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[personal profile] rebeccmeister
Fieldwork this morning was more bearable than yesterday. For one thing, more colonies were out foraging, so we added 4 colonies to our sample size from one of our two sites (overall target is 8 colonies per site; my general ambition is to add 2 colonies on any given morning, before the colonies shut down for the day).

For another thing, it was overcast, and temperatures today are more moderate than they have been, with a forecast high temperature of 97°F. So although it was decidedly humid, we didn't spontaneously combust so quickly.

And for a third thing, this field site is close to a Forest Service Recreation Area, so there was access to bathrooms with flush toilets and running water!

We've been seeing other cool insects, too: black death-feigning beetles, more ant species than I can identify, and some giant cactus beetles. One student briefly saw a scorpion, but it ran off too quickly for her to photograph it. I'm sure we'll find more. Hopefully I can bring the students out at night at some point so they can see the desert come to life (and maybe see a tarantula or two??).

If only writing manuscripts was as fun as running around in the desert, taking photographs and poking everything with a stick.
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[personal profile] rebeccmeister
Today has felt like a day of ups and downs. I managed to drag myself out of bed at o-dark thirty for a jog, which was all right. We had mixed success finding foraging leafcutter colonies this morning, and yesterday after a rather long battle I had to give up on any ideas of getting timelapse footage of the queens (in short, can't quite sort out settings on available webcams in Ubuntu and they may not have adequate resolution for filming ants anyway). But we're still in a good position overall in terms of research progress, so I can't lose sight of that.

Got news that George the cat got hurt somehow, and that made me instantly homesick, less for New York and more for S and the cats.

Yesterday morning, I went on a couple of walks in the neighborhood. There were lots of interesting things to see. Here's an example of one of the many stormwater retention systems built around here:

Tucson morning walk

There's still a TON of runoff after larger storms, which can take hours to fully subside. For example, here's the intersection near our accommodations, the night before my morning walk:

Ephemeral flooding

But back to the walk. This looked like an unusual growth form for a prickly pear-type cactus.
Tucson morning walk

I have really been appreciating being back among the desert sunrises.
Tucson morning walk

And I love the character and details of this older neighborhood.
Tucson morning walk

I had a letter to mail, so I also went over to the nearby post office, which turns out to be the Postal History Foundation Museum.
Arizona Postal History Museum

The building houses a historic post office that used to be located right along the border between Arizona and Mexico. The post office was put back into its shipping crates when the town folded because the trains passed through Bisbee instead. Eventually, it found its way to Tucson and got installed in the museum.
Arizona Postal History Museum

There were interactive and visual displays about how post offices work and the services they provided.
Arizona Postal History Museum

There were several ways to try out canceling pieces of mail.
Arizona Postal History Museum

There were also lots of other resources for people interested in stamp collecting and stamp history, too. Not a huge museum, but totally a fun spot to visit when wanting to find a post office! Apparently the working post office got added on because the museum and associated library wind up needing to mail out a lot of stuff all the time.

Anyway, there's a lot to enjoy in this neighborhood.

Flying Ant Day [status, work]

Jul. 13th, 2026 10:46 pm
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[personal profile] rebeccmeister
Every damn time, it still feels like a miracle, like winning the lottery.

Looked at the rainfall patterns last night. One of our usual roads only got about 0.25", not enough to trigger mating swarms. A second spot, however, looked like it had some potential. We had to go check, just in case.

One of my students spotted the swarm first; I was rather more focused on driving the car at that precise moment.

With the 3 of us collecting, we got around 320 queens. If we want to really rimshot our target sample size, we need closer to 600 queens in total. However, even with "just" 320 queens, we were busy the entire day, taking photos of each one, paintmarking them, housing them in our "standard" ant nests.

Midafternoon, it poured buckets here at our AirBnB. But it still hasn't rained enough yet at the second potential target site, so there's still potential to get even more queens.

Getting this first set, though, means we're very much in business for this whole field research trip. That is SUCH a relief.

...hilariously, our background noise while painting ants was episodes of the TV show Schitt's Creek, something I never would have watched otherwise. It was perfect for background noise.
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[personal profile] rebeccmeister
We have been developing a rather long list of fun and interesting destinations to visit while in Arizona. One of the destinations at the top of my personal list was the Tohono Chul Gardens. I can't remember for sure, but I think my aunt who lives in the Catalina Foothills had given Tohono Chul the thumbs up; I just haven't ever had the opportunity to check it out. Also, it's definitely within the Leafcutter Ant zone, so.

