### The Colarie: A new way of measuring calorie intake

Recommended daily energy intake for a man is generally considered to be roughly 2,500 Calories (or kilocalories: 1 Calorie = 1,000 calories) and for a woman it's 2,000. The problem with those figures is that they are rather abstract. If you are trying to count your energy intake it would be much easier to deal with something smaller and easier to understand.

Hence my idea for the Colarie.

1 Colarie is the number of Calories in a single can of non-diet Coca Cola. It's easy to appreciate that a single can of Coke isn't very good for you and so comparing a food stuff to a can of Coke is an easy measure of whether you are eating something that's got too much fat or sugar in it.

The actual Calorie count for a Coke can varies by country. In France there are 139 Calories in a can, in the US there are 155. So I've settled on 147 as a good measure. So 1 Colarie = 147 Calories.

That means a man needs to consume the equivalent of 17 cans of Coke per day; for a woman it's 13.5 cans of Coke per day. That isn't a recommended diet, however!

So next time you are faced with a snack bar, use the Colarie measure. Just the other day I was presented with a small biscuit to go with a cup of tea on a BA flight. Looking at the Calorie count it was around 230 Calories for this tiny biscuit. That's 1.5 Colaries!

I didn't eat it.

### How to write a successful blog post

First, a quick clarification of 'successful'. In this instance, I mean a blog post that receives a large number of page views. For my, little blog the most successful post ever got almost 57,000 page views. Not a lot by some other standards, but I was pretty happy about it. Looking at the top 10 blog posts (by page views) on my site, I've tried to distill some wisdom about what made them successful. Your blog posting mileage may vary. 1. Avoid using the passive voice The Microsoft Word grammar checker has probably been telling you this for years, but the passive voice excludes the people involved in your blog post. And that includes you, the author, and the reader. By using personal pronouns like I, you and we, you will include the reader in your blog post. When I first started this blog I avoid using "I" because I thought I was being narcissistic. But we all like to read about other people, people help anchor a story in reality. Without people your bl

### Your last name contains invalid characters

My last name is "Graham-Cumming". But here's a typical form response when I enter it: Does the web site have any idea how rude it is to claim that my last name contains invalid characters? Clearly not. What they actually meant is: our web site will not accept that hyphen in your last name. But do they say that? No, of course not. They decide to shove in my face the claim that there's something wrong with my name. There's nothing wrong with my name, just as there's nothing wrong with someone whose first name is Jean-Marie, or someone whose last name is O'Reilly. What is wrong is that way this is being handled. If the system can't cope with non-letters and spaces it needs to say that. How about the following error message: Our system is unable to process last names that contain non-letters, please replace them with spaces. Don't blame me for having a last name that your system doesn't like, whose fault is that? Saying "Your

### The Elevator Button Problem

User interface design is hard. It's hard because people perceive apparently simple things very differently. For example, take a look at this interface to an elevator: From flickr Now imagine the following situation. You are on the third floor of this building and you wish to go to the tenth. The elevator is on the fifth floor and there's an indicator that tells you where it is. Which button do you press? Most people probably say: "press up" since they want to go up. Not long ago I watched someone do the opposite and questioned them about their behavior. They said: "well the elevator is on the fifth floor and I am on the third, so I want it to come down to me". Much can be learnt about the design of user interfaces by considering this, apparently, simple interface. If you think about the elevator button problem you'll find that something so simple has hidden depths. How do people learn about elevator calling? What's the right amount of