good morning well you know i'm always surprised to see how many of you make it up this early here you know i know it's been a short night well a long night short nights depending how you look at it um it's it's great to see you here are you ready for one more day of fantastic sessions yeah today will be a little bit shorter than the other days i think everybody is uh is running out a little bit of energy well not apparently not yet but uh we know that's you know things slow down a little bit and so we're going to have the closing session this afternoon the closing session is the place to be if you want to know where the next european conference will be it's also the place to be if you want to know what percentage of the people in this room are coming from your country it's going to be a very exciting moment and then after that we are going to have a break and in the evening at nine o'clock we're going to come back in this room for the druple trivia night the druple trivia night if you uh if you haven't been there before it's a it's a druple contradiction it's organized by uh druple ireland and it's a well a lot of fun and you get to win prizes you get to win books t-shirts lots of stuff um but in case you don't know that much stuff about druple and you might not get to win a book at the druple trivia night we also have the bookstore downstairs who here has been at the bookstore okay oh it's you know a good amount of people i was worried that you know it's a small room there uh most people might not be aware of it but there's a lot of the major druple books that are in the market that you can buy there they're cheaper than what you can get online i mean it's cheaper than amazon.com which free delivery um and it's all the all the the money uh goes uh goes directly to the to the people who made these books so it's it's definitely um it's definitely a good deal there one thing that happened yesterday uh is moche in this room it must be somewhere i i don't know so i think most people know uh moche uh white man he forgot his eyeglasses in the qv a uh room so if anybody found them yesterday after the last session um make sure to get them back to him or get in touch with us and we'll get them to him there's another person who also lost something and this was a little bit more unfortunate uh because apparently a laptop was stolen yesterday um we have a very open community it's we have a lot of friendly people but unfortunately there are some people who still do that uh who still do that kind of things so if if you took that laptop and you feel like you know maybe you should return it please do and everybody else please make sure that you keep an eye on your belongings uh we have a lot of people here uh there's people coming in and out um yeah keep an eye tomorrow the conference well the the sessions are are going to be over but uh we are going to have the contribution sprint contribution sprint has been uh has been described by some people as the most valuable part of Drupal con because you really get to work hands on with the top experts in the Drupal world on Drupal core on the future of Drupal it's also a great way to get involved if you have never written a Drupal core patch if you are not sure what the procedure is like if you are not sure how to work with Git there is a dedicated team that is going to walk those of you who wants to get involved but don't know exactly how they're going to walk you through all the steps it's again it's a lot of fun it's a very nice atmosphere and it's also going to be right here in this room and I think I covered most of the things and now we can go to the topic that everybody uh is is here for uh the keynote for the keynote we're going to do the same thing that we did yesterday for the questions we are going to ask them on twitter using the hashtag ask fab and something that I didn't mention yesterday is that there's two people who are collecting these these questions these people are people that you've been interacting with in a way or another without knowing it so we have paul johnson who's at the back of the room there and he's been doing all all the things that have to do with social media for Drupal Khan he's been the one behind the at Drupal Khan account he's been a fan doing a fantastic job and he's going to be the one collecting those questions putting them together in collaboration with yours duke prizda who is the lead of our content team so he's been coordinating all the track chair meetings and a lot more and he will be the one to come on stage again to ask those questions to fabien fabien potentier is to most of us he's known as the french man who created the symphony project so he is indeed french and he has let me know before when we're setting things up that he is also very attentive to his hairstyle and he said that he is very interested in testing out some very strong industrial strength putty that there's been some rumors about so dris please get in touch with fabien i think there's some potential for common ventures there but at the same time well you know most of all fabien is a passionate entrepreneur he's someone who fell in love with open-source software as a way to change the world please help me welcome fabien potentier good and morgan everyone welcome welcome to my session thank you for coming i'm really excited to speak today at my second drupal conference and drupal conferences are very impressive for me probably because you know so many people here in the room so many people excited about and committed to drupal that that's really awesome so as you might know i'm the creator of symphony which is a php web framework and you might as you might know now drupal is going to use some of the symphony components so if you don't like this change i'm the one to blame and if you like the direction drupal 8 is taking which i hope really then you will probably still still be able to blame me at some point when you know when you eat the first bug in drupal 8 which is obviously related to symphony and i'm not kidding i'm quite serious i mean you know for the lower architecture of drupal now you can rely on other developers on another community and i think that that's great and of course symphony will probably also benefit a lot from you know drupal and and the drupal community but that's not the topic for today i'm not going to talk about drupal i'm not going to talk about symphony i'm not going to talk about php of course a lot of the examples i'm going to talk about today i are more or less related to these technologies and at the end of the session you will be able to ask any questions and please if you have questions related to symphony or to drupal or you know the the association between symphony and drupal i will happily answer them at the end of my talk so today i want to talk and yeah this is the hashtag you want to use on twitter so today i want to talk about the people working for the web you me web developers web designers project managers you know all those people who are probably passionate about their job passionate enough and also you know those people have great responsibilities and they also have a unique opportunity to change the world and hopefully in good ways so a lot of people keep asking me how i've learned everything i know how did i learn you know how to code um how did i learn about all the web development best practices about all the best um design patterns and so on so that's a bit tough to explain but my experience is probably not reproducible by by everyone but anyway i want to share what worked for me so to begin with uh you have to understand where i come from i have no computer science degree per se and anyway i started to add computers when i was very very young so let me start with a story about how it all started with me for me it was christmas um 1984 so i was still very young i was um 11 years old at that time and i had this one dream getting my first real computer and we were lucky enough to have some computers at school at that time it was not that widespread but owning my own computer was one of my dreams oh for the younger in the audience you must know that the early 80s um uh was really the beginning of the computer um the personal computer area so owning a computer at that time was you know not that widespread and just adding access to a computer was not that easy at that time and Santa Claus was kind enough to deliver a computer to me and my browsers for christmas 1984 i got an amstrad cpc 664 with a color monitor amstrad computers were very popular at that time at least in europe and um the cpc um 664 was probably one of the best computer available at that time and i even had it even had uh an internal floppy disk drive yeah can you believe it yeah you know not a computer with you know a regular cassette tape deck but a real floppy disk it was so fast i was really in heaven and have a look at the keyboard even today i i found it beautiful no and actually this is the only old computer i still have at home anyway so we started to get it out of the box um we removed everything from my desk in my bedroom we plugged the screen and and the keyboard and we were ready to trade out we were so excited after switching the machine on now this is not a windows blue screen of death so here is what you add this is the very first experience with the computer you add i want to stop on this screen for a moment by default when booting the machine you were on the command line right but more interestingly you were able to start coding right away you were able to type instruction directly and thanks to the built-in you know text editor ide whatever and the building basic language and you can see you know the line basic 1.1 it was built in um that was really awesome you didn't need any other software no ide no text editor no compiler nothing everything was built in just type your program run it debug it and save it on disk that was all and as a matter of fact the user manual was about 50 pages and everything was very well explained i read the the book for for this keynote and it was really really well actually it took me less than five minutes to relearn how to do what you just see on the screen yeah i've done the demo this is um you can do the same on cpcbox.com but you know i didn't have time to create a disk and format the disk and so um and beside the basic language you also add access to the logo language where you it was really easy you know to draw lines and circles and so on it was really very fun nowadays when you buy a machine getting ready to code is not that easy anymore i think we need to learn something about that how can we make the learning process easy and fun again and recently there have been some great initiatives going on on that side there is code academy.com for instance but i think that the new computer science section of the can academy is just awesome by the way how many of you have already heard about the can academy okay not that many so the can academy is the story behind the can academy website is it's just amazing one that proves that one person can change the world thanks to the web and is not even a web developer so the founder was working for edge found and during his spare time he was helping his cousins with math problems and at some point because he was helping so many people in his family he started to record some videos and he posted them on youtube right so that everyone could watch them easily and all the videos were public actually and more and more people started to watch those videos and he started to realize that he wasn't to something but instead of creating a company remember he worked for edge found he created a non-profit organization instead and that's the can academy if you want to know more about how he got started and the or sorry i only recommend you to watch