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How A CPU (Central Processing Unit) Works !

Hi, we'll be discussing classical computing, more specifically - how the CPU operates and CPU parallelism. [Music] In the previous video in this series we discussed the shrinking of the transistor, allowing for more powerful and efficient computers, as well as the end of Moore's Law based on the miniaturization of the transistor within the next seven to ten years. Be sure to check it out for some background context for this video. Now in that video when referring to computing performance, we were focused on classical computing based on the CPU.

Classical computing, is essentially the digital computer, almost every computing device on the market today is a classical computer. Classical computers operate in serial, in other words, as mentioned in the first video in the series, Computing Origins, executing various instructions extremely fast in 'order', but to the average user it appears to be running them in parallel, meaning multiple instructions at a time. This is du…

10 Coolest Android App You Must Have

Alright, I know that most of you who watch my videos use Android, so we're gonna do another video just for you, about 10 more cool Android apps to check out. Some of these might also be available on iOS, but not all of them. And many of these aren't even that well known, so hopefully you'll all find something new. So without further ado, let's begin.

App No.  1


Starting off, we have a quite useful app, "Adobe Scan". I've mentioned other scanning apps in the past, but this one is a bit different, and potentially much easier to use than all the others. Because with this how it works, is you hover the camera over what you want to scan, and it will automatically detect the document, scan it, crop it, and adjust the perspective. So you don't have to even press the shutter button, it does everything automatically. And if you have multiple pages, you just hold the camera up to each page as it snaps the photos to scan them. I've found it to be a lot faster and easier than other scanning apps. Now the one thing I will say is while it faster, I think this is best suited for documents where scan quality is not a top priority. Because you can't choose when it will take the photo, it might snap the picture at a weird angle, or when you're moving the phone bit, so it won't look as good as if you were to perfectly center the phone above the document, holding the phone as steady as possible. But at least this way you have something you can use if you're in a hurry.

App No. 2


Next up, number 2, is a cool photo editing app that actually is pretty popular called Prisma. The idea is kind of similar to Instagram, in that it applies filters to photos you have or take. But these filters are a lot more sophisticated than just adjusting the colors. The idea is you take a regular photo and turn it into a kind of "art". And these filters are all actually pretty sweet. Plus, you don't have to use the full strength of the filter. So maybe if you want to give your Instagram photos a little extra flair, this is a great way to do it. All these filters look really cool and there is a ton of them.

App No. 3


Alright, number 3 is an app that was created by Microsoft, ironically. It's the "Next Lock Screen", and as the name suggests, it's a lock screen replacement for Android. I don't necessarily have a problem with the default lock screen, but this one actually looks nice and has a lot of customization options you normally wouldn't get. For example, you can have the photo background be the Bing photo of the day, which is usually pretty good. You can also choose to have quick launch shortcuts of your favorite apps at the bottom, or swipe up to see them. And of course when you do that you'll also see shortcuts like a flashlight, wifi toggle, and battery saver mode. The only downside is it can add a bit of delay when unlocking the phone. Because it sort of runs "on top" of the default lock screen. You can disable this, but I wouldn't because then you'd lose some security from disabling the system fingerprint lock or whatever. Still worth checking out if you want something that looks a little bit nicer.

App No. 4


Moving on, we have an app for those of you who roam a lot, called WiFi Mapper. The idea is simple, you open the app, and it shows your location and any open WiFi hotspots that are close by even if they're not in range. This way if you need WiFi, you can just walk to the closest one. But as I've said before, open WiFi hotspots are usually, so you should always use a VPN if you connect to one. The way it maps the hotspots is it just uses the data from all the other people who use the app. When you open the app, it notes all the hotspots around you and puts them on the map for anyone else nearby in the future.

App No. 5


Next number 5, is another one probably a lot have heard of, DuoLingo. The point of this one is to teach you a new language in your free time. They have a ton of languages to choose from, and it uses a bunch of different activities to teach you words in the new language. One example might be matching up the word with an image, or matching up the equivalent word in your language. You aren't supposed to know all of them at first obviously, so it's fine if you get some wrong. The point is it's not just going to have you memorize vocabulary terms, but rather give some context to the words you're learning so you can remember them better. Pretty cool idea and a lot of people seem to like it, so it's worth checking out.

