Adrian Oldknow, Ron Taylor, Linda Tetlow - Teaching Mathematics Using ICT (3rd edition)
Published: 2010-06-10 | ISBN: 1441156887 | PDF | 328 pages | 8.88 MB

一般来说，在大热产品正式发布以前，配件厂商都会想方设法从供应链、代工厂之类的渠道挖掘消息，以求能提前做好准备，在新机开卖后第一时间抢占市场。这种做法相当普遍，但光明正大提前公开爆料的，印象里还真就只有刚刚发布了据说是 Galaxy Note 5 照片的耐尔金这一家。 根据其提供的照片来看，Note 5 仍将沿用 S6 / S6 Edge 的设计语言。不同的是，这次曲面玻璃被用到了背盖之上，看起来有点像是小米 Note「3D 弧面」背盖的弧度加强版。

In a new blow for the futuristic 'supersymmetry' theory of the universe's basic anatomy, experts reported fresh evidence Monday of subatomic activity consistent with the mainstream Standard Model of particle physics.

Elon Musk and Stephen Hawking have argued that autonomous weapons should be banned because of the threat they pose to humanity.

Hundreds of cats are loose on the streets, and food is running low for some residents of Athens' zoo.

This week an asteroid passed by Earth that was worth an estimated 5 trillion dollars in platinum. Big bucks, out there for the taking! Is it possible to mine precious metals in space?

E-ink 或许并没有像当初预期的那样借由电子书阅读器攻占市场，但仍然是有不少时不时就要更动一下内容，又不能太耗电的用途，让它可以一展拳脚。除了用在智能手表上、在超市里做为标价的标签、或是当个省电的手机副屏幕之外，如今悉尼又为它找到了一个新的用途：交通告示牌。 这主要是悉尼常常会因为特殊的节日或活动，而改变停车的规定 -- 因此原本必需要靠人力一个一个将沿路的停车指示换下来，但现在改用与一间名为 Visionect 的公司合作的 E-ink 显示之后，只要通过移动网络就能改显示内容了。这

如今还在坚持出翻盖智能机的厂商，除了日本的那些以外，最起劲的应该就当属 LG 了。而在今天早些时候，他们又发布了一款名为 Gentle 的新品。不过，除了 Android 5.1 Lollipop 和支持 4G 这两点以外，其它诸如 3.2 吋 480 x 320 屏幕、3MP 相机、1GB RAM、4GB ROM（可插卡）之类的规格，应该是无法吸引到哪怕是只有普通需求的消费者。换言之，和过去的几款 LG 翻盖机一样，Gentle 多半又会成为备用机或长者之选。

显示器还能玩出什么花样？三星告诉你，把它当成无线充电站其实也不错呀。早些时候，他们公开了两款全新的产品 S24E370DL 和 S27E370DS，两者的尺寸分别是 24 吋和 27 吋，最大的卖点，就是其基座部分可用于给支持 Qi 标准的设备进行无线充电（放在办公室感觉会挺实用呢）。除此之外，他们还搭载了 AMD 的防闪烁技术，可视角度达 178 度，预计会在今年末时正式推出。估计在九月的 IFA 上，大家就有机会见到真机，感兴趣的话不妨关注下啊。

Priceonomics published on Friday an in-depth profile of Hadley Wickham, author of many of the most popular R packages including ggplot2, dplyr and devtools. In the article, he reveals that his motivation for creating these packages was primarily to provide better ways of accomplishing routine tasks in R, an immensely useful contribution that sadly wasn't recognized in an academic setting.

Despite having shown various ways to overcome D3 cartographic envy, there are always more examples that can cause the green monster to rear it’s ugly head.

After a slight hiatus since the last release in early 2014, we are delighted to announce a new release of RcppZiggurat which is now on the CRAN network for R.

The RcppZiggurat package updates the code for the Ziggurat generator which provides very fast draws from a Normal distribution.

The package provides a simple C++ wrapper class for the generator improving on the very basic macros, and permits comparison among several existing Ziggurat implementations. This can be seen in the figure where Ziggurat from this package dominates accessing the implementations from the GSL, QuantLib and Gretl—all of which are still way faster than the default Normal generator in R (which is of course of higher code complexity).

This release contains a few internal cleanups relative to the last release. It was triggered by a very helpful email from Brian Ripley who notices compiler warnings on the Solaris platform due to my incorrect use of on integer variables.

R has a number of very good packages for manipulating and aggregating data (plyr, sqldf, ScaleR, data.table, and more), but when it comes to accumulating results the beginning R user is often at sea. The R execution model is a bit exotic so many R users are very uncertain which methods of accumulating results are efficient and which are inefficient.

一加手机在推出旗下首款产品 15 个月以来，已经售卖超过 150 万台，而且在海外的表现更是比在家乡 — 中国市场的成绩还要好。CEO 刘作虎在一加的娱乐室中作访问时透露，有 60 的销售量是来自海外的，对比去年十一月时的五五开增长不少。虽然国内的智能手机市场需求仍然很高，但刘作虎和另一创办人 -- 裴宇的眼光已经放在西方市场，还有印度。

经过了差不多 15 个月的等待之后，凭借初代产品在玩机人士中一炮而红的一加，终于在今天推出了二代旗舰 — 一加手机 2（OnePlus 2）。不过，得益于官方预热和工信部一如既往的可靠「爆料」，这款设备在许多人眼中其实已经没有那么神秘。但话虽如此，改进后的相机、屏幕，以及新的 USB Type-C 插口、正面按压式指纹辨识器和增设的「通知拨杆」，所有这些都仍有不少看头。而且，此番一加在国内的价格仍维持在 1,999 元起（海外涨价了），好奇他们这次会怎样「不将就」？跳转后来看看详细的动手玩吧。 ...

一个炒股的女性朋友发了一条微信:被国家强奸了好几遍，还是舍不得下床。国家每次掏口袋，我们都以为是要掏钱给我们，结果掏出来个套子，又按到床上来一遍..