Skip to main content

An Afternoon in San Francisco

I flew into San Francisco this morning about eleven o'clock. I'm staying at the Hotel Des Art in the middle of everything. My room wasn't ready until three, so I went down to the wharf to hang out. The short version: I got a haircut, went down to the Buena Vista for lunch, saw some art and listened to some music.

First, the haircut. I was a little flattered when my new barber told me I had a great shaped head. Who knew! My parents have often told me that they turned me over every six hours just like the doctor said to make sure I didn't wind up with a lopsided head. Finally, we all have the proof that it actually worked! Next, my barber commented that I have a lot of hair. Cool, I guess where I still have it at all, there is quite a bit of it.

All of this was well and fine until about the fifth time he told me the same things. I hadn't been paying attention. I looked up and realized that apparently he had taken it as his personal mission to display my 'well-shaped' head to the world by getting rid of a 'lot of hair'. I'm happy to report that I got him stopped without incident. I'll be able to save quite a bit of time brushing my hair for the next weeks. There's just not enough left to bother with at the moment.

Next, it was off to the Buena Vista for my traditional Irish Coffee and breakfast. That's where I met Lea my waitress and Andy a weekend regular seated at the bar next to me. Lea recently did a voice over for a children's story book where she played nineteen different characters! Andy has lived in the San Francisco area since 1958. He had lots of great stories, but the best by far had to do with the advent of Go-Go dancers at the Condor club, hydraulically lifted pianos and the dangers of mixing extra-marital sex with the same.


Well fed, I headed a few doors down to my favorite art gallery to check out their new additions.


Finally, a little more artistically educated I headed for home. On the way, I walked by Adventure Coffee on Columbus. As I passed the open door I heard a beautiful voice, looked inside and saw it's owner playing guitar. I wandered up the sidewalk a few more doors, had a gut feeling I should have stopped and headed back.

Rogin Galante Singer/Songwriter

Comments

Popular posts from this blog

Cool Math Tricks: Deriving the Divergence, (Del or Nabla) into New (Cylindrical) Coordinate Systems

Now available as a Kindle ebook for 99 cents! Get a spiffy ebook, and fund more physics
The following is a pretty lengthy procedure, but converting the divergence, (nabla, del) operator between coordinate systems comes up pretty often. While there are tables for converting between common coordinate systems, there seem to be fewer explanations of the procedure for deriving the conversion, so here goes!

What do we actually want?

To convert the Cartesian nabla



to the nabla for another coordinate system, say… cylindrical coordinates.



What we’ll need:

1. The Cartesian Nabla:



2. A set of equations relating the Cartesian coordinates to cylindrical coordinates:



3. A set of equations relating the Cartesian basis vectors to the basis vectors of the new coordinate system:



How to do it:

Use the chain rule for differentiation to convert the derivatives with respect to the Cartesian variables to derivatives with respect to the cylindrical variables.

The chain rule can be used to convert a differe…

Division: Distributing the Work

Our unschooling math comes in bits and pieces.  The oldest kid here, seven year-old No. 1 loves math problems, so math moves along pretty fast for her.  Here’s how she arrived at the distributive property recently.  Tldr; it came about only because she needed it.
“Give me a math problem!” No. 1 asked Mom-person.

“OK, what’s 18 divided by 2?  But, you’re going to have to do it as you walk.  You and Dad need to head out.”

And so, No. 1 and I found ourselves headed out on our mini-adventure with a new math problem to discuss.

One looked at the ceiling of the library lost in thought as we walked.  She glanced down at her fingers for a moment.  “Is it six?”

“I don’t know, let’s see,” I hedged.  “What’s two times six?  Is it eighteen?”

One looked at me hopefully heading back into her mental math.

I needed to visit the restroom before we left, so I hurried her calculation along.  “What’s two times five?”

I got a grin, and another look indicating she was thinking about that one.

I flashed eac…

The Javascript Google URL Shortener Client API

I was working with the Google API Javascript Client this week to shorten the URLs of Google static maps generated by my ham radio QSL mapper. The client interface provided by Google is very useful. It took me a while to work through some of the less clear documentation, so I thought I'd add a few notes that would have helped me here. First, you only need to authenticate your application to the url shortener application if you want to track statistics on your shortened urls. If you just want the shortened URL, you don't need to worry about this. The worst part for me was that the smaple code only showed how to get a long url from an already shortened rul. If you follow the doucmentaiotn on the insert method, (the method for getting a shortened url from a long one), there is a reference to a rather nebulous Url resource required argument. It's not at all clear how to create one of these in Javascript. The following example code shows how:
var request = gapi.clie…