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Roger Chen

Social Network Sites: Definition, History, and Scholarship - 0 views

jcmc.indiana.edu/...boyd.ellison.html

social network research web2.0

shared by Roger Chen on 26 Jun 08 - Cached
  • We define social network sites as web-based services that allow individuals to (1) construct a public or semi-public profile within a bounded system, (2) articulate a list of other users with whom they share a connection, and (3) view and traverse their list of connections and those made by others within the system.
  • Early public online communities such as Usenet and public discussion forums were structured by topics or according to topical hierarchies, but social network sites are structured as personal (or "egocentric") networks, with the individual at the center of their own community. This more accurately mirrors unmediated social structures, where "the world is composed of networks, not groups" (Wellman, 1988, p. 37).
Roger Chen

Google Makes us Stupid « Synthèse - 0 views

synthese.wordpress.com/...googlemakesusstupid

internetwatch recommender thinking

shared by Roger Chen on 24 Jun 08 - Cached
  • One reason that is often given for building recommenders, particularly in the context of a digital library, is that it is supposed to help address the information overload problem. However, one can easily argue that the converse is true.
  • Thus, a recommender actually adds to the information overload problem and thus exacerbates the attention deficit problem that Carr complains about in his article.
  • perhaps we should focus on what’s in front of us instead of fretting about whether we’ve reached 100% recall.
Roger Chen

Continuous Partial Attention: Software & Solutions - ReadWriteWeb - 0 views

www.readwriteweb.com/...ntinuous_partial_attention.php

internetwatch thinking

shared by Roger Chen on 04 May 08 - Cached
  • The ways in which we consume and pay attention to information are changing. The changes are not minor, they are big and profound.
  • Today we have successfully replaced attention with what Linda Stone coined and Marc Orchant recently wrote about: Continuous Partial Attention.
  • There are two major axis that cause inattention - the amount of information and the interrupts.
  • ...1 more annotation...
  • There are many things you can do to regain control over your attention and shut out the distractions. But the simplest thing you can do is to turn off the alerts and alarms when you're working on projects. I said simple, I didn't say easy.
  • Roger Chen on 04 May 08
     
    The ways in which we consume and pay attention to information are changing. The changes are not minor, they are big and profound. There are two reasons causes inattention - amount of information and interrupts.
Roger Chen

Our need for real-time information consumption is pointless « Alexander van E... - 0 views

vanelsas.wordpress.com/...ation-consumption-is-pointless

InternetWatch web2.0

shared by Roger Chen on 14 Jan 09 - Cached
  • We write blogs, create news, produce content, act as journalists, and there are plenty of platforms that allow us to spread our message
  • We are eager to share personal information, wishes, needs, thoughts, ideas, emotions, friends, locations. To find information we use Google, news sites, rss feeds, aggregators, aggregators that aggregate aggregators, news feeds, tweets, social networks.
  • There are no short cuts to knowledge, no matter how much processing power and storage capacity we throw at it.
  • ...3 more annotations...
  • As transaction costs to produce, distribute and consume information drop to zero the question arises if the information value itself drops to zero too?
  • If I ask you to remember the last conversation you had that made you laugh or cry, chances are pretty high that this conversation was a real-life one, not an online one.
  • It is for that reason I tend to be rather skeptical of our current online efforts to get information to us via search, sites, aggregators, rss, social networks, soon all in in real-time.
Roger Chen

Following Up On The Value of Noise - ReadWriteWeb - 0 views

www.readwriteweb.com/...owing_up_on_the_value_of_n.php

internetwatch reading social media

shared by Roger Chen on 18 Oct 08 - Cached
  • We don't want to argue that noise is always good, it's clearly important to spend some time without it every day.
  • Filtering isn't everything it's cracked up to be, though, and you wouldn't want to live in a fully filtered world all the time. Social media noise is an essential part of learning and living on the web.
  • It's one thing to find something you didn't know you needed right now, it's a whole other skill to be able to recall information that seemed marginally useful at best in the past at a time in the future when the need for it arises. Who can't remember doing that before? The ability to recall passively collected information that was gathered purposelessly in the past and put it to use in the future is a particularly powerful form of intelligence
  • ...7 more annotations...
  • Some people call it "serendipity," others call it "passive and opportunistic information acquisition." (Erdelez, see below.) The less limited the boundaries of your scope of view are, the more likely you may be to find things you didn't even think to look for.
  • Some people worry that being exposed to too much information will lead to not remembering very much of it. Scientists say that's not necessarily the case, though.
  • Quiet time, time off-line, deep thoughts and long books are all beautiful things - essential to a healthy intellectual, psychological and social life. We argue, though, that the opposite of all those things - online social media noise, is also a great opportunity that deserves to have its worth recognized at a time in history when many of us are struggling to deal with it.
  • Serendipitous search in the offline world is believed to be one of the ways our understanding of the world expands.
  • it's an interesting understanding of the way that swimming through noise helps us become who we are.
    • Roger Chen
      Roger Chen on 18 Oct 08
       
