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alexcnwy

785 karma · joined May 14, 2017

Co-founder / CTO AiSupervision (YC W22)

YC Badge: 0x0c51bf0090235f2604af81df021023a3d62aa4d3

E: alex [@@@] numberboost.com

L: linkedin.com/in/alxcnwy/

X: @alxcnwy

Consulting: www.numberboost.com

Here is a vid of one my talks on deep learning for computer vision: https://www.youtube.com/watch?v=X4Q6C915sUY

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submissionscomments
alexcnwy··on Show HN: I made a neural net that analyzes privacy policies
Great work - would love to read your thesis if it’s available online?
alexcnwy··on The effect of meditation on brain structure (2012)
I did a 10 day retreat after burning out working at a hedge fund and I can highly highly recommend it.

I must warn that it’s not easy. I thought a meditation retreat would be a great way to unplug and take it easy but the schedule is intense and meditating that much requires great energy and focus.

Highly recommended but know what you’re getting into :)

alexcnwy
·
·on Salesforce releases language model bigger than GPT-2 large
Following the Twitter thread, keep up the great work Max!
alexcnwy··on DEF CON 2019 – CTF Retrospective
Really interesting write-up!

There was a great podcast about PPP on Darknet Diaries a few weeks ago - their relentlessness and persistence is so inspiring: https://darknetdiaries.com/episode/43/

alexcnwy··on Former student destroys 59 university computers using USB Killer device
good question! I have wondered about this when plugging my phone in and being asked “do you trust this computer?”
alexcnwy··on YOLO: Real-Time Object Detection
yeah it’s easy to fix those with a filter on the predictions. could use bayesian approach or just smooth using a majority vote over rolling window of say 3 frames...
alexcnwy··on Working for a startup makes less sense, unless you are into the mission
experience earned IS a financial investment because it increases your future earning power.

whether the increase in the expected present value of your future earnings justifies the present-day lower salary is a question of magnitudes and probabilities

alexcnwy··on Morphin instantly grafts your face into GIFs
so cool!

i think this kind of thing getting more realistic is a backdoor way to get governments to pay attention to verifiable identity.

what’s to stop someone from making a video of the CEO of a public company announcing bad news while shorting the stock?

alexcnwy··on Zoom S-1
I think you’re right - it’s just surprising that 50 years after humankind put someone on the moon (allegedly lol) we still can’t get video conferencing right.

I know it’s a hard problem but is it really that hard?

alexcnwy··on Zoom S-1
I understand that and perhaps it justifies the valuation but it blows my mind that in 2019 there isn’t an open source solution that works just as well (or better - again, Zoom is buggy) and is easy to deploy and control yoursef.

I know the same could be said for many public companies but that doesn’t change my feeling that they many of them are overvalued and overrated.

alexcnwy··on Zoom S-1
I haven’t but I recently used their video conferencing software on calls with 40+ people and it was really buggy.

All of those things sound great and important but there are many competitors who also do those and again, the switching costs for the user are low.

Meeting room support and scheduling integration don’t sound like they justify the massive valuation but I’m totally open to the possibility that I just don’t “get it”.

alexcnwy··on So you want your app/website to work in China
what do you mean?
alexcnwy··on Zoom S-1
blows my mind that video conferencing software with such low switching costs can be worth so much.
alexcnwy··on So you want your app/website to work in China
That only works with a small number of transmitters. If Samsung or Apple released a phone with native satellite default support, it would be impossible to police.

Censorship is doomed.

alexcnwy··on So you want your app/website to work in China
when everyone has one
alexcnwy··on So you want your app/website to work in China
how do you imagine they would police it?
alexcnwy··on So you want your app/website to work in China
the internet will become impossible to censor (for everyone - it’s already easy for the rich to avoid censorship) when satellite connections become cheaper / faster / more accessible
alexcnwy··on Ask HN: Makes sense to do Masters in Computer Science after 13 years experience?
Do it if you are so passionate about the topic that you’re teaching yourself anyway but need to set aside a chunk of time to really get the momentum you want. Don’t do it if you’re hoping it will pull you out of a rut (there will be lots of boring courses and admin).

