dangermouse.net – David Morgan-Mar

Making colour combo lighting

Overnight, since yesterday’s post, we added almost 50 mm more rain to make yesterday’s total 122 mm. It was really wet. There was flash flooding in many parts of Sydney, including in our basement garage, but not too serious thankfully. Today it continued raining until about lunchtime, but then cleared up, and the afternoon was sunny, but cold and windy.

After my morning critical thinking classes, I went to Wenona School again to help students out with science projects. We’d finished the pinhole cameras last week, and this week we worked on taping coloured filters over LED stage lights to make coloured lighting. We arrayed the lights and tested various combinations. I showed how red, green, and blue lights combine to make white, and then the students had fun putting their hands in front of them to make coloured shadows as they intercepted the lights coming from different angles. I explained what was happening so they understood the science behind it, and the difference between additive colour mixing (like light) and subtractive (like with paint).

I came home and had three more classes this evening. Another busy day!

New window sills and coat racks

The builder came back today to complete work on our new window sills. I took photos yesterday to show some of the work being done. Here’s one of the living room windows after the wooden sill was removed, showing the cracked masonry underneath.

And here’s the same window after the masonry was repaired and the new sill was put in place, but before it was painted. (The perspective is different because I used the wider angle lens on my phone.)

Today the builder filled in some small gaps, then sanded and painted the sills with undercoat. We’re leaving them like that and the final coat will be put on by the painters who will be doing everything in October.

While he was here, I got the builder to drill holes for me to install new coat racks in the bedroom. After he left I screwed them in and they look great. The builder also stuck our apartment number back on the outside of the front door. It had been taken off the old door before it got replaced for fire safety reasons back in March(!) and hadn’t been replaced yet.

Apart from all this I had an online science class and essay writing class to teach, and then this evening three critical thinking classes. In the science class I got the student to dissolve salt, sugar, and epsom salts in three different glasses of water, and we’re going to evaporate them and make crystals. Hopefully by next week’s class we’ll see some good ones.

The other news today is the weather. The forecast yesterday when I looked was for 10-35 mm of rain. But we’ve now had 75 mm in less than 12 hours, with another 12 hours to go before the daily total is recorded at 9am, plus another 7 mm overnight last night. The rain has been truly torrential at times – we had almost 20 mm in one half-hour period. And lots of lightning and very loud thunder. Several times the thunder rattled the windows, it was that close and loud. The forecast for tonight warns of the possibility of damaging winds and heavy hail. And tomorrow we are expecting up to another 35 mm of rain. Some flood warnings have been issued for parts of the state.

It looks like there’ll be a break in the rain for a while, on the rain radar. Hopefully in time for when I take Scully out tonight for her bedtime toilet!

Replacing window sills and cleaning behind furniture

Today was unseasonably warm like yesterday, but unlike yesterday it wasn’t 29°C and dry. Today was 26°C and very humid, which in some ways felt worse. The humidity came with rain blowing up from the south, which will cause temperatures to plummet overnight, back to winter chill for the next few days.

Today builders came in to replace our window sills. We’re having the old water-damaged ones replaced before we repaint the whole place next month. The builders ripped the old wooden sills off, which cracked some of the concrete. One sill in the living room had huge chinks of concrete come loose, revealing the raw bricks below. The builders filled the gaps with new concrete and laid the new wooden sills on top. They’re coming back tomorrow to give them an undercoat of paint, which will then be covered with our chosen colour scheme by the painters in October.

This work involved moving a fair bit of furniture away from the walls, where it’s been for many years. You don’t want to know how much dust and grime was behind them! I vacuumed the areas behind all the moved furniture and filled the cleaner dust container so much that I had to empty it immediately. (Normally it’s good for two whole cleans of the entire house.) I also washed down the walls and skirting boards with sugar soap to get some discolouration and grime off. Although the painters will do a thorough clean and preparation of all the surfaces before painting. I just couldn’t stand the sight of the mess and had to clean it up a bit.