the video on ted he did a talk on on during the ted conference so go to ted.com and it is quite interesting so the can academy announced a new computer science section i don't know some days or weeks ago and it's really awesome basically it allows you to start cutting in the browser with javascript and the experience is just amazing with you know there is a video explaining everything uh the fact that you can't you know try everything out you put your cut on the left you see the the result on the right um so you have immediate feedback so there is a small snippet of the first video let's start out by learning how to draw some basic shapes with code it's really easy if i want to draw a rectangle for example i can just type rect which stands for rectangle and it's open parentheses and then four numbers separated by commas then closed parentheses and semicolon ta-da and if you're thinking what the heck did she just do then good that means you're thinking this thing right here is a function call now a function is kind of like a special ability that your computer has so if you have a great this is exactly the same experience i add more than 20 years ago with my amstrad right the only difference is that i had a blue screen now the screen is white it was basic it is javascript now but this is exactly the same experience i think this is a great initiative and i think it can help a lot of young people get started faster with computers and you know without the hassle to install a lot of different things to be able to start cutting so thanks to my amstrad i learned to cut very early in my life and it was quite easy to get started but as far as i remember becoming a programmer was never one of my dream jobs i think it's because for me programming has always been about having fun trying to solve problems finding solutions to these problems learning new things being able to make the machine do stuff for me right um i like you know challenges i like to explore new worlds so i've always seen writing code as a hobby and not really as a job and when i grew up i started to think about you know creating my own company because being an entrepreneur was my dream job actually so that's what i did at school i created my own company which is about web development and as such i'm quite interested in understanding how people decided to choose um a web related job from my experience as someone who hired a lot of you know web developers and project managers very few people actually wanted to do a web related job in the first place as essential we have people having so many different backgrounds and that's very rewarding and really interesting and a couple of days ago i asked this question the question about your dream job on on twitter um but the question was target specifically for women why because they are underrepresented in our industry and i don't really understand why this is the case i mean at least women are underrepresented in in france in europe probably in the u.s and i know that this is not the case everywhere in the world it's not so this is probably um you know related to some cultural issues and if you ask me we need more girls in our industry we need more girls doing web related stuff why you know they have a different approach to solving problems and that's a good thing it helps a lot to have different point of view different perspective for the problems we have to solve so i got quite a few answers to my question and they were quite interesting some of course were already interesting in doing um in working for the web but the vast majority of them were dreaming of something else and the most popular job seems to be astronaut yeah that is quite surprising and architect was also quite popular and i think it makes sense you know a good developer must also be a good architect so you work for the web you are a freelancer you are working for a big company you are probably working for a small web shop but you are all working for the web and you are all using open source software obviously but why why have you chosen to work for the web and why on earth have you chosen to work with open source software i mean this is a great choice no question about it but working for the web is not an easy job that's for sure the web is evolving at a very fast pace the technologies are changing all the time so this is a very demanding job with very few rewards so because working for the web is so difficult and exhausting at times i would even say that working for the web cannot be considered as a regular day job right when i say day job i mean something you do for all the money not necessarily for um because you love um um the job and when you do something you know only for the money you tend to limit your involvement to what is required for the job to get done and to be a good developer you need to do a lot really a lot i'm also a web developer but this is definitely not my job i've been programming for the last 25 years because programming is my passion and i think this is how it should be for everyone working for the web is more a passion than a job if working for the web is just another job for you you are going to be in trouble i can tell you why because the web ecosystem evolves very fast you know in the old days probably um the first half of the last decade developing a website was really easy you had to learn some html perhaps some mysql and php and you know that was really easy and hosting such websites was also straightforward install php mysql apachita or choose from the many hosting companies that provide the same for a very cheap price but it was a time where you had limited choices and the majority of people chose the same stack anyway the famous lump stack and the bad news is that most of the time this is not true anymore the web is becoming more complex every single day and of course now you want to scale your website to handle more traffic you want to benefit from the latest innovation and the current best practices so it was you know ajax everywhere some years ago it is about the web sockets nowadays the rich client again with javascript the possibility to handle more than one devices the dev ops movement and so on so we are now in a world where you need more techniques and more software even for the simplest websites and it's not going to stop quite a country and that's why i love doing web development it's great to be part of the web revolution you can and you probably should literally learn something new every single day this is really exciting and of course open source helps a lot here it has never been easier to learn new stuff it has never been easier to have a look at others code and learn from it and if we are talking about web design i think this is the exact same story the possibilities nowadays are you know almost overwhelming we started with a very simple simple web pages yeah we talked about pages some years ago with a very limited html language and now you can use videos animation it's all about html 5 and explosion of devices responsive design and you still need to find innovative ways to work around the many constraints the web still has right even project management is evolving very fast the way we worked some years ago is very different from the way we we are working nowadays right and if you are still doing web project the same way as before which is what is you know explain on the screen you are in trouble and your customers are in troubles as well so if you don't want to constantly challenge yourself if you are not willing to reinvent your job on a regular basis yeah then look for another job the web is definitely not for you so being a web developer must not be your dead job but your passion don't kill me here is a tweet from a couple of days ago during dupalcon this is yeah kind of embarrassing really but i don't want to blame you right but not using a version control system when developing a website nowadays well this is a big no no right it was not the case 10 years ago but nowadays there is no question about it you must use a version control system for all your projects and the good news is that we have awesome tools now the fact that many dupal developers do not use version control system yet not yet is just another proof that keeping up with all the changes is really difficult this is true for best practices but also for the basics right so time for a commercial now i cannot speak at a conference without mentioning htp because the web you know would be nothing without the beauty and the power of the htp protocol so i have the same question at every single session i do how many of you have already read the htp specification okay so see not that many i know you are not all developers but you know everything you do with drupal is powered by the htp protocol and with drupal 8 htp will become even more important for drupal developers so if you are a developer and if you have not read the htp specification yet it's about time there is a lot of interesting stuff to learn here and instead of reading the original specification this is the first link read the htp's document instead this is a right of the original specification so it's not any version of the htp specification this is still htp 1.1 but this document clarifies the the htp specification and the organization is also much better so you can read just one chapter tonight and another one tomorrow and be done by the end of the week i mean it really you you should do and i think that even you know project managers should read the htp specification at least very fast but they will they will they will understand a lot of things by reading the specification and if you are not a developer and if you you know if you don't really understand how a web developer think work um you i recommend you this book um hackers and painters um it it's really a great book and if you are you are a developer you can definitely read it also so learning it running the htp specification keeping up to date with everything takes a lot of time and you probably don't have much time at work right for such activities so this should mostly be done on your spare time right so the web is complex the web evolves at a very fast pace so keep learning to become a good developer you need to learn a lot of things upfront that's for sure but then you need to keep learning new things to stay up to date you need to learn about you know the new best practices the new standards the new software the new technologies but learning is not enough you need to gain experience and nothing can replace experience um let me tell you another story this is a sad story uh really and um it took place during august 2007 in turkey emin a 20 years old woman and uh ramison a 24 years old man were married but they decided to split up and it happens quite frequently in such a situation they kept having arguments about a cell phone you know sending text messages um it to each other right and that's a typical real life situation but at some point ramison sent this text message to his xy it means anyhow whenever you can't answer an argument you change the subject nothing special in the message but notice that there is a mix between the i letter we all know about with a dot on top of it but also some i letters without the dot but as ramison's cell phone could not reproduce the i letter without the dot right he sent this message instead the problem is that even if you know the message is quite the same the dots added on top of the two i letters change the meaning quite tragically night means and you won offensive language of it anyhow whenever they are fucking you you change the subject and i don't have to explain why emin emin was shocked when to receive such a message right but why in the first place ramison did not anticipate this issue because for the meaning to be different you also