WEBVTT


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[Speaker 0]: You can hear us. Can you perhaps do it for

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me? Great. The little angels in the

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background have done it for me.

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So now finally that everything is ready.

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Hi James, how are you doing?

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Good morning. Hello. Well,

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thank you for your talk and sorry for the

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little hiccup at the middle we had to pull

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out a fire with the audio going out in the

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middle and sorry about this.

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[Speaker 1]: It's no trouble.

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[Speaker 0]: So James, you've obviously told us about your

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very fancy setup with the green screen and

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I'm sad to see that you haven't put out the

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green screen for your BBB session right now.

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Do you have it in the background just for

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you? Right, okay, it wasn't that far.

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Great. So I'm just going to ask,

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so this is the first live Q&A that we have

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for the session so things might be coming

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into place so pardon us if we take a little

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bit of time to put the questions on the

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screen and all of this.

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What I'm going to do, I'm just going to load

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up the pad. I would invite James to also open

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the pad on his hand. So yeah,

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I've got people talking in my ears and it's

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been a while since I've last had this.

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And okay, so opening the talks right now,

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opening the pad if I can find it.

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Open up the pad. Okay.

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So have you got a pad open on your end,

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James? So I can read the question.

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So, okay, great. Opening it on my end as

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well. What I'm going to do,

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folks, I see some of you have joined us.

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I'm going to start doing is first taking

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questions in the other part because it's a

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little faster to ask questions like this.

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And then as soon as we've finished,

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feel free to unmute yourself and ask your

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questions. All right so I've got some

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reactions about OBS being cool and yes both

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James and I will be able to tell you that

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it's very cool we do very fancy stuff like

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when I need to talk to production in the

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background and all the stuff obviously that

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James has been able to show you with a green

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screen. So I don't see a whole lot of

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questions so far. I see a lot of reactions on

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publishing lectures book and of a classic

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example is John Kitchens obviously.

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Pedagogy first developments.

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Macros are a cool idea.

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Okay questions. So how do you overlap

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yourself with a presentation.

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It's so cool. It's quite simple.

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[Speaker 1]: OBS provides filters for every...

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You can have a separate filter for each video

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feed and 1 of the filters that's available is

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chroma key. You just choose a color to make

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transparent and just make sure that the

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webcam is at the top of the composition.

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And the thing that surprised me the most was

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how quickly my brain was able to mirror

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everything and control my body from a

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separate point of view like the way weather

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broadcasts are done. It took seconds to be

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able to do that. Well,

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and now I have years of practice because that

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set up that you saw that I used to record

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this video. I used for years during the

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pandemic for 4 or 5 semesters to because my

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courses are all have 2,

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3, 400 students, except for the English

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class, which has, you know,

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30 students. And so during the pandemic,

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and even after lockdowns were no longer

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mandated, I taught online just because I

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didn't want to have so many students in the

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room at the same time.

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So I've yeah, I'm it. I have a lot of

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practice doing that.

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[Speaker 0]: But it pays off because it looks so natural,

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you know, it feels like it's the same thing

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with weathercasters, you know,

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it sounds very it looks very easy to do,

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but it also takes quite a bit of practice.

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1 of the things that you also need to

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remember if you're using a chroma key that

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James has explained is that you need to have

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very good lighting, basically for the color

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to pop out in the background and for your

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body to be easily highlightable.

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Okay, were you finished with this question?

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[Speaker 1]: Yeah, let's take another 1.

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[Speaker 0]: Sure. So how do you deal with video in Beam?

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I found it so hard to do that.

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PPT on the other end is easier to achieve.

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[Speaker 1]: Yeah, so remember that the slides get

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produced from Org Mode as PDFs.

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Well, and in fact, I even before when I was

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using other software to produce slides,

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I produced them as PDFs,

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precisely because I wanted to be able to mark

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them up on on the screen with the stylus.

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And so I don't do video in the slides.

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I use OBS to switch from static slides that I

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mark up with the stylus over to some kind of

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video viewer and then back.

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And again, that's how I can use Firefox.

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I use OBS to switch between Firefox and video

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and the Shornell plus plus program where I

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can mark up slides. So those functionalities

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are that's why I use different software and

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pull it all together with OBS so that I can

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have lots of functional flexibility.

