The Simpson’s Paradox occurs when parts of the data show one trend but the combined one shows another. For example, you ran a between-subject study testing whether a tool helps college students solve hard math problems. The data shows the…
Notes on Centrality in Social Network Analysis
There are three types of centralities: Degree centrality: measuring a node’s centrality by its in/out degree (i.e., how many in/out nodes are connected to a this node); Closeness centrality: measuring centrality by summing the distance from a given node to all…
Response to [Unreliable research: trouble at the lab]
Summary Overall, this article provides a holistic insight into how published academic studies are likely to be flawed, why, and why replication is not going to be easy. Nuggets Type I error: thinking something is true when it is not…
The Balcony Moment
When I was in Boston, my friend took me to the building where he said Boston Legal was shot. He pointed to me where that balcony was – that balcony where Denny Crane and Alan Shore would go to at the…
對話杜琪峰
杜琪峰光臨Toronto嘅「A Century of Chinese Cinema」,於是有幸親眼見偶像導演一面。 啱開始個陣講劇本。佢話佢拍過嘅好電影都冇劇本。「暗戰」冇劇本,「槍火」都冇劇本。都係拍之前先至同幫演員一齊商量場戲點拍。 又講「阿郎的故事」。杜琪峰話最尾個場周潤發部電單車爆炸個場:拍之前個特技同佢講,呢場戲,拍成佐,斷兩隻手指公;拍唔成,斷頸!咁梗係排成嘅啦。第二日個杜琪峰見到個特技,真係繃帶包住兩隻手指公。 當晚係播嘅戲係佢嘅兩部「黑社會」。個主持問佢關於呢部戲有咩值得講嘅故事。杜琪峰惗左下,然之後講,「王天林」。佢話拍個部戲嘅時候王天林係三句臺詞都記唔住。有一次拍場戲有十幾句,拍佐成朝。佢又唔好講佢喔,因為王天林係佢師傅;只可以同佢講「慢慢拍,唔緊要」。杜琪峰話佢個日成個片場搵嘢食﹣「搵嘢塞住把口啊」。 其實,杜琪峰都算個種不係好鍾意講嘢嘅人。同前幾期過來嘅施南生完全不同。有時候佢甚至乎好似不「識」講嘢。第一,佢唔識講英文,需要一個口譯幫助佢同個主持溝通;第二,唔識英文就算啦,但系佢有時好似同個口譯講嘢多D,塊面都唔對住個主持……可能攰佐啦;佢自己都講有jet lag。 我都大膽舉手問佐佢一個問題:點評價「無間道」。杜琪峰話,佢都唔係好適合評價,因為劉鎮偉係佢當年嘅副導演來嘅 。「Good movie」﹣就得咁樣一句。後尾惗下,佢大概係答記者提問答慣了,關於呢D容易被亂寫嘅問題特別小心。佢只係攰啫,又唔傻。
城中相識盡繁華 ﹣ Brussels遊記
在Bruxelles Midi下車,車站里開始出現英文了(同時還有法文、德文、荷蘭文 -_-);也開始看到巧克力店了。住的hostel離車站有兩站地鐵。Brussels的交通票名字很有意思,在英文界面里,一張票是「1 jump」,十張的叫「10 jumps」。Brussels街上都是輕軌,乘客們大概都是literally jump上jump下的。 住的hostel叫Sleephere,非常贊。說是hostel,其實是host Karel自己的house改裝的。房間整齊乾淨,有早餐,有花園,有一條狗,還有Karel的兒子在樓下彈著鋼琴。Karel這個host,用美國話講是很laid-back,用中國話講是大大咧咧。這個性格很奇妙地給旅客們一種很放鬆的感覺。住的期間我經常在屋裏各處遊蕩。第二天的早晨我就躺著花園里;大黃狗默默的跟出來在旁邊曬太陽。 ~ ~ ~ Brussels第一站,(現在回憶起來大概也是最贊的)是Horta Museum. 這個Museum就是建築師Victor Horta自己設計和建造的家。這個屋子給我的感覺好像回到Antonio Gaudi在Barcelona的Casa。不同的是Horta沒有Gaudi那麼想像力豐富。Horta的設計更注重細節和實用性,而且更注重屋裏的用品以及擺設,更讓人有想住進去的衝動(Horta自己就住了進去)。 