need to replace the last letter of the word from a to e right so knowing that the vast majority of the cell phones in tokyi were not able to deal with the dot less i and because it didn't change the ending of the word he thought that the message was safe right but emin read the message quickly and she did not realize that she actually missed and predicted the meaning so i said it was a sad story and here is why shocked by the message emin showed it to her father and the father angrily called ramison and he accused him of calling his daughter a prostitute so ramison went to his wife's arm to apologize and to explain the situation but he was attacked by his wife her father and two sisters he was stabbed in the chest but he succeeded in grabbing a knife stabbing his wife and getting away the father and the sisters were arrested and put in prison emin died of pleasing and ramison killed himself in prison emin that day the lack of a single dot of her letter caused by a tiny technological constraint caused a chain of events that ended with very tragic consequences and if you are thinking well it's only about cell phones in tokyi so i'm not concerned at all you're wrong you're totally wrong and as a matter of fact if you have already worked on international websites you know that localization is difficult time zones parsing and displaying dates parsing and displaying numbers displaying currencies etc that's a lot to take care of but that's the easy part as you know if you don't get it right it is easy to spot an issue and to fix them and actually lay this version of php gives you all the tools you need to get it right but the dot less i letter is slightly different and kind of unique and again if you have already worked with on international website with some users in tokyi you it the issue at some point it was probably at nightmare to identify the problem why because you know some random users you think that it is about random users they reported the website does not work at all for them right it works for you it was for everybody but some you know if you use or it seems to not work for them then you have a look at the error logs and you are not able to understand how is it even possible to have such random errors it looks like they don't have the same code executed it how is it even possible right you have just experienced the turkey issue this is such a tricky issue that someone created a logo that you can use when your software passes passes what it calls the turkey test so what is it about this is because in turkish they really have two different i letters one with a dot and one without a dot right two different letters so let's see php itself this is the turkey test so let's say we have a user the user is able to choose his local and choose his turkish so this is the very first line here on the screen and by the way if you don't understand the code no big deal you will definitely be able to understand the consequences of the code and if you are a developer you can try this script at home and then we have two lines and it's very easy we have you know two string we want the lowercase version of the first one and the uppercase version of the second one right and this is the output it's totally messed up right doesn't make any sense how is it even possible and if you think that this is just you know a small annoying display issue again you're wrong try this now so this is the same script we have the turkish local we create a new class test it and then we create a new instance of the class nothing fancy and now if you are not aware of the problem with turkish if you have not identified that the error only occurs when the user selects the turkish local you're lost why would a class not be found only randomly that's because of the problem I've just explained right by the way the bug was reported for PHP in 2002 and PHP is not the only software to have this issue and the good news is that a fix was actually merged about three months ago no comments on the fix itself so how many of you were aware of the turkish issue one two three four four people right okay for the others well you have learned something new today good so that's part of your experience right the web is still very young it evolves very fast but everything is not perfect yet you must learn you know as many as you know many specificities of the web and that's why I said you should learn something new every single day because there are a lot of them to learn really so actually next time you have a weird bug with you know like a class that does not exist only for some people you will remember this talk and if that ever happens please send me a tweet so but this story also tells us something else as people working for the web web developers web designers or any other related job web related job we have great responsibilities right we are in charge of software that are used by millions of people they are using our software to do their job to do business to help people so try to not screw that up right you need to get it right keep developing websites gain experience that that that's important but there is something else you need to actually be a good web developer this is the curiosity you have to be curious to learn about you know new practice best practices new standards new software new technologies and you need to look around don't limit yourself to the community you know have a look at other languages have a look at other technologies as a matter of fact symphony is full example where we borrowed some ideas from other frameworks written in many different languages I'm sure this is exactly the same for Drupal so for instance in 2005 I started to use gml in symphony for configuration files and because you know I used it a lot when I was doing Perl and we are still using yaml for configuration file and now Drupal 8 is also going to use yaml for configuration file and Dris did a small demonstration of that during his keynote but sometimes symphony borrowed ideas from technologies I've never ever used myself and most of the times these things happen during conferences I'm speaking at many conferences around the world but when attending a conference I don't like drinking beers that much I know this is probably not good to say that during conference happening in Munich but yeah that's the truth um but I definitely love bookstores so whenever I go go to a conference I need to visit a local bookstore even if if I don't you know speak the local language I buy many books mostly technical ones I love books sometimes I read them sometimes I don't the one in Japanese for instance it doesn't matter I need to buy books and so four years ago I was attending the mass equal conference in the US and as always I was I was looking for a good book to read I stumbled upon this book about spring spring is a Java framework so I've never learned Java I've never written a single line of Java but the book looked interesting and I was curious about how spring solved web problems by the way Greg Walsh is a great author and he explained things in a very easy way so after reading the book I grasped dependence injection and why you wouldn't need a dependence injection container if you don't understand what a dependence injection container doesn't matter and at that time I was working on yet another symphony to prototype I was pretty happy with everything but you know I was this something that annoyed me a lot how to manage dependencies within the code so I read this book and suddenly you know everything became clear in my mind what I needed was a dependence injection container so I read the book in one fell swoop and two hours later I started to code my very first dependence injection container prototype I started to dig the Java code I got inspiration from the Java code and a few days later it was ready a full feature dependency injection container written in PHP based on the spring ideas of course the code was much different from Java but the concepts were similar and the names too so instead of trying to reinvent the wheel I based my solution on a proven one one that has been popular for so many years in another language of course the concept has been adapted to the PHP world but the solution for the problem I add you know it's quite similar and since then I've tried to evangelize my new knowledge and I talked about a dependency injection during in many conferences and as a matter of fact nobody's almost all major PHP frameworks are looking to using a dependency injection container for their next version and Drupal 8 is no exception yes there is some Java framework philosophy embedded into Drupal 8 that's scary yeah I know so this is my advice drink less beers read more code read more books so you see be curious benchmark have a look around right also because you know people do not realize that developing website is still a challenge there are so many things that can go wrong we still have problems with you know compatibility between browsers we can have asking issues scalability multi devices support performance stability bugs everywhere requirements changing all the time so many things are not ready yet for prime time right so we do do call our industry you know computer science but in reality we are still craftsmen our websites are still and made craftsmen who are changing the world changing all the other industries one at a time but we have not built our own industry yet we are craftsmen but we should also be artists I think because you also learn a lot by experimenting trying new things stupid things and I like 10 challenges I like you know to push limits it helps me learn new concepts and it started very early in 1990 1990 a program of mine was published in a french magazine it was a challenge and an interesting experiment for me it was about coding a full game in less than 10 lines of code right and at that time you had a limit for each line of code this is the first line well frankly I have no idea you know what it does I've tried to you know it doesn't doesn't make any sense anymore but this was my first published code ever and probably my first free piece of software very proud of that and from time to time I still do you know some experiments some years ago I did some experiment with Twitter I wanted to see if it was possible to embed a fully working program in a tweet written in PHP which is you know really a challenge because PHP is really verbose so my first successful attempt was a framework that fits in a tweet so this is a framework an MVC framework not really now we don't have the view actually um yeah PHP is the view so we have an MVC framework here and later on I also published published a dependency injection container that fits in a tweet so if you don't know what a dependency injection container is this is it it was not really serious you know but I wanted to prove that it was at least possible to do something like that I also wanted to prove that you know the big names we have for design patterns all the names we give to some concepts like you know frameworks dependency injection container are actually much simpler than what most of us think and it also helps to make a difference between a concept and an implementation oh I like this one I'm not the only one to have fun with code some time ago someone opened an issue on the twitter bootstrap project on github he had a problem when using jjs mean on the bootstrap code you know to minify the the code yeah bootstrap is is written in javascript and it was not working so apparently the developers of bootstrap do not like the semicolons right so for aesthetic preferences I think so they don't use them right so you have two lines of code there is no semicolon at the end and this is totally valid in javascript but sometimes you need to put a semicolon to avoid ambiguities and so the pub was