about me



< September 2013 >
1 2 3 4 5 6 7
8 91011121314

past articles »

Click for San Francisco, California Forecast

San Francisco, USA


Americans Cup Final

Congratulations to Oracle Team USA for defeating Team New Zealand is the American's Cup Final! Who would have though the could come back from the insurmountable 8-1 lost last week and win 8 races in a row to retain the title. Even the nature has intervene. If the wind would blow a little bit harder the Kiwi would have easily sails past the finish line and taken the trophy home last week. Instead the that race got canceled and they see the victory slip through the finger.

americans cup final

It was a great show this summer. It is exciting to see the iconic boat sailing around the bay. I hope to see them come back to San Francisco in next American's Cup.



What Ageism?

The assumption of ageism in Silicon Valley, that is as people in the technical field gets older, their capability decline relative to young people, making them less competitive in the job market, seems to be rather prevalent. As an middle age programmer myself, I find this notion very wrong. The knowledge and capacity for older people to learn are seriously underestimated. Specifically I repost my response to an article in IEEE Spectrum rebut the concept of half-life of knowledge

I am rather skeptic about the model of "half-life of knowledge". The idea is some knowledge expires after a period. It becomes useless. The effort in acquiring the knowledge will be nullified after the expiry date. This manifest into the phenomenon that old engineer becomes less desirable than young engineer. The author assume this model is self evident and has not bother to provide much evidence to back it up. I would say the burden of the prove is on the author. I am not convinced that "half-life of knowledge" model really explains the reality.
First consider mathematics. Most of the mathematics knowledge we use are well over 100 years old. I don't see any evidenced that mathematics knowledge are expiring. Arithmetics is the same. Calculus is still useful. Logic hasn't changed. I don't believe people can be exceptional engineers without mastering these 'old' math.
Being a software person, I consider algorithm and data structure foundational. Again I see no evidence of them being irrelevant. To program HTML DOM, you need to understand the data structure of 'tree', how it is structured and how to address and traverse them. To process big data, it is not enough to setup a Hadoop cluster. You need to understand the concept of computational complexity and why no amount of hardware can be fast enough if you problem's complexity grow at a rate of O(n^2). Again I see no evidence of these foundational knowledge are expired. Rather I think the have become more relevant ever.
What about software? The Unix system that power so many devices today is four decades old. The BASH scripting I wish it would dies because it is so antique and cryptic. Instead we are still building new software with BASH these days. Some work horse programming language, like Java, is a 'young' programming language only about 20 years old. But it is merely a descendant from the older languages like C and C++, which in turned come from the similar programming paradigm that date back to the early days of computing.
I find the "half-life of knowledge" model dubious. It is true applications change rapidly. But these change are only superficial. New knowledge are build on top of old knowledge, not replacing them. Foundational knowledge are as relevant as ever. They are not expiring anytime soon.

Turn out one of the best repudiation is in a question and answer in Quora. A poster asked, in a blunt language, for What do people in Silicon Valley plan to do once they hit 35 and are officially over the hill?

The presumption is so patently wrong that it draws a long list Silicon Valley luminaries to directly contradict the poster by recounting their own mid-career progress and achievement. Their evidence are overwhelming. To portrait Silicon Valley as young people's playground is just delusional.



Off The Grid At Presidio

Hang Hang
American's Cup

Another wonderful Sunday at the Off The Grid picnic at Presidio. We played Frisbee in the great lawn. And we caught two more races of the American's cup from the there.



American's Cup

American Cup

The American's Cup final has a weekday match today. Turn out our office afford a view between the high rise buildings toward the east end of the course. At this spot the boats, after racing downwind at high speed, turn around and head back upwind to the west. There are quite a bit of actions to be seen.

Unfortunately the defending champion Oracle team has once again beaten hands down by the challenger Emirate team, further diminishing their chance to retain the title.



past articles »


BBC News


Coronavirus: New Covid-19 cases rising rapidly across US (19 Oct 2020)


The Countdown: Early voting, Biden's ads and the Beastie Boys (19 Oct 2020)


Coronavirus: Belgium facing 'tsunami' of new infections (19 Oct 2020)


France teacher attack: Four school students held over beheading (19 Oct 2020)


Covid: Midday deadline for Greater Manchester coronavirus deal (19 Oct 2020)


Tokyo Olympics: Russian hackers targeted Games, UK says (19 Oct 2020)


Coronavirus: Germany improves ventilation to chase away Covid (19 Oct 2020)


Bolivia election: Evo Morales' ally Luis Arce set for win (19 Oct 2020)


Thailand protests: Authorities move to ban Telegram messaging app (19 Oct 2020)


Could cold water hold a clue to a dementia cure? (19 Oct 2020)

more »


SF Gate


Ship traffic, October 20 (19 Oct 2020)


Ship traffic, October 19 (16 Oct 2020)


Ship traffic, October 18 (16 Oct 2020)


Ship traffic, October 17 (16 Oct 2020)


Ship traffic, October 16 (15 Oct 2020)


Ship traffic, October 15 (14 Oct 2020)

more »

Site feed Updated: 2020-Oct-19 15:00