 OK, so that's apparently the best we're going to do. Hello, welcome to the Friday Lightning Talk session. It's good to see such a large audience. We are a bit behind, and we're going to struggle to fit everyone in. So we're going to try and see what the best we can do is. For these Lightning Talks, each speaker has 10 minutes. And I'll set a 10 minute timer on this thing. And when that 10 minutes is done, we will interrupt them with a really loud, loud round of applause. And so just to practice that, if we could do a round of applause. OK, so that seems to work. So first up is Una, talking about Van Ek Freaking. Thank you. Hi, my name is Una. And I like signals. I think of this Lightning Talk idea literally on the plane here from Helsinki. So it's a Lightning Talk in many senses. It's about Van Ek Freaking. And I'm going to explain what it means. Van Ek Freaking means eavesdropping a signal that it's not supposed to be sent in the first place. Signals from electric devices like electromagnetic radiations via radio or electric cables. And it's named after this Vim Van Ek, who published a paper in 1985. But he knows this phenomenon in CRT. This place, this old type cathode ray tube, this place, they can be listened to with a radio at a distance. And you can actually see the image, copy the image, and view it yourself at a distance. So they are not secure at all. Now, some explaining needed. This is an image of my antenna that I call the Huxo. I use it to listen to 446 megahertz radios. Actually, I spent my summer holiday doing that. But I started noticing a strong interference at 446, just below 446 megahertz, at 445.49. And I was thinking, what could it be? I could only hear it in my home. So I started investigating it. And it sounded like a video signal. Now, when I told my friend that it sounded like a video signal, he was pretty confused, because how can anything sound like video? But when I was a child, I used to hook up minus the 8-pin interdome the wrong way so that the video signal was actually, by mistake, fed into the audio channels. So it made this very peculiar and very distinctive noise. And I recognized that noise immediately. This must be video. And I was actually here in the 60 hertz vertical synchronization pulse there. Now, the frequency was very odd, 445. Why would it be 445? And then I noticed, if you calculate the pixel clock frequency of this particular very weird display mode, and then once multiplied by 3, you get 445.490. So I was thinking it could definitely be a display. But how can I hear a display? So I was wondering, how can I hear a display from the radio? And shouldn't this only be applicable to CRTs? Which are analog, and I'm pretty sure nobody is using a CRT display in my home. So I wrote a little program using C++ and OpenCV. I call it JEMPEST, named after Tempest, related in some way to this kind of emanations. This is a screenshot of the SAIT program. And I'm receiving an image of the Google homepage on my HDMI display, which is situated just two meters from my computer. And I'm doing it with this small radio. This is about the size of a matchbox. It's called Air Spy R2, and a small antenna. Just to describe the image, it's black and white, and there's a lot of interference. But you can definitely see the Google logo and some browser user interface elements there. This is the result of integration from many consequential images. So I don't actually get the video feed, where every frame is this clear. But most pictures on an HDMI display are very static anyway. So I can integrate a second of times and get a pretty clear image. But the mapping from color to the signal level that I'm receiving is still a bit of a mystery. Here I have four gradients of color and gray scale. And below are the same gradients received with my radio. So it's not a one-to-one correspondence. There is the received pattern is sort of a striped pattern. So I still have a lot of things to do with this. But I'm hopeful that it will someday give me a clearer image. What I could do, I've heard the Air Spy can be set to a higher bandwidth mode some way with a custom firmware, but I haven't done it yet. Or maybe I could just use a higher bandwidth radio. But then the USB bandwidth will probably be a limiting factor at some point. Now I had the video link, but I'm not going to try it out on this because it's not my laptop. I don't know what happens. OK, I got the go ahead there. So I don't even know how many seconds I have left. Yes, hello. So anyway, this is just a video which shows basically the same thing that I was talking about. Here's my Air Spy radio and just me looking at the spectrum on a spectrum analyzer. And here's my HDMI display about the meter away from my laptop, where I view the image on this program that I showed earlier. And it says that when I scroll the page, it's pretty real time. And it has some needs, needs, hackery statistics on the left side as well. And I need to improve those. Then I also show that I can receive the image, even if the display is in an adjacent room by using a slightly bigger antenna. Actually, it's the same antenna you saw in the beginning. But this is not something you can do sneakily. It's about 80 centimeters long and has many spiky elements coming out of it. But I can still receive the image if I wait long enough. And here the text is pretty clearly visible. And we can also see the long integration time. It blurs the text, but it also removes any time-related noise from the image. The signal speed is about 10 million samples per second. OK, let's not use the next video. Thank you. That was my lightning talk. Side, can we have a blind navigation? Now they're both on. Can you please just audibly say five, three, four? Yeah, sure. There you go. Can I have a sorry? Can we have