tadd

caz-adam said:

illrigger said:

Hear that? It's the stampede of people rushing to get the old model before they go out of stock.

Why?

Ethernet scores over WIFI if only because when I change WiFI routers/access-point locations/distribution strategies (for creating a firewall between my home gear and my work gear most recently), the Ethernet connected devices don't care.  The only reason I want WiFi in the house is for smartphones, tablets, laptops.  But VOIP phones, home computers, connected cameras, printers, electronic/embedded projects, TVs and set-top boxes can all be Ethernet connected.  I like it that way.  DHCP and having the routers know the IP addresses of every wired device is most excellent.  Even changing Ethernet equipment doesn't lose the Ethernet access for each wired device. 

Getting rid of Ethernet in the set top box is a mistake from my perspective.  The good news is that I already have the one 4K AppleTV I need for now and it doesn't appear that they added any feature I was looking for so I will put off buying at this time.  I could imagine adding a 4K AppleTV elsewhere in the house and that will give me pause.  Right now my portable/bedroom/office Apple TV is a 1K unit.  

Oscilloscopes are useful for debugging tiny computers now.  Any computer found in a remote research base in that era lmight be like a semi portable computer of 1975, before the Apple ][ or Commodore 64.  An oscilloscope would be a likely tool found for debugging such a thing or checking control output.  A directional antenna which must track a moving object might be steered by such a computer and debugged using an oscilloscope.  Logic Analyzers of the day were not common tools of electrical engineers like oscilloscopes were.  

"It's also clear that the show won't be shying away from the belief among most historians that Dickinson had a long-running same-sex romantic relationship with her sister-in-law, Susan Gilbert. "

Most historians?  MOST??      I suggest "some"   or "historians who are interested in Dickinson" or something that qualifies this...    Is that contemporary English speaking historians?    Perhaps even naming the historians would be nice.  

jeff fields said:

tadd said:

AppleInsider said:

There are a lot of possible screen sizes for the iPhone. AppleInsider shows you exactly the size of the iPhone 11, iPhone 11 Pro, and iPhone 11 Pro Max -- and how they compare to other recent models.

You've had this conversation, we've had this conversation: the iPhone SE is tiny and it's a shame there's no longer any iPhone that small. Except if you actually compare the iPhone SE with, say, the iPhone 8 or even the new iPhone 11, then the difference is startling. For all that the newer models have bigger screens, their cases aren't truly that much bigger than that of the iPhone SE.

Um... 29% wider is truly that much bigger

iPhone SE is 4.87" x 2.31"  
That's the same as an iPhone 5

The iPhone 8 is 5.45" x 2.65"

That's 0.34" wider.  

The iPhone XR is 5.94" x 2.98".   Now it's .67" wider than the iPhone SE
The iPhone 11 is 5.94" x 2.98".  Same as the iPhone XR.  

So let's see.   2.31" + 29% =  (2.31" x 1.29) = 2.98"

Phones are three-dimensional. Why did you leave out the fact that the SE is considerably thicker?

Don't Panic
3Ghz to 300Ghz is Microwave.  WiFi 5Ghz is in the Microwave spectrum.  
What's really sarcastic, is that Microwave ovens, at 2.45ghz, are not in the Microwave spectrum.  They are called Microwaves because hype is always more important than technical accuracy.  
The reason Microwave ovens work so well is that their RF energy, 450 times as powerful as the max emissions of a cellphone, is both continuous, and all bottled up, so it reflects around inside the oven until it is absorbed by the food.  Unlike a communications transmission, it doesn't just expand outwards in a spherical pattern, it stays inside and bounces.  Much of the 900watts emitted by the oven actually gets to the food.  A cellphone is not in a shielded (bottled-up) enclosure, so the energy only gets one chance to be absorbed into the human, before it is off into the wild.  The only energy which hits the human, is that energy which happened to go out of the phone in the direction of the human, and which actually gets snagged by the substance of the human.  Think of it this way: if the human absorbed all of the 2 watts (maximum) the cellphone put out, the cellphone signal wouldn't reach the cell-site, but it does reach the cell-site.    

Cellphones put out power in short bursts at a power range from 0.02 to 2watts.  Short bursts cause less heating than continuous power.   

What is really interesting to me, is how little energy it takes to get a receiver to hear the cellphone.  A cellphone puts out something on the order of 1000000000 times as much energy as the receiver needs to hear it.  Because of the inverse-square (spherical radiation) of the transmitted signal, very little energy from the cellphone goes in the direction of, or gets as far as the antenna of the receiver which needs to hear it.  Receivers are really good at detecting the weak signal.  

There is so much misinformation in this space.  But it is also fascinating.  

This looks like a good chart.  
https://www.itstactical.com/wp-content/uploads/2014/10/Radio-Frequency-Spectrum.jpg

For most of us, if we are interested in learning more about how radios work, getting connected with the radio hobbyists is a good direction.  Check out 
http://tarpn.net/t/faq/faq_amateur_radio.html