Regarding the Kala Jeera. You are right that there are at least two that is loosely called by the same name. The Nigella Sativa, which is slightly teardrop shaped and very dark/black are called Kalo or Kala Jeera in Bengali. In stores it also goes by the name Kalonji . Some call it onion seeds but that name probably came from the flavors as it would seem similar to onion powder in the first whiff.. This spice is very widely used in Bengali cuisine. In the rest of the Indian cuisine the use is limited but a lot of Indian pickle recipes use this Kalonji. This one is one of the ingredients of the Indian Five Spice Mix or Panch Phoron.
Out of 4,693 worker fatalities in private industry in calendar year 2016, 991 or % were in construction — that is, one in five worker deaths last year were in construction. The leading causes of private sector worker deaths (excluding highway collisions) in the construction industry were falls, followed by struck by object, electrocution, and caught-in/between. These "Fatal Four" were responsible for more than half (%) the construction worker deaths in 2016 , BLS reports. Eliminating the Fatal Four would save 631 workers' lives in America every year .
Very complex circuits can become unmanageable on a solderless breadboard due to the large amount of wiring required. The very convenience of easy plugging and unplugging of connections also makes it too easy to accidentally disturb a connection, and the system becomes unreliable. It is possible to prototype systems with thousands of connecting points, but great care must be taken in careful assembly, and such a system becomes unreliable as contact resistance develops over time. At some point, very complex systems must be implemented in a more reliable interconnection technology, to have a likelihood of working over a usable time period.