mentions 3 three alternative interpretations for GRB 250702B:
1. Ultralong Collapsars: These stellar-engine models can explain long durations but struggle to account for the specific timing of this event. Specifically, they cannot easily produce a 12-hour gradual rise in X-rays followed by a multi-hour peak, as the jet would have to fight through a massive progenitor star while its power is still very low.
2. White Dwarf (WD) Tidal Disruptions: While an Intermediate Mass Black Hole (IMBH) disrupting a White Dwarf could theoretically provide the necessary gravity, the numbers do not add up for this specific burst. The timing between flares is too long for a WD scenario, and the total energy required would demand an unrealistically narrow jet. When physical constraints like detonation are factored in, this model is considered highly unlikely.
3. Micro-TDEs (Main Sequence star by a stellar-mass BH/NS): This is considered a competitive alternative that can explain the burst's sub-second variability and long duration. However, it faces two main issues: current afterglow data suggests the surrounding gas density matches an IMBH environment better than a micro-TDE environment, and the burst’s extreme energy would require very high jet efficiency or a very narrow beam.
Sorry, but can someone explain to me why Flash failed? Was it because Apple killed it, or other reasons? Because not open source? Too heavy? I never really got the story, or only got bits and pieces. I know a lot of people liked Flash.
I had my handyman build one of these in front of our house. Also, I make a hobby of biking around to circulate books between different little free libraries in my extended neighborhood. I've found some amazing books over the years, things that were very different from my typical prior experience of books. I like this aspect, that it can be eye opening. Each little free library has it's own style of books. Some are better at handling magazines. Some see a lot of book movement, some much less. These factors influence how I move books around from one to another.
Suggestions on building a little free library:
1) By far the number one priority: Waterproof. If it's not waterproof, in my opinion you're actually doing a disservice to the community, rather than a service. And have an angled roof for proper drainage.
2) Don't make it too deep. Definitely not more than 18 inches. Probably 15 inches is a good depth.
3) If you can, make two levels: One level for tall books, another level for short books.
4) Don't make it too tiny, because then it's hard to get books in and out of.
5) A good solid stand so it doesn't fall over.
6) A good latch that will resist wind. Magnetic is good. I also like to have a magnet plus a hook that can be used for backup. Also with time it's nice to have the second option in case the shape changes a little and the magnet doesn't work.
7) You might try making a mockup out of cardboard so you can see the physical size and get a sense of how many books will fit.
8) Not a building tip, but: Try to arrange the books to look nice. If you have few books you can face some of them to attract attention.
Magnus is just so tenacious. From a lost position he snatched a victory. Take a look at the five hour mark (plus or minus) for the crucial moments of the key game: https://www.youtube.com/watch?v=s6ey5Up4S7w
Again: Metadata. WhatsApp records a timestamp of every message you send/receive, and who the other party is. Signal only records two pieces of metadata: timestamp of when you signed up, timestamp of the last time you sent a message.
https://watermark02.silverchair.com/stag328.pdf?token=AQECAH...
mentions 3 three alternative interpretations for GRB 250702B:
1. Ultralong Collapsars: These stellar-engine models can explain long durations but struggle to account for the specific timing of this event. Specifically, they cannot easily produce a 12-hour gradual rise in X-rays followed by a multi-hour peak, as the jet would have to fight through a massive progenitor star while its power is still very low.
2. White Dwarf (WD) Tidal Disruptions: While an Intermediate Mass Black Hole (IMBH) disrupting a White Dwarf could theoretically provide the necessary gravity, the numbers do not add up for this specific burst. The timing between flares is too long for a WD scenario, and the total energy required would demand an unrealistically narrow jet. When physical constraints like detonation are factored in, this model is considered highly unlikely.
3. Micro-TDEs (Main Sequence star by a stellar-mass BH/NS): This is considered a competitive alternative that can explain the burst's sub-second variability and long duration. However, it faces two main issues: current afterglow data suggests the surrounding gas density matches an IMBH environment better than a micro-TDE environment, and the burst’s extreme energy would require very high jet efficiency or a very narrow beam.