Black Holes Are Not So Black (Part 3) - Gravitational Waves

The Hippocratic Oath is one of the most famous pieces of medical writing, and it includes some of the basic ethical guidelines for medical practitioners. It is also constantly evolving. The images above come from a version of the oath that we found in the 1634 edition of Peter Lowe’s surgical text. If you compare it to this example of a modern version, you’ll notice some similarities and some differences. Both of them emphasize respecting the work of prior physicians and protecting the patient’s privacy. On the other hand, the modern oath doesn’t begin with an invocation to the gods, and it makes no mention of refusing to assist in abortions or any type of treatment that involves cutting. These changes illustrate how the practice of medicine, and what we expect of medical practitioners, changes over time.

New students at the Washington University School of Medicine are given the chance to devise their own student oath that is similar to the Hippocratic Oath. Take a look at the 2016 class oath here.

Can you flatten a sphere?

The answer is NO, you can not. This is why all map projections are innacurate and distorted, requiring some form of compromise between how accurate the angles, distances and areas in a globe are represented.

This is all due to Gauss’s Theorema Egregium, which dictates that you can only bend surfaces without distortion/stretching if you don’t change their Gaussian curvature.

The Gaussian curvature is an intrinsic and important property of a surface. Planes, cylinders and cones all have zero Gaussian curvature, and this is why you can make a tube or a party hat out of a flat piece of paper. A sphere has a positive Gaussian curvature, and a saddle shape has a negative one, so you cannot make those starting out with something flat.

If you like pizza then you are probably intimately familiar with this theorem. That universal trick of bending a pizza slice so it stiffens up is a direct result of the theorem, as the bend forces the other direction to stay flat as to maintain zero Gaussian curvature on the slice. Here’s a Numberphile video explaining it in more detail.

However, there are several ways to approximate a sphere as a collection of shapes you can flatten. For instance, you can project the surface of the sphere onto an icosahedron, a solid with 20 equal triangular faces, giving you what it is called the Dymaxion projection.

The Dymaxion map projection.

The problem with this technique is that you still have a sphere approximated by flat shapes, and not curved ones.

One of the earliest proofs of the surface area of the sphere (4πr2) came from the great Greek mathematician Archimedes. He realized that he could approximate the surface of the sphere arbitrarily close by stacks of truncated cones. The animation below shows this construction.

The great thing about cones is that not only they are curved surfaces, they also have zero curvature! This means we can flatten each of those conical strips onto a flat sheet of paper, which will then be a good approximation of a sphere.

So what does this flattened sphere approximated by conical strips look like? Check the image below.

But this is not the only way to distribute the strips. We could also align them by a corner, like this:

All of this is not exactly new, of course, but I never saw anyone assembling one of these. I wanted to try it out with paper, and that photo above is the result.

It’s really hard to put together and it doesn’t hold itself up too well, but it’s a nice little reminder that math works after all!

Here’s the PDF to print it out, if you want to try it yourself. Send me a picture if you do!

Vintage postcards showing women taking sand baths in hot springs city of Beppu pre WW2 (seen on). Sunayu are still done today (and it’s great!)

1.8 M Width House by YUUA Architects and Associates

Happy almost birthday, Shakespeare! Or should I say Bard-thday? Recently, in honour of the 400th anniversary of William Shakespeare’s death (conveniently for celebratory purposes, he was born on April 23 1564 and died on the same day in 1616), I was given the incredible opportunity to have a private audience to go through the University of Glasgow’s copy of the First Folio, page by page. I’ve written a short article for the University Library’s blog, which you can find here, but I wanted to share some other images on my own blog that I didn’t have room for on the official post!

The University of Glasgow’s First Folio (more properly known as Mr. William Shakespeare’s Comedies, Histories, & Tragedies) is able to tell so many more stories than those of the plays contained in its pages- of the history of the antiquarian book trade, of the printing practices of the Renaissance, of book ownership and value. Rest assured, you’ll probably be seeing posts from me in the future about all of these things, as well as the typographical ornaments used in the book, which I found fascinating. The University’s Folio is particularly interesting due to the notations by past owners, including one who had apparently seen at least one of the original Chamberlain’s Men “By eyewittnesse”. But my favourite bit of the later additions is the morbid little poem on the reverse of one of the flyleaves: “Pitty it is the fam’d Shakespeare/ Shall ever want his chin or haire.”

