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User Help

Restore old Chrome Profile on OSX Mojave?

I spent a week sorting through all data on my Google account a couple weeks ago. Today I looked at the password manager, and it’s back to what it was before I edited it. I suspect using Chrome on my phone messed it all up… I hate broken synchronization. So I remembered Google saves "Profile […]

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Mastering Development

Why does MeasureString insist extra height is required for text? [closed]

I get unexpected results when measuring a string in .NET 4.8/Winforms against a graphics object representing a printer device: var font = new Font("Verdana", 8, FontStyle.Regular); var format = new StringFormat { Alignment = StringAlignment.Near, FormatFlags = StringFormatFlags.LineLimit, LineAlignment = StringAlignment.Near, Trimming = StringTrimming.Word, HotkeyPrefix = HotkeyPrefix.None }; var text = "22226GLLJXZ"; var size = […]

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Ask Biology

Can ‘human’ become a genus due to space colonization?

I have read that during the Second World War, some mosquitoes got trapped in the London underground railway system. The mosquitoes never got out and eventually they became a new species by themselves. I had a similar thought. In the next few centuries, if humans could, in theory, colonize other planets like Mars, Proxima Centauri […]

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Ask Biology

Can the brain alter how our genes expressed?

I have been wondering something , in theory , if there was a way to infulence the brain / subconsious mind to alter genes, expression , would it be able to? There is a biologist, bruce litpon that believes the subconsious mind operate throught the membrane of the cell , and there have been studies […]

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Ask Games RPG Games

Tunnel defense effective against Specters? [DND 5E] [closed]

This is a fun one…DND 5E session. Assume a 5′ corridor that if 25′ long leading to a dead-end (5 squares), and 5 party members (all medium size) fill each of those squares. A well armored tank as at the front, trying to defend the party. This is the scenario a party has encountered a […]

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Database Development

PostgreSQL: duplicates despite having a unique constraint

We have a table in the production DB that looks like this: create table domains ( domain_id serial not null constraint domains_pkey primary key, domain_name text not null constraint domains_domain_name_key unique ) For some reason, we’ve got duplicates in that table, even though, in theory, this is impossible. Here’s a query that I use to […]

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Mastering Development

Conditional join in pandas datafrane

I have a dataframe where each line represents a train’s departure, another where each line represent a event that, in theory, happens every 13 seconds (roughly), and one that gives the travel’s expected duration for each train. The trains departures time actually correspond to a signal that is normally sent each time the train starts […]

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Ask Engineering

On measuring the common mode gain of an op-amp using a simulator?

I have been trying for a while now to measure the common voltage gain of the LM741, which according to Op Amps: Design, Application, and Troubleshooting page 21 is around 6, using Multsim and Orcad. The images bellow are from the same reference. So, in theory, if I realize the circuit above, and set the […]

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Ask Engineering

On measuring the common mode gain of an op-amp using a simulator?

I have been trying for a while now to measure the common voltage gain of the LM741, which according to Op Amps: Design, Application, and Troubleshooting page 21 is around 6, using Multsim and Orcad. The images bellow are from the same reference. So, in theory, if I realize the circuit above, and set the […]

Categories
Ask Engineering

On measuring the common mode gain of an op-amp using a simulator?

I have been trying for a while now to measure the common voltage gain of the LM741, which according to Op Amps: Design, Application, and Troubleshooting page 21 is around 6, using Multsim and Orcad. The images bellow are from the same reference. So, in theory, if I realize the circuit above, and set the […]