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Comment: Re:If dimples have this big an effect (Score 1) 138

by jbengt (#47533077) Attached to: Will Your Next Car Be Covered In Morphing Dimples?
Aircraft are not blunt objects, so they don't need as much help in keeping the airflow attached. Wings often have little angled vanes, (which do a better, more precise job of mixing high speed air into the boundary layer than dimples do) in order to keep the flow from detaching, and to keep the air moving across the wing rather than along it.

Comment: Re:11% fuel efficiency improvement (Score 1) 138

by jbengt (#47532827) Attached to: Will Your Next Car Be Covered In Morphing Dimples?
Aircraft designers already pay attention to separation of the airflow from the vehicle body (which is what the dimples reduce, by mixing higher velocity flows into the boundary layer). The long, streamlined, tapers at the tail do a better job than blunt objects with dimples. And many wings have small, angled fins along their length to ensure that the flow stays attached to the top of the wing and flows across the wing camber rather than following along the length of the swept-back wing.

Comment: Re:Has this ever happened to you? (Score 1) 216

by jbengt (#47008657) Attached to: Who controls the HVAC at work?

Typical AC will chill the air until it's colder than the desired temperature to dehumidify it and then warm it back up.

Typical AC will chill the air below the dewpoint, but will not reheat that air (except for the couple of degrees that the heat of the fan adds). In fact, most energy codes prohibit using energy to cool and then using more energy to reheat (except in certain circumstances where it may be vital, such as humidity-controlled labs, pharmaceutical plants, etc.). Only the more sophisticated, expensive AC systems reheat - those typically have some sort of heat exchanger to reheat supply using warm outdoor air or exhaust.

Comment: Re:That's totally how it works (Score 1) 343

by jbengt (#46971987) Attached to: Ask Slashdot: Does Your Job Need To Exist?

you can see that actual employment has been steadily falling since the 1960's in the USA, typically taking a dive after each recession, then regaining some but not all of the previous employment

Bull. In the sixties, most married women were not "employed", yet were not counted as "unemployed". The workforce per capita has increased greatly since then (yet real income has not risen commensurately).

Comment: Re:Way to state the obvious (Score 1) 552

by jbengt (#45775325) Attached to: Sun Not a Significant Driver of Climate Change

false, the Sun and insolation drives climate and climate change, greenhouse gas effects are secondary

Invalid, that does not contradict TFS or TFA. The point being made is not that solar activity is a minor influence, but that that changes in solar isolation cannot account for the patterns of climate change over the last millennium in the northern hemisphere, and that effects of volcanism and greenhouse gases fit the data better.

Comment: Re:NSA failed to halt subprime lending, though. (Score 1) 698

by jbengt (#45717661) Attached to: NSA Says It Foiled Plot To Destroy US Economy Through Malware

Except of course for the fact that the words themselves . . . actually do mean a form "raises the question".

Maybe if the phrase was something like ".. which begs to ask the question. . . ", otherwise, the "plain English" meaning of words themselves is that you are talking to a question, begging for something from it. (please, Mr. Question, may I have a dollar for a cup of coffee?)

Comment: Re:NSA failed to halt subprime lending, though. (Score 1) 698

by jbengt (#45717569) Attached to: NSA Says It Foiled Plot To Destroy US Economy Through Malware

People forget that the NSA has actually done a _lot_ over the past century that has been of extreme benefit

The NSA has only been in existence about 60 years. Yes, it had it's precursors in code-breaking military intelligence units in WW1 & WW2, but it was President Truman who secretly established the NSA (known as "No Such Agency")

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