Words to replace said, except this actually helps

I got pretty fed up with looking for words to replace said because they weren’t sorted in a way I could easily use/find them for the right time. So I did some myself.

IN RESPONSE TO Acknowledged Answered Protested

INPUT/JOIN CONVERSATION/ASK Added Implored Inquired Insisted Proposed Queried Questioned Recommended Testified

GUILTY/RELUCTANCE/SORRY Admitted Apologized Conceded Confessed Professed

FOR SOMEONE ELSE Advised Criticized Suggested

JUST CHECKING Affirmed Agreed Alleged Confirmed

LOUD Announced Chanted Crowed

LEWD/CUTE/SECRET SPY FEEL Appealed Disclosed Moaned

ANGRY FUCK OFF MATE WANNA FIGHT Argued Barked Challenged Cursed Fumed Growled Hissed Roared Swore

SMARTASS Articulated Asserted Assured Avowed Claimed Commanded Cross-examined Demanded Digressed Directed Foretold Instructed Interrupted Predicted Proclaimed Quoted Theorized

ASSHOLE Bellowed Boasted Bragged

NERVOUS TRAINWRECK Babbled Bawled Mumbled Sputtered Stammered Stuttered

SUAVE MOTHERFUCKER Bargained Divulged Disclosed Exhorted

FIRST OFF Began

LASTLY Concluded Concurred

WEAK PUSY Begged Blurted Complained Cried Faltered Fretted

HAPPY/LOL Cajoled Exclaimed Gushed Jested Joked Laughed

WEIRDLY HAPPY/EXCITED Extolled Jabbered Raved

BRUH, CHILL Cautioned Warned

ACTUALLY, YOU’RE WRONG Chided Contended Corrected Countered Debated Elaborated Objected Ranted Retorted

CHILL SAVAGE Commented Continued Observed Surmised

LISTEN BUDDY Enunciated Explained Elaborated Hinted Implied Lectured Reiterated Recited Reminded Stressed

BRUH I NEED U AND U NEED ME Confided Offered Urged

FINE Consented Decided

TOO EMO FULL OF EMOTIONS Croaked Lamented Pledged Sobbed Sympathized Wailed Whimpered

JUST SAYING Declared Decreed Mentioned Noted Pointed out Postulated Speculated Stated Told Vouched

WASN’T ME Denied Lied

EVIL SMARTASS Dictated Equivocated Ordered Reprimanded Threatened

BORED Droned Sighed

SHHHH IT’S QUIET TIME Echoed Mumbled Murmured Muttered Uttered Whispered

DRAMA QUEEN Exaggerated Panted Pleaded Prayed Preached

OH SHIT Gasped Marveled Screamed Screeched Shouted Shrieked Yelped Yelled

ANNOYED Grumbled Grunted Jeered Quipped Scolded Snapped Snarled Sneered

ANNOYING Nagged

I DON’T REALLY CARE BUT WHATEVER Guessed Ventured

I’M DRUNK OR JUST BEING WEIRDLY EXPRESSIVE FOR A POINT/SARCASM Hooted Howled Yowled

I WONDER Pondered Voiced Wondered

OH, YEAH, WHOOPS Recalled Recited Remembered

SURPRISE BITCH Revealed

IT SEEMS FAKE BUT OKAY/HA ACTUALLY FUNNY BUT I DON’T WANT TO LAUGH OUT LOUD Scoffed Snickered Snorted

BITCHY Tattled Taunted Teased

Edit: People, I’m an English and creative writing double major in college; I understand that there’s nothing wrong with simply using “said.” This was just for fun, and it comes in handy when I need to add pizzazz. 

IT’S FOLLOW A LIBRARY DAY!! (according to Twitter)

In honor of this excellent bookish occasion, allow us to give special shout outs to all of the libraries that we have followed and/or have followed us here on Tumblr. For all of you bookworms and library cats out there that can’t get enough Booklrs, make sure to check these pages out and #followalibrary!!

