friendly version of date formats

The users of my application have the ability to choose their prefered date format between:
dd/mm/yyyy
mm/dd/yyyy
yyyy-mm-dd
The 1st one (which has the Java pattern dd/MM/yyyy) produces 31/12/2011.
I’ve decided that a more friendly ver…
Should a light switch be small or big, or does this depend on other factors?

Small and big light switch compared:
It’s strange that this usually differs by country. The big ones are easier to hit, but the small ones provide better feedback (if you don’t immediately see the light). What one is the …
Where can you find high resolution images of Android phones?

I’m looking for high res Android phone “shell” to more effectively visualize my Android apps.
For example, the Samsung Galaxy Vibrant:
http://www.samsung.com/us/system/consumer/product/sg/hi/89/sghi897zkaatt/SGH-I897ZKAAT…
What are the most important scientific papers about “Adaptive User Interface for mobile devices”?

What are the most important scientific papers about “Adaptive User Interface for mobile devices” ?
Shortly, I need to do a research about how to generate AUIs for mobile device depending on user task, device features, contex…
Recommended button sizes on web pages

What are the current usability guidelines for the size of buttons (or anything clickable) on web pages?
How to graphically represent a language

Websites often present language selection to users with flag icons, but I think this is simply wrong. Flags represent countries.
There are two reasons for a user to change the display language (or at least click on that flag…
Friendly format for phone numbers

Currently, on my website, users are required to input their phone number in a very specific format (555-555-5555). If you forget the dashes it breaks. Does anyone have a good suggestion for how to be more flexible with allo…
Name of this design pattern for Dynamic Search – easily add/remove/alter criteria

I’m looking for the name of the pattern or technique whereby one can dynamically choose to add, remove, or alter search criteria. I’m thinking it is mostly (if not fully) rule-driven, but I’m not sure if that’s a requirement …
Name of this design pattern for Dynamic Search – easily add/remove/alter criteria

I’m looking for the name of the pattern or technique whereby one can dynamically choose to add, remove, or alter search criteria. I’m thinking it is mostly (if not fully) rule-driven, but I’m not sure if that’s a requirement …
What’s the best way to view a deep hierarchy?

I’ve been pondering the best way to show a deep hierarchy for a desktop application I’m working on. Here are some alternative designs I’m considering…
Mac OSX Finder:
If you understand what you’re seeing, the “Columns V…