This was a morning for sleeping in, so then we got over to the gardens shortly after they opened at 7 am, while it was still cooler out. At Tohono Chul, there are planted gardens filled with art, and additional desert ground to explore depending on how far a person wants to walk. Also, the original house on the land has been turned into an art gallery, and there is a cafe space, too. My students really want to go back again next weekend, too, for a Monsoon Market and Chillin' at the Chul, an evening gathering with refreshing drinks.

photos beneath the cut... )
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[personal profile] rebeccmeister
Last night [personal profile] slydevil was asking about my whereabouts, because it wasn't clear to him whether I was still in Montreal or elsewhere? So, a timeline, because this has, indeed, been a complex summer:

June 13-18 were the Montreal expedition. Then I was back in Albany for about a week, going on an entertaining little sailing adventure with [personal profile] scrottie and also attending a rowing friend's wedding, and enjoying time with our former rowing head coach, who came to town for the wedding and to deliver one last round of rowing wisdom (he semi-retired to Chicago). On June 28, I set out driving to Tucson, by way of Iowa, Denver, and Grand Junction, CO.

I don't know if I'll get to posting the photos from the sailing adventure, but they're on Flickr, at least. Oh, and there was another bike valet in there, too. The garden has been busy, especially the volunteer hollyhocks. Our rowing coach said, "If you do the workout, God bless you. If you do not do the workout, God bless you anyway."

We formed an Oar Honor Guard for the wedding, after I biked the oars over to the reception party. I was very pleased with how the oar decorations went, and with the Fancy Hat a teammate loaned to me!

Then I loaded the car up to the gills and set out driving, with some motel nights, some camping nights, and some nights staying with folks, including [personal profile] threemeninaboat and Smellsofbikes, who fed me yummy peaches and shishito peppers, showed me their projects, took me to the Arvada Sculpture Garden, and let me try out the hurdy-gurdy!

Colleagues in Grand Junction, CO, talked ants and science and teaching and mentoring, and showed me their stunning wildflower garden they've been curating and developing for the past 30 years. They also recommended an awesome canyon driving route to Moab, which I followed with an amazing, barely-photographed drive through the Salt River Canyon enroute to Tucson (Salt River Canyon was super windy! Can't photograph and drive at the same time so I prioritized driving!).

In Tucson, I've been finding favorite foods that are hard to get elsewhere, visiting local art, and chasing after ants - the main focus for this month.

And, whew. I think that catches things up for now.

Early, smaller rains [status, work]

Jul. 9th, 2026 07:27 pm
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[personal profile] rebeccmeister
It rained again yesterday, a bit more heavily in spots, but not quite the right spots yet.

I suspect the leafcutters are paying attention to the ambient humidity, though. We found two very enthusiastically foraging colonies this morning, which brings us up to 4 out of the 10 total that seems like a decent sample size to work with. (might go up to 11, though, because we barely got 30 foragers from the second colony)

No signs of any queens yet. More rain in the upcoming forecast.
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[personal profile] rebeccmeister
We're generally getting ourselves settled into a routine here. It's a bit funny and strange to be in Tucson, where I know hardly anyone, as compared to Tempe, where I wind up feeling like I know far too many people and have to deliberately carve out time and space for focus work. Here, I am more concerned about my research students feeling socially isolated, all in the middle of a big city. I have some ideas for addressing that, at least - we could see if the local yarn shop has knitting/crochet groups, for instance.

Anyway, for me the basic routine is looking like: up at 4 am, go for a jog/walk, drink coffee, head out to the field very shortly after sunrise to look for foraging ants for a couple hours. Return, eat breakfast, work on computer-based research tasks until lunch. After lunch, process any collected ants and leaves, then dinner and early bedtime for me.

We had the beginnings of monsoon weather last night, which dropped rain on outlying areas but not yet the places where it matters most to me. If we get real rain, that will blow any notions of a routine right out of the water, because we'll need to prioritize work with any queens we can get, and that's always a major race against the clock.
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[personal profile] rebeccmeister
(with a nod to Yogi Berra because that one's a favorite)

It's always a little funny to travel to a different place and thereby be confronted by one's self. Arriving here in Tucson, I had something of a flurry of little to-do list items, like visiting every possible different food source location to stock up on miscellaneous groceries.

Some of the items couldn't get tackled until today, in the heat of the day. First, I took my bike over to a local bike shop to see if they can fix the bad wheel truing job I did on my rear wheel (it has an annoying hop). I really should have told them to go ahead and do a proper headset adjustment for me, but my brain might have been a little baked.

Bikeless, I walked over to a credit union to do a shared branching check deposit. Then I walked home.

Kind of hot out there.

The advantage of walking is it's easier to look at stuff, as compared to biking around. Behold, an old church:
Church

The disadvantage of walking, of course, is that it's stupidly hot out there. Every little patch of shade matters.

