In _____, the audio and video information isshown from the presenter to participants.
a. screen sharing
b. network sharing
c. Webcasting
d. podcasting
c. Webcasting
Web conferencing uses information technology to conduct meetings or presentations in which participants are connected via the Internet. Another form of Web conferencing is Webcasting, in which audio and video information is broadcast from the presenter to participants.
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A sequence of plaintext elements is replaced by a __________ of that sequence which means that no elements are added, deleted or replaced in the sequence, but rather the order in which the elements appear in the sequence is changed.
A) ?permutation B) ?diffusion ? C) ?stream ? D) ?substitution
Find the closed-form solution for the denoised signal ?f for both the weight matrix–based and the Laplacian-based frameworks. Note that only the expression for S 2 ( f) is different in each framework. Hint: Take the derivative with respect to f and equate to zero.
This problem is about graph signal denoising via regularization. Usually the measurements
are corrupted by noise, and the task of graph signal denoising is to recover the true graph
signal from noisy measurements. Consider a noisy graph signal measurement
where
f is the true graph signal and
n is the noise signal. The goal is to recover original signal
f from noisy measurements
y. In the classical signal processing, discrete-time signals and
digital images are denoised via regularization, where the regularization term usually enforces
smoothness. Similarly, a graph signal denoising task can be formulated as the following
optimization problem:
where S2(f) is 2-Dirichlet form as given by Equation (10.5.16) and ? is
What is a danger of becoming very comfortable with the tools and techniques of lighting?
What will be an ideal response?
Which of the following protocols uses port 143 by default?
A. NTP B. SNMP C. SSH D. IMAP4