What time do people rent share bikes in San Jose? Houston and a group of data scientists has looked at bike share data in California and made some curious obvservations at our April unhackathon.

We also heard from Nick Lam-wai who is building a database on Hong Kong’s budget, the blueprint of government spending and priorities. And Chris Choy, who was working with Nick also discovered how to take historical PDFs of the budget and read the tables into Nick’s database. Expect big things from this group.

Our second meet up at Accellerate in Sheung Wan started with a discussion of theĀ  Catboost library by Daniil Chepenko, who explains its benefits over other methods such as random forest.

Catboost is a gradient boosting library for work on decision trees, developed by the Russian search engine Yandex, building on many years of development in this field.

See his presentation video below, and follow the slides here.

[youtube https://www.youtube.com/watch?v=TO7OZ-lRL9o&w=560&h=315]


Willis sought to find out what makes a Kickstarter project work. He came to the hackathon with data from 2009-2017, and a trained model with 60% accuracy, up from 30% at the beginning of his work. Knowing whether a Kickstarter will succeed is a huge investment advantage, so watch the short videos to see how well he went.


[youtube https://www.youtube.com/watch?v=oMUBwsHgaek&w=560&h=315]


[youtube https://www.youtube.com/watch?v=AO6L0FTDDwY&w=560&h=315]

Elizabeth Briel and Ben Davis have been seeking new ways to tell the story of global warming’s effects on arctic sea ice, and came to the hackathon with data they wanted to turn into a song. See the results below.

Slides are here.


[youtube https://www.youtube.com/watch?v=OAH8VQcYQYg&w=560&h=315]


[youtube https://www.youtube.com/watch?v=9X5dEPxB4uE&w=560&h=315]

Nick Lam-wai created a thorough database of the Hong Kong budget, turning it from a human readable collection of documents back into one ready for machine analysis.

Slides here.


[youtube https://www.youtube.com/watch?v=2XpwZrVShMo&w=560&h=315]


[youtube https://www.youtube.com/watch?v=lwP194doJi4&w=560&h=315]

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