Children Play Fun Kitchen Games Cooking Kids!Baby Kids Learn Cooking!Wedding Tea Party
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BRX PLC Interrupts - Part 4: Loose Ends - Duration: 3:14.
In the first three videos on Interrupt Service Routines - or ISRs - we set everything up
using the dashboard because it is so quick and easy.
The cool thing about the Do-more is you can configure interrupts in your ladder code so
you can configure interrupts anytime you want.
You do that with the INTCONFIG instruction.
Look you can do all the same stuff we did via the Dashboard right here.
Set up event interrupts; timer interrupts and registers matching interrupts.
Exactly what we did before, but now you can setup and change interrupts whenever you want
while the PLC is running.
And you can inhibit any individual interrupt programmatically by simply toggling the ISR's
inhibit bit.
If you want to get rid of an interrupt event – or de-configure it, just use the De-configure
instruction and tell it which event you want to de-configure.
Easy.
You can also suspend and resume all interrupts.
Suppose you have a super critical process that simply can't be interrupted.
Well, you just put a Suspend at the start of the process and a Resume at the end and
interrupts will be suspended during that time.
This is also great for when you need to check the status of something and you don't want
anything to be changing while you are doing it.
Here are some loose ends not covered in the other ISR videos and a few things that are
worth repeating.
If you right click on an ISR you can change its name, and decide if you want the ISRs
data structure to be retentive or not.
That is, should the latency, execution time al l that stuff stick around after a power
cycle of the PLC.
You can also password protect the code block … but be careful.
If you do this and you forget the password, the only way to recover is to reset the PLC
back to factory default which means you will loose everything stored in the PLC.
Also, this ISR ID is assigned by the system so you don't have to worry about it – but
it is a remember that a Do-more BRX PLC allows up to 32 ISRs so the largest you will ever
see this number is 31.
Remember that the immediate output instructions are intended for use in interrupt service
routines.
You can use them in regular programs and tasks, but it is not a good idea because they take
time away from the scan and make debugging your Ladder code more difficult since they
don't follow the normal flow of a ladder program where the inputs are read at the start
of a scan, the ladder logic is executed, and then the outputs are updated at the end of
the scan.
And finally, PLEASE remember to keep your interrupt service routine as short as possible.
Why?
Because it interrupts the scan.
And if it is too long, it can interfere with the normal flow of your process.
Well, that should be more than enough to get you up and running with Interrupts.
Hopefully you can see that the Do-more BRX PLC allows you to quickly setup simple interrupts
from a single input, all the way up to complicated interrupt triggers based on multiple inputs,
dedicated hardware timers and even high speed input counters – all of which means once
again, the BRX PLC can pretty much cover whatever your project demands.
If you have any questions about the BRX PLC please contact AutomationDirect's free award
winning support team during regular business hours.
They'll be happy to help.
And don't forget the forums.
There are lots of folks there that love to share their years of experience.
Just don't post any questions directed at AutomationDirect's support team there – they
don't monitor the forums on a regular basis.
Spend Less.
Do more.
With AutomationDirect.
-------------------------------------------
How to Develop a Healthy Gut Ecosystem - Duration: 5:21.
"How to Develop a Healthy Gut Ecosystem"
As I've explored before, whether you're young or old,
male or female, smoker or non, high blood pressure, low blood pressure,
high cholesterol or low, having high levels of a toxic compound
called TMAO--trimethylamine oxide—
in one's blood stream is associated with a significantly higher risk
of having a heart attack, stroke, or dying over a 3 year period.
Where does TMAO come from?
The choline in foods like eggs can be turned by gut bacteria into TMAO,
which is then absorbed back into our system,
and the more eggs we eat the higher the levels climb.
Given the similarity in structure between carnitine and choline,
the same group of Cleveland Clinic researchers wondered
if carnitine, found in red meat, energy drinks, and supplements,
might also lead to TMAO production,
so they put it to the test.
If you feed someone a steak their TMAO levels shoot up.
Now this was someone who regularly ate meat.
Those who eat strictly plant-based
may start out with almost no TMAO in their system,
presumably because they're not eating any meat, eggs, or dairy,
but even if the vegan eats a sirloin almost no TMAO is made.
Why?
Presumably, they don't have steak-eating bacteria in their guts.
No TMAO is produced if you don't have TMAO producing bacteria in your gut.
If you don't regularly eat meat, then you're not fostering the growth
of the meat-eating microbes that produce TMAO.
This suggests that once we develop a plant-based gut ecosystem,
our bacteria will not produce TMAO
even if we eat meat every once in awhile.
However, we still don't know how rapidly gut bacteria shifts
after a shift in our diet,
but it does not appear to be all or nothing.
If you take men eating the standard American diet
and have them eat two sausage, egg, and cheese biscuits
before and after just 5 days of eating lots of high fat meals like that
you can boost TMAO production even higher.
So it's not just, do you have the bad bugs or not,
you can apparently breed more of them the more you feed them.
On the other hand, meat-free diets have been demonstrated
to have a profound influence on human metabolism.