the house lights down? No. OK, well, this one. La, there. Yes, can that light be turned off? OK. Hi, my name is Sai. I am partially blind. Namely, I am super light sensitive. So I can't see anything if I'm facing this way, because that light is way too bright for me. If I were facing the other way, I'd be able to see just fine. I'm teaching some workshops on blind navigation, as well as a talk you can come to today at 4.15 by the trees in the center area. Right now, I'm going to teach you how to be an asshole to blind people with TQ, my assistant, as the example person. Now, we all know that as kids, we learn object permanence, right? So TQ, could you please pick up the bottle that you put down on the other chair? Yeah, so please don't move my stuff. If I put it down in a given location, can you pick it up? There you go. So that's step one. Step two. Consent is important, right? So TQ, stand up, and let's pretend that the edge of the stage is a curve that you're walking up to. And so we're just standing here, waiting for the light. And TQ probably has his hand on the little nub that shows when something is about to change and it's safe to walk. And I come up and say, oh, blind person, let me pull you in the right direction. Now, TQ, can you point in the direction that we were facing, the back of the tent? We were facing in this direction. Good. However, if you do this and you don't know which way I'm going, or frankly, you don't have my consent, don't. Instead, there are a couple of ways you can approach someone. Hi, would you like directions? That's one way. If you want them to know where you are, you can use the back of your hand, not the front, because that's grabby, back on arm, and just say, hi, would you like directions? Next, hint. Blind people are blind. People don't always realize this. So for example, let's say TQ, you're asking me, how to get to the pedestrian entrance of EMF? I say, oh, well, you just go that way, head straight, and it'll be right next to the white tent. That tells you nothing. If instead I say, oh, so you go out of this tent, you shoreline right. There is that tent entrance is on the right. Turn right at that. You'll hit, go straight. You'll hit the paving. Turn right on the paving. Turn left when you can on more paving. And walk along that path until you reach the pedestrian entrance. That is something that TQ actually probably can do. And I've only trained him for like one hour. If you don't know the term shorelining, just say, follow the path. Yes. So shorelining is a simple technique, which actually we can demonstrate with the edge of the stage. So walk along the edge of the stage and don't walk off of it. So to follow a edge and follow parallel is just, yeah, then we run into the wires, is a matter of following a line. So if you expect someone to cross across a open area, things aren't going to go well unless they're following you directly. If you want someone to follow you directly, the bad way to do it is this. Hey, TQ, follow me. Yeah, so if I can't hear you, I can't follow you. A better way to do it is to say, hey, TQ, follow me. Nice and audible. And all I'm doing there is just scuffing my feet. Another way is if you want to lead someone, sorry, yes. If you want to lead someone, bad way. Grab, and we're going to go this way. This is also known as a come along hold for police. Not a good thing to remind people of. Instead, offer your hand. Say, would you like to follow me? And then they can hold you on the hand or the shoulder or the elbow. And then you just walk wherever it is, and it's fine. That way, they're in control of whether they're holding you or not. Not you. And it doesn't feel like it's being grabbed. Another thing, TQ, walk straight towards me with a full sweep. So don't do this. Don't cross along the line. You can tell, blind person coming towards you, they're sweeping, they're cane. You can see me coming. I can't see you, necessarily, unless you're really loud. If you walk across the line of my cane, you're going to get tangled up on it, and I'm going to get disoriented, and you're probably going to trip. Don't do that. If you're following next to a blind person, so we're walking together, don't walk in front because you're going to be in the way of the cane sweep. And don't walk between them and a wall, or in this case, the chairs, because those are used as a reference. Instead, walk slightly behind them and to the side. So this way, I can follow TQ if he continues walking, and there's not really a problem. And yes, I have my eyes closed. I can't see shit, but yeah. So that's another, what other things have people done to me in the last week? Don't grab the cane. So if you're trying to tidy things up or something, and TQ puts his cane down, and I grab it and put it somewhere else, and he goes to reach for wherever it was, not a good idea. How would you like it if I grabbed your eyeballs? That's not an understatement, unfortunately. Also, please don't grab me by the eyeballs and point them unless I specifically request you to do that. Do not do this. Do not grab this, because while talking to you, I am also monitoring, for example, the existence of this cable so that I don't trip on it, and how far I am, and whether there is ground movement from cars and things like that. And also, this is an extension of me. It is my eyes. If you grab this and move it, you are grabbing me by the eyeballs, and I'm going to be really, really resisting putting you on the ground. So far, I have not had to do that, but please don't. So if you would like to learn how to actually navigate with a cane, I'm giving a workshop and a talk. Please come. There's information on the schedule, or s.ai slash emf. It's not all about the cane. In fact, it's a lot about sound, not as much as you might think, and