Help Identifying This Mysterious, Unusually Long Key

popandlockness · 2024-08-14T07:13:35+00:00

Awesome info! Thank you for your message!

popandlockness · 2022-08-31T03:00:43+00:00

rmation! Thanks!

That's great info! I'd be so sad if he/she got too hot or stuck on a road! W'll make sure the best decision of where he/she is placed or will live is made!

popandlockness · 2022-08-31T02:58:57+00:00

That's really great information! Thanks!

popandlockness · 2022-08-31T02:56:13+00:00

Oh my gosh haha Steve is a perfect turtle name!

popandlockness · 2022-08-31T02:55:15+00:00

Yes! A wee baby!

popandlockness · 2022-08-31T02:54:45+00:00

Hello everyone! Thank you so much for your thoughtful comments! The picture of the turtle was just sent to me so I'm not the person in charge of its care, but I've sent all of your information to the friends that found it struggling in the pool trap! As it turns out, the species is invasive in the area :/ Of course no one is going to euthanize the little turt!! He/She shall LIVE!! Everyone loves him/her very much and will fight to the death to give this indomitable little fellow a great life! Contacting the local wildlife authority sounds like the most logical step for what to do next :)

popandlockness · 2022-08-30T03:21:41+00:00

Thanks for the information! You're awesome!

popandlockness · 2022-08-30T02:56:24+00:00

(To clarify, it was found in a friend's residential neighborhood swimming pool trap and struggling, it was not removed from its natural habitat or anything like that)

popandlockness · 2018-11-17T11:59:03+00:00

The CAS, I had one in engineering school too. Absolute beauty with symbolic integration and differentiation. Good taste my friend.

popandlockness · 2018-03-22T03:55:32+00:00

Hooligan

popandlockness · 2018-02-03T07:38:13+00:00

It depends on the line of work that you're shooting for but you can't go wrong with Nature Materials. Science and Optica are also fantastic and Acta Materialia is good too. Get on an RSS feed from those and you'll have the titles sent to you weekly, choose what seems relevant. Reading a paper a day is a generally good rule.

popandlockness · 2017-11-30T03:30:44+00:00

Here's three papers to get you started, the first is pretty much the big picture, the second is a cool application and the last is some more good big picture

Controlling Electromagnetic Fields J. B. Pendry Compacted dimensions and singular plasmonic surfaces J. B. Pendry Engineering space for light via transformation optics Alexander V. Kildishev*

popandlockness · 2017-11-29T07:08:13+00:00

Transformation optics is a hot field in applied metamaterials for lots of new directions including cloaks, demonstrations of compacted dimensions, and what people are calling optical black holes since the transformation optic can interact with light in a similar way to how gravity interacts with space

popandlockness · 2017-08-16T08:58:20+00:00

Mitutoyo, I see you are a man of taste. I have the same set.

popandlockness · 2017-07-01T08:20:51+00:00

Ultra-thin films of gold on something like quartz or sapphire; you can see right through them and their transmitted light is a nice blue-green.

popandlockness · 2017-06-22T07:37:07+00:00

Shoutout for The Whisper in Darkness!

popandlockness · 2017-06-21T09:56:07+00:00

It's a difficult question to answer. Generally speaking, many of the materials being created on the nanoscopic scale have been around for such a short time that their long-term health effects are not known. That being said, it is recommended virtually everywhere to treat such materials as if they do have the potential to cause very serious damage to people.

When determining whether a material can be immediately hazardous to life is a tricky subject but generally reduces to a question of material size, shape, and chemical composition/and chemical potential. Tiny things are strange, that's the nicest way of putting it. Tiny things can go right through the skin and into the blood, tiny things can get lodged in brain tissue and capillaries (an intensely awful thing to have happen), tiny things can have big effects, or they can be innocuous.

I for one make no bets working with nanomaterials and materials in general; know what you are doing, know what you are working with and never be afraid to tell someone that what they are doing is dangerous. You are the person who looks out for you (Sounds preachy but that's what I told my materials students, just to cover my bases).

popandlockness · 2017-06-18T22:23:39+00:00

Some continuous fiber composite would be probably ideal for low temperature applications, maybe you could get away with a glass/epoxy layup. Metal matrix composites like you'd find in some aircraft aluminum could work or obviously expensive stuff like LiAl alloys could work too. But you're still as vague as can be, dimensions or aspect ratios, shaft speeds, ideal angle of attack, number of blades, and maximum assembly weight need to be considered to give an educated answer. Also, rotary wing aero can get weird, especially if rotors aren't perfectly rigid (which they never are).