You can analyze a urine sample and tell what kind of diet people eat
based on measurements like how low their TMAO levels are
in the urine of those eating egg-free vegetarian diets.
You can even take the same people and rotate them through 3 different diets
and you can tell who is who.
Who is on a high meat, low meat, or no meat diet,
in part based on the different compounds
churned out by the different gut flora or different flora activity
after just about two weeks on the different diets.
It's possible that some of the beneficial effects of whole plant foods
may be mediated by the effects they have on our gut bacteria.
At the same time, the standard American diet
may increase the relative abundance of undesirables
that produce toxic compounds including the cardiotoxicant TMAO.
Strictly plant-based diets have gained acceptance as a dietary strategy
for preventing and managing disease;
perhaps in part because of their rather unique gut flora,
less of the disease-causing bacteria and more of the protective species.
So all along we thought the reason those eating plant-based
had lower heart disease rates
was because they were eating less saturated fat and cholesterol,
but maybe their lower TMAO levels
may also be contributing to their benefits
thanks to the reduction of ingestion of carnitine and choline.
I talked about the egg industry response to the choline revelation.
How has the carnitine supplement industry reacted?
The former VP of Advocare, a multilevel marketing company
that sells carnitine supplements like "Slam"
while getting slammed with lawsuits, finding them for example
guilty of false, misleading or deceptive practices,
forced to pay over a million dollars
in response to the research implicating carnitine in TMAO production
he questioned whether there was a secret vegan conspiracy at the Cleveland Clinic.
Restricting our intake of meat or carnitine supplements
to prevent our gut bacteria from making TMAO, he argues,
"is like trying to prevent car accidents by restricting the sale of fuel."
Uh, OK, but there are benefits to transportation.
We're talking about TMAO,
which may be fueling our epidemic of heart disease,
the #1 killer of men and women in this country.
As far as I'm concerned, the more we can cut the fuel for that...
the better.
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🎮 Baby Kitty Supermarket Manager - Best Games for Kids HD | Fun Educational Kids Games - Duration: 15:06.
Baby Kitty Supermarket Manager - Best Games for Kids HD | Fun Educational Kids Games.
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BRX PLC Interrupts - Part 1: Quick Start - Duration: 5:50.
Interrupts are great for reacting to things when they actually happen.
Remember, normally a PLC reads the inputs, executes all of its logic and then updates
its outputs.
We call that a Scan.
So, what do you do if an input comes and goes during the scan, well, you'll miss it because
the PLC only reads at the signals the top of the scan.
Or maybe you need to respond to that signal right now and can't wait until the bottom
of the scan.
If you need to catch a fast signal or respond immediately to a signal, interrupts are the
answer.
Why?
Because once you setup the interrupt, it responds whenever the event occurs.
It literally tells the PLC to stop whatever it is doing and go do this right now.
It doesn't wait until the top of scan or the bottom of the scan to do something.
And the interrupt can occurat anytime during the scan.
And Do-more makes using interrupts really easy.
I've connected a simple pushbutton switch to input 0 on this Do-more BRX PLC so we'll
use that to trigger an interrupt.
In the dashboard I click on interrupts and let's assign event one to do respond to
this push button press.
Enable this interrupt and we want input 0 to be our trigger and let's look for the
rising edge.
We haven't defined the routine that is going to service this interrupt – we could have
done that over here if we had thought of it ahead of time – but this button right here
takes us to the exact same dialog.
Let's give it a name.
We call this an interrupt service routine, or ISR for short.
Do-more-Designer knows we want an ISR so we just hit CREATE.
The name gets automatically dropped in here and we're good to go.
This little equation says an ISR named ISR_EVENT1 will be executed when it sees the positive
going edge of X0.
It won't wait for top or bottom of scan, it will do it immediately.
Let's do a little experiment.
At the top of the scan let's clear D0, and then add a loop that increments D0 a thousand
times.
In the interrupt service routine or ISR, let's copy D0 into D1.
That will record where in the loop we were when the interrupt occurred.
Accept all of that.
Let's see – we haven't actually connected to the PLC yet, so I'll go ahead and take
care of that .. Make sure the PLC is not in run mode, and write it out to the PLC.
I'll reach over and flip the switch on the PLC to RUN and we see the PLC is running.
So, how long does it take the PLC to increment D0 a thousand times?
Well, click on INFO and we see on average it takes about 15 milliseconds to increment
D0 a thousand times.
Let's bring up a data view and monitor D0 and D1.
Remember that the data view updates at the end of each scan so all we see is D0 AFTER
it has been incremented a thousand times.
When I hit the pushbutton switch, that triggers the interrupt, D0 gets copied to D1, and we
can see where the loop counter was when the interrupt occurred.
. How fast does the interrupt respond?
The time it takes for the Do-more to react to an interrupt is what we call interrupt
latency.
And look at this - there is an ISR structure member that tells you what the latency is!
In this example it's taking the Do-more about 3 micro-seconds to react to the event.
How cool is that.
