Showing posts with label pastimes. Show all posts
Showing posts with label pastimes. Show all posts

Friday, January 21, 2011

Sledding the State Capitol

kw: pastimes, childhood, sledding

To the right in this image is the Utah State Capitol building in Salt Lake City. (Click to see a larger, clearer image. The image is looking due west.) Lined up with the Capitol building and heading south is State Street, and the next major street to the west is Main. The major east-west street that passes the large building on the left is North Temple Street. The Mormon Tabernacle is just out of the picture to the left.

When I was a child the city police would block off that 1/3-mile stretch of State Street for sledding. Parents could drive their children to the entrance to the Capitol grounds, then drive over to Main and down to North Temple, and back over to State to pick them up. Younger kids might be driven back to the top; older kids got to walk back up. I remember that we did this only once, when I was about eight (1955 or early 1956). This hill has about a 6% grade, just perfect for sledding. We were there a couple of hours, time enough to slide down seven or eight times.

I suppose it was done on either a holiday or a Saturday when there was little business along State Street and none at the Capitol. Who can imagine in these days being allowed to sled on a major city street, no matter how nice its hill?

Monday, January 03, 2011

Havin fun in the deep sky

kw: astronomy, surveys, pastimes

Among my favorite images from my involvement with The Galaxy Zoo Hubble is this one of AHZ2000ke7, a distant (2.26 GLy or 0.7 GPc) spiral galaxy near the boundary of Leo and Sextans.


Its dimensions are about 7"x10", and it is located at RH 9:59:57 and Dec +1°59'14" (Decimal: 149.9891 and 1.9872). Ten arc seconds at this distance works out to about 110,000 light-years across, making this galaxy very close in size to the Milky Way. This image is about 44" across, and every visible object is a galaxy. I decided to see to what extent it is shown in Google Sky. An image to about the same scale is shown here:


Most of Google Sky is from Sloan (SDSS) images and other earth-bound imaging. Viewing through the atmosphere, even at mile-high elevations such as the Sloan's location, seldom exceeds 0.3" resolution, so this image is probably among the best earth-bound views available. Most of Google Sky is intended (At least so far) for viewing at about a 10x smaller scale, such as this view, centered on the same galaxy, but 7'20" across:


As before, everything visible in this image is a galaxy. The resolution is about 1" per pixel, so it corresponds to the view at about 300x through a telescope larger than 8 inches. However, you'd be hard put to see these galaxies visually, even through a larger telescope, because they are quite faint. A "rich field" telescope at 300x would be a 60-inch, such as the McDonald telescope in Texas. The digital detectors in modern telescopes reach far beyond what the eye can see. If we back off another factor of ten, Google Sky shows us a view like this:


This image is just over a degree across, and represents the view at 30x, though with greater sensitivity than the eye. Now, nearly everything shown is a star in the Milky Way. Considering how hard it is for an amateur to get good views approaching 300x, and how much harder it is to take pictures with such resolution, I find Google Sky is a great resource for "desktop astronomy", and Galaxy Zoo gives me the deepest views available, though of objects the survey directors find interesting. There's a great deal of beauty "out there."

Wednesday, July 14, 2010

The computer is dead, long live the computer

kw: pastimes, computers

Here's where the time went:
  • Saturday afternoon: boxes arrived, built computer, with much help from son (MB MSI P55-GD80, Intel I5-750 CPU). Got it to start booting, but CPU would not complete initialization sequence.
  • Sunday afternoon: played around, finally gave up.
  • Monday midday: took to a technician.
  • Tuesday afternoon: picked it up, paid technician. I'd found the exact one way to mis-locate a jumper and get a partial bootup.
  • Tuesday evening: fail to load operating system for a few hours, until I took out the DVD to check it. It was upside down! Load operating system (Win 7 64 bit).
  • Wednesday evening: remove old computer from workstation; move new computer to workstation. Obtain antivirus software and get it set up. Load printer/scanner drivers and conrol utility for scanning. Start getting familiar with Win 7 (old computer ran XP).
  • Now it is almost 10 PM. Will crash for the night. Must arise early tomorrow, as usual.
I think I've learned my lesson. This is the second build for my son and I, and both times we've needed the technician's help. Building systems is for those more skilled in "lab" work than I. You'd have thought I learned that in grad school, where as a chem major I blew myself up regularly. At the moment I have a shiny new computer, all up to date. The prior one lasted eight years. Whenever this one gives up the ghost, I'll just buy something at one of the box stores, or take advantage of a Dell customization deal (or the ~2020 equivalent).

Tuesday, February 02, 2010

When we had time to quilt

kw: musings, culture, pastimes

I've never observed a quilting bee, but my grandmother was a great fan of them. With the help of a gaggle of friends, she made quilts for all my brothers and me (we have no sisters), in this double-wedding-ring design, but with a white rather than green background. This image came from a Google Products ad.

Born in 1899, she was 55 before she ever saw a television set. When a woman had leisure time, she was expected to occupy herself with handicrafts, usually sewing. Such tasks, and indeed any tasks that did not require one to be home-bound, were turned into social occasions. The quilting bee was (and for many it still is) the cream of one's social life.

Piecing a top can be a solitary activity, but it doesn't have to be. My wife was in a quilting group when we lived in Oklahoma. She and several others would sit in a loose group, each piecing together their sections (usually squares). In my grandmother's day, it was all hand stitching. More recently, machine piecing and assembling is more common, but it still lends itself to cameraderie; they just have to talk louder over the sounds of the sewing machines. As I understand it, piecing is putting together the tiny pieces into larger units, which are then assembled to make the quilt top.

Once the top is assembled, the quilting step is the greatest fun. The assembled top is attached to padding and a sheet backing, mounted on a quilting frame, then the quilting patterns are stitched in. While machine quilting has become more common, the intricate patterns of traditional quilts are still best produced by hand, by a half-dozen or so skilled women, stitching, gossiping, and enjoying one another's presence. (To be fair, I understand there are men who participate in quilting bees, and all-male quilting bees. I'd enjoy that if I had any hand control at all. No way can I make twelve stitches per inch!).

As this close-up shows, a traditional quilting pattern is lovely. It's function is to hold the quilt to the batting and backing; without it the batting will wad up.

It also shows that one cannot produce the double-wedding-ring pattern based on pieced squares. I can think of two ways to put it together, one using alternating circles and smaller white squares, plus dual-arc edge sections; another using congruent shapes with two in-arcs and two out-arcs each, plus a set which are full circles, to be put along two edges. Either way, this is a more challenging pattern than almost any other.

I love quilts. I grew up sleeping under antique quilts. Most quilts are rather thin. When we lived in South Dakota, my wife and I made a thick comforter with a quilted top (much less elaborate than nearly any other quilt, as you might imagine). It is overly warm in this area.

I've obtained dozens of photos of quilts, which I use in my "photo show" screen saver. The endless imagination of quilters everywhere amazes me. It it the premier folk art form.