I read popular physics: Explosions at the edge

This is part of my series where I read physics articles in Scientific American, and rant about barely related tangents in order to provide “context”.

After the November issue, which didn’t really have any physics articles at all, the December issue has two major articles! One is astronomy, the other one is about the fusion reactor, ITER. But, after complaining about how all the physics articles are about astronomy, it looks like I’m still choosing the astronomy article. The ITER article is just a bunch of photos of the engineering, and I don’t have much to say about that.

So, the astronomy article is “Explosions at the Edge” (or that’s how it’s titled in print). It’s about the surprisingly diverse ways that massive stars can go supernova. For example, rather than simply exploding, a star may first shed a layer of gas, and then the subsequent explosion will collide with that gas, producing a prodigious burst of light.

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Practice and sight-reading in video games

Earlier this year, I played Celeste and Hollow Knight, two critically acclaimed platformers released in 2018 and 2017 respectively. Games critics basically talk about these games all the time, so I knew what they were and I knew they were quote-unquote “good” games. But they’re outside my wheelhouse, in that they are not puzzle or story games. So I only played them recently, and only because my husband bought them for himself.

In both games, I noticed a difference in how my husband and I played. Initially, my husband would play, and then I got interested. I would skip ahead of my husband in leaps and bounds. But eventually, towards the end, my husband got better than me. He would start consistently beating challenges that I could only beat after many tries, and would reach further through the post-game content. What gives?

box art for celeste and hollow knight

Image credit: Wikimedia Commons (1) (2)

Both of these games present very difficult technical challenges, where you have to input a precise series of moves or react quickly to what you see on screen. They both promote the feeling of mastery once the challenges are complete. They are both very good at what they’re trying to do. Celeste in particular was a favorite for both of us, because instant respawns greatly reduce the friction to achieve that feeling of mastery. But my husband definitely enjoyed them more than I did, and I think it has to do with our different learning curves and learning styles. It may also explain why I don’t care for games that emphasize technical mastery, and go more for those puzzle and story games.

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Origami: Leaf

Leaf

Leaf, designed by Ekaterina Lukasheva, from Floral Origami

Today’s origami design is a relatively simple one, but I love simple stuff like this!  You just pleat a square back and forth diagonally across the paper, and then pinch it in the middle.

For this model, I used paper with diagonal stripes, so that the stripes approximately align with the folds.  This creates an iridescent effect, as the colors subtly change depending on your viewing angle.  Now, the stripes don’t align exactly with the folds, so there’s a bit of a subtle interference pattern as well.  I love the idea of making these subtle interactions between the paper patterns and the origami design, but I think it rarely aesthetically succeeds.  This is my favorite example.

I read popular physics: Orbital Aggression

This is part of my series where I read physics articles in Scientific American, and publicly ponder what choices in life brought me to this point. This month’s “physics” article is not really about physics at all, but that’s the bed I made.

The article is titled “Orbital Aggression” (paywalled), and it’s about the possibility of space war. Space war refers not to war rained down from space, but rather war that targets satellites. Especially in the US, satellites play an important role in communication and imaging, such as transmitting credit card transactions or monitoring weather. They’re also used by the military, again especially the US military, which occupies every corner of the globe.

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Reflections on my family

In queer culture and media, there is a lot of emphasis on one’s “found family” or “chosen family”–families composed of people who are not related by blood. This is because a lot of LGBTQ people face rejection from their family of origin, and so if they want a supportive family they need to build their own from the ground up. Found families are not an LGBTQ-exclusive idea, but sources say that it originated in LGBTQ communities, and the associations continue to be very strong. In fictional media, found families are everywhere–we like our ensemble casts!–but queer media tends to go a step further, and hold it as a central theme.

I am fortunate enough that I have never been in want of a chosen family. I mean, I did, in the literal sense, choose my husband to be part of my family, but that doesn’t really fit the theme of a “chosen family”, which is more commonly understood as a group of close friends. So for me, found families are not real. They are a trope that I see in fiction that does not correspond to anything in my life. It’s kind of like living Los Angeles, where it never snows, and being surrounded by cultural depictions of winter as a snowy season.  I’m not complaining, I’m just remarking on how it puts my own experiences in context.

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From the Archives: Evaluating FiveThirtyEight

This is a repost of a simple analysis I did in 2012, evaluating the presidential predictions of FiveThirtyEight.  What a different time it was.  If readers are interested, I could try to repeat the analysis for 2020.

The news is saying that Nate Silver (who does election predictions at FiveThirtyEight) got fifty states out of fifty. It’s being reported as a victory of math nerds over pundits.

In my humble opinion, getting 50 out of 50 is somewhat meaningless. A lot of those states weren’t exactly swing states! And if he gets some of them wrong, that doesn’t mean his probabilistic predictions were wrong. Likewise, if he gets them right, that doesn’t mean he was right.

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Drowning, again

cn: sexual violence, and sexual coercion in particular

I’ve said before that sexual violence is a lot like drowning: it does not look like how it looks in the movies. That’s what every lifeguard needs to learn, if they are to help people in need. It is what advocates against sexual violence need to learn too.

When I point out that a story is an example sexual violence, I get shock and disbelief. That is understandable; it does not look how you expected. Now you can adjust your expectations to what sexual violence really looks like.

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