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Archive for 2017

Density estimation

Density estimation

Being able to measure the degree of randomness (or of our ignorance) on a bunch of values is a critical tool for data science. In this post we explain the basics and how we are applying this to grab early insights from electricity consumption data.
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A/C Temperature Settings for Efficiency and Comfort

A/C Temperature Settings for Efficiency and Comfort

We go through settings for your heating and cooling to optimise both occupancy comfort and energy efficiency, while considering the different variables involved.
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Hours of operation and the Gibb's phenomenon

Hours of operation and the Gibb's phenomenon

There are many ways to extract insights out of time series data. In this series of posts we explore some of the mathematical foundations in dealing with an apparently simple but, we will see, challenging task: based on the power electricity profile of a business, determine its hours of operation.
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Lambda Management and Deployment

Lambda Management and Deployment

AWS Lambda, the new kid on the block, is an interesting technology. What's harder is developing and deploying lambda functions using CI/CD tooling – thus making it easier to manage, update, test and deploy the functions. We explore how we've started meeting this challenge.
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Using mutant + snapshot testing to prevent regressions in D3 visualisations

Using mutant + snapshot testing to prevent regressions in D3 visualisations

D3 is a solid data visualisation tool but writing tests for charts can be tricky due to the way D3 chains function calls together and the sheer amount of code that's involved in bootstrapping a chart. Snapshot testing is a low effort, high reward testing approach popularised by the Jest framework for testing React apps. I've had a go at using it with D3 charts and found it works well with some caveats.
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Creating new chart types in NVD3

Creating new chart types in NVD3

COzero needed some new charts built for our energy management system, EnergyLink. We created two new open source NVD3 models: differenceChart and lineWithFocusPlusSecondaryChart
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2017 Internship Update - Month 3

2017 Internship Update - Month 3

Last Week at COzero
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Linting Polymer apps

Linting Polymer apps

Polymer is an appealing framework for building web apps but due to the way Web Components work, it doesn't play nicely with out of the box configuration for linting tools like ESLint/CSSLint. We've come up with an approach for linting that seems to work well using eslint-plugin-html and StyleLint.
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2017 Internship Update - Month 2

2017 Internship Update - Month 2

We're two months into the internship and work is still as interesting as ever!
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Power Quality - Power Factor Correction

Power Quality - Power Factor Correction

Are you considering a power factor correction unit, but would like to know more? We'll cover power factor basics and then provide some recommendations to help you decide as well as some maintenance and troubleshooting advice for your unit.
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Power Quality - Power Factor

Power Quality - Power Factor

Interested to learn more about power factor, or thinking about a power factor correction unit? We go into what power factor is, why and when it's important, and how to view your site's power factor.
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Executing Lead Generation using AWS-API and Lambda

Executing Lead Generation using AWS-API and Lambda

AWS lambda makes it possible to track new and old visitors to the webpage. This can be used to receive their information and use them as possible leads.
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