more than you might think. So for instance, that tap is enough for me to know the contour of the room, how tall it is, and roughly where the door is. If you don't know why, come learn. Same thing for wind. You can feel a wall that you're next to. You can smell things. You can tell which orientation a corridor is. There's a lot of senses beyond your eyes, and we use all of them. So thank you very much. Next, please. Awesome. Hello, everybody. My name is Yuwen Lan. I'm a sociologist. I spent nearly 20 years now gaining my abilities to observe and to interview people in the Hacker communities. But today I'm not going to talk about Hacker culture. I'm going to talk about Park Run. How many people here have heard about Park Run? Right, quite a few of you. How many of you are going to run tomorrow? No? OK. Well, hopefully today's story is going to inspire you to go to a Park Run, go to a Park Run tomorrow, and then just to see the Park Run from a different point of view. And the talk is going to be based on my sociological insight. It's not sponsored by Park Run. And I put the slide very quickly together last night when my little one was sleeping. So do apologize if it's not the best slide you've ever seen. So for those of you who haven't heard of Park Run, it's a three-weekly 5K time run which are open to everyone above four years old. And it's usually quite safe. And then there's lots of volunteers and first-aiders and two first-aiders necessarily on site. But it's relatively safe compared to many other runs. And it began in the UK in 2004. And it's gained a lot of publicity and popularity as well in the past years. But this is like a mountain bike. You either like it or hate it. And then there are a lot of interesting studies on Park Run. For instance, there's one funded by Cancer Research UK in 2014. And they're looking to why Park Run is so successful for changing people's lifestyles and changing people's behaviors. But these research are done by people in the Department of Health. And they look into these citizen-led community participation and prevention. They conclude that Park Run creates active and inclusive physical culture. And then Park Run's approach can help a cross-section of participants from diverse social backgrounds as well as the people who didn't previously identify as wrong-ness. And so they did a survey and interview with people. And so basically to identify those key features for their success. But as a sociologist, I like to kind of make things more complicated. So I use this concept called infrastructuring. Turning the infrastructure as a verb and to understand how Park Run become infrastructure, become more institutionalized. So most of my research is based on the concept developed by Susan Lee Starr and Karen Ruder in 1996. So it's quite long ago. And they look into these distributed information infrastructure. So they analyze the levels of infrastructural complicity involved in system assess and designer users' communication. And they look into how things work. And in 2007, in the United States and elsewhere in Europe and there's a growing interest in understanding large-scale cyber infrastructure. Again, people are looking into the history and theory of infrastructure. So my kind of background is from my interest based on this kind of intellectual discussion. And now I'm going to summarize and share with you and the seven things I've observed about the success of Park Run. Number one, it's usually got this standard format. It's very predictable. Every Saturday, 9 a.m. start. Usually there's some variation, some local different areas such as in Scotland and Ireland or some other countries or location. And with the standard format, it's easy to set up. And for instance, there's bar codes and the tokens that you can receive. And there's also standard signage. It's very well signposted. And there's the cones, for instance. And so even the wrong directors, they are giving a speech based on the same script. They might be something different, depends on people's performance skills. But most of the time, they are saying to the people, to the wrongness, the same thing every Saturday. Second point, if you want to start the Park Run, you are offered a budget of up to 3,000 pounds. And so that is quite handy. So you know, you are not left without anything. And so you have a means. Number three, digital technologies really help over here. So there's a Park Run website, for instance, and it publishes recording time. It's a database of all the wrongness and all the time, all the activities, including volunteers. And there's mobile phone apps for scanning. And there's also mobile phone app for timing. So you don't fully rely on timer anymore. So lots of things can be automated and save time. But even so, there's lots of volunteers involved. And we have to send the volunteers and the marshal, they organize things, they ensure everything runs. And also the community is supported by lots of entertaining things, such as podcasts. And there are a lot of different series, including Free Weekly Time, Park Run Adventures, the Park Run Show, or With Me Now. And there's also some related talk, such as Morrison Talk. And these are some photographs I've taken. These are the wrong director. They are putting the time into the database and so the wrongness can receive their time. It's actually quite laborious. And so no doubt that it's a hard job. And then also volunteers signing in the rent and then try to marshal wrongness. So the community is a huge thing behind. And over here, I just like to highlight there are different kind of volunteers. So for instance, over here, the volunteer, it says Dave volunteers. So they do the sign language for the wrongness. So if you can't hear the wrong directors talking, then at least you