Ning Wang

4.4K posts

Ning Wang banner
Ning Wang

Ning Wang

@ning_sf

C'est la vie. I love #firefly. data pipeline engineer at Amplitude analytics, previously Twitter, Google And the game industry. committer/ppmc of Apache Heron.

Bay area Katılım Eylül 2013
538 Takip Edilen391 Takipçiler
Aakash Gupta
Aakash Gupta@aakashgupta·
BART spent $90 million on new fare gates. They're recovering about $10 million a year in fares. That's a 9-year payback on paper. The actual return hit in six months. Embarcadero station went from 112 hours of corrective maintenance in the six months before installation to 2 hours after. Daly City saved 109. Balboa Park saved 75. Across the system, 961 hours of cleanup work disappeared. Corrective maintenance is the term BART uses for graffiti, heavy soiling, vandalism, the damage that needs a crew not a janitor. At several stations it dropped to zero. Crime fell 41% year over year. Riders who reported seeing fare evasion on their trip dropped from 22% to 10%. Citations issued by BART police went from 2,200 in January to under 1,000 in July, because there was nothing to cite. The gates were a filtering project disguised as a revenue project. Old BART gates were waist-high orange fins designed in the 1970s. You could hop them in under a second. That made the station effectively a public space, and the rider mix reflected that. The new gates are 72 inches of polycarbonate with 3D sensors that detect tailgating. You either pay or you don't enter. Once you don't enter, you also don't smoke on the platform, sleep in the elevator, or harass other riders. BART tried hiring more police for years. Blitz operations at high-traffic stations. Increased patrols. Dedicated transit cops. None of it moved the numbers the way six feet of polycarbonate did. The $10 million in recovered fares is the smallest line in the return. Fare revenue used to cover 70% of BART operations. After the pandemic it collapsed to 22%. The gates won't fix that gap directly. They fix the precondition for fixing it: a system that office workers, families, and tourists are willing to use again. Ridership growth at stations with new gates outpaced ungated ones before the rollout finished. A $400 million annual deficit is heading to voters in November as a sales tax measure. Voters don't approve sales taxes for transit agencies they don't feel safe in. The $90 million on gates is buying BART the right to ask the public for more money. That's the real return on six feet of polycarbonate.
Aakash Gupta tweet mediaAakash Gupta tweet media
English
291
798
9.2K
2.4M
Ning Wang
Ning Wang@ning_sf·
Another year
Ning Wang tweet media
English
0
0
2
32
Ning Wang
Ning Wang@ning_sf·
Bee swarming
Ning Wang tweet mediaNing Wang tweet media
English
0
0
1
97
BART Alert
BART Alert@SFBARTalert·
There is no Green Line service. SF bound riders can take an Orange/Richmond train and transfer to a Blue/Daly City train. East Bay bound riders take a Blue/Dublin train and transfer to an Orange/Berryessa train.
English
2
3
5
5K
Ning Wang retweetledi
Spenser Skates
Spenser Skates@spenserskates·
Al has collapsed the time it takes to ship a feature. Now it's all about shipping the right thing. It's just as hard as it ever was. As coding gets automated, agentic analytics becomes the bottleneck. Teams that win will build within context rich environments that capture user behavior and customer feedback, making that data accessible to both builders and agents. Today @Amplitude_HQ is launching our Al Analytics Platform with Agents and MCP. Autonomous analytics that helps builders and coding agents ship products that their customers actually want. Just as our partner @claudeai has reinvented software, Amplitude is reinventing analytics for the Al age. We have achieved 76% accuracy for complex production grade queries and agentic usage has grown 10x in 3 months. Don't just build fast, build what's right. Try it for free, today.
English
111
328
2.9K
320.9K
Ning Wang retweetledi
Spenser Skates
Spenser Skates@spenserskates·
Today we're launching Amplitude AI Visibility 1.5 FOR FREE, which includes: -WoW reporting -Competitor insights -Relevancy score -Report history -Content generation capabilities -Prompt generation improvements -AI chat web traffic analysis -Major performance and reliability improvements and more SEO isn't how customers discover brands anymore. LLMs are. Your company is being judged based on how you appear in @ChatGPTapp, @claudeai, and @GeminiApp. If you don't have visibility into that, you’re losing business. @Amplitude_HQ
Spenser Skates tweet mediaSpenser Skates tweet mediaSpenser Skates tweet mediaSpenser Skates tweet media
English
18
31
84
175.1K
Ning Wang retweetledi
Spenser Skates
Spenser Skates@spenserskates·
Amplitude is now listed as an official MCP partner for Claude: claude.com/partners/mcp Try us out! We're moving up in the AI world Got that start of alphabet positioning too
Spenser Skates tweet media
English
10
8
85
17.1K
Ning Wang
Ning Wang@ning_sf·
Where am I?
Ning Wang tweet media
English
0
0
0
103
Ning Wang
Ning Wang@ning_sf·
Not sure if there will be next year
Ning Wang tweet media
English
0
0
0
129
Ning Wang
Ning Wang@ning_sf·
California income tax increased this year! Where the fk does all the money go?
Oakland, CA 🇺🇸 English
0
0
1
151
High Yield Harry
High Yield Harry@HighyieldHarry·
If you looked at this photo, with zero context, what would you think this is?
High Yield Harry tweet media
English
19.6K
716
18K
3.5M
Bev Harris
Bev Harris@BevHarrisWrites·
@BehizyTweets I always wondered why interest on home mortgages was deductible but not car payments. Both are major investments and the car is probably even more necessary than owning a home.
English
70
5
305
35.7K
George
George@BehizyTweets·
BREAKING: Trump just announced that he will make interest payments on car loans FULLY tax deductible for all Americans "This will stimulate massive domestic auto production and make car ownership dramatically more affordable for millions and millions of working American families." It doesn't seem like Trump will ever run out of good policies anytime soon.
English
1.9K
7.1K
37K
1.8M
Ning Wang
Ning Wang@ning_sf·
And here it is!
Ning Wang tweet media
San Ramon, CA 🇺🇸 English
0
0
1
110
Ning Wang
Ning Wang@ning_sf·
Waiting for my first vote!
Ning Wang tweet media
San Ramon, CA 🇺🇸 English
1
0
1
189
JD Vance
JD Vance@JDVance·
"You've got a tough job here. You've got to pretend that Donald Trump didn't deliver rising take home pay, which of course he did. You've got to pretend that Donald Trump didn't deliver lower inflation, which of course he did. And then you've got to defend Kamala Harris's atrocious economic record, which has made gas, groceries, and housing unaffordable for American citizens." - Senator JD Vance
English
8.3K
44.9K
276K
9.9M