This is the third annual CS 50 fair at Yale University.

I'm here with my colleague and college friend Benedict.

Hi there.

So welcome again to the third.

Ah, CS 50 fair at Yale.

And we are at the Peabody Museum of Natural History here at Yale because we actually in CS 50 have a long and storied history.

And as you'll see from some of the exhibits in the museum, it in fact, goes all the way back to the time of the dinosaurs.

And we've brought it forward over many years so successfully that now we're up to the present day with some awesome projects from our students.

We have about 100 20 presenting, and so we're really excited to have you all here and come see what they've produced.

Hey, guys, this is CS.

I'm Idris, and welcome to the Seas with a fair at Yale.

I am glad to introduce Joe and Max.

They're kind of those shows are their project today.

So, guys, could you guys just walking through your project?

So I'll need you guys threw a little demo here.

So, uh, here you can see the corn axes.

So what we did a 300 rapper, and here you can enter in function of X and y.

So, for example, there's a plane and we'll just go ahead and grab that and wall renders.

You can choose X and Y ranges as well as a number of divisions.

So way chose a relatively small amount of divisions here.

So the graphics, little greenie and basically a small amount of divisions waste a lot of points basically.

So basically, it just drops this amount of points here on drug around on the screen.

Change in perspective Way did this in a library called through jazz.

We used mainly Java script way.

Also used a little bit of python to get a flask out running.

Um, but it was mainly Java script way also implemented the Math Jazz Library in order to parse the X and Y functions so that our graphic could have some utility for math functionality.

Okay, what do you think we're the biggest challenges?

Um, I think getting the grafts to render in a way that made them look like smooth surfaces was really hard challenge.

We initially wanted to make the grafts sort of tiles between points with that proved too challenging and too long took too long to render.

So we just tried to simplify it by utilizing the point cloud feature and three Js and it worked out really well.

Okay, Okay, sure.

I think we have preset.

We have a cone and 1/2 sphere on.

Then you can use the camera functions Thio.

And we really envisioned this project toe have some meaning, especially for, like, math 1 20 students, which we're currently in because there isn't really that reliable software out there to graft function.

So that was the rationale for our project.

Yeah, I have an idea.

Uh, you know, something you learned in this project wasn't covered in the main course is something that you built upon.

I do so like something that wasn't like wasn't covered.

Yeah, I think the sheer amount of helper libraries when you didn't join Creed, I think we didn't realize how much we were helped along by the source code that we were given the piece.

That's so we felt like we kind of do how to do everything on our own against its life.

So I guess proud way We're really happy with it.

That's great.

Could I could I put in the function of something to test it out?

So, for example, put in like, uh, ex.

Um so these are like the bass.

Oh, God.

Oh, God.

Functionality of that is, once you grab a function, it appears on the left function menu and you can click on click to have it appear again.

Okay, On the ground That way.

Way, way.

Oh, that's oh, man.

And then I could just Oh, wow.

World is American to finger 00 that's just visually so cool.

Oh, wow.

Okay.

So any any final takeaways from this project?

We were talking to some people earlier, and they were saying, like how this could have some sort of statistical functionality, so maybe we could extend out in the future way really proud.

Very good.

Okay, so this will see a city.

Let's check out some more projects.

Hi there.

My name is Xu 10.

And I'm Assault Warren Pierce in college, and I'm a course assistant for CSF.

The actual text yesterday last year.

So this was such an amazing opportunity.

I'm here with three awesome girls and they made an amazing project.

So if you want to go ahead and introduce yourselves.

Sure.

I'm Greta.

I'm Emily.

And I'm also first year in styles.

And I'm Catherine, and I'm also first year instalments.

Tell us more about your project and they give us a devil.

Yeah.

So basically, we made a Yale themed emoji.

I'm message extension, and we use this way called this in Swift if we have to learn from scratch by, like, washing tutorials online, and we use X code as our i d.

So I'm gonna give you a short demo of it.

So this is the app itself that you would like download from the app store, which has a text field in it but doesn't really contain the meat of the abs functionality.

For that, we go to messenger.

Let's say you want to text Save J.

Malin.

Um, you didn't pull up the keyboard and then use the globe icon to Taco.

And here we are at our keeper that we designed.

So you want to say David J.

Male and I don't know what you want something, Peter Salvador the mustache way.

Get a nice little message saying emotions being copied.

And now we can paste it into the text field and send it.

Yeah, and to use this app to receive the messages you don't have to have downloaded like sending anyone you want.

And basically, we use like a copy and paste functionality just like moving Awesome.

What were some challenges that you encounter when you were making your It was kind of difficult because none of us had experience with Swift before and we went over like, sea and job.

But after watching tutorials, it was much easier.

And how did you decide on Swift versus an android app which uses java?

All of us have products like I think you probably don't know.

I'm just drawing thio.

How did you make the artwork?

It looks really nice way just made them in Photoshopped pictures that way.

Another question I had was how is how did learning the things and yes, if you help you with getting used to a new language and working with a lot of it was really nice and seems to me that we like every week we kind of like a new language that was, like, really easy, like adopting new languages like we learned the syntax So just watching some tutorials we were able to, like, learn the new works.

And that's the final take away.