      !?
  • Erdelez argues that when prompted about a particular incident of accidental discovery our memories are better than we might think.
  • I think what makes noise unbearable is the guilty feeling we have to not read everything. But if we takes some times to dive in the noise, without feeling guilty of what we have missed, it is just a positive habit.
Roger Chen

石墨工房 5.1β - 評論記事 - 給需要擁抱的媒體一個擁抱 - 0 views

fred.ipod.to/blog

thinking reading

shared by Roger Chen on 25 Oct 08 - Cached
  • 我仍然尊重記者必需的專業與訓練，許多「公民記者」的撰述並不能成為獨立而平衡的報導（當然，很多專業記者也做不到），但卻提供了另外一種觀點、或是突破會讓主流媒體大招牌卡住的限制，讓我們有更多的資訊可以選擇。
  • 無論主流或是公民媒體，我基本上都抱持著一種「照單接收、但不信任」的態度；理論上（只是理論上），真正的事實來自不同資訊來源之間的交叉比對
  • 現在，我們對於新聞來源有更多選擇、但也必須自己幫自己篩選。基本上，沒有任何來源是完全可信的；甚至有很多資訊來自不能說的弦外之音。如果不花那個力氣去幫自己判斷、比對、過濾新聞，那麼我們接收到的訊息品質，其實跟媒體開放之前沒有太多差異。
  • ...1 more annotation...
  • 在這個媒體價值混亂的時代，如果沒有那種幫自己掛上主流標籤的豪氣與自信、沒有那種走進人群承認自己需要關切（也就是承認自己有弱點）的自省，那麼主流媒體需要的恐怕遠不只是擁抱而已。
Roger Chen

什么是"同行评议"？ 学海拾贝 学海拾贝 图谋博客 - 0 views

libseeker.bokee.com/viewdiary.41378104.html

academia research

shared by Roger Chen on 12 Mar 09 - No Cached
  • 目前国内讨论较多的是狭义的同行评议，即作者投稿以后，由刊物主编或纳稿编辑邀请具有专业知识或造诣的学者，评议论文的学术和文字质量，提出意见和判定，主编按评议的结果决定是否适合在本刊发表。一般的科技期刊是请2-3位评审人，也有更多的。这些评议人的评议结果，将直接影响到主编对被评议的文章所做出的最终评定。除此以外，广义的同行评议不止于此，还包括文章发表以后由专门组成的审议小组 (Journal Clubs) 对文章发表后的交流和应用效果进行评议，其中也包括对投稿阶段的评审意见进行探讨，这在医学科学类期刊尤为普遍。近年来新兴的免费期刊(Open Access Journals) 开创的公开评议 (Open Review) 或有些论文网站 (Paper Database) 采纳的自荐评议，也属于广义的同行评议。
  • 同行评议成为科技期刊出版的基石，公认是20世纪中叶以后的事。这与二战后科技进步引发的论文数量的激增和期刊种类和数量的翻番不无关系。可以肯定地说，没有同行评议就没有庞大的科技期刊出版业；同行评议的质量是期刊出版质量的先决条件和重要保障之一。
  • 传统的同行评议，通常强调两个基本点。一是匿名；二是独立思考判断。主编邀请的评议人大都是与论文内容相关的科研人士，希望听到的是他们依据各自的专业知识和经验，对论文做出独立的判断和评定。既要实事求是，又要开诚布公。
  • ...3 more annotations...
  • 同行评议的具体操作形式，可以根据作者与评议人之间的了解程度，大致分为三种。一种是单隐 (Single-Blind Review或 Single Masked Review )；二是双隐 (Double-Blind Review 或 Double Masked Review)；三是公开评议(Open Review)。
  • 目前除了主编邀请评议人外，也有作者推荐评议人的。而且目前采取这种运作方式的科技期刊呈上升趋势。越来越多的期刊在投稿阶段，邀请作者向编辑部建议自己论文候选的审稿人（3-5人不等），也有的刊物同时邀请作者指出应该避嫌的评议人或绝对应该回避的人名单。
  • 出于种种原因，目前学者们对同行评议有不少意见。抱怨较多的是评议过程马拉松，审定意见有偏颇，评议人固执己见，无中生有，甚至借机偷窃他人论点等等。这些弊病除了评议人自检自律以外，主编的督察和作者的申辩都会起到积极的监督作用。另外值得一提的是，现阶段的评议手段对抄袭和一稿多投几乎一愁莫展，而这恰恰是目前科技期刊发展的重要隐患之一
Roger Chen

