Things you always wanted to know the answer to [Vol. 3]
Discussion
StevieBee said:
If an Ai programmer wrote a bit code or an algorithm for a driverless car whilst he was drunk and as a result, some time in the future, that car whilst operating in driverless mode killed a pedestrian, would the programmer be done for drink-driving?
(For the sake of the question, let's assume it can be proven the programmer was drunk at the time he wrote the code).
Programmers are expected to make coding errors, that's what QA departments are for.(For the sake of the question, let's assume it can be proven the programmer was drunk at the time he wrote the code).
Einion Yrth said:
StevieBee said:
If an Ai programmer wrote a bit code or an algorithm for a driverless car whilst he was drunk and as a result, some time in the future, that car whilst operating in driverless mode killed a pedestrian, would the programmer be done for drink-driving?
(For the sake of the question, let's assume it can be proven the programmer was drunk at the time he wrote the code).
Programmers are expected to make coding errors, that's what QA departments are for.(For the sake of the question, let's assume it can be proven the programmer was drunk at the time he wrote the code).
I guess the wider question is where does the limit of liability extend in Ai? You can't prosecute a robot or computer!
StevieBee said:
Einion Yrth said:
StevieBee said:
If an Ai programmer wrote a bit code or an algorithm for a driverless car whilst he was drunk and as a result, some time in the future, that car whilst operating in driverless mode killed a pedestrian, would the programmer be done for drink-driving?
(For the sake of the question, let's assume it can be proven the programmer was drunk at the time he wrote the code).
Programmers are expected to make coding errors, that's what QA departments are for.(For the sake of the question, let's assume it can be proven the programmer was drunk at the time he wrote the code).
I guess the wider question is where does the limit of liability extend in Ai? You can't prosecute a robot or computer!
Jonboy_t said:
Jonnny said:
How does a Super Market decide how much to discount something by? Do they take it down to their cost, is it below cost to make something rather than bin it? Does the out of date stuff go in the bin? Does the oik on the gun have control or is it now computerised centrally and he just prints the ticket?
There's LOADS of factors around what drives it - way too many to really list! Sometimes it is just discounted by whatever the bods in Commercial think they can get away with without losing money. Other times it does actually lose money, but the losses are outweighed by incremental sales (called a Loss Leader - drives punters in and they buy other stuff while they're there).Most big ones will have rebate agreements with suppliers too, whereby they say "we usually buy this pen at £1 cost price, but if we sell 1million of them, you need to give us a 10% back based on the quantity we bought". They can then use this 10% rebate to offset against the reduced profits from discounting the product.
Bear in mind that most big chains will generally have a margin of about 30% on anything they sell (so they buy the pen for £1 and sell it for £1.30), so there is plenty of room for them to drop the price to drive the sales in order to get that lost revenue back through their rebate agreement.
With out of date stuff, it depends on the stock type really. If it's perishable, they can be required by law to bin it safely. If it's something like a chair or a table, it's down to the store and/or Commercial people to agree how to manage it. I work for a big retailer and the majority of our stock is non-perishable, so we produce a big list every month/quarter/year of all our clearance stock that's out of date or out of season, give the store the cost price back to their P&L for it and then tell them to skip it/donate it to a local charity.
Price label wise, usually it's centrally loaded onto store databases, but that varies from retailer to retailer depending on what type of system they use.
On everyday groceries I know one retailer sells products on promotion in numerous stores where they don't have an ongoing listing and has an algorithm which works out a price per unit to clear out remaining stock within a set time period post promo. E.g. if a big store sells 10 units a day and has 15 left over at the end of a promo there may be a few pence reduction but a smaller conveience store sells four a day and has 15 left over it'll go to half price to clear out swiftly. The supplier will agree a clearance sum for these promos.
Only out by an order of magnitude on the area of the steel cube, and a factor of ~1.5 on the size of the marble (did you model it with the density of steel?)
I'd finish the coffee before designing anything critical
I'd finish the coffee before designing anything critical
RizzoTheRat said:
The paper will hit terminal velocity sooner, but the terminal velocity for the lead will be higher
Think about 2 objects of the same dimensions but different densities.
There are 2 main forces acting on it, gravity and drag
Acceleration due to gravity is constant so both objects will start falling at the same acceleration, but the force acting on the object is Mass x Acceleration, so the denser one has a greater force
Drag is proportional to Velocity squared x Area x Coefficient of Drag. So as they're both the same shape it's purely related to velocity squared.
An object will reach terminal velocity when the drag is equal to the force due to gravity, which will be therefore be higher for the denser object.
If it was a 200kg anvil and a 200kg cannon ball, the ball would land first due to its lower drag and therefore higher terminal velocity, but for a 200kg anvil and a 5g marble, we'd need to work out the anvil's drag coefficient.
However as I have a cup of coffee on the go...
If it was a 200kg iron cube, it would have a drag coefficient of about 1, and an area of about 0.0864m^2
At terminal velocity at standard sea level air density (1.225 kg/m3):
Force = mass x Acc = Cd x Area x (air density x Velocity squared) / 2
F= 200 x 9.81 = 1 x 0.0864 x (1.225 x V^2)/2 Therefore terminal velocity is about 192m/s, or about 433 mph.
