27 persons discharged in the district

Panel Jamison Dance (twitter github blog) AJ O’Neal (twitter github blog) Charles Max Wood (twitter github Teach Me To Code Rails Ramp Up) Discussion 02:09 - Follow Up to 040 JSJ Conferences Broad Conferences vs Focused Conferences Utah Open Source/Open West Conference 2013 05:28 - Single Page Application Frameworks jQuery Backbone.js Ember.js pure.js plates.js AngularJS 15:10 - Path & Hash Routing Pushstate/Popstate sammy.js jquery.bbq localStorage == cookies history.js 22:23 - Synchronizing Your Data WebSocket Operational Transformation Lucidchart 24:51 - WebSockets cURL Socket.IO 32:44 - App Issues Memory 38:52 - When do you want a Single Page App? Jade LESS Picks Simple (AJ) Coding for Interviews (Jamison) Empirical Zeal: What does randomness look like? (Jamison) Aeron Chair by Herman Miller (Chuck) Allrecipes.com (Chuck) Book Club Effective JavaScript by David Herman Transcript AJ:  Yeah, I think I'm 26 still, for another 6 months. CHUCK:  Yeah. You have to count on your toes to figure it out. AJ:  Yeah, twice actually. Because once I'm already bent over, I just keep counting on my toes. I don't start back at my fingers. CHUCK:  [laughs] [Hosting and bandwidth provided by the Blue Box Group. Check them out at Bluebox.net.] [This episode is sponsored by Component One, makers of Widge Mo. If you need stunning UI elements or awesome graphs and charts, then go to WidgeMo.com and check them out.] CHUCK:  Hey everybody and welcome to Episode 41 of the JavaScript Jabbers show. I almost said Ruby Rogues. How tired am I? JAMISON:  Don't cheat on us, Chuck. CHUCK:  It's right after Christmas. JAMISON:  We know you have another family but we love you when we have you. CHUCK:  Oh, my gosh! Yeah, we had family here for two days and my wife panics when people are coming over and has to have the house immaculate. And then she kept getting tired or sick or having some other issues. So, I kept forcing her to go to bed and then staying up until 2:00 AM, cleaning the house. So, I’m totally worn out. Anyway, so this is JavaScript Jabber, it's not Ruby Rogues. If you want Ruby Rogues, go to RubyRogues.com and see what we were talking about over there. Last week, we talked about conferences and I know that AJ wanted to say something. I guess we usually do the introductions first. So, let's do that and then let AJ say his piece and then we’ll move onto our topic for today. So, this week on our panel, we have Jamison Dance. JAMISON:  Hi, guys! Merry Belated Christmas. CHUCK:  We have AJ O'Neil. AJ:  Yo! Yo! Yo!  Coming at you from the green Christmasphere of Virginia. CHUCK:  Oh, you're in Virginia? AJ:  Yes, I am. Visiting family. CHUCK:  Cool. And I'm Charles Max Wood from DevChat.tv. I just want to put a quick plug in for my Rails course. If you want to learn Ruby on Rails, go to RailsRampUp.com. It's kind of a guided course and you get a lot of access to me to learn it. So AJ, what was it that you wanted to chime in with, with the conferences that we couldn't get you in last week to say? AJ:  Okay. So, both Merrick and myself have had this same experience. So, we were talking about having the broad conference versus the focused conference, the broad talk or workshop versus the more focused one. And we both have come to the conclusions that having it more focused is better. With the conference, it's fun to go to a broad conference but even in that, like it’s nice to have the focused talks like the ‘Utah Open Source Conference’ which this year is ‘Open West Conference’. It's expanding out and they've got some big surprise. I'm guessing they got some nice speakers. And the call for papers for that opens on January 2nd supposedly. So, that's a really nice conference but it's broad but it’s still fun.

