krellor

Hey, sorry it took so long to see your question. Here is a paper (PDF) on the subject with diagrams.

https://www.research-collection.ethz.ch/bitstream/handle/20.500.11850/42365/eth-4572-01.pdf

The link is composed of two parts, the emitter and the receiver. The emitter captures the LF signal and up-converts it to 2.5 GHz. The obtained 2.5 GHz signal is then amplified and transmitted over the air. The receiver part of the link receives this signal and down-converts it to obtain the original LF signal. This LF signal is then amplified again and sent to a loop LF antenna which reproduces the signal that was emitted by the car in its integrity.

Edit: and here is a times article that covers the problem in one area. https://www.nytimes.com/2024/02/24/world/canada/toronto-car-theft-epidemic.html

Yeah. Shockingly people store things where it is convenient to have them. :) I’m glad I didn’t have a keyless system to with about.

I did read the article. I’m unfamiliar with the “hacking” tools or methods they mention given they use terms like emulator. I was simply sharing one wireless attack that is common in certain areas and why.

I think most of the wireless attacks aren’t trying to be so sophisticated. They target cars parked at home and use a relay attack that uses a repeater antenna to rebroadcast the signal from the car to the fob inside and vice versa, tricking the car into thinking the fob is nearby. Canada has seen a large spike in this kind of attack. Faraday pouches that you put the fob inside of at home mitigates the attack.

I’m not sure about what the article is referencing, which is probably a little more exotic, but relay attacks are very common against keyless cars. Keyless cars are constantly pinging for their matching fob. A relay attack just involves a repeater antenna held outside the car that repeats the signal between the car and the fob inside the house. Since many people leave the fob near the front of the house, it works and allows thieves to enter and start the car. Canada has has a big problem with car thieves using relay attacks to then drive cars into shipping containers and then sell them overseas.

With coffee all things heart palpations are possible. It took me about a year and a half between work and studies. Definitely not a day. 😀

That’s awesome, but no, they made something far more useful, lol. I’m glad to see projects like that though; it’s a lost art!

Years and years ago I built my own 16 bit computer from the nand gates up. ALU, etc, all built from scratch. Wrote the assembler, then wrote a compiler for a lightweight object oriented language. Built the OS, network stack, etc. At the end of the day I had a really neat, absolutely useless computer. The knowledge was what I wanted, not a usable computer.

Building something actually useful, and modern takes so much more work. I could never even make a dent in the hour, max, I have a day outside of work and family. Plus, I worked in technology for 25 years, ended as director of engineering before fully leaving tech behind and taking a leadership position.

I’ve done so much tech work. I’m ready to spend my down time in nature, and watching birds, and skiing.

I need to start using old batteries in my bathroom scale.

Some suggestions, either online or local;

Bookclubs
Walking groups
Chess, board games, table top
Theater groups (meetup groups to go to the theater as a group)
Escape room group meetups.

Depending on if you are in a city or a smaller town the locals options will vary. I’d look at meetups site and browse local activities. For most any activity you will find a range of ages, but some will skew more one way than another.

Best of luck!

The article says that steam showing a notice on snap installs that it isn’t an official package and to report errors to snap would be extreme. But that seems pretty reasonable to me, especially since the small package doesn’t include that in its own description. Is there any reason why that would be considered extreme, in the face of higher than normal error rates with the package, and lack of appropriate package description?

Thanks for the article, it was a fun read. I’ll have to go back and re-read the majority opinion because I do remember some interesting analysis on it even if I disagree with the outcome.

While not related from a legal standpoint, the use of iPhones and intermediate devices reminds me of a supreme Court case that I wrote a brief about. The crux of it was a steaming service that operated large arrays of micro antenna to pick up over the air content and offer it as streaming services to customers. They uniquely associated individual customers with streams from individual antenna so they could argue that they were not copying the material but merely transmitting it.

I forget the details, but ultimately I believe they lost. It was an interesting case.

The one thing I’ll say as someone with years of management and leadership experience, is that these posts always ignore what the people want. I’ve coached many employees, and I always start with asking what they want to achieve. Some people are really career focused and want to climb the ladder. Others are happy putting in their 40 hours and making modest progression from entry to junior, and maybe senior eventually.