can see the sign language. So it's quite interesting. I've seen it in two different Park Runs now, one in Edinburgh and then this one is in Plain near Stirling. And number five, you've got support from public authorities. It's got recognition from the public authority. Like local councils allow the wrongness to use the park or NHSGPs or nurses and prescribe patients to do the Park Run. So that help as well. Then branding is another big thing. So for instance, Park Run has got this very pretty logo and it was a different, it looked different before. And then they've just recently kind of rebrand themselves. And so the token, for instance, look different now. They've also got sponsorship. It's increasing, for instance, Fitbit, a lot of other support equipment. They also sponsor Park Run. And over here is a local Park Run at Volcker in Scotland being sponsored by Victoria Harries. So different Park Run and get different sponsorship. And the last thing I think is very crucial is because it's free and then people don't have to pay to do a marathon or to do a 5K every week. So that's reason why it's relatively attractive to a lot of people. So however, from the sociological perspective, sociologists like to make things complicated. So we like to look into controversies. So for instance, there are lots of issues that we don't usually pay attention to, including for instance, what stop people from attending. It could be people might have their caring responsibility that for instance, I have to find somebody to my children, otherwise I won't be able to do a Park Run every Saturday morning. And there's also our people, if you are disabled or blind, for instance, and how do you take part in, if this is really good for your health and then how do we encourage more people to take part? How do we encourage more people to become this community? What do we mean by community anyway? And so it's quite interesting to look into, for sociologists, to look into different kinds of localized practices. For instance, how the tokens were received in different Park Runs, so different communities have different arrangements. So for sociologists, this kind of helped me to understand. It's very interesting and helped to move beyond the asymmetry and neutrality of Park Run so we can problematize a Park Run. So my time is nearly up. I'd just like to say that tomorrow morning, there will be a few people going into this tweak-a-bree, maybe my pronunciation is not right. It's Park Run and then people are going to leave the EMF campsite around eight o'clock and then there's a weekly page about the Park Run tomorrow. And I would say Park Run is like a mobite and you don't have to run it, you can walk the 5K as well. There will be the tail walker in every run and then you don't have to worry that you won't be the last one because there will be the tail walker. We'll be walking either with you or behind you. But if you don't try, you won't know if it is something you would like or hate. So I would kind of encourage you to come to the Park Run tomorrow. Thank you very much. Thank you, that was a feeble clap. So our last lightning talk should be Dan Williams. Cool, I have your slides. Great, thanks for being here. Hi everyone, I'm Dan. And this talk is essentially a slideshow of photos from a recent holiday of mine. A while back I became interested in radio quiet zones and I became quite fascinated with them. And they're these places, geographical spaces, where because there's something special in that place, they don't want any man-made radio signals to be transmitted there. There's a few around the world for different purposes, some for like military surveillance monitoring purposes, some for radio telescopes. There's some in China, South Africa, Australia. And the most famous is this one, the US National Radio Quiet Zone. It's 100 miles by 100 mile square in West Virginia in the Allegheny Mountains. And in this zone, you're not allowed to use FM radio, TV signals, wifi, mobile phones, any kind of artificial radio signal is forbidden. And this zone exists for two different facilities. There is a military base and there's a radio telescope. And in this space, the kind of priorities of how we use radio is different. Normally, we prioritize like people communicating. In this case, there's a different priority. And so when I got interested in radio quiet zones, I did what I normally do when I get fascinated by something. I set up a Google Alert. And I found that there's like three main things that people write about radio quiet zones. There's like academic papers with like research results, which I have no idea what they're on about. There is the second type, which is the results from people searching for alien life because they like to use these radio telescopes. And there's the third kind, which is every about six months, a mainstream publication like, say, The Washington Post or the BBC go to the US National Radio Quiet Zone, never one of the other ones, always this one. And they can write basically the exact same story every time. They write about how this place is like trapped in the 1950s that you can't like, you know, text your friends, you have to use landlines, you have to use post. You can't even like turn on the TV. And they always also, as well as profile what life's like there for normal people, they always profile the people who come there because they are allergic to wifi or phone signals. Yeah. And it kind of has the same template. And I thought, this place looks fascinating. I want to go back to like 1950s pre-technology America. So I went on a road trip. Luckily, I had two friends who were heading there, Tom Scott and Matt Gray, who were doing a video for YouTube. I was just going along as a tourist and like kind of tagging along. And it's this like