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Alex Ko

Alex Ko's Public Library

09 Nov 09

One Amongst a Multitude: Cynical or Idealistic?

  • A lot of people are either idealistic or cynical, and they take pride in being one and not the other. I think you need to be both.
  • You need to be idealistic about your vision.
  • 1 more annotations...

One Amongst a Multitude: Thoughts on Hiring: Why You Shouldn't Judge People Solely On Outcomes

  • The problem that I see with track records is, most people, especially when desperate for more help, never look beyond it and just take everything people with good track records say at face value, and don't dig any deeper.
  • A long string of successes often blinds us to luck's effect on those outcomes, and we start feeling an aura of invincibility and treating future ventures with an inevitability of success, which is very dangerous.
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One Amongst a Multitude: Take the Jump!

  • There will always be reasons not to do something risky, new, and unfamiliar. But if it's something you really want, then it's a waste of time doing something else. Just make sure it's not about prestige or money, because in the end, that's not what anyone's life should be about.

One Amongst a Multitude: On Choices, and Making Decisions

  • a lot of times, the only way to improve is to take a risk. Life is about probabilities, and the only thing you can do is to improve your odds.
  • All of us face decisions everyday, some of us never learn how to do it.

One Amongst a Multitude: Learning to Find the Right Solution

  • the lecture then test part
  • As a student, when you are facing a question on a test, you know that the expected answer can be constrained to something that you just learned.
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Russian Math, the Poincare Conjecture and Perelman - WSJ.com

  • American math culture has intellectual rigor but also suffers from allegations of favoritism, small-time competitiveness, occasional plagiarism scandals, as well as the usual tenure battles, funding pressures and administrative chores that characterize American academic life. This culture offers the kinds of opportunities for professional communication that a Soviet mathematician could hardly have dreamed of, but it doesn't foster the sort of luxurious, timeless creative work that was typical of the Soviet math counterculture.
  • It's all but impossible to imagine an American institution that could have provided Mr. Perelman with this kind of near-solitary existence, free of teaching and publishing obligations.

The returns to entrepreneurship « Startup Boy

  • Modern Internet entrepreneurship starts with a few engineers working for nothing and carrying latops and cellphones. They coordinate with Skype and Gtalk and Wikis and Bug Tracking sytems. The company itself is snapped together with outsourced HR, cookie-cutter incorporation and even financing, and outsourced finance / payroll. Marketing is done virally, or through SEO, or SEM. Customer service is handled via the community and forums. PR and outreach through tweets and blogging. Payments come via Paypal. Ads are served up by third-party ad networks. Storage goes on Amazon. Computer goes through Amazon, Softlayer or Rackspace. Code is built upon stacks of open source, SaaS, and $10/month services.


    What used to cost $1-$2M to start, now costs $10K. What used to cost $5M to build, now costs $250K. What used to cost $20M to go to market now costs $1M.


    But the upside hasn’t gone down. It has gone *up.* The 3 billionth person will be online shortly. They can all use your product. Network effects are stronger than ever, and some businesses become natural monopolies very quickly. Most of the products have no marginal cost of replication, so adding a new customer is pure profit.


    Less labor required. Less capital required. Less cost to scale. Larger markets. Cheaper marketing. No cost to ship more product.

  • The returns to scale for being smart, young, skilled, and high-energy have gone up tremendously, and that has profound implications for society. The smart are getting richer.
08 Nov 09

Teach Yourself Programming in Ten Year

  • Researchers (Bloom
    (1985)
    , Bryan & Harter (1899), Hayes
    (1989)
    , Simmon & Chase (1973)) have shown it
    takes about ten years to develop expertise in any of a wide variety of
    areas, including chess playing, music composition, telegraph
    operation, painting, piano playing, swimming, tennis, and research in
    neuropsychology and topology. The key is deliberative
    practice: not just doing it again and again, but challenging yourself
    with a task that is just beyond your current ability, trying it,
    analyzing your performance while and after doing it, and correcting
    any mistakes.
  • Computer science education cannot make anybody an expert
    programmer any more than studying brushes and pigment can make
    somebody an expert painter
  • 1 more annotations...
07 Nov 09

Lessons Learned: Marching through quicksand

  • Most pundits and the people I ask for advice fall into one of two camps. One is explaining the world as it used to work: the importance of gatekeepers, the scarcity implied by limited distribution, and the resulting quality bar that the industry is so proud of. The other revels in the world as we all know it will be someday: limitless distribution enabled by new technologies, the importance of collaborative filters, and on-demand availability of all content for end-users. The problem with engaging with either camp as an author (or “content creator”) is that neither camp is really addressing the world as it exists today.
  • Personal brands are displacing organizations brands.
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Lessons Learned: Validated learning about customers

  • I don’t think revenue is in and of itself a goal for startups, and neither is profit. What matters is proving the viability of the company’s business model, what investors call “traction.” Demonstrating traction is the true purpose of revenue in an early growth company.
  • Consider this company (as always, a fictionalized composite): they have a million dollars of revenue, and are showing growth quarter after quarter. And yet, their investors are frustrated. Every board meeting, the metrics of success change. Their product definition fluctuates wildly – one month, it’s a dessert topping, the next it’s a floor wax. Their product development team is hard at work on a next-generation product platform,
  • 8 more annotations...
04 Nov 09

