Waching daily Mar 7 2018

I have, of late, spent a fair amount of time thinking about sarcopenia. No it is

not a sexual dysfunction. Get your mind out of the gutter i'm aaron freeman and

Excitable Ape with another dose of sciencey optimism. Sarcopenia is the

loss of muscle mass that is an inevitable party favor of achieving

antiquity measuring muscle mass is a tricky business even if you spend way

too heck too much time in the gym not long ago climatologist dr. Melissa

Everett Thompson gave a talk for the Chicago Council on science and

technology of which I am the proud artist-in-residence

prior to her c2 st presentation she and I chatted about muscle mass in humans

and chimpanzees many of my gym rat pals pop creatine supplements and we talked

about the energetic sting if you were worried about muscle loss let's say you

had you know if you had cancer or something like that you might go to a

doctor and have 24-hour creatinine tests so basically the gold standard for

assessing muscle mass in human clinical settings is to collect all of your urine

for 24 hours and assess creatinine brannon is a metabolite of creatine in

your muscle so so each little muscle cell has the creatine it kind of

evaporates at a very steady rate and your doctor would take 24 hours worth of

urine and assess that we can't do that so we collect samples as we can get them

and we can assess the basically how dilute a urine sample is and compare the

amount of creatinine to the dilute nough severan and the more muscular an animal

is the higher the ratio of creatinine it's really changed what we can do

that's it's been a limitation for these kinds of studies where you want to know

how does energetic condition affect things like reproduction and competitive

success and all that stuff and if you can't weigh your animals you're guessing

and a lot of people have done that a lot of people have made visual estimations

she's looking fat today you know on a one to five scale

that is this animal that's pretty difficult to rely on so we have the

creatinine measure and then we have a measure of insulin production that we

can get from urine which tells us about how many more calories are there

consuming than they're expending so with those two in a hand we're getting a

better picture of how well individual animals are doing you know when I sent

you the email after watching you on YouTube I said doc you rock and let me

just say I'm sitting here talking to you a little while doc you rock even more

I'm so grateful doctor Melissa every time soon thank you so so much thank you

so much I enjoyed meeting it Thank You immensely much for watching beloved

siblings you make a brother feel strong I make new sciency optimistic videos

every Monday through Friday if you enjoyed this one please like subscribe

to the YouTube channel and share with someone you know who might themselves

enjoy some sciency optimism I also hope you will visit c2st dot org and

check out the latest from the Chicago Council on Science and Technology. I

guarantee you will find something to tickle your intellectual fancy, because

science is for everyone! I am Aaron Freeman I am an excitable ape and I hope

your brain muscles bulge as you continue to science the day!

For more infomation >> How to tell if your Chimpanzee is fit - Duration: 3:31.

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Justin Hartley talks about 'This Is Us' and his recent marriage - Duration: 3:48.

For more infomation >> Justin Hartley talks about 'This Is Us' and his recent marriage - Duration: 3:48.

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What is an Operating System - Duration: 8:35.

so far we have seen that the size of the hard disk will be much bigger than the

size of the RAM okay ...now let us assume that just for an assumption our hard

disk can hold 500 programs okay... similarly let's assume that our RAM can

hold 50 programs why because size of a RAM will generally be lesser than

that of the size of the hard disk fine... now out of these 500 programs which

which are present inside the hard disk 50 programs should be copied from the

hard disk and then moved into the RAM okay... it is copy it like this just like

copy paste okay it is not like cut paste which we do in computer ok ...this 50

programs which I am moving into the RAM should also be present inside the hard

disk okay... such a way I copy the 50 programs and place it in the RAM... now my

question is ...out of this 500 programs which 50 programs should be copied from

the hard disk into the RAM that is the question okay... see for that what we can

do is the best idea is we can move the 50 programs which the CPU is most likely

to request next ...right..? why ..? because if the CPU is requesting for a program which is

present inside the RAM it takes very less time for the CPU to access it whereas

in case if the program with CPU is trying to access in the RAM is not present when

in case the CPU is trying to access a program which is not present in the RAM

it is going to take lot of time because we need to copy from the hard disk and

then place it in the RAM and then we might have to take it from there RAM it

is going to take lot of time so we should try to move the 50 programs

which the CPU can request next from hard disk to memory ok ...but the problem here

is...we will never be able to say which program will the CPU be requesting next

okay ... why ? because whatever CPU can request is

highly variable we cannot really predict for example as a user I can actually ...