Personally I found doing a MSc in Statistics after 3 years of working to be incredibly valuable. I think part of it was it gave me permission to view myself as an expert (although you don’t really need a MSc to do that as you can tell by switching on the news lol)

alexcnwy··on Ask HN: Seemingly unable to recover from burnout. Please advise
I found a combination of these Ayurvedic herbal supplements taken in the morning before food to be beneficial (do your own research / I am not a doctor / etc): 1. Ashwagandha 2. Gotu Kola 3. Bacopa

I’d also recommend considering a micro vacation to somewhere with a spa and just relax in some hot springs for a couple days.

Also exercise!

alexcnwy··on What Working at Stripe Has Been Like
For example good luck getting mayonnaise with your fries at any of the fast food chains here. They have mayonnaise and they put it on burgers but they “CANNOT” give (or sell) it to you in a separate container for your fries.
alexcnwy··on What Working at Stripe Has Been Like
I’m in Tokyo right now for work (my startup NumberBoost won an innovation competition with NTT Japan) and it’s so wild how simultaneously forward and backward things are here.

On the one hand, there are so many things they do here that make me feel like they’re in the future. On the other hand, every fifth person has a flip phone, the WiFi sucks, you can’t buy a travel SIM card at the mall, and there are CD/DVD stores everywhere.

I can’t help but feel part of their problem is how unwilling most local Japanese people I’ve met here are to break the rules.

alexcnwy··on Ask HN: What is the best “dumb” phone?
I’m in Tokyo for work and it is surprising how many flip phones there still are here. Not sure if they work in the US but might be worth looking into shipping from Japan.
alexcnwy··on Alex Gibney on the Fall of Theranos and Elizabeth Holmes
It’s more tax efficient too.

Genuinely not sure why people are downvoting you.

alexcnwy··on Facebook failed to block 20% of uploaded New Zealand shooter videos
I build a lot of computer vision systems and did my MSc on classifying what’s happening in video and I am VERY skeptical that it’s possible to prevent this from happening (without having a person watch every video).

You can edit a video to make it appear as safe content and it’s a cat and mouse game because you need humans to annotate those variations before a ML system can detect them (an unsupervised model will likely lead to loads of false positives).

I think the solution is better control over what we see and who we trust enough to allow them to broadcast into our brains.

alexcnwy··on Facial recognition's 'dirty little secret': Millions of online photos scraped
I agree it could cause harm but I’m interested in what harm you think such technologies could cause?
alexcnwy··on Facial recognition's 'dirty little secret': Millions of online photos scraped
This brings up a very interesting and important question around differential privacy.

If I scrape millions of photos from Facebook (including yours) then train a differentially private model that can extract features from a new face, is that a privacy violation?

A differentially private model is one in which you cannot identify the inclusion of any single datapoint which means you cannot tell the difference between a model trained on the dataset and the same model trained the same dataset with the addition of your one datapoint.

You might argue it’s a privacy violation because the scraping process might involve people looking at your images but if that was fully automated and nobody ever looked at your images - the model can be trained then the data inmediately deleted...

alexcnwy··on Principal component analysis: pictures, code and proofs (2018)
I found this explanation extremely helpful when I did PCA in my postgrad multivariate analysis course:

http://setosa.io/ev/principal-component-analysis/

alexcnwy··on Ask HN: How to speak like a leader, not like an engineer?
Haha yeah I felt the same weird cult-like vibe.

The thing about table-topics is you can't simulate it. People think they can do it until they get up in front of an audience of strangers. It's like that Mike Tyson quote: "everyone has a plan until they get punthed in the face" (couldn't resist)

alexcnwy··on If Lyft can't keep its drivers as contractors, it may never be profitable
Is it possible that all the uber-style transport in a single city could be self-driving in the next 10 years? What would you say the probability of this happening would be?
alexcnwy··on If Lyft can't keep its drivers as contractors, it may never be profitable
Market share and data. I actually think the market share angle is far less important because the switching costs from the perspective of the rider are very low.
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