Catch up on stories from the past week (and beyond) at the Slashdot story archive

 



Forgot your password?
typodupeerror
×

Comment Re:Faulty machine or contaminated samples (Score 4, Informative) 45

Or microplastics are so small they permeate almost everywhere like a dye in water or smoke in air. Saying they found microplastics in lower levels of sediment in a lake just means they are highly mobile and aren't limited to a single layer like larger particles.

If microplastics are being carried globally in the high atmosphere, there aren't many places on earth where they won't show up eventually.

Comment Re:So bulky (Score 2) 21

If they can project a field of 45,700 dots through a photonic crystal surface-emitting laser (PCSEL) almost like LIDAR, it might open the door to on-phone 3-D photogrammetry.

Right now the best way to 3-D scan an object is to take approximately 100 photos around the object with something like the KIRI app or the equivalent on an Android phone. Not needing a cloud service to process your 100-photo set would be a huge benefit.

Also, if you see an area that is under scanned or has a hole in the data, it should be relatively easy to rescan that area and add it to the cloud-point model already in the phone. I would love to have a built-in 3-D scanning feature in my phone that I could then export. Imagine scanning a broken part and slicing and printing a replacement with minimal CAD tweaking.

Comment Re: Humans also train on this material.. (Score 1) 97

If ai reads it, the probability of it using it is 1.0.

Not really. The AI is using the data to strengthen relationships between ideas. If the only thing the training strengthens from reading your site is "dogs wag their tails when happy" or "climate change is increasing" then not much is retained. If your site is the only one talking about the breakthrough in perovskite photovoltaic efficiency, then yes, your data is probably going to be a singular node and regurgitated more directly.

 

Comment Re:Hot water and electricity simultaneously (Score 2) 123

I came here to say the same thing. Cooling the PV cells makes them more efficient, just like water cooling your CPU/GPU helps keep them in their optimum temperature range.

Actually, the best time to cool the PV cells is when the sun is at its strongest, so summer would actually be the best boost for the cells efficiency. In the winter, if the sun is less strong or the temperature falls below freezing, you automatically divert and drain the system until it is beneficial again.

https://link.springer.com/arti...

Comment Re:Why would anyone disagree? (Score 4, Interesting) 47

Example: I'm a suspect in a murder trial. They found titanium dioxide on the murder weapon and I was apprehended wearing white sun screen. If this becomes a law, I can subpoena the source code and algorithms for the mass spectrometer and x-ray fluorescence machines used to identify the titanium dioxide.

The prosecutors would need to contact the manufacturers of the test equipment, negotiate a release of the source code and algorithms used by the devices, and provide it to the defense team. Every piece of equipment used by the forensics team would have to have a point of contact at the manufacturer to handle these requests. If the manufacturer does not agree to release than information (trade secrets) does that mean the forensics team cannot use that equipment any more?

While having access to the source code and algorithms sounds good on paper, in real life it would just give those trying to game the justice system another tool to confuse and drag out criminal proceedings.

Comment Re:Space Force? (Score 1) 11

It doesn't have to be an entire military branch. It could have been Special Ops Command, Southern Command, Eglin AFB personnel, soldiers deployed on ships in the middle east, Army Contracting Command, Air Combat Command, etc.

There are plenty of commands and units that could combine to make up the 20,000 individuals that were affected.

Comment Re:If it's not fair use (Score 2) 64

Do you violate copyright every time you remember a fact you learned from a book in school? Does watching Bob Ross videos mean every landscape painting you create violate copyright? Does visualizing the periodic table of elements in your head mean you're violating the copyright of the creator of the poster you remember?

Copyright means you cannot take the original and reproduce it exactly. Using it for derivative works is allowed, otherwise the first person to draw a horse would claim copyright for all horse images. Using a book to learn the style of an artist (Sarah Silverman, George Carlin, Arnold Schwarzenegger) and creating new works that resemble something the artist might say, or emulating their cadence and timing, should be allowed as long as the work is not pretending to be originals by them.

The fact that ChatGPT read the books and learned something from them does not mean the ideas or concepts are copyrighted.

TL;DR
Learning - good
Plagiarizing - bad

Comment Re:So those comics were right? (Score 2) 76

Interesting. I didn't know about the benefits of low radiation on the immune system. Here is an article from the National Institute of Health explaining the benefits and levels associated with very low levels of radiation. For example, the paper suggests that radon might not be the evil substance we thought and that low levels might actually be associated with lower cancer rates.

https://www.ncbi.nlm.nih.gov/p...

Note: The 10 cGy used so often in the paper equates to about 1 Joule of energy absorbed by 10 kilograms of tissue.

Comment Re: Some states did that in the 1980s. (Score 2) 202

I wonder, did this bill extend school hours to accommodate the new topic, and if not, what class will be dropped to accommodate this forward-thinking new graduation requirement?

Back when I was in HS there were a few class periods each semester that could be filled with "electives". I'm guessing the CS courses could be added to the student's senior year and let them select fewer elective courses. No dropped classes needed if electives are still an available option.

Comment Progress is small steps (Score 4, Insightful) 61

I'm glad to see continuous small steps forward in fusion energy, just like the small steps necessary for the development of fission reactors. No, fusion hasn't reached the stage where the energy produced will be self sustaining yet, but forward progress is progress.

Congrats to the JET team!

Comment Re:Way to go, Just Stop Oil (Score 4, Interesting) 179

I see Plug-in Hybrid Electric Vehicles as a temporary step to allay the worries of "range anxiety" that new EV owners are experiencing. The scarcity of fast chargers on ALL long-distance routes has people worried that an example trip from Portland to Denver might be a series of short drives with plans and back up plans of where to charge, how to handle construction delays, overcrowded charging locations, and cold weather performance degradation.

I think that once there is a robust charging network from coast to coast on every highway and back road, the PHEV will slowly decline in popularity. Why have a PHEV when you can't buy gasoline in the city unless you find a fleet station or a long-haul truck stop. I don't think PHEVs will be that popular for much longer than about 10 years and people get comfortable with BEV cars for daily use and possible viewing a rental ICE car for longer trips and driving vacations.

Comment Re:The moon is always receiving sunlight (Score 1) 12

No. As you mentioned, one side of the moon is tidal locked to always face the earth and it takes 28 days to revolve around the earth. This means the moon's "day" is 28 earth days long. When we see a "full moon", the side facing the earth is in daylight. A week later the moon revolves and we see a waning moon - half in sunlight, half not in sunlight. It is not in shadow from anything just like the night side of the earth is not in shadow from anything (except itself).

A week later the moon revolves so it is closer to the sun and the far side is entirely in sunlight. Another week and we get a waxing moon (new moon). The final week brings us back to another full moon. So if you stood almost anywhere on the moon (not the poles) you would have 14 days of sunlight then 14 days of no sunlight.

https://www.youtube.com/watch?...

(After watching the video, I realized things look slightly different in the southern hemisphere. I hadn't thought about that viewpoint before.)

Slashdot Top Deals

For God's sake, stop researching for a while and begin to think!

Working...