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I haven't been able to find documentation on how the center of load is calculated for "rcforc" contact force binary output. That would be nice to know what LS-DYNA is assuming the center of moments are.

Imagine you have a moving contact surface. At what point is the moment calculated?

What is the social or utilitarian justification for billionaire private wealth?

So the argument goes, the wealthy ought to be rewarded for prudent investments that ultimately contribute to efficient markets. I sort of buy that. But after the first couple hundred million dollars of return on investment, how much motivation do stocks play in continuing to motivate the wealthy to perform socially efficient or utilitarian actions? Why is a billion dollar corporate stake socially good? Why is it inefficient to tax billionaires?

In terms of taxes, is there any reason why wealth taxes are less efficient than for example income taxes? If we shouldn't have wealth taxes, should we also get rid

So d3plots can get quite disk expensive. I'm just wondering if it is possible to edit d3plots to for example, throw away all data except for plastic strain and displacements.

Imagine a company that paid out salary only from stock. The company would only pay you minimum wage or no wage at all, and the rest of the compensation would be paid out in guaranteed price stock (as in the company will always buy back the stock at a set price). To spend your compensation, you take out low interest loans from this company. Meanwhile, your stock can be reinvested (as you see fit, by default SPY or money market). Even if you get fired, you could continue to stay invested.

Voila, is tax avoidance achieved? This could even work for people earning paycheck to paycheck.

Would this work? Why or why not?

It could be win-win for both employer and employee. The employer can earn

Just wondering, how do you guys usually model rope or chain for larger structural models?

IMO it would be nice if there was some official way to type-hint numpy arrays to describe shape. Has that happened yet?

So I'm doing some crash analysis in LS-DYNA and observe that the global total energy of the problem from the binouts is decreasing over time substantially, greater than 10%.

Why would total energy drop in a LS-DYNA problem? Online documentation suggests that essentially all effects, including eroded elements, are included in the energy balance.

So I was perusing the technical specs of CAT 320 / 323D excavators. On all their brochures, they list a component called a "standard swing frame" and its component weight.

I'm wondering, exactly what is the swing frame? Is is the same thing as the "Upper Frame" like this one?

https://parts.cat.com/en/catcorp/product/557-0050

Thanks for your help!

So I was perusing the technical specs of CAT 320 / 323D excavators. On all their brochures, they list a component called a "standard swing frame" and its component weight.

I'm wondering, exactly what is the swing frame? Is is the same thing as the "Upper Frame" like this one?

https://parts.cat.com/en/catcorp/product/557-0050

Thanks for your help!

So imagine we are living in a hypothetical Fascist state, or authoritarian state, or a rising/aspiring Fascist regime.

Imagine it becomes the expectation of businesses to pay bribes to the regime. What are the ethics of participating in business in such a regime?

For example, imagine hypothetical defense contractor Loggerhead-Maxwell or tech company Moodle must pay bribes to the head of state to receive government, business contracts, or favorable regulations. Is this ethical? Do businesses continue to have the obligation to compete to feed themselves and their employees? Or should responsible businesses sacrifice themselves and refuse to pay to play?

For example, some German companies

So imagine we are living in a hypothetical Fascist state, or authoritarian state, or a rising/aspiring Fascist regime.

Imagine it becomes the expectation of businesses to pay bribes to the regime. What are the ethics of participating in business in such a regime?

For example, imagine hypothetical defense contractor Loggerhead-Maxwell or tech company Moodle must pay bribes to the head of state to receive preferential government or business contracts. Is this ethical? Do businesses continue to have the obligation to compete to feed themselves and their employees? Or should responsible businesses sacrifice themselves and refuse to pay to play?

For example, many German companies have been