The Tanana Ice Classic for 2014 is over.

2014/05/07 Updated with correct date !

The Tanana River officially broke up and the Tripod moved down river stopping the clock at 3:48 PM Alaska Standard Time April 25th, 2014

This makes last years very late breakup seem anomalous. But of course its only weather!

Adding this years figures to the data and you get plots which seems to follow the various global temperature profiles of: warming since 1970s until 1998 then static to present.
People have said the earlier times of the breakup is due to industrialisation upstream of Nenana - However the static/reversed slope seems to show that either industrialisation has reversed or perhaps, maybe, the temperature is having an effect!:

 Top 2 traces show timings from beginning of the year
Final trace is timing from vernal Equinox

All plots use AK time:
The first splits the data into 3 segments
The second assumes that there is no upturn and hence only 2 lines
Smoothing is done with Hodrick Prescott filter from http://www.web-reg.de/hp_addin.html

Breakup data from


Recover Deleted Files in Windows 7


Only the important bits below

What is Restore Previous Versions, exactly?

Introduced in Vista and now present in all editions of Windows 7, previous versions are local backups of every data file and folder that changes on your system.
The backups are created automatically and are instantly accessible.

Previous versions do for your standard documents (text files, spreadsheets, photos, whatever) what Windows System Restore does for system files.

The function that creates previous versions is enabled by default and is probably working right now on your PC, whether you’ve ever used the previous-versions feature or not.

As Microsoft’s FAQ puts it: “You can use previous versions to restore files and folders that you accidentally modified or deleted, or that were damaged.

Depending on the type of file or folder, you can open, save to a different location, or restore a previous version.”

Exploring your previous-version files

By default, Vista and Win7 make copies of changed folders and files at least once a day.

But you can adjust the schedule at will.

To start, open Windows Explorer, right-click My Documents (or wherever), and select Restore previous versions

The rest is logical!!!

An important point is: right clicking a filename and using restore previous version only works if you have not moved it. Using the above method allows recovery from its original location.