Use this link and code JAVAJAB to get 20% off your registration for FluentConf 2013! Panel David Herman (twitter blog Effective JavaScript) Ariya Hidayat (twitter github blog) Tim Caswell (twitter github howtonode.org) Jamison Dance (twitter github blog) Joe Eames (twitter github blog) Merrick Christensen (twitter github) Charles Max Wood (twitter github Teach Me To Code Rails Ramp Up) Discussion 00:48 - David Herman and Ariya Hidayat Introduction 044 JSJ Book Club: Effective JavaScript with David Herman 023 JSJ Phantom.js with Ariya Hidayat 01:54 - Parsing JavaScript and ASTs and Language Grammars 04:44 - Semantics 06:08 - Abstract Syntax Tree (AST) Esprima: Parser SpiderMonkey 10:37 - Lexer 12:16 - Writing your own language creationix / jack The C Programming Language 17:41 - Parser Generators JavaScriptCore 21:04 - Evolving a Syntax Automatic Semicolon Insertion Post correspondence problem Halting problem 28:05 - Language Design The Rust Programming Language 30:35 - Grammar Regular Expressions (Regex) Backus–Naur Form (BNF) Recursion How to Design Programs (HTDP) 38:00 - Recursive Descent Parsers 42:48 - Benefits of knowing language internals and syntax Apache Lucene - Apache Lucene Core LPeg - Parsing Expression Grammars For Lua 48:48 - Abstract Syntax Tree (AST) Picks Mass Effect 3 (Joe) A Beginner's Guide to Irrational Behavior | Coursera (Joe) Go write a programming language to learn one (Tim) Thumbs and Ammo (Jamison) ISM by Savant (Jamison) Vimcasts (Jamison) The iPhreaks Show (Chuck) Mozy (Chuck) Tech & Go Bright Pink Micro USB Cable (David) asm.js (David) Beyond Office Politics: The Hidden Story of Power, Affiliation & Achievement in the Workplace by Linda Sommer (Ariya) gotwarlost / istanbul (Ariya) Next Week Web Developer Skills Transcript JAMISON:  I am Linus Torvalds and I pronounce Linux, Linix. [Hosting and bandwidth provided by the Blue Box Group. Check them out at Bluebox.net.] [This episode is sponsored by Component One, makers of Wijmo. If you need stunning UI elements or awesome graphs and charts, then go to Wijmo.com and check them out.] CHUCK:  Hey everybody and welcome to Episode 54 of the JavaScript Jabber Show. This week on our panel, we have Tim Caswell. TIM:  Hello. CHUCK:  Jamison Dance. JAMISON:  Hi guys. CHUCK:  Joe Eames. JOE:  Hey there. CHUCK:  Merrick Christensen. MERRICK:  Hey guys, what’s up? CHUCK:  I’m Charles Max Wood from DevChat.tv. And we have two special guests this week. We have Dave Herman. DAVID:  Hey there. CHUCK:  Ariya Hidayat. ARIYA:  Hello everyone. CHUCK:  And these guys are so smart that we brought them back. So, if you’re interested, we’ll put links to the episodes that they were on. David was on when we talked about his book ‘Essential JavaScript’ and Ariya was on when we talked about PhantomJS. JAMISON:  Effective JavaScript. CHUCK:  Effective? What did I say? MERRICK:  Essential. CHUCK:  Essential? Well, it’s an essential book on Effective JavaScript. How’s that? [Laughter] MERRICK:  Good save. DAVID:  At least, you didn’t say Defective JavaScript. [Laughter] CHUCK:  No, that’s what I write. I’m really good at writing defective JavaScript. ARIYA:  Actually, there’s a book about Essential on Defective JavaScript. CHUCK:  I also want to announce really quickly that Fluent Conf has given us a discount code. So, if you want to get 20% off on your registration for Fluent Conf, just enter JAVAJAB and you’ll get 20% off when you register for Fluent Conf. Alright. Well, let’s get started. This is going to be a really, really interesting topic and it’s something that I’ve wanted to know more about for a long time. And I just haven’t delved as deeply into it as I would like to. And that is,

The panelists talk to Bart Wood about large single page JavaScript applications.

The panelists talk to Jenn Schiffer about using art to get and keep people interested in programming.

Episode Summary

Surma is an open web advocate for Google currently working with WebAssembly team. He was invited on the show today to talk about using web workers and how to move work away from the browser’s main thread. His primary platform is bringing multithreading out of the fringes and into the web. 

The panel talks about their past experience with web workers, and many of them found them isolated and difficult to use. Surma believes that web workers should pretty much always be sued because the main thread is an inherently bad place to run your code because it has to do so much. Surma details the differences between web workers, service workers, and worklets and explains what the compositer is. 

The panel discusses what parts should be moved off the main thread and how to move the logic over. Surma notes that the additional cost of using a worker is basically nonexistent, changes almost nothing in your workflow, and takes up only one kilobyte of memory. Therefore, the cost/benefit ratio of using web workers gets very large. They discuss debugging in a web worker and Surma details how debugging is better in web workers. 