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[Speaker 0]: Great. Do you ever use things like

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org-present and stay for the PowerPoint

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slides? I'm not sure exactly how to read this

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particular question but at least we can focus

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on org-present. Are you familiar with what it

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is?

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[Speaker 1]: I have played around with org-present and

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again I guess you could use org-present to

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show images and to show headings as slides.

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But again, because I'm it's such a crucial

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functionality to be able to mark them up with

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stylus. I didn't really show this very much,

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but I also highlight things the way I would

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highlight using a laser pointer on the

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screen. And again, I don't see Emacs being

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able to do that for another couple of

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generations. So really the only thing I use

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Emacs for during presentations is to narrow

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headings that we can focus on particular text

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excerpts.

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[Speaker 0]: Right. Yeah. A lot of our presentation at

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EmacsConf are usually,

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especially the Org Mode ones are done with

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OrgPresent. And. Sorry,

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I had again someone talk to me in a year.

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You know, the problem with EmacsConf is that

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every year, you know, you have to relearn a

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lot of skills. And by the time we finished by

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Sunday evening we are masters of it and then

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we forget everything by the time the next

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year comes around. What I was going to say is

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that org-present is often used by people

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inside Emacs conf presenting about org-mode

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but yeah whenever you need to do something a

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little more visual, it gets a little more

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complicated. Some people have tried to do

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fancy stuff with SVG, which is probably the

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path forward for this type of stuff.

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But yeah, if you need to draw,

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if you need to highlight,

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it is pretty complicated.

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Perhaps something that you might want to be

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interested, James, in checking out is PDF

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tools, which is a way to open up a PDF in

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Emacs. And this allows you to have basic PDF

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annotations, like putting a little bit of a

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Nikon on it. Perhaps you've already played

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with it.

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[Speaker 1]: I have used that. PDF tools is an incredible

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package but until it allows me to make a mark

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on the screen that shows up in a video

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compositor. It's not going to replace

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Shortenel.

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[Speaker 0]: Definitely. All right.

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Moving on to the next question.

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Is the triple-accolade syntax an Org Mode

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core feature that I missed so far or did you

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program that and thank you for the great

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talk.

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[Speaker 1]: Thank you very much. No,

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it's just part of all of the export backends.

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Actually, I think the way it works is it

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precedes all of the export backends.

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When you export, the first thing that happens

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is expansion of macros.

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And that's a built-in org mode feature.

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It's definitely beyond my Emacs Lisp powers

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to be able to have made something that

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powerful. That's right.

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I have come a long way.

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[Speaker 0]: For now. You know, we always,

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you know, most of the people who show up to

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Max Conf. Especially talking about stuff that

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has to do with presentations or what they do

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in academia. You know,

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they always say, oh, but,

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you know, I couldn't have done all this,

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you know, it's just far away.

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And then they come back 1 year or 2 years

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later and then, oh, I've made my entire

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library for presentation and stuff like this.

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So Be hopeful about what the future holds for

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you in terms of coming up with crazy new

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features for the entire ecosystem.

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[Speaker 1]: Well, let me tell you,

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since the pandemic, I have written,

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I wrote my first major mode.

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It's trivial, but it provides functionality

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that is very useful to me and it's it's going

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to sound like I'm just trying to butter

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everyone up but seeing a lot of the names in

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the IRC channel people who have taught me so

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much on their YouTube channels and in their

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blog posts and on Reddit and on Mastodon.

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Without many of the people who are here today

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watching my talk, it's very fun to have

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people who have helped me learn so much about

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Emacs. So thanks to all of you.

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[Speaker 0]: Well, and yeah, and now you're becoming part

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of this crew of people inspiring others to do

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very much the same. So thank you for joining

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[Speaker 1]: Thank you very much.

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[Speaker 0]: the crew. Great. Moving on to the 2 last

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questions and then we'll open up the mic to

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other people on Big Blue Button.

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What kind of comparative feedback are

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students giving you regarding your approach?

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[Speaker 1]: Oh, my gosh. Students were ready to during

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the pandemic especially when most of the

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courses were just being taught over zoom by

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people sharing their screen.

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[Speaker 0]: Just a second. Sorry. Sorry for the

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interruption. Very rude interruption.

