Statistics

By , August 9, 2011 6:52 pm

This is a true story.

University X does not require GMAT for its graduate business programs. Obviously, no applicant bothered taking the GMAT.

One student who had GMAT 780 (over 800) applied and got admitted.

The school published its average GMAT intake 780, 9.24% higher than that of Wharton.

Does normal distribution assumption hold?

By , August 9, 2011 6:52 pm

 

Kindle further boosts my concentration

By , August 9, 2011 6:51 pm

Edit

Kindle further boosts my concentration

by Tai Tran on Tuesday, November 9, 2010 at 9:44pm

Apart of informational noise, Kindle further eradicates these distractions:

  1. Effect of paper quality (and its variation) on my cognition
  2. Effect of font (and its variation) on my cognition. I aichmophobically loathe Times New Roman
  3. Effect of book weight (and its variation) on my cognition
  4. Effect of book thickness (and its variation) on my cognition
  5. Effect of book scent (and its variation) on my cognition

So I can rivet on what I need want: content.

Bad system design: Commonwealth Bank of Australia To Account number text field

By , August 9, 2011 6:50 pm

ANZ bank account number format 1234 5678<font color="#ff0000">9</font> (10 characters, with a space in between the 4th and 5th letters)

Commonwealth bank’s To account number text field accepts 9 characters

When one pastes the ANZ account number in, the last character is automatically truncated

Consequence: wrong account and the sender incurs $2.5 return fee

Good design should have taken this into account, for customer’s sake.

Amazon unrivalled customer service

By , August 9, 2011 6:49 pm

My friend ordered one Kindle 3, one lighted Kindle leather cover and one Kindle leather cover. The last one was for me.

DHL delivered the three in two packages to his house, but had no-one signed reception. The two covers were lost when his flat mate open the door.

He contacted Amazon using this link. Amazon shipped another two covers within a few hours.

Amazon Kindle 3 Leather Cover Review

By , August 9, 2011 6:49 pm

Link: http://www.amazon.com/gp/product/B003DZ167K/

The hinge is more fast-joint than I thought. The feeling is steady.

The leather is harsh handle, not silky smooth

The inside surface which contacts the screen is sleek enough

Product details are minimized, so less distraction when reading

I bought the Apple Green one. The shade is more darkish than actual green apples

In sum, I am happier with the official cover than I was with ones from eBay.

Blackberry Torch 9800 Review

By , August 9, 2011 6:48 pm

Photo Album: http://www.facebook.com/album.php?aid=243502&id=533516692&l=f790a9dd87

  1. Not as thick as I’d thought
  2. In between a business and a consumer phone
  3. Light is good
  4. Audio is good
  5. Why slider: larger screen. Large enough for web browsing
  6. Firm on hand
  7. QWERTY keyboard is slimmer than traditional phones (Bold), but still handy
  8. Battery life is awesome
  9. Photos album is like iPhone
  10. Trackpad is responsive
  11. Touch screen is sensitive
  12. Process speed is good for 624Mhz
  13. Virtual keyboard provided when physical keyboard is not slided out. Good for calling & quick responses
  14. Apps: LinkedIn app works fine. Facebook Mobile app uses Mobile Web is ok.
  15. These apps don’t work without 3G: RIM’s Facebook, RIM’s Twitter, RIM’s Yahoo! Messenger, RIM’s Gtalk, RIM’s Live Messenger
  16. No holster included inbox

Accessories

a21 Bluetooth Headset

a21 headset

It works and looks really nice. Comes with 3 different cover.

Case-Mate Barely There

Case-mate barely there

Black is good. Front is not fully fit. Front interferes with the Phone and Home buttons. Comes with a screen protector (I hadn’t known this otherwise I wouldn’t’ve ordered the screen protector). What I don’t like about case-mate is that the box of the cover is of so high quality.

Case-Mate anti-glare / anti-fingerprint screen protector

Case-mate screen protector

It’s actually anti-glare and anti-fingerprint. Not as good as authentic iPhone 4 screen protector. There were bubbles.

Decalgirl Skin

Decalgirl Skin

Color is blurry and looks like fading. Material feels cheap. Big disappointment.

Skinit Skin

Skinit Skin

Much better than Decalgirl. Pretty ok.

KR net Stylus

Stylus

Responsive. Soft head. A little short. The plug fits.

The tip should have been made with fine rubber.

Idea for displaying discussions on articles

By , August 9, 2011 6:48 pm

Current: comment display is chronically linear or threadedly linear

Issue: reader need to scroll up and down to follow if the discussion is based on a specific point in the article. Even with quotation in the comment, the quote is read without a context.

Idea:

  • Comments on specific sections are display on tooltip surrounding that area when reader interacts with that area (hover mouse / click)
  • Hotness is marked with different levels of color highlight

Technology: this may be easier to implement with apps than generic web

How Dell lost itself

By , August 9, 2011 6:47 pm

In 2007 I had the question why Dell was losing market share. I only manage to answer myself now.

1. Bad timing for a price war

In 2006, Dell engaged in a price war against Hewlett-Packard et al.

Wrong move.

The PC industry was diminishing and long-run revenue from potential market share gain couldn’t offset the loss.

Because the PC industry (in the US) was saturating, prices were affordable consumers were less sensitive about prices.

ex post, 2006 was the peak of the boom and consumers were even less sensitive about prices.

HP under Mark Hurd chose product differentiation, and won.

2. Change in consumer preference

Dell’s key strength has been mass customization of affordable and reliable machines. Consumers preference then shift to more personalized and fashionable products.

Addendum: http://thailehuy.tumblr.co​m/post/1625519791/where-de​ll-went-wrong

The game

By , August 9, 2011 6:47 pm

Poker is unlike trading in that:

  1. Poker rules are fixed and known; regulation and economic environment change, occasionally unpredictably
  2. Poker turns are fixed (clockwise / counter-clockwise) and linear (one hand after another); trades, economic movements and social movements evolve continually and nonlinearly
  3. There are no more than 10 poker players in one game; the number of traders and economic planners you trade with is… beyond my grasp
  4. In non-virtual poker games, players can see ALL participants; on trading floors, what traders see and hear are limited

So if you I suck in poker, well, good luck with trading.

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