Categories
Cryptocurrency Ethereum Mastering Development

What node(s) does Ethereum broadcast a transaction first? How is it determined?

When I as a user make a transaction, where or what node(s) does it get sent to first? How does an Ethereum node, in terms of implementation details, determine that? Does it send a new transaction to, say, 1 random or multiple random node? Or to a certain one(s) that meet a certain criteria? Or […]

Categories
Cryptocurrency Ethereum Mastering Development

What node(s) does Ethereum broadcast a transaction first? How is it determined?

When I as a user make a transaction, where or what node(s) does it get sent to first? How does an Ethereum node, in terms of implementation details, determine that? Does it send a new transaction to, say, 1 random or multiple random node? Or to a certain one(s) that meet a certain criteria? Or […]

Categories
Cryptocurrency Ethereum Mastering Development

What node(s) does Ethereum broadcast a transaction first? How is it determined?

When I as a user make a transaction, where or what node(s) does it get sent to first? How does an Ethereum node, in terms of implementation details, determine that? Does it send a new transaction to, say, 1 random or multiple random node? Or to a certain one(s) that meet a certain criteria? Or […]

Categories
Mastering Development System & Network

What is the best way to keep files in sync between an EC2 instance and a local Win Machine?

Premise: I’m a complete newb. So any gentle hints are much appreciated 🙂 So, I spun up an EC2 instance and dumped my scraper I had built in Python. I’ve set up cronjobs to run my scraper at scheduled intervals. At each run, my scraper saves a set of results to a relative local folder […]

Categories
Mastering Development System & Network

What is the best way to keep files in sync between an EC2 instance and a local Win Machine?

Premise: I’m a complete newb. So any gentle hints are much appreciated 🙂 So, I spun up an EC2 instance and dumped my scraper I had built in Python. I’ve set up cronjobs to run my scraper at scheduled intervals. At each run, my scraper saves a set of results to a relative local folder […]

Categories
User Help Web Pro

Is it possible to cache a full website and load it offline from memory next time visiting it

If I went into, say, facebook, it would take a few seconds to load depending on the internet connection speed. If I were to cache everything (js, css, html) onto my laptop, and next time I open facebook, would it work if I were to load everything from cached, and then diff the newly loaded […]

Categories
Arduino Ask Engineering

Where are 74xx and 40xx ICs as stepping stones to Arduino-based instruction?

I am seeking a ramp that leads to a more graceful teaching of digital circuits without ever having to demonstrate black boxes until their internals could, in principle, be built from scratch by the learner. A nice way to teach digital circuits is, or at least was, to use a few 7400-series (74xx) and a […]

Categories
Database Development

PostgreSQL extended statistics

I have a 1 TB read-only database where performance is critical. It’s difficult to predict queries since they are dynamically generated by the users (the whole thing is basically a visualization platform atop a large collection of medical studies, and users select what they want to visualize). Queries can often be complex and involve 10+ […]

Categories
Ask Biology

Why did the indigenous peoples of northern Asia and America not evolve the same physical characteristics as people of Nordic ancestry?

I was watching DW’s documentary on the Arctic the other day, and I was struck by how the indigenous peoples of the far north seemed – visually speaking – to fit into two categories. On the one hand, there are the peoples of northern Europe, with their pale skin and their preponderance of blue-eyed and […]

Categories
Ask Biology

Why did the indigenous peoples of northern Asia and America not evolve the same physical characteristics as people of Nordic ancestry?

I was watching DW’s documentary on the Arctic the other day, and I was struck by how the indigenous peoples of the far north seemed – visually speaking – to fit into two categories. On the one hand, there are the peoples of northern Europe, with their pale skin and their preponderance of blue-eyed and […]