jaltekruse

15 ms·

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by jaltekruse 9y ago
For better or for worse, tech is being forced into classrooms by textbook companies. At least this project emphasizes students working on good old complete assignments, rather than tiny bite-sized activities. It is also free, rather than $1
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by jaltekruse 9y ago
I also want to assume good faith, but some people in education are far more skeptical. I have been in meetings where those in charge or enforcing policy said things like "officially we have to have logins for each student", when a
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by jaltekruse 9y ago
I totally think this would be a good container format for these various interactive tools. I think one of the reasons why they are not daily tools for many classes is that so much of math is symbolic. So far symbolic math has been confined
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by jaltekruse 9y ago
Sorry, I forgot to mark the repo as public. Should be fixed now. The project is a bit messy, I still need to set up proper dependency management and a build system. For now the app all lives in the index.html file.
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by jaltekruse 9y ago
Thanks! Definitely one of the hardest things to do getting products into a school is having them approved for support by IT. This doesn't apply to websites, unless they need to manage logins. While there would be some workflow optimiza
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Show HN: Free Math, an offline React app for managing digital math homework(freemathapp.org)
138 points by jaltekruse 9y ago|35 comments
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by jaltekruse 9y ago
Wouldn't it make more sense to compare the value of all of the bitcoins to the total assets under management of the large banks? Many of them manage over a trillion in assets. Bitcoin is designed to be a replacement for bank accounts a
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by jaltekruse 9y ago
I don't think it is fair to say the code quality is low. There are a lot of complex concepts in the optimizer and the community is always working to add tooling and documentation to make it easier for newer developers. There are some o
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by jaltekruse 9y ago
If you want to take part in a community effort to fix this problem, consider contributing the to Apache Calcite project. It has relational algebra that spans across many different databases and dialects, including NoSQL databases like Mongo
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by jaltekruse 9y ago
A standard way to at least represent common data types, dates/times, integers/longs and fixed precision decimal would be nice. I know that the JSON format doesn't specify any limit or precision limitations on the size of nume
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Apple ordered to pay UW Madison WARF $506 mil for patent infringement(reuters.com)
2 points by jaltekruse 9y ago|0 comments
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by jaltekruse 9y ago
Interesting combination of features, MPP query engine, but unlike the rest of the projects around Hadoop they can push down queries where data sits instead of requiring a bulk copy to HDFS first. This is a real pain point for modern analyti
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by jaltekruse 9y ago
You might want to check out these two projects: https://github.com/learningequality/ka-lite https://github.com/learningequality/kolibri I'm not associated with either, I just heard about them
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by jaltekruse 10y ago
@linux-modder would be great to exchange ideas. I see a public key on your profile but no e-mail. Feel free to send me a message at the address listed on my project homepage. developers AT opennotebookmath DOT com
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by jaltekruse 10y ago
Open Notebook is an application for helping math teachers create content for their classes. It is designed to be extremely easy for non-technical users to pick up in just a few minutes. The application allows creating documents for print, o
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by jaltekruse 10y ago
Thanks! I just pushed a commit to fix it. I actually destabilized it a little when I refactored to start writing unit tests. I won't be publishing a new binary right away, but it should be soon. Also working on a cert to avoid the unkn
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by jaltekruse 10y ago
Video Demo: https://www.youtube.com/watch?v=EnBE76kY2cw
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by jaltekruse 10y ago
Thank you for the kinds words, I did try to put a lot of thought into the feature set to make it useful. I have seen a number of tools that are similar, one way I wanted to set this project apart was with a simple interface that even non-te
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by jaltekruse 10y ago
Thanks for trying it out! We are working on integrating the software with Moodle and other course management systems so that I don't have to force schools to adopt a new service grade the assignments.
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by jaltekruse 10y ago
Hello all, as it's a show HN post it's kind of implied, but I am the author of the project. Please feel free to leave feedback or ask questions here. Thanks so much for checking out the project, be sure to share it on your social
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Show HN: Open Notebook – Software for creating digital math worksheets(jaltekruse.github.io)
50 points by jaltekruse 10y ago|10 comments
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by jaltekruse 11y ago
I only took a brief look over the code to try to find what documentation is actually there, but I managed to find this https://github.com/redox-os/redox/blob/master/kernel/fs/url.... On your qu
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by jaltekruse 11y ago
Exactly this, the most basic example is an operation on a single column. If the data for a single column is mixed in with other data in a row-oriented layout, you are going to have to bring a new chunk of memory into the CPU cache sooner to
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by jaltekruse 11y ago
Parquet is designed specifically to store large amounts of data efficiently on disk. As such it defaults to compressing and encoding data to save space. Arrow is designed for immediate consumption without any materialization into a differen
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by jaltekruse 11y ago
We are just using the site as set up by the Apache Infrastructure team. I'll file a ticket to see if they can add the clone URL there. Here is a page with the clone URLs: https://git.apache.org/
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by jaltekruse 11y ago
To be fair this isn't the best UI for git. We were waiting for the mirror to Github to be set up, so we decided to just include the link to the Apache git repo UI to be safe the link was live when the press announcements went out. The
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by jaltekruse 11y ago
Disclosure I am a committer on Apache Drill and Apache Arrow. This isn't actually true. The java implementation has been complete and used in Apache Drill, a distributed SQL engine, for the past few years. While we anticipate a few sma
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White mana cards are cheap and stupid: Querying every Magic card ever made(dremio.com)
7 points by jaltekruse 11y ago|0 comments
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by jaltekruse 11y ago
Drill uses standards compliant SQL for flat data. To work with all of the non-relational stores Drill supports complex types like maps and lists. The syntax for working with this complex data is the same javascript, i.e. a.b.c[3], so this i
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by jaltekruse 11y ago
Disclosure, I am a Drill committer. If you are looking for an open source technology to meet this need, Apache Drill is a distributed SQL engine that can talk to multiple datasources and make them available in a single namespace. Joins acro

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