dbcurtis · HackerTrans

8 hari yang laludiscuss

Almost true. For many plants, a hybrid is naturally unstable, and can often be stabilized with one extra cross. (But isn't, as it serves as intellectual property protection for the seed company.) But some plants, soy beans being a biggest cash-crop example, can not be bred to be unstable. (See my comment above about Monsanto Roundup-Ready beans.)

dbcurtis

8 hari yang laludiscuss

Well, as an Iowa farm boy (and farm land owner) I have a more nuanced view. There have been hybrid maizes for many decades. It is possible to create unstable hybrids of normal field corns, which serves as a form of intellectual property protection for seed companies. As a farmer, you certainly can go out and plant heirloom varieties that can self-reproduce if you so choose. At which point, the choice of buying hybrid seed versus planting an heirloom variety is a simple business decision. Now with soy beans, on the other hand, it is not possible to create an unstable hybrid. Even hybrid soy beans can be saved and planted. Which is the direct root of the insanity around Monsanto's Roundup-Ready hybrid seed licensing scheme, and all the notorious law suits around that. We would be better off if Monsanto could sell an unstable soy hybrid. That would eliminate all the craziness that the licensing system creates.

dbcurtis

19 hari yang laludiscuss

My kiddo has perfect pitch, and for them listening to a baroque period organ is kind of trippy because back in those days A was more like 436 Hz than 440. OTOH, absolute pitch means that learning a fiddle tune by ear takes only a couple of choruses. These days, they are grooving on Angine de Poitrine, so somehow they are OK with microtonal scales. It probably varies from person to person, but I can see where perfect pitch could give you another way to be annoyed by the world.

dbcurtis

26 hari yang laludiscuss

> Alzheimer’s is driven by the buildup of toxic proteins called amyloid-beta.

Isn't the current thinking that amyloid-beta buildup is a marker, not a cause? The therapy may be working here, but it isn't clear whether clearing amyloid-beta proteins is the mechanism or an outcome.

dbcurtis

2 bulan yang laludiscuss

It was part of the culture in the 1960's, and only started to change somewhat during the 1970's. Everybody had ash trays, even in non-smoking households, so that you could bring them out for guests. Nobody gave it a second thought. Clay ash trays were common elementary school arts & crafts projects.

One of the things that reminded me of how much a part of the culture it was, is when we visited the Computer History Museum. The SAGE system display had several operator consoles -- each with an ash tray and an automotive-type cigarette lighter in the panel.

dbcurtis

2 bulan yang laludiscuss

Do we know if the pilots are OK? Yes, ejection can save your life, but even in a best-case scenario the forces on the human body are incredibly ugly. I know a former combat-rated RAF pilot that had to eject from a Harrier because of a low-altitude bird strike. After 6 months in the infirmary, he emerged 2cm shorter, combat rating gone forever.

dbcurtis

2 bulan yang laludiscuss

> Which CAD program? I'm confused

Clue here: > Our proposed GenCAD architecture...

So, at this point, it seems like this will work with all CAD programs, since they have yet to encounter any systems that they can't work with. More seriously, my guess would be whatever one is available for free in their lab. Kind of standard operating procedure for academic projects -- do a proof of concept, make a video that avoids known bugs, get a grade, push source to git, graduate. Good ideas come out of that... production code... eh... maybe.

More likely someone ends up in the situation that my kid did, previous graduate student's git repo is stale by 2 versions of C++, and 4 versions of ROS, and neither of the two unit tests still work after porting.

dbcurtis

2 bulan yang laludiscuss

No. I got it set for distance vision. There are modern implants that are "multi-focal". But they work by spreading out the light, so everything is less bright at any distance. My two pieces of anecdata are: 1. A friend with multi-focal implants says that he needs a very bright light for reading now. Which is one of the reasons I avoided multi-focal. 2. My optometrist got multi-focal, and he noted that it required retraining his brain somewhat, because now instead of accommodation providing focus, focus requires mental attention to the subject of interest.

Cataract implant technology is moving very fast, and my data is about 5 years old, so YMMV.

dbcurtis

2 bulan yang laludiscuss

It seems to me there is a broad range of "normal", as in well within the standard spec sheet tolerances for humans. It is more about what is average or median.

dbcurtis

2 bulan yang laludiscuss

Who else tried with both eyes? A few years ago I had an implant to treat cataracts. It was notable at the time that the "new" eye was less yellow-tinted than the aged-in-place eye. I was told that the lens does yellow with age. Over time, my brain mostly adjusted, but on this test I did notice a subtle hue difference between eyes. Did anyone else try that experiment?

dbcurtis

3 bulan yang laludiscuss

> Rarely(never?) have I found new knowledge on youtube, however its a great source of joy/emotions/slop.