What was the most enjoyable part of your experience with CS in the final project?

Oh, way made, like a lot of progress on our project of the C 50 hacker on.

That was really fun.

I thought it was just, like, great till I'd be in the community with all the hiring, the coders working.

Also, there were lots of tea.

Is there are people who are mentoring.

You're like New Swift.

I'm really hopeful.

Yeah, because we were kind of, like branching off into uncharted territory for That's amazing.

Yeah.

So it was fine.

Yeah, Well, thank you so much for showing us a demo.

Let's check out the other projects downstairs.

Hi, this is Marcia from CS etc.

And I'm here with Eric Student.

So, Eric, do you want to walk us through your project?

I decided to do machine learning for my project.

Um, I want to be very ambitious efforts and make something that can recognize council images.

But that proved to be very difficult because cancer images are in and three D images and So is a little hard to teach my machine do that as a beginner especially.

And so I wanted to move to something simpler and have it recognized Time writing.

Specifically, I trained it to recognize the ammonites.

D database wishes a database of hand written images.

Here is some examples, like like this.

Um And so basically, when my machine can do now is if I input any sample images, that is handwriting.

For example, this one's a five.

You can put something like this, And just to show you how it works, I have to run.

Python addicts sample.

What number would you like to see?

Um, Thanks.

Six.

Ok, so, six, this is damage for six.

And then I talked to run sample six PNG, and it should win 97% accuracy.

Tell me that my number is six.

Oh.

So how long did this project take?

You said machine learning.

Yeah, So I was very intimidated by machine learning.

I spent the entire Thanksgiving break taking online courses on course era.

Andi just going on.

You two been watching a lot of videos, so I would say I spent over maybe like, 70 hours on this?

Yeah, like 50 hours of research, 15 hours of debugging and five hours of actually writing the cold and you're happy with then I am actually very happy with my project.

Well, Eric, any final takeaways, um you know, says that he has been a big challenge for me as someone who's never had any CS background.

But I think with challenges, it kind of pushes you to always improve.

And I really lost.

And what I've learned on improved throughout the US Mr Thank you so much.

That was a great project, Eric.

And let's just see us 50.

My name's Carter Page, and we're live here from the CS 50 fair.

I'm here with Jonas Kavaliauskas, and today we're gonna be talking about his app Odyssey, Jonas, tell us about your app.

Yeah.

Thank you, Carter.

So odd to say, would ideally be a now that connects for your lands local tour guys to travelers everywhere and being in international.

I found that the best traveling experience that I had by far where I would be somebody randomly on the street or in a bar and they would take me to see the rial authentic part of the city, the city they love and know.

So maybe they'd be really into night clubbing, and we would go do that where maybe we would go and see the restaurants that no tourists ever visits on.

They're, like, really nice price that the locals get to experience.

Not so much the travelers, and that is often left to chance.

Unfortunately, and me and a couple of friends figured, well, why does it have to be that way?

Why not create a platform that actually makes a network forthis?

That's a great idea.

Let's let's take a look at it.

Yeah, absolutely.

So this is meant to be just a simple our user interface that I coded using angular GS one integrated with Ionic Framework.

And this is meant to be a user base that we're gonna be using in business bitches, and we're gonna be using in applications for accelerators and so on.

Eso it's lacking in a lot of the h damn melon CSS work.

But if we go and see there's some functionality, this is pretty sick to be, Yeah, let's take a look.

So first it has this arrest feel, and this mostly relies on the fact that there's other businesses trying to do something like that.

But the 12 13 businesses trying to do that life majorly in many regards.

And they like If you want a book, a guy there, it's gonna take you through three weeks, whereas a lot of the traveling in Europe takes place very last minute.

Uh, it's not well organized in a sense that people take on the offers of cheap airfare providers that's going to cost you 90 euros or so to fly to complete opposites ends of Europe and they have nothing organized and they don't really have to be organized option available from them.

So what you would do is you with toggle this button on and this is the travelers perspective on you would have guys appear around you.

Alternatively, you can do it as a list on and see guys, if you go to my profile a year, you're gonna have my name's of basic information about me, some pictures, you know, just to make sure that the person is like a serial killer or something, and then you're gonna have some basic metrics by which the tour guide is rated.

So the number of four hours given star rating that has been given to the guy, and then you're gonna have some thinkers are criteria by which you can find people with common interests.

So this is all made up, but yeah, And then you're gonna have a little profile saying I'm an amateur film maker, which means I can help you immortalize your experience in Paris with my camera.

And I would love to be your guide to Paris, and then you won't have the options the best.

Such the guy asked to meet up or just see their suggestions on itinerary and what they would love to show you while visiting the city.

So this is on Iowa's.

Do you have any plans for Android?

Yeah.

So this is on ionic framework originally, so you can easily transferred from IOS and nature.

Enjoy.

Unfortunately, Ionic doesn't have that crazy that common documentation, and I sort of building this lack resources online, so hopefully we're gonna find something better suited for um So what?

Your plans going forward?

So we have all these calculations in the business sign larger ready on PVS.

We launch a little MPV and had people use this service, and they really enjoyed it.

Way launch A survey that question hundreds of universities is back in Europe.

And we've got overwhelming response that this is something that the market needs.