除了Horta Museum,我去的其他景點都在Brussels的市中心。說起Brussels,同學們大概都知道Manneken Pis(小盆友尿尿的雕像)。 回想一下,這個只是個非常有名的景點,有名到你都不知道背後的故事,只要去到,見到,拍到,就夠了。在Brussels的兩天里,我至少三次經過Manneken Pis:第一次很激動﹣啊啊啊終於見到了;第二次純屬意外,咦怎麼又回到這裏了;第三次很超脫,我遠遠的看著其他遊客們懷著似曾相識的激動心情圍著雕像拍照,然後默默的繞過他們…… Belgium有名的有哥特式建築(Gothic architecture),Waffle,巧克力。還有一個常被忽略的:卡通。我們童年的好朋友Tintin和Smurfs都是在這個國度誕生的。還有其他很多很多的卡通、漫畫,盡在一個叫Belgian Comic Strip Center的地方。 記不記得電影「飯禱愛」(Eat, Pray, Love)里,Julia Roberts在意大利的一家人擠人的Cafe里怎麼都擠不到前臺下單。Brussels的 Noordzee Mer du Nord就有這種風格。其實還好,這是一家戶外的海鮮……啊姆,用美國話講:food court。這個food court非常有名,前臺也是人擠人。Julia Roberts習慣了北美那種不小心走近別人幾寸都要道歉的文化,怎麼可能擠到前臺下單呢?其實你只要默默地,溫柔地擠進去,你就會漸漸地佔據一定的空間。一旦你的空間大小超過了一定的閾值,賣食物的人就會注意到你,然後你就可以下單了。身體接觸是難免的,不過你會發現周圍的歐洲人都忙著說話,完全沒有剩餘的內存去計算人際距離。所以雖然看上去很擠,其實一點都不擠。 仔細看看Brussels的地圖,就會發現遊客的雲集市中心好像被圈在一個「圍城」里:西北面是一條河,其他方向是幾條主幹道。Jump上輕軌,再jump下,走進那個「圍城」,你就會迷失在各種哥特式建築,Waffle,巧克力,和成群的遊客中。第一天傍晚我沿著「圍城」的西南面走,突然看到「城」的邊上有一個電梯,可以直接下降到「城」外。往城外望去,盡頭是夕陽,夕陽下是很普通的民居,沒有哥特式建築,大概也沒用那麼密集的Waffle,巧克力和遊客。Hostel一條友說別看景區那麼繁華,Brussels其他地方是很爛的。大多數遊客,包括我,大概不會親眼見到真實的Brussels:我們寧願只是迷失在「圍城」的繁華中。
Response to [Grounding in communication] by Clark and Brennan
One Sentence This paper describes ‘grounding’ – the process where the speakers and auditors establish mutual understanding of the topics that build up and proceed the conversation between them. “Our goal is to reach the grounding criterion: that we and our…
Response to [The conversational duet] by Falk
One Sentence This essay presents the concept of ‘conversational duet’ where two people take turns to speak on a topic, thus jointly contributing to the role of a single speaker. More Sentences “In conversations between three or more persons, two…
Notes of [Maths for CS] by Lehman & Leighton – Induction
Induction To proof P(n) is true for all n ∈ N, we prove the following: P(0) is true; P(n) implies P(n+1) for all n ∈ N. Write-up for induction Say you are going to use induction Clarify what P(n) is Prove base…
Notes of [Maths for CS] by Lehman & Leighton – Proof
Proposition A proposition is a statement that can be proved as either true or false. There are several kinds of propositions. A predicate is a proposition whose truthfulness depends on some variables; An implication is a proposition comprised of two…
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