closed pretty fast but duglas crocford started a flame war in the commands for this issue when he said that is insanely stupid code learn to use semicolons properly and then many people started to give their opinions and think got out of control pretty fast as you can see more than two android commands on the single issue it was closed right away but the interesting part is that someone found a discussion about the semicolon quite funny and he created a new language where the only valid characters are semicolons and spaces if you don't understand the code this is a way to print hello world actually it works so be curious try new things explore new worlds have fun don't stay in your comfort zone I would even say do reinvent the wheel just to understand how things work do create your own cms do create your own framework but please be pragmatic don't use them for commercial work I mean most of the time yeah you know most of the time the things you are you create are not robust enough even if they're extremely valuable from a learning experience so sometimes using you know using custom code to solve a problem is is easier right you have something to solve and you you just write some code javascript php whatever just works and it's probably easier than learning existing libraries and frameworks and cmsys but it's always a great learning experience and much better to actually learn how things are done by authors oh remember this how many of you have already used nescape 2.0 wow you are old okay so so working for the web is difficult but at the same time we are very lucky because we understand how the web works right so yeah you are old enough so you so you know you you grew with the web so most of us followed all the incremental changes you know on the web and the web you know some years ago it was just about html static pages and that was all uh now we have more complex ones so if i i start to talk about pop smtprc jabber whatever you are going to understand what i'm talking about it was it is probably not the case for the older i mean our parents and it is probably not the case anymore for the younger you know at least the barrier of entry is gigantic for them right i think this is a problem there is a disconnect between people who know us and the one who don't know and you know most of you probably think that the younger people are feeling comfortable when browsing the web i'm not so sure many people just do not make any difference between the internet the web a browser an address bar google or facebook right uh if you don't believe me let me tell you a story you've you've probably heard about this one uh in early 2010 uh read by web published an article on facebook and the title was facebook wants to be your one true login uh the article itself was uh about a deal on aol and facebook and but that's not the interesting part less than a half an hour and after the publication the number of visitors on these articles started to grow significantly and after just an hour the article reached number of visitors an average article might see in an entirety so something strange was happening and the comments on the article itself looked really weird and totally disconnected from the contents of the article a deal between aol and facebook why won't you let me sign in all i wanted to do was log into my facebook account i don't like this new way i need your facebook this one is very bad and hundreds of similar comments what was going on if you want to log in on facebook you probably open a browser you type facebook.com into address bar right easy enough or you created a bookmark for it so that it is easy to access but apparently many people do not do this instead they go to google they type facebook login in the search box and then they blindly click on the first result but that day google thought that the read write web article was the most relevant page for the login facebook keywords and so it was first in the result page so people are using a search tool google as a navigation tool as a bookmarking tool sounds scary yes yes it is so at some point a website had to add this small text to explain the situation to visitors this side is not facebook this is a website called read write web that reports on news about facebook right to access facebook right now click here for future reference type facebook.com into your browser address bar we recommend that you then save facebook as a bookmark in your browser but unfortunately to understand that text you need to know what a browser is what an address bar is and what a bookmark is so people did not figured out that it was a blog post about facebook not facebook itself well even if you have a quick look at the page looks pretty obvious now the logo the colors it cannot be facebook so people get stuck pretty easily and as web developers we have huge responsibilities we make the world work or not we have the power to make things easy are complicated i'm talking about web developers but i think this is really about all the people working on the web for the web you know the web designers responsible for designing user interfaces even project manager i think so you see don't believe me that this is a large number of people you you're probably thinking yeah this is just a small proportion of the population it cannot be true um here is a video recorded by google in 2009 hey this is scott from google we're here in time square new york to find out what is a browser a website that you can search shaman i think i call it the search engine that's what i call it the browser what is a browser and browser's search engine i say search engine browse what it's where i search through like to find things it's where you put your search terms correct what is a browser google what else browser is what you use to look at internet web pages what is a browser i use the yahu who is that not a browser do you know what the differences between a search engine and a browser well it's not exactly i mean no i don't know i guess the internet is just where you you know find anything and i guess you browse the same way hell i don't know a browser is when you know what you're looking for and a search engine is when you're searching for something i assume a browser's way to get on but uh i don't know much so do you know what the difference is between google and your browser um no not really what browser do you i use uh firefox what made you switch a firefox my friend came over to my house and erased all my other browsers and installed this man what browser do you guys use i have a aol we go through um uh broadband the big e is what they explore out there i'm not a computer guy i might be the wrong one for this what browser do you guys like to use we use google i use google i google for dominates the market obviously but uh in case you like to go to yahu just to give you some business yeah i use the internet explorer and most love firefox oh uh is that your internet browser uh help have you heard of google's browser chrome no i haven't not c h r o m e what is that crown no i have not have you heard of google's chrome browser no should i use it have you heard of google's chrome browser chrome browser uh uh no way less than eight percent of people who were interviewed in this day knew what a browser was eight percent of the people a recent analysis of 1.3 billion web pages revealed that more than 20 percent of them contain facebook links right so google used to be the browser for most people now facebook is becoming the browser is the people's viewport to the web so next time you go on for holidays if you think that your mom is still bad at computers help her teach her something new every single day what is a span what is the difference between internet and the web between facebook and the browser why she must not give their password after clicking on a link in an email or why she won't get nine million dollars from someone she does not know in africa so working for the web is not a day job it is a passion it is a challenge it is exciting but there's another outcome it opens up huge opportunities as everything is in the process of being reinvented thanks to the web 30 years ago the internet was just a network um for experts today more than two billion people are connected to the internet right and according to a report from uh mackinsey global institute the internet accounted for more than 20 percent of the gdp growth in mature economies about uh in the past in the past five years right more interesting mackinsey found that there is direct connection between the maturity of the internet ecosystem and the rising of living standards right over the past 15 years and thanks to the internet the gp per individual increased by 500 dollars in advanced countries and it took 50 years for the industrial revolution to achieve the same results as you can imagine this is particularly relevant for developing economies this demonstrates the positive impact of the internet and the speed at which it um delivers them and that's because everything around us is turning into a computer your phone is a computer your camera your television your car your fridge you name it and mostly everything you do now involves a computer reading a newspaper reading a book booking a utter room playing games buying foods listening to music and all those things you can do on a computer as mostly possible thanks to the internet internet is probably the biggest revolution ever right and so the internet the internet is changing the world one industry at a time but i believe that most innovations on the internet are not driven by big corporation like google apple microsoft whatever i believe that the major changes of our world are initiated by people who are passionate enough to do big things and most of the time there are people like you people who understand the web and the internet is a great enabler really it is still possible for one person to change the world or at least to be you know part of major changes i won't talk about you know wikipedia or one laptop for chat and all the great initiative we have thanks to the internet and today i just want you to you know to make you realize that you can be part of these radical changes if you think that something should be changed if you're you know if you like a specific existing initiative please try to contribute you you are already contributing to to dripple and dripple itself is a contribution to these changes but if you think about it a bit more you realize that this revolution is heavily based on open source software a lot of what i've been done in the last year is powered by open source software so as an individual but also as a community you are in the best position to make the world a better place and of course this is just the beginning a lot of innovation are you know out of us the internet is still in its early days so the internet is changing the way we work the way we socialize create and share information and yet we are still in the early days of this great revolution being a good developer is a lot of artwork it comes with huge responsibilities but it also puts you in a best position to benefit from the big opportunities the internet creates and when i say benefit i'm not talking about you know getting rich even that might be a nice side effect i'm talking about making the world a better place at your own scale thank you


norepinephrine is a potent alpha agonist with beta agonist properties that can be used to treat spinal anesthesia-induced hypotension without causing a decrease in cardiac output or heart rate. This study found that norepinephrine was more effective than phenylephrine at maintaining normalized cardiac output and stroke volume, while still being safe for use in pregnant women. This article was authored by Wu Jin-chou, Sun Yan-chou and A. Eryung Lee.


