Hi. Welcome to the last module in domain five. Domain five is basic IittIe literacy
This particular module 5.5
is looking at the importance and impact of various environmental and safety concepts when working with I t equipment.
So we're gonna look at the following proper disposal methods. When you want to dispose off hardware or consumables like toner and ink,
we're gonna look at power options
available for computers. Such a surge protection
on uninterruptible power supplies.
We're going to look at the importance off device placement,
not placing your computing devices in
locations and environments, which could be damaging to them.
One type of damage that
computing components can suffer from is electrostatic discharge. So we'll have a look at that.
And finally we're gonna have a look. Att Ergonomics The science off
interaction between humans and machines.
So first just looking at hazardous waste disposal.
standard roo hs, and this is the restriction of hazardous substance. Sees directive.
This was adopted by the European Union many years ago,
and what is designed to do and it's primarily aimed at manufacturers, is to restrict the use of certain hazardous materials within the manufacturer of electronic equipment.
It does not eliminate all hazardous materials. They just tries to restrict the amount that it's used.
This has not been adopted at the national level in the U. S. But states like California have adopted variations of it,
so that said, this is largely aimed at manufacturers. But
consumers should be aware that any items that are labeled with roo hs do contain hazardous material and should be taken to a municipal recycling facility for proper disposal.
They should not just be dumped in the trash
cathode ray tube monitors
on dhe TVs. So these were the old big box style TVs before we had LCD flat panel displays.
So these types of monitors, apart from being large and bulky,
they contain lead and phosphorus.
So you have to be careful about how you dispose of them.
They should be disposed off in designated recycling centers again, not dumped in the trash.
In some jurisdictions, it is actually illegal for you to dump these in the trash.
The other thing to watch out for is CR TSR. Vacuum sealed and they can implode. If the screen is head,
that's it, least something we don't have to worry about with LCD displays, however, LCD displays and scanners do contain glass on various electronics.
The electronics probably includes hazardous material.
Therefore, as with C. R T s, this should be disposed off only in designated recycling centers,
and you may want to check with your local, state, county or city government.
This is fairly easy to do these days. You can simply go search for it on the Internet.
Electron ICS recycling in the jurisdiction in which you're in
batteries, too, are subject to various restrictions and laws. So certain types of batteries should not be disposed off in the trash because they can make contain hazardous materials
disposal requirements very by jurisdiction. So once again,
you need to check with your local city, state or county government.
In this case, what you're seeing is the list stop. Batteries that cannot be thrown into the trash in the state of Maryland
on a simple search on the Internet produce that result.
Ink and toner cartridges.
The chemicals that are used in Nick's may be hazardous.
I told her that is used in laser printers is carcinogenic,
but remember that most likely by the time you throw a cartridge away or thinking of throwing it away. It is probably empty of toner, but there is start still some residual toner within the cartridge,
and therefore you should think about recycling both ink and toner cartridges.
So many electronic stores and office supply stores and
home supply stores like Home Depot will often have drop off boxes where you can
leave your empty in Cantona cartridges to be recycled.
Many laser cartridge manufacturers have recycling schemes in place, and they will actually give you a discount on a new cartridge if you recycle your old cartridge,
disposing off hard disks.
If the dead dr is defective
and needs to be trashed,
the same rules apply as for any other electronic equipment.
Ideally, you should e cycle it at a recycling center once again,
go on the Internet and check for your jurisdiction to see what recycling facilities exist for electronics,
possibly a bigger issue with heart, Desk says. If it still works,
and if it still works, and if you want to either
get rid of it, throw it away, sell it, give it away or whatever
the problem is. What about the data that resides of that hard disk. If it still works and you give it away to someone,
they could potentially access its contents.
This is true, even if you have deleted your files.
What happens when you actually go to delete a file is not that it's actually removed from the hard disk.
What happens is the file system is updated to indicate that this vial is now marked as deleted,
but the file itself still sitting there on the hard disk now. Eventually,
if you use the hard disk for long enough,
that space will get overwritten because it's being marked as available space now.
But if I just delete how load of files and then give the disc to someone else,
there are utilities you can get that will scan the disk and recover all those so called deleted files.
So as a result, you may want to take some extra precautions.
For example, you could encrypt the entire disc before getting rid of it.
So and that can be done, for example, in Windows with the built in feature in Enterprise edition of Windows called Bit Locker. Alternatively, you can actually wipe the data so that those areas of the disk that contains so called deleted files
actually get overwritten multiple times so people cannot access it
in Windows. There's the command line to call cipher Don t x C. That could be used to do that,
you know, effects. There is a utility called the Disk Utility that would do the same job
as faras. Corporations and enterprises are concerned. They're often very paranoid about having the hard disk fall into hands off people.
So rather than sell it or give it away, that may physically destroy the disk. And you can do this with just a drill. We can drill holes through it. You could try smashing it to bits with a hammer.
You can get dedicated devices that will shred a physical disc.
Or you could use these very powerful magnetic, he goes. Is they fire very powerful magnetic bills at the hard disk, and what that does is wipes out everything on the disk so it's unreadable,
moving onto power conservation.
So you may have seen this energy star logo on many devices that you purchase
any hardware with the Energy star logo has to comply with certain energy saving features. Now, these very depending on the type of device. For example, if it has a screen,
then it should be capable of dimming or going off when it's unused for a certain amount of time.
Um, your device may be capable of going to sleep when unused. When it goes to sleep. It's still running, but it's gone into a low power state.
Um, the display is turned off, and if it's, for example, a laptop or a desktop with a hard drive, it may suspend the drive that it spin it down.
The device may also be capable of shutting down after a certain period of non use,
and this is a feature called hibernation that is often available with laptops and desktop computers.
Other ways of saving
power is toe slow down the CPU.
So when the CPU is not very busy, we can slow down the frequency at which the CPU runs
and other devices like wireless adapters, could go into low power states again to conserve power.
As an example, if you have an energy star compliant display,
what is being indicated is this. If it sees no signal for a fixed amount of time,
then it turns off the display.
So, for example, if you leave your PC running and walk away,
the PC itself goes to sleep. And when the display doesn't see any more signals coming from the PC, it also turns itself off.
Many of these options can be controlled in Windows in Control Panel through add a plate called power options.
For all these features to be available, your computer should be a C P. I compliant
a. C P. I stands for advanced configuration and power into face.
And if it is compliant with that, here's some of the things you can do
in the power options. You can configure
that if your PC is unused for a certain amount of time, say, 15 minutes, the hard disk spins down
and you could say after 10 minutes, display turns off
on Dhe. When the system's not busy, the process of slows down and so on.
In order for this to be available, a C p. I must be supported both by the hardware that is the PC, and it's bios and supported by the operating system that you have installed on it