You can also see how long it takes for the ISR to run, whether it has been triggered
or not, if it is currently inhibited, how many times it has been run.
Everything you could want to know about an ISR right there.
Now remember – the ISR is literally stopping the regular scan, doing its thing then letting
the scan continue.
It's really important to keep an eye on that execution time and make sure it doesn't
take too much time away from your regular scan.
Looks like out ISR is taking this much time out of our 7.6ms loop.
That's has almost no impact on our scan time which is what we want.
Normally you just want to record something in the ISR- like we recorded the loop counter
in D1 – then do something with that in another task or program later as part of the regular
scan.
Don't let that interrupt service routine get too long.
A few other things to keep in mind about interrupts: An interrupt that triggers an event, can't
re-trigger the same event while its interrupt service routine is still running.
That event will be lost.
If an interrupt for a different event occurs while an ISR is running, then that event WILL
be processed after the current interrupt is done.
Another good reason to keep your ISR as short as possible.
Can you do anything you want in an ISR?
No.
You can't do looping, for example.
Why?
Because ISR's don't yield so the loop has to run to completion which takes a long
time so they simply aren't allowed in an ISR.
Asynchronous instructions aren't allowed in an SIR.
Why – because Asynchronous instructions require multiple scans to run and you never
know when or if an ISR is going to run.
So asynchronous instructions don't make any sense in an ISR.
You don't need to remember all of this.
Do-more designer will tell you if you try to use an instruction that doesn't work
in an ISR.
Well, that's enough for a quick intro to Interrupts in the Do-more BRX PLC.
In the remaining videos in this series will take a close look at exactly how to use the
OTHER kinds of interrupts and then cover loose ends like configuring interrupts while the
PLC is running.
And if you need any help with the BRX PLC, please contact AutomationDirect's free award
winning tech support during regular business hours.
The will be happy to help.
And don't forget the forums.
There are lots of experienced automation professionals there that love to share their years of experience.
Just don't post any questions directed at AutomationDirect's support team there, they
don't monitor the forums on a regular basis.
-------------------------------------------
BRX PLC Interrupts - Part 3: Register Matching - Duration: 5:28.
PART III Register Match Interrupts The Do-more BRX PLC has a register match option
for generating interrupts.
What does that mean?
Suppose you setup input X0 to be a high speed counter of some kind and you want to know
when the count reaches some specific number.
And you don't want to wait for the next scan to come around to find out about it when
all the regular inputs get updated because it might be too late.
Instead, you want to know about it right away so you can react accordingly.
Well, that smells like an interrupt thing – right?
And that's what this register matching interrupt option is.
You can trigger an interrupt on one of three dedicated counter/timer accumulators or one
of three output pulse counters.
Let's do a couple examples and see how this works..
Assume the counter has already been setup correctly – that's a subject for another
video.
And we want to react when that counter reaches 1234.
Create a new ISR and we want it to execute that ISR when High Speed counter timer 1 is
equal to 1234.
Hit ok and we see an equation that says, execute the ISR when this timer counter is equal to
this number.
Perfect.
In the ISR we'll set output Y3 with an immediate set command.
So we should see output Y3 turn on when the input accumulator equals 1234.
Let's do the exact same thing with function 2 but when the accumulator equals 1500 we'll
turn Y3 off.
So we're gonna need another ISR which we'll use to turn Y3 Off.
And when that same accumulator is equal to 1500 we want to execute that ISR routine.
And in that ISR we'll use an immediate Reset instruction to turn Y3 off so it will turn
off immediately and not wait for the bottom of the scan like all the other outputs.
Accept all of that.
Write it out.
And make sure the PLC is back in run mode.
I've connected one output from an encoder to input X3 on the PLC.
Here's a Dataview that shows the input counter's accumulator and its reset control.
The output we are controlling and the run counter for both ISRs so we can see how many
times they have been triggered.
I'll hit the reset to make sure the accumulator is cleared before we start.
If I rotate the encoder up to the 1234 we specified, sure enough output Y3 turns on
and we can see that the ISR ran one time.
If I keep rotating to 1500, Y3 turns off and it's ISR ran one time.
Perfect.
And again, Y3 turned on and off immediately when the input changed – it didn't wait
for bottom of scan.
Which means you now have an accurate way to react to high speed input counters and timers
without having to wait until the top of the scan.
This is really great for monitoring and reacting to high speed inputs.
You can do the same thing with high speed outputs.
Suppose you've setup a motion axis to control some piece of machinery and you want to know
exactly when that axis reaches a certain position.
Well, it's the exact same thing we just did, except you tell the interrupt service
routine to monitor the output register instead of the input accumulator.
A word of caution about this: If you think you need to react to a high speed output using
interrupts, hold that thought for a second and go take a look at the table driven output
commands.
They do the same thing BUT they run in the background in their own dedicated hardware
so they don't have any impact on the scan time and you can specify a whole sequence
or table of events to watch for and to react to.
This says when the output counter get to this value set the output and when it gets to this
value clear the output.
Etc.
You can even see a plot of the out here.
Very cool.
There are separate videos that show you how to do all of that.
The key thing to understand is the interrupt register matching method we did in this video
interrupts the scan which could affect your performance and it only responds to a single
event.
We had to create three different ISRs tjust to turn Y3 onand back off again, didn't
we?
The good news with the ISR is you can do whatever you want– set an internal bit, modify a
register, record the date, etc.
The Preset Table and Table Driven output instructions only set the one output – you can't do
things like record the date and time, manipulate other registers, and stuff like that.
So just know that you have a choice when you need to respond quickly to high speed outputs.
And when you DO need interrupts, as you can see, Do-more's interrupt system is extremely
capable and will usually be more than you could ever need.
One side note: It's tempting to use the immediate instructions everywhere – I mean,
why wait for bottom of scan for anything – right?
Well, you could do that, but it's really not a good idea.
PLCs are designed to read inputs at the start of scan, do the ladder logic, and then update
all the outputs at the end of scan.
Using immediate output instructions outside of an interrupt service routine is a good
way to get things confused and to make your code really hard to debug.
So avoid that temptation.
If you need any help with the Do-more PLC, please contact AutomationDirect's free award
winning support team during regular business hours.
They will be happy to help.
And don't forget the forums.
There are lots of automation professionals there that love to share their years of experience.
Just don't post any questions directed at automation directs support team there, they
don't monitor the forums on a regular basis.
Spend Less, Do More with AutomationDirect
-------------------------------------------
BRX PLC Interrupts - Part 2: Timer Generated - Duration: 5:20.
The Do-more BRX PLC has four built in timers you can use for interrupts.
Why is that important?
Well, Remember that a PLC reads the inputs at the top of the scan, executes its ladder
logic, then updates the outputs at the bottom of the scan.
If we toggle an output bit every scan it would look like this on most scans, but on some
scans it might take a little longer – it all depends on what the ladder logic is doing
during that particular scan.
And that's the key point – we never really know exactly when those outputs are going
to be updated.
So what if we wanted generate a regular periodic output that wasn't affected by the scan
timing?
Or what if we want to add a known delay to an output and not have it affected by the
scan time?
Well, that's where timer based interrupts and the immediate out instructions come in
handy.
Let's do an example to see how that works.
Let's setup a timed interrupt, make it recurring, with a duration of 250 microseconds, and create
a new ISR to handle that timer generated interrupt event and hit OK.
So now, every 250 microseconds – regardless of the scan time - this ISR will be executed.
In that ISR, let's toggle output Y0 so we can see it on a logic analyzer.
Notice that we're using an immediate instruction to toggle Y0.
That says set this output immediately – don't wait for the bottom of the scan when outputs
normally get updated.
Accept all of that.
Make sure the PLC is in terminal mode.
Write it to the PLC.
Switch it back to RUN mode.
If we look at Y0 on a logic analyzer we see our 250 microsecond pulses coming out.
And look how rock steady they are.
And remember – we don't have any ladder code in the main loop do we?
This runs completely independent of the normal scan.
In fact let's try that.
I've created a little ladder program that uses a timer to enable a task every millisecond
and also resets the timer's accumulator so it will start counting up again to 1 msec.
The task, just increments a register a thousand times to waste some scan time.
I'm also toggling Y1 each scan using this Scan Toggle bit which inverts every scan.
That will get updated at the bottom of each scan just like all the other normal outputs.
So we should see Y1 toggle at regular intervals, except on the scans where the task is enabled
which will make the scan take a lot longer.
Now if we look at those outputs on a logic analyzer, we can see Y1 toggles every scan
and some scans take a lot longer than others when that task gets enabled.
But Y0 – which is toggled by the interrupt timer event - toggles at regular intervals
completely independent of the scan time.
Again, exactly what we expect.
So now you have a way to generate super accurate outputs that are independent of the scan time.
How cool is that?
If you need to disable that timer interrupt, you can either use the ISR structure member
to inhibit that in code, or, just go back to the dashboard, click on interrupts and
uncheck the enable box.
That interrupt event is now disabled.
The immediate out instructions are really intended to be used in ISR's but you can
use them in your regular code if you want to.
For example, let's clear out the previous example and use the immediate instructions
in the main program to set and reset Y3.
What would happen if these were regular out instructions?
Well, since outputs don't get updated until the bottom of the scan, all we would ever
see would be the result of the reset instruction and Y3 would never change.
But in this demo we're using the immediate instructions.
Let's see what happens.
Accept all of that.
Switch to terminal mode, write the program – notice Do-more Designer is warning us
that we are using immediate instructions outside of an Interrupt Service Routine – we know
that so we hit ok.
Sure enough, we see Y3 toggle – it gets set and reset during each scan – it doesn't
wait for the bottom of the scan to get updated.
Cool.
Looks like it takes a couple microseconds to do that, but look at this - the scan takes
about 280 microseconds.
Why does the scan take so long if all we are doing is toggling a bit?
Because there's a bunch of stuff the PLC has to do at the top of a scan, including
reading all the inputs and a bunch of stuff it has to do at the bottom of the scan including
setting the outputs.
Regardless, half a millisecond for a scan?
That's pretty good.
So far we have been using the timer to generate periodic interrupt events independent of the
scan time.
Can you use the interrupt timer to generate just a single super accurate delay?
Maybe you want something to happen sometime after an event occurs and it needs to happen
right away, and not wait for the end of scan.
Easy, just use this one shot mode.
The interrupt event will trigger one at the delay time you specify.
Easy.
If you have any questions about the BRX PLC please contact AutomationDirect's free award
winning support team during regular business hours.
They'll be happy to help.
And don't forget the forums.
There are lots of folks there that love to share their years of experience.
Just don't post any questions directed at AutomationDirect's support team there – they
don't monitor the forums on a regular basis.
-------------------------------------------
Seis Patitos - Canciones Infantiles - 6 Patitos - Duration: 27:59.
For more infomation >> Seis Patitos - Canciones Infantiles - 6 Patitos - Duration: 27:59. -------------------------------------------
Sarah Long Bridge closer to completion - Duration: 1:55.
SPAN AND
TRAFFIC BY EARLY THIS FAL
850 DAYS DOWN, ABOUT 177 TO GO,
AND PROGRESS ON CONSTRUCTION OF
THE NEW CZAR ROW LON BRIDG.
AND TWO BEAMS THAT WILL MAKE UP
THE CENTER LIFT SPAN FLOATED IN
BY BARGE.
>> THEY WEIGH ABOUT
416,000 POUNDS A PIECE, AND THE
SIX PIECES TOGETHER WHEN FULLY
ASSEMBLED WITH ADDITIONAL
LIFTING BEAMS AND FASCIA BEAMS
WILL WEIGH AROUND
4 MILLION POUNDS.
REPORTER: THE NEW ACCESS ROAD IS
TAKING SHAPE ON THE PORTSMOUTH
SIDE.
>> THE FIRST TWO OF 15 SPANS
HAVE BEEN COMPLETED OVER MARKET
STREET IN NEW HAMPSHIRE.
REPORTER: WHAT MAKES THIS
PROJECT UNIQUE IS THAT IT A LIFT
TOWER THAT'S BUILT IN SEGMENTS,
LIKE A GIANT LEGO SET AND THAT
IT SERVES BOTH VEHICLES AND RAIL
TRAFFIC.
THE CENTER STAND WILL GO UP FOR
SHIPS AND LOWER TO CONNECT TRAIN
TRACKS BELOW.
>> I BELIEVE THAT'S THE ONLY ONE
IN NORTH AMERICA THAT OPERATES
IN A SIMILAR MANNER.
THERE IS A BRIDGE SIMILAR TO
THIS ONE IN BORDEAUX, FRANCE.
REPORTER: THE SARAH LONG WAS
MADE IN NEW HAMPSHIRE AND IS
CONSIDERED THE PRIMARY BACKUP TO
THE HIGH 95 BRIDGE.
>> THERE'S A LOT OF CHALLENGES,
IT'S A VERY COMPLICATED
STRUCTURE AND THEN WORKING IN
THIS MARINE ENVIRONMENT AND THE
WEATHER CONDITIONS, WORK, ON THE
-------------------------------------------
🎮 TO-FU Oh SUSHI - Games For Kids in English | Fun Baby Kids Games - Duration: 7:32.
TO-FU Oh SUSHI - Games For Kids in English | Fun Baby Kids Games.
-------------------------------------------
🎮 Healthy Eater Baby's Diet - Fun Games For Kids | Play Kids Games - Duration: 11:29.
Healthy Eater Baby's Diet - Fun Games For Kids | Play Kids Games.
-------------------------------------------
70 degrees Wednesday; snow possible this weekend? - Duration: 1:09.
SUNRISE IS AT 6:40.
SCATTERED CLOUDS THROUGH THE DAY
, YOU SAW THOSE FROM JOHNNY
ROWLANDS' SHOT FROM NEWSCHOPPER
9 AND THEY WILL BE HERE THIS
AFTERNOON BUT NOT ENOUGH TO KEEP
US COLD.
WE WILL SPEND MOST OF THE DAY IN
THE 60'S AND 70'S.
WITH A STRONG SOUTHWEST WIND, UP
TO 35 MILES PER HOUR.
THIS IS A GRAPHIC YOU WILL WANT
TO LOOK AT BECAUSE IT HAS SNOW
ON IT FOR SATURDAY.
THE CHANCE OF SNOW SATURDAY
MORNING AND AFTERNOON, RAIN TO
THE SOUTH, AND I THINK BECAUSE
TEMPERATURE PROFILE SUPPORTED
CHANCE OF SNOW, MAYBE EVEN
ACCUMULATING SNOW TO THE NORTH.
THAT WINTRY MIX WE ALWAYS TALK
ABOUT, THAT IS ON THE WAY FOR
SATURDAY.
STILL TOO EARLY TO TALK ABOUT
ACCUMULATION.
I JUST WANT YOU TO PREPARE FOR
THE COLD.
-------------------------------------------
Cardiff University: Accessible 3D printed microfluidic devices - Ultimaker: 3D Printing Story - Duration: 4:23.
Fluids behave quite differently at the microscale
and this enables us to do experiments that we would otherwise not be able to do
In the laboratory, at the moment we have 3 focus areas of research
which all have a common requirement for producing spherical capsules
The first is in nuclear fusion energy production
where we need small capsules for putting the nuclear fuel in
The second is where we're making protocells, or artificial cells, for studying membrane-protein interactions
and the third is where we're studying encapsulation of the stem cells to go in the spinal cord
to repair your damaged spinal cord if you've been in a car crash
A microfluidic system can be compared to a large-scale plumbing system, say in this building
but reduced in size, onto a chip
Very small tubes delivering fluids to different types of sensors and other actuators in the system
So we can design small circuits to move around small volumes of fluid
generally using techniques borrowed from the microelectronics industry
Recently, we started using 3D printing to make these microfluidic devices
and that has many benefits because it enables us to make microfluidic devices very rapidly
so we can iterate and make new designs and improve upon those designs very rapidly
It also enables us to make things cheaply
Because these printers are cheap and affordable, it's a technology that we can share with our collaborators
and bring microfluidic technology to other people and other researchers who wouldn't otherwise be using it
Traditional microfluidic techniques require very expensive equipment
and also a great deal of knowledge of how to use that equipment
So that puts a lot of people off
whereas with 3D printing, you just need to be able design it on a computer
which is fairly simple to learn
and then press a button and walk away, and then you come back and your device is ready to use
It's also beneficial that you can incorporate it with more traditional techniques quite easily
you can plug it into existing fittings that are readily available
We begin with the very simple modular building blocks; just tubings and junctions
From there, we expanded that to a wider range of different types of microfluidics
We used those different design systems to make a modular system that's based on Lego
that anyone can print out and click them together and make their own microfluidic systems
Previous researchers have discounted this type of printing because they found that it leaked
and they couldn't see through it
But by refining the print characteristics I found that if you avoid under extrusion
you can make the devices both transparent and water-tight
To avoid under extrusion, you have to print quite thin layers and you have to print quite slowly
So 50-micron layers at speeds of 30 millimeters a minute or less
The same techniques that make them water-tight also beneficially make them transparent
because the gaps in between the device are what cause you to lose transparency
We're pleased with what we've been able to achieve with 3D printing for microfluidics so far
but what we're really looking forward to is
as the diversity of the materials with which you can print expands
and the resolution of the printers improves
being able to make not just fluidic circuits, but integrate optical and electronic components also
This will enable us to print multifunctional devices from multiple materials in one single device
We're working with researchers from a range of fields around the world
and 3D printing really allows us to be able to send the design to another laboratory
We're working with people in Italy, for example
and we're able to send them designs that they can print out in their labs
conduct experiments and report back the results the very same day
It really makes the process much simpler so that everyone can access the benefits of microfluidics
The beautiful thing about 3D printing is that potentially everybody can have them
Any other walk of life, a hospital, a biological laboratory, anywhere really - everybody can use them
It democratizes the technology of making things
-------------------------------------------
Crochet earrings with flying effect - Duration: 11:04.
Crochet friend, very welcome Handworkdiy
I want to show that today we will work
crochet earrings, as nice as these
and they are very easy to make
we will apply the technique which we saw
in another tutorial
how to crochet frilly
so we can go to apply everything
we learn in our crochet projects
It is a very pretty flower
they will be able to use anytime
we will work with threads
cotton is super thin
they can apply in the homes of wool
that can be used with crochet hook No. 3 or 1.75mm
and the same thread
we will work on both tones
in brown and green
as you are seeing here
also they need a metal ring, clip element like this
which is pressed with a clamp
Finely tip
a hook for earrings
and the second option is:
if they do not get these hooks pressure
They are sold in stores bijouterie
If they fail, they can use
2 small rings like these
the same color as the hook for earrings
I'm going to work with this applet
but I'll also explain how to work
with these metal rings
the first thing to do is cover the hoop with 1 lap Midpoint
this technique and saw another tutorial
bring the thread forward
I take the two strands
and I work the first chain
the first chain could leave and
leave the shorter strand, then we
to keep inside job
and to cover this ring, I need to knit 30 sc
but if you have a larger ring
They will weave the necessary amount of midpoints
to cover the entire metal
if it is smaller, so it does
the amount they need work
I knitted 30 sc, I was keeping the thread
inside job
we can cut if they want
I'll close on that first single crochet working at first
and I close with a slip stitch
cut green thread, because we are not going to use
first we close here
I return to work 1 air chain
and I withdraw the strand
then I'll save in the next round as I did with the other
this is already safe and well stored inside the metal ring
Now we will work with brown thread
And we work the technique of the crochet wheels
And we work the technique of the crochet wheels
I'm going to put on that last stitch that I worked
bring the strand
with 2 strands work together on January 1 chain
then let that short strand
so because we in keeping
We take them well, because we will be keeping in the work
and work 2 more in total is 3 chains chains and represent a double crochet
I'm going to put into this same
point to work 2 dc mores
And I'm working 3 dc on the same basic stitch
3 dc
I go to the next point
and 3 dc work together
in one base stitch
as they kept the strands more
short as seen here, I will continue well
to complete the entire circumference of this ring
working 3 dc in each base point
We completed all return and we will close in the first
chain to give up work
closed with a slip stitch
we weave a chain air
and I recall the thread I precut
that would be the end
here I'm going to put this element
but first I want to show
how to work these two rings
of metal, if they fail these clamp members
Finally we keep this thread
we turn work
I stand anywhere and bring the strand backwards
I repeat until firm
I stand and I bring now making a
small knot
we cut
Hence this accessory is placed and press it down with a clamp
I want to show that I took good way down, so this curve effect is achieved
I want to show how to place metal rings
we do so, we open it with the clamp
and place as follows
well, trying to reach
until the strand green
once you put on the strand green
then we place the metal ring oto
within the first ring
only then
We closed in this way, with the clamp
the metal ring
so we achieve the same effect as if we put other accessory
the hoop holds me from the green part
As in the other earring
why two rings of metal?
because the hook for the slope should be positioned me
in this way
Looking back
if I put one, the hook in this way and will not be well
so I put two rings of metal
I will now remove the metal rings
and I will show how to attach the accessory that makes pressure
We open it and remove
place the other accessory
pushing down
to green
we press
and ended with the clamp adjusting
now then we put
pendant for earrings
We opened with the clamp
Note that always, is positioned on the right side
then with the same clip, we close the hook
to ensure
we have a pair of earrings super nice and very creative
so they can enjoy
the tutorial here today, thanks as always for joining
we very soon, with many more ideas
crochet
-------------------------------------------
Video: Legislators hear slew of bills on opioid misuse - Duration: 1:48.
LAST
CRITICS CONTEND PAIN MEDICINE IS
BEING HANDED OUT LIKE CANDY
EMERGENCY LEGISLATION SOUGHT BY
THE STATE HEALTH DEPARTMENT WILL
PROHIBIT DOCTORS AND OTHER
PRACTIONERS FROM PRESCRIBING
PATIENT MORE THAN A SEVEN DAY
SUPPLY OF OPIOIDS.
>> I WOULD THINK THAT THE
PRESCRIBERS MAY HAVE STRONG
OPINIONS ON IT.
>> SOME OF THEM MAY AGREE SOME
OF THEM MAY THINK THEY KNOW
WHAT'S BEST FOR THEIR PATIENTS.
REPORTER: SEVEN STATES PLAC
DURATION OR QUANTITY LIMITS ON
OPIOID PRESCRIPTIONS.
ARIZONA, CONNECTICUT, MAINE,
MASSACHUSETTS, NEW YORK, RHODE
ISLAND AND VERMONT.
JUST LAST WEEK GOV HOG
-- GOVERNOR HOGAN DECLARED A
STATE OF EMERGENCY FOR OPIOID
AND HEROIN MISUSE COMMITTING AN
ADDITIONAL $50 MILLION OVER THE
NEXT 5 YEARS TO BEEF UP
EVERYTHING FROM LAW ENFORCEMENT
TO TREATMENT CENTERS
BUT THE CHAIR OF THE HOU
HEALTH AND GOVERNMENT OPERATIONS
COMMITTEE BELIEVES THAT HEALTH
DEPARTMENTS REQUESTED
DESCRIPTION LIMIT BILL WOULD
CARRY MORE WEIGHT IF SOME ONE
FROM THE ADMINISTRATION
TESTIFIED IN SUPPORT.
>> THIS ADMINISTRATION HAS
CHOSEN NOT TO TAKE POSITIONS A
NOT GIVE US THEIR OPINION.
THEY GIVE US LETTERS OF
INFORMATION.
SO IT'S SOMETIMES HARD TO KNOW
WHAT'S ON THEIR MINDS.
REPORTER: THE HOUSE COMMITTEE
HEARD A HALF DOZEN OPIOID
RELATED BILLS.
ANOTHER THAT IS ALSO GETTING
LOT OF ATTENTION ESTABLISHES 10
CRISIS TREATMENT CENTERS A
TOLL-FREE HEALTH CRISIS
HOTLINE AND REQUIRES COLLEGES
AND UNIVERSITIES TO OFFER
CREDITS RELATED TO SUBSTANCE USE
DISORDER AND PAIN MANAGEMENT.
>> THERE'S A GREATER NEED TO
PROVIDE FOR PROFESSIONAL STAFF
TO WORK IN SOME OF OUR SERVICES
IN COMMUNITY BASED PROVIDERS
REPORTER: BILL SUPPORTERS
CONCEDE THERE IS NO FUNDING
SOURCE.
THEY ARE COUNTING ON MATCHING
FEDERAL MONEY TO PAY FOR IT.
-------------------------------------------
How to draw a cartoon FLY - Duration: 3:21.