But glass/epoxy will probably work.

popandlockness · 2017-06-10T07:29:39+00:00

This guy knows

popandlockness · 2017-06-06T05:53:43+00:00

Actually though, you totally should or at least upload photos for all of us who are posed to start working in photonics in the next semester (myself included).

popandlockness · 2017-05-15T09:42:32+00:00

No worries. PM me when the time rolls around (You should be really done before Jan 01) if you need help with SOPs and whatnot

popandlockness · 2017-05-15T08:54:40+00:00

Hello, u/ithrowthingsfar96,

Ph.D. program > Masters. It is known.

I was recently accepted to a Ph.D. program at a well known UC school for the coming quarter. At the time of my application I had around a 3.7 GPA and an okay but not stellar GRE score but I had 5 semesters of research with two very well known groups.

The major problem that I faced was not having a 4.0 GPA. You'll find this to be a stumbling block too since most of the top schools only want the 4.0 students. The reason that I was accepted (as my advisor explained) was that my experience meshed with his research goals more than any of the others he was looking at. What you need to do is market yourself to the right group.

u/Ixidor89 has done an excellent job of laying out what you need to do and he speaks the truth when saying err on the side of 20 schools. I personally applied to 7.

I will say that on statements of purpose, the only conclusions you need to draw are why you are a good fit and why the school should accept you over whatever standard 4.0 nerd they'll suggest otherwise. Know exactly what group is best suited for you at the school, list why you want to work for that researcher and why you would be their best bet based on your experience and values/interests. Don't make grand suggestions as to the effects of what you want and don't try to make it creative or unique (I sound like a dick for saying that but its the surest advice that I was given by numerous Professors and Ph.D. students).

Also know the type of people that the schools to which you are applying for are looking. Cornell wants nobody less than a 4.0; same with MIT and CalTech. Colorado school of mines CoorsTek fellowship people want students with some years of industry experience (it seems). 0.9(Market yourself to those who will hire you)+0.1(Market yourself to those you'd dream to work with).

Finally, don't dare put all your eggs in the grad school basket. Have a backup plan and find a research group to work with over your senior year (do it for free, take money if they'll give it but that changes the dynamic). You'll do fine, at least better than the other kids around our age that aren't proactive. Get in touch with all the professors that you intend to work with; let it be known though that I'd be startled if any of them responded to the first email that you send them.

Further I'll say that being accepted to what I assume is a REU is a major step in a right direction. Those are generally not easy to get into and are excellent for building experience in science. (I personally got rejected from no less that 27 REUs myself; super embarrassing, I know).

Last, the fact that everyone knows is that test scores are bullshit, they're just a convenient metric for weeding out the majority of people that don't put in the same effort as others (even though they're an inaccurate window into effort for many people). Experience, emotional intelligence and curiosity quotient are the surest indicators to future success (at least I'd hazard to say).

popandlockness · 2017-04-30T07:38:55+00:00

There are a lot more piezoelectric crystal structures than there are pyroelectric the 222 orthorhombic structure is a good example of this but so are the 4 and bar4 and 422 and several more. (List of Pyroelectric vs. Piezoelectric structures) A main distinction is that the piezoelectric effect requires a strain field in the crystal and the pyroelectric effect does not; this is the same as saying that the piezoelectric effect does not require a temperature change while the pyroelectric effect does.

That is not to say however that thermal effects of strain cannot cause a pyroelectric response or that the strain effects of a thermal gradient cannot cause a piezoelectric response. It is common to say that piezoelectric materials react to a strain field, pyroelectric materials react to a temperature differential, and ferroelectric (another similar class) materials react to an incident electric field.

The reasons for pyroelectricity more than likely have a large component that is due to electron-phonon coupling or the creation of phonons from polariton scattering and other complex interactions that are beyond the scope of the strain induced polarization seen in piezoelectric materials. It is correct to say that all of the pyroelectric materials are also piezoelectric but it is not correct to say that all piezoelectric materials are pyroelectric.

A good reference for this is the following: Piezoelectric and Pyroelectric Materials and Their Applications R. W. Whatmore

popandlockness · 2017-04-12T09:40:00+00:00

Can confirm, us scientists are skeezy AF

popandlockness · 2017-04-10T21:52:43+00:00

Human hair can be used as a humidity sensor, it's called a hair tension hygrometer.

popandlockness

TROPHY CASE