I can actually open any software as I like

right ...nobody can say is that I will open a software only this because it is

a future... similarly our CPU cannot predict our CPU can actually request for CPU can

actually request for any program ok... there is no nothing like our CPU should request

this program so this is a future and it is not possible for anyone to

actually derive it exactly so one thing we can do is we can do prediction or we

can go for a guess ok we can simply say that we can simply put some program from

hard disk to memory some 50 programs based on some algorithm or some idea ok

see why do we need an algorithm for this see what I can do for example there are

two teams which are playing a match ok TEAM A and TEAM B now they are going to play

the match tomorrow and you want to predict the winner ok now you can

predict the winner based on various algorithms for example you can take the

past history and see which team has won the most number of matches and say that

he will be the winner tomorrow ok your guess might be correct or might not be

correct one you will know it only tomorrow similarly we can go with

another team which has lost most number of times but still you can say that that

team is playing in a ground which it has won all the matches so far so you can

say that the TEAM B can win the match ok so there are various kind of

algorithms so you can come up with you can come up with lot of algorithms

saying that this can be have this can happen or that can happen ok so this is

just a guess so .... similarly here also we can

move any 50 programs from hard disk to memory

based on various ideas saying that the program which is smallest in size may be

referred by the cpu in the future it is just an idea ok need not be correct

similarly the 50 programs which are the biggest in size can be referred by the

CPU next and so I need to move the 50 programs which are which is the biggest

in size from hard disk to memory so we can go for various kinds of guesses so

this guessing is done by something called as operating systems

okay our operating systems is a program it is a huge or a big program it will

have lot of functions inside it okay now one of the functions inside the

operating systems will hold the logic or algorithm which will say that which in

case if we come across a situation such that more than one program is trying to

access the capture the RAM here more than one program wants RAM right ..? but we

can move only a few programd into the RAM now which few programs we should move

from hard disk to RAM... that decision is being done being taken care by one of

the functions of operating systems similarly that might arise a situation

where let us assume there are more than one program in the RAM

let us assume there are two programs in the RAM which are trying to access the

CPU at the same time it is still definitely possible

why because I might actually open more than one program in my computer in that

case what will happen both the programs has to be has to be

executed by the CPU now it's up to the CPU to decide which program should it

execute next actually CPU will not decide CPU doesn't know anything other

than executing the program now it's up to us to decide which program should the

CPU executes next right among the two programs which are trying to access the

CPU now again for that we write another function inside our operating system

which will decide which among these two processes should capture the CPU okay so

what is actually happening here is it is nothing but resource allocation see what

is meant by resource anything which is present inside our computer is nothing

but a resource for example CPU is a resource Ram is a resource hard disk is

a resource mouse keyboard anything printer any device you can take in our

computer we can say that as the resource okay now in now what's happening here is

more than one program is trying to access the CPU and it's up to or

operating in and its operating system is deciding which among these two programs

should access the CPU using its program see operating systems

is a program now among this there are various functions and each function is

having a logic this function is having a logic saying that which among this two

programs should access the CPU similarly even here we are we have already seen

that whenever two programs are trying to access the RAM the operating system is

deciding which program should we should can get hold of the RAM which means

which program should be moved from hard disk to memory again this is being

decided by our operating systems so what operating systems is generally doing is

it is taking care of something called as resource allocation which means if more

than one program is trying to access a resource now operating system might have

to decide which one should get hold of the resource first see offcourse every

program will every program will definitely get hold of the resource at

some point in time that's for sure now among them which one should capture the

resource first that is our question and that is being answered by our operating

systems okay fine so the the important point which you

might have to note here is operating system is nothing but a program which

acts as a resource allocator or a resource manager okay that is the only

point which for this that is what I wanted to explain so I went for lot of

explanations just to give a rough idea of what is happening with the computer

so in case if you are not able to understand these points it is still fine

try to get a rough idea about it because we are going to see all these concepts

in a much more detailed way okay this is just a rough idea okay nothing nothing

that you should be able to understand it exactly

so try to get a rough idea about these points we are going to see all these

points in a very detailed way with lot of problem solving a lot of problems ok

you will get it very clearly so fine

For more infomation >> What is an Operating System - Duration: 8:35.

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Ripple Effect Potential - What is it and how does it measure future growht - Duration: 2:02.

Hi I'm Jeremy Shepherd and I'm talking about Ripple Effect Potential.

This is one of the indicators we use in our research to help uncover top growth locations

for our clients to invest in.

Capital growth usually starts at city centers, and then it flows out to the middle rings,

before eventually out to the fringe suburbs, much like ripples on a pond flow out from

where the stone was dropped.

In the middle of the pond, the concept is based on affordability.

It goes something like this: when prices become too expensive, people look for the next nearest

suburb, and it may be much more appealing because it's so much cheaper, and that's how

the growth starts to ripple outwards.

That's why at the end of a boom cycle you'll find outer areas still experiencing good growth,

while the city centers are much more subdued.

Rather than try to guess where the Ripple Effect is going to take place, or subjectively

analyse it, we try to objectively score it.

For example: let's say neighboring markets have had average growth over the last 12 months,

around 10%, and our subject market has only had 3% over the same period — there's a

7% growth differential there, and that is approximately what the Ripple Effect Potential

would be.

We would expect 7% growth to occur in order to balance these markets out.

Now, it's not exactly like that — there are few more complications.

For example: we use a weighted average of the distance between these suburbs and our

target suburb — but that's just the basic concept of the Ripple Effect Potential.

We use this in our analysis, but it's not the only indicator we use.

If you're interested in learning more about our indicators, you can check out our research

page.

Thanks very much for watching and as always feel free to leave comments below: