During the Carrington Event solar storm of September 1, 1859, northern lights were reported as far south as Cuba. British astronomer Richard Carrington witnessed the megaflare on the sun through his telescope and was the first to realize the link between activity and geomagnetic disturbances on Earth. The geomagnetic disturbances were strong enough that year that U.S. telegraph operators reported sparks leaping from their equipment and some utility wires caught fire and were severed.
After great success with their home-built AC induction asynchronous drive motor used in all three of their first vehicles, Tesla has reportedly changed to a synchronous permanent magnet AC (PMAC) motor for their just introduced Model 3. The reports are that Tesla disclosed the motor type in documents for its EPA certification, where it stated: Drive Motor - AC 3-Phase PM, 192Kw, 258hp. The base model motor may be sized differently than the long-range one.
If you are designing a portable device, especially one that has fairly low average power, why not operate from a single battery? I see many applications using two or three primary batteries. That seems like a pretty big waste, when one will do just fine using a readily available, low-cost switching regulator chip. Those multiple batteries, of course, increase the voltage, but a great, high-efficiency boost converter can do that and keep a nice regulated supply for you as well.
Muck Rack makes it simple to find people, tweets, or articles that mention any name, keyword, company, hashtag etc. We've compiled this guide to help you make the most of your search.
Selecting a term
Start searching tweets, articles from media outlets, articles mentioned in tweets, journalists'
names, titles and bios with some suggested searches:
Companies or Topics (e.g. iPhone, Microsoft)
Phrases (e.g. "cloud computing") — use quotes to keep the terms together
Twitter handles (e.g. @username) — returns those who have mentioned or replied to
Names (e.g. "David Pogue")
Hashtags (e.g. #sxsw, #london2012)
Bio details (e.g. vegan, Olympics, father)
Muck Rack's Advanced Search allows for many boolean operators.
Find results that mention multiple specified terms, use AND or
+. For example, ensure each result contains both Elon Musk and Mark Zuckerberg by
searching Musk AND Zuckerberg or Musk + Zuckerberg.
Use the operators OR or , to broaden your search when you'd like either of
multiple terms to appear in results. (This is the default behavior of our search when no operators
are used). For example, results will contain either cake or cookie by searching cake OR cookie or cake,cookie
Use NOT or - to subtract results from your search. For
example, searching Disney will yield results about the Walt Disney Company as well as Walt Disney
World Resort. To exclude mentions of Disney World, search for Disney -World or Disney
When using one of these operators with a phrase, enclose it in quotation marks. For example, you can
find results about smartphones excluding Apple's iPhone 4S by searching smartphone -"iPhone
Exact case matching or punctuation
If you're searching for a brand name or keyword that relies on specific punctuation marks or capitalization, you can
find results that match your exact query by adding matchcase: before the keyword you're searching for, like matchcase:E*TRADE .
Use parentheses to separate multiple
boolean phrases. For example, to find journalists talking about having fun in Disney World or
Disneyland, search for ("disney world" OR disneyland) AND fun.
An asterisk can be used to search for any variation of a root word truncated by the asterisk. For example, searching for admin* will return results for administrator, administration, administer, administered, etc.
A near operator is an AND operator where you can control the distance between the words. You can vary the distance the near operation uses by adding a forward slash and number (between 0-99) such as strawberries NEAR/10 "whipped cream", which means the strawberries must exist within 10 words of "whipped cream".