Category: education

Why It’s So Freaking Hard To Make A Good COVID-19 Model

From FiveThirtyEight

Great article, please read it. Be wary of data without context. Always.

Numbers aren’t facts. They’re the result of a lot of subjective choices that have to be documented transparently and in detail before you can even begin to consider treating the output as fact.

How Soon Will COVID-19 Peak?

Difficult to tell, but the sooner social distancing is applied the better. Stay at home.

Wash your hands, it’s always good advice.

In this FREE British English lesson, Chris explains English football and the Premier League, as well as pronunciation practice: Football (not soccer, please): 11 players

Officials: referee; two linesmen; fourth official;

VAR (Video Assistant Referee) VAR: clear and obvious errors – penalties; goals; handballs; offsides??

Premier League Championship League One League Two FA Cup League Cup Champions League Europa League

Nicknames Manchester United = the Red Devils Arsenal = the Gunners

Stadium Names Chelsea’s stadium is Stamford Bridge Liverpool’s stadium is Anfield

Teams in the English Premier League – pronunciation practice

This is a Learn British English Free lesson in which Chris explains the difference between “look for” and “search (for)”. 

Look for – more natural, common and informal (always with “for”)
“I can’t find my car keys.” “Let’s look for them then”.
“What are you looking for?”

Search (for) – more formal (e.g. police)
“The police are urgently searching for the suspect.”
“The police were searching the area last night.” (verb without “for”)
“The police conducted a thorough search of the property.” (noun)

Please see above the imperial units commonly used in the UK to talk about weight.

We often use ounces to describe amounts of ingredients in recipes. We use pounds and stone for describing our own weight. Tons measure very heavy things:

Please see above for British imperial units of volume.

The pint measurement (pronounced /paɪnt/) is very important because we use it to measure drinks in pubs.

Gallons are used to talk about the fuel consumption of vehicles:

Improve your British vocabulary:

“…The Non-Member State Summer Student Programme represents a unique opportunity for students from around the world, especially from less advantaged countries, to spend their next summer getting involved in some of the world’s biggest scientific experiments at CERN. For most of the students, their summer at CERN will represent a lot of firsts. The first time they will travel abroad, the first time they will work in a fully-equipped physics laboratory, the first time they will meet fellow students from different cultural backgrounds.”

Precision vs. accuracy

Imagine an archer who has shot ten arrows. In this scenario, precision is a measurement of the arrows’ positions relative to each other and accuracy is a measurement of their positions relative to the bullseye. A precise archer isn’t necessarily an accurate one, and vice versa.

The precision of an archer is analogous to a concept called clock stability. If one thinks of each tick of the clock as a shot and hitting the bullseye as keeping the exact right time between every tick, then a precise but not accurate clock would consistently tick either slower or faster than the desired amount of time. On the other hand, an accurate but imprecise clock would tick sometimes faster and sometimes slower, but the accumulated errors would average out somewhat over time.

Via Inside Science: Why Do We Need Super Accurate Atomic Clocks?