Session Sixteen

Is the electromagnetic spectrum regulated?

Very strictly regulated electromagnetic channels  

• Highest bidders are willing to pay even up to $13M to get the ability to use these channels 

  • Version, AT&T, T Mobile  

What are the three reasons why we are interested in electromagnetic waves?

• travel long distance w/lim power supply

• can penetrate obstacles

• slow attenuation = eweaken slowly over time over distance

1G

Analog cell networks for voice comm  

• Don't have to stay at your desk  

• Big clunky phones  

• Analog = voice recorded with device sim to tape recorder so voice quality low, security low, expense high  

2G

digi wireless networks primarily for voice comm lim data capability  

• Voice recording via more mp3 device so better vocal quality  

• 2g tower is very tall steel looking tower = might disguise them through tree like vibes  

3G

high speed mobile supports vid and other rich media always on transmission for email web browing instant message  

• Max speed 144 kbps – 2 mbps 

• narrow band v broad band 

  • Dedicated add broadwith for data communication 

4G

the thing here is packet switching fastest best mobility support  

• Max speed 100 mbps –1 gbps 

5G

• current standards, low latency, up to 20 gbps  

  • Most common standard reqs faster connection speed and lower latency (delay) 

  • Each country dif vibes for this the above point is the most common stuff between  

  • Use channels w/no traffic = improves speeds –but why haven't we done this before? 

    • Bc only electromagnetic can go long distance and penetrate objects  

How did billy outpreform alice in each of the yrs but underpreform her overall?

• Depending on the analysis your data analysis team can slice and dice the data in certain ways so you should know what questions to ask  

• This is called the simpsons paradox 

Simpsons paradox

when discovering gender gap at UC Berkley in 1973 = female applicants lower admission rate but when look at data by dept other way around male applicants harder to get into dept  

Why do we use two way data tables and data anlaysis

We don't have the tools to handle data past two ways