How to draw a cartoon FLY
-------------------------------------------
EMINEM расширил лейбл; FUTURE; Кто наживается на вещах покойных рэперов #RapNews USA 33 - Duration: 9:38.
For more infomation >> EMINEM расширил лейбл; FUTURE; Кто наживается на вещах покойных рэперов #RapNews USA 33 - Duration: 9:38. -------------------------------------------
Video: Maryland prepares for 'A Day without a Woman' - Duration: 1:45.
T WORK.
>> WE CAN PROBABLY HANG SOME
STREAMERS THERE TOO.
REPORTER: TERRIE FLECKENSTEIN IS
PREPPING FOR HER CONTRIBUTION TO
A DAY WITHOUT A WOMAN.
AT HER BUSINESS IN HAMPDEN,
SHE'LL DECORATE THE FLECKENSTEIN
GALLERY IN RED STREAMERS, AND
BALLOONS, IN A SHOW OF
SOLIDARITY.
>> BRING ATTENTION TO THE FACT
THAT HEY, THERE IS 50% OF THE
POPULATION HERE, WE HAVE TO HAVE
OUR VOICES HEARD.
REPORTER: TERRI AND HER FEMALE
EMPLOYEES WILL BE AT WORK ON
WEDNESDAY AS USUAL, BUT SOME
WOMEN ARE PLANNING TO STRIKE,
WEAR RED, AND TAKE PART IN
MARCHES IN BALTIMORE, D.C., AND
THROUGHOUT THE COUNTRY.
>> IT'S BEEN INCREDIBLE.
REPORTER: IT'S AN EFFORT, THAT
JOANNA DIAMOND FROM PLANNED
PARENTHOOD OF MARYLAND SAYS GREW
OUT OF THE HISTORIC WOMEN'S
MARCHES IN JANUARY.
>> JUST REALLY SNOWBALLED INTO A
GRASSROOTS ORGANIC EFFORT.
ACTIVATE, PEOPLE GET THEM
ENGAGED IN THE POLITICAL SYSTEM
AND MAKE SURE THAT THEY HAVE A
VOICE HEARD.
REPORTER: AS PART OF THAT
SUPPORTERS OF A DAY WITHOUT A
WOMAN ARE PLANNING TO AVOID
SPENDING MONEY EXCEPT FOR AT
BUSINESSES LIKE TERRI'S THAT ARE
OWNED BY WOMEN AND MINORITIES.
THE IDEA IS FOR WOMEN TO SHOW
THEIR ECONOMIC POWER.
MUCH LIKE A DAY WITHOUT
IMMIGRANTS LAST MONTH, A
MOVEMENT THAT BALTIMORE
ECONOMIST ANIRBAN BASU SAYS
DIDN'T HAVE THE ECONOMIC IMPACT
AS SOME MIGHT HAVE HOPED.
>> I DON'T THINK THE ECONOMIC
IMPACT WAS GREAT, I HAVEN'T SEEN
ONE ECONOMIST ALTER THEIR
FORECAST FOR U.S. PERFORMANCE
DURING THE FIRST QUARTER, OR
ALTER THEIR PERCEPTION OF WHAT
THE FEBRUARY JOB NUMBERS ARE
GOING TO LOOK LIKE.
MANY IMMIGRANTS FELT THE NEED TO
SHOW UP FOR WORK THAT DAY.
REPORTER: PRINCE GEORGE'S COUNTY
SCHOOL OFFICIALS SAY THAT 1700
TEACHERS AND 30% OF THE
TRANSPORTATION STAFF REQUESTED
LEAVE LEADING TO THAT SHUT DOWN.
-------------------------------------------
LEARN COLORS WITH PLAY DOH How To Make Rainbow Swirl Lollipops with Play Doh DIY Play Doh Discovery - Duration: 4:51.
LEARN COLORS WITH PLAY DOH How To Make Rainbow Swirl Lollipops with Play Doh DIY Play Doh Discovery
-------------------------------------------
Suspect in court after shooting and chase - Duration: 0:49.
BETHANY: IT TOOK QUITE A BIT OF
EFFORT TO ARREST THIS SUSPECT.
POLICE HAD TO CHASE HIM WHILE HE
WAS NAKED AND RUNNING FROM THE
RED ROOF INN.
HE IS CHARGED WITH ASSAULT WITH
A DEADLY WEAPON WITH INTENT TO
KILL.
THE INVESTIGATION BEGAN WHEN TWO
GUNSHOT VICTIMS CHECKED IN AT
THE MOSES CONE HOSPITAL.
ONE PERSON WAS TREATED AND
RELEASED ON THE OTHER VICTIM IS
STILL IN THE HOSPITAL IN STABLE
BUT SERIOUS CONDITION.
POLICE SAY THE SHOOTING HAPPENED
AFTER A FIG BETWEEN THE
SUSPECT AND HIS GIRLFRIEND ON
MARCH 1.
HE WAS ARRESTED YESTERDAY SO
THIS WOULD BE HIS FIRST COURT
APPEARANCE THIS MORNING.
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