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改造的firefox epub摘编插件比预料的好用，继续改造
改造的firefox epub摘编插件比预料的好用，继续改造。
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Siri’s first real competition hits Android phones today [video]
Archive for November, 2011
My daily readings 11/30/2011
November 30, 2011My daily readings 11/28/2011
November 28, 2011My daily readings 11/26/2011
November 26, 2011My daily readings 11/24/2011
November 24, 2011My daily readings 11/23/2011
November 23, 2011-
Randy Pausch Day | Hacker News
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Much respect to Pausch. One of my persistent fears is that, within sight of my own demise, I’ll be too paralyzed – with anxiety, with fear, with whatever – to make good use of the time I have left.
I have a profound amount of respect for a man who has defied that so completely.
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Randy Pausch Day – Carnegie Mellon University
Great teacher
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Mockingbirds and Simple Recursive Combinators in Ruby | Hacker News
My daily readings 11/21/2011
November 21, 2011-
A single line assignment filled with epic fail | John Graham-Cumming
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CSCI E-190 Bioinformatics Algorithms (Spring)
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CSCI E-205 Computing Foundations for Computational Science (Fall)
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CSCI E-207 Introduction to Formal Systems and Computation (Fall)
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CSCI E-215 Unix/Linux Systems Programming (Spring)
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CSCI E-220 Artificial Intelligence (Fall)
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CSCI E-234 Introduction to Computer Graphics (Fall)
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CSCI E-237 Programming Microsoft .NET (Fall)
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Intensive Introduction to Computer Science: Free Course Videos
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This course is an introduction to the intellectual enterprises of computer science. Topics include algorithms (their design, implementation, and analysis); software development (abstraction, encapsulation, data structures, debugging, and testing); architecture of computers (low-level data representation and instruction processing); computer systems (programming languages, compilers, operating systems, and databases); and computers in the real world (networks, websites, security, forensics, and cryptography). The course teaches students how to think more carefully and how to solve problems more effectively. Problem sets involve extensive programming in C as well as PHP and JavaScript.
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My daily readings 11/18/2011
November 18, 2011My daily readings 11/17/2011
November 17, 2011-
贝佐斯：亚马逊是科技界唯一一家低利润公司_互联网_科技时代_新浪网
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贝佐斯：绝对不是。我们喜欢Zappos独特的文化，但我们不想将这种文化融入亚马逊。我们同样喜欢自己的文化。我们对于完美客服体验的理解是，用户其实并不希望与我们直接对话。每次客户联系我们，我们都视为工作中的失误。我已经说了好多年了，人们应该与他们的朋友交谈，而不是与商家。因此，我们充分利用各种客服信息来探究客户联系我们的真正原因。什么地方出现问题了？那个人为什么要打电话？为什么他们花费时间与我们交谈而不是与家人交谈？我们如何解决这个问题？Zappos采取的就是一种完全不同的策略。
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Microsoft Research’s Socl Social Network Gets A Little More Real | TechCrunch
My daily readings 11/15/2011
November 15, 2011-
Dan Shapiro » Saving a life is easy, but I didn’t
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The problem with the first one is obvious. The problem with the second one is that the life-saving marrow transplant that Amit needs requires a donor with a similar genetic makeup, and South Asians are dramatically underrepresented in the registered donor pool.
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At the time, the only way to donate marrow was to basically have someone drill holes in your bones and drain your skeleton, which kind of terrified me. Nowadays, of course, most donations require nothing more than sitting still for a few hours with an IV watching television. But after a lot of introspection, I decided that it was a rare occurrence in this world that you actually get to save the life of a stranger, and if skeleton-draining was the price of that, then so be it. I was also reassured that most folks are never matched with anyone.
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Chris Shiflett ▪ The Truth about Sessions
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Because the web relies on HTTP for communication, maintaining state in a web application can be particularly challenging for developers. Cookies are an extension of HTTP that were introduced to help provide stateful HTTP transactions, but privacy concerns have prompted many users to disable support for cookies. State information can be passed in the URL, but accidental disclosure of this information poses serious security risks. In fact, the very nature of maintaining state requires that the client identify itself, yet the security-conscious among us know that we should never trust information sent by the client.
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Of particular note in this example request is that there is nothing within it that can be used to uniquely identify the client. Some developers resort to information gathered from TCP/IP (such as the IP address) for unique identification, but this approach has many problems. Most notably, a single user can potentially use a different IP address for each request (as is the case with large ISPs such as AOL), and multiple users can potentially use the same IP address (as is the case in many computer labs using an HTTP proxy). These situations can cause a single user to appear to be many, or many users to appear to be one. For any reliable and secure method of providing state, only information obtained from HTTP can be used.
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My daily readings 11/14/2011
November 14, 2011-
Fly Or Die: Giving Oink A Try | TechCrunch
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Oink is a way to rate things in the physical world on an extremely granular layer. You can rate a #burger or a #steak in a restaurant, a #rollercoaster in an amusement park, or a #shirt in a clothing store. You identify things with hashtags and get cred topic-by-topic based on the how other people vote for the things that you’ve said are good. The hashtags are also useful for a specific hashatag that’s been rated in your vicinity.
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Why Mobile Flash Died: An Adobe Employee Speaks Out | TechCrunch
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There’s also the issue of how users consume content on their devices. Smartphone users have the concept of “apps” drilled into their heads before they can even take their phones home, so it’s no surprise that they’ll turn to their respective app stores if they want to play a game. I sincerely doubt that average customers knew (or cared) that their devices played well with Flash, save for a few highly specialized circumstances.