In other renovation news, we got confirmation of a booking date for the electrician to install the new downlights in the kitchen. That will be on the 23rd of this month, the same date as the stone polisher will be in to polish the stone floor in the bathroom. Which is good, they can both do their thing at the same time and I won’t need to stay home twice for two different tradesmen.

I also write my new critical thinking class for the week, on the topic of “Likes”. And a new science class for my science student tomorrow. We’re going to be starting an experiment to grow crystals, and learning about how atoms combine in different ways to make molecules or crystals.

A taste of summer in early spring

Today was all about the weather. We’re just emerging from winter, but today got up to 29°c here in Sydney, and over 30°C in some suburbs. Our warmest day since mid-April. It won’t last though, Wednesday is forecast to be 19°C and Thursday just 17°C. My friends and I have often said that spring in Sydney is not a series of gradually warming days – it’s a series of hot and cold days dithered together.

I did my four online classes this morning, then took Scully to my wife’s work. I ran 5k back home in the heat – it was about 27°C at the time, before the peak heat. It wasn’t too bad actually, since the humidity was low.

Then (after a shower and change) I went into the city for tonight’s university lecture on image processing. Tonight the lecturer discussed deep learning techniques and demonstrated several on various image classification and recognition problems.

When I was getting on the train to go into the city, an old lady with a walker was getting off. So I stepped aside to let her get off first without crowding her, before I got on. When she got off she gave me a death stare and said in an offended/sarcastic voice, “Well thanks for helping me!” 😳 I totally would have helped her if she’d asked for any help. Otherwise I’m staying politely out of the way.

In the city I had Chinese noodles for dinner, at Chinese Noodle House. Not China Noodle House, nor Chinese Noodle Restaurant, which are other establishments within sight of Chinese Noodle House.

Trying paint colours

Today I went to the hardware store to get a couple of things: coat racks, which we’re going to mount on the wall of the bedroom to hang jackets and hats and things, and some small sample pots of paint to test different paint colours on the walls.

Because we’ve planning this repainting of the whole place, we’re also taking the chance to look at other ways of refreshing and reorganising things to improve the living space. We’ve been hanging jackets over the dining chairs, which is a bit annoying when either you want to sit or when guests come over. And we have a few random hat hooks in places, but we realised we can install a rack of hooks in a space in the bedroom and move all of that stuff into one location to make things neater.

When I got home, I cleaned a section of wall to prepare it for painting, and when it was dry I applied coats of two different colours. We’re going for a warm white shade, lighter than what we have on the walls at the moment, which are quite creamy. I also have different lighter shades for the skirting boards, which I’ll add tomorrow to see the full effect. I painted wall patches about a metre high from the floor and 40 centimetres wide, so we can see it over a significant area of the wall. It’ll all get covered up by the full repaint when that gets done in October. So until then we’ll live with odd patches of different colours.

I also worked on Darths & Droids a lot today. There’s forward planning to be done for the next bit, so I wanted to get ahead on it.

On TV I’ve been watching Archive 81 on Netflix, an 8-part series which is described as horror, but it’s really more of a mystery thriller with some vague supernatural elements. I’m six episodes in and it’s been really good.

Fate of the Fellowship

Friday was board games night with my friends. Five of us gathered at one guy’s place and we played a game of The Lord of the Rings: Fate of the Fellowship, a recently released new game, which is getting rave reviews. It’s a cooperative game in which the players play various members of the Fellowship or allies and try to complete three random mini-quests scattered across Middle-earth, followed by Frodo destroying The Ring.

Wth five players, each player gets dealt two random character cards to play. There are two cards that contain “inseparable” pairs of characters: Frodo and Sam, and Merry and Pippin. I was dealt Frodo and Sam, and also Arwen. Other players had Gandalf, Aragorn, Gimli, Legolas, Galadriel, Boromir, Faramir, and the “Merry & Pippin” combo.