wonderful, eerie rural place. It was like covered in mist as we drove the hundred miles into the square. And there are like only the two sites to see. There's the military base, which has shut down and is now for sale. So if you can convince the estate agent that you're in the market for it, you could go visit it on an open day. Unfortunately, I couldn't do that. So we went to the other place, Green Bank, which is the home of the radio telescope. It's got the telescope, the Robert C. Bird Radio Telescope. It is the world's largest steerable radio telescope. It's named after the former senator of the state, I believe, who was really good at getting government funding for stuff. So everyone's a big fan of him. And it's massive. Like I'm not sure I can convey how big it is. There are other radio telescopes on the site. This one dwarfs over them as you climb up it. It's kind of got this kind of weird pixelated vibe. It's made up of like hundreds of little panels that are individually steerable to fine tune the signal. And it's so big that this is how big the nuts and bolts it's made of are. As well as being like quite enormous, it's incredibly sensitive. When you get near it, there's a buffer zone around it where you can't enter without permission. They don't allow, say, petrol vehicles near it because the spark plugs in the engine create too much interference. It's so sensitive that this poster, which looks like it's made in MATLAB next to the telescope, warns you that even turning on a digital camera next to it can be picked up by the telescope in their results. Which means they've got a special van, the radio finding van. This is the van that they drive around the zone filled with radio receiving equipment. So they can track down any interfering signal. So if you've bought a Wi-Fi router inside this zone, they will come to you and find you. But largely, most of the interference doesn't come from other people in the zone. It comes from the facility itself. As one of the staff members told us, they are their own worst enemy. The actual instruments they put on the telescope cause interference. So they've got a team of people and an anechoic chamber. And what they do is they take the scientific instruments that researchers have sent to them and they'll build special boxes for them that won't cause interference. And the campus itself doesn't really have scientists, physicists, people doing research. It's mainly like an engineering facility. It's people fixing the telescope, building the telescope, writing the software to control the telescope. It's basically like any engineering department and university. There's workshops and labs and lots of academic papers stapled to the wall. And as you walk around the facility, you can't really feel any different from like if you're in a non-radio quiet zone. It's pretty much the same, apart from these weird traces you bump into. Like in the canteen, the microwave has this really beefy metal box around it so that it doesn't cause interference. They earth their toolboxes. There's landline phones and phone books everywhere. No one will mind you asking to use their phone. At one point, as we were walking around the office building, an announcement comes in the tannery saying, Mike, Mike, please contact the front desk immediately. And someone leans out their office and goes, Mike, what have you broken this time? There was someone we were trying to meet up with. And we were like, oh, is that person meeting us at three? And they were like, I don't know. We've got to go back to my office to check the email rather than check it on their phone. But like throughout the day, it kind of slowly appeared that this kind of like complete ban on radio was slight exaggeration in the stories that we'd read. Like when we crossed into the zone, there wasn't like a sign telling you turn everything off now. Like it was like a multi-lane highway. We stopped in like a McDonald's that had free Wi-Fi inside the zone. There were entire towns and cities in there. And it's not even like a hard, isolated place to get to. It's got like a visitor center and a gift shop and like a viewing deck. So it's kind of not quite as I had imagined it in my head. I even took like an SDR radio and plugged it in next to the telescope and listened to see what was there. And you could like see like emissions from people's mobile phones, like people hadn't switched their phones off there, which made me feel better about the earlier on in the day. And when I realized that like that's my Fitbit on them that I used the wireless fob to close the car door. And as we were chatting in the control room at the end of the day, staff members were starting to like tell us about all the different like wireless things that they had at home that they really shouldn't. Everyone does so who cares kind of thing. And one of them mentioned, well, it's not like a forbidden zone. It's kind of more of a carefully managed and regulated space, but that's like a less catchy headline for a newspaper. Or as the sign in someone's office said, radio frequency management is done by experts who meld years of experience with a curious blend of regulations, electronics, politics and not a little bit of larceny. They justify requirements, horse trade, coerce, bluff and gamble with an intuition that can be taught other by long experience, which I'll be honest, makes me love the place much more than just a total outright ban. I love that they've managed to still make a balance where you can live a normal life, yet prioritize radio research. Thank you. Okay, thank you everyone. That was the final lightning talk for today. There is still space in the lightning talks on Sunday if somebody has become inspired. And just finally, could we thank all of the speakers just once again?