I’ve been in grading hell all day

But I finally finished the exam for introductory biology. There were two huge problems.

  1. Never again will I give a take-home multiple choice exam. I thought I was being generous: 16 multiple choice questions, one multi-part essay question, and I even gave them a form to fill in. Somehow, many of them didn’t follow the instructions. A form with a space to put in A, B, C, or D for the answer? Nope. Many wrote out answers. What I thought would be an easy grading exercise turned into a nightmare. If I were to do it again, I’d be extremely obvious and specific in how to answer.
  2. Scores were abysmal, but that’s on me. I didn’t spend enough time going over the problems…so now I have to backtrack and cover the material again and give them some more exercises to try out.

Now I have to collapse in a soggy heap. Tomorrow it begins again with an exam from my second course.

I don’t understand how Thoughtslime can be more popular than me

You know, I just posted a happy, joyous video that should lift your hearts and make you feel good about the world. At almost the exact same time, Thoughtslime posted a miserable, depressing video that will make everyone feel bad, and he’ll get a gajillion more views than mine ever will. It’s not fair!

His video is about Amazon, rather than awesome spiders. See? You already know it’s going to be horrible.

Amazon is kind of indispensable in my part of the world. We are a small town with few retail services (well, we do have a plague pit of a grocery store), which means if we want anything but the staples we rely on Amazon. Wait, I wonder…is the ubiquity of Amazon one of the reasons we don’t have many local businesses? Maybe Amazon ought to be nationalized.

Anyway, the video does explain one thing to me. A month or so ago, I had ordered something (not even from Amazon, though), and I got an email notifying me of delivery. I went outside to check, and nope, nothing, it was mystifying. The next day I checked again, in case it had fallen down behind the shrubbery or something, and no, it just wasn’t there. So I went through UPS’s horrible lost package web site, filled out some forms, and awaited their response. I figured it had been misdelivered. This has been a common problem lately, because our county arbitrarily decided to renumber our house — I’ve gotten messages from people asking me why I didn’t answer their mail, and it’s because our old address no longer exists.

Then, the next day, a UPS driver shows up at our door with the package. Great, no worries! But she was so cravenly apologetic and so anxious to explain everything to me, I was somewhat embarrassed for her. Our house was late on her route, it was dark, she drove back and forth trying to see our address, the GPS was no help at all, she’d flagged the delivery because she’d thought she’d found the place, but it wasn’t, on and on and on. Really, I understand, I wasn’t that worried about it, I was aware of how the county had scrambled addresses, and she was so, so grateful when I signed off on the delivery and signed a note saying I was happy with the service. It was a bit wild.

Honestly, friendly UPS delivery driver who dropped off a package at my house in early March, it’s OK. I worry about you now, since it sounds like you’ve got quotas and unrealistic and maybe even dangerous demands on your time. If it takes an extra day or two to get something to me, that’s fine, I won’t give you grief about it, I’m not demanding instant gratification. Be well. If you’re not already, I hope you unionize.

Playing with my camera

Today’s spider time was a bit abbreviated, because my day is jam-packed with stuff scheduled on top of stuff, so I only had a brief moment in the lab. I decided to tinker a bit with a camera lens I’ve been neglecting, the Laowa 25mm f2.8 Ultra Macro 2.5-5.0x. This is a strange little lens with a lot of potential, but I have struggled with it before. It’s just so different from my other lenses, with different properties, and I think I’ll have to invest some serious effort to master. Today was not that effort. I shot a few quick photos before I had to refocus on today’s classes.

Spiders are the ideal models for macrophotography, because the ones I have are so calm and stable. This little lady was practically immobile for the entire half hour I spent playing with lights and backgrounds and moving in close for pictures.

One thing I discovered is that the Laowa is surprisingly good at collecting light. My first photos were at f/2.8, an exposure of 1/500, and they were all washed out. I kept reducing the exposure and closing off the aperture, and still got usable photos. So it’s got that going for it. On the other hand, the depth of focus is still pretty shallow and I had to stick the lens right in the spider’s face to get it in view, and one thing I like in a lens is a forgiving working distance. Fortunately, this spider was imperturbable.

Anyway, I played for a bit. The one on the left is shot at f/16, the other two at f/2.8. I’m not straining for light in any of them, which is nice. All are at 2.5x, I’ll have to try the 5x option next and see how that goes.

I have a mostly free day tomorrow! I’ll have to practice some more, and maybe do some comparisons with the Tokina Macro 100 F2.8 D, which is currently my favorite lens for field work. I don’t think the Laowa can replace it, but might make a good choice for the lab.

Now…on to classes and grading!

You call that a defense?

Here’s a good summary of the first day in the trial of George Floyd’s murderer.

To summarize the summary, the defense has two key arguments. They are fundamentally racist arguments.

First, they want to claim that choking by kneeling on Floyd’s neck was not the cause of death. What killed him was poor health, specifically hypertension, and drugs. Don’t you know that all black people have high blood pressure and are jacked up on drugs? You can’t blame that poor white cop who was just doing his job in a perfectly normal way when Floyd up and died in custody! They claim that the killer was just following his training, which if true, means the entire Minneapolis police department ought to be fired and indicted.

Their second defense is even worse: that the killer didn’t mean to murder George Floyd, he was just so distracted by what the unruly mob of citizens, who were on the verge of erupting into savage violence, that he forgot how long he was crushing the throat of his victim. We’ve all seen the videos, the jurors have all seen them multiple times now, and there’s nothing accurate in that representation. It was a small group of citizens who are mostly begging and pleading with the cop to let him breathe. They are mostly black, though, so I guess this is an appeal to the prejudices of the kind of juror who sees a gang if they spot two black people in conversation.

These are bad arguments that rely entirely on biases, not facts.

They might just work.