App No. 6


Now onto number 6, this one is really interesting and clever. It's called "Manything", and the idea is that it can turn your old android phones into security cameras for your home. I'm sure many of us have old phones lying around that still work, but you just don't have a use for them anymore. Until now! This is especially great for people who have been thinking about getting a camera like Nest or something but don't want to spend the money on it. This obviously isn't as ideal as a dedicated camera, but it's better than nothing. You just open up the app, set the phone as a camera, and then view it. There are settings for resolution, motion detection, alerts, and a bunch of other stuff. If it detects movement, it can upload the video to the cloud to watch later. This one has both free and paid plans, depending on whether you want cloud storage for the videos, but otherwise, it's free to use. And assuming the phone would be connected to your WiFi, it's not like this would use up any cell bandwidth either. If you don't have a security camera already, I'd check this out.

App No. 7


Number 7, "Twilight". This is one I think really everyone should have. What it does is changes the screen color and brightness at night automatically so it's a lot less harsh on the eyes. I've talked about this kind of stuff many times before, like Flux, Night Shift on iOS, and others. When you reduce the blue light produced by screens, the less it will disrupt your sleep schedule, which is a big problem these days. And while Android N does have a similar feature built-in, the effect is not nearly as strong as I think it should be. Twilight allows you to choose how strong you want the effect, so it makes the screen look almost completely red, or maybe not changed much at all depending on what you want. And you can have it set to go from specific times or change automatically at sunrise and sunset. The only downside is the way these app works isn't the best method for reducing blue light, but because the way Android works, it's all you can do without rooting your phone. Instead of adjusting the color profile directly as you would with flux on your computer, this just kind of overlays a red filter over the screen. So it works but makes everything look redder, instead of just removing the blue light. Not ideal, but it's all we have to work with unless Google allows better functionality in the future.

App No. 8


Onto Number 8, we have "Volume Notification". This is probably one of those apps you didn't realize you needed until you see it. What it does is adds a little menu bar when you swipe down for notifications, which lets you directly adjust the different volumes for music, the ringer, alarms, and others. As you might know, normally if you want toad just media volume, you have to press one of the volume keys and hope it adjusts the media volume instead of the ringer. If it doesn't, you have to go click the dropdown, and then change it. Really a pain. With this, you just swipe down, click on what you want to change, and it brings up the volume bar for it right there. And there is another app I'll quickly mention that goes along with this called "Rocker Locker". I've talked about it before but what that one does is lets you change the default sound setting the volume buttons control. So if you want the volume buttons to instead control the media volume by default, not the ring volume, you can do that. So these two I think I'll group together.

App No. 9


number 9, this one is actually really awesome. It's called "Photo Math", and it lets you solve math problems just by pointing your camera at it. Anything from complex calculus to basic arithmetic, you just line it up with the box, and it instantly solves basically anything you throw at it. And not only that, it will even show you the steps you would need to take to solve the problem yourself. So I think this would obviously be pretty useful for anyone taking a math class, and maybe there's a weird homework problem, just let your phone does it. Or if your handwriting is so bad it can't figure out what you wrote, you can also just type in the problem manually. So much for all those teachers that used to say, "you have to learn all this because you won't always have a calculator with you!".

App No. 10


Ok, finally we have number 10, an app called"Navbar Apps". This one allows you to customize the way your navigation bar at the bottom of your screen looks. Usually, your phone might have a couple of settings to choose between white, black, or clear. But with this, the sky's the limit. You can choose from a bunch of different images, or add your own, or just use a solid color. It even lets you add emojis for some reason. But one really cool one is you can have the navigation bar act as a battery meter. So the more battery you have left, the more it's filled up with one color and gets smaller as the battery drains. These customizations don't seem to work app, and for some reason, it seems to disappear when I'm at the home screen, but it does show up in most of the apps I use. So this is a pretty fun one I think. So, that's it, hopefully, out of those 10, you guys found at least a couple you didn't know about before. And be sure to check the comments below incase other people know about some cool apps I didn't mention.

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