Welcome back guys to the 21 convention. Before our next speaker was a teaching pick-up with Neil Strauss himself for a couple years He was actually training law enforcement and military personnel how to kill without further ado. Here's Bravo the man himself Thank you for that awesome introduction, which I help right All right Before I got into pick-up. I was actually a full-time firearms instructor. I'm a CCW instructor I have three NRA certifications. I'm a taser instructor edge weapon instructor low light I went around and helped teach various military and law enforcement SWAT teams special forces group hostage rescue room clearing all that kind of fun stuff Did this just go out or is it still on? Okay So When I actually I got divorced too, and that's how I got into this whole pick-up stuff But beforehand this is what I did and we're talking about doing a cool like self-defense Awareness and also how to pick your first firearm So I was really trying to put all that together in this presentation If you guys have questions when I'm going through this stuff I'm gonna try to have a large Q&A section at the end. So write them down Don't so you don't forget them. I'm happy to answer as much as I can First off who here has ever fired a gun in their life before raise your hand awesome I'm from Arizona, which is a pretty pro-gun place. So that's pretty cool How many people here have ever studied martial arts before raise your hand? All right, hopefully I don't make any of you mad when I rip on some of the bad ones Anyways when I first got into Tactical training this is something I always thought was if you cannot protect yourself for your loved ones You're not a man And you guys all heard about that court case a little bit ago where the two drug dealers like kidnapped the wife went to the bank Pulled out all this money went did math came back raped the wife raped the kids set the house on fire the husband got out and Then he lived everyone else died that whole court case just recently happened one of the senators houses just got Broke it into like two three days ago And it was the grandson that came out with a shotgun and like actually protected him with a gun So that was always one of my things was if I can't protect myself I can't protect the people I care about I just didn't feel complete So I took this on my own to figure out how to defend myself how to defend my loved ones And if you guys want to do that too, if you especially would do in a firearm The I get asked this all the time What should you go to a range and actually pay someone to teach you how to do it? Just like I got a motorcycle a little bit ago I didn't just go down to the dealership hop on it and ride home I went to the riding class learn how to do it responsibly so that way I don't kill myself or kill someone else This thing blew me away when I learned this the police have no duty to protect you. It's a little hard to see but that's a really overweight police officer eating a turkey leg and I have no confidence that someone like that is gonna come to my rescue and help me and Most of us have seen officers where they're pretty overweight and out of shape And you think they're gonna be there and help you out my brother's actually a cop my ex-father-in-law is a cop I've trained more than I can count my brother's also a lawyer and a firefighter. That's what I had to compete with growing up But this blew me away when I learned this because we're all we're all brought up to think that when you call 9-1-1 The cops are gonna come there and help you well That's if they get there they might be dealing with something down the street And my brother would tell me that he would get a call and would take 20 30 minutes before you get to the house So the whole time he's thinking like hopefully they can make it until then so when we're teaching the CCW classes we get into this kind of stuff and What I would recommend is you guys when you get home all Google this phrase The police have no duty to protect and just read all the shit that comes up But these are the two big ones and this is actually from the ACLU website, which I don't like the ACLU Just to show you how that other people besides crazy gun guys think about this Jessica Gonzales versus the USA and I'll just read it to you guys real quick June 1999 Jessica Gonzales's three daughters age 7 9 and 10 were abducted by her estranged husband and killed after the Colorado police refused to enforce restraining order against them Although Gonzales repeatedly called the police telling them of her fears for daughter safety.  I have an order against them by the time the cops show up They're already gone Nothing they can do So the cops can only enforce the laws. They see them being broken now. Some of you guys might be thinking too Well, I don't have restraining orders. I don't have to worry about that What about someone else?  That's Extra fucked Warren and Tala Fino heard Douglas's screams from the floor below and they called the police They ended up going outside like the balcony. There's like this adjoining roof They waited outside and actually watched a police car do a slow drive-by past the back of the house The cops never even got out.  It was never even dispatched a Little while later after the screaming stopped they thought the police were there They called down which ended up alerting Kent of their presence for the next 14 hours They were raped robbed beaten and forced to commit sexual acts upon one another and the four-year-old daughter was there After this all happened they left they ended up recovering calling for help Sue the police department the court held that the police are not liable for failure to provide adequate police protection So it sucks, but you're on your own you got to learn how to defend yourself You got to learn how to take care of yourself and then afterwards What I always recommend is then calling the police and letting them know hey I just use my gun or whatever and then deal with it That's at least my thought because I've trained a lot of cops and I don't feel safe around a lot of them So how can we defend ourselves? So the first step is to actually be aware and they have the different levels of awareness The first one is white Unaware and oblivious to your surroundings and I'm gonna give you guys the first analogy for this I want you guys to help me out with another one, but white people who are in the level of awareness.  I had a couple Snickers Okay, I've never done that. That's I can't even understand how people do that But it's also like maybe you're just not paying attention for a minute. You miss your exit So that makes a little bit more sense to him. So If you're just zoning out for a minute, that's white But really white is like when you're asleep and you're totally not aware what's going on and another good example would be The girl who's jogging with her iPod on at night down the street like anyone can come up behind her and grab her She has no way of even know what's going on But let's stick with the car analogy So yellow is aware of your surroundings and you're alert to new information So does anyone have an example of like a yellow state of awareness if you're driving your car? Perfect driving down the street.   They just freeze and slam into a full force which you guys have seen car accidents before it happens a lot So for being aware of your surroundings the the example for this would be white. We're out at the bar We're never in white yellow.  Maybe they're making a ruckus making a lot of noise acting dumb Stuff starts throwing around now.


All right, thanks for staying with us now. Ending poverty remains a major global challenge. Every year on October 17th, the world marks the International Day for Eradication of Poverty, also known as End Poverty Day. This year, the theme puts a spotlight on decent work and social protection, putting dignity in practice for all. I think it's a very, very, very, very, very important day. If you check the diverse problems that we have and the vices that you see right now in today's economy, it can be largely tied to poverty. And you see this decent pay, what do they call this word now? Dignity in labor. All of those things are part of what can truly eradicate poverty, especially here in Nigeria. If we start to standardize certain kinds of professions, we would find something. Because in everything, every skill you have, somebody needs it. So it is just putting that dignity in that person's labor and giving decent pay. I was watching the podcast, the honest bunch, the one they featured, the comedian. I've never seen him. So I know his face. I've never known his name. The comedian they call him, what's his name? I'll look for his name. He was saying something around that he would charge some clients sometimes, that this is what I charge it. That one day, one of the clients, he charged the client, I think $3 million, the client gave back and said to him that I'll pay you $5 million. It's like even you said, if you don't know your word, it's very rare to find those people.  