This sign was reminiscent of a sculpture in that Arvada sculpture garden, except it just had one message:
READ

(The Arvada one:)
Arvada Center Sculpture Field

Interesting train underpass along Stone Ave. Lots of signs to indicate this underpass floods regularly. Not right now, of course. It's quite dry currently. That's making it harder to find leafcutter ant colonies, but we'll keep at it.
Stone Underpass

Tucson has some phenomenal murals, like this one, which was tricky to photograph:
Mural

Yes, that's a javelina, tortoise, and hare riding bikes in the back.

When we're not out hunting for ants, I'm gradually managing to convince myself to work on the various projects I've brought along. I did not try to bring along the bike parts chandelier; instead, I have a knitting project to work on, and some books to read, and some manuscript-writing projects that I definitely need to tackle.

It is really nice to have a kitchen right here, so I can easily get a drink from the fridge and make myself a fresh lunch on the spot. We have to do a lot of driving to and from the field sites, though.
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[personal profile] rebeccmeister
Yesterday a research student and I ventured over to Sabino Canyon to wander around and scope out the leafcutter ant situation there. We got underway by midmorning, when things were already heating up, and saw no evidence whatsoever of leafcutter ants. Quite dry there right now.

This morning, we got up at 5 am and made it over to another nearby site by 6:30, when it was only 82°F. Success! Our first colony for this year's projects. We collected up around 150 foragers returning to the nest carrying various things, but by 7:45 things were already slowing down and it was time to call it quits.

I'm going to push our wake-up time 30 minutes earlier for tomorrow morning. We're going to have to adopt a hot country schedule: up and active early, midday siesta, hunker down indoors for indoors projects later in the day.

I finally ordered new running shoes for myself. I might have to get up even earlier to fit in a morning jog before it's absurdly hot. I need to do *something* to stay active.

I also need to budget time for thinking work. My second research student arrives tomorrow; once they're both here I might tell them I'm cutting them both loose at a certain point in the afternoon to go exploring/etc. There are lots of things within walking distance here, and we're also assembling a list of other places to check out: Saguaro National Park, Sonoran Desert Museum, Mt. Lemmon, Tohono Chul Botanical Gardens, ...

I probably also need to think of indoor destinations. Or maybe we should find caves to visit.

My blog has moved

Jul. 6th, 2026 02:01 am
[personal profile] mjg59
A reminder that I am no longer here, but am instead here. The new RSS feed is here. If you're still reading this for some reason other than being on Dreamwidth, please update your feed.
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Well, technically, this was the day of our return to Albany by train. There are two major amusements to note. No, make that three:

1. [personal profile] annikusrex found us a delightful bakery for breakfast, La Cave a Manger Boulangerie, in a cellar in the Bonsecours Market in Vieux-Montréal:

Breakfast

The bathroom art was highly entertaining.
Bathroom scene

I observed, but did not buy, this souvenir t-shirt with a bicycle on it.
Souvenir shop

2. Then it was time to pack up and head for the train:
Preparing to depart

There was just one minor complication, in that the good weather we'd enjoyed for basically the entire ride finally gave out. It was raining, and the thought of trying to navigate to the Gare Centrale didn't cross our minds until it was far too late.

It's hard to tell from the photo, but our luggage, which stayed mostly dry, is surrounded by puddles of water. We were drenched. It was enough of a sight that a station manager called over a cleanup crew to mop all around us. It took most of the train trip back for us to dry out again.

Here are the bridges we crossed, viewed from afar on the train:
Leaving Montreal by train

A sailboat out enjoying Lake Champlain:
Lake Champlain from the train

And,

3. At some point, Amtrak added a curried chickpea wrap to their menu! Between that and the beer, I was in train heaven.

Train dinner

The wraps were so good and the train ride long enough that I had two.

As usual, the views from the train were splendid.
Return train views

Return train views

Return train views

Soon enough, our adventure came to an end.
Caboose view on the return train

It was a fantastic journey, through and through. One I'd gladly repeat. And yet - there are so many other options for adventures close at hand! So long as I can find excuses to shirk work and partake in them.
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[personal profile] rebeccmeister
How civilized, to wake up in a space where I could just walk over to the kitchenette, brew a cup of coffee, sit in a chair at a table, and write out a few thoughts.

Jotting some thoughts

Something dampened my joy, however. In all of my planning for biking up to Montréal and then taking the train back down to Albany, there was one concerning missing link: how to get my bicycle back to Albany with me.

the adventures of the day... )
[syndicated profile] atariprojects_feed

Posted by moorejh

Task: Learn About Scanlines Using PEEK in Atari BASIC

Needed: Atari BASIC

Time: 5-10 minutes

Introduction

The Atari 8-bit computers generate the video display one horizontal line at a time, starting at the top of the screen and progressing to the bottom approximately 60 times per second on NTSC systems (50 times per second on PAL systems). This rapid refresh creates the illusion of a stable, continuously displayed image.