Surma wants to see people use workers not because it will make it faster, but because it will make your app more resilient across all devices. Every piece of JavaScript you run could be the straw that breaks the camel’s back. There’s so much to do on the main thread for the browser, especially when it has a weaker processor, that the more stuff you can move away, the better.

The web is tailored for the most powerful phones, but a large portion of the population does not have the most powerful phone available, and moving things over to a web worker will benefit the average phone. Surma talks about his experience using the Nokia 2, on which simple apps run very slow because they are not being frugal with the user’s resources. Moving things to another thread will help phones like this run faster.  

The panel discusses the benefit of using web workers from a business standpoint. The argument is similar to that for accessibility. Though a user may not need that accessibility all the time, they could become in need of it. Making the app run better on low end devices will also increase the target audience, which is helpful is user acquisition is your principle metric for success. 

Surma wants businesses to understand that while this is beneficial for people in countries like India, there is also a very wide spectrum of phone performance in America. He wants to help all of these people and wants companies acknowledge this spectrum and to look at the benefits of using web workers to improve performance.

Panelists

• Charles Max Wood

• Christopher Buecheler

• Aimee Knight

• AJ O’Neal

With special guest: Surma

Sponsors

• Adventures in DevOps

• Sentry use the code “devchat” for 2 months free on Sentry’s small plan

• Adventures in Angular

Links

• Web workers

• Service workers

• Worklets 

• Ecto model

• Babel

• Swoosh

• Comlink

• WhatsApp

Follow DevChatTV on Facebook and Twitter

Picks

Charles Max Wood:

• For Love of Mother-Not

Surma:

• Follow Surma @DasSurma on Twitter and at dassur.ma

• WebAssembly Spec

AJ O’Neal:

• The GameCube Ultimate

• Pikmin for Wii and GameCube

• Super Monkey Ball

Christopher Buecheler

• CinemaSins Sincast podcast

Teixeira, Joe

Lam, Harry C. S

Pickover, Clifford A

Badger, Michael

Badger, Michael

Sawyer, R. Keith (Robert Keith)

This study develops and validates a quantitative method to predict the pulmonary to systemic flow ratio in patients with congenital heart disease from chest radiographs using deep learning.

To the Editor We read the recent article by Klauser et al with great interest. While the potential implications of the findings are exciting, we have several concerns. First, the authors do not explicitly state whether electrocardiogram gating was used in their study. This is an important detail because cardiac motion artifact is a source of artifactual coloration with dual-energy computed tomography (DECT), particularly with dual-source scanners given the approximately 80-millisecond temporal difference between the 2 radiography beams. Furthermore, beam hardening artifact from calcified atheromas and partial volume effect, known sources of artifacts in the 2-material decomposition algorithm of DECT, may largely explain the findings. While patients with gout had higher prevalence of coronary calcification (55 of 59 patients [93%]) and cardiovascular monosodium urate (MSU) deposition (51 of 59 patients [86%]) than controls, the authors do not report whether the 4 patients with gout without coronary calcifications exhibited MSU deposition nor the number of controls or cadaveric hearts with coronary calcification. The images from the article show areas of green pixelization occurring adjacent to calcified plaques on grayscale computed tomography images (eg, Figure 2A and D, left anterior descending artery [yellow arrowhead]), which would favor this artifact hypothesis without additional data.

In Reply We appreciate the valuable comments of Becce et al on our article. We applied prospective electrocardiography gating using a thin-slice cardiac protocol to ensure highest spatial resolution with minimal motion artifact. A noncontrast electrocardiography-gated computed tomography (CT) examination with standardized scan parameters was performed using a 128-slice dual-source CT (SOMATOM Definition Flash; Siemens) with a detector collimation of 2 × 64 × 0.6 mm, rotation time of 0.28 seconds, and prospective electrocardiography triggering for heart rates less than 65 beats per minute (diastolic padding, 70% of RR interval) and more than 65 beats per minute (systolic padding, 40% of RR interval). Axial images were reconstructed with 0.75-mm slice width, increment of 0.5, and a medium-smooth convolution kernel (B26f). When motion artifact was present, it was distinguished by visual analysis of an experienced observer and colorized pixels related to motion were excluded.

Hardt, Judith Nora, author

Clavijo, Katherine, author

Singh, Ashok K., author

Shah, Monali, author

Authorities in Telangana have identified 36 units dealing with industrial gases and will carry out an audit of these industries considering the gas leak at LG Polymers in Visakhapatnam.

Hayden Library - TP331.B55 2017

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