For a 5g, 1.5 cm marble
F = 0.005 x 9.81 = 0.5 x 0.00018 x (1.225 x V^2)/2 Therefore terminal velocity is about 9.4m/s, or about 21 mph
Therefore the cube would hit the ground first, and I would expect an anvil to also be quicker than the marble.
Think about 2 objects of the same dimensions but different densities.
There are 2 main forces acting on it, gravity and drag
Acceleration due to gravity is constant so both objects will start falling at the same acceleration, but the force acting on the object is Mass x Acceleration, so the denser one has a greater force
Drag is proportional to Velocity squared x Area x Coefficient of Drag. So as they're both the same shape it's purely related to velocity squared.
An object will reach terminal velocity when the drag is equal to the force due to gravity, which will be therefore be higher for the denser object.
If it was a 200kg anvil and a 200kg cannon ball, the ball would land first due to its lower drag and therefore higher terminal velocity, but for a 200kg anvil and a 5g marble, we'd need to work out the anvil's drag coefficient.
However as I have a cup of coffee on the go...
If it was a 200kg iron cube, it would have a drag coefficient of about 1, and an area of about 0.0864m^2
At terminal velocity at standard sea level air density (1.225 kg/m3):
Force = mass x Acc = Cd x Area x (air density x Velocity squared) / 2
F= 200 x 9.81 = 1 x 0.0864 x (1.225 x V^2)/2 Therefore terminal velocity is about 192m/s, or about 433 mph.
For a 5g, 1.5 cm marble
F = 0.005 x 9.81 = 0.5 x 0.00018 x (1.225 x V^2)/2 Therefore terminal velocity is about 9.4m/s, or about 21 mph
Therefore the cube would hit the ground first, and I would expect an anvil to also be quicker than the marble.
DRFC1879 said:
Jonboy_t said:
Jonnny said:
How does a Super Market decide how much to discount something by? Do they take it down to their cost, is it below cost to make something rather than bin it? Does the out of date stuff go in the bin? Does the oik on the gun have control or is it now computerised centrally and he just prints the ticket?
There's LOADS of factors around what drives it - way too many to really list! Sometimes it is just discounted by whatever the bods in Commercial think they can get away with without losing money. Other times it does actually lose money, but the losses are outweighed by incremental sales (called a Loss Leader - drives punters in and they buy other stuff while they're there).Most big ones will have rebate agreements with suppliers too, whereby they say "we usually buy this pen at £1 cost price, but if we sell 1million of them, you need to give us a 10% back based on the quantity we bought". They can then use this 10% rebate to offset against the reduced profits from discounting the product.
Bear in mind that most big chains will generally have a margin of about 30% on anything they sell (so they buy the pen for £1 and sell it for £1.30), so there is plenty of room for them to drop the price to drive the sales in order to get that lost revenue back through their rebate agreement.
With out of date stuff, it depends on the stock type really. If it's perishable, they can be required by law to bin it safely. If it's something like a chair or a table, it's down to the store and/or Commercial people to agree how to manage it. I work for a big retailer and the majority of our stock is non-perishable, so we produce a big list every month/quarter/year of all our clearance stock that's out of date or out of season, give the store the cost price back to their P&L for it and then tell them to skip it/donate it to a local charity.
Price label wise, usually it's centrally loaded onto store databases, but that varies from retailer to retailer depending on what type of system they use.
On everyday groceries I know one retailer sells products on promotion in numerous stores where they don't have an ongoing listing and has an algorithm which works out a price per unit to clear out remaining stock within a set time period post promo. E.g. if a big store sells 10 units a day and has 15 left over at the end of a promo there may be a few pence reduction but a smaller conveience store sells four a day and has 15 left over it'll go to half price to clear out swiftly. The supplier will agree a clearance sum for these promos.
Johnspex said:
I did that all wrong didn't I? I knew what it stood for in the example shown ,obviously, but equally obviously, that isn't the correct answer. So it's obviously not nuns in a hot tub but what is it?
Just got in from work and was hoping someone had answered this, been bugging me all day.Einion Yrth said:
StevieBee said:
If an Ai programmer wrote a bit code or an algorithm for a driverless car whilst he was drunk and as a result, some time in the future, that car whilst operating in driverless mode killed a pedestrian, would the programmer be done for drink-driving?
(For the sake of the question, let's assume it can be proven the programmer was drunk at the time he wrote the code).
Programmers are expected to make coding errors, that's what QA departments are for.(For the sake of the question, let's assume it can be proven the programmer was drunk at the time he wrote the code).
Ayahuasca said:
Dr Jekyll said:
Why is Meghan Markle described as 'mixed race' while President Obama is described as 'black'?
Obama looks black, but Meghan does not?I resolved to take the 'popcorn' option and resist any further damage to my already tarnished reputation
Johnspex said:
Nimby said:
Johnspex said:
They've got all the answers except 49n in HT. Lower and upper case as shown originally.
You are Dave Gorman and you aren't catching me again.Nimby said:
Johnspex said:
Nimby said:
Johnspex said:
They've got all the answers except 49n in HT. Lower and upper case as shown originally.
You are Dave Gorman and you aren't catching me again.Gassing Station | The Lounge | Top of Page | What's New | My Stuff