My daily readings 11/11/2014

November 11, 2014

Posted from Diigo. The rest of my favorite links are here.

My daily readings 10/21/2014

October 21, 2014

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My daily readings 09/02/2014

September 2, 2014

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My daily readings 08/15/2014

August 15, 2014

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My daily readings 08/12/2014

August 12, 2014
    • About a month ago I got the request to create a video from one of the WebGL demos on this site (the rotating earth cube, showing population density). So, of course, I said yes, but creating high quality output of this animation wasn’t as easy as I thought. I looked at a couple of screen recording tools, but none were available for Mac that were free, offered a good resolution and high enough frame rate. To be honest, I didn’t really look that long since I thought it a good opportunity to see how I could get the content of just the single canvas/webgl element and export it to a movie.

       

      So basically, after some looking around, I came across this link where someone used websockets to export the content of the canvas and save these captures individually. Finally at the server side we can use ffmpeg to convert these captures to a movie. This looked like an interesting approach, so I did pretty much the same thing. I, however, used a simple vert.x backend for the websocket server.

    • This piece of code uses the toDataURL() function to get the data from the canvas element, next it converts it to a bytearray so we can easily send it as a binary websockets message. Making it binary is a bit of overkill for this example I guess, but this was the approach I had the best result with. And this is it for the websockets client part. One last important thing to note here, is that you should make sure you cal the “sendToServer” after the canvas is rendered. This might seem obvious, but costed me a lot of time bug hunting. I assumed that it wouldn’t matter if I added it before or after, since there is always something rendered on the canvas, and thus available to be sent to the server. Well… this isn’t the case. The canvas is apparently cleared at the beginning of the render loop, which caused a lot of black screens to be sent to the server.

Posted from Diigo. The rest of my favorite links are here.

My daily readings 08/07/2014

August 7, 2014
    • 上车前一定要绕车一圈检查车辆及环境,然后才能开始上车进行灯光测试。考试的时候一定要注意以下几个细节:

       

        1、起步打灯,不要忘了看看后视镜,因为实际上你确实是开车上路了,开车上路就要注意过往的车辆和各种障碍物。

       

        2、遇到机器报公共汽车站、学校这些的,要踩刹车,踩的轻重要是以机器能够感应到为准,既不能太轻,也不能一脚踩停了,总之练车的时候自己多留心留心,不同的轻重都试一试。

       

        3、变更车道,首先灯光打起,3秒后再打方向盘,很多人不到3秒就打了,当然你就挂掉了,我自己的方法是,打灯后,自己嘴巴轻轻的数1、2、3,看后视镜,变车道。

       

        4、过路口速度不能超过35码,师傅教我们路口的时候,用2档跑,一般没问题哟,还要记住左右观察。

       

        5、档位变换问题,自己要灵活一点,该提速就提速,该用4档跑的路就不要一直起用3档跑,不要等考试里程都跑完了,你还没有用4档跑过。

       

        6、考官或者机器没报指令的时候,你就按照自己的节奏开,就想象是开你自己的车,不要想太多了。

       

        7、掉头的问题,掉头要用1档掉头,为了稳妥起见,从一开始我就打定注意,掉头我就把车踩停,挂到一档,然后观察,在掉头。

       

        8、靠边停车。打灯,观察,找地方停车,减速,减2档,右边数字中间索线,车摆正,踩停,空档,手刹。考试完成。

       

        最后,祝大家驾考一路过关斩将,顺利拿到本本!

Posted from Diigo. The rest of my favorite links are here.

My daily readings 07/26/2014

July 26, 2014

Posted from Diigo. The rest of my favorite links are here.

My daily readings 07/21/2014

July 21, 2014
    • 要是有地方教育局的背景,又特想搞社交,可以搞类似 一起作业网 的模式,帮老师搞班级管理,留作业答疑。
      而且还不用花钱买流量了,投半天广告其实不如学校老师说:同学们,你们都多上上xx网,很好,对学习有帮助。
    • 再说你结尾说到的答疑,做app的话应该有前途,数学公式、几何图形输入要解决好,可以看看疯豆网,记得他们有这方面的专利。
      但答疑只是一个引子,从产品结构和营收上都会很单薄。疑问背后隐藏的是学生对这方面知识掌握不足,这时候就可以利用你的课程资源,顺带卖卖课,发现问题,解决问题一条龙服务,学好了给好评,再来哦亲~

Posted from Diigo. The rest of my favorite links are here.