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We've got the intro for the next talk playing

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and I'm not sure what's going on.

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Give me just a second.

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Sasha.

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[Speaker 1]: Okay.

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Yeah, I think it's started.

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Okay so yeah I think it's not a

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[Speaker 0]: sure 1 I got the times wrong apparently

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because of the little delay we had getting

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the audio fixed up. The good news is that

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we're still recording the talk right now and

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we still have James around.

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Obviously James you're no longer on being

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broadcast on General but if you want to keep

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answering questions or if you want to anyone

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in the room right now wants to ask you

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questions feel free to do so.

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I'm going to need to hop off because I need

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to get other things ready for the next talks

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[Speaker 1]: But James, thank you so much.

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[Speaker 0]: sadly. Right and so sorry I'm a little tense

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obviously because I was not expecting this to

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happen and that led to a very abrupt end to

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this discussion but people afterwards on

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emacsmo.org slash 2023 slash talks will be

00:12:21.980 --> 00:12:24.020
able to find all the content here.

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So I'll have to leave now.

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Thank you so much James for doing the

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difficult task of opening up EmacsConf and

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I'll probably see you later.

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[Speaker 1]: Thank you, Leo. Bye bye.

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[Speaker 2]: On your journal program.

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Yes. You are using the tablet as a monitor,

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right? Touch screen monitor with that?

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[Speaker 1]: That's exactly right. So it's a tablet so you

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know I can. It has a touch screen and so.

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So basically the functionality that that

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program provides is to be able to just mark

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up PDFs with a stylus,

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you know, in the way that you would use any

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other tablet. And to be able to take that

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video signal and put it into another machine.

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That was the that was the key.

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That's the killer app.

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[Speaker 2]: I've thought about grabbing 1 for the purpose

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of like changing my laptop into a tablet to

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read manga, browse the web and kind of

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curious if it works well like as a wireless

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monitor with a tablet or how well it like you

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can use Emacs with it in a tablet mode or

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were you just

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[Speaker 1]: or you just use the tablet that I use is this

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is it it's just a Microsoft Surface and so it

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comes with a keyboard so you can take the

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keyboard off. Yeah, but I use it.

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I use it with the keyboard as well.

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And I just.

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[Speaker 2]: You're cutting off right now

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[Speaker 1]: Audio Your audio is cutting off right now.

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I bumped the mute button on the mic.

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Yeah. So again, this is,

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[Speaker 2]: is the 16 mute buttons you use.

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[Speaker 1]: this It's just the surface pro 3 that I got

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used and it runs Emacs.

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I mean it runs. You know Linux really well.

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And the trouble is that the hard drive you

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know the SSE drive is small and the RAM is

00:16:02.920 --> 00:16:06.920
small, but it works for the purposes.

00:16:07.580 --> 00:16:10.080
Basically, if I had a couple thousand

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dollars, I could probably buy a touchscreen

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machine where I could run everything on it

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and do the streaming and do the video capture

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and do the PDF markup.

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But since both of these are so,

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the hardware that I use is so old and cheap

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and weak I have to split it across 2

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machines.

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[Speaker 2]: There's also a beauty in making the stuff

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having specific purposes for specific things

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where it's just not. Yeah it's like I don't

00:16:46.020 --> 00:16:49.840
want a smart TV that plays Netflix I want a

00:16:50.140 --> 00:16:53.860
smart TV that has all the smarts that I turn

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my smart TV into a TV monitor I don't want to

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yeah

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[Speaker 1]: I totally feel that ethic I totally I totally

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feel that ethic. Oh, on

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[Speaker 2]: the some other things like if you want you to

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do highlighting in an org mode document.

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You can use org web tools.

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I wrote this in the notes,

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but you can use org web tools to download a

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web page and then you can use org remark to

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start highlighting in the org mode web page

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and then because an org mode document now you

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can just edit it directly.

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If you want other people to join in on an

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Emacs session you could use a package like

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what's it called? CRDT.EL

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that will allow 2 people with 2 different

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Emacs configurations to edit the same buffer.

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And you have a host that can host a buffer

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too. It works with, and they have 1 optional

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extension for org mode that will synchronize

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the folding of the org drawers.

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[Speaker 1]: Interesting. I will look into that.