@alachualibrary (The Alachua County Library District)

@badgerslrc (The Klamath Community College’s Learning Research Center)

@bflteens (Baker Free Library’s Tumblr For Teens)

@bibliosanvalentino​ (Biblioteca San Valentino [San Valentino Library])

@boonelibrary (Boone County Public Library)

@cheshirelibrary (Cheshire Public Library)

@cmclibraryteen​ (Cape May County Library’s Teen Services)

@darienlibrary (Darien Library)

@dcpubliclibrary (DC Public Library)

@detroitlib (Detroit Public Library Music, Arts & Literature Department)

@dplteens (Danville Public Library Teens)

@fontanalib (Fontana Regional Library)

@gastonlibrary (Gaston County Public Library)

@glendaleteenlibrary (Glendale Public Library Teens)

@hpl-teens (Homewood Public Library For Teens)

@myrichlandlibrary (Mansfield/Richland County Public Library)

@othmeralia  (Othmer Library of Chemical History)

@petit-branch-library (Petit Branch Library)

@pflibteens (Pflugerville Public Library Teenspace)

@schlowlibrary (Schlow Centre Region Library)

@southeastlibrary (Southeast Branch Library)

@tampabaylibraryconsortium-blog (Tampa Bay Library Consortium)

@teencenterspl (The Smith Public Library Teen Center)

@teensfvrl (Fraser Valley Regional Library)

@teen-stuff-at-the-library (White Oak Library District)

@ucflibrary (University of Central Florida Library)

@waynecountyteenzone (Wayne County Public Library’s Teen Space)

Hopefully we didn’t miss anyone! (And, you know, if you’re not already following US, now’s a good a chance as any. ;) Just putting it out there.)

On April 9, 1963, Winston Churchill was made an honorary citizen of the United States by John F. Kennedy. A most prestigious honor, it was still just one of many expressions of admiration that the British statesman was offered over the years. A 1946 letter from Churchill to Henry Luce shows him having to turn down honorary degrees from a number of prominent universities. He did, however, agree to a dinner hosted by the Time Inc. publisher at New York’s Union Club. It was a lavish affair, but not everything came off exactly as Luce might have hoped. The large ice sculpture of an eagle with its wings outstretched over mounds of black caviar was melting so quickly that a stream of water ran down the bird’s noble beak. At this Churchill remarked: “The eagle seems to have a cold.”

Winston Churchill. Letter to Henry Luce. February 26, 1946. Time Inc. Records. RG2: Bio files. New-York Historical Society.

Dinner in honor of…Winston S. Churchill…menu and seating arrangement. March 14, 1946. Time Inc. Records. RG2: Bio files. New-York Historical Society.

Processing of the Time Inc. Archive is made possible through the generous support of the Henry Luce Foundation

Molecule of the Day: VX

VX (C11H26NO2PS) is a colourless, odourless, oily liquid under room temperatures. It is a member of the V-series of nerve agents, and is an extremely potent poison - only 0.01 grams of it is needed to kill a person by skin contact. VX was recently implicated in the assassination of Kim Jong-nam, the half-brother of the North Korean leader Kim Jong-un, in Malaysia.

VX is a potent inhibitor of acetylcholinesterase, which breaks down the neurotransmitter acetylcholine into acetic acid and choline. The normal function of the enzyme is to regulate the concentration of acetylcholine within the synaptic cleft, so as to control the frequency of binding of acetylcholine to cholinergic receptors on the postsynaptic cell membrane and hence the transmission of impulses across the synapse.

Consequently, the inhibition of acetylcholinesterase results in a rapid increase in the synaptic concentration of acetylcholine, as the presynaptic knob continues to synthesise it and secrete it into the synaptic cleft. As a result, the cholinergic receptors on the postsynaptic cell membrane are continually stimulated, and a rapid series of action potentials are triggered. This results in muscle spasms and eventual paralysis, leading to death by asphyxiation due to paralysis of the diaphragm.

VX exposure is usually treated using an injection of atropine and pralidoxime. Atropine inhibits certain cholinergic receptors, reducing the binding of acetylcholine to receptors and thus the triggering of action potentials. On the other hand, one end of pralidoxime binds to acetylcholinesterase and the other binds to the phosphate group of VX, which causes the VX molecule to detach from the enzyme together with the pralidoxime molecule (see below). This restores the ability of acetylcholinesterase to hydrolyse acetylcholine, hence reducing its synaptic levels.

VX is synthesised from phosphorus trichloride over multiple steps; first, it is methylated, reacted with ethanol, then transesterified with N,N-diisopropylaminoethanol to produce QL. This is then oxidised with sulfur, and isomerised via heating to produce VX.