My daily readings 07/09/2014

July 9, 2014
    • 移动端
      辣妈帮绝对刚刚的呀!手机端活跃人数就我所知是肯定第一的!
      宝宝树在手机端也有不错的发展,也挺不错的。
      其他网站都在陆续跟进,移动端将会是他们下一个核心战场。
    • Weave: Talk To Your Dentist Screen Shot 2014-03-25 at 10.09.24 AM

       

      Weave is a telephone service that better connects patients and their medical providers. Going to the dentist is roughly as fun as, well, going to the dentist. The company wants to make that better by helping dentists keep track of their patient information, and needs, integrating that into their communications system.

       

      Before Y Combinator, Weave had yearly recurring revenue of $790,000. Post Y Combinator, that figure is now $1.8 million, up 38 percent per month during the period. Weave picked dentists to start because they are wealthy and low on regulation. The product will scale into other health verticals. Weave charges $300 per month per location for its service. There are 190,000 dental offices in North America, indicating that its addressable market is quite large.

       

      Learn more about Weave on TechCrunch.

       

    • TradeBlock: Data Tools For The Bitcoin Industry

       

      “We’re the Bloomberg of Bitcoin” says TradeBlock’s co-founder. It’s a subscription platform of digital currency trading tools that includes a real-time market info, a bitcoin-mining calculator, deep research of trends, and an extra-premium communication network and analysis platform for top bitcoin traders. TradeBlock sells its software to investment funds, exchange operators, and professional traders. With Bitcoin trading volume increasing from $50 million in February 2013 to $5 billion in February 2014, there’s an increasing need for digital currency intelligence, and TradeBlock could position itself as the defacto tool for the industry.

    • Screen Shot 2014-03-25 at 10.58.10 AMCambly: Using Smartphones To Learn English

       

      Cambly provides a mobile app that connects students who want to learn a language with a native speaker who can help them learn. The company is growing fast thanks to the confluence of a couple of big trends — there are billions of people who want to learn English, and there are billions of people with smartphones.

       

      Cambly charges students $20 an hour and pays $10 to native speakers who wish to talk with them. But they aren’t professional teachers — they’re just regular people, and students are more than willing to talk to them. Cambly is growing at a rate of 30 percent month over month since launch 10 months ago, and shows no sign of slowing down.

       

      Learn more about Cambly on TechCrunch.

       

    • Zinc: Find Low Prices Online Screen Shot 2014-03-25 at 10.48.18 AM

       

      Zinc is a browser plug-in that helps shoppers find the lowest price online. After shopping as they usually do, users click the Zinc button, and the app fills the order. Zinc then sources the item from any place online, presumably taking a cut of the differential between the price that the consumer was offered, and its final cost.

       

      According to a graph shared on a slide by the company, its run rate is over the $2 million mark, and it has accreted 12,000 users in the first six weeks of its life as a public service. Zinc depends on both algorithms and humans to source its deals.

       

      Learn more about Zinc on TechCrunch.

       

    • MemeBox: Korean cosmetics-as-a-serviceScreen Shot 2014-03-25 at 11.07.23 AM

       

      MemeBox is a cosmetics company that vends its products only on the web, and mobile, allowing it to shave costs. Selling between the high end, and the very low end, MemeBox wants to find value at profitable price points.

       

      The company is currently generating $1.3 million in monthly sales and expects to end the year at a run rate of $150 million. Its lower-cost model of not having retail presence helps it have stronger margins than the traditional model would allow.

Posted from Diigo. The rest of my favorite links are here.

My daily readings 07/08/2014

July 8, 2014
    • 母婴社区宝宝树1月27日宣布获得来自好未来(原学而思)的 1.5 亿人民币战略投资,这是继 2008 年宝宝树获得经纬中国以及经纬美国投资的 1000 万美元第二轮融资之后的新一轮融资。本轮融资之后,好未来创始人张邦鑫将进入宝宝树董事会,对宝宝树战略寄予建议,而宝宝树和好未来将在线上和线下的产品上进行对接,完成“从孕育阶段至中小学时期教育的战略接轨”。

       

      宝宝树由王怀南、邵亦波和孙志俊创立于 2007 年,2007 年的中国,75 后父母开始占据主流,这些父母和父母之间有明显的特点——缺少沟通。沟通条件的稀缺来源于中国不再是熟人居住社会,而是向更现代的阶段靠近,都市人的居住环境开始变得冰冷。独生子女们又从小没有弟弟妹妹,缺少“准育儿”的借鉴,也不知道该如何为宝宝挑到放心、优质的用品,所以王怀南想从育儿记录、社区、知识、导购等几个方向满足育儿需求。目前宝宝树主要有早教盒子米卡、快乐孕期等 app 以及智能手表、智能相框等硬件产品。

Posted from Diigo. The rest of my favorite links are here.


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