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Like

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[Speaker 2]: having I don't like if you want students like

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you have each highlight line mode these are

00:18:25.740 --> 00:18:27.620
just some ideas like you can have like

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highlight line mode so people can easily see

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which line you're on cursor tracking and then

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you can have other people join in students or

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[Speaker 1]: yeah that's just a possible idea.

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Is there anyone else in the in the big blue

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button room who has a question?

00:19:01.360 --> 00:19:03.280
All right, I'm going to go over to the pad

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and see if there are any pending questions I

00:19:05.280 --> 00:19:07.560
can address. Thanks, Plasma Strike.

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[Speaker 3]: Yep. Which could be PDF,

00:19:33.340 --> 00:19:36.680
could be Markdown, could be OpenOffice,

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could be a notebook format.

00:19:40.960 --> 00:19:43.340
This methodology was conceived by Donald

00:19:43.340 --> 00:19:51.980
Knuth in 1984. The main purpose of literal

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programming is not only to make code or

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documentation or output more manageable,

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but to allow humans to create a data story to

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be used from a single source.

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What you see on the slide on the left-hand

00:20:06.300 --> 00:20:09.400
side is the story and code inside an org-mod

00:20:09.400 --> 00:20:14.440
file. The file starts with some

00:20:14.440 --> 00:20:17.720
documentation, then you write back down this

00:20:18.420 --> 00:20:22.060
code, and at the bottom you see the output

00:20:22.060 --> 00:20:26.540
file, which is not shown in the slide itself.

00:20:26.800 --> 00:20:28.440
In the middle you have the source code,

00:20:28.440 --> 00:20:33.980
which is the result of tangling or opening a

00:20:33.980 --> 00:20:36.880
buffer inside offload.

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On the very right hand side we have a PDF,

00:20:42.580 --> 00:20:47.740
actually this HTML, very same file that you

00:20:47.740 --> 00:20:48.960
see in memory language.

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So the humans look at some of this code and

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the machines look at other parts of the code.

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I actually did all my programming in the

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literary world even in the early 1990s,

00:21:00.920 --> 00:21:03.040
not using Org Mode, which didn't exist yet,

00:21:03.040 --> 00:21:06.160
but using Norman Ramsey's Norep preprocessor.

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They still use it inside the Org-Mode today.

00:21:10.400 --> 00:21:11.920
This preprocessor, Norep,

00:21:11.920 --> 00:21:14.240
allows you to tangle code from within an

00:21:14.240 --> 00:21:16.360
Org-Mode file that is self-standing file,

00:21:16.360 --> 00:21:18.820
much like Org-mode's edit functions,

00:21:19.540 --> 00:21:21.900
which export code blocks into buffers in

00:21:21.900 --> 00:21:23.540
whatever language the code blocks.

00:21:25.940 --> 00:21:28.760
In data science, these interactive notebooks,

00:21:29.640 --> 00:21:32.776
in 1 of the interpreted languages like Julia,

00:21:32.776 --> 00:21:34.680
Python, or R dominating?

00:21:34.680 --> 00:21:37.420
The basic technology is that of Jupyter

00:21:37.420 --> 00:21:39.840
notebooks, which take their name from Julia,

00:21:39.860 --> 00:21:43.040
Python, and R. And these notebooks use a

00:21:43.040 --> 00:21:44.880
spruce-dark shell, for example,

00:21:44.920 --> 00:21:49.240
IPython, and an option to add SQL cells.

00:21:50.460 --> 00:21:53.340
All good inside Emacs has a large number of

00:21:53.340 --> 00:21:56.800
advantages. Some of them are listed here over

00:21:56.800 --> 00:21:59.180
these notebooks. 2 of these stand out

00:21:59.180 --> 00:22:02.860
particularly. Different languages can be

00:22:02.860 --> 00:22:05.640
mixed as shown in the image.

00:22:06.460 --> 00:22:07.700
While in Jupyter notebooks,

00:22:07.920 --> 00:22:10.900
a notebook is limited to running a kernel in

00:22:10.900 --> 00:22:14.440
1 language only. The content of the notebook,

00:22:14.440 --> 00:22:16.980
its document code or output part can be

00:22:16.980 --> 00:22:19.020
exported in a variety of forms.