It's a different thing if I say, see, I know what your word, but this is what I cannot say. It's a different thing. But you know that this person is worth this thing and you know you cannot afford it. And yet you choose not to pay the person. That one is a different bargain entirely. Yeah, it comes back to the dignity. Absolutely. Of course, if you see certain things as beneath, you think it is a certain kind of people that do that skill or that have that skill. You tend to want to say, oh, I really don't think I should pay you much more than, yeah, very true. It's called the stalker, the comedian, I think. I love the guy is so deep, I didn't know. I was just going in my office like this that I was watching. The point of I've never heard of him on TV when I worked with him. That podcast, right? No, that podcast is one of the, I think I would recommend it to everyone. Yeah, I think you would recommend it. It's an angel guy from South South. I think it would, yeah. I mean, the kinds of words of wisdom that came out of that guy's mouth, oh my God, he had, he said so many things, so many principles of wealth, the principle of given, the principles of, you know, that you look at. Yeah, you know, sometimes it's not everything about money. He said so many times that he had done things for free. It came back in a very big way. I mean, the people should go on what, I recommend that particular episode. And the one with D1 was quite interesting. I watched it last night. There was so much wisdom in it. You know, it resonated with me because. Dio, Dio, Dio. Dio now. Adena, yeah. Adena, yes. The Kenny's idea. Kenny, oh. We need to work that one out. What do you do with us? Yeah. I don't know, but it's old now. No, because even with Dio's own, it resonated with me so much because sometimes I find myself like, I'm working 24 hours, so I don't understand. It's because I love what I do. You know, it's not all the time that it's just about money, money, money. He slept for seven years. But when he started paying off, he was just going to camp like the father loved. He also was paying. He talked, he has to. All right, so quickly, what did we find in today's news? I was spoke first in session, I don't have news for us. So let me start with you, Dami. Okay. So, my, what I found in the news is this story that I've been going around about people's genitalia missing. Disappear. I mean, is there when somebody just touched you, maybe your penny, so if Adena would just disappear, I don't see any sense in that, but I mean, thankfully, I think a medical person had come to explain to us that it's actually, it could be chorosyndrome. So there's actually a medical condition called chorosyndrome.  Maybe they're going through, maybe midlife crisis, you know, they are sort of, they're like, okay. No, but for real, that was what I found in the news. You know, so it could be, you know, I think Nigerians, everything that happens, we just think he's super, okay, so the people that are confessing, what are they confessing to? Well, this person only said it could be, but I don't think that I believe that if you touch somebody, the person's private parts will just disappear. I believe. That is quite extreme. I believe. I believe. I think I've told you. How can it happen? I mean, this is not a today's issue. This happened many, many years ago. You also understand the principle behind that thing. It begins, it's just fetish. It's just fetish. It's the same way. What are we doing now? What are we doing now? So is it all about that backlash? No, for real, does this thing actually happen? Are we being serious? It happens. Because I believe that the medical court is going as well. The person will be pressed and not be able to eat. No, so apparently, so when I was much younger, I know that these things happen and then people would gather on the streets and then you're wondering what's happening. And then you will see this man screaming.  Screaming and saying, please, where is my... I felt someone touching me. Where is my... So again... What do you mean I see? That you're going to take them to room number one. I understand that. So people actually use it for rituals. I get that. But are you saying that all of... I think now they've recorded over 60 something people that have missing genitalias. Are you saying that so all of these people, they use their genitals for ritual? No, but it must mean that this is a new kind of fetish interval. No, genitalias would actually shrink with... It could be a medical condition. They should have gone quite front. No, why are they looking at that? Because there is the medical... We're not talking the medical... There is the medical side of it. And they introduce it. They introduce it. So in Abuja now, did you not see...  I don't know, there was a video around this. Charms? Yeah, charms on their neck To prevent people from taking their drugs. I saw it on Twitter this morning.  Isn't that why he's here? They are like, what kind of wallah is this? Oh, God. But this is Nigeria. You can't discard it. It's very difficult. Am I okay? Don't touch me. All right. Today, Tewa Savage has signed in a note. She says to my dear Savage soldiers have been fighting off of virus for the past few weeks and was today firmly instructed to be on strict book hours for the next few months. I will unfortunately have to postpone all performances, including my first ever headline arena show in London. I'm had broken and devastated, but I have to do this to save what's left of my voice. I'm so sorry. I love you all and I promise to be back performing once and fully here. Yeah. Sending her lots of love. Sending her lots of love. Sending her lots of love. Sending her lots of love. She's been on tour for a while. Yeah, for a while. She has so much energy on stage. She does. She does. She's a performer. She is. And she has. And Yemiya Ladi and that Nimiya Ladi. And Nimiya, Nimiya Ladi. Nimiya Ladi. She doesn't go. Nimiya Ladi. She doesn't go. Nimiya Ladi. Nimiya Ladi. She's a showstopper. Love it. She will not be twisting. There's a way she twists a lot. Yeah, then. Yeah, that's her. To a kid up. That's all is a special kind of. But Tewa has been busy. I really pray for her. Because this thing, when it starts to affect their vocal cord, there's really nothing you can do. Some of them have to even go through surgeries. Yeah. So we pray for you. Sending lots of love. Let me come back to Nigeria. Our almighty Third Milan Bridge. Third Milan Bridge now a death trap. That's what motorists are lamenting. This is their raising concerns over what they describe as a deplorable state of Third Milan Bridge. And they have called on the government to immediately fix the bridge, which is the longest amongst the three bridges that connect Lagos Island with the mainland. They are about 11.8 kilometer bridge starts from the old Shurki end of the mainland and ends at the Adelie interchange on Lagos Island. So honestly, when you're driving on Third Milan Bridge, you have to be extremely careful. They're really bad potholes. And you see, what really irks me is, this is the same bridge, my dear, that I'm big uncle. But as me, no one had me to call you out. I mean, first you have to shut down that bridge for a very long time. For a very long time. So it is actually, and you know what they were saying? Okay, the then minister, he only worked on the joints. But it doesn't make sense to me that you shut down a bridge and you know that there's a pothole somewhere and you're just working on the joints. Would you not see that that pothole needs to be resurfaced or whatever it is? There's several videos that we've never seen. It's never been this bad. It's really bad now. Third Milan is really bad. If they scare it away.  They are extremely deep. It's almost like you want to see the water. Yes.  It's almost like you want to see the water. Well, I invite you to come and see the water. Wait, that would be me. No, it wouldn't be me. It wouldn't be me. So please, we are calling on the government. So please, we are begging. We are begging, please. Because they are for our lives. This place now, there are so many things. At least, Third Milan is even better. Like going to the mainland is even better. There are three routes to the mainland, I mean. Unlike, this is our lekeheke, there is just one road. So what I'm saying is that here we can manage a lot of things but Third Milan is a very heavily used bridge that we cannot afford to have the kind of portholes that we see on that road.  Billions go into this project. So sometimes I think that is it not penny-wise pumping? Like literally, if this was my business, would I not just find a permanent solution? Like, you don't see people doing it all the time. In other developed countries, they just do it, permit it, they don't move. Before they come back to that road, to take centuries, because why? The mixture, because there's a certain mixture that would stand the test of time. So how we keep repeating the same thing is what I cannot understand. At the same time, I think bitumen, which is that black wood, would always require maintenance. So if we don't keep maintaining it, the only one that would not require much maintenance is when you use the concrete. Oh, concrete, yeah. Like the one that has salt mixture. It's the mixture of granites. It's not just bitumen alone. Yes, but then if you don't maintain it, it will stop going on. There are still roads like that in other parts of the climate. It is the concentration. Genest and so it might be that they would put more of the granite and more of the concrete. Genest and less of this. There is a specification that these roads can last for years without having to come back to touch it. It is an idea that we keep fixing the same roads in this country that just disturbs me. It is the idea that I need to do something for my people if I'm in a position of government. It's as simple as that. We take a break, Biko. Let's discuss demolition of houses. Our spokespersons say it's impossible. Stay with us.


