Greg and Kat's blog

It snowed in Burnaby yesterday (but somehow not most of the rest of the lower-mainland). After the last snowfall, I had looked out of the window at night and thought that the snow under the streetlights looked cool. Unfortunately, I didn’t have the presence of mind to do anything about it.

So last night, I grabbed my camera and panoramic tripod head and set out.

I walked north a few blocks to get away from Hastings (figuring that farther from Hastings would mean less traffic). My first stop was smack in the middle of a street for a full 360° panoramic shot:

[You can click the link there for larger versions. If you have a Java plugin working, you can click the “View Panorama” link on the left of that page for a nice drag-around viewer.]

Making a panorama like this requires 40–50 separate frames (with the lens I have) that are then stitched together. Everything has to be set to manual on the camera (exposure, focus, white balance). The whole process takes 10–15 minutes for a single “picture”.

In this case, each frame was exposed for 1 second at f/5.6, ISO 1600. I left the white balance set for for tungsten light. That’s why the image has the orange colouring from the sodium streetlights. I only had to move our of the way of a car once during that shot.

Having had enough of dodging traffic, I found myself a convenient traffic circle for the next one:

The camera settings were the same, except this time I set a custom white balance so the snow is actually white. That is exactly what I was hoping for when I set out.

On the way back, I saw some drops of water that had frozen on a little tree, and couldn’t resist stopping for one last shot of them. I set the aperture to f/2.8 for that shot for maximum Bokeh goodness.

Finally, with frozen fingers, I went home and fired up Hugin to get the panoramas together.

Edit 22:00: Shrunk the panoramas in the gallery. The Java VM seems to have a memory limit that wouldn’t let the originals display.

Well, it’s Link Friday again. I thought I had a lot of links to share, but I don’t have nearly as many links backed up as straight-up blog topics. Maybe Link Friday won’t be every Friday.

Anyway, for this week I have some links related to teaching. I teach stuff to people all the time, and suppose I must know something about it. Believe it or not, there are people that have made observations that even I haven’t had.

First are a couple of things my students should read. Everybody below about 85% in CMPT 120 should read How NOT to go about a programming assignment (Google cache link). Part of teaching a first year programming course is seeing each and every one of these things. Repeatedly.

This prof’s Top Ten No Sympathy Lines are really interesting. In particular, his answer to “There Was Too Much Memorization” was really insightful.

For the last several years, I have been trying to minimize the textbooks required for my classes: the pricing is criminal and they usually aren’t all that good. My rule has been to only require texts if they are really good and if I’m going use them very heavily. Otherwise, they are only recommended. So, this guy is my hero: UVSC prof. quits books.

I’m not sure that Taylor Mali on what teachers make particularly applies to me, but it makes me think that the high school teachers I know are a lot cooler.

Finally, the… um… darker side of teaching. Apparently, according to a peer-reviewed article, Teaching may be hazardous to your marriage. And the complementary article: If College-Themed Porn Were Real.

A while ago, I posted a calculation that I had done on renting a home vs buying one. Those calculations have been intriguing me ever since. I have had several conversations with people about the pros and cons, and and what-if scenarios.

I finally decided that I needed to automate these calculations so I could easily handle the what-ifs. Thus came to be my very own Renting vs Buying Calculator.

Follow that link, have a look, and play with some numbers. The buttons beside text boxes generally calculate/estimate the corresponding value from relevant numbers above. You only really have to fill in the numbers without buttons beside them. The defaults are my current best-guess at the economics of buying/renting a nice condo in suburban Vancouver.

It’s shocking how hard it is to make buying financially better, as long as you assume two important things:

• House values aren’t going to continue to rise at the outrageous rates they have for the last five years in North America. This is already slowing, and betting your only/largest investment on that assumption is foolish.
• You have the discipline to invest in something else (mutual funds or what have you) without the pressure of a looming mortgage payment. Automatic monthly withdrawals make this easy, but it has to actually happen.

The only scenario that I can find where buying has a marginal benefit is buying a small detached home (one of the 1970s-era Vancouver specials), and renting a basement suite. Of course, that comes with the extra responsibilities and headaches of being a landlord.

On the other hand, it can be hard to find rental places that are as nice as what you might imagine buying. The rental market seems to generally target “livable”, not “nice”.

Any comments on the calculator are appreciated. It has everything I can think of that should be in there, but some of you might know better than me.

Update 12/2010: vancouvercondo.info has created a similar calculator.