If someone wants to climb the ladder, or became an industry expert, or make the very top of the range, then yes, that’s going to involve some grind. But some people just want to have a comfortable life while doing their fair share during their 40 hours a week. And there is nothing wrong with either approach.

Telling all young people to grind 80 hours a week, ignoring what they want to achieve, or if they are even likely to succeed in their goal, is management malpractice. But I digress.

That makes sense, I honestly wasn’t thinking in terms of the comment on the meme. Thanks for the clarification and have a great day!

I don’t know that I follow your illustration, but let me try an alternate explanation for my point.

One way pi appears is by taking the perimeter of the great pyramid and dividing by its height to get 2Pi. We can write this as

4L/h ~= 2Pi
2L/Pi ~= h

The great pyramid has a height of 280 cubits, and a base of 440. From this, using right triangles and Pythagorean identities we can find the long side and all angles.

Specifically, we look at the slope of the outer face, which we can express as rise over run. In our case, 280/220 = 1.27 or as 51.843 degrees.

As long as that ratio of rise over run holds you will preserve the above ratio with pi. You can fix that slope and vary either the base or the height, and the other value is predetermined. So how did the rise and run ratio come up? Not every pyramid had this relationship, and there is an infinite number of unit length combinations that wouldn’t give rise to this ratio.

So let’s look at the old units, in particular, the palm.

1 palm = 4 digits.
4 palms = 16 digits.
5 palms = 20 digits.

If for every 5 palms up, the block is 4 palms deep, you get the ratio of 1.25.

That gets us within the 4% agreement with our starting ratio.

Again, you could choose a unit length, and have the rise be 3 up for every 2 palms deep, and you now wouldn’t have this ratio. There are an infinite number of ways to construct a pyramid with a unit measure that doesn’t.

I hope that makes sense. Have a good day.

You are right, maybe, in that people are simplifying it too much.

Pi is the ratio of the circumference of a circle to its radius. Measure out lengths using a unit circle and your lengths will be a multiple of the circumference of the wheel used.

But what does it mean that pi pops up in pyramid construction? I think they mean it is the perimeter divided by the height of the great pyramid, which is 2pi. But how would measuring the perimeter in wheels cause that to just fall out? It wouldn’t. That would depend on the slope of the sides.

So where did pi come from? From the ratio of their standard units of measure, cubits, palms, and fingers most likely. They would have measured “rise over run” using standard units of measure. Most pyramids slopes end up being a ratio of these units, but not all of them approximate pi.

Source: my recollection from my math history courses for my undergrad math degree.

Yeah, this is one of those situations I have mixed feelings on. On the one hand, in a perfect world what consenting adults do on their own time wouldn’t change perceptions of their competency or leadership.

Unfortunately, we don’t live in a perfect world and executive leaders do carry the expectation to keep their private lives private, and if something is public it shouldn’t be controversial.

My two cents is that the guy was naive in thinking this wouldn’t undermines his executive role as leader of a campus. And naivety isn’t a great trait in a leader. But the president shouldn’t have made disparaging remarks about him and should simply have left it at a vague “differences in judgement.”

I read a NYT article on this and the videos included them having sex with the pornstars and they also published their own porn videos.

In an interview on Thursday, Mr. Gow and Ms. Wilson said that they believe they were fired over the videos, which included sex scenes together and with others under the username Sexy Happy Couple. Both said they felt it was wrong for the university to punish them over the videos, arguing that doing so infringes on their free speech rights.

Mr. Gow, 63, said he and his wife, 56, have made videos together for years but had decided recently to make them publicly available on porn websites and had been pleased by the response. They said they never mentioned the university or their jobs in the videos, several of which have racked up hundreds of thousands of views. The couple also has made a series of videos in which they cook meals with porn actors and then have sex.

The article also includes some basic legal history that doesn’t make it seem like they will have much recourse.

NYT gift article

I look at the long arc of history and see that progress is not monotonic (always increasing or decreasing). We are experiencing setbacks to overcoming our challenges, as have those who came before us. But while we can read about years passing in a paragraph in a history book, we have to live and experience those years. And with all the challenges comes new technology and drive and awareness to solve problems. As unfortunate as it is trouble breeds innovation and commitment to change far better than comfort and easy times.