Sending Bitcoin programmatically using BlockCypher API

Posted on by yohanes.gultom@gmail.com

BlockCypher provides convenient REST APIs to send cryptocurrency like Bitcoin easily. Here are two APIs that we can use to send Bitcoin from one address to another: 1. Build transaction skeleton https://api.blockcypher.com/v1/btc/test3/txs/new 2. Push signed transaction https://api.blockcypher.com/v1/btc/test3/txs/send Here are the step by steps of using those APIs in JavaScript (Node.js) in testnet3 Bitcoin network. First,… Read More

Deploying Laravel 5.4 project in shared-hosting with no SSH

Posted on by yohanes.gultom@gmail.com

Despite lack of compact guides in the internet, deploying Laravel 5.4 project in cheap shared hosting (with no SSH support) is actually quite simple. The steps are: 1.  Import database to the shared hosting’s database using available tool such as phpMyAdmin 2. Upload the content of public directory in your Laravel project to public area… Read More

Training NER model using Stanford Core NLP CRF Classifier

Posted on by yohanes.gultom@gmail.com

Named-Entity Recognition (NER) is one of the most popular NLP tasks. It’s popular because it produces annotation result that can be used directly (eg. extracting people name from text) or indirectly (eg. extracting feature for classification task). One of the easiest way to do it is by downloading and using latest Stanford Core NLP suite… Read More

Understanding LeNet (LeCun, 1998)

Posted on by yohanes.gultom@gmail.com

As an attempt to understand Convolutional Neural Network (CNN/ConvNet) better, I was suggested to read the section about LeNet5 in the original paper and figure out where every numbers come from ? Input layer The input of this neural network is an image of size 32*32 pixels where each pixels are represented by an input… Read More