As most of you know, Amanda is leaving Computing Science and movin’ on up to Student Services. That’s very sad, and I’ll blog about it later.

Because Amanda’s a good boss, she wanted to do something for her team before she left. She decided on playing hookie on Friday afternoon and taking the team to a movie. (But shhhhh! It’s a secret: no sane manager would play hookie with their entire team.)

We discussed the movie a bit before we went. I was campaigning for Juno. Instead, she chose 27 Dresses.

Now, I’m not above watching a decent chick-flick. I remember About a Boy being okay, for example. Actually, I kind of like Hugh Grant. This movie, on the other hand, wasn’t “decent”. Not even close.

None of the characters were sympathetic: I hated them all. Even the protagonist (who I suspect I was supposed to care about) was whiney, meek, and generally annoying. The “pretty” sister wasn’t actually as pretty as the not-as-pretty, practical one. Both guys were dicks and too stupid to live.

Basically, if the movie had ended with everyone dying in a fire, I would have been fine with that. The only exception was Judy Greer, who I think I have a bit of a crush on, and whose character was actually compelling (but on screen for maybe two minutes).

So guys: if you have a choice between seeing 27 Dresses and paying nine bucks to sit in the theatre lobby and play video games, get yourself a roll of quarters. The women in the crowd seemed to like it, though.

In my thrice-weekly-blogging quest, I’m going to try to use Fridays as “link day”. For the first Greg The Aggregator day, I’m going to link to some of my favourite flash-based games.

Of course, there’s the stupidly-simple Line Rider. The deal is simple: draw lines and a little guy on a sled rides down them. You wouldn’t think that would be so addictive, but I distinctly remember spending an entire Friday afternoon in the CSSS common room with Jen trying to make him do loops, flips, etc.

I have recently been addicted to Filler, which doesn’t seem to be working for me right at the moment, but will likely be back soon. There are some little balls bouncing around: avoid those. You place bigger circles around the grid until you’ve filled up 2/3 of the board.

Shuffle isn’t much more than a flash version of marbles, but fun.

Finally, Zwingo is another marble-like game. Your job is to guard the big marble in the centre with the marble-on-an-elastic that you control.

Okay, none of those sound like much fun, but go play them and find out. Oddly, all of the games I’ve listed here have at least a little physics involved. I guess we’ve figured out what I like in a simple flash game.

Subject: Re: Project Don’t Die Before I Reach The Age Of 28

As one of the facultative vegetarians that you were probably referring to, I feel like I should respond.

My first thought to the taste-of-vegetables problem is fairly straightforward, I think. If you like the taste of meat, do the same thing you would when trying to give a dog a pill: mix it with meat. The obvious device for this is probably the stir fry.

Also, consider the wonders of cheese. Nothing makes broccoli palatable like a cheese sauce. Might I also dare to suggest you have a look at a cookbook or two? They’re like algorithms textbooks, but for food.

One of the things that really pisses me off are people I refer to as “penance vegetarians”. These are the people that seem to treat vegetarianism like it’s punishment for something and have been doing it for far too long. They are the ones that like tofu and snack from little bags of what appears to be bird food. They rave about the food at the Nam.

Vegetarian food can have fat in it. It can even have flavour if you play your cards right.

On the subject of gastrointestinal stress: I’m sure you’ll be fine. The system seems to get used to whatever one has been giving it. For example, I don’t think Mexican people are in a constant state of distress, but Mexican food it’s always an easy way to a punchline for American sitcom characters. Stay the course, and you’ll be fine.

I have decided to sit in on Ted‘s writing course, CMPT 376. This is the first time the course has been offered. I would like to be the kind of person that can teach a course like this, and this seems like a good way.

Notice the careful wording in the last sentence. It didn’t say “I’d like to teach this course in the future.” That’s a stronger statement that I’m just not willing to make yet.

After one lecture, I have learned one important thing: CMPT 376 is like Burning Man. There are no spectators, only participants. My plan all along was to participate in lectures, so I’m not too worried there.

The work I had planned on ignoring was the writing exercise for each class. (Thrice-weekly? Lecturly? There needs to be a word for that.) But, after a lecture, I have decided to give it the old college-try. But, there’s not much point in printing out what I write and giving it to Ted. I don’t need the marks.

So, I’m going to try to post here three times a week, approximately on Monday, Wednesday, and Friday. My own version of NaBloPoMo.

Like everything else in 376, I make no promises about making it all the way to the end of the semester. Some of the posts may lack my usual wit and sparkle, in favour of volume, but you’ll deal.