I suspect you are not looking very hard. I have learned a tremendous amount about everything from stone cutting to metalworking to welding to Kalman filters to linear algebra. There is a lot out there. The main annoyance I have is keeping AI slop out of my feed so that I can instead learn from genuine experts. There is a huge amount out there.

dbcurtis

3 bulan yang laludiscuss

The burning question is whether or not it qualifies as a new DXCC entity.

dbcurtis

3 bulan yang laludiscuss

? No, you need to educate yourself.

The gestation period of a cow is approximately 9 months, similar to humans, by coincidence. Only a cow that has given birth to a calf will produce milk. The normal lactation period is 305 days before the cow is "dried up" before giving birth again. 10,000 pounds of milk is considered a good lactation total. Typically, cows are bred to calve once per year. Typically going through 10 lactations before that one way trip to MacDonald's.

Dairy bulls are notoriously nasty creatures, so artificial insemination is almost universal in the dairy industry. The "tract" that you speak of is the cow's colon. The technician is careful to guide the pipette so as not to injure the animal, and the colon provides convenient access to feel what is going on inside.

If you are squeamish about such things as cow's colons, then vet school is not for you.

dbcurtis

3 bulan yang laludiscuss

That will vary by person. My father-in-law bred and milked pedigreed Holsteins. They had a 1 gallon pasteurizer and would just dip a gallon out of the bulk tank for household use when needed. So, most of the time they had pasteurized, non-homogenized. On occasion, the pasteurizer would break, so for a while they would drink raw milk. But of course understood the risk, and also knew darn well where the milk had come from and how clean the milking facility was.

dbcurtis

3 bulan yang laludiscuss

The thing about LR parsers is that since it is parsing bottom-up, you have no idea what larger syntactic structure is being built, so error recovery is ugly, and giving the user a sensible error message is a fool’s errand.

In the end, all the hard work in a compiler is in the back-end optimization phases. Put your mental energy there.

dbcurtis

3 bulan yang laludiscuss

I was just going into the second quarter of compiler design when the dragon book came out. My copy was still literally “hot of the press” — still warm from the ink baking ovens. It was worlds better that anything else available at the time.

dbcurtis

3 bulan yang laludiscuss

It seems to me that compared to your phone, a power brick dangling off a charging cable is much more likely to slip off your lap unnoticed and get wedged in the seat hinge only to get subsequently punctured.

I recently took a flight where I had a laptop, my phone, a power brick, a new power brick for my wife, a second phone (for reasons) and a battery for a piece of ham radio equipment in my backpack. As I got on the plane, I was thinking I was probably one of the risker passengers on board :) Anyway, when I use the brick, I keep it zipped in a jacket pocket with just the charing cable coming out in an effort to keep it from finding its way to a place that it shouldn't.

dbcurtis

4 bulan yang laludiscuss

he he... is that the equivalent of when I was a kid we differentiated by "drive-in", "paper-napkin restaurant" and "cloth-napkin restaurant" in order of how much trouble you would be in if you embarrassed your parents.

dbcurtis

5 bulan yang laludiscuss

It is easy to underestimate how much one relies on senses other than vision. You hear many kinds of noises that indicate road surface, traffic, etc. You feel road surface imperfections telegraphed through the steering wheel. You feel accelerations in your butt, and conclude loss of traction from response of the accelerator and motion of the vehicle. Secondly, the human eye has much more dynamic range than any camera. And is mounted on an exquisite PTZ platform. Then turning to the model -- you are classifying obstacles and agents at a furious rate, and making predictions about the behavior of the agents. So, in part I agree that the models need work, but the models need to be fed, and IMHO computer vision is not a sufficient sensor feed.

Consider an exhaust condensation cloud coming from a vehicle's tail pipe -- it could be opaque to a camera/computer-vision system. Can you model your way out of that? Or is it also useful to do sensor fusion of vision data with radar data (cloud is transparent) and others like lidar, etc. A multi-modal sensor feed is going to simplify the model, which in the end translates into compute load.

dbcurtis

5 bulan yang laludiscuss

No, I don't think that will be successful. Consider a day where the temperature and humidity is just right to make tail pipe exhaust form dense fog clouds. That will be opaque or nearly so to a camera, transparent to a radar, and I would assume something in between to a lidar. Multi-modal sensor fusion is always going to be more reliable at classifying some kinds of challenging scene segments. It doesn't take long to imagine many other scenarios where fusing the returns of multiple sensors is going to greatly increase classification accuracy.

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