Chapter3: Luie

  • The real problems
    to solve are not the ones at the end of each chapter in the textbook. The
    real problems come in dealing with the unexpected. The questions are vague
    and fuzzy. How do you pick a research topic? How long do you study a subject
    before you publish? What do you do when things don't look like you expected
    them to look, when your results surprise you? How do you recognize when to
    quit a not-completely-hopeless endeavor? Coping with these problems is the
    art of physics, and it is very similar to the art of business, or the art
    of art.
  • The real problems
    to solve are not the ones at the end of each chapter in the textbook. The
    real problems come in dealing with the unexpected. The questions are vague
    and fuzzy. How do you pick a research topic? How long do you study a subject
    before you publish? What do you do when things don't look like you expected
    them to look, when your results surprise you? How do you recognize when to
    quit a not-completely-hopeless endeavor?
  • 18 more annotations...
01 Nov 09

The Valley of My Dreams: Why Silicon Valley Left Boston’s Route 128 In The Dust

  • She noted that Silicon Valley had an amazing dynamism about it. There were extensive professional networks, job hopping was the norm, information was exchanged openly, and the culture encouraged risk taking. The Silicon Valley ecosystem supported entrepreneurial experimentation and collective learning. In other words, Silicon Valley was a very open network—a giant social networking site working in analog before the concept of such a thing even existed.


    This organizational mechanism was in sharp contrast to that of Route 128. Dominated by large, vertically integrated, and secretive minicomputer producers such as DEC, Wang, Prime, and Data General. Technology, skill, and know-how were trapped within the boundaries of the large corporations.

  • the meritocratic openness of Silicon Valley made it a magnet for non-traditional talent and immigrants
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31 Oct 09

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Journal of Eivind Uggedal: NoSQL East 2009 - Summary of Day 2

  • The problem with Hadoop is that analysis is typically written in Java.
    It’s single-input, two-stage data flow (map, then reduce) is rigid.
    Joins (distributed) are also hard to do in Hadoop.
    Java is simply to verbose for writing map/reduce jobs.
    Lastly, rapid prototyping and exploration is hindered by compilation.
  • At Twitter they run Cloudera’s free distribution of Hadoop 0.20.1, with
    a heavily modified Scribe installation for log collection straight to
    HDFS, and heavily modified LZO code for fast and splittable data
    compression. Data is then stored as either LZO-compressed flat files
    or serialized, LZO-compressed protocol buffers.


    Semi structured data at Twitter are: apache logs, search logs, RoR logs,
    MySQL logs, rate limiter logs, per-application logs.
    Structured data are: tweets, users, block notifications, phones, saved
    searches, retweets, authentication, SMS usage, third party clients, followings.
    Entangled data: the social graph (doesn’t really lend itself to be map/reduced).

  • 12 more annotations...
30 Oct 09

Journal of Eivind Uggedal: NoSQL East 2009 - Summary of Day 1

  • CoucbDB is very robust since it never overwrites previously
    written data. There are therefore not a repair step after
    a server crash, and one can take backups with cp.
  • A really interesting feature of the views are that they are generated
    incrementally. The views are stored in a B-tree and kept up-to-date
    when new data is added.
  • 8 more annotations...
25 Oct 09

The Atlantic Online | November 2009 | Does the Vaccine Matter? | Shannon Brownlee and Jeanne Lenzer

  • Nobody knows precisely why we are much more likely to catch the flu in the winter months than at other times of the year. Perhaps it’s because flu viruses flourish in cool temperatures and are killed by exposure to sunlight. Or maybe it’s because in winter, people spend more time indoors, where a sneeze or a cough can more easily spread a virus to others. What is certain is that influenza viruses mutate with amazing speed, so each flu season sees slightly different genetic versions of the viruses that infected people the year before.
  • t
    he healthy-user effect explained the entire benefit that other researchers were attributing to flu vaccine, suggesting that the vaccine itself might not reduce mortality at all
  • 21 more annotations...

The Answer Factory: Fast, Disposable, and Profitable as Hell | Magazine

  • To appreciate the impact Demand is poised to have on the Web, imagine a classroom where one kid raises his hand after every question and screams out the answer. He may not be smart or even right, but he makes it difficult to hear anybody else.
  • The focus on LTV keeps Demand away from any kind of breaking news coverage or investigative work, neither of which tends to hold its value.
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Be lucky - it's an easy skill to learn - Telegraph

  • I gave both lucky and unlucky people a newspaper, and asked them to look through it and tell me how many photographs were inside. On average, the unlucky people took about two minutes to count the photographs, whereas the lucky people took just seconds. Why? Because the second page of the newspaper contained the message: "Stop counting. There are 43 photographs in this newspaper." This message took up half of the page and was written in type that was more than 2in high. It was staring everyone straight in the face, but the unlucky people tended to miss it and the lucky people tended to spot it.
  • Personality tests revealed that unlucky people are generally much more tense than lucky people, and research has shown that anxiety disrupts people's ability to notice the unexpected.
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Linux: Linus Says, Linux Not Designed; It Never Was | KernelTrap

  • we humans have _never_ been able to replicate
    something more complicated than what we ourselves are, yet natural
    selection did it without even thinking.
  • The very architecture of UNIX has very much been an evolution.
  • 7 more annotations...
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