Hacker News Reader

shazelineon Plane crashes, overturns during landing at Toronto airport

It was gusting at 33kts.

33kt/hr * 1.15mi/kt * 1.609km/mi ~= 61km/hr.

The weather app was right. Just different units.

There was an interesting problem about qanats and excavation cost minimization in the 2015 ICPC World Finals problem set.

(Problem H) https://icpc.baylor.edu/worldfinals/problems/icpc2015.pdf

shazelineon Show HN: A Machine Learning Model for Salary Estimation

You can probably get away with undergraduate degree graduation year as a rough proxy for age.

age(grad_year) ~= (2016 - grad_year) + 22

shazelineon Bootstrap 4 alpha

  <!-- open graph bullshit -->

Line 22: view-source:http://themes.getbootstrap.com/products/application

shazelineon Deep learning

You generally don't know if you've reached a suitable maxima, which is why it is good to run a nondeterministic optimizer a few times (if computation power allows) and see if there are any reliable parameters form there.

There are also somewhat better-than-random strategies such as Bayesian optimization and particle swarm optimization that can help you to search more efficiently.

shazelineon Postgres CLI with autocompletion and syntax highlighting

Cool! I think this project is really awesome and your blog is full of interesting things. Keep up the great work!

shazelineon Postgres CLI with autocompletion and syntax highlighting

Is there any way to set tcpKeepAlive=true, ssl=true, and specify a sslrootcert (for Redshift use)?

shazelineon Top data mining algorithms in plain English

CART forms the basis of the decision trees used by scikit-learn's implementation of random forests [1]. CART may be old, but definitely not outdated.

[1] https://github.com/scikit-learn/scikit-learn/blob/master/skl...

shazelineon Lyft Raises $530M in Fight with Uber

I would argue that an increase in ride-sharing usage reduces traffic congestion.

shazelineon Show HN: Opinionated Dress Color Simulation

You're right. But it's already known that the actual dress is "blue and black" as someone found it on amazon. It's essentially the picture that is creating the ambiguity.

shazelineon Show HN: Opinionated Dress Color Simulation

I did some basic color analysis here.

http://shahidchohan.com/resolving-the-dress-color-debate/

shazelineon Replicating SQLite using Raft Consensus

I skimmed the source and didn't see anything regarding leader election. Am I missing something or is this implementation encapsulating some of the underlying terminology/analogies traditionally used by Raft?

shazelineon Introducing Streaming K-Means in Spark MLlib 1.2

One common approach is to look for the elbow in the curve <metric> vs K (number of clusters). This is essentially finding the number of clusters after which the rate of information gained/variance explained/<metric> slows. I believe it's possible to binary search for this point if you can assume the curve is convex.

shazelineon Students Gain Access to Files on Admission to Stanford

Current UCLA student. I just sent a request. Waiting to see what happens.

shazelineon Machine learning isn't Kaggle competitions

I think it is more accurate to say that data science isn't Kaggle. The process of taking a data set and fitting it to the most robust model is certainly machine learning.

shazelineon Analysis of Over 2,000 Computer Science Professors at Top Universities

I wrote a quick script to generate a list similar to (but not as deep or well-annotated as) Prof Palsberg's.

https://gist.github.com/shazeline/d9881d06be31a59a93d3

It's a BFS for Google Scholar seeded with Herbert Simon.

shazelineon Show HN: Postman – A command-line utility for batch-sending email

postmaster

shazelineon Show HN: March Madness for Hackers

Yeah, trg2 would need to put all the edge case rules towards the beginning. That, or just put the basic rules at the beginning and have separate conditionals at the end to handle the edge cases.