so I would like to debrief with you
homework assignment number one I have
good and bad things to say about this
homework assignment and the work you did
over there first let me begin by saying
how super happy I am
it's really humbling and I hope I'm up
to that and that Iwill keep giving you motivating things
to do in the coming semester let
me start with bad things I have to say
about your work and then I will move on
to the congratulations my main
criticism with students in this homework
assignment is regarding the complaints I
received by email about the grades that you receive ten people have contacted me
overall asking me to review their paper
which takes a lot of time and a lot of
energy
most of the complaints go this way I
receive an email that says "well peer
number one need a pretty good job got
almost all the points I wanted but peeeer
number two oh this mean heartless
person look they removed half a point
in this question I only received one
and I should have received one and a
half Olivier I know you are very busy
with all the work you do but you must
restore justice and restore the hope and
the faith of an entire generation by
making this awful wrong right please
review this paper and give me alllll the points I deserve"
well I won't tell you what I think about
this I will just give you hard facts the
hard facts are that among the ten people
who contacted me - two received
respectively 2 and 2.75 points more this
is because the peers are human
and as humans they are like you and me
they live interesting and complicated
lives some peers are heartbroken because
they broke up with their partner the
previous day or some peers are grading
you while they feed the baby and so it
happens and I'm here for this I'm happy
to fix those kinds of errors this is my role so
do contact me if you believe this is what happens but the eight
other peers end up having their grades
bumped up by an average of 0.3 point out
of 10 0.3 point out of 10 this is not
much because there are four assignments
and out of those four times the average
counts up for half of the final grade
and so I ended up spending an entire
afternoon and late into the
evening grading all those papers
and communicating with you only to bump
up the average grade of 8 percent of the
class by an average 0.3 percent so we
have to ask ourselves here what we're
doing and how reasonable this really is
and what I could do with this time
instead for another 150 people instead
of just a few individuals and so I ask
you I implore you before you email me to
complain about your grades to calculate
how much you realistically will obtain
with a review from me and to consider
carefully whether you are reacting
rationally to a series of facts or
whether it is mostly the emotion the
disappointment or the anger that is
talking through your email be very
careful with this okay this is for the
complaints now about the
congratulations I said the months ago
that it was a little prize for the best
paper in each of the best paper or best
here grade grading and so here is the
winner for this time is Peeyush and Peeyush
wrote a superb paper very very neat not
too long with lots of short and clear
explanations and especially what we very
much appreciated
very very nice distinction between the
general expression theory, the numbers
put in, and then the final result this
makes it very easy to grade it turns out
everything is correct but if it was
incorrect then it would be very easy to
find out where exactly the mistakes come
from because of that easy to see and easy to debug layout so congratulations Peeyush
now we have a little prize I initially
thought I was going to offer a book as a prize
because who doesn't like to receive a
good fluid dynamics book so this is my
very favourite book of course in fluid
dynamics this is Hydrodynamica by Daniel
Bernoulli it was originally published in
1738 and here's the English translation
from 1960 of the whole book wonderful
present and I thought it would be good
to offer this to the best student the
best contributor every homework
assignment but then I thought what if
the students have the book already
and what disappointment this would be so
I changed my mind
instead of this we settled on having the
little prize of 20 euros of Amazon voucher
which you can spend on Amazon Amazon is
a very big website which is very
well-known because so many books
about fluid mechanics are available on
there so I'm sure Peeyush you will find
a good use for those 20 euros and
again there are another three times this
prize for the three upcoming homework
assignments so congratulations and for
the next assignment we will probably be
looking instead of instead of looking at
the papers we will probably be looking
at the gradings for for the homework so
how well and how constructive and how
helpful the gradings are
this by the way is not my selection the
money is mine but the selection is done
by my colleague Jochen and Jochen was a
student last year in this program so he
doesn't just have the experience of the
teacher and instructor this year but he
also has experience of having graded and
having being graded by peers last year
and so I think this is a really good
perspective that he can give when he
picks out the best contribution every
time all right
overall what to look for in the next
homework assignment well next assignment
we calculate force on a panel on a flat
panel and there are three things I would
like you to pay attention on the first
thing was not such a great success in
the first assignment it is the vector
notation the vector notation is very
important in fluid mechanics and will get
more important as we progress through
the chapters when you write a vector
equation it is a symbol where either an
arrow on top or usually n bar on the on
the bottom I don't care how you write it
when you write a vector is equal to
something that something must either be
other vectors or it must have two or
three dimensions a vector has more than
one dimension this is a fundamental
property of it if you write a vector is
equal to 12 Newtons this is
inherently wrong vector the length of
that vector would be the vector without
the arrow or without the bar and this is
correct we express the length of that
vector but if you keep the bar or the
arrow on the symbol and so you express a
vector then you need to have either
vectors or two or three lines on the
other side of the equation so pay a lot
of attention to this this is extremely
important for us in fluid mechanics
second thing is the clarity of the
layout of the papers too many of you
sent papers which honestly I'm if I was
to receive them from my colleagues or I know
for a fact if my colleagues were to
receive them from me then this would not
work at all
and they would just send it back
to me and say "Olivier just redo the work please I don't have time
to read through this. pay attention to how easy it
is to follow the thread of your
calculations by aligning the equal sign
pay attention to clarity of the results
don't make it so that your peers wonder
whether this is zero or a point where the
decimal separator is make it very clear
and very easy to read it is our
experience from last year that the
expectations of peers grow with time
with respect to clarity and so if you
don't want to lose marks on this pay
attention and conversely when you are
grading your peers I encourage you to be
severe with the presentation and the
cleanliness of the papers that you
receive and third thing is the same
advice as I gave last time which is
having very nice and clear separation
between the general expression theory
the number application and the final
results and this enables your peers to
quickly estimate and find where the
error is and it makes our job a lot
easier
your just read through your paper and
you say yes yes no yes yes done and so
this is exactly what you want to
generate for your peers, a quick and easy
review separate those three things as
clearly as you can right so overall I'm
super happy with the energy that you put
in this I am super happy with the
quality of the work that you submit
overall and I'm super happy with the
quality of the reviews that you do as peers
congratulations keep up the hard work
I hope you're hanging in there and I
will see you next time. Bye-bye.