This is for the exterior speakers. I'm not sure if I mentioned I have exterior speakers I got wakeboard tower speakers, so you got to run that through with the drill and Yes, it would have been easier to do before spray foam, but since I've never done this before Well, I'm doing it after spray foam. It's gonna be perfectly fine. So just drilling a hole here that will be for speakers and 12 volt and And Yeah, we'll put this all together and continuing on we've got the Speakers wired We've got the yes exterior speakers. Thank you Steve exterior 12 volt lights same ones over here and have Two on each side and then two speakers on the passenger side So that's gonna be kind of cool. Probably some kind of switch to turn them on and off in In the driver area We got mojo bus over here finishing up some of the cabinets. We just shared a burrito together. It was a fantastic Muibien moment So without further ado Let's get the ceiling up. Here is the ceiling Steve whoops, what did you do here? Jack's tried to put into that piece of metal Yeah, I tried to pull it down and didn't realize That on the other back side it was bent. Yeah, and it hooked through when I was trying to pull it Yep, the oopsie the roof is falling the roof is falling Anyways, we got to back up a little bit do some more work, but hey, look at how great. It's turned it out We got the max fan wire that goes down there Well, these other wires you saw that look at the front parts coming together. We will cover up them screw holes But we should have this done by today That's right if Steve doesn't rip any more boards out Where we started a several hours ago, but you know what as a Uncle Dan would say Happens right name one thing that The yes s doesn't happen Sure happens here in the school bus when you're building it. That's for sure. Well, look at that Doesn't look good.  We covered our mistake. We made it right now. We're moving along Life is great. It just took us a little while We probably would have been done with this side and then some already, but it's all right. No worries life goes on with our delay Things of course that we learned not to do on this one This is how far we got so tomorrow. We'll finish this thing out I think also we'll get the cabinets in didn't get a little frustrated with one of these pieces man They're just like if you ask me if I would ever use cedar again. Hell, no never use cedar again Look at how thin this stuff is. It's very brittle It on a curve. It's very difficult to use. I wanted extra headroom as you can see I have some good headroom, right? I have a couple inch couple inch gap So I do like to let I do like the look of cedar, but it is very very hard to work with so Next bus. No Absolutely not even if you pay me.  So just want to say thanks to everybody who's helping me out I really appreciate it Definitely is more fun to work on projects with people And especially more knowledgeable people because there's a lot that I still don't know. Hey Steve It's today the day What? Yes, today's the day that we finished the ceiling everybody. Oh, yeah, that's right. I forgot it We're gonna finish this here today. So Hopefully hopefully Cross your fingers. We don't screw up again because we only have four four and a half packages and each one is like Shoot I forget 17 20 square feet So we got all this Outside we got the mojo bus working hard. What's going on guys? You guys doing coat number two Ah gotcha, okay sweet so We're just working way there has been a delay in the videos It's because sometimes I'm working till like 10 o'clock more of a morning editor and these guys like to show up nice and early in I feel bad for sitting around so That's why the videos have been a little kind of sporadic since I've been back in the States There is no Wi-Fi issue no connectivity problem. Just Yeah, just Working hard And I do want to thank again all of the people supporting me on patreon Being a small creator. We are the most vulnerable people on YouTube to especially if you're full-time vulnerable to Little ups and downs and little changes and things like that. So if you can spare a cup of coffee per month I really appreciate it helps me out and continues Helps me basically stand the road and keep continuing with the videos Good news we didn't screw up like we did yesterday yet Knocked on cedar planking Also, Steve told me ship lap it folds over on top instead of in through the other one And if you at home are thinking about a school bus conversion, I would highly consider not cedar tongue and groove It's too brittle. It's too thin.  I would suggest ship lap Which is what the woman was building her band next to us That's what she put on her ceiling. Yeah Yeah, and I know someone out there is gonna be like well, it's too wide and the cedars narrow Yes, you're a hundred percent right, but this has been one of the most Aggravating I don't really get frustrated, but thanks. This thing is pretty aggravating for me He gets so aggravated we had it have Chinese again last night One more recommendation if you guys at home are building the bus van I would put two nailers one on each side of the metal thing. That's what I'm gonna do next time Just gives you a little bit more room for error Update almost got a ceiling. How exciting is that? Man, I have wanted a wood ceiling since Over two years ago when I well when I first started Looking into the van life and considering a van and then I stumbled upon school buses It really is how much cheaper they are Not necessarily with gas mileage, but just a purchase I always wanted a wood ceiling and I finally have one and now we're almost done So this makes me super super happy Of course, we got a little bit of foam to play with up here. That's where the air horn thing is Doesn't look as flush as it should have been so I have to dig that out. It's all right. I Can play with that tomorrow. But look things looking good Very very good. This is where the bedroom lights will be I chose to put them further down towards the Window side so that way if I ever decided to read a book Like my aunt's new book. I'll let you know what the title of that is Yeah, I can I can like read in bed and then from when you're looking at the hallway and it stops You'll just see an illuminated area back here. You won't even see the lights. So it's exciting that center lights Bench lights front light Max fan double skylights Man, this thing is gonna come together in the blink of an eye. Well, oh 30 40 days


Okay, we're now going to work an example problem involving radiation. So what I'll do is I will begin by writing out the problem statement. This is a very simplified radiation example. We're going to use the equation that we derived at the end of the last segment where we consider the object to be a gray surface. Okay, so what we have, we have an astronaut sitting and working in the service bay of a spacecraft. And we're told that the astronaut is surrounded by walls at a minus 100 degrees Celsius. And area of the space suit of the astronaut is three square meters, emissivity is 0.05. And we're asked to calculate her rate of heat loss when the suit's outer temperature is zero degrees C. So she would obviously be at a warmer temperature and then there's conduction going through the suit. But the outer temperature of the suit is at zero degrees Celsius. And we're trying to calculate the amount of heat loss from the space suit. So let's write out what we know and what we're trying to find and then we'll work this problem. Okay, so we're trying to find the heat transfer from the astronaut. We're going to call that Q and it will be watts that we'll calculate because we know the area of the astronaut's space suit. So let's begin with a schematic of what is going on in this problem. Okay, so there we have the astronaut in her space suit out in space. We have vacuum conditions, so there is no mechanism of convection going on. The only form of heat transfer is going to be radiative heat transfer. And given that the astronaut's outer suit temperature is at a higher temperature than the surroundings, we know that the heat transfer, the radiative heat transfer is going to be going in that direction. So let's make a few assumptions in order to solve this problem. Steady state, so the spacecraft is not going around the earth and going from a shaded region to a region where we have solar radiation, it's operating in steady state. Second thing is we will assume this to be a gray body and with that we can then say that the absorptivity is equal to the emissivity epsilon, alpha is equal to epsilon. And so with that for analysis what we can do is we can use the equation that we came up with in the last segment. So let's begin by writing out that equation. Okay, so we have this equation, we can put in all the values. Now the one thing you got to be really careful with, I've already told you about this, is watch the temperatures whenever you have radiation because notice we have this raised to the power of four and everything else we're doing, conduction and convection. We do not have temperature raised to a power. And so it's usually a temperature differential, a temperature difference. But here we're raising temperature to the power and consequently we need the temperature to be in Kelvin or things will go awry for us very quickly. So let's plug in the values into this equation. We have the emissivity 0.05, the area of her space suit we were told was three meters squared. The Stefan-Boltzmann constant, you're going to memorize this throughout this course because you're going to use it so many times. And then finally the temperature and it has to be in Kelvin. So the first one is the surface temperature of her suit. And let me put in the Kelvin there, I'll put in the units. So that's raised to the power four. And then the surrounding temperature we're told is minus 100 so that is 173 Kelvin. Also raised to the power four. Plugging in the values we find that the heat loss from her suit is 39.6 watts. So what does that mean? Well let's do a little bit of a conversion here. Let's figure out how much food she needs to eat in order to maintain that level of heat loss. And so if we look, one calorie, a dietary calorie is 4186.8 joules. So what I'm going to do, I'm going to convert the heat loss into calories. And we're going to convert this instead of calories per second. We'll do calories per hour because that's a little bit more of a meaningful number. That's dietetic so that is relating to food. And with this we find that the heat loss translates into 34 calories per hour. And I did some looking up of values to figure out what type of food would replenish her in maintaining her temperature. And there are different things. If she wanted to eat butter, she could eat one teaspoon of butter that has 35 calories but I don't think she wants to eat butter. If she has seedless raisins, I looked it up and 22 seedless raisins have 34 calories. So if this astronaut wants to maintain the overall balance and overcoming the heat loss she would need to eat 22 raisins within an hour. So that's about a raisin every two minutes. So anyways, that gives you an idea of how to apply a radiative heat transfer. We simplify things drastically by assuming it to be a gray body. So emissivity and absorptivity are related as well. We didn't look at many of the other aspects where things are really a function of wavelength. And so radiative heat transfer can get quite complex. We're going to keep it quite simple in this course. So we're mainly going to focus on conduction and convection. So those are the three forms of heat transfer. And what we'll do in the next lecture is we're going to take a look at combining the three together into a specific problem. But that'll be in the next lecture that we are doing that. So anyways, that is radiative heat transfer.


