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Proteus Technology: New Material Is Strong, Light and Non-Cuttable

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151–160 of 249 posts

Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#151
post #6

Porous Aluminum eh? Wonder how well it stands up to gallium, or acetylene, or MAP gas, or a grind wheel instead of a cutoff wheel.

the ceramic inside is alumina, so same material as both a cutoff wheel and a grinding wheel. They mention that it's not the best purity and hardness, but it's pretty good.

Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#152

Earlier quoted context omitted.

They just use a Ramset gun. Thieves are generally quite smart. The dumb ones tend to end up in prison, or worse.

I’ve watched a bunch of lockpickinglawyer videos and there are locks he cannot pick at all, and locks which take a hell of a lot of punishment from a Ramset gun. It’s not out of the realm of possibility that you could build a bike lock which would effectively deter thieves. After all, it doesn’t have to be indestructible, it just has to convince the thief that your bike is not worth the time and risk of attracting at…

Ride something from the early 80s, before they went to neon colors.

Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#153

Earlier quoted context omitted.

Seconded. This could have been written by Churchill.

[flagged]

What does literary ability have to do with anything else a person has done? Would Macbeth or Pride and Prejudice have been worse books if they were written by Hitler for example?

Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#154
post #44

> The freefall of grapefruit from 10 m does not damage the pulp[1] because pomelo peel consists of vascular bundles and an open-pored cellular structure with the struts made of parenchymatic cells. I have a Marsh grapefruit tree, fruiting now (southern hemisphere) as it happens, and I note that it produces particularly pithy progeny. (Ignoring for the moment that Pomelo is one of the parents of the modern grapefruit.…

While researching a reply, I uncovered USDA Technical Bulletin No. 1413: "Thermal Properties and Heat Transfer Characteristics of Marsh Grapefruit". Please enjoy: https://hortscans.ces.ncsu.edu/uploads/t/h/thermal__51bf44b0...

Goodness, that is interesting.

It's not clear why this matters from the paper, in that it sounds like (but not spelled out) that they are perhaps trying to refrigerate fruit for transport, where the transport itself is not actively refrigerated, merely insulated, so the reduction to target temperature has to occur before shipping. However this was published in 1970, and I'd assume in that part of the world refrigerated shipping and (large) storage was not uncommon?

Aside #1 - undamaged grapefruit will happily store at room temperature for 6 weeks or more, and be the tastier for it.

Aside #2 - received wisdom is that grapefruit, and perhaps most citrus, benefit from one or more frosts to 'sweeten up', though I have never understood the mechanisms for this claim, or how high-water fruit does not burst its vesicles and then deteriorate rapidly.

TFA and this paper you cited may speak to the latter (the fruit content does not freeze overnight as the thermal inertia is so high), and might partially debunk the former.

Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#155

Earlier quoted context omitted.

They just use a Ramset gun. Thieves are generally quite smart. The dumb ones tend to end up in prison, or worse.

I’ve watched a bunch of lockpickinglawyer videos and there are locks he cannot pick at all, and locks which take a hell of a lot of punishment from a Ramset gun. It’s not out of the realm of possibility that you could build a bike lock which would effectively deter thieves. After all, it doesn’t have to be indestructible, it just has to convince the thief that your bike is not worth the time and risk of attracting at…

One painful lesson I learned after having an expensive bike with an expensive lock stolen is that as you harden the lock at some point the weakest link shifts from being the lock to the thing the lock is attached to.

Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#157

Earlier quoted context omitted.

[flagged]

What does literary ability have to do with anything else a person has done? Would Macbeth or Pride and Prejudice have been worse books if they were written by Hitler for example?

Probably not, but would it be as widely distributed and read?

(good heavens, the implications - ultra right wing skinheads suddenly willing to reading Pride and Prejudice...)

Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#158
post #154

Earlier quoted context omitted.

While researching a reply, I uncovered USDA Technical Bulletin No. 1413: "Thermal Properties and Heat Transfer Characteristics of Marsh Grapefruit". Please enjoy: https://hortscans.ces.ncsu.edu/uploads/t/h/thermal__51bf44b0...

Goodness, that is interesting. It's not clear why this matters from the paper, in that it sounds like (but not spelled out) that they are perhaps trying to refrigerate fruit for transport, where the transport itself is not actively refrigerated, merely insulated, so the reduction to target temperature has to occur before shipping. However this was published in 1970, and I'd assume in that part of the world refrigerat…

I heard (no refernece, sorry) that oranges do from green to orange when the temperature drops. Apparently colour change does not affect taste, nor necessarily indicate ripeness. Would anyone knowledgeable please chip in and correct or elaborate on this please.

Re: Proteus Technology: New Material Is Strong, Light and Non-Cuttable

#160

Earlier quoted context omitted.

[flagged]

What does literary ability have to do with anything else a person has done? Would Macbeth or Pride and Prejudice have been worse books if they were written by Hitler for example?

Hitler is not praised the way Churchill is in mainstream.
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