but i think im going to be ok

any one up for the for block party at my place

let me know

my demo server will come down in this prosess. i do not know when or how i will get it back up.

all classes will be on hold for the next fiew weeks. if you would like to take a class please see bluebrad.com/class for more information.

if you would like to help me move let me know

• Program: Adobe Illustrator CS3
• Difficulty: Intermediate
• Estimated Completion Time: 60 minutes

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Project Status & News

• The final engineering design is nearing completion

Description

This project will lower Magnolia Avenue under the Union Pacific Railroad (UPRR) tracks in Magnolia Center. Then a two track railroad bridge will be constructed over Magnolia. This project will also shift the alignment of Magnolia Avenue approximately 50 feet to the west.

Beatty Drive will be widened between Brockton and De Anza Avenues, and traffic signals will be installed at the intersections of Beatty Drive with Brockton, Magnolia, and De Anza Avenues. Additionally, Merrill Avenue on the east and west side of Magnolia will be converted to a right turn in/out at Magnolia Avenue to facilitate traffic flow.

The project requires relocation of water and electric facilities maintained by the Riverside Public Utilities Department, communication lines owned by AT&T and Charter, gas lines, and relocation of over 6300 feet of sewer line to redirect sewer flows around the grade separation.

Also a storm water pumping station will be constructed. A temporary two-lane detour road on the on the east side of Magnolia Avenue will accommodate traffic while the railroad bridge is under construction.

Construction Schedule

Construction is expected to start in Fall 2009 and take approximately 18 months to complete.

Project Benefits

• Eliminates 2.3 hours per day of gate down time which stops traffic on Magnolia
• Eliminates over 3 minutes of average delay for each emergency responder that encounters a train
• Eliminates over 16.8 tons per year of green house gases generated by idling vehicles delayed by trains (2030)

Project Facts

• Magnolia Avenue currently carries a total of about 25,000 vehicles per day
• Four bus routes with a total of 178 buses traverse the Magnolia Avenue at-grade crossing each day
• This segment of the Union Pacific rail line is used by 47 freight trains and 12 passenger trains daily
• The rail traffic causes approximately 137 minutes of traffic delay per day on Magnolia Avenue
• Between January 1, 2003 and May 2007, Riverside Fire Department emergency response vehicles and American Medical Response ambulances were delayed 44 times with an average delay of 3.25 minutes by trains blocking traffic at this crossing.

Project Cost and Funding:

The total estimated project cost is approximately $51.2 million. Project funding includes:

Let’s take a look at the efficiency of this protocol at slotting everyone into acceptable urinals.  For some numbers of urinals, this protocol leads to efficient placement.  If there are five urinals, they fill up like this:

The first two guys take the end and the third guy takes the middle one.  At this point, the urinals are jammed — no further guys can pee without Awkwardness.  But it’s pretty efficient; over 50% of the urinals are used.

On the other hand, if there are seven urinals, they don’t fill up so efficiently:

There should be room for four guys to pee without Awkwardness, but because the third guy followed the protocol and chose the middle urinal, there are no options left for the fourth guy (he presumably pees in a stall or the sink).

For eight urinals, the protocol works better:

So a row of eight urinals has a better packing efficiency than a row of seven, and a row of five is better than either.

This leads us to a question: what is the general formula for the number of guys who will fill in N urinals if they all come in one at a time and follow the urinal protocol? One could write a simple recursive program to solve it, placing one guy at a time, but there’s also a closed-form expression.  If f(n) is the number of guys who can use n urinals, f(n) for n>2 is given by:

The protocol is vulnerable to producing inefficient results for some urinal counts.  Some numbers of urinals encourage efficient packing, and others encourage sparse packing.  If you graph the packing efficiency (f(n)/n), you get this:

This means that some large numbers of urinals will pack efficiently (50%) and some inefficiently (33%).  The ‘best’ number of urinals, corresponding to the peaks of the graph, are of the form:

The worst, on the other hand, are given by:

So, if you want people to pack efficiently into your urinals, there should be 3, 5, 9, 17, or 33 of them, and if you want to take advantage of the protocol to maximize awkwardness, there should be 4, 7, 13, or 25 of them.

These calculations suggest a few other hacks.  Guys: if you enter a bathroom with an awkward number of vacant urinals in a row, rather than taking one of the end ones, you can take one a third of the way down the line.  This will break the awkward row into two optimal rows, turning a worst-case scenario into a best-case one. On the other hand, say you want to create awkwardness.  If the bathroom has an unawkward number of urinals, you can pick one a third of the way in, transforming an optimal row into two awkward rows.

And, of course, if you want to make things really awkward, I suggest printing out this article and trying to explain it to the guy peeing next to you.

Discussion question: This is obviously a male-specific issue.  Can you think of any female-specific experiences that could benefit from some mathematical analysis, experiences which — being a dude — I might be unfamiliar with?  Alignments of periods with sequences of holidays? The patterns to those playground clapping rhymes? Whatever it is that goes on at slumber parties? Post your suggestions in the comments!

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