okay guys so just gonna get this last connection going that's the the camera so we've got the camera connection a bit of five volt i know you can't see it very well from here but everything now is soldered i've saved some extra bits of wire so i decided to take the grounds away from the ec's what i'm going to do now is just pop this this camera connection back on so those little wires pretty much all where they're supposed to be it's going to be simple enough just to just to tap that on and there we go number five volt could have probably cleaned up these connections a little tiny bit oh sorry that's not going to seem to get my my hands and my eyes coordinated in the same the same way so there we go you get the cam on there but you didn't actually get to see any of that i wouldn't have thought so my big club ends in the way just twist it up nicely so that's it i'm probably just going to tidy this up a little bit more see if i can just wrap this round here and uh just just so it looks a little bit more um you know i can keep them with the other ones that will annoy me it shouldn't do but it probably will do just because of the way it looks but so there we go we've got everything on so we got the vtx connected here we've got the smart audio back on rx4 we've got the receiver on rx3 rxtx3 and uh ground positive over here and we've got the boy god my hope i did that correctly and we've got the satellite receiver and the magnetometer is connected and leave here somewhere that's how i receive is connected over here for power and on there rxtx3 oh three four therefore yeah four so so my smart audio then is now on oh down what did i do there tx2 rx2 i can't put it there i need somewhere for my smart audio to go because i don't think that's i think i've put that actually i think i've actually put that on s bus this is why i say you know yes you're best checking and checking again and checking again because hey we all human we we make mistakes it's uh you get into a little bit of a run on things and yeah i've actually put it on the s bus so that's not going to work there so what i'm going to do now is put it somewhere else like over there on cx1 i think i don't know why i did that why did i do that i think it's because i was going to put the um that's right i considered putting the receiver on tx1 but then decided it might be better just being down here because the receiver sits about here you see and i plug it like this so i figured uh that maybe be better than having this slightly shorter cable here and it not being able to fit in correctly you know it fits more like that um i tell you what i'm going to do i'm actually going to do that i'm going to just going to move this out of the way i'm going to take the uh just trying to think which one's going to be less of a pickle because that's going to go in at the back here and that just about fits so i think yeah i'm going to i'm going to take these off now i'm going to get confused of which wires which are these two because we've really got a very small amount of room to work with as you can see so all i'll do is i'll look at the wiring diagram for the receiver and then deduce from doing a continuity test between the connection up here and the wire down here which one's which and it won't really matter anyway i mean at the end of the day all that will happen is it just won't work um and i'm wondering whether even in the software whether i could turn that round anyway possibly but i'm not guaranteeing i'll get i'll get it the right way around or maybe i'll just undo one at a time that might be the way to do it do one at a time pull it across hopefully it's all gonna fit if it doesn't then i've made a bit of a boo boo but that's you know hey man that's life that is life so that was um that's the transmit this one is the receive so as long as i don't as long as i just prep this end as well always a good idea just to chuck a little bit of sold on the pads because there's nothing on there at the moment so if i just prep this end as well before i take that one off i still know exactly which one's which but i can just uh spawn the pads slightly don't want to leave on there too long on the pads slightly there we go that'll do because it's got a hole in it i don't really approve of those i mean it does make a great connection but if you do something wrong you know if you do um fall into like human error trap which is hey easy done then uh then yeah you can uh put a button i'm just gonna make sure that i actually get this right because i don't want to keep getting in the soldering it's quite a nice neat soldering job and i don't want to mess it up really so this is the receive so if i keep that transmitter my fingers and i'll put the receive on here i keep saying it you see i won't forget it i know that if i just if i forget it for an instant that means i've got to go through the plover of figuring out which one's which oh i nearly did it there i just questioned myself in my head and just remembered just very quickly received so it's 50 50 isn't it but if i just remember that so i just put this uh i can't stress as well as how much just a pair of tweezers is going to help you out doing little things like this because uh that will make a difference and actually it looks like i've got a bit more a bit more ease to go there as long as it doesn't mind having to receive i don't see why it should have mind having to receive on um i mean it's there to be used right that you are i didn't see that it had a special purpose looking like it can be used but it can't actually be used there's transmit i wonder if because there's a tx5 there as well but i mean that's going to be no good to me at the moment but it might be worth me doing an experiment to see if i can actually connect to um the uh uart5 in some fashion there we go okay so i know that's all going to fit so now we just got a um we're on tx4 received for for the gps we're on three uh tx3 for the smart audio and now we're on tx and rx1 for the receiver but there are the pads there for rx5 and tx5 and a dac all right um we've even though it doesn't look like that one's connected on the five volt up to the board of course i've done it underneath so i can still get in a chip as well without having the cables coming out the outside i'm much prefer when they're in the inside this one here i've got no choice about but the rest of it is all on the inside so i do like that of course you know the ones that are going off outside that's not the case of course let me just make sure i can plug that camera in probably better off we'll put it in the right way around there we go now this is because i was going to just have a little go out the other night it's a night vision camera it's the night eagle and i was uh just going to take it outside and have a little look because it was really really dark i've done it before but i just wanted to play around a little bit i didn't actually go out got a couple of beers and fell asleep on the set but there we go okay so right this is ready really to be um connected up with the uh video transmitter so here there's the video transmitter so that like i say look it just fits which is perfect i mean it's not going to go anywhere even in the crash um so we're just going to get the the bolts on there that's still going to be ideal uh get a nice little twist and if it's a little bit too long to my thinking i'll just twist it up a little tiny bit more that's fine and that will fit in for the receiver and of course that's going to go through the middle of the frame through the middle of the frame then sit into the back of the gps uh receiver hello my door just blew open like hello come in all right so let me get the nuts and stuff on and i'll put the top back on and the now so for this board um it's got the new firmware on i think i can't remember did we do that we did didn't we we did it the other day i put firmware on there um so but i'd also copied my diff wall which means that my magnetometer and those settings i can just transfer straight to the board again and so it'll have it for this but of course this is a different setup to what it came off and so um it could be wrong for me to do it like that but to be honest with you i really do believe that i did it when i set it up i did it off the craft um because of course there's going to be all sorts of noise coming from this i mean there's that much noise that when i do plug it in um you're going to hear it through the microphone i heard that the other day and i got a funny feeling it's um because this microphone is actually wired backwards they've used the ground as the signal and they've used the inner red wire inside the sheath um as the ground and so i'm not possibly maybe not getting um getting the amount of shielding that i i should be getting from a shielded cable so i'll probably have to take that apart and do that i had to do it anyway one ends because of the um the cable will come loose and i kept thinking my phone was going that's because it kept doing all sorts of silly things when i only plugged in those cables um the cable will come loose right okay so i'm gonna now just sort out my soldering iron and we can turn that off because i'm gonna say that we should be okay that little correction there was good i've looked over everything else keep looking over it while i'm doing i'm just going to sort out that little vcc because it looks like a bit of a blot there just wants to look a little bit neater but i don't want to disconnect the wire at the bottom because again i've i've done those wires at the bottom i'm just going to have a little look at that because i've got a funny feeling with me just doing that i've disconnected the ground but no i haven't it's quite small to me see now i've just i've got a message from my opticians telling me my glasses are ready to go and get so that's going to be fantastic and no no that's not exactly true actually because you can't just go in and get them these days you've got to set up an appointment to go in there and get them um because of the old uh come blue and so we're going to stick a large bit of i don't know if we can see that on there there's a nice bit of sold one there just so i know like those in it switches off the air is not going to get to it and start gnarling up my tip all right okay guys so what i'm going to do now is i'm going to go away because i do need to get something to eat i'm not eating uh this morning so i do need to get something to eat and i'm going to come back when i put the nuts on and i'll put the top on um and then we're going to see about positioning the gps well it can only go basically where i want it to which is right above the stack i want it to go position central so i want it to be as central as possible but that's what we got so far i'm hoping it's not looking too gnarly because when i first did it and was quite tired you know i was quite quite happy with myself for it see you in a bit