896 karma · joined August 17, 2018
Facebook, Instagram and WhatsApp are only important when life is good. They are icing on the cake. But once things go south, they can be quickly discarded.
Ignoring CPI, inflation is rampant in many other areas such as agriculture (basically everything is up) and manufacturing of good (again, everything seems up, metal, paint, fasteners, etc.)
The problem is that the scope of the job has changed and you can't pay people enough to do it. Here are some issues, straight from teachers I was talking to last week:
* Admin who constantly wants teachers to do more with no additional resources so they can get credit for it and advance their career. They were very frustrated by this.
* Teaching evaluation based on absolute standardized scores rather than relative. So you can have a bad class, lift them a lot, but still be viewed poorly because on absolute terms, they are still weak. You might say that evens out over time, but it doesn't because some teachers are better with difficult students, so they get more than their share of these issues.
* Special needs students mainstreamed - kids with emotional issues that flip desks and yell out constantly, physical issues such as seizures if they bump their head, but parents will not let them wear protective gear because they will stand out, elementary school kids who are constantly in physical altercations with other kids.
* Kids come to school not having eaten since the day before, cloths that haven't been washed in days, etc.
* Unable to give accurate grades because parents fight back and so teachers are forced to pass kids even though they know they are just pushing a big problem on the next teacher.
* Zero support from parents and in many cases, outright hostility.
* The classroom is a minefield regarding what can be discussed and cannot be discussed. Everyone has an opinion on how it should be done, but almost none of them have ever actually taught.
I just had this conversation last week with a couple teachers. If this matters to you, I suggest you find some older teachers who have been around long enough to actually see how the job has changed and ask them what they think.
It has become an impossible job for any amount of money.
The problem is there are no "L" fittings and the normal fittings used for L copper can be quite poor. For this reason and others, some people like ProPress fittings which are very high quality (and expensive).
If you can't accelerate the failure mechanism in a well defined way, you cannot lab test long-term reliability other than just letting the system run. So if you want to guarantee 10 yrs of lifetime, you need to run it for 10 yrs. Obviously, that doesn't work for most products. Instead you have to rely on models, which, for a new node, might not be proven very well.
Bottom line was this vendor shipped products that nobody could really be sure would last the promised lifetime. This was regarded as a top silicon fab in the world. Back then, finer geometries were much harder because of new failure mechanisms. I don't know state of art today, but I would not be surprised if measuring reliability is still not a really hard problem for new nodes.
Edit: I am just referring to silicon issues, the rest of the PCB has its own set of issues totally separate. Generally however, those are better understood than a new process node.
So while high current does kill you, what causes it is high voltage. What is considered high? Depends on your impedance (ex. are your hands sweaty or dry?).
When dealing with high-current systems, there are safety procedures and concerns, but they are generally different than high-voltage. The systems I have dealt with are more about burns than electrocution. For example accidentally shorting out a fork lift battery can be spectacular in a bad way.