The board is a map of Middle-earth, and the characters all start in sensible places: Frodo & Sam in The Shire, Arwen at Rivendell, Faramir at Minas Tirith, etc. Players take turns and take various actions such as moving, mustering troops, fighting orcs (the small red pieces on the board), or more abstractly converting cards in your hand into resource tokens. The cards and resources can be spent to enable certain other things and to pay penalties. For example, whenever Frodo & Sam move, they have to pay a “Stealth” card or token, otherwise they attract the Eye of Sauron. There are also 9 Nazgûl miniatures that move around, trying to hunt down Frodo.

The game is a mixture of:

Frodo & Sam trying to move across the map to Mount Doom without being discovered by Sauron or the Nazgûl.
Other characters mustering troops and fighting off orcs, to (a) prevent them from conquering haven sites such as Lórien, Helm’s Deep, Rivendell, The Shire, etc., and (b) to draw Sauron’s attention to the battle (and thus away from Frodo).

There are several actions available to help both of these, such as passing cards between characters who are in the same location, and various unique special abilities that each character has. After each player’s turn, the forces of evil have a turn, dictated by a randomised card deck. This involves them variously: adding orcs, moving orcs towards safe haven locations (to conquer them), moving Sauron’s eye, and moving Nazgûl as they hunt Frodo.

We played for about 2 hours and had a lot of fun, completing two of the three mini-quests, but ultimately we were unsuccessful, as the orcs conquered too many safe havens and overran Middle-earth before we could destroy The Ring. We realised as this began happening that we’d made a beginner mistake, underestimating how easy it was for the orcs to do that, and hadn’t fortified the havens with troops. Next time we play we’ll have a much better idea of the overall strategy.

Here are massed orcs pouring out of Mordor while Frodo and others are trying to walk in via the Stairs of Cirith Ungol:

While playing the game I had time between turns to draw a quick sketch of the game. There’s also an “Eye of Sauron” Barad-Dûr dice tower that overlooks the board ominously, which isn’t in the photos I took.

I’m not normally a fan of cooperative games. I’ve played many, and haven’t really found any that I’ve liked, other than Codenames Duet and Hanabi. I’ve tried and haven’t liked Pandemic, Spirit Island, The Crew, Forbidden Island, Magic Maze, 5-Minute Dungeon, one of the Marvel co-op card games, and a bunch of others. My friends tend to like them and keep buying them, but I generally dislike them all. But this Lord of the Rings game was a lot of fun.

Today I did a 7.5k run – phew! I didn’t manage to do any runs during the week, so I wanted to get some distance under my belt. The weather is starting to warm up into spring and I went just before lunch, so it was a little tougher than running in cooler weather.

After lunch my wife and I caught the ferry across to Balmain with Scully and walked around the shops there. My wife wanted to drop off some old fabric that she doesn’t plan to sew with any more at a charity sewing shop there. We donated two large bags of fabric, and the staff were very happy to see it all. We stopped at a Persian cafe for a drink and snacks. I’ve had baklava there before, but today I opted for a slightly less sugary chocolate and strawberry cake, which was good.

We caught the ferry back home and are having a relaxing evening.

Finishing off pinhole cameras

This morning I had two online critical thinking classes. Then after lunch I went to Wenona School to finish off building pinhole cameras with the students – which we began work on last Thursday. I cut out holes for the different sized lenses we had and got the girls to tape the lenses into place, and then add tracing paper as a screen for the projection. We ran out of tracing paper and had to use tissue paper for the last two which turned out to be not as good as it has more texture to it, making the image not as clear. I’m hoping they can replace it with tracing paper.

Here are photos of the resulting cameras:

The largest diameter lens is on the left, stepping down in size to the right. So the projected image should get darker from left to right. It’s a little bit obscured by the fact that boxes 1 and 4 have the tissue paper, which isn’t as translucent as the tracing paper. But overall the project worked really well!

The science head is going to try to get the boarding school girls to take photos of the moon over this weekend when we get a full moon, to use for the 3D stereo effect. Hopefully they can get that achieved properly.

I walked back home, and on the way I passed the shop that has 3D-printed D&D and gaming scenery. It’s always been closed when I’ve walked past before, but today it was open! And there was a guy inside painting scenery. So I popped in to have a look and chat to him. He was happy to have a chat and we talked for several minutes about miniature models and playing D&D. Turns out this guy is also running an Old School D&D game, using the Swords & Wizardry retroclone of the original 1974 D&D rules. So it was cool to swap some stories about our campaigns.

The weather was warm today, reaching 24°C, the warmest day since early May. On Monday the forecast is 27°C!

I got home and taught three more classes in the evening, and baked a sourdough loaf which I’d made earlier. Phew!

Desert island books

This morning the builder who does jobs around the apartment block came in to inspect our window sills. They’ve been water damaged over the years, being made of wood, and we discovered they can be replaced at the expense of the collective building maintenance fund, rather than us individually, so we’re going to have them replaced. The guy came in to confirm the damage and measure up the windows for new ones. We want the work completed before we get the place repainted at the end of October.

I had two individual classes today, one for the student doing basic science. We did a precipitation experiment, using epsom salts and washing soda, and went over states of matter and how they relate to molecular structure. The second one was essay writing, where the student and I went through a sample essay he wrote on zoo animals.

Then this evening I had three classes on the new critical thinking topic: Stranded on a Desert Island. One question I ask is the classic “What one book would you want with you?” Most of the kids opted for a survival manual, very practically. But I had one class where the answers were as follows:

A survival manual
Little Women
A big book, to use as a raft
Robinson Crusoe

I asked the last kid if he didn’t think Robinson Crusoe would be a bit depressing to read if stranded yourself, and he said no, it would be inspiring. Well, maybe, I guess.

Dental day

Today I wrote my class plan for the next week of critical thinking. The topic is “Stranded on a Desert Island”. I’ll be asking the kids questions about survival and rescue, both alone, and also as part of a group of strangers. One question will be asking them if a waterproof bag washes up with them with one book and piece of gear in it (other than a radio or anything else that would mean easy rescue), what book and gear would they choose.

While thinking about this, I casually browsed some survival books on the Internet, and I ran across this interesting looking one: The Book: The Ultimate Guide to Rebuilding a Civilization.

When I’d finished, I had to dash up to the dentist, for my regular dental hygiene and check-up appointment. And when I got there, guess what book was on the waiting room table:

The very book I’d been looking at online less than an hour before! So of course I had a good flip through it while waiting for my appointment. It does look very interesting, although not nearly as practical a survival guide as some others. It’s a lot more eclectic and fun than a useful guide.

The hygienist gave me a clean bill of health after cleaning my teeth, but the dentist took x-rays and suggested some work to fix an old filling that is starting to deteriorate, before it causes problems. I need to schedule that work in some time in the next few weeks.

After the appointment I went to my wife’s work and picked up Scully to bring her home for the afternoon. I did some comic writing, and then an online class this evening before relaxing for the night.

Another long run on a busy Monday

Monday… 4 critical thinking classes, up to 1pm. Then I had lunch, and then went for a run. I ran 7.5 km today, trying to keep up this new habit of doing longer than 5k at least once a week.

Then I had a shower, and it was almost time to head into town for my university teaching. I went in and tried a new place for dinner called Cheeky Bao, which does bao bun burgers, an interesting fusion of Asian and Western cuisine. I tried the Korean fried chicken burger, but only discovered after it arrived that this wasn’t one of the signature bao bun burgers – it came on a regular style bun. Oh well, it was still good.

The lecture tonight was on machine learning classification for image recognition. Pretty easy for me as the tutorial section was more a demo than questions for the students to work through, so I didn’t have to do as much interaction as usual.