Battery University

A great resource for all things related to rechargeable batteries.

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The life and times of a HealthVault piece of data…

HealthVault has two temporarl views of data. The first temporal view is fairly obvious. If, for example, you’re looking at the Height type, there is a When property that can tell the time at which the height was measured. That allows you to do fun things, like chart the growth of your children over time (as…

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Ring of Fire – Simulator

To make some progress before my parts arrive (they showed up yesterday), and to have a good way to test my animations, I decided to build a simulator. The simulator is build in windows forms, and is intended to prototype both the approach I’m going to take in the real software. I’m also hoping I…

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Ring of Fire

No, not that… Some of you may know of my devotion to holiday lighting, and I’ve been spending a few months thinking about this year’s display. Last year’s windstorm did a number on a few of the displays, but most were fixable (the spiral tree that took flight was not…). I wanted to build something…

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Storing CCR and CCD data in HealthVault

There have been a couple of questions recently about storing CCR and CCD data in HealthVault, so I decided to do a quick sample. The sample will show up in the SDK sometime in the future, so consider this the accompanying discussion for the sample. If you want the actual bits before they show up…

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The physics of rock guitar…

I wish I had a PhD in guitar acoustics… The physics of rock guitar…

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Psychic debugging…

Ray wrote a post entitled “Psychic Debuggin: IP on heap“, where he talks about somebody being amazed at his abilities to debug something immediately. Which brought something to mind (which I hope I haven’t written about before (I did a quick search and didn’t find anything )) Perhaps 4 or 5 times, I’ve come across…

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Request-Response Tracing (low-level debugging)

If you want to do some low level debugging of the traffic between your application and the HealthVault servers, the following may be useful. Note that there’s a lot of raw-xml there… Steps 1.       Make sure the account under which the ASP.NET worker process is running (w3wp.exe for W2K3 and Vista, aspnet_wp.exe for XP) has…

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Extending HealthVault data types using a custom extension class

This post will cover the second method of extending a HealthVault data type. If you haven’t read about the first method, please do so now. We’ll wait. In the first method, we had to deal with all the XML details ourselves, which made it a bit clumsy. This time, we’ll encapsulate it in a class:…

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Extending HealthVault data types using HealthRecordItemExtension

So, let’s say that you’re building an application using the HealthVault Height type, and you find that you need to store another bit of information with that type. What should you do? Well, first, you should probably stop by HealthVault Forum and say, “I’m using Height, and I want to keep track of whether people were sleeping right…

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