOU HAVE USED THE EQUATIONS OR CONCEPTS, PLEASE STATE
IT CLEARLY WHICH ONE YOU HAVE YOU USED SO I COULD FULLY UNDERSTAND
THE DETAILS OF THE STEPS YOU HAVE DONE.
PLEASE DO NOT OMIT THE DETAILS OF...

Choose two (2) barriers to entry for a single-price monopolist,
give an example of each, and explain how they serve as a barrier to
entry for other firms. Answers should be no more than 1 page.
(25)

3. Give an example to state the null hypothesis.
4. Assume a trial involves two independent tests. What is the
complementary event of the event that we would reject one or more
of the two null hypotheses?
5. Assume a trial involves two independent tests. Each test is
declared statistically significant if p value <0.05. If H0 is
true, what is the probability that we would reject one or more of
the two null hypotheses?

Suppose a null model is applied to describe the relation of two
random variables, you may add one more variable into the model as a
predictor, and that would be the second model.
a. Draw two scatter plots to illustrate the fitting of the two
models, which can show simple regression has a better fitting.
b. Tell how the R^2 changes and how adjusted R^2 change.
c. Write an estimator of the coefficient of the null model.

A young entrepreneur, with limited financial resources, is
planning to sell a line of nutritional supplements (pills and
powders containing vitamins, protein, fiber, etc.) to consumers
through the use of direct marketing. (a) Describe direct marketing
in a way that distinguishes it from direct selling and from other
forms of retailing. Give an example of a company that primarily
practices direct marketing. Then, describe one of the seven
consumer needs expected of retailers that is satisfied particularly
well by direct...

For each part below, give an example of a linear system of
three equations in three variables that has the
given property. in each case, explain how you got your answer,
possibly using sketches.
(a) has no solutions
(b) has exactly one solution which is (1, 2, 3).
(c) any point of the line given parametrically be (x, y, z) = (s
− 2, 1 + 2s, s) is a solution and nothing else is.
(d) any point of the...

In the 1974 paper The UNIX Time-Sharing System, Dennis Ritchie
and Ken Thompson of Bell Laboratories describe the original
implementation of forking processes as follows: Except while UNIX
is bootstrapping itself into operation, a new process can come into
existence only by use of the fork system call: processid =
fork(label) When fork is executed by a process, it splits into two
independently executing processes. The two processes have
independent copies of the original core image, and share any open...

Attention deficit disorder (ADD) is a syndrome in which a person
has difficulty focusing sustained attention on a task for a
significant amount of time. In some cases this is accompanied by
hyperactivity as well. It is currently being diagnosed at an
all-time high. Between 1989 and 1996, youth visits for ADD
increased 90%, from 1.9% of total physician visits to 3.6%. Now, a
psychiatrist named Dr. Edward Hallowell is making a new
distinction. He has described a similar set...

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