继承传统,不能脱离时代_谢泳的BLOG_新浪博客 - 0 views

blog.sina.com.cn/...blog_49bc0c890100ax9x.html

china reading thinking

shared by Roger Chen on 14 Oct 08 - Cached
  • 钱穆过去讲，一个本国公民对于自己本国以往的历史应具温情与敬意，现在人们大体可以做到这一点。
  • 一种文化的产生，不能脱离它的时代。中国文化是在农耕时代这个背景下产生的，并达到了这个历史条件下所能达到的最高程度。在面对当时可能产生的所有问题时，中国文化基本都有高明的理解和解释，同时也寻找到了承传这种文化的最佳方式。
  • 今天提倡背《四书》，在知识的承传上，它本身已经没有意义，因为现代保存知识的手段非常丰富，就个人获得知识和养成人格来说，简单背诵只是第一步，但在现代社会，它所要付出的成本却很高，这个成本还不是一个简单时间问题，而是这种背诵的实际意义
  • ...2 more annotations...
  • 在传统时代，中国文化在事实上寻找到的继承方式所以可行，并能产生作用，主要是没有脱离时代，那种知识，在当时的历史条件下，可以达到经世治用的目的，半部《论语》治天下，在事实上也是一种经验表述和总结，但在今天，这一切就未必能有这样的功效了。也就是说，那时代读经就够用，而现在不够用了，或者说在道德上够用，而在知识上早已不够了
  • 管理现代国家，控制现代社会的知识，传统经典中所能提供的东西毕竟有限。重视传统文化没有借，提倡全民读经，总比“批林批孔”好，背诵十三经，肯定比背诵“老三篇”好，但一切文化继承，绝对不能脱离时代。
Roger Chen

PageRank in academic publishing « Peter Rohde's Blog - 0 views

peterrohde.wordpress.com/...agerank-in-academic-publishing

academia search

shared by Roger Chen on 02 May 08 - Cached
  • The standard measure scientists use to judge the importance of scientific papers is a simple citation count. That is, how many other papers cite the paper in question? While this measure has its merits, it has one fundamental flaw - not all citations are equal.
  • Numerous authors/bloggers have advocated using a PageRank-like index for quantifying the importance of papers or journals
  • To represent the web we use a directed graph, where the edges carry a direction.
  • ...4 more annotations...
  • The goal of the PageRank algorithm is two-fold. We wish to construct a measure of relevance that, first, is related to how many incoming links a site has, and second, what the importance of the source of those links was.
  • Well scientific papers can be mapped to a graph in a similar way to web-sites. Specifically, vertices in the graph would represent papers, and edges citations. The PageRank algorithm can be applied out-of-the-box.
  • First of all, one could discount self-citations from the index
  • A second variation that one might try is to add a time bias when calculating the index, such that links from more recent papers carry more weight than from older papers.
  • Roger Chen on 02 May 08
     
    Numerous authors/bloggers have advocated using a PageRank-like index for quantifying the importance of papers or journals.
Roger Chen

Analysis: data mining doesn't work for spotting terrorists - 0 views

arstechnica.com/...k-for-spotting-terrorists.html

data mining reading research

shared by Roger Chen on 11 Oct 08 - Cached
  • Automated identification of terrorists through data mining (or any other known methodology) is neither feasible as an objective nor desirable as a goal of technology development efforts.
  • criminal prosecutors and judges are concerned with determining the guilt or innocence of a suspect in the wake of an already-committed crime; counter-terror officials are concerned with preventing crimes from occurring by identifying suspects before they've done anything wrong.
  • The problem: preventing a crime by someone with no criminal record
  • ...3 more annotations...
  • In fact, most terrorists have no criminal record of any kind that could bring them to the attention of authorities or work against them in court.
  • As the NRC report points out, not only is the training data lacking, but the input data that you'd actually be mining has been purposely corrupted by the terrorists themselves.
  • So this application of data mining bumps up against the classic GIGO (garbage in, garbage out) problem in computing, with the terrorists deliberately feeding the system garbage.
Roger Chen

Should You Invest in the Long Tail? - 0 views

harvardbusinessonline.hbsp.harvard.edu/...article.jsp

internetwatch longtail

shared by Roger Chen on 30 Jun 08 - Cached
  • Roger Chen on 30 Jun 08
     
    Anita Elberse, a Harvard Business School associate professor, has a really interesting article in the new Harvard Business Review that analyzes some Long Tail data and challenges some of the theory's predictions.
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