Daniel Ho

16 Added | 6 Magazines | 1 Like | 1 Following | @daniel_ykho | Keep up with Daniel Ho on Flipboard, a place to see the stories, photos, and updates that matter to you. Flipboard creates a personalized magazine full of everything, from world news to life’s great moments. Download Flipboard for free and search for “Daniel Ho”

為什麼DNA裡沒有U(Uracil)?

先前提要:DNA與RNA的差異<p>究竟 A. T. U.三個鹼基之間的關係到底是情感上的糾葛還命運的安排呢? 讓我們繼續看下去<p>其實DNA有T RNA有U的說法有好幾種,例如也有以能量的觀點說明U比T還較不穩定等等,我就以較多人認同的兩個觀點來說,另外先後出現的順序還有一個有趣的證據,在澳洲著名的「墨奇森 …

Biology

A Space Laser Designed To Vaporize Dangerous Asteroids

DE-STAR could vaporize asteroids that threaten Earth in less than an hour.<p>DE-STAR is designed to vaporize or divert asteroids that threaten Earth. This isn't science fiction—I build things that have to work in practice. DE-STAR stands for Directed Energy Solar Targeting of Asteroids and …

迷戀海洋

文/紫鷸<p>一直都覺得,海洋生物有種神秘的魅力。<p>可當真要以美為主題,具體用文字來寫某個物種時,一下又不知怎樣做才好,眼前閃現的都是些游移不定的光影。<p>就像一部電影所描述的:幽藍幽藍的海,小船的尾跡裡發比夜空裡還要多的星光,忽然揮著長翅的巨獸從水中躍出,將身披的海水裡的星光打碎,藍綠色的火花飛濺……這樣的場 …

The Week in Review: Snowden Leaks Into Europe

Inside Flipboard / November 1, 2013<p>Edward J. Snowden remains in the news this week with the latest batch of files released proving the United States …

Visions of Earth 2012 - Photo Gallery

Photograph by Musadeq Sadeq, AP Images<p><b>December 2012</b><p><b>Afghanistan</b>—Overnight snowfall slows the pace of a Monday-morning commute in residential Kabul. The street is lined with flags heralding the opening of the Afghan parliament.<p>Photograph by Sergey Anisimov<p><b>December 2012</b><p><b>Russia</b>—Rosy from the bitter …

NOWnews 今日新聞

為什麼外星人音訊全無? | T客邦 - 我只推薦好東西

再轉念思考:宇宙已經有138億年的歷史,人類則打從20萬年前開始在舞台上出現,我們存在的時間只佔整個宇宙歷史的0.01%.在數量這麼龐大的外星世界中,其他智能物種應該早就有機會出現,並且早該已經向整個銀河系強力宣傳他們的存在。<p>要是任何智能物種曾發展出星際交通工具,不用幾千萬年,他們應該就可以完全攻佔 …

網路世界的誠實與謊言

文/ 劉育志、白映俞<p>諾貝爾文學獎一九九八年得主薩拉馬戈,在得獎小說《盲目》扉頁裡引用《勸誡書》的金句:「若你看得到,就仔細看;若你能仔細看,就好好觀察。」似乎,拒絕謊言,不要成為盲目的「睜眼瞎子」,只要用心就可以了。<p>事情是這樣的嗎?<p>數十年來的研究發現,人類很難察覺對方是否正在對自己說謊,猜對的機會大 …

APOD: A Landing on Planet Earth (2013 Sep 14) Image Credit: NASA, Bill Ingalls http://apod.nasa.gov/apod/ap130914.html Explanation: With parachute deployed and retro-rockets blazing, this spacecraft landed on planet Earth on September 11 (UT) in a remote area near the town of Zhezkazgan, Kazakhstan. Seen in silhouette against the rockets' glare, the spacecraft is a Soyuz TMA-08M. Its crew, Expedition 36 Commander Pavel Vinogradov and Flight Engineer Alexander Misurkin of the Russian Federal Space Agency (Roscosmos), and Flight Engineer Chris Cassidy of NASA were returning after five and half months aboard the International Space Station. The Soyuz retro-rockets fire very quickly and for an extremely short duration near touchdown. Capturing the moment, the well-timed photograph was taken from a helicopter flying over the landing site. http://www.nasa.gov/content/expedition-36-soyuz-landing/ http://www.flickr.com/photos/nasahqphoto/9719668947/ Starship Asterisk* • APOD Discussion Page http://asterisk.apod.com/discuss_apod.php?date=130914 #APOD

Should We Really Be Encouraging People To Buy Books?

Amazon's MatchBook service makes getting a printed book/Kindle copy bundle cheaper. But that takes us backward, environmentally speaking.<p>Yesterday, Amazon announced the new MatchBook service, which offers a deeply discounted Kindle version of a book when you buy a new copy of the physical version. …

Big Pic: A Martian Eclipse That Looks Like Googly Eyes

As the Mars rover Curiosity glances up at the sun, one of the moons that orbits its new home passes in front of the sun.<p>On August 17, life on Earth was fairly ordinary. It was a warm summer Saturday here in the northern hemisphere, a sunny day in which couples were married, beaches were lain on, …

Chernobyl Now

Are nuclear disasters the new normal?<p>On April 26, 1986, two powerful explosions tore through Unit 4 of the Chernobyl nuclear power plant, flipping the reactor's giant 2,000-ton concrete lid into the air like a coin. White-hot chunks of the nuclear core rained down on adjacent buildings, setting …

Google 搜尋預測、拼字檢查、與即時翻譯背後的統計模型:n-gram

<b>文 / T.S.Yo</b><p>n-gram, the final frontier, 喔,不是,更正:是一種統計模型,源自於夏農(Claude Shannon)的資訊理論(information theory),而主要應用在「自然語言處理」(natural language processing)跟「基因序列 …

15歲加拿大女孩發明不用電池的手電筒

一位15歲來自加拿大的女孩安.瑪可辛斯基(Ann Makosinski)在當地的科展中,發明了一個不用電池的手電筒。那麼這個手電筒是如何發電的呢?答案是<b>手溫</b>!<p>這個手電筒內置了一個「帕爾帖電熱片 (Peltier tile)」,它會因為兩面的溫度不同而產生電流,或稱「電熱效應(Thermoelectr …