Lastly, it was a simple matter of manpower. Adobe has been a fan of HTML5 for quite a while now, and it’s stronger position in the mobile space has become more and more apparent. Rather than devote time and energy to working on a platform that 1) needed to be tweaked for different OSs and hardware configurations and 2) would never be as widely-used as they would like, Adobe decided that those resources would be better spent furthering HTML5 development.
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(1) Oliver Reichenstein – Google+ – Revenue = X We've been experimenting with app prices for…
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No matter what price we choose, we always make the same revenue.
I attached two charts to illustrate that. I recently lowered the price of the iPad app (http://bit.ly/92xWv1) from 5 to 1 Dollars. At first the sales spike, then they even out to previous levels. Meaning: By cutting the price by factor 5, I am selling exactly 5 x more apps.
Then we lowered the price of iA Writer for Mac (http://bit.ly/jfsHdZ) from 10 to 5 Dollars. And the exact same thing happened. There was a short initial spike, then the curve fattened out to previous revenue levels. We cut the price in half and are now selling 2 x more apps. The same happened when we lowered to price from $17.50 to $10.
What I expected was that at a certain point the price change would impact the sales profit positively or negatively but it never did.
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移动IM爆发式增长 巨头涌入创业者差异化突围_互联网_科技时代_新浪网
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创新工场创始人李开复(微博)也向《中国经营报》记者表示，当一个三维、四维或更多维的领域，这些领域里可能已有很多大球存在，但是还有很大空间能放中球、小球。现在即时通讯已经成为手机上普及最快的应用，调查数据显示，96%以上的手机上网用户都在使用各类移动IM服务，移动互联网的即时通讯市场大有可为。未来移动IM虽然对于中小创业者在产品、资本、人才、运营上的挑战很大，但是从商务、教育等垂直细分领域切入，找到自己的空间，仍是创业者一个可期待的梦想。
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熊尚文介绍，“在这儿”的灵感正是来源于他的亲身体会。经常出席一些商务活动、会议，很想有针对性地找到合作伙伴。但是，每次活动现场有很多人，需要一一交流、交换名片，逐个了解对方，才能“碰运气”式地找到目标合作对象。而活动结束之后，有很大一部分人，因为时间关系，错过了和他们交换名片、交流的机会，以至于损失掉一部分“目标客户”。如果有这么一个软件，可以跨越时间、空间的维度，又可以在“一定的地理位置”、找到志同道合的人，是非常实用的，会给真正需要社交活动的人带去很多便捷。所以他创办了基于移动互联网的IM“在这儿”，要解决的就是这个问题。
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在移动互联网开发者大会上，很多人过来和熊尚文打招呼都说同样的话，“又看到你了”。熊尚文对此颇为无奈，因为他们作为创业团队，目前受资本局限，只能这样通过会议活动的展示让大家知道自己，先聚集一批用户，再逐渐形成口碑传播。当时，上线两个月注册用户才两万多。熊尚文知道，要切入垂直细分，就要面对用户范围过窄而带来的漫长的积累期。
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与走娱乐社交的微信和米聊相比，除了线上聊天，“在这儿”还增加了针对商务社交的“活动聚集”与“交换电子名片”的功能。虽然聚焦商务应用用户基数小，但是大都属于产品经理或CEO等的高端用户，活跃度与忠诚度随着参与活动的增多也带来了眼前一亮的表现。
IM产品都在尽可能的扩大自身的交友平台，为用户积累更多的人脉资源。单从积累效果来看，微信在社交方面为用户营造了“全民”关系圈，不管是熟人还是陌生人。而“在这儿”则打造的是“商务”关系圈，基于工作背景的人脉资源积累。在同类互动模式下，目的与圈子不同，这些都为“在这儿”奠定了差异化的基础。
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为什么做这款软件？唐岩回答的很简单，“在中国缺乏一款完全用于陌生人社交的工具”。于是一个十几个人的团队，每天工作十几个小时，一周工作六天，用几个月时间开发出了“陌陌”。
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陌生人交友的需求到底有多大？使用陌陌的用户表示，现实中会比较含蓄，交友渠道非常欠缺，如果借助于这样一个工具会增加很多互动性，吸引用户加入进这个陌生人之间的圈子。比如闲下来想找个人打网球、踢足球，都会变得很轻松。
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虽然陌陌在竭力专注于一款产品，但是与陌生人交友仍存在非常巨大的障碍。艾瑞分析师沈岁表示，陌生人交友本身面临的问题是，中国人很不喜欢与陌生人打招呼。尽管有一部分人会喜欢，但还是小众。建立的社交网在哪儿，用户就在哪儿，如何留住这部分用户会是陌生人社交的一大难点。
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好的技术人才偏向于去大公司，而处在创业初期的陌陌，唐岩通常是给他想要的人才画一个饼，告诉他未来这个市场有多大：“社交移动化未来会形成一个社交帝国，你想不想亲手搭建起来？”这句很具鼓动性的话语帮唐岩聚集了一批包含80后和90后的年轻团队。
正是因为人才的缺乏，让陌陌到现在仍聚焦在IPhone平台。唐岩认为，目前陌陌团队的人手只够做好一个平台，“不想一下子铺太开，希望用户数慢慢成长，毕竟用户来了并且留住了才是有效用户，这也是产品策略方面的问题。”
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易观国际分析师董旭认为，这个平台能够活跃起来，关系链是很重要的，但基于位置的陌生人间的活跃度很难保持，因为人的位置是不固定的。因此陌陌在未来，还需要设计出与位置相关的产品，才能逐渐与微信、米聊产生鲜明的差异化特征。
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