State what the following terms mean and describe briefly how they improve safety in railway signalling:
(i) Block
(ii) Distant Signal
(iii) Overlap
(iv) Track Circuit
(v) Axle Counter
In: Civil Engineering
Regarding the case on IBM Watson, watch the video in below and discuss your thoughts regarding the use of Artificial intelligence (AI) in healthcare. Pros? cons? concerns? timeline?
https://www.youtube.com/watch?v=cxJxXcxF8NY
In: Psychology
Derive a relation between velocity in rad ial direction v(r) and centerline velocity vc for a fully developed laminar flow inside a horizontal pipe with a head loss h1 for a pipe length L.
In: Civil Engineering
Marriage and the Family (AChristian perspective) by Stephen Grunlan
Please watch the video and give your perspective and points of intrest in 200 words. Link is provided below.
YouTube URL:http://www.youtube.com/watch?v=AptieDqNKEc
In: Psychology
Sketch the I-V characteristics of a diode. Why does the current saturate at high plate voltages?
Sketch the current voltage characteristics of a triode.
Briefly explain how a triode can amplify ac signals.
In: Electrical Engineering
Let En be the subspace of V (n, 2) consisting of all vectros of even weight.
(a) What are the parameters [n, k, d] of En.
(b) Write down a generator matrix for En in standard form
In: Advanced Math
The density of helium is 7 times smaller than air. For any gas, the speed of sound is given by v= (Pressure/Gas Density) ^1/2. If the pressure is kept the same, what is the speed of sound in helium?
In: Physics
A particle is found to carry the kinetic energy, K=(γ−1)mc2, which is equal to the energy of a photon. If the speed of the particle is v=0.500c, find the ratio of the wavelength of the photon to the de Broglie wavelength of the particle.
In: Physics
As part of the requirements by the university for an
academic degree, final year students
are required to undertake a research and write a report called a
dissertation. Unfortunately,
some students joined at the very last part of the semester and
hence missed the introductory and foundation lectures. One of them
approached you for assistance on what research is about and to
deepen his/ her knowledge on the following issues. Briefly help
this new
student on these to be able to also carry out a successful and
sound research;
a. The definition of research. Briefly explain to him/her.
b. Any two occasions on which the term research is wrongly used
according to
Walliman (2005).
c. The processes that he/she must go through to successfully carry
out a sound
research.
d. Any two qualities of a quality research
e. Any three qualities that he /she should exhibit if he/she
desires to be a quality
researcher.
f. The five common mistakes that researchers make; just list
them.
g. Given that the student is also the manager of a firm, inform him
on when a business
research should be conducted.
2. Indicate whether the following statements are true or not true
and justify your response;
a. The sole purpose of research is to solve a problem.
b. Research Methodology and Research Methods mean and imply the
same thing.
c. Systematic sampling involves choosing respondents based on
reason that the
respondents sampled gives you the right information.
d. It is the research problem and questions that drives the title
but not the reverse.
3. Past research indicates important gender differences in the use
of networks (Hanson and
Blake 2009), and suggests that male SME owners are more likely to
successfully network
and benefit from networks-driven performance in contrast to female
SME owners (Watson 2012). In particular, as many women come to
self-employment from domestic or nonmanagement
background (Cromie and Birley 1992), and thus are likely to have
previously
In: Economics
Two types of survey questions are open questions and closed questions. An open question allows for any kind of response; a closed question allows for only a fixed response. An open question and a closed question with its possible choices are given below. List the advantages and disadvantages of each question.
Open question: What can be done to get students to eat healthier foods?
Closed question: How would you get students to eat healthier foods?
1. Mandatory nutrition course
2. Offer only healthy foods in the cafeteria and remove unhealthy foods
3. Offer more healthy foods in the cafeteria and raise the prices on unhealthy foods
What are the advantages of an open question? Select all that apply.
A.
An open question allows for new solutions to be introduced.
B.
It is easy to compare the results of surveys with open questions.
C.
It is easy to quantify the responses of open questions.
D.
An open question allows the respondent to go in-depth with their answer.
What are the disadvantages of an open question? Select all that apply.
A.
It is difficult to quantify the responses of open questions.
B.
An open question limits the possible responses of the respondent.
C.
It is difficult to compare the results of surveys with open questions.
D.
The form of the question may influence the opinion of the respondent.
What are the advantages of a closed question? Select all that apply.
A.
It is easy to quantify and compare the results of surveys with closed questions.
B.
Closed questions allow the respondent to go in-depth with their answers.
C.
Closed questions allow for new solutions to be introduced.
D.
It is possible to automate the collection of results for closed questions.
What are the disadvantages of a closed question? Select all that apply.
A.
The form of the question may influence the opinion of the respondent.
B.
Closed questions allow for new solutions to be introduced.
C.
Closed questions may not provide appropriate alternative responses.
D.
It is difficult to quantify and compare the results of surveys with closed questions.
In: Statistics and Probability