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November 2007 - Posts

Battery University

A great resource for all things related to rechargeable batteries .
Posted by ericgu | 0 Comments

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,
Posted by ericgu | 1 Comments
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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
Posted by ericgu | 2 Comments

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
Posted by ericgu | 7 Comments

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
Posted by ericgu | 1 Comments
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The physics of rock guitar...

I wish I had a PhD in guitar acoustics... The physics of rock guitar ...
Posted by ericgu | 1 Comments

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
Posted by ericgu | 4 Comments

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
Posted by ericgu | 1 Comments

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.
Posted by ericgu | 1 Comments
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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,
Posted by ericgu | 4 Comments
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Happy Birthday!

30 years. 30 years ago - give or take a few days - Digital Equipment Corporation introduced the VAX 11-780, running their brand new VMS operating system. That's "VAX' as in "Virtual Address eXtension" and VMS as "Virtual Memory System". "Virtual" as in
Posted by ericgu | 1 Comments

Deep Breath...

An unexpected vacation. Here's why ...
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Second use, third use

A few days ago, I got a link to a post on Software Performance , which touches on a specific topic that is of interest to me. I use a lot of products that spend time trying to optimize the "first use" case, so it's a straightforward as possible. Which
Posted by ericgu | 2 Comments

Prepare for liftoff...

Last year, I came into work to find my main desktop machine off. Now, this machine had been misbehavin' for the last few weeks, but this was a new behavior. I sat down, pressed the power button, and sat back as I listened to the disks spool up, and the
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