A binary message m, where m is equal either to 0 or to 1, is
sent over an information channel. Assume that if m = 0, the value s
= −1.5 is sent, and if m = 1, the value s = 1.5 is sent. The value
received is X, where X = s + E, and E ∼ N(0, 0.66). If X ≤ 0.5,
then the receiver concludes that m = 0, and if X > 0.5, then the...
When a message is sent electronically it is usually sent as a
stream of bits, each of which can be either a 0 or a 1. If the
digital channel is noisy then each
bit has some probability of being flipped (ie changed from a 0 to a
1 or vice versa) resulting in a corrupted message.
Assume that a message is being sent through a noisy channel where
the probability that any individual bit will be flipped is 0.1....
Let M(x, y) be "x has sent y an e-mail message" and T(x, y) be "
x has telephoned y, " where the domain consists of all students in
your class. Use quantifiers to express each of these
statements.
g. There is a student in your class who sent every one else in
your class an email message.
I answer ∃x( x ≠ y ∧ ∀? M (x, y) )
But answer on text book is ∃x( x ≠ y → ∀?...
<Bit Stuffing Question>
a) The following message is to be sent by a host running a protocol
with starting and ending flags
and bit stuffing. The starting and ending flags are both 01111110
and they have not yet been
added.
0111111011111011110011111100111111000000111110101111110
What is the message actually sent (after bit stuffing and after
adding the starting and ending flags)?
b) Suppose the bit pattern shown above is received by a host
running the bit stuffing protocol.
That is, this is the...
For each of the following scenarios, identify the nonverbal
message being sent and indicate if the sender and/or receiver
should handle the matter differently:
While you are talking to a client, she starts drumming her
fingers on her desk.
You are a new employee attending your first group meeting. When
a man arrives after the meeting has started, others stand up to
offer him a chair.
When you make a suggestion at a group meeting, a colleague
rolls her eyes....
On September 1st, Facebook sent a message to all of its users
saying that all registered users as of September 5th will be
entered into a contest, to be selected at random, to win an
all-expense-paid two-week vacation to Fiji. Teresa is a registered
Facebook user-- she received and read the message. A week later,
Facebook notified Teresa that she won the trip. That night, Teresa
celebrated her good fortune by buying ten of her friends a round of
drinks...
(ElGamal encryption): show how, given an encrypted message
C1=E(m), it is possible to create a different encrypted copy that
will be decrypted to the same message without knowing the key that
was used for the encryption.
meaning, create C2 so that D(C2)=m
Have you ever sent a text message that revealed your most
intimate of thoughts and emotions? Text messages are
often raw, unvarnished, and immediate, not to mention can be taken
completely out of context. However, we send them to those who are
expected to guard them from publication.
The status of text messages in criminal investigations remains
unsettled in the US. Is it reasonable for people to expect the
contents of their electronic text messages to remain private,
especially from law...
A sample of 0.105 M CH3CO2H is titrated with 0.125 M KOH. What
is the appropriate pH of the resulting solution when the
equivalence point is reached? Ka= 1.8 x 10^-5