The Atari video system is a collaboration between two custom chips. ANTIC reads the display list and screen memory to determine what graphics should appear on each line, while GTIA converts that information into the final color video signal sent to the monitor or television. As the electron beam (or the equivalent process in a modern display) moves down the screen, the operating system continuously updates a hardware register containing the current scan line number. This is essential for timing in assembly language programs where may you need to execute code during the horizontal and vertical blanks when the beam is moving to the next line or the top of the screen to start over.

In this project, we’ll use a simple PEEK command at address 54283 in Atari BASIC to read the current scan line in real time. Watching this value change reveals how the Atari constructs each video frame and provides a foundation for more advanced programming techniques such as display list interrupts (DLIs).

Note that PEEK(54283) returns the vertical line counter value which corresponds to a value from 0 to 130 or 131 possible values. This is exactly half the 262 lines per TV frame for NTSC displays. The values range from 0 to 155 for PAL. You can read about this address at The Atari Memory Map. The reason for the half approximation of the 262 scanlines is that the number 262 is too big to fit into an 8-bit byte which can store numbers from 0 to 255.

Instructions

Here is a simple BASIC program to PEEK and see what approximate scanline (accurate to two scanlines) the Atari is drawing when the command is executed. Remember, the entire screen is drawn 60 times per second, so this happens really fast.

10 REM Returns scanlines 1 to 262 (NTSC)
20 PRINT ((PEEK(54283)+1)*2)
30 FOR I=1 to 200:NEXT I
40 GOTO 10

Simple program to read the current scanline
Simple program to read the current approximate scanline

Comments

Programming in assembly language on the Atari 2600 requires counting scanlines and keeping track of which pixel is being drawn. This is because the CPU actually draws the screen due a lack of a GPU on the 2600. Programmers need to wait until the scanline is done to execute game code during the horizontal blank and later the vertical blank.

 

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I did manage to get around 140 photos uploaded and annotated just now.

This morning I hopped on Frodo to run errands over to a credit union and then to Food City. Alas, this Food City did not have the magical, nostalgic Salsa Roja Molcajete, so that quest will have to continue. But they did have yummy Latinx cheeses and also Salsa Lizano!! And an horchata mix with all real ingredients (probably mostly sugar, but still!). If the horchata mix is any good I'll be running back to buy more. Arizona summers call for good refrescos.

It felt really good to ride a bike, albeit at a casual pace, stopping often to check maps.

It hasn't rained recently in Tucson, but the Santa Cruz River still had some liquid water in it:
Out & About in Tucson

I'm taking that as a good omen for our leafcutter research.

I paid a brief visit to the Bike Cathedral on my way home.

Out & About in Tucson

Shortly thereafter I also went down to the closest Goodwill, which appears to be one of the very well-stocked Goodwills, and found a Brita pitcher for cold fridge water here. The tap water itself tastes fine to me, so the pitcher doesn't have a filter in it, but I'll add one if it helps ensure my students stay hydrated. Plus also to Antigone Books for a research notebook, and Food Conspiracy for other groceries and bulk items. It is amazing to be within walking distance of Food Conspiracy, one of the things that makes Tucson vastly superior to Tempe, except in the matter of rowing.

Also amazing to be within walking distance of Time Market, where I found not one but TWO favorite hard-to-find things, big bottles of Marie Sharp's, and flageolet beans!!

Out & About in Tucson

I will probably wind up going back to buy a second big bottle of the Marie Sharp's. One cannot have too much, particularly living in upstate New York.

A person could easily spend far too much time drinking capuccinos and eating delicious pastries and pizza at Time Market (to say nothing of the booze selection!). Here's a leftover slice of a fig and balsamic and goat cheese pizza, with arugula:

Out & About in Tucson

Also, a quick look at where we're staying. This house has a funny layout that I can't quite make sense of, but the funny layout is probably in part because of when the house was built (1906, the early days for Tucson).

The front door opens to this living room; the fireplace is no longer safe to use, so it's the perfect spot to store Frodo.
Out & About in Tucson

A partial wall separates the kitchen from the living room:
Out & About in Tucson

And the bedroom I'm occupying is right off the kitchen:
Out & About in Tucson

Meanwhile, the dining room is deep in the middle of the house, with the bathroom behind it, and an Arizona room / walled porch to the left:
Out & About in Tucson

The dining room is probably going to be the ant room for us.

There's another bedroom to the right of the dining room entry, behind the living room/fireplace.

I think what's most intriguing to me is there are no hallways.

With the house being old and on the corner of two busy streets, it seems all the windows are painted closed. They seem to still be single-pane, so there's good reason to continue keeping all of the blinds closed, too. At least